JP2018108714A - Three-dimensional modeling apparatus and material discharge member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a defect caused by a liquid component such as water existing in a transfer path of a material discharge member. SOLUTION: A material 4 used for modeling a three-dimensional model is introduced into an introduction unit 116a, and the material transferred through a transfer path 116 is heated by a heating unit and then discharged from a discharge unit 111. In the three-dimensional modeling apparatus provided with the above, an airflow generating means 1411 for generating an airflow in the transfer path portion for discharging gas in the transfer path portion on the upstream side in the material transfer direction from the heating portion to the outside of the transfer path portion. It is characterized by having 142. [Selection diagram] FIG. 10

Description

  The present invention relates to a three-dimensional modeling apparatus and a material discharge member.

  Conventionally, a material such as a resin used when modeling a three-dimensional structure is introduced into the introduction portion of the material discharge member, and the material transferred through the transfer path of the material discharge member is heated by the heating portion of the material discharge member. There is known a three-dimensional modeling apparatus that discharges from a discharge portion of a material discharge member later to model a three-dimensional structure.

  For example, Patent Document 1 discloses a three-dimensional modeling by a hot melt lamination method (FDM) in which a thermoplastic material is extruded while being heated at an outlet nozzle (discharge section) of an extrusion head (material discharging member) to form a three-dimensional structure. An apparatus is disclosed. In this three-dimensional modeling apparatus, the extrusion head is moved in a two-dimensional direction along a horizontal plane while extruding a thermoplastic material, so that a layered modeling structure is sequentially laminated on the platform, and finally the three-dimensional modeling object is formed. Model.

  However, in the conventional 3D modeling apparatus, moisture in the atmosphere or moisture contained in the material is condensed in the transfer path portion upstream of the heating part in the transfer path of the material discharge member, Due to the condensed water, there were problems such as deterioration of modeling quality and problems such as material clogging in the transfer path. In addition, this subject can arise similarly, when liquid components other than a water | moisture content exist in the said transfer path part.

  In order to solve the above-described problem, the present invention introduces a material used when modeling a three-dimensional structure into the introduction part, and heats the material transferred through the transfer path in the heating part and then from the discharge part. In the three-dimensional modeling apparatus provided with the material discharge member for discharging, an air flow is generated in the transfer path portion to discharge the gas in the transfer path portion upstream of the heating unit in the material transfer direction to the outside of the transfer path. It has an airflow generation means.

  According to the present invention, there is an excellent effect that it is possible to suppress problems caused by liquid components such as moisture existing in the transfer path of the material discharge member.

It is a block diagram which shows schematic structure of the three-dimensional modeling apparatus in embodiment. It is explanatory drawing which shows the detail of the same three-dimensional modeling apparatus typically. It is a perspective view which shows the external appearance of the chamber provided in the inside of the same three-dimensional modeling apparatus. It is a perspective view of the state which cut and excluded the front part of the three-dimensional modeling apparatus. It is a control block diagram of the same three-dimensional modeling apparatus. It is a flowchart which shows the flow of the pre-heat processing and modeling process in the same three-dimensional modeling apparatus. It is a perspective view which shows typically the front-end | tip part of the modeling head in the same three-dimensional modeling apparatus. It is a fragmentary sectional view of the modeling head corresponding to one nozzle. It is explanatory drawing which shows a mode that condensed water generate | occur | produces in the transfer pipe of the modeling head. It is explanatory drawing which put together the graph which shows the distribution of the internal temperature of a transfer pipe while showing typically the structure of the water | moisture-content discharge part in embodiment. It is the top view which showed typically the transfer pipe in which the air inlet was formed. It is a schematic diagram which shows the example which formed the helical groove part in the inner wall face of a transfer pipe. It is explanatory drawing which shows typically the other structure of the water | moisture-content discharge part in embodiment. In the same structure, it is the top view which showed typically the transfer pipe | tube with which the air inlet was formed. It is a schematic diagram which shows the structure of the water | moisture-content discharge part in the modification 1. It is a schematic diagram which shows the structure of the water | moisture-content discharge part in the modification 2.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[Overall description]
FIG. 1 is a block diagram showing a schematic configuration of a three-dimensional modeling apparatus 1 in the present embodiment.
The three-dimensional modeling apparatus 1 according to the present embodiment mainly includes a material supply unit 100, a three-dimensional modeling unit 200, a driving unit 300, and a control unit 400. In the three-dimensional modeling apparatus 1, each unit is driven by the driving unit 300 under the control of the control unit 400, and the three-dimensional modeling unit 200 models a three-dimensional modeled object using the material supplied from the material supply unit 100. .

[Material supply section]
The material supply unit 100 includes at least a modeling head 110 as a material discharge member, and a filament supply unit 120 that supplies a filament as a modeling material to the modeling head 110. The filament is an elongated wire-shaped solid, is set in the three-dimensional modeling apparatus 1 in a wound state, and is supplied to the nozzle 111 on the modeling head 110 by the filament supply unit 120. The filament supplied by the filament supply unit 120 is heated and melted by the modeling head 110, and the filament in the molten state is pushed out from the nozzle 111 by inserting the filament in the solid state from behind.

  The material pushed out from the nozzle 111 on the modeling head 110 includes not only a modeling material constituting the three-dimensional modeled object but also a support material that does not constitute the three-dimensional modeled object. This support material is usually formed of a material different from the modeling material (filament) constituting the three-dimensional modeled object, and finally removed from the three-dimensional modeled object formed of the filament. This support material is also heated and melted by the modeling head 110, and the support material in the molten state is pushed out from the nozzle 111 by inserting the filament of the solid support material from behind.

[Three-dimensional modeling department]
The three-dimensional modeling unit 200 includes at least a placement unit 210, a chamber 220, and a heating unit 230. The interior of the chamber 220 in the three-dimensional structure 200 is a processing space for modeling a three-dimensional structure. The melted filaments extruded from the modeling head 110 in the material supply unit 100 are supplied onto the stage of the placement unit 210 inside the chamber 220 heated by the heating unit 230 and are sequentially stacked in layers.

[Drive part]
The drive unit 300 includes at least an X-axis drive mechanism 310, a Y-axis drive mechanism 320, and a Z-axis drive mechanism 330. The driving unit 300 relatively moves the modeling head 110 of the material supply unit 100 and the stage of the mounting unit 210 in the three-dimensional modeling unit 200 by using these driving mechanisms 310, 320, and 330. Thereby, the filament extruded from the modeling head 110 of the material supply part 100 is supplied to the target position on a stage.

[Other functional parts]
The three-dimensional modeling apparatus 1 according to the present embodiment includes the material supply unit 100, the three-dimensional modeling unit 200, the driving unit 300, and the control unit 400, but other functional units are also added as appropriate.

[Details of 3D modeling equipment]
Next, details of the three-dimensional modeling apparatus 1 in the present embodiment will be described.
FIG. 2 is an explanatory diagram schematically showing details of the three-dimensional modeling apparatus 1 in the present embodiment.
FIG. 3 is a perspective view showing an appearance of a chamber provided inside the three-dimensional modeling apparatus 1 in the present embodiment.
FIG. 4 is a perspective view of a state in which the front portion of the three-dimensional modeling apparatus 1 in the present embodiment is cut and excluded.

  The three-dimensional modeling apparatus 1 includes a three-dimensional modeling chamber (hereinafter referred to as “chamber”) 220 inside the main body frame 2. Inside the chamber 220, a stage 211 of the placement unit 210 is provided. In the present embodiment, the modeling plate 212 is held on the stage 211 and a three-dimensional modeled object is modeled on the modeling plate 212.

  Most or all of the wall portion surrounding the processing space in the chamber 220 is formed of a heat insulating wall having a heat insulating function. Specifically, the ceiling wall portion of the chamber 220 is a heat insulating wall constituted by a plurality of slide heat insulating members 221 and 222, as will be described later. Further, the side wall portion 223 of the chamber 220, that is, both wall portions in the apparatus left-right direction (left-right direction in FIG. 3 and FIG. 4 = X-axis direction) is provided with a heat insulating material containing glass wool or the like between the inner and outer plates. It is a heat insulating wall with a sandwiched structure. The bottom wall 224 of the chamber 220 is also a heat insulating wall having a structure in which a heat insulating material containing glass wool or the like is sandwiched between an inner plate and an outer plate. The rear wall portion and the front wall portion 225 of the chamber 220 are also heat insulating walls having a structure in which a heat insulating material containing glass wool or the like is sandwiched between an inner plate and an outer plate.

  In the present embodiment, an opening / closing door 226 is provided on the front wall 225 of the chamber 220 as shown in FIG. The open / close door 226 constitutes a heat insulating wall in the same manner as the front wall portion 225, and is configured to exhibit a sufficient heat insulating function. Further, a window 227 is provided in the front wall 225 of the chamber 220 as shown in FIG. This window 227 has a double glass structure with an air layer interposed therebetween, and constitutes a heat insulating wall in the same manner as the front wall portion 225.

  A modeling head 110 of the material supply unit 100 is provided above the stage 211 inside the chamber 220. The modeling head 110 has a nozzle 111 that pushes the filament below. In the present embodiment, four nozzles 111 are provided on the modeling head 110, but the number of nozzles 111 is arbitrary. The modeling head 110 is provided with a head heating unit 112 that heats the filament supplied to each nozzle 111. Further, the modeling head 110 is provided with a head cooling unit 113 that cools the opposite side of the nozzle 111 with respect to the head heating unit 112, that is, the upstream side in the filament transfer direction with respect to the head heating unit 112.

  The filament may be different for each nozzle 111 or may be the same. In the present embodiment, the filament supplied from the filament supply unit 120 is heated and melted or softened by the head heating unit 112, and the molten filament is pushed out from the predetermined nozzle 111, thereby being held on the stage 211. A layered modeling structure is sequentially laminated on the modeling plate 212 to model a three-dimensional modeled object. In addition, the support material which does not comprise a three-dimensional structure may be supplied to the nozzle 111 on the modeling head 110 instead of the filament of the modeling material.

  The modeling head 110 is connected to the X-axis drive mechanism 310 extending in the left-right direction of the apparatus (left-right direction in FIG. 3 and FIG. 4 = X-axis direction) via the connecting member 311 in the longitudinal direction of the X-axis drive mechanism 310 ( (Movable along the X axis direction). The modeling head 110 can move in the left-right direction of the apparatus (X-axis direction) by the driving force of the X-axis driving mechanism 310. Since the modeling head 110 is heated by the head heating unit 112 and becomes high temperature, it is preferable that the connecting member 311 has a low heat conductivity so that the heat is not easily transmitted to the X-axis drive mechanism 310.

  Both ends of the X-axis drive mechanism 310 are in the longitudinal direction (Y of the Y-axis drive mechanism 320 with respect to the Y-axis drive mechanism 320 extending in the front-rear direction of the apparatus (the front-rear direction in FIGS. 3 and 4 = Y-axis direction). It is held so as to be slidable along the axial direction. As the X-axis drive mechanism 310 moves along the Y-axis direction by the driving force of the Y-axis drive mechanism 320, the modeling head 110 can move along the Y-axis direction.

  In the present embodiment, the bottom wall portion 224 of the chamber 220 is fixed to the main body frame 2 with respect to the Z-axis drive mechanism 330 that extends in the apparatus vertical direction (vertical direction in FIGS. 3 and 4 = Z-axis direction). The Z-axis drive mechanism 330 is held so as to be movable along the longitudinal direction (Z-axis direction). The bottom wall portion 224 of the chamber 220 can be moved in the vertical direction of the apparatus (Z-axis direction) by the driving force of the Z-axis driving mechanism 330. Since the stage 211 is fixed on the bottom wall portion 224, the stage 211 and the modeling plate 212 held by the stage 211 can be moved in the Z-axis direction by the driving force of the Z-axis driving mechanism 330.

  In the present embodiment, the chamber heater 231 of the heating unit 230 that heats the inside of the chamber 220 is provided in the chamber 220 (processing space). In this embodiment, in order to model a three-dimensional modeled object by the hot melt lamination method (FDM), it is desirable to perform the modeling process while maintaining the temperature in the chamber 220 at the target temperature. Therefore, in the present embodiment, pre-heat treatment is performed to raise the temperature in the chamber 220 to the target temperature in advance before starting the modeling process. The chamber heater 231 heats the chamber 220 to raise the temperature inside the chamber 220 to the target temperature during the pre-heat treatment, and maintains the temperature in the chamber 220 at the target temperature during the modeling process. Therefore, the inside of the chamber 220 is heated.

  The driving target of the X-axis drive mechanism 310 and the Y-axis drive mechanism 320 in this embodiment is the modeling head 110, and a part of the modeling head 110 (the tip portion of the modeling head 110 including the nozzle 111) is disposed in the chamber 220. Has been. In the present embodiment, the interior of the chamber 220 is shielded from the outside even when the modeling head 110 is moved in the X-axis direction. Specifically, in the ceiling wall portion of the chamber 220, as shown in FIGS. 3 and 4, a plurality of X-axis slide heat insulating members 221 elongated in the Y-axis direction are arranged side by side in the X-axis direction. The adjacent X-axis slide heat insulating members 221 are configured to be slidable relative to each other in the X-axis direction. Thereby, even if the modeling head 110 is moved in the X-axis direction by the X-axis drive mechanism 310, the plurality of X-axis slide heat insulating members 221 are slid in the X-axis direction accordingly, and the processing space in the chamber 220 is The upper part is always covered with the X-axis slide heat insulating member 221.

  Similarly, in the ceiling wall portion of the chamber, as shown in FIGS. 3 and 4, a plurality of Y-axis slide heat insulating members 222 are arranged side by side in the Y-axis direction. The adjacent Y-axis slide heat insulating members 222 are configured to be slidable relative to each other in the Y-axis direction. Thereby, even if the modeling head 110 on the X-axis drive mechanism 310 is moved in the Y-axis direction by the Y-axis drive mechanism 320, the plurality of Y-axis slide heat insulating members 222 slide in the Y-axis direction accordingly. The upper part of the processing space in the chamber 220 is always covered with the Y-axis slide heat insulating member 222.

  In addition, the driving target of the Z-axis driving mechanism 330 in the present embodiment is the bottom wall portion 224 of the chamber 220 or the stage 211 (or the modeling plate 212). In the present embodiment, the inside of the chamber 220 is shielded from the outside even if the bottom wall 224 or the stage 211 is moved in the Z-axis direction.

  In addition, in the present embodiment, the in-device cooling device 3 for cooling the space inside the three-dimensional modeling apparatus 1 outside the chamber 220 and the nozzle cleaning unit 240 for cleaning the nozzle 111 of the modeling head 110. A head cooling device 130 for cooling the head cooling unit 113 of the modeling head 110 is also provided.

FIG. 5 is a control block diagram of the three-dimensional modeling apparatus 1 of the present embodiment.
In the present embodiment, an X-axis position detection mechanism 315 that detects the position of the modeling head 110 in the X-axis direction is provided. The detection result of the X-axis position detection mechanism 315 is sent to the control unit 400. The control unit 400 controls the X-axis drive mechanism 310 based on the detection result to move the modeling head 110 to the target position in the X-axis direction.

  In the present embodiment, a Y-axis position detection mechanism 325 that detects the Y-axis direction position of the X-axis drive mechanism 310 (the Y-axis direction position of the modeling head 110) is provided. The detection result of the Y-axis position detection mechanism 325 is sent to the control unit 400. The control unit 400 moves the modeling head 110 on the X-axis drive mechanism 310 to a target Y-axis direction position by controlling the Y-axis drive mechanism 320 based on the detection result.

  In the present embodiment, a Z-axis position detection mechanism 335 that detects the position in the Z-axis direction of the modeling plate 212 held on the stage 211 is provided. The detection result of the Z-axis position detection mechanism 335 is sent to the control unit 400. The control unit 400 controls the Z-axis drive mechanism 330 based on the detection result to move the modeling plate 212 on the stage 211 to a target Z-axis direction position.

  The control unit 400 controls the movement of the modeling head 110 and the stage 211 in this manner, so that the relative three-dimensional position between the modeling head 110 and the modeling plate 212 on the stage 211 in the chamber 220 is determined as a target. It can be located in a three-dimensional position.

FIG. 6 is a flowchart showing the flow of pre-heat treatment and modeling processing in the present embodiment.
In this embodiment, when the control unit 400 starts modeling by a user's instruction operation or the like, first, the energization to the chamber heater 231, the head heating unit 112, and the stage heating unit 232 is turned on to operate them. Then, the moisture discharge unit 140 described later is also operated (S1). Further, the control unit 400 controls the Z-axis drive mechanism 330 to raise the stage 211 from a predetermined standby position (for example, the lowest point) by the driving force of the Z-axis drive mechanism 330 (S2). When the stage 211 reaches the preheating position (Yes in S3), the driving of the Z-axis drive mechanism 330 is stopped (S4).

  When the temperature of the processing space reaches the target temperature (Yes in S5), the control unit 400 subsequently proceeds to modeling processing. The three-dimensional shape data of the three-dimensional structure to be modeled by the three-dimensional modeling apparatus 1 of the present embodiment is obtained from an external device such as a personal computer connected to the three-dimensional modeling apparatus 1 so that data communication can be performed by wire or wirelessly. Entered. The control unit 400 generates data (slice data for modeling) of a large number of layered structures decomposed in the vertical direction based on the input three-dimensional shape data. The slice data corresponding to each layered structure corresponds to each layered structure formed by the filaments extruded from the modeling head 110 of the three-dimensional modeling apparatus 1, and the thickness of the layered structure is the three-dimensional modeling It is appropriately set according to the capability of the device 1.

  In the modeling process, first, the control unit 400 creates a lowermost layered structure on the surface of the modeling plate 212 held on the stage 211 in accordance with the slice data of the lowermost layer (first layer) (S6). Specifically, the control unit 400 controls the X-axis drive mechanism 310 and the Y-axis drive mechanism 320 based on the slice data of the lowermost layer (first layer), and sets the tip of the nozzle 111 of the modeling head 110 to the target position. The filament is pushed out from the nozzle 111 while sequentially moving to (target position on the XY plane). Thereby, a layered structure according to the slice data of the lowermost layer (first layer) is formed on the surface of the modeling plate 212 on the stage 211. In addition, although the support material which does not comprise a three-dimensional structure may be created together, description here is abbreviate | omitted.

  Next, the control unit 400 controls the Z-axis drive mechanism 330 to lower the stage 211 by a distance corresponding to one layer of the layered structure, and the modeling plate 212 on the stage 211 is moved to the next layer (first layer). The position is lowered to a position for creating a (two-layer) layered structure and positioned (S8). Thereafter, the control unit 400 controls the X-axis drive mechanism 310 and the Y-axis drive mechanism 320 based on the slice data of the second layer, and sequentially moves the tip of the nozzle 111 of the modeling head 110 to the target position, From 111, the filament is extruded. Thereby, the layered structure according to the slice data of the second layer is formed on the lowermost layered structure formed on the modeling plate 212 of the stage 211 (S6).

  In this way, the control unit 400 controls the Z-axis drive mechanism 330 to repeat the process of stacking and modeling each layered structure in order from the lower layer while sequentially lowering the stage 211. When the creation of the uppermost layered structure is completed (Yes in S7), a three-dimensional structure according to the input three-dimensional shape data is formed on the modeling plate 212.

  When the modeling process is completed in this way, the control unit 400 controls the Z-axis drive mechanism 330 to lower the stage 211 to a predetermined extraction position (the lowest point in the present embodiment) (S9). This take-out position is set at a position where the open / close door 226 provided on the front wall portion 225 of the chamber 220 is opened so that the three-dimensional structure on the stage 211 can be easily taken out of the chamber 220.

  Immediately after the modeling process is finished, the processing space in the chamber 220 is still hot, so the user cannot immediately open the open / close door 226 and take out the three-dimensional modeled object in the processing space. Therefore, after the temperature in the processing space is lowered to a temperature at which the user can take out, the user opens the door 226 and takes out the three-dimensional structure in the processing space while being fixed to the modeling plate 212. The control unit 400 provides a cooling period in which the door 226 is locked until the temperature in the processing space decreases to a temperature at which the processing space can be taken out. It is preferable to release the locked state.

[Details of modeling head]
Next, the configuration and operation of the modeling head 110 will be described in detail.
FIG. 7 is a perspective view schematically showing a tip portion of the modeling head 110 in the present embodiment.
FIG. 8 is a partial cross-sectional view of the modeling head 110 corresponding to one nozzle 111.
In the modeling head 110 of this embodiment, as shown in FIG. 7, four nozzles 111 are arranged in 2 × 2 (in FIG. 2, the four nozzles 111 are shown side by side for convenience of explanation. Yes.) The four nozzles 111 are respectively covered (enclosed) by individual head heating units 112, and the control unit 400 can individually control each head heating unit. Thereby, the material such as the filament 4 or the support material can be individually heated by the head heating unit 112 for each nozzle 111.

  As shown in FIG. 7, the head heating unit 112 is attached to a heat insulating unit 114 made of a heat insulating material, and the heat insulating material of the heat insulating unit 114 is interposed between the head heating units 112. Thereby, the heat of the head heating unit 112 during the heat treatment is prevented from propagating to the other head heating unit 112 and the filament 4 of the other nozzle 111 is heated.

  Further, a head cooling unit 113 is provided on the opposite side of the nozzle 111 from the head heating unit 112, that is, on the upstream side in the transfer direction of the filament 4 with respect to the head heating unit 112. As shown in FIG. 7, the head cooling unit 113 has a single block shape made of an endothermic material having a high heat transfer property such as aluminum, and is common to the four head heating units 112. However, a configuration may be adopted in which individual head cooling units 113 are provided for each of the four head heating units 112.

  In the head heating unit 112 and the head cooling unit 113, a transfer pipe 116 for forming a transfer path for transferring the filament 4 to the nozzle 111 is disposed so as to penetrate therethrough. The upper end of the transfer pipe 116 (the end on the upstream side in the transfer direction of the filament 4) becomes an introduction part 116a for introducing the filament 4, and the filament 4 introduced from the introduction part 116a is inside the transfer pipe 116 (transfer And the nozzle 111 is transferred. In the middle of the transfer, the filament 4 in the transfer pipe 116 becomes molten (or softened) by the heat of the head heating unit 112, and the molten filament 4 ′ is transferred to the nozzle 111.

  The heat from the head heating unit 112 propagates not only to the filament part of the transfer pipe 116 passing through the head heating part 112 but also to the upstream side in the filament transfer direction from that part. At this time, when the filament 4 at a location distant from the head heating unit 112 in the transfer direction is heated and melted, the filament solidifies at the location when the heating process by the head heating unit 112 is stopped or interrupted. As a result, even if the heat treatment by the head heating unit 112 is resumed thereafter, it takes time until the filament at that location is remelted. In this case, the filament 4 fed by the filament supply unit 120 cannot be transferred in the modeling head 110 and is clogged. Accordingly, the heating range of the filament 4 by the head heating unit 112 is prevented from expanding as much as possible to the upstream side in the filament transfer direction so that the fixed filament can be rapidly remelted after the heating process by the head heating unit 112 is resumed. It is important to.

  Therefore, in this embodiment, the head cooling unit 113 is provided on the upstream side of the head heating unit 112 in the filament transfer direction. The heat-absorbing material constituting the head cooling unit 113 is in close contact with the transfer pipe 116 through which the filament 4 passes, and the head cooling unit 113 absorbs the heat of the filament 4 in the transfer pipe 116 and cools it. As a result, the heating range of the filament 4 by the head heating unit 112 is prevented from expanding to the upstream side in the filament transfer direction.

FIG. 9 is an explanatory view showing a state in which condensed water 5 ′ is generated in the transfer pipe 116 of the modeling head 110 and a graph showing the distribution of the internal temperature of the transfer pipe 116.
A temperature gradient as described on the left side of FIG. 9 is generated inside the transfer pipe 116 of the modeling head 110 due to the influence of the head heating unit 112 and the head cooling unit 113. At this time, the inner wall surface of the transfer tube portion upstream of the head heating unit 112 in the filament transfer direction becomes 100 ° C. or less, and condensed water 5 ′ is generated on the inner wall surface and the surface of the filament 4 existing on the transfer tube portion. There is a case. As the generation factor of this condensed water 5 ', the following two factors can be mainly considered.

First, moist air 5 containing moisture around the modeling head 110 enters from the introduction portion 116 a of the transfer pipe 116, and moisture (or other liquid component) contained in the humid air 5 is caused by the head cooling portion 113. Condensation is generated by cooling, and condensed water 5 ′ is generated on the inner wall surface of the transfer pipe 116 and the surface of the filament 4.
Secondly, moisture (or other liquid component) in the filament evaporates from the melted filament 4 ′ melted by the heat of the head heating unit 112 to become humid air 5, and the humid air 5 is converted by the head cooling unit 113. Condensation is generated by cooling, and condensed water 5 ′ is generated on the inner wall surface of the transfer pipe 116 and the surface of the filament 4.

  The condensed water 5 ′ generated in this way travels along the inner wall surface of the transfer pipe 116 and the surface of the filament 4 by gravity, and is taken into the molten filament 4 ′ melted by the heat of the head heating unit 112, and melted there. Increase the water content in the filament 4 '. Thereby, for example, the moisture expands as water vapor in the molten filament 4 ′, and by pushing up the upper surface position of the molten filament 4 ′, the molten filament 4 ′ flows back through the transfer pipe 116 to a low temperature and solidifies. Cause filament clogging.

Actually, when the present inventor formed a three-dimensional object having an arbitrary shape under the following conditions, the discharge / stop repetition operation (including the operation of retracting the filament 4 by 20 mm when discharge is stopped) is continued. In the meantime, the filament 4 could not be sent to the filament supply unit 120, and the filament could not be pushed out from the nozzle 111. In this situation, when the inside of the transfer pipe 116 was confirmed, it was confirmed that the molten filaments flow backward (solidification of the liquid level) and water droplets adhere to the inner wall surface.
Transfer tube 116: The material is SUS316, the outer diameter is 5 mm, the inner diameter is 2.3 mm, and the length is 60 mm.
・ Nozzle: The material is brass, the nozzle hole diameter is 0.4mm, and the taper angle in the nozzle is 118 °.
Filament: PEEK, outer diameter 1.75 mm, moisture content: 800 ppm.
-Modeling conditions: head heating part temperature 380 ° C., head cooling part temperature 50 ° C., filament feed rate (speed at introduction part) 8 mm / sec.
-Modeling environment: environmental temperature 25 ° C, relative humidity 60%

  Further, when the water content in the molten filament 4 ′ increases, for example, the molten filament 4 ′ having a high water content is pushed out, and the moisture causes a phenomenon such as a steam explosion, and the surface of the three-dimensional structure is formed. Bubbles are generated, resulting in deterioration of modeling quality.

  Therefore, in the present embodiment, the portion of the transfer pipe 116 on the upstream side of the filament transfer direction with respect to the molten filament 4 ′ that is in a molten state due to the heat of the head heating unit 112, in other words, the filament transfer direction with respect to the head heating unit 112. A moisture discharging unit 140 is provided as a liquid component discharging unit that discharges moisture (or other liquid components) present in the upstream transfer tube 116 to the outside of the transfer tube 116.

[Details of water drainage section]
Next, the configuration and operation of the moisture discharging unit 140 will be described in detail.
The moisture discharge unit 140 in the three-dimensional modeling apparatus of the present embodiment is configured by an airflow generation unit that generates an airflow in the transfer pipe 116 that discharges the gas in the transfer pipe 116 to the outside of the transfer pipe 116. This airflow prevents the condensed water 5 'from being generated in the transfer pipe 116 of the modeling head 110, or removes the generated condensed water 5'.

FIG. 10 is an explanatory diagram schematically showing the configuration of the moisture discharge unit 140 in the present embodiment and also showing a graph showing the distribution of the internal temperature of the transfer pipe 116.
FIG. 11 is a plan view schematically showing the transfer pipe 116 in which the air inlet 117 is formed in the present embodiment.
The moisture discharge unit 140 according to the present embodiment is configured such that the air flow A generated by the air flow generation unit 141 such as a pump is transferred from the air introduction port 117 formed in the transfer pipe 116 of the modeling head 110 via the transfer tube 142. The humid air 5 inside the transfer pipe 116 is discharged from the introduction part 116 a of the transfer pipe 116 to the outside by the air flow A.

  In the present embodiment, as shown in FIG. 10, the air introduction port 117 is formed in the transfer pipe 116 so that the airflow A sent from the air introduction port 117 is directed to the introduction portion 116 a of the transfer pipe 116. As a result, an air flow A is generated inside the transfer pipe 116 from the downstream side in the filament transfer direction to the upstream side. In this case, a portion in the transfer pipe 116 closer to the nozzle 111 (on the downstream side in the filament transfer direction) than the air inlet port 117 into which the air stream A is sent, that is, the air inlet position of the air inlet port 117 and the upper surface position of the molten filament 4 ′. The portion in the transfer pipe 116 between the two is in a negative pressure state. Accordingly, the humid air 5 present on the nozzle 111 side with respect to the air introduction port 117 is also sucked out to the air flow feeding position side of the air introduction port 117, and discharged from the introduction portion 116a of the transfer pipe 116 to the outside by the air flow A. Can do.

  In the present embodiment, as shown in FIG. 11, the direction in which the airflow A sent from the air introduction port 117 deviates from the central axis of the transfer pipe 116 on a virtual plane orthogonal to the filament transfer direction of the transfer pipe 116. An air inlet 117 is formed in the transfer pipe 116 so as to go to. As a result, the airflow A sent from the air introduction port 117 flows into the gap between the peripheral surface of the filament 4 and the inner wall surface of the transfer pipe 116, avoiding the filament 4 transferred along the central axis of the transfer pipe 116. As a result, the airflow A sent from the air introduction port 117 is reduced in the decrease in the flow velocity due to the collision with the filament 4 and flows around the filament 4 in a spiral shape as shown in FIG. It is possible to escape from the introduction part 116a of the transfer pipe 116 to the outside.

  At this time, a spiral groove 116b may be formed on the inner wall surface of the transfer pipe 116, as shown in FIG. 12, so that the airflow A fed from the air introduction port 117 flows more smoothly and spirally. .

  Further, the air flow feeding position of the air introduction port 117 is preferably on the upstream side in the air flow traveling direction, that is, on the nozzle 111 side (downstream side in the filament transfer direction), rather than the position where the condensed water 5 ′ is assumed to be generated. In the present embodiment, specifically, the nozzle 111 side (downstream side in the filament transfer direction), that is, the water from the region where the temperature inside the transfer pipe 116 is lower than the temperature at which water vaporizes (about 100 ° C.). It is preferable to set the airflow feeding position of the air introduction port 117 at a region where the temperature is higher than the vaporization temperature.

  The “temperature” here is preferably “temperature” in a state where the airflow A is generated, but it is difficult to measure the internal temperature of the transfer pipe 116 in a state where the airflow A is generated. May be “temperature” in a state where the airflow A is not generated.

  Even if the airflow feeding position of the air introduction port 117 is set in a region where the temperature is lower than the temperature at which water is vaporized, the wetness on the upstream side in the airflow traveling direction from the airflow feeding position, that is, on the nozzle 111 side (downstream side in the filament transfer direction) The air 5 can also be discharged by the airflow A due to the effect of the negative pressure state. Therefore, a certain effect can be obtained even if the airflow feeding position of the air introduction port 117 cannot be set in a region where the temperature is higher than the temperature at which the water vaporizes due to structural limitations of the modeling head 110.

  According to the present embodiment, the condensed air 5 ′ is generated by discharging the humid air 5 in the transfer pipe 116 to the outside of the transfer pipe 116 by the air flow A generated in the transfer pipe 116 by the moisture discharge unit 140. Can be prevented. Further, even if condensed water 5 ′ is generated inside the transfer pipe 116, the condensed water 5 ′ is naturally evaporated when it hits the condensed water 5 ′ and is discharged to the outside of the transfer pipe 116 on the air flow A. Therefore, the generated condensed water 5 ′ can be removed.

In this embodiment, in order to improve the discharge speed of the water vapor generated in the transfer pipe 116, the amount of water (gas) sent into the transfer pipe 116 is preferably as small as possible, and is dry air. desirable. However, if it is less than saturated water vapor, an effect is produced. As a method of reducing the moisture content of the air (gas) fed into the transfer pipe 116, for example, a method of reducing the moisture content of the introduced air by using moisture removing means such as a desiccant rotor can be mentioned. In this case, the desiccant rotor can be dehydrated easily by using an electric heater or the like, but the remaining heat of the chamber heater may be used.
Further, in this embodiment, in order to improve the discharge speed of the water vapor generated in the transfer pipe 116, it is preferable that the flow velocity of the air flow A generated in the transfer pipe 116 is as fast as possible.

Next, the effect confirmation test of the moisture discharging unit 140 in the present embodiment will be described.
In this effect confirmation test, a three-dimensional structure having an arbitrary shape was formed under the following conditions using the three-dimensional structure forming apparatus of the present embodiment.
Transfer tube 116: The material is SUS316, the outer diameter is 5 mm, the inner diameter is 2.3 mm, and the length is 60 mm.
・ Nozzle: The material is brass, the nozzle hole diameter is 0.4mm, and the taper angle in the nozzle is 118 °.
Filament: PEEK, outer diameter 1.75 mm, moisture content: 800 ppm.
-Modeling conditions: head heating part temperature 380 ° C., head cooling part temperature 50 ° C., filament feed rate (speed at introduction part) 8 mm / sec.
-Modeling environment: environmental temperature 25 ° C, relative humidity 60%

The airflow introduction condition of this effect confirmation test is that the airflow feeding position of the air introduction port 117 is 35 mm from the tip of the nozzle 111 (position where the airflow A is not generated and 110 ° C.), and the airflow A is as described above. It was made to flow spirally. The diameter of the air inlet 117 is 1.5 mm. The air sent from the air inlet 117 has a temperature of room temperature (25 ° C.), a relative humidity of 10 to 20%, and a flow rate of the airflow generation unit 141 of 3000 mm ³ / min.

  In this effect confirmation test, the filament 4 cannot be fed by the filament supply unit 120 even if repeated discharge / stop operations (including the operation of retracting the filament 4 by 20 mm when discharge is stopped) are performed during the 10-hour modeling period. There was no situation, and there was no situation where the filament could not be pushed out from the nozzle 111. After the modeling period, when the inner wall surface of the introduction part 116a of the transfer pipe 116 was confirmed, adhesion of water droplets was not confirmed.

  In the present embodiment, the air introduction port 117 formed in the transfer pipe 116 is only one, but the air introduction ports 117 may be formed at two or more locations. For example, as shown in FIGS. 13 and 14, if the air introduction ports 117 are formed at a plurality of locations that are rotationally symmetric with respect to the central axis of the transfer pipe 116, the air flows introduced from the air introduction ports 117 are mutually connected. Without disturbing, the above-described spiral flow can be formed more strongly.

  In the present embodiment, the air flow A is generated in the transfer pipe 116 from the downstream side in the filament transfer direction to the upstream side, but conversely, in the transfer pipe 116, the upstream side from the upstream side in the filament transfer direction to the downstream side. The structure which generates the airflow which goes to may be sufficient. This configuration can be realized, for example, by generating a suction airflow with an airflow generation unit 141 such as a pump.

[Modification 1]
Next, a modified example (hereinafter, this modified example is referred to as “modified example 1”) of the moisture discharging unit 140 in the embodiment described above will be described.
FIG. 15 is a schematic diagram illustrating a configuration of the moisture discharging unit 140 according to the first modification.
In the first modification, the transfer pipe 116 of the modeling head 110 is formed with a plurality of openings 116c penetrating through the wall of the transfer pipe 116 as shown in FIG. Each opening part 116c is arrange | positioned so that it may open outside the chamber 220 (outside the upper wall side of the chamber 220).

  In the first modification, an air flow B ′ is generated by the fan of the in-device cooling device 3 outside the chamber 220 in which each opening 116c is opened, and the air flow B ′ flows toward each opening 116c. Yes. In the first modification, by taking this air flow B ′ from the opening 116 c into the transfer pipe 116, an air flow B that causes the gas in the transfer pipe 116 to be discharged to the outside of the transfer pipe 116 is generated in the transfer pipe 116. .

  In the first modification, in order to efficiently take in the external air flow B ′ from the opening 116 c into the transfer pipe 116, as shown in FIG. 15, the external air flow B ′ is opened in each opening 116 c. Fins 118 are provided as air guide members that guide the portion 116c. In the first modification, as shown in FIG. 15, the fins made of aluminum are formed so that an inclined surface (inclination of about 30 ° with respect to the horizontal plane) inclined upward toward the opening 116c of the transfer pipe 116 is formed. 118 is arranged.

  Also in the first modification, when the same effect confirmation test as that of the above-described embodiment was performed, the discharge / stop repeated operation (including the operation of retracting the filament 4 by 20 mm when the discharge was stopped) was performed during the 10-hour modeling period. However, there was no situation where the filament 4 could not be fed by the filament supply unit 120, and there was no situation where the filament could not be pushed out from the nozzle 111. After the modeling period, when the inner wall surface of the introduction part 116a of the transfer pipe 116 was confirmed, adhesion of water droplets was not confirmed.

  Further, in the first modification, the state where the air flow B ′ by the fan of the in-device cooling device 3 is not directed to the opening 116c, that is, the air flow B ′ is not taken into the transfer pipe 116 from the opening 116c. In the state, the same effect confirmation test was conducted. As a result, condensed water 5 ′ is generated on the inner wall of the transfer pipe 116, but the generated condensed water 5 ′ flows along the inner wall of the transfer pipe 116 and enters the opening 116 c formed in the transfer pipe 116. From there, it flowed out of the transfer pipe 116 along the inclination of the fin 118. Therefore, by forming an opening 116c for allowing water flowing along the inner wall of the transfer pipe portion to flow out of the transfer pipe 116 in the portion of the transfer pipe 116 upstream of the head heating unit 112 in the filament transfer direction. Even in a state where no airflow is generated inside the transfer pipe 116, the above-described problems can be suppressed.

[Modification 2]
Next, another modified example (hereinafter, this modified example is referred to as “modified example 2”) of the moisture discharging unit 140 in the above-described embodiment will be described.
FIG. 16 is a schematic diagram illustrating a configuration of the moisture discharging unit 140 according to the second modification.
In the second modification, a part of the transfer pipe 116 of the modeling head 110, specifically, the transfer pipe portion upstream of the head heating unit 112 in the filament transfer direction is a porous member as a breathable member. The metal porous body 119 is formed. The metal porous body 119 is disposed so as to be exposed to the outside of the chamber 220 (outside the upper wall side of the chamber 220).

  In the second modification, an air flow B ′ is generated by the fan of the in-device cooling device 3 outside the chamber 220 where the metal porous body 119 is exposed, and the air flow B ′ flows toward the metal porous body 119. Yes. In the second modification, the air flow B ′ is taken into the transfer pipe 116 through the metal porous body 119, thereby generating the air flow B in the transfer pipe 116 that discharges the gas in the transfer pipe 116 to the outside of the transfer pipe 116. .

  Also in the second modification, when the same effect confirmation test as that of the above-described embodiment was performed, the discharge / stop repeated operation (including the operation of retracting the filament 4 by 20 mm when the discharge was stopped) was performed during the 10-hour modeling period. However, there was no situation where the filament 4 could not be fed by the filament supply unit 120, and there was no situation where the filament could not be pushed out from the nozzle 111. After the modeling period, when the inner wall surface of the introduction part 116a of the transfer pipe 116 was confirmed, adhesion of water droplets was not confirmed.

  The present invention is not limited to the above-described hot melt laminating method (FDM), but introduces a material used when modeling a three-dimensional structure into the introduction section, and heats the material transferred through the transfer path. If it is a three-dimensional modeling apparatus provided with the material discharge | emission member discharged | emitted from a discharge part after heating in a part, it is applicable also to the three-dimensional modeling apparatus which models a three-dimensional molded item with another modeling method.

What was demonstrated above is an example, and there exists an effect peculiar for every following aspect.
(Aspect A)
After introducing the material such as the filament 4 used when modeling the three-dimensional structure into the introduction part 116a and heating the material transferred through the transfer path such as the transfer pipe 116 with the heating part such as the head heating part 112 In the three-dimensional modeling apparatus 1 including a material discharge member such as a modeling head 110 that discharges from a discharge unit such as a nozzle 111, the gas in the transfer path portion upstream of the heating unit in the material transfer direction is transferred to the outside of the transfer path. It is characterized by having an air flow generating means such as a water discharge unit 140 for generating an air flow to be discharged into the transfer path portion.
When there are many liquid components such as moisture in the transfer path of the material discharge member, the gas containing the liquid component is cooled and condensed in the transfer path portion on the upstream side in the material transfer direction from the heating section, and the condensed liquid As described above, problems such as deterioration in modeling quality and material clogging in the transfer path are caused. According to this aspect, it is possible to prevent the condensed liquid from being generated in the transfer path of the material discharge member due to the air flow generated by the air flow generating means, or to remove the generated condensed liquid. Therefore, the malfunction resulting from the liquid component which exists in the transfer path of a material discharge | emission member can be suppressed.

(Aspect B)
In the aspect A, the air flow generation means generates an air flow from the downstream side in the material transfer direction to the upstream side in the transfer path portion.
According to this, the place near the heating part in the transfer path can be brought into a negative pressure state, and the gas containing the liquid component existing at the position can be sucked out and discharged to the outside of the transfer path by the air flow.

(Aspect C)
In the aspect B, the air flow generating means generates the air flow from a portion of the transfer path portion that is at a temperature equal to or higher than a temperature at which a liquid component existing in the transfer path portion is vaporized without generating the air flow. It is characterized by.
According to this, air current can be generated in the entire transfer path portion where the liquid component can condense and become liquid, and the liquid component existing in the transfer path of the material discharge member can be discharged more effectively. it can.

(Aspect D)
In the aspect B, the airflow generation means generates the airflow from a portion of the transfer path portion that is at a temperature equal to or higher than a temperature at which a liquid component existing in the transfer path portion is vaporized in a state where the airflow is generated. It is characterized by that.
According to this, air current can be generated in the entire transfer path portion where the liquid component can condense and become liquid, and the liquid component existing in the transfer path of the material discharge member can be discharged more effectively. it can.

(Aspect E)
In any one of the aspects A to D, the airflow generation means generates the airflow by sending a gas having a moisture content smaller than the moisture content of the external gas in the transfer path into the transfer path portion. It is characterized by.
According to this, the liquid component which exists in the transfer path of a material discharge | emission member can be discharged | emitted more effectively.

(Aspect F)
In the aspect E, the airflow generation means feeds a gas obtained by removing moisture from an external gas of the transfer path by a moisture removal means such as a sicant rotor into the transfer path.
According to this, gas with a small water content can be sent into the transfer path portion with a simple configuration.

(Aspect G)
In any one of the aspects A to F, a spiral groove 116b is formed on the inner wall of the transfer path portion.
According to this, an airflow that flows spirally is generated in the gap between the material transferred through the transfer path and the inner wall of the transfer path, and the liquid component existing in the transfer path of the material discharge member is discharged more effectively. can do.

(Aspect H)
In any of the above aspects A to G, the airflow generation means causes the airflow B ′ flowing outside the transfer path to enter the transfer path portion through the opening 116c formed in the outer wall of the transfer path portion. The air flow B is generated by taking in, and an air guide member such as a fin 118 that guides the air flow flowing outside the transfer path toward the opening is provided on the outer wall of the transfer path. It is characterized by being.
According to this, the airflow B can be generated in the transfer path portion using the airflow B ′ flowing outside the transfer path.

(Aspect I)
In any one of the above aspects A to G, the air flow generating means transmits the air flow B ′ flowing outside the transfer path through a gas-permeable member such as a porous metal body 119 forming an outer wall of the transfer path portion. The airflow B is generated by taking it into the transfer path portion.
According to this, the airflow B can be generated in the transfer path portion using the airflow B ′ flowing outside the transfer path.

(Aspect J)
After introducing the material such as the filament 4 used when modeling the three-dimensional structure into the introduction part 116a and heating the material transferred through the transfer path such as the transfer pipe 116 with the heating part such as the head heating part 112 In the three-dimensional modeling apparatus 1 including a material discharging member such as the modeling head 110 that discharges from a discharging unit such as the nozzle 111, liquid components such as moisture existing in a transfer path portion upstream of the heating unit in the material transfer direction. It has liquid component discharge means, such as the moisture discharge part 140 discharged | emitted outside the said transfer path, It is characterized by the above-mentioned.
When there are many liquid components such as moisture in the transfer path of the material discharge member, the gas containing the liquid component is cooled and condensed in the transfer path portion on the upstream side in the material transfer direction from the heating section, and the condensed liquid As described above, problems such as deterioration in modeling quality and material clogging in the transfer path are caused. According to this aspect, since the liquid component in the transfer path of the material discharge member can be discharged by the liquid component discharge means, problems caused by the liquid component existing in the transfer path of the material discharge member can be suppressed.

(Aspect K)
In the aspect J, the liquid component discharging means is configured to cause the liquid flowing along the inner wall of the transfer path portion to flow out from the opening 116c formed in the outer wall of the transfer path to the outside of the transfer path. Features.
According to this, even if condensed liquid is generated in the transfer path of the material discharge member, the condensed liquid can be removed.

(Aspect L)
After introducing the material such as the filament 4 used when modeling the three-dimensional structure into the introduction part 116a and heating the material transferred through the transfer path such as the transfer pipe 116 with the heating part such as the head heating part 112 In the material discharge member such as the modeling head 110 that discharges from the discharge portion such as the nozzle 111, an air flow is generated in the transfer path portion upstream of the heating portion in the material transfer direction, separately from the introduction portion. An airflow inlet or an airflow outlet such as the air inlet 117 for generating the air is formed.
According to this, it is possible to generate an air flow in the transfer path portion by introducing the air flow through the air flow introduction port, or to generate an air flow in the transfer path portion by discharging the air flow through the air flow discharge port. It is possible to prevent the condensed liquid from being generated in the transfer path of the material discharge member or to remove the generated condensed liquid by the air flow thus generated.

(Aspect M)
After introducing the material such as the filament 4 used when modeling the three-dimensional structure into the introduction part 116a and heating the material transferred through the transfer path such as the transfer pipe 116 with the heating part such as the head heating part 112 In the material discharge member such as the modeling head 110 discharged from the discharge portion such as the nozzle 111, the liquid flowing along the inner wall of the transfer passage portion is transferred to the transfer passage portion upstream of the heating portion in the material transfer direction. An opening 116c for flowing out of the road is formed.
According to this, even if condensed liquid is generated in the transfer path of the material discharge member, the condensed liquid can be removed.

DESCRIPTION OF SYMBOLS 1 3D modeling apparatus 4 Filament 4 'Molten filament 5 Wet air 5' Condensed water 100 Material supply part 110 Modeling head 111 Nozzle 112 Head heating part 113 Head cooling part 114 Heat insulation part 116 Transfer pipe 116a Introduction part 116b Groove part 116c Opening part 117 Air inlet 118 Fin 119 Metal porous body 120 Filament supply unit 130 Head cooling device 140 Water discharge unit 141 Air flow generation unit 142 Transfer tube 200 Three-dimensional modeling unit 210 Mounting unit 220 Chamber 230 Heating unit 240 Nozzle cleaning unit 300 Driving unit 310 X-axis drive mechanism 320 Y-axis drive mechanism 330 Z-axis drive mechanism 400 Control unit

Japanese Patent No. 399933

Claims (13)

In a three-dimensional modeling apparatus provided with a material discharge member that introduces a material used when modeling a three-dimensional model into the introduction unit, heats the material transferred through the transfer path in the heating unit, and then discharges the material from the discharge unit ,
A three-dimensional modeling apparatus comprising an air flow generating means for generating an air flow in the transfer path portion for discharging the gas in the transfer path portion upstream of the heating unit in the material transfer direction to the outside of the transfer path. . The three-dimensional modeling apparatus according to claim 1,
The three-dimensional modeling apparatus characterized in that the air flow generating means generates an air flow from the downstream side in the material transfer direction to the upstream side in the transfer path portion. The three-dimensional modeling apparatus according to claim 2,
The airflow generating means generates the airflow from a portion of the transfer path portion that is at a temperature equal to or higher than a temperature at which a liquid component present in the transfer path portion is vaporized without generating the airflow. Original modeling device. The three-dimensional modeling apparatus according to claim 2,
The airflow generating means generates the airflow from a portion of the transfer path portion that is at a temperature equal to or higher than a temperature at which a liquid component present in the transfer path portion is vaporized in a state where the airflow is generated. 3D modeling equipment. In the three-dimensional modeling apparatus according to any one of claims 1 to 4,
The three-dimensional modeling apparatus, wherein the air flow generating means generates the air flow by sending a gas having a moisture content smaller than a moisture content of an external gas of the transfer path into the transfer path portion. The three-dimensional modeling apparatus according to claim 5,
The three-dimensional modeling apparatus, wherein the air flow generation means sends a gas obtained by removing moisture from an external gas of the transfer path by a moisture removing means into the transfer path. The three-dimensional modeling apparatus according to any one of claims 1 to 6,
A three-dimensional modeling apparatus, wherein a spiral groove is formed on an inner wall of the transfer path portion. The three-dimensional modeling apparatus according to any one of claims 1 to 7,
The air flow generation means generates the air flow by taking in the air flow flowing outside the transfer path into the transfer path part through an opening formed in the outer wall of the transfer path part.
The three-dimensional modeling apparatus, wherein an outer wall of the transfer path is provided with an air guide member that guides an airflow flowing outside the transfer path toward the opening. The three-dimensional modeling apparatus according to any one of claims 1 to 7,
The airflow generation means generates the airflow by taking in an airflow flowing outside the transfer path into the transfer path part through a breathable member that forms an outer wall of the transfer path part. Original modeling device. In a three-dimensional modeling apparatus provided with a material discharge member that introduces a material used when modeling a three-dimensional model into the introduction unit, heats the material transferred through the transfer path in the heating unit, and then discharges the material from the discharge unit ,
A three-dimensional modeling apparatus comprising liquid component discharge means for discharging a liquid component existing in a transfer path portion upstream of the heating unit in the material transfer direction to the outside of the transfer path. The three-dimensional modeling apparatus according to claim 10,
The three-dimensional modeling characterized in that the liquid component discharging means causes the liquid flowing along the inner wall of the transfer path portion to flow out from the opening formed in the outer wall of the transfer path to the outside of the transfer path. apparatus. In the material discharge member that introduces the material used when modeling the three-dimensional structure into the introduction part, and discharges the material transferred through the transfer path from the discharge part after being heated by the heating part,
In addition to the introduction part, an airflow inlet or an airflow outlet for generating an airflow is formed in the transfer path part upstream of the heating part in the material transfer direction. Characteristic material discharge member. In the material discharge member that introduces the material used when modeling the three-dimensional structure into the introduction part, and discharges the material transferred through the transfer path from the discharge part after being heated by the heating part,
An opening for allowing the liquid flowing along the inner wall of the transfer path portion to flow out of the transfer path is formed in the transfer path portion upstream of the heating unit in the material transfer direction. Material discharging member.

Images