CN222473378U - 3D printing system - Google Patents

Abstract

A material changing mechanism for a 3D printer and a 3D printing system. The material changing mechanism comprises: a bracket; a material guiding unit arranged on the bracket, the material guiding unit comprising a plurality of sub-material guiding pipes and a material guiding port connected to the plurality of sub-material guiding pipes, the material guiding port being used to engage with a main material pipe of the 3D printer; and a plurality of material changing units arranged on the bracket. Thus, a plurality of material lines can be automatically provided for the 3D printer according to printing needs, and the material tray can be easily replaced.

Description

3D printing system

The application is a divisional application, the application number of the original application is 202390000127.6, and the original application date is 2023, 01 and 12.

The priority of the prior application 202210058867.7, filed on date 2022, 01, 17, is claimed in the original application, the entire contents of which are incorporated herein by reference.

Technical Field

The disclosure relates to the technical field of 3D printing, in particular to a 3D printing system.

Background

The 3D printer is also called a three-dimensional printer or a stereoscopic printer, and constructs a three-dimensional object by printing layer by layer. The 3D printer includes a print head for extruding the printing material and a print stage for depositing the printing material to form a three-dimensional object. The print head is configured to be movable relative to the print platform and to extrude the printing material onto the print platform while moving. The printing material is deposited layer by layer on the surface of the printing platform and fused together to form a three-dimensional object.

With the development of 3D printing technology, the color and material diversification requirements of printed objects are also increasing, and how to meet the diversification printing requirements has become a research hot spot.

Disclosure of utility model

It would be advantageous to provide a mechanism that alleviates, mitigates or even eliminates one or more of the above problems.

According to one aspect of the disclosure, a material changing mechanism for a 3D printer is provided, and the material changing mechanism comprises a support, a material guiding unit arranged on the support, wherein the material guiding unit comprises a plurality of sub-material guiding pipes and a material guiding opening communicated with the sub-material guiding pipes, the material guiding opening is used for being jointed with a main material guiding pipe of the 3D printer, and a plurality of material changing units arranged on the support, and each of the material changing units automatically performs feeding operation and discharging operation of a corresponding material tray in a plurality of material trays for the 3D printer. According to the material changing mechanism for the 3D printer, various material lines can be automatically provided for the 3D printer according to printing requirements, and the material tray can be replaced conveniently. Each of the plurality of material changing units comprises a supporting shaft assembly, a plurality of material changing units and a plurality of material changing units, wherein the supporting shaft assembly is rotatably connected to the bracket and is used for contacting with the rim of a corresponding material tray in the plurality of material trays to support the corresponding material tray; and the feeding and discharging mechanism is used for driving the stockline wound on the corresponding charging tray to be led into the main material guiding pipe through one corresponding sub material guiding pipe in the plurality of sub material guiding pipes when the 3D printer performs feeding operation, and driving the corresponding charging tray to rotate when the 3D printer performs discharging operation, so that the stockline which is withdrawn from the main material guiding pipe through the material guiding unit is wound back onto the corresponding charging tray.

According to an aspect of the present disclosure, there is provided a 3D printing system including a 3D printer and the reloading mechanism of the foregoing aspect

These and other aspects of the disclosure will be apparent from and elucidated with reference to the embodiments described hereinafter.

Drawings

Further details, features and advantages of the present disclosure are disclosed in the following description of exemplary embodiments, with reference to the following drawings, wherein:

FIG. 1 illustrates a schematic perspective view of a refueling mechanism according to some exemplary embodiments of the present disclosure;

FIG. 2 illustrates a schematic side view of a cartridge mechanism according to some exemplary embodiments of the present disclosure;

FIG. 3 illustrates a backside structural schematic of a refueling mechanism according to some exemplary embodiments of the present disclosure;

FIG. 4 illustrates a schematic perspective view of a reloading mechanism after removal of a tray and loading and unloading mechanisms according to some exemplary embodiments of the present disclosure;

FIG. 5 illustrates a schematic perspective view of a refueling mechanism with a tray and a top cover removed according to some exemplary embodiments of the present disclosure, and

Fig. 6 illustrates a schematic perspective view of a refueling mechanism according to some exemplary embodiments of the present disclosure.

Detailed Description

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present disclosure.

Spatially relative terms, such as "below," "under," "lower," "under," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that these spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "under" or "beneath" other elements or features would then be oriented "over" the other elements or features. Thus, the example terms "below" and "under" may encompass both an orientation of above and below. Terms such as "before" or "before" and "after" or "followed by" may similarly be used, for example, to indicate the order in which light passes through the elements. The device may be oriented in other ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items, and the phrase "at least one of a and B" means a alone, B alone, or both a and B.

It will be understood that when an element or layer is referred to as being "on," "connected to," "coupled to," or "adjacent to" another element or layer, it can be directly on, connected to, coupled to, or adjacent to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly connected to," "directly coupled to," or "directly adjacent to" another element or layer, there are no intervening elements or layers present. However, in no event "on" or "directly on" should be construed as requiring one layer to completely cover an underlying layer.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and/or the present specification and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

In the related art, when printing different colors or different materials, the 3D printer needs to manually replace the tray, and has complex operation and low efficiency.

To alleviate, mitigate, or even eliminate one or more of the above-mentioned problems, embodiments of the present disclosure provide a reloading mechanism for a 3D printer and a 3D printing system, which can automatically provide various stocklines for the 3D printer according to printing needs, and can facilitate replacement of a tray.

Embodiments of the present disclosure are described in detail below with reference to the attached drawings.

Fig. 1 illustrates a schematic perspective view of a charging mechanism according to some embodiments of the present disclosure, fig. 2 illustrates a schematic side view of a charging mechanism according to some embodiments of the present disclosure, and fig. 3 illustrates a schematic backside view of a charging mechanism according to some embodiments of the present disclosure.

Referring to fig. 1 to 3, some embodiments of the present disclosure provide a reloading mechanism for a 3D printer, including a stand 100, a plurality of reloading units 300, and a single loading unit 200.

The material guiding unit 200 is disposed on the bracket 100. The material guiding unit 200 includes a plurality of sub-material guiding pipes 210 and a material guiding opening 220 communicating with the sub-material guiding pipes 210. The feed port 220 is for engagement with a main feed tube of a 3D printer.

The plurality of the reloading units 300 are disposed on the stand 100. Each of the plurality of refueling units 300 automatically performs a loading operation and a unloading operation of a corresponding one of the plurality of trays for the 3D printer, wherein each of the refueling units 300 includes a support shaft assembly 310 and a loading and unloading mechanism 320. The support shaft assembly 310 is rotatably connected to the bracket 100, which is operable to contact the rim 410 of a corresponding one of the plurality of trays 400 to support the corresponding tray 400. The loading and unloading mechanism 320 is used for driving the stockline wound on the corresponding tray 400 to be led into the main guide pipe through one corresponding sub-guide pipe 210 of the plurality of sub-guide pipes 210 when the 3D printer performs the loading operation, and is used for driving the corresponding tray 400 to rotate when the 3D printer performs the unloading operation, so that the stockline withdrawn from the main guide pipe via the guide unit 200 is wound back onto the corresponding tray 400.

In some embodiments of the present disclosure, the bracket 100 may be made of plastic or metal, and the bracket 100 is used to mount the guide unit 200 and the cartridge unit 300.

In the embodiment of the present disclosure, the material guiding unit 200 includes a plurality of sub-material guiding pipes 210, and the sub-material guiding pipes 210 are connected to one material guiding port 220. In some embodiments, the plurality of sub-feed pipes 210 may be processed through an integral molding process, but the present disclosure is not limited thereto.

In some embodiments, the guide unit 200 may further include a multi-pass member 240, the multi-pass member 240 connecting the plurality of sub-guide tubes 210 to the guide port 220. The manifold 240 may have an outlet for engaging the main conduit, and a plurality of inlets in communication with the outlet for connecting to a sub-conduit 210, and the outlets may form the conduit 220. In some embodiments, an auxiliary extrusion wheel (not shown) is disposed inside the manifold 240 to assist the loading and unloading mechanism 320 in loading and unloading operations. In some embodiments, a stockline sensor (not shown) may also be provided inside the manifold 240 to detect the position of the stockline in the guide line.

For each tray 400, it may include two baffles disposed at intervals along the rotation axis of the tray and a cylindrical or cylindrical winding portion located between the two baffles, and the winding portion may be used to wind the stockline, and the radius of the baffles is greater than that of the winding portion so as to prevent the stockline from falling off from the winding portion. The cylindrical surface of each baffle may constitute the rim 410 of the tray 400. The free end of the strand of each tray 400 may extend into a corresponding sub-feed conduit 210.

The reloading unit 300 includes a supporting shaft assembly 310 and a loading and unloading mechanism 320. The support shaft assembly 310 can be rotatably coupled to the bracket 100. For example, the support shaft assembly 310 may be coupled to the bracket 100 through a bearing. The cylindrical surface of the support shaft assembly 310 is used to contact the rim 410 of the tray 400, thereby supporting the tray 400. The support shaft assembly 310 may be in force-transmitting contact with the rim 410 of the tray 400 such that when one of them rotates, the other may follow the rotation. The structure of the support shaft assembly 310 may be various, and will be further described later.

In some embodiments, the loading and unloading mechanism 320 may be used to drive the tray to rotate and achieve loading and unloading. For example, the loading and unloading mechanism 320 may include a loading motor and an unloading motor, which may be respectively in driving connection with the tray. Taking the feeding motor as an example, it may be possible to achieve the rotation of the tray by driving a friction wheel in contact with the rim 410 of the tray 400. For another example, the feeding motor can also directly drive the stockline to move by driving a friction wheel in direct contact with the stockline, and drive the tray to rotate by the movement of the stockline.

In any case, when the 3D printer performs the feeding operation, the feeding motor may be used to drive the tray 400 to rotate in the forward direction, so that the stock line wound on the corresponding tray 400 is guided into the main guide pipe through one corresponding sub guide pipe 210, through the guide port 220. When the 3D printer performs a discharging operation, the discharging motor may be used to drive the corresponding tray 400 to rotate in a reverse direction, so that the free end of the stock line is withdrawn from the main guide pipe via the guide unit 200. The withdrawn stock line can be rewound back onto the corresponding tray 400, thereby avoiding the problem that the stock line is accumulated around the tray 400 to be wound around other mechanisms after material withdrawal.

When the stock line needs to be replaced, the current stock line can be withdrawn from the main guide pipe through the feeding and discharging mechanism 320 corresponding to the current stock line, and then the required stock line is guided into the main guide pipe through the feeding and discharging mechanism 320 corresponding to the required stock line. And during printing, the printing motor of the 3D printer can drive the stockline in the main material pipe to move, so that the tray 400 is dragged to rotate. At this time, the feeding motor and the discharging motor may be further separated from the tray 400 by transmission, so that the movement of the tray 400 is not affected.

In addition, the loading and unloading mechanism 320 may be configured to have only one driving motor, in addition to the loading motor and the unloading motor, and forward and reverse rotation of the tray may be achieved by forward and reverse rotation of the driving motor.

By arranging the material guiding unit 200 and the material changing unit 300, required material lines can be automatically provided for the 3D printer, printing of three-dimensional objects with various colors or various materials is realized, and the redundant material lines after material returning can be automatically wound on the material tray 400, so that the neatness around the material tray 400 is maintained. Meanwhile, the supporting shaft assembly 310 can reduce friction when the material plate rotates, and feeding and discharging are facilitated. Also, since the support shaft assembly 310 is supported by the rim 410 of the tray 400, the tray 400 may be mounted to the refueling mechanism by gravity only, without other complicated mounting structures. After the stockline is consumed, the tray 400 can be conveniently taken down from the material changing mechanism without disassembling other parts, and the replacement is convenient.

In some embodiments, referring to fig. 4, the support shaft assembly 310 includes a first support shaft group 311 and a second support shaft group 312 rotatably connected to the supporter 100, respectively, the first support shaft group 311 and the second support shaft group 312 being spaced apart from each other in the circumferential direction of the corresponding tray 400, and a first rotation axis of the first support shaft group 311, a second rotation axis of the second support shaft group 312, and a rotation axis of the corresponding tray 400 being parallel to each other.

Referring to fig. 1, the tray 400 is disposed on a front side of the loading and unloading mechanism 320, and the first support shaft group 311 and the second support shaft group 312 are respectively mounted on front and rear sides of the tray 400, thereby performing a stable support function.

Fig. 4 is a schematic perspective view of a material changing mechanism according to some embodiments of the present disclosure after removing a tray and a loading and unloading mechanism, and fig. 5 is a schematic perspective view of a material changing mechanism according to some embodiments of the present disclosure after removing a tray and a top cover. Referring to fig. 4 and 5, in some embodiments, the first support shaft group 311 includes two first support shafts 3111, and the two first support shafts 3111 are arranged along the first rotation axis such that circumferential surfaces of the two first support shafts 3111 are respectively in contact with the two rims 410 of the corresponding trays 400 when the corresponding trays 400 are mounted in the loading mechanism.

One end of each first support shaft 3111 facing away from the other may be connected to the bracket 100 by a bearing. For example, the bracket 100 may be convexly provided with a support plate, an outer ring of the bearing may be fixed to the support plate, and an inner ring of the bearing may be fixedly coupled to the first support shaft 3111, so that the first support shaft 3111 may be rotatably coupled to the bracket 100. The two first support shafts 3111 respectively contacting with the two rims 410 are provided, so that the first support shaft group 311 can be reduced in size while stably supporting, and the installation of other structures is facilitated.

In some embodiments, a gear 3112 is disposed on at least one first support shaft 3111 of the two first support shafts 3111, and the gear 3112 is configured to be driven by the feeding and discharging mechanism 320 when the 3D printer performs the feeding operation, so that the first support shaft 3111 rotates the corresponding tray 400 to wind the stockline back onto the corresponding tray 400.

Gear 3112 may be coaxially coupled to a first support shaft 3111, which may be rotated synchronously. The feeding and discharging mechanism 320 may be drivingly connected to the gear 3112, for example, the discharging motor may be drivingly connected to the gear 3112 through a transmission mechanism, so that during discharging, the gear 3112 is driven to rotate, and the tray 400 is driven to rotate in the opposite direction by friction between the first support shaft 3111 and the tray 400. During feeding and printing, the discharging motor can be separated from the gear 3112 in a transmission manner, so that the first support shaft 3111 can freely rotate following the tray 400.

In some embodiments, an end of the respective sub-feed pipes 210 remote from the feed port 220 is disposed adjacent to an intermediate portion of the first support shaft group 311 along the first rotational axis. This allows the free end of the stock line on the tray 400 to enter the sub-feed pipe 210 at a proper angle with respect to the winding portion of the tray 400, reducing friction generated during loading and unloading. In some embodiments, an end of the corresponding sub-feeding tube 210 far away from the feeding port 220 is disposed below a middle position near the two first support shafts 3111, so that the stockline can freely drop into the sub-feeding tube 210 by gravity, which is more convenient to use.

In some embodiments, the two first support shafts 3111 may be coaxially connected to each other, and the middle portion of the first support shaft group 311 is a connection shaft 3113, and the radial dimension of the connection shaft is smaller than the radial dimension of the two first support shafts 3111. The two first support shafts 3111 may be connected via the connecting shaft 3113, so as to improve the strength of the first support shaft group 311, and at the same time, reduce the space of the first support shaft group 311, so as to avoid the occurrence of larger friction between the stockline and the support shaft group.

In other embodiments, the two first support shafts 3111 may be separated from each other, and the middle portion of the first support shaft group 311 is a gap between the two first support shafts 3111, so that the occupied space of the first support shaft group 311 may be further reduced.

In some embodiments, the second support shaft set 312 includes two second support shafts 3121, the two second support shafts 3121 being arranged along the second rotation axis such that when the respective tray 400 is installed in the refueling mechanism, circumferential surfaces of the two second support shafts 3121 are respectively in contact with the two rims 410 of the respective tray 400. The first supporting shaft group 311 can be reduced in size while stably supporting, so that other structures can be conveniently installed. In some embodiments, the two second support shafts 3121 are coaxially connected to each other or separated from each other, similar to the two first support shafts 3111, both of which can realize support of the tray 400.

The second support shaft 3121 is provided similarly to the first support shaft 3111. Referring to fig. 2, the second support shaft 3121 is located at the rear side of the tray 400, the first support shaft 3111 is located at the front side of the tray 400, the front side of the tray 400 is provided with the loading and unloading mechanism 320 and the sub-feed pipe 210, and the rear side is not provided with the structure. The structure and function of the second support shaft 3121 may be specifically referred to the first support shaft 3111, and will not be described again.

In some embodiments, the feeding and discharging mechanism 320 is disposed on a side of the first supporting shaft set 311 away from the second supporting shaft set 312, and a channel 321 for passing through a stockline is further disposed in the feeding and discharging mechanism 320, and the channel 321 is engaged with the corresponding sub-feeding tube 210. The channel 321 can play a guiding role, and the size of the stockline exposed outside the channel 321 and the material guiding unit 200 is reduced, so that the stockline is prevented from being wound on other parts, and meanwhile, the replacement of the material tray can be facilitated. In some possible embodiments, the end of the sub-feed tube 210 remote from the corresponding channel 321 connects to one inlet of the manifold through the middle region of the second support shaft set 312.

One end of the channel 321, which is opposite to the ion guide tube 210, may be provided with a horn-shaped opening, so that a stock line easily enters the channel 321, thereby facilitating the replacement of the tray 400. Here, the term "trumpet-shaped opening" means that an end of the channel 321 facing away from the sub-guide pipe 210 has a gradually increasing inner diameter in a direction toward the outside of the channel 321.

With continued reference to fig. 4-5, the support 100 may be provided with an arcuate slot 110 extending in a predetermined direction, at least one divider 120 being provided in the arcuate slot 110, the at least one divider 120 being spaced apart in the predetermined direction to divide the arcuate slot 110 into a plurality of segments, each segment for at least partially receiving a respective one of the plurality of trays 400.

The arc-shaped groove 110 may extend in a predetermined direction such that the surface of the bracket 100 has a downward depression. The predetermined direction may be an arrangement direction of the plurality of trays 400, and the partition 120 may have a rib structure. The partition 120 may be one or more, and when it is plural, the plurality of partitions 120 may be disposed at intervals along a predetermined direction so as to partition the arc-shaped groove 110 into a plurality of segments, each of which may accommodate at least a portion of one corresponding tray 400 therein, so that the volume of the refueling mechanism may be reduced, resulting in a compact structure.

Referring to fig. 3, the guide unit 200 may be located at a side of the bracket 100 facing away from the arc-shaped groove 110, that is, the tray 400 may be disposed at an upper side of the bracket 100, and the guide unit 200 may be disposed at a lower side of the bracket 100, so that the structure is compact.

Referring to fig. 4 and 5, the surface of the holder 100 facing the plurality of trays 400 is provided with at least one desiccant groove 130 for accommodating a desiccant, a top cover 140 is detachably mounted at an opening of each desiccant groove 130, and a plurality of ventilation holes 150 are provided on the top cover 140.

In some embodiments, the desiccant tank 130 may be located at the bottom of the arc tank 110, and the top cover 140 may have an arc structure adapted to the wall of the arc tank 110, i.e. the top cover 140 may form part of the wall of the arc tank 110 and smoothly transition with other walls of the arc tank 110, so that the entire arc tank 110 may accommodate the corresponding tray 400.

The top cover 140 may have a plurality of ventilation holes 150 arranged in an array manner, so that the desiccant may absorb water vapor in the surrounding environment and keep the surrounding environment dry, thereby providing a suitable working environment for the material changing mechanism.

In addition, the desiccant tank 130 may be provided according to the number of segments, for example, one desiccant tank 130 is provided in each segment, and for example, one desiccant tank 130 may be shared by a plurality of segments, and at this time, the size of the partition may be reduced so that the desiccant tank 130 may span a plurality of segments, and may be provided according to the need.

In some embodiments, the reloading mechanism further comprises a humidity sensor 500, the humidity sensor 500 may be used to detect the humidity of the surrounding environment of the plurality of trays 400. When the humidity exceeds a threshold value suitable for working, an alarm can be given to prompt the user to replace the desiccant, or stop working, etc. The humidity sensor 500 may be disposed at various positions, for example, in a circuit board on the back of the stand 100.

In some embodiments, the charging mechanism further comprises an identification sensor 600, which identification sensor 600 may be used for identifying identification information of the tray. The information identified by the identification sensor 600 may be information of the length of the strand, the color or material of the strand, etc. in the tray 400. The identification information may be, for example, a bar code or a two-dimensional code provided on the tray. The identification sensor 600 may be used to scan the identification information and obtain information about the take off tray 400 or the stockline. The identification sensor 600 may be provided on the stand 100, for example, one identification sensor 600 may be provided for each tray 400. Still another or more trays 400 may share one recognition sensor 600.

In some embodiments, the reloading mechanism includes a circuit board that may be disposed between two adjacent trays 400, and the identification sensor 600 may be disposed on the circuit board so that the identification information of both trays 400 may be scanned simultaneously.

Fig. 6 illustrates a schematic perspective view of a refueling mechanism according to some embodiments of the present disclosure. Referring to fig. 6, in some embodiments, the refueling mechanism further includes a bottom case 700 and a cover 800 mated with the bottom case 700, the bottom case 700 and the cover 800 together define a receiving space, the bracket 100, the guide unit 200, and the plurality of the refueling units 300 are all received in the receiving space, and the cover 800 can move relative to the bottom case 700 to open or close the receiving space.

In this embodiment, the bottom chassis 700 may have a box-packed structure, the cover 800 may be disposed at an opening of the bottom chassis 700, the cover 800 may be detachably coupled to the bottom chassis 700, or the cover 800 may be rotatably coupled to the bottom chassis 700, so that the receiving space may be opened or closed.

The materials of the bottom case 700 and the cover 800 may be various, and for example, plastic, metal, or the like may be used. The bottom shell 700 and the cover 800 can be used for transporting and using the material changing mechanism as a whole, and the drying of the accommodating space is more favorable to be maintained, and the material tray 400 can be replaced conveniently.

The embodiment of the disclosure also provides a 3D printing system, which comprises a 3D printer and the material changing mechanism of any embodiment. The 3D printer may be a device capable of realizing printing of a three-dimensional object, and the structure and function of the reloading structure are the same as those of the above-described embodiment, and specific reference is made to the above-described embodiment.

According to the 3D printing system provided by the embodiment of the disclosure, the material guiding unit 200 and the material changing unit 300 are arranged in the material changing mechanism, so that required material lines can be automatically provided for the 3D printer, printing of three-dimensional objects with various colors or various materials is realized, and the redundant material lines after material returning can be automatically wound on the material tray 400, so that the neatness around the material tray 400 is maintained. Meanwhile, the supporting shaft assembly 310 can reduce friction when the material plate rotates, and feeding and discharging are facilitated. Also, since the support shaft assembly 310 is supported by the rim 410 of the tray 400, the tray 400 may be mounted to the refueling mechanism by gravity only, without other complicated mounting structures. After the stockline is consumed, the tray 400 can be conveniently taken down from the material changing mechanism without disassembling other parts, and the replacement is convenient.

While the disclosure has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative and schematic and are not restrictive in character, the disclosure not being limited to the disclosed embodiments. Variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed subject matter, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps than those listed and the indefinite article "a" or "an" does not exclude a plurality, and the term "plurality" means two or more. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Reference numerals illustrate:

100 parts of a bracket, 110 parts of an arc-shaped groove;

120, a separator 130, a desiccant tank;

140, a top cover, 150, an air hole;

200, a material guiding unit and 210, a sub material guiding pipe;

220, a material guiding port 240, a multi-way piece;

300, a material changing unit 310, a supporting shaft assembly;

311 is a first support shaft group, 3111 is a first support shaft;

3112 gears 3113 connecting shafts;

312, a second support shaft set 3121, a second support shaft;

320 parts of feeding and discharging mechanisms and 321 parts of channels;

400, a tray, 410, a rim;

500, a humidity sensor, 600, an identification sensor;

700 parts of bottom shell and 800 parts of cover body.

Claims (19)

1. A 3D printing system, the 3D printing system comprising:

a 3D printer;

a multipass member having an outlet and a plurality of inlets in communication with the outlet, wherein the outlet is connected to the 3D printer;

The device comprises a plurality of material changing units, a plurality of material loading and unloading mechanisms, a plurality of material unloading units and a plurality of material unloading units, wherein each material changing unit comprises a supporting shaft assembly and a material loading and unloading mechanism, the supporting shaft assembly is in force transmission contact with the rim of a corresponding material tray in the plurality of material trays, and a channel for penetrating a material line is arranged in the material loading and unloading mechanism, and the material line is wound on the corresponding material tray;

The plurality of sub-guide pipes are positioned below the plurality of trays, each sub-guide pipe is connected with one inlet of the multi-pass piece, and each sub-guide pipe is connected with a corresponding channel, so that a material line of each tray extends into one corresponding sub-guide pipe through the corresponding channel.

2. The 3D printing system according to claim 1, wherein the support shaft assembly includes a first support shaft group and a second support shaft group, the first support shaft group and the second support shaft group being spaced apart from each other in a circumferential direction of the respective trays, and the loading and unloading mechanism is provided at a side of the first support shaft group facing away from the second support shaft group;

one end of each sub-guide pipe far away from the corresponding channel is connected with one inlet of the multi-pass piece through the middle area of the second supporting shaft group.

3. The 3D printing system of claim 1, wherein an end of each sub-feed tube is engaged with a respective channel and an end of each sub-feed tube remote from the respective channel is connected to one inlet of the manifold.

4. A 3D printing system according to any of claims 1-3, wherein a line sensor is provided inside the multipass member.

5. A 3D printing system according to any of claims 1-3, wherein an auxiliary extrusion wheel is provided inside the multipass part.

6. The 3D printing system of claim 1, wherein an outlet of the multipass member engages a main conduit of the 3D printer.

7. The 3D printing system of claim 1, further comprising an identification sensor and a circuit board disposed between two adjacent trays, wherein the identification sensor is disposed on the circuit board.

8. The 3D printing system of claim 1, wherein the 3D printing system further comprises a bracket, the support shaft assembly rotatably coupled to the bracket;

The bracket is provided with an arc-shaped groove extending along a preset direction, and the preset direction is the arrangement direction of the plurality of trays.

9. The 3D printing system of claim 1, further comprising a bracket, the support shaft assembly rotatably coupled to the bracket;

At least one partition is provided on a surface of the holder facing the plurality of trays, the at least one partition being disposed at intervals in an arrangement direction of the plurality of trays to divide the holder into a plurality of segments, each segment for at least partially accommodating a corresponding one of the plurality of trays.

10. The 3D printing system according to claim 1, wherein the loading and unloading mechanism is configured to drive a stock line wound on the corresponding tray to be led into the multipass member through a corresponding sub-feed pipe of the plurality of sub-feed pipes to perform a loading operation, and to drive the corresponding tray to rotate such that the stock line withdrawn from the multipass member via a feed guiding unit is wound back onto the corresponding tray to perform a unloading operation.

11. The 3D printing system of claim 2, wherein the first axis of rotation of the first set of support shafts, the second axis of rotation of the second set of support shafts, and the axes of rotation of the respective trays are parallel to each other.

12. The 3D printing system of claim 2, wherein the first support shaft set comprises two first support shafts arranged along a first rotation axis such that circumferential surfaces of the two first support shafts are in contact with two rims of the respective tray, respectively, when the respective tray is mounted in a refueling mechanism.

13. 3D printing system according to claim 11 or 12, wherein the end of the respective sub-feed tube that engages the channel is arranged adjacent to a middle portion of the first set of support shafts along the first axis of rotation.

14. The 3D printing system of claim 1, wherein an end of the channel facing away from the respective sub-feed tube is flared.

15. The 3D printing system according to claim 8, wherein at least one desiccant tank for containing a desiccant is provided on a surface of the support facing the plurality of trays, a top cover is detachably mounted at an opening of each desiccant tank, and a plurality of ventilation holes are provided on the top cover.

16. The 3D printing system of claim 15, wherein at least one divider is provided on a surface of the support facing the plurality of trays, the divider and the respective desiccant channels being located on respective sides of the support, wherein the divider is provided on a side proximate the respective loading and unloading mechanism.

17. The 3D printing system of claim 16, wherein the at least one divider is spaced apart in an arrangement direction of the plurality of trays to divide the stand into a plurality of segments;

The length of the opening of the desiccant tank exceeds the length of each segment in the arrangement direction of the plurality of trays.

18. The 3D printing system of claim 1, wherein the support shaft assembly comprises at least one first support shaft having a gear disposed thereon;

The feeding and discharging mechanism drives the gear to rotate and drives the at least one first supporting shaft to rotate.

19. The 3D printing system of claim 1, further comprising a humidity sensor mounted in a circuit board on the back of the support.