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WO2018139566A1 - Matrice de moulage - Google Patents

Matrice de moulage Download PDF

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Publication number
WO2018139566A1
WO2018139566A1 PCT/JP2018/002396 JP2018002396W WO2018139566A1 WO 2018139566 A1 WO2018139566 A1 WO 2018139566A1 JP 2018002396 W JP2018002396 W JP 2018002396W WO 2018139566 A1 WO2018139566 A1 WO 2018139566A1
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WO
WIPO (PCT)
Prior art keywords
mold
insert
molding die
die
nest
Prior art date
Application number
PCT/JP2018/002396
Other languages
English (en)
Japanese (ja)
Inventor
三浦慎吾
井出徹
森浦智也
宮岡哲也
江藤拓也
Original Assignee
本田技研工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to CN201880008860.6A priority Critical patent/CN110248793B/zh
Priority to JP2018564641A priority patent/JP6741354B2/ja
Publication of WO2018139566A1 publication Critical patent/WO2018139566A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould

Definitions

  • the present invention relates to a molding die for producing a molded product by injection molding by accommodating a nest inside.
  • the molding die disclosed in Japanese Patent No. 4503351 includes a plurality of cavities and through passages communicating with the cavities on the back side of the cavities of the fixed side mold and the movable side mold.
  • the heat medium (high temperature water, low temperature water) is configured to flow through the cavity and the through passage. That is, the temperature of the molding die can be adjusted by flowing the heat medium.
  • a nesting may be accommodated and fixed in a molding die, and the temperature may be partially (or entirely) adjusted by this nesting.
  • the temperature can be adjusted by providing a flow path for allowing the heat medium to flow inside the insert.
  • the present invention has been made in view of the above circumstances, and by making it possible to quickly adjust or maintain the temperature of the nesting with a simple configuration, energy saving at the time of injection molding can be achieved and the manufacturing cost can be reduced.
  • An object is to provide a molding die that can be reduced.
  • a molding die includes a first die and a second die that are clamped, and a nest disposed in the first die,
  • the nest can form a cavity into which the molding material flows between the second mold, and a contact portion that contacts the first mold in an expanded state due to an increase in temperature, and the expansion In this state, a non-contact portion that forms a gap with the first mold to be non-contact, and extends from the opposite end surface where the cavity is formed to the vicinity of the cavity, and the cavity And a non-communication hollow portion.
  • the molding die can satisfactorily position the first die and the insert by the contact portion of the insert, and can accurately form the cavity.
  • a gap is formed between the first mold and the non-contact portion of the insert, so that heat conduction between the insert and the first mold is well suppressed due to the heat insulating effect of the gap. Is done.
  • the insert since the insert includes a hollow portion, the hollow portion also has a heat insulating effect. Therefore, the temperature of the nesting can be maintained with a simple configuration, and energy for adjusting the nesting temperature can be saved during injection molding. As a result, the manufacturing cost when manufacturing a molded product is reduced.
  • the nesting includes a plurality of the hollow portions with a wall portion interposed therebetween.
  • the mold for molding has a plurality of hollow portions, so that the heat insulating effect of the insert can be further enhanced while maintaining the shape of the insert.
  • the first mold has an accommodation space for accommodating the insert, and the gap is located on the back side of the accommodation space with respect to the abutting portion, and around the inner peripheral surface constituting the accommodation space. It may be formed over the entire circumference.
  • the molding die can maintain the shape of the cavity with higher accuracy by arranging the contact portion near the opening of the accommodation space. Further, since the gap is formed over the entire circumference in the circumferential direction of the inner peripheral surface of the first mold, it is possible to greatly reduce the energy required for adjusting the temperature of the nest.
  • a heat insulating member may be provided between the insert and the first mold.
  • the molding die can further suppress the conduction of heat to the first die by the heat insulating member.
  • the insert includes a flow passage through which a heat medium for adjusting the temperature of the insert itself is circulated, and the heat passage can remove the heat medium as necessary.
  • the nesting can adjust the temperature of the nesting itself quickly by the flow path. Moreover, the flow path can exhibit a heat insulating effect by removing the heat medium, similarly to the hollow portion.
  • the flow passage is provided at least in a molded meat portion constituting the cavity on the second mold side with respect to the hollow portion.
  • the temperature of the nest formed meat part is adjusted smoothly by the heat medium, so that an appropriate temperature can be applied to the molding material injected into the cavity.
  • the flow passage may be formed so as to extend between the gap and the hollow portion and communicate with a flow passage provided in the molded meat portion.
  • the flow path extends between the gap and the hollow part, it can exhibit a heat insulating effect around the flow path, suppress the temperature change, and allow the heat medium to flow well.
  • the heat medium may include a refrigerant, and the flow path may be configured as a cooling mechanism that cools the insert during injection molding.
  • the molding die can easily cool the nest by a cooling mechanism that causes the refrigerant to flow in the flow path, and can favorably promote solidification of the molding material.
  • the flow passages are grouped for each nested part, and the heat medium can be circulated for each part.
  • ⁇ Molding molds can be adjusted in detail according to the part of the molded product because the flow passages are grouped by nesting part.
  • the first mold is provided with a driven nest that partially closes the gap and is configured to be displaceable by a separate member from the nest, and the driven nest continues to close the gap. It is preferable to allow thermal expansion and contraction of the nest.
  • the molding die has a driven nest so that it is possible to satisfactorily prevent the molding material from entering the gap while allowing thermal expansion of the nest.
  • the molding die can adjust or maintain the temperature of the nesting quickly with a simple configuration, thereby saving energy during injection molding and reducing manufacturing costs. .
  • a molding die 10 is a molding die for injection molding a vehicle cowl (molded product), and is provided in an injection molding apparatus 12 as shown in FIG.
  • directions are indicated based on directions of arrows X, Y, and Z in FIG. 1 as necessary.
  • the arrow X direction is the left-right direction in FIG. 1
  • the arrow Y direction is the front-rear direction in FIG. 1
  • the arrow Z direction is the up-down direction in FIG.
  • the molding die 10 has a fixed die 14 (second die), a movable die 16 (first die), and a nesting 18 as main components.
  • the nest 18 has a function of adjusting the temperature of the nest 18 itself, and is attached to the movable die 16 to construct a cavity 20 with the fixed die 14 as the movable die 16 moves.
  • a molded product is molded by injecting a molding material into the cavity 20.
  • the cowl which is a molded product, has a predetermined length in the longitudinal direction (arrow Z direction) and the width direction (arrow Y direction) of the vehicle, and has a sufficient length in the height direction (arrow X direction). It is formed into a shape. Therefore, the molding die 10 also has a sufficient length in the arrow X direction.
  • the molded product produced by the molding die 10 is not limited to a cowl.
  • the shape of the mold cavity 20 may be designed as appropriate according to the shape of the molded product.
  • the injection molding apparatus 12 has a mold clamping mechanism 22 for clamping the molding die 10.
  • the mold clamping mechanism 22 supports the fixed mold 14 by a fixed plate 24, while the movable mold 16 is moved by a movable plate 26. Support by.
  • the fixed platen 24 is firmly fixed to a support body (not shown) provided in the injection molding device 12 so that the fixed die 14 is disposed opposite to the movable die 16.
  • the movable plate 26 is connected and fixed to a movable actuator 28.
  • the movable actuator 28 operates based on the control of the control unit 30 of the injection molding device 12 to reciprocate the movable plate 26 and the movable mold 16 in the arrow X direction.
  • the movable mold 16 moves relative to the fixed mold 14 in the direction of the arrow X1
  • the movable mold 16 and the fixed mold 14 approach and come into contact (clamping).
  • the mold clamping between the movable mold 16 and the fixed mold 14 is released, and the movable mold 16 is separated from the fixed mold 14.
  • the injection molding apparatus 12 has an injection mechanism 32 that injects a molding material toward the cavity 20.
  • the injection mechanism 32 includes an injection nozzle 34 that is inserted through the fixed platen 24 and communicates with the spool 40 of the fixed mold 14. Further, the injection mechanism 32 is provided with a hopper, a heater, a screw and the like (not shown). This injection mechanism 32 supplies the molding material from the hopper to the injection nozzle 34 under the control of the control unit 30 and moves the molding material under the rotational drive of the screw in the injection nozzle 34 while heating and melting the molding material by the heater. . Thereby, the injection nozzle 34 injects the molding material from the tip.
  • the injection mechanism 32 may adopt other configurations.
  • the fixed die 14 of the molding die 10 constitutes one surface of the cavity 20 as described above.
  • the fixed die 14 includes a base portion 36 connected to the fixed platen 24, and a convex portion 38 that is continuous with the base portion 36 and protrudes from the base portion 36 toward the movable die 16 (in the direction of the arrow X2).
  • the base portion 36 is formed in a block shape having a predetermined thickness, and spreads outward (in the direction of arrows YZ) from the convex portion 38 in a front view as viewed from the movable mold 16 side.
  • a surface (surface around the convex portion 38) facing the movable mold 16 in the base portion 36 constitutes a partition surface 36 a that is a boundary reference of the molding die 10.
  • the partition surface 36a of the base portion 36 is provided with a guide pin bush 36b for guiding and positioning the mold clamping of the molding die 10 in cooperation with a guide pin 56 described later.
  • a spool 40, a runner 42, and a gate 44 are provided inside the base portion 36. The spool 40 communicates between the cavity 20 and the injection nozzle 34 and supplies a molten metal of molding material.
  • the convex portion 38 of the fixed die 14 is formed so as to protrude according to the shape of the molded product, and faces the insert 18 accommodated in the movable die 16. That is, a mold shape that forms one surface of the molded product is formed on the surface of the convex portion 38 (portion protruding from the partition surface 36a).
  • the fixed die 14 has an ejector mechanism for taking out the injection molded product from the fixed die 14.
  • the ejector mechanism may be provided in the movable mold 16 or the insert 18.
  • the movable die 16 of the molding die 10 is formed in a concave shape having an accommodating space 16a for accommodating the insert 18.
  • the movable mold 16 includes a bottom wall 46 fixed to the movable platen 26 and side walls 48 projecting from the four sides of the bottom wall 46 in the direction of the arrow X1, and has a box shape as a whole. Yes.
  • the movable mold 16 is provided with a driven insert 50 that is configured as a member different from the insert 18 and that operates based on the expansion of the insert 18.
  • a fixing member 52 such as a bolt for fixing the insert 18 is provided on the bottom wall 46 of the movable mold 16. Further, a heat insulating plate 54 (heat insulating member) is provided on the surface of the bottom wall 46 facing the accommodation space 16a.
  • the side wall 48 circulates around the accommodation space 16 a, and the end surface of the protruding end (the end opposite to the bottom wall 46) constitutes a partition surface 48 a that faces the partition surface 36 a of the fixed mold 14. .
  • the side wall 48 is provided with a plurality of guide pins 56 that protrude from the partition surface 48a in the direction of the arrow X1.
  • the fixed member 52 penetrates through the bottom wall 46 and the heat insulating plate 54 of the movable mold 16 and connects and holds the insert 18.
  • the molding die 10 takes into account the degree of expansion of the insert 18 due to heating during injection molding, and the fixing member 52 functions as a base point when the insert 18 is expanded.
  • the heat insulating plate 54 is arranged and fixed between the movable mold 16 (bottom wall 46) and the insert 18 to suppress heat conduction between the bottom wall 46 and the insert 18.
  • the heat insulating plate 54 is formed in a flat shape, and holes for passing the fixing member 52 and flow passages 68 and 74 described later are provided at appropriate positions on the plate surface.
  • the material of the heat insulation plate 54 is not specifically limited, For example, it is good to be comprised with the ceramic (porous body) which has a bubble, the material with low heat conductivity, etc.
  • the guide pin 56 protrudes short from the partition surface 48a of the movable die 16 and is inserted into the guide pin bush 36b on the fixed die 14 side when the fixed die 14 and the movable die 16 are closed. This prevents the fixed mold 14 and the movable mold 16 from being displaced in the arrow YZ direction, and the molded product is molded with high accuracy.
  • the insert 18 of the molding die 10 is inserted and fixed in the accommodation space 16a, so that the insert 18 is disposed and fixed at a position opposite to the convex portion 38 of the fixed die 14.
  • the insert 18 has a sufficient thickness from the bottom wall 46 toward the fixed mold 14 in order to form a molded product having a predetermined height as described above.
  • the thickness of the insert 18 corresponds to the protruding length of the movable die 16 (side wall 48), and the peripheral portion 58 near the side wall 48 protrudes from the bottom wall 46 until it coincides with the partition surface 48a.
  • the portion inside the peripheral portion 58 is recessed from the partition surface 62a to the bottom wall 46 side corresponding to the shape of the convex portion 38 of the fixed mold 14.
  • the peripheral portion 58 of the insert 18 is in contact with the inner peripheral surface of the side wall 48 in the expanded state due to the temperature rise of the insert 18 in the vicinity of the opening of the movable die 16 (arrow X1 direction side).
  • the peripheral portion 58 of the insert 18 is provided with a non-contact portion 58b that is not in contact with the inner peripheral surface of the side wall 48 even in the expanded state due to the temperature increase of the insert 18 on the back side of the accommodation space 16a than the contact portion 58a.
  • a part of the insert 18 forms a gap 60 with respect to the movable mold 16.
  • the insert 18 is functionally divided into a molded meat portion 62 and a meat removal portion 64 along its thickness direction (arrow X direction).
  • the molded meat part 62 is a part directly facing the fixed mold 14 at a position away from the bottom wall 46.
  • the molded meat portion 62 has a sufficient thickness capable of maintaining the cavity 20 during injection molding, and continues in a series in a substantially arrow YZ direction orthogonal to the thickness direction while maintaining the thickness.
  • the outer portion of the molded meat portion 62 in the direction of the arrow YZ constitutes the contact portion 58a and is fixed in contact with the inner peripheral surface of the side wall 48.
  • the molded meat portion 62 includes a partition surface 62a in the vicinity of the contact portion 58a on the surface facing the fixed mold 14.
  • the molded meat portion 62 is recessed inward in the direction of the arrow X2 from the partition surface 62a to form a concave space 63 into which the convex portion 38 of the fixed mold 14 enters.
  • a part of the molded meat portion 62 comes into contact with the fixed mold 14 when the movable mold 16 and the fixed mold 14 are clamped. More specifically, the partition surface 62 a contacts the partition surface 36 a of the base portion 36 of the fixed mold 14, thereby forming the cavity 20 inside thereof. That is, the surface facing the fixed mold 14 on the inner side of the partition surface 62 a of the molded meat portion 62 constitutes one surface of the cavity 20.
  • the abutment scheduled portion 62b set at a substantially central location other than the partition surface 62a comes into contact with the surface of the convex portion 38 of the fixed mold 14 to change the shape of the cavity 20. Maintain each other.
  • a plurality of flow paths 68 for allowing the heat medium to flow are provided inside the formed meat portion 62 as a temperature adjusting mechanism 66 (including a cooling mechanism).
  • the plurality of flow passages 68 communicate with flow passages 74 provided in the lightening portions 64 described later, and the heat medium is supplied and discharged. Examples of the heat medium include temperature-adjusted water and oil.
  • each flow path 68 will also be in a vacuum state (or the state where the air which stopped the flow exists) by recovering a heat medium.
  • the plurality of flow passages 68 extend in the direction of the arrow YZ in the molded meat portion 62, and the temperature of the molded meat portion 62 (particularly closer to the cavity 20) can be intensively adjusted. Further, the plurality of flow paths 68 are grouped for each part of the formed meat portion 62 so that the heat medium is supplied and discharged for each part. As a result, the molded meat portion 62 can be temperature-adjusted particularly for a portion (for example, the abutting scheduled portion 62b) that is desired to be cooled or heated.
  • the plurality of flow passages 68 may be provided separately into a high-temperature flow passage for flowing a high-temperature heat medium (heat medium) and a low-temperature flow passage for flowing a low-temperature heat medium (refrigerant).
  • the thinned portion 64 of the insert 18 is provided between the molded meat portion 62 and the bottom wall 46, and has a plurality of hollow portions 70 from which the meat of the insert 18 itself is extracted. . That is, the thinned portion 64 of the insert 18 corresponds to a portion having the hollow portion 70 in the arrow X direction, and conversely, the molded meat portion 62 corresponds to a portion where the hollow portion 70 is not present.
  • the outer peripheral portion of the thinned portion 64 in the arrow YZ direction is cut out more inside than the outer peripheral portion (the contact portion 58a) of the molded meat portion 62 in the arrow YZ direction. That is, the outer peripheral portion of the lightening portion 64 constitutes a non-contact portion 58 b that is non-contact with the side wall 48 in the accommodated state of the movable die 16.
  • the cutout (non-contact portion 58 b) of the lightening portion 64 is provided over the entire circumference in the circumferential direction of the inner peripheral surface of the side wall 48. Of course, a part of the lightening portion 64 may be in contact with the side wall 48.
  • the plurality of hollow portions 70 are provided in a matrix in the direction of the arrow YZ and are not in communication with the cavity 20.
  • a total of nine hollow portions 70 are provided in three rows in the arrow Y direction and three columns in the arrow Z direction.
  • each hollow portion 70 is different from each other in the direction of the arrow X in accordance with the shape of the molded meat portion 62 from the end face 64a opposite to the molded meat portion 62 (so as to ensure the thickness of the molded meat portion 62). Has depth. More specifically, the hollow portion 70 is formed deep in the bottom and in the arrow YZ direction when the thickness of the entire insert 18 is long in the X direction based on the shape of the cavity 20. On the other hand, when the thickness of the entire insert 18 is short in the X direction, the hollow portion 70 is formed to be shallow and small in the arrow YZ direction.
  • the block wall portion 72 of the lightening portion 64 that partitions the plurality of hollow portions 70 is designed to have a shape that can sufficiently obtain the strength of the insert 18 in the arrow X direction even when there are the plurality of hollow portions 70. .
  • the block wall 72 is formed to be wide in the direction of the arrow YZ at a portion where the hollow portion 70 is shallow (near the center in the direction of the arrow YZ), and the portion where the hollow portion 70 is deep (the outer peripheral portion in the direction of the arrow YZ). In the direction of the arrow YZ.
  • the block wall 72 is provided with a plurality of flow passages 74 for allowing the heat medium to flow as the temperature adjusting mechanism 66.
  • the plurality of flow passages 74 extend from the end face 64 a of the thinned portion 64 in the direction of the arrow X and communicate with appropriate flow passages 68 (for example, in group units) of the formed meat portion 62.
  • the flow passages 68 and 74 of the molded meat portion 62 and the block wall portion 72 constitute a circulation circuit for circulating the heat medium.
  • the plurality of flow passages 74 extend between the gap 60 and the hollow portion 70, respectively. Therefore, each flow path 74 exhibits a heat insulating effect around it, suppresses a temperature change, and causes the heat medium to flow.
  • the flow passage 74 of the block wall portion 72 communicates with the communication passage 76 of the movable die 16 through the hole of the heat insulating plate 54.
  • the communication path 76 is connected to a pipe 78 communicating with a heat medium source 80 provided outside the movable mold 16.
  • the heat medium source 80 supplies a heat medium (heat medium, refrigerant) having an appropriate temperature to the flow paths 68 and 74, and collects the heat medium existing in the flow paths 68 and 74. It has a function.
  • the insert 18 (the formed meat portion 62 and the meat removal portion 64) includes a plurality of holes 82 smaller than the hollow portion 70 in addition to the hollow portion 70.
  • the plurality of holes 82 can further improve the heat insulating property of the insert 18.
  • the formation location, number, and shape of the hole 82 may be arbitrarily designed according to the shape and strength of the insert 18.
  • the side wall 48 of the movable mold 16 and a part of the molded meat portion 62 of the insert 18 are provided with a tapered portion 84 for arranging the driven insert 50.
  • the driven nest 50 has a function of suppressing damage to the nest 18 by displacing the nest 18 with the thermal expansion and allowing the thermal expansion.
  • the driven nest 50 is only shown between the movable die 16 in the arrow Z direction and the nest 18, but the driven nest 50 is connected to the movable die 16 in the arrow Y direction. It is preferable to arrange between 18.
  • the inclined surfaces formed in the tapered portion 84 and the driven nest 50 are in contact with each other.
  • the tapered end of the driven nest 50 is connected to the stepped portion of the movable mold 16 via the elastic member 86, while the tapered end of the driven nest 50 is connected to the runner 42 of the fixed mold 14.
  • the driven insert 50 is formed of a material such as stainless steel that has a lower thermal conductivity than the insert 18 or the movable die 16.
  • the gap 60 between the side wall 48 and the lightening part 64 (non-contact part 58b) and the runner 42 are always closed. That is, when the insert 18 is thermally expanded in the direction of the arrow YZ, the driven insert 50 slides along the inclined surface and is pushed out to the runner 42 side. Therefore, the gap 60 and the runner 42 are kept closed while allowing the thermal expansion of the insert 18.
  • the insert 18 is cooled and contracted, the restoring force of the elastic member 86 causes the driven insert 50 to slide along the inclined surface and be pulled back to the elastic member 86 side. Also at this time, the driven nest 50 is in contact with the movable mold 16 and the nest 18 and continues to close the gap 60 and the runner 42.
  • the molding die 10 according to the present embodiment is basically configured as described above, and the effects thereof will be described below.
  • the injection molding apparatus 12 having the molding die 10 is arranged at a position where the movable mold 16 and the fixed mold 14 are separated before injection molding of a molded product.
  • the controller 30 heats the insert 18 by supplying a heat medium having a predetermined temperature (above the melting temperature of the molding material) to the flow path 68 of the insert 18.
  • the insert 18 is thermally expanded by this heating, the stress of thermal expansion is caused by the driven insert 50 being advanced to the runner 42 side while the contact portion 58a of the molded meat portion 62 is fixed to the side wall 48 of the movable die 16. Is suppressed.
  • the control unit 30 controls the drive of the movable actuator 28, moves the movable mold 16 toward the fixed mold 14, and performs mold clamping.
  • the partition surface 36a of the fixed mold 14 is brought into contact with the partition surfaces 48a and 62a of the movable mold 16 and the insert 18, and the cavity 20 is formed inside thereof.
  • the insert 18 receives a pressing force between the fixed mold 14 and the movable mold 16, but the thinned portion 64 has an appropriate strength to support the molded meat portion 62, so that the cavity 20 The shape can be kept good.
  • the injection molding apparatus 12 injects the molten molding material into the cavity 20 from the injection nozzle 34 of the injection mechanism 32 through the spool 40, the runner 42, and the gate 44.
  • the control unit 30 cools the insert 18 by supplying a coolant having a predetermined temperature or less to the flow path 68 of the insert 18. As a result, the temperature of the insert 18 decreases and contracts.
  • the flow path 74 in the block wall portion 72 is thermally insulated by the hollow portion 70 and the hole 82 provided around the flow passage 74. Therefore, the refrigerant is supplied in the flow passage 68 of the molded meat portion 62 with the temperature rise suppressed, and the insert 18 can be cooled effectively.
  • the injected molding material is solidified and a molded product is molded.
  • the temperature of the insert 18 reaches a predetermined temperature, the refrigerant is recovered from the flow passages 68 and 74, and further, the mold is opened by moving the movable mold 16 in the direction of the arrow X2. Thereafter, when the molded product is taken out by the ejector mechanism and injection molding is performed again, the same operation as described above is repeated.
  • the movable mold 16 and the insert 18 can be favorably positioned by the contact portion 58a of the insert 18, and the cavity 20 can be accurately formed. it can. Further, by forming a gap 60 between the movable mold 16 in the expanded state by the non-contact portion 58b of the insert 18, heat conduction between the insert 18 and the movable mold 16 due to the heat insulating effect of the gap 60. Can be suppressed satisfactorily. Furthermore, since the insert 18 includes the hollow portion 70, the hollow portion 70 also has a heat insulating effect. Therefore, the temperature change of the insert 18 can be suppressed, and energy for adjusting the temperature of the insert 18 can be saved during injection molding. As a result, the manufacturing cost at the time of manufacturing a molded product can be reduced.
  • the molding die 10 includes the plurality of hollow portions 70, whereby the heat insulating effect of the insert 18 can be further enhanced. Further, the molding die 10 can maintain the shape of the cavity 20 with higher accuracy by arranging the contact portion 58a near the opening of the accommodation space 16a. Further, since the gap 60 is formed over the entire circumference in the circumferential direction of the inner peripheral surface of the movable mold 16 (side wall 48), the heat insulation effect is increased and the energy required for temperature adjustment of the insert 18 can be greatly reduced. . Furthermore, the molding die 10 can further suppress the conduction of heat to the movable die 16 by the heat insulating plate 54.
  • the insert 18 can easily change the temperature of the insert 18 itself by the flow passages 68 and 74, and the heat passage is removed from the flow passages 68 and 74 in the same manner as the hollow portion 70. Can be achieved.
  • the molded meat portion 62 of the insert 18 can give an appropriate temperature to the molding material injected into the cavity 20 by smoothly adjusting the temperature with a heat medium with little temperature change.
  • the temperature adjusting mechanism 66 makes it possible to easily cool the insert 18 by causing the refrigerant to flow into the flow path 68 as a heat medium, and can favorably promote solidification of the molding material.
  • the nest 18 may be provided not only on the movable die 16 but also on the fixed die 14.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

La présente invention concerne une matrice de moulage (10) pourvue d'une matrice fixe (14), d'une matrice mobile (16) et d'une chemise (18). La chemise (18) est apte à former, conjointement avec la matrice fixe (14), une cavité (20) dans laquelle s'écoule un matériau de moulage. En outre, la chemise (18) comporte : une partie de contact (58a) qui est en contact avec la matrice mobile (16) dans un état déployé; et une partie sans contact (58b) qui forme un espace (60) conjointement avec la matrice mobile (16), et qui n'est pas en contact avec cette dernière. De plus, la chemise (18) s'étend à partir d'une surface d'extrémité (64a) du côté opposé à l'endroit où la cavité (20) est formée, jusqu'à une position au voisinage de la cavité (20), et comporte des sections creuses non communicantes (70) disposées dans la cavité (20).
PCT/JP2018/002396 2017-01-27 2018-01-26 Matrice de moulage WO2018139566A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201880008860.6A CN110248793B (zh) 2017-01-27 2018-01-26 成型用模具
JP2018564641A JP6741354B2 (ja) 2017-01-27 2018-01-26 成形用金型

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-013225 2017-01-27
JP2017013225 2017-01-27

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Publication Number Publication Date
WO2018139566A1 true WO2018139566A1 (fr) 2018-08-02

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PCT/JP2018/002396 WO2018139566A1 (fr) 2017-01-27 2018-01-26 Matrice de moulage

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JP (1) JP6741354B2 (fr)
CN (1) CN110248793B (fr)
WO (1) WO2018139566A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
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CN114309477A (zh) * 2021-12-31 2022-04-12 东莞市润华铝业有限公司 一种散热器成型模具
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