In-mold assembly injection mold

Abstract

This invention discloses an in-mold assembly injection mold, comprising a moving mold and a fixed mold. The moving mold has a moving mold turntable embedded within it, and the moving mold turntable has two first cores. One side of the turntable has a moving mold insert integrated with the moving mold, and the moving mold insert has a second core. The fixed mold has a fixed mold turntable embedded within it, and the fixed mold turntable has two first cavities. One side of the fixed mold has a fixed mold insert integrated with the fixed mold, and the fixed mold insert has a second cavity. A moving mold turntable driving device is located on the side of the moving mold opposite to the fixed mold, driving the two first cores to interchange positions. A fixed mold turntable driving device is located on the side of the fixed mold opposite to the moving mold, driving the two first cavities to interchange positions. This invention allows for the molding of two product parts after mold closing. After the two product parts synchronously change positions and overlap, a third product part is then injection molded, achieving in-mold molding and assembly, reducing equipment investment, minimizing floor space, shortening the production process, and significantly improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of mold manufacturing, and in particular to an in-mold assembly injection mold. Background Art

[0002] The combined structure of automotive plastic parts needs to be injection molded separately and then assembled together. For example, parts A, B, and C need to be injection molded using three sets of molds. After molding, they are taken out of their respective molds and assembled together outside. Each part requires a separate mold to be made, which requires high equipment cost, large floor space, complex process, and low production efficiency. Therefore, the existing technology needs to be further improved. Summary of the invention

[0003] In view of the above-mentioned deficiencies of the prior art, the purpose of the present invention is to propose an in-mold assembly injection mold to solve the problems that each part of the automobile plastic assembly needs to be produced by a separate mold, the equipment cost investment is large, the floor space is large, the process is complicated, and the production efficiency is low.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] An in-mold assembly injection mold comprises a movable mold and a fixed mold, wherein the movable mold and the fixed mold are arranged opposite to each other, a movable mold turntable is provided on the movable mold, and a movable mold insert having an integral structure with the movable mold is provided on one side of the movable mold turntable.

[0006] The movable mold turntable is provided with two first cores with the same structure and arranged symmetrically in the center, and a second core is provided on the movable mold insert, and the three cores are arranged in a straight line.

[0007] A fixed mold turntable is arranged on the fixed mold, and the fixed mold turntable is a disc structure, and a fixed mold insert with an integrated structure with the fixed mold is arranged on one side of the fixed mold turntable.

[0008] The fixed mold turntable is provided with two first mold cavities with the same structure and arranged symmetrically in the center, and the fixed mold insert is provided with a second mold cavity, and the three mold cavities are arranged in a straight line.

[0009] The movable mold turntable is embedded in the movable mold. A movable mold turntable driving device is provided on the side of the movable mold away from the fixed mold. The movable mold turntable driving device drives the two first cores to exchange positions.

[0010] The fixed mold turntable is embedded in the fixed mold. A fixed mold turntable driving device is provided on the side of the fixed mold away from the movable mold. The fixed mold turntable driving device drives the two first cavities to exchange positions.

[0011] Furthermore, the second cavity can cooperate with any first core to form an injection cavity for product A, and product A remains on the movable mold turntable after molding.

[0012] The second core can cooperate with any first cavity to form an injection cavity for product C, and product C remains on the fixed mold turntable after molding.

[0013] Afterwards, the movable mold turntable and the fixed mold turntable are rotated 180 degrees, and the first core with product part A can cooperate with the first cavity with product part C to form an injection cavity for product part B. After molding, product part B forms the final product assembly with product parts A and C.

[0014] Furthermore, the movable mold turntable driving device includes a linear driving mechanism and a rotary mechanism. The linear driving mechanism includes a mounting plate, a first rotating shaft and a first oil cylinder. The mounting plate is arranged on the side of the movable mold away from the fixed mold, and the rotary mechanism is arranged on the mounting plate.

[0015] One end of the first rotating shaft is fixedly connected to the movable mold turntable, and the other end is rotatably connected to the mounting plate. The first oil cylinder is installed on the movable mold, and its piston rod is connected to the mounting plate, and drives the rotary mechanism and the movable mold turntable to move linearly.

[0016] Furthermore, the slewing mechanism includes a second oil cylinder, a first gear and a first rack, the first gear is mounted on the first rotating shaft, and the first rack is slidably matched with the mounting plate through a first slider.

[0017] The second oil cylinder is fixed on the mounting plate, the piston rod of the second oil cylinder is connected with the first rack, and drives the movable mold turntable to rotate through the first rotating shaft.

[0018] Furthermore, the fixed mold turntable driving device includes a second rotating shaft, a second gear, a second rack and a third oil cylinder. The second rotating shaft is arranged on the fixed mold, and one end of the second rotating shaft is fixedly connected to the fixed mold turntable.

[0019] The second gear is installed on the second rotating shaft, the second rack is located on one side of the second gear, and is slidably matched with the second slider and the fixed mold. The piston rod of the third oil cylinder is connected to the second slider, and the fixed mold turntable is driven to rotate through the second rotating shaft.

[0020] Furthermore, a turntable positioning mechanism is provided on the movable mold, and the turntable positioning mechanism includes a limit rod and two stoppers, and the two stoppers are respectively fixed on two opposite sides of the movable mold turntable and rotate with the movable mold turntable.

[0021] The limiting rod is located at a side of the movable mold turntable away from the movable mold insert, and one end of the limiting rod is fixedly connected to the movable mold.

[0022] Furthermore, two groups of movable mold upper ejector rods are arranged in the movable mold turntable, each group of movable mold upper ejector rods includes a plurality of movable mold upper ejector rods, and the two groups of movable mold upper ejector rods correspond to the positions of the two first cores respectively and are symmetrical with respect to the center.

[0023] Each ejector pin on the movable mold is located in a ejector pin mounting hole of the movable mold turntable, and a return spring is provided on the outer side thereof. The ejector pin mounting hole has a step extending inwardly, and the return spring drives the ejector pin on the movable mold to push against the step of the ejector pin mounting hole.

[0024] Furthermore, a push rod driving mechanism is provided on the side of the movable mold away from the fixed mold, and the push rod driving mechanism corresponds to the position of the first core located in the middle.

[0025] The ejector rod driving mechanism includes a first needle plate and a fourth oil cylinder. The fourth oil cylinder is installed on the outside of the movable mold, and its piston rod is connected to the first needle plate. The first needle plate is provided with movable mold lower ejectors that are equal in number to the upper ejectors of each group of movable molds and whose positions can correspond one to one.

[0026] Furthermore, two nylon locking buckles are symmetrically fixed on one side of the fixed mold turntable close to the movable mold, and the movable mold is provided with a locking sleeve corresponding to the nylon locking buckles fixed on the fixed mold.

[0027] Two fixed mold ejection mechanisms corresponding to the two first cavity positions are arranged inside the fixed mold turntable. The fixed mold ejection mechanism includes a second needle plate and a fixed mold ejector rod arranged on the second needle plate. One end of the fixed mold ejector rod is fixedly connected to the second needle plate, and the other end is located in the fixed mold turntable and slidably cooperates with it.

[0028] Two return rods are symmetrically arranged on each second needle plate, one end of each return rod is fixedly connected to the second needle plate, and the other end passes through the fixed mold turntable and is provided with the same nylon locking buckle. The movable mold is provided with a locking sleeve corresponding to the nylon locking buckles at the ends of the two return rods close to the fixed mold insert, and the nylon locking buckles at the ends of the two return rods away from the fixed mold insert are avoided on the movable mold side.

[0029] Furthermore, the outer side walls of the fixed mold turntable and the fixed mold turntable are both conical surfaces.

[0030] By adopting the above technical scheme, the beneficial technical effect of the present invention is as follows: the present invention arranges a movable mold turntable on the movable mold and a fixed mold turntable on the fixed mold, and first forms two product parts after the molds are closed, and the movable mold turntable drives one product part to change position, and the fixed mold turntable drives the other product part to change position, and after the positions of the two product parts overlap, the third product part is injected to achieve in-mold forming and assembly, reduce equipment investment, occupy a small area, shorten the production process, and greatly improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The present invention is a schematic diagram of the structural principle of an in-mold assembly injection mold.

[0032] Figure 2 The present invention is a structural schematic diagram of a movable mold part of an in-mold assembly injection mold.

[0033] Figure 3 yes Figure 2 A structural sectional view of the movable mold part is shown in FIG.

[0034] Figure 4 yes Figure 2 FIG. 1 is a schematic diagram of the structure of the movable mold part when the movable mold turntable is ejected.

[0035] Figure 5 yes Figure 2 The structural schematic diagram of a certain part shows the movable mold turntable and the rotating mechanism.

[0036] Figure 6 The present invention is a structural schematic diagram of a movable mold part of an in-mold assembly injection mold.

[0037] Figure 7 yes Figure 6 A structural schematic diagram of a certain part thereof shows a fixed mold turntable and a fixed mold turntable driving device.

[0038] Figure 8 yes Figure 6 A structural schematic diagram of another part shows the fixed mold turntable, fixed mold ejection mechanism and related components. DETAILED DESCRIPTION

[0039] The present invention is described in detail below in conjunction with the accompanying drawings:

[0040] Combination Figures 1 to 8 An in-mold assembly injection mold comprises a movable mold 1 and a fixed mold 2, the movable mold 1 and the fixed mold 2 are arranged opposite to each other, the movable mold 1 is provided with a movable mold turntable 11, and one side of the movable mold turntable 11 has a movable mold insert 12 with an integral structure with the movable mold 1. The movable mold turntable 11 has two first cores 13 with the same structure and arranged symmetrically, and the movable mold insert 12 is provided with a second core 14, and the three cores are arranged in a straight line. The movable mold turntable 11 is embedded in the movable mold 1, and a movable mold turntable driving device is provided on the side of the movable mold 1 away from the fixed mold 2, and the movable mold turntable driving device drives the two first cores 13 to exchange positions.

[0041] The fixed mold 2 is provided with a fixed mold turntable 21, which is a disc structure, and a fixed mold insert 22 with a structure integral with the fixed mold 2 is provided on one side thereof, and the fixed mold turntable 21 and the outer side wall of the fixed mold turntable 21 are both tapered surfaces. The fixed mold turntable 21 has two first cavities 23 with the same structure and central symmetry, and the fixed mold insert 22 is provided with a second cavity 24, and the three cavities are arranged in a straight line. The fixed mold turntable 21 is embedded in the fixed mold 2, and a fixed mold turntable driving device 6 is provided on the side of the fixed mold 2 away from the movable mold 1, and the fixed mold turntable driving device 6 drives the two first cavities to exchange positions.

[0042] The second cavity 24 can cooperate with any first core 13 to form an injection cavity for product A, and product A remains on the movable mold turntable 11 after molding. The second core 14 can cooperate with any first cavity 23 to form an injection cavity for product C, and product C remains on the fixed mold turntable 21 after molding. Afterwards, the movable mold turntable 11 and the fixed mold turntable 21 are both rotated 180°, and the first core 13 with product A can cooperate with the first cavity 23 with product C to form an injection cavity for product B, and product B, after molding, forms the final product assembly with product A and C.

[0043] The movable mold turntable driving device includes a linear drive mechanism 3 and a rotary mechanism 4. The linear drive mechanism 3 includes a mounting plate 31, a first rotating shaft 32 and a first oil cylinder 33. The mounting plate 31 is arranged on the side of the movable mold 1 away from the fixed mold 2, and the rotary mechanism 4 is arranged on the mounting plate 31. One end of the first rotating shaft 32 is fixedly connected to the movable mold turntable 11, and the other end is rotatably connected to the mounting plate 31. The first oil cylinder 33 is installed on the movable mold 1, and its piston rod is connected to the mounting plate 31, and drives the rotary mechanism 4 and the movable mold turntable 11 to move linearly.

[0044] The rotary mechanism 4 includes a second oil cylinder 41, a first gear 42 and a first rack 43. The first gear 42 is mounted on the first rotating shaft 32, and the first rack 43 is slidably matched with the mounting plate 31 through a first slider 44. The second oil cylinder 41 is fixed on the mounting plate 31, and the piston rod of the second oil cylinder 41 is connected to the first rack 43, and drives the movable mold turntable 11 to rotate through the first rotating shaft 32.

[0045] The movable mold 1 is provided with a turntable positioning mechanism 5, which includes a limit rod 51 and two stoppers 52. The two stoppers 52 are respectively fixed on opposite sides of the movable mold turntable 11 and rotate with the movable mold turntable 11. The limit rod 51 is located on the side of the movable mold turntable 11 away from the movable mold insert 12, one end of which is fixedly connected to the movable mold 1, and the other end is avoided on the fixed mold side. In the mold closing state, the limit rod 51 will not interfere with the fixed mold 2.

[0046] Two groups of movable mold upper ejector pins 15 are arranged in the movable mold turntable 11, and each group of movable mold upper ejector pins 15 includes a plurality of movable mold upper ejector pins 15. The two groups of movable mold upper ejector pins 15 correspond to the positions of the two first cores 13 and are symmetrical with each other. Each movable mold upper ejector pin 15 is located in a ejector pin mounting hole of the movable mold turntable 11, and a return spring 16 is arranged on the outside thereof. The ejector pin mounting hole has a step extending inward, and the return spring 16 drives the end of the movable mold upper ejector pin 15 away from the first core 13 to push against the step of the ejector pin mounting hole.

[0047] The movable mold 1 is provided with a push rod driving mechanism on the side away from the fixed mold 2, and the push rod driving mechanism corresponds to the position of the first core 13 located in the middle. The push rod driving mechanism includes a first needle plate 18 and a fourth oil cylinder 17, and the fourth oil cylinder 17 is installed on the outer side of the movable mold 1, and its piston rod is connected to the first needle plate 18. The first needle plate 18 is provided with movable mold lower push rods 19, which are equal in number to the upper push rods 15 of each group of movable molds and can correspond in position one by one.

[0048] The fixed mold turntable driving device 6 includes a second rotating shaft 61, a second gear 62, a second rack 63 and a third oil cylinder 64. The second rotating shaft 61 is arranged on the fixed mold 2, and one end thereof is fixedly connected to the fixed mold turntable 21. The second gear 62 is mounted on the second rotating shaft 61, the second rack 63 is located on one side of the second gear 62, and is slidably matched with the fixed mold 2 through the second slider, the piston rod of the third oil cylinder 64 is connected to the second slider 65, and the fixed mold turntable 21 is driven to rotate through the second rotating shaft 61.

[0049] Two nylon locking buckles 25 are symmetrically fixed on one side of the fixed mold turntable 21 close to the movable mold 1, and a locking sleeve corresponding to the nylon locking buckle 25 fixed on the fixed mold 2 is provided on the movable mold 1. Two fixed mold ejection mechanisms 7 corresponding to the positions of the two first cavities are provided inside the fixed mold turntable 21, and the fixed mold ejection mechanism 7 includes a second needle plate 71 and a fixed mold ejector rod 72 arranged on the second needle plate 71, one end of the fixed mold ejector rod 72 is fixedly connected to the second needle plate 71, and the other end is located in the fixed mold turntable 21 and slidably cooperates with it. When opening the mold, the movable mold 1 moves, and the fixed mold turntable 21 is pulled outward by 5mm through the nylon locking buckle 25, so that the fixed mold turntable 21 is separated from the fixed mold 2 by a certain distance, so as to avoid the friction resistance of the fixed mold 2 when the fixed mold turntable 21 rotates.

[0050] Two return rods are symmetrically arranged on each second needle plate 71, one end of each return rod is fixedly connected to the second needle plate 71, and the other end passes through the fixed mold turntable 21 and is provided with the same nylon locking buckle 25. The movable mold 1 is provided with a locking sleeve corresponding to the nylon locking buckle 25 at the ends of the two return rods close to the fixed mold insert 22, and the nylon locking buckle 25 at the ends of the two return rods away from the fixed mold insert 22 is avoided on the side of the movable mold 1. When opening the mold, the final product needs to stay in the movable mold 1 and move with the movable mold 1, the nylon locking buckle 25 on the return rod moves with the movable mold 1, and the return rod drives the second needle plate 71 and the fixed mold ejector 72 to move together, so that the final product is demolded from the fixed mold 2.

[0051] Parts not described in the present invention can be implemented by adopting or drawing on existing technologies.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0053] Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0054] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. An in-mold assembly injection mold, characterized in that: It comprises a movable mold and a fixed mold, the movable mold and the fixed mold are arranged opposite to each other, the movable mold is provided with a movable mold turntable, and one side of the movable mold turntable has a movable mold insert with an integral structure with the movable mold; The movable mold turntable is provided with two first cores with the same structure and arranged symmetrically in the center, and the movable mold insert is provided with a second core, and the three cores are arranged in a straight line; The fixed mold is provided with a fixed mold turntable, which is a disc structure, and one side of the fixed mold turntable is provided with a fixed mold insert with an integrated structure with the fixed mold; The fixed mold turntable has two first cavities with the same structure and arranged symmetrically in the center, and the fixed mold insert is provided with a second cavity, and the three cavities are arranged in a straight line; The movable mold turntable is embedded in the movable mold, and a movable mold turntable driving device is provided on the side of the movable mold away from the fixed mold, and the movable mold turntable driving device drives the two first cores to exchange positions; The fixed mold turntable is embedded in the fixed mold, and a fixed mold turntable driving device is provided on the side of the fixed mold away from the movable mold, and the fixed mold turntable driving device drives the two first cavities to exchange positions; The second cavity can cooperate with any first core to form an injection cavity for product A, and product A remains on the movable mold turntable after molding; The second core can cooperate with any of the first cavities to form an injection cavity for the product C, and the product C remains on the fixed mold turntable after molding; Afterwards, the movable mold turntable and the fixed mold turntable are rotated 180 degrees, and the first core with product part A can cooperate with the first cavity with product part C to form an injection cavity for product part B. After molding, product part B forms a final product assembly with product parts A and C. The fixed mold turntable driving device comprises a second rotating shaft, a second gear, a second rack and a third oil cylinder, wherein the second rotating shaft is arranged on the fixed mold, and one end thereof is fixedly connected to the fixed mold turntable; The second gear is mounted on the second rotating shaft, the second rack is located on one side of the second gear, and is slidably matched with the second slider and the fixed mold, the piston rod of the third oil cylinder is connected to the second slider, and drives the fixed mold turntable to rotate through the second rotating shaft; Two nylon locking buckles are symmetrically fixed on one side of the fixed mold turntable close to the movable mold, and the movable mold is provided with a locking sleeve corresponding to the nylon locking buckle fixed on the fixed mold; Two fixed mold ejection mechanisms corresponding to the positions of the two first cavities are arranged inside the fixed mold turntable, and the fixed mold ejection mechanism comprises a second needle plate and a fixed mold ejector rod arranged on the second needle plate, one end of the fixed mold ejector rod is fixedly connected to the second needle plate, and the other end is located in the fixed mold turntable and slidably cooperates with the second needle plate; Two return rods are symmetrically arranged on each second needle plate, one end of each return rod is fixedly connected to the second needle plate, and the other end passes through the fixed mold turntable and is provided with the same nylon locking buckle. The movable mold is provided with a locking sleeve corresponding to the nylon locking buckles at the ends of the two return rods close to the fixed mold insert, and the nylon locking buckles at the ends of the two return rods away from the fixed mold insert are avoided on the movable mold side.

2. The in-mold assembly injection mold according to claim 1, characterized in that: The movable mold turntable driving device includes a linear driving mechanism and a rotary mechanism, the linear driving mechanism includes a mounting plate, a first rotating shaft and a first oil cylinder, the mounting plate is arranged on the side of the movable mold away from the fixed mold, and the rotary mechanism is arranged on the mounting plate; One end of the first rotating shaft is fixedly connected to the movable mold turntable, and the other end is rotatably connected to the mounting plate. The first oil cylinder is installed on the movable mold, and its piston rod is connected to the mounting plate, and drives the rotary mechanism and the movable mold turntable to move linearly.

3. The in-mold assembly injection mold according to claim 2, characterized in that: The slewing mechanism comprises a second oil cylinder, a first gear and a first rack, wherein the first gear is mounted on the first rotating shaft, and the first rack is slidably matched with the mounting plate through a first slider; The second oil cylinder is fixed on the mounting plate, the piston rod of the second oil cylinder is connected with the first rack, and drives the movable mold turntable to rotate through the first rotating shaft.

4. The in-mold assembly injection mold according to claim 1, characterized in that: The movable mold is provided with a turntable positioning mechanism, which includes a limit rod and two stoppers, and the two stoppers are respectively fixed on opposite sides of the movable mold turntable and rotate with the movable mold turntable; The limiting rod is located at a side of the movable mold turntable away from the movable mold insert, and one end of the limiting rod is fixedly connected to the movable mold.

5. The in-mold assembly injection mold according to claim 1, characterized in that: Two groups of movable mold upper ejector rods are arranged in the movable mold turntable, each group of movable mold upper ejector rods includes a plurality of movable mold upper ejector rods, and the two groups of movable mold upper ejector rods correspond to the positions of the two first cores respectively and are symmetrical with each other; Each ejector pin on the movable mold is located in a ejector pin mounting hole of the movable mold turntable, and a return spring is provided on the outer side thereof. The ejector pin mounting hole has a step extending inwardly, and the return spring drives the ejector pin on the movable mold to push against the step of the ejector pin mounting hole.

6. The in-mold assembly injection mold according to claim 5, characterized in that: A push rod driving mechanism is provided on the side of the movable mold away from the fixed mold, and the push rod driving mechanism corresponds to the position of the first core located in the middle; The ejector rod driving mechanism includes a first needle plate and a fourth oil cylinder. The fourth oil cylinder is installed on the outside of the movable mold, and its piston rod is connected to the first needle plate. The first needle plate is provided with movable mold lower ejectors that are equal in number to the upper ejectors of each group of movable molds and whose positions can correspond one to one.

7. The in-mold assembly injection mold according to claim 1, characterized in that: The outer side walls of the fixed mold turntable and the fixed mold turntable are both conical surfaces.

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