In-mold assembly structure and plastic part

Abstract

The utility model relates to the technical field of molds, in particular to an in-mold assembly structure and a plastic part. The in-mold assembly structure comprises a bottom plate, a first mold, a second mold and a third mold, the third die is arranged on a rotatable bottom plate; the first mold, the second mold and the third mold can be closed together. The first mold comprises a first mold core and a first insert pin, and a first cavity is formed in the first mold core after the first mold core is closed; the second mold comprises a second mold core and a second insert pin; a second cavity, a third cavity and a fourth cavity which are communicated with one another are formed in the closed second mold core; the third mold comprises a third mold core and a third insert pin capable of extending out of the third mold core. The first cavity is used for forming a first joint, the second cavity is used for forming a second joint, and the fourth cavity is used for forming a third joint. After the first joint is formed on the third insert pin, the first joint extends into the third cavity, and the second joint and the third joint are formed on the first joint. The joint does not need to be manually assembled, and the production efficiency is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould technical field especially is a kind of moulding assembly structure and plastic part. BACKGROUND

[0002] The elbow joint, knee joint etc. of plastic doll toy usually use double joints, and these double joints are usually formed by injection molding process. The more common way on the market is to injection mold three joint components respectively, and then workers assemble these three joint components to form a complete plastic part. The production efficiency and assembly efficiency of this three joint components produced separately and then assembled by workers are very low.

[0003] For example, Chinese patent application No. CN202322229846.X discloses a toy silent movable joint structure. This kind of joint is first formed independently by each joint component, and then assembled together, and its production efficiency and assembly efficiency are low.

[0004] For example, Chinese patent application No. CN202020586350.1 discloses a rotating joint and a toy with the rotating joint. This kind of joint is also first formed independently by each joint component, and then assembled together, and its production efficiency and assembly efficiency are low. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the utility model provides a moulding assembly structure, which injection molds three joints together without assembly, has higher production efficiency, and overcomes the shortcomings of the prior art.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a moulding assembly structure, which includes a bottom plate, a first mold, a second mold and a third mold. The third mold is arranged on the rotatable bottom plate. The first mold and the second mold can be closed together with the third mold.

[0008] The first mold includes a first mold core and a first insert pin. The inside of the first mold core after being closed forms a first cavity. A first flow channel is arranged on the first mold core, and the first flow channel is communicated with the first cavity. The first insert pin can extend into the first cavity and block the first end of the first cavity.

[0009] The second mold includes a second mold core and a second insert pin. The inside of the second mold core after being closed forms a second cavity, a third cavity and a fourth cavity communicated with each other. A second flow channel and a third flow channel are arranged on the second mold core. The third cavity has the same structure as the first cavity. The second flow channel is communicated with the second cavity, and the third flow channel is communicated with the fourth cavity. The second insert pin can extend into the second cavity.

[0010] The third mold comprises a lower mold plate, a third mold core arranged on the lower mold plate, and a third pin capable of being extended from the third mold core;

[0011] The first cavity is used for forming the first joint, the second cavity is used for forming the second joint, and the fourth cavity is used for forming the third joint.

[0012] The first mold and the third mold are closed, the third pin is extended into the first cavity, and the first joint in the first cavity is formed on the third pin.

[0013] The second mold and the third mold are closed, and the first joint on the third pin is extended into the third cavity.

[0014] Preferably, the first mold further comprises a first nozzle plate, a first mounting plate, a first runner plate, and a first upper mold plate arranged in sequence; the first upper mold plate is provided with a first inclined pressing block, the lower mold plate is provided with a first groove, and the first groove is provided with an inclined block; and the first inclined pressing block can be pressed on the inclined block.

[0015] Preferably, the side surface of the first mold core is provided with a first inclined groove, and the first inclined groove is provided with a connecting block connected with the first inclined pressing block.

[0016] Preferably, the first mold further comprises a first ejector pin module, and the first ejector pin module is arranged on the first nozzle plate; a first ejector pin of the first ejector pin module ejects the first joint in the first cavity.

[0017] Preferably, the second mold further comprises a second nozzle plate, a second mounting plate, a second runner plate, and a second upper mold plate arranged in sequence; the second upper mold plate is provided with a second inclined pressing block, the lower mold plate is provided with a second groove, and the second groove is provided with an inclined block; and the second inclined pressing block can be pressed on the inclined block.

[0018] Preferably, the side surface of the second mold core is provided with a second inclined groove, and the second inclined groove is provided with a connecting block connected with the second inclined pressing block.

[0019] Preferably, the third mold further comprises a lower mold base and an ejector pin plate; the ejector pin plate is arranged on the lower mold base, an ejector pin is arranged on the ejector pin plate, and the ejector pin is used for ejecting the third mold core.

[0020] Preferably, the tip of the third pin is provided with at least two annular steps; the top of the annular step is provided with a positioning block, and a product in the first cavity is worn on the positioning block.

[0021] This application provides a plastic part manufactured using the in-mold assembly structure; the plastic part includes a first joint, a second joint, and a third joint; the first joint is incompatible with the second and third joints, and the first joint, the second joint, and the third joint can rotate relative to each other.

[0022] Preferably, the first joint is provided with two connecting holes, the second joint and the third joint are injection molded to encapsulate the first joint, the first pivot on the second joint passes through the first connecting hole, the second pivot on the third joint passes through the second connecting hole, the end of the second joint is provided with a first insertion hole, and the end of the third joint is provided with a second insertion hole.

[0023] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, the third mold is set on a rotatable base plate, and the first mold and the second mold can be closed together with the third mold.

[0024] During production, after the first mold and the third mold are closed, the first insert and the third insert extend into the first cavity, and the first cavity is blocked. Then, the first injection plastic is injected into the first cavity from the first flow channel, and the first joint is formed on the third insert.

[0025] Next, the base plate rotates, and the third mold, which forms the first joint, rotates to the second mold. The second mold and the third mold close together, and the second insert extends into the second cavity. The second insert and the third insert cooperate to press the first joint tightly, preventing displacement. The first joint is in the third cavity. Then, the second injection molds are injected from the second runner and the third runner, respectively, forming the second joint in the second cavity and the third joint in the fourth cavity.

[0026] The first and second injection molding materials are incompatible. Therefore, after the first, second, and third joints are injection molded together, they can be separated by simply rotating any joint. This production method eliminates the need for manual assembly and is more efficient. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the mold in Embodiment 1 of this utility model.

[0028] Figure 2 These are schematic diagrams of the first and second molds of Embodiment 1 of this utility model.

[0029] Figure 3 This is one embodiment of the present utility model. Figure 2 Exploded view diagram.

[0030] Figure 4 This is one embodiment of the present utility model. Figure 4 Another perspective diagram.

[0031] Figure 5 is the third mold schematic view of the embodiment one of the utility model.

[0032] Figure 6 is the Figure 6 exploded schematic view of the embodiment one of the utility model.

[0033] Figure 7 is the plastic part process change schematic view of the embodiment two of the utility model.

[0034] Figure 8 is the plastic part schematic view of the embodiment two of the utility model.

[0035] The figure mark explanation is as follows:

[0036] 10, first mold;11, first nozzle plate;12, first mounting plate;13, first runner plate;14, first upper mold plate;15, first mold core;16, first runner;17, first cavity;18, first insert pin;19, first ejector pin;110, first inclined pressing block;111, first inclined groove;20, second mold;21, second mold core;22, second runner;23, second cavity;24, third runner;25, third cavity;26, fourth cavity;27, second insert pin;28, second nozzle plate;29, second mounting plate;210, second runner plate;211, second upper mold plate;212, second inclined pressing block;213, second inclined groove;30, third mold;31, lower mold plate;32, third mold core;33, third insert pin;34, first groove;35, inclined block;36, ejector pin plate;37, ejector pin;38, bottom plate;39, lower mold base;310, positioning block;40, first joint;41, second joint;42, third joint. Specific implementation

[0037] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific implementation, structure, features and effects according to the utility model are described in detail as follows by combining with the preferred embodiments and the drawings.

[0038] Please refer to Figures 1 to 6 , which shows the specific structure of the preferred embodiment of the utility model, and is an in-mold assembly structure.

[0039] Among them, the first mold 10 and the third mold 30 are closed to produce the first joint 40, after the mold is opened, the first joint 40 is on the third insert pin 33 of the third mold 30. The third mold 30 moves to the second mold 20 position, the first joint 40 on the third insert pin 33 enters into the third cavity 25, and then the second joint 41 and the third joint 42 are injection molded on the first joint 40, which does not need manual assembly and has higher production efficiency.

[0040] The application provides an in-mold assembly structure, comprising a bottom plate 38, a first mold 10, a second mold 20 and a third mold 30; the third mold 30 is arranged on the rotatable bottom plate 38; the first mold 10 and the second mold 20 can be closed together with the third mold 30. In the embodiment, two groups of third molds 30 are arranged on the bottom plate 38. The two groups of third molds 30 can be used alternately, so that the production speed is improved.

[0041] The first mold 10 comprises a first mold core 15 and a first insert pin 18; the inside of the first mold core 15 after being closed forms a first cavity 17; a first runner 16 is arranged on the first mold core 15 and communicates with the first cavity 17; the first insert pin 18 can extend into the first cavity 17 and block the first end of the first cavity 17; the second mold 20 comprises a second mold core 21 and a second insert pin 27; the inside of the second mold core 21 after being closed forms a second cavity 23, a third cavity 25 and a fourth cavity 26 which communicate with each other; a second runner 22 and a third runner 24 are arranged on the second mold core 21; the third cavity 25 is consistent in structure with the first cavity 17 (that is, the third cavity 25 is matched with the first joint 40); the second runner 22 communicates with the second cavity 23 and the third runner 24 communicates with the fourth cavity 26; the second insert pin 27 can extend into the second cavity 23; the third mold 30 comprises a lower mold plate 31, a third mold core 32 arranged on the lower mold plate 31 and a third insert pin 33 which can extend from the third mold core 32; wherein the first cavity 17 is used for forming the first joint 40, the second cavity 23 is used for forming the second joint 41 and the fourth cavity 26 is used for forming the third joint 42; the first mold 10 is closed with the third mold 30, the third insert pin 33 extends into the first cavity 17 and the first joint 40 in the first cavity 17 is formed on the third insert pin 33; the second mold 20 is closed with the third mold 30 and the first joint 40 on the third insert pin 33 extends into the third cavity 25.

[0042] Specific working principle: 1. When the first joint 40 is produced, the first mold 10 is closed with the third mold 30, the first mold core 15 and the third mold core 32 are closed, and the first insert pin 18 and the third insert pin 33 extend into the upper and lower opening positions of the first cavity 17. Then the first injection material enters the first cavity 17 from the first runner 16, and after the first injection material is cooled, the first joint 40 is formed on the third insert pin 33, so that the first joint 40 will not fall off.

[0043] 1. During injection molding of the second joint 41, the third joint 42, and the first joint 40, the third mold 30 carrying the first joint 40 moves to the position of the second mold 20. After the second mold 20 and the third mold 30 close, the second mold core 21 and the third mold core 32 close, and the second insert 27 presses on the first joint 40. In this way, the second insert 27 and the first insert 18 cooperate to fix the first joint 40 in the third cavity 25. The third cavity 25 and the first joint 40 are compatible, meaning that the third cavity 25 can firmly enclose the first joint 40. Next, the second injection plastic is injected from the second runner 22 and the third runner 24 respectively. After the second injection plastic cools, the second joint 41 is formed in the second cavity 23, and the third joint 42 is formed in the fourth cavity 26. The first injection plastic and the second injection plastic are incompatible plastics (e.g., POM material and ABS material). After the first joint 40, the second joint 41, and the third joint 42 are molded together, they can be separated and rotated by rotating any two of them. It is evident that this production method is more efficient, requires no manual assembly, and helps save costs.

[0044] Preferably, the first mold 10 further includes a first sprue plate 11, a first mounting plate 12, a first flow channel plate 13, and a first upper mold plate 14 arranged sequentially. The first upper mold plate 14 is provided with a first inclined pressing block 110, and the lower mold plate 31 is provided with a first groove 34, in which an inclined block 35 is provided. The first inclined pressing block 110 can press against the inclined block 35. The side of the first mold core 15 is provided with a first inclined groove 111, in which a connecting block is provided and connected to the first inclined pressing block 110. When the first mold 10 and the third mold 30 are closed, the first inclined pressing block 110 presses against the inclined block 35, so that the first mold core 15 can be firmly closed together, which is ingenious. The first inclined groove 111 is provided with a connecting block connected to the first inclined pressing block 110. This design means that when the first mold 10 and the third mold 30 are separated, the first inclined pressing block 110 will push the first mold core 15 outward, so that the two first mold cores 15 are separated. The first injection of plastic enters different first cavities 17 through the first injection port and the runner plate, and multiple first joints 40 can be formed at one time.

[0045] Preferably, the first mold 10 further includes a first ejector module, which is disposed on the first sprue plate 11. The first ejector 19 of the first ejector module ejects the first joint 40 from the first cavity 17. After the first mold core 15 is separated, the first ejector 19 of the first ejector module holds the first joint 40, thereby allowing the first joint 40 to remain in the third insert 33 without falling off. This design is very ingenious.

[0046] Preferably, the second mold 20 further comprises a second nozzle plate 28, a second mounting plate 29, a second runner plate 210, and a second upper mold plate 211 arranged in sequence; the second upper mold plate 211 is provided with a second inclined pressing block 212, and the lower mold plate 31 is provided with a first inner groove 34 in which an inclined block 35 is arranged; the second inclined pressing block 212 can press against the inclined block 35. The side surface of the second mold core 21 is provided with a second inclined groove 213 in which a connecting block is arranged and connected with the second inclined pressing block 212. Similarly, when the second mold 20 and the third mold 30 are closed, the second inclined pressing block 212 presses against the inclined block 35, so that the two second mold cores 21 can be tightly closed together. When the second mold 20 and the third mold 30 are separated, the second inclined pressing block 212 will push the second mold core 21 outward, so that the two second mold cores 21 are separated. The second insert pin 27 will push down the second joint 41, so that the final product is left on the third insert pin 33, which is more convenient to take down.

[0047] Preferably, the third mold 30 further comprises a lower mold base 39, a ejector plate 36 arranged on the lower mold base 39, and an ejector pin 37 arranged on the ejector plate 36 and ejecting from the third mold core 32. The ejector pin 37 can eject the nozzle material. The third insert pin 33 can move up and down in the insert sleeve. During production, the third insert pin 33 extends from the insert sleeve, and the first joint 40 is conveniently formed on the third insert pin 33. When it is necessary to take down the product, the third insert pin 33 is retracted from the insert sleeve, so that the product falls off, which is very convenient and fast.

[0048] Preferably, the tip position of the third insert pin 33 is provided with at least two annular steps; the top of the annular step is provided with a positioning block 310, and the product in the first cavity 17 is worn on the positioning block 310. After the first joint 40 is formed on the positioning block 310, it is convenient to transfer the first joint 40, and the first joint 40 will not fall off, which is very convenient.

[0049] Embodiment two

[0050] Please refer to Figures 7-8 The present application provides a plastic part made by using the mold-in assembly structure; the plastic part comprises a first joint 40, a second joint 41, and a third joint 42; the first joint 40 is incompatible with the second joint 41 and the third joint 42, and the first joint 40, the second joint 41, and the third joint 42 can rotate relative to each other. The first joint 40, the second joint 41, and the third joint 42 are made of different injection molding materials and are incompatible with each other, so that after the first joint 40, the second joint 41, and the third joint 42 are injection molded together, only two joints need to be rotated to separate them, which is very efficient and does not require manual assembly.

[0051] Preferably, the first joint 40 is provided with two connecting holes, the second joint 41 and the third joint 42 are injection-molded to wrap the first joint 40, the first rotating shaft on the second joint 41 is inserted into the first connecting hole, the second rotating shaft on the third joint 42 is inserted into the second connecting hole, the end of the second joint 41 is provided with a first insertion hole, and the end of the third joint 42 is provided with a second insertion hole. The first rotating shaft and the second rotating shaft are inserted into the corresponding different connecting holes, so that the structure is not easy to fall off and is more firm. The first insertion hole and the second insertion hole are used for connecting a toy arm or a small leg and the like, so that subsequent assembly is facilitated.

[0052] In summary, the design of the utility model focuses on that the first mold 10 and the third mold 30 cooperate to produce the first joint 40. After the mold is opened, the first joint 40 is fixed on the third insert needle 33 of the third mold 30. Then the third mold 30 moves to the position of the second mold 20, the first joint 40 on the third insert needle 33 enters the third cavity 25, and then the second joint 41 and the third joint 42 are injection-molded on the first joint 40. The first joint 40, the second joint 41 and the third joint 42 are injection-molded together and will not fall off, so that manual assembly is not needed, and the production efficiency is higher.

[0053] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as above, it is not intended to limit the utility model. Any person skilled in the art can make some changes or modifications to the above-mentioned disclosed technical content to obtain equivalent embodiments with equivalent changes, as long as the changes do not deviate from the technical scheme of the utility model. Any modification, equivalent change and modification of the above-mentioned embodiments, which do not deviate from the technical scheme of the utility model and are based on the technical essence of the utility model, are still within the scope of the technical scheme of the utility model.

Claims

1. An in-mold assembly structure, characterized by: It comprises a base plate, a first mold, a second mold and a third mold; the third mold is arranged on the rotatable base plate; the first mold and the second mold can be closed together with the third mold; The first mold comprises a first mold core and a first insert pin; the inside of the first mold core after being closed forms a first cavity; a first runner is arranged on the first mold core and communicates with the first cavity; the first insert pin can extend into the first cavity and block the first end of the first cavity; The second mold comprises a second mold core and a second insert pin; the inside of the second mold core after being closed forms a second cavity, a third cavity and a fourth cavity which communicate with each other; a second runner and a third runner are arranged on the second mold core; the third cavity has the same structure as the first cavity; the second runner communicates with the second cavity and the third runner communicates with the fourth cavity; the second insert pin can extend into the second cavity; The third mold comprises a lower mold plate, a third mold core arranged on the lower mold plate and a third insert pin which can extend from the third mold core; The first cavity is used for forming a first joint, the second cavity is used for forming a second joint and the fourth cavity is used for forming a third joint; The first mold and the third mold are closed, the third insert pin extends into the first cavity and the first joint in the first cavity is formed on the third insert pin; The second mold and the third mold are closed and the first joint on the third insert pin extends into the third cavity.

2. The structure of claim 1, wherein: The first mold further comprises a first nozzle plate, a first mounting plate, a first runner plate and a first upper mold plate which are arranged in sequence; the first upper mold plate is provided with a first inclined pressing block and the lower mold plate is provided with a first groove in which an inclined block is arranged; the first inclined pressing block can press on the inclined block.

3. The structure of claim 2, wherein: The side surface of the first mold core is provided with a first inclined groove in which a connecting block is arranged and connected with the first inclined pressing block.

4. A structure for in-mold assembly according to claim 2 or 3, wherein: The first mold further comprises a first ejector pin module which is arranged on the first nozzle plate; a first ejector pin of the first ejector pin module ejects the first joint in the first cavity.

5. The structure of claim 1, wherein: The second mold further comprises a second nozzle plate, a second mounting plate, a second runner plate and a second upper mold plate which are arranged in sequence; the second upper mold plate is provided with a second inclined pressing block and the lower mold plate is provided with a second groove in which an inclined block is arranged; the second inclined pressing block can press on the inclined block.

6. The structure of claim 5, wherein: The side surface of the second mold core is provided with a second inclined groove in which a connecting block is arranged and connected with the second inclined pressing block.

7. The structure of claim 1, wherein: The third mold further comprises a lower mold base and an ejector pin plate; the ejector pin plate is arranged on the lower mold base and an ejector pin is arranged on the ejector pin plate; the ejector pin is ejected from the third mold core.

8. The structure of claim 1, wherein: The tip position of the third insert pin is provided with at least two annular steps; the top of the annular step is provided with a positioning block and the product in the first cavity is worn on the positioning block.

9. A plastic part, characterized by: The plastic part is made by using the mold assembly structure in any one of claims 1-8; the plastic part comprises a first joint, a second joint and a third joint; the first joint is incompatible with the second joint and the third joint and the first joint, the second joint and the third joint can rotate relative to each other.

10. The plastic part of claim 9, wherein: The first joint is provided with two connecting holes, the second joint and the third joint are injection-molded to wrap the first joint, a first rotating shaft on the second joint is inserted into the first connecting hole, a second rotating shaft on the third joint is inserted into the second connecting hole, an end of the second joint is provided with a first insertion hole, and an end of the third joint is provided with a second insertion hole.

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