Rotary vertical two-color injection mold

Abstract

This utility model relates to a rotary vertical two-color injection mold. A turntable is arranged within the moving mold frame. The turntable includes a rotating block and A-cores and B-cores symmetrically arranged at both ends of the rotating block. A rotating shaft is located in the middle of the rotating block, with one end connected to the drive mechanism of an injection molding machine. A hard plastic cavity and a soft plastic cavity, corresponding to the two cores on the turntable, are arranged on the bottom surface of the fixed mold frame. During initial mold closing, core A, corresponding to the hard plastic cavity, closes to form a first injection cavity for molding the semi-finished product, and core B, corresponding to the soft plastic cavity, closes to close. When core A is driven by the injection molding machine's drive mechanism to rotate 180° to close to the soft plastic cavity, the soft plastic cavity and core A together form a second injection cavity that accommodates the semi-finished product and, based on the semi-finished product, injection molds the finished product. At this time, core B, corresponding to the hard plastic cavity, closes to form the first injection cavity for molding the semi-finished product. This utility model reduces equipment investment and mold management costs, while also reducing the loss during semi-finished product turnover.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology, specifically referring to a rotary vertical two-color injection mold. Background Technology

[0002] Automotive underbody grilles typically consist of a rigid, injection-molded main body and a soft, molded covering portion surrounding the main body. The commonly used molding process in the industry is as follows: first, the rigid main body is molded using a first injection mold to obtain a semi-finished product; then, this semi-finished product is transferred and positioned manually or mechanically into a second injection mold for secondary injection molding to cover the soft plastic portion, ultimately obtaining the complete finished product.

[0003] However, the existing technical solutions have the following drawbacks: First, they rely on two independent molds to complete the final product manufacturing, which results in high equipment purchase costs and complex mold maintenance and management, increasing production and operating costs. Second, during the turnover of semi-finished products between the two injection molding processes, they are prone to scratches, deformation, or poor adhesion due to inaccurate handling, positioning, or surface contamination. This not only increases the defect rate and material loss, but also has an adverse effect on the consistency and reliability of the final product quality. Summary of the Invention

[0004] The purpose of this invention is to provide a rotary vertical two-color injection mold that reduces equipment investment, mold management costs, and semi-finished product turnover losses.

[0005] This utility model is implemented as follows: A rotary vertical two-color injection mold includes a fixed mold and a moving mold. The moving mold includes a moving mold frame and a moving mold housing mounted on the moving mold frame. The fixed mold includes a fixed mold frame and a fixed mold housing. A turntable is rotatably and vertically mounted within the moving mold housing. The turntable includes a rotating block and A-cores and B-cores symmetrically arranged at both ends of the rotating block. A rotating shaft is located in the middle of the rotating block. One end of the rotating shaft is connected to the drive mechanism of the injection molding machine, and the other end is rotatably engaged with the moving mold housing. A hard plastic cavity and a soft plastic cavity corresponding to the two cores of the turntable are provided on the bottom surface of the fixed mold housing. Initial mold closing... When the A-core is molded to a hard plastic cavity, a hard plastic injection cavity is formed for molding the semi-finished product; when the B-core is molded to a soft plastic cavity, the A-core is driven by the injection molding machine to rotate 180° to switch positions to mold to a soft plastic cavity. The soft plastic cavity and the A-core together form a soft plastic injection cavity that accommodates the semi-finished product and is used to injection mold the finished product. At this time, the B-core is molded to a hard plastic cavity, a hard plastic injection cavity is formed for molding the semi-finished product. The hard plastic injection cavity and the soft plastic injection cavity are respectively connected to an independent first hot runner and a second hot runner.

[0006] In the aforementioned rotary injection mold, the bottom surfaces of the A-core and B-core are connected to the moving mold frame via a top plate and an ejector pin, respectively.

[0007] In the aforementioned rotary injection mold, the fixed mold frame is provided with two independent water channels, a first water channel and a second water channel. The first water channel is arranged around the hard plastic injection cavity, and the second water channel is arranged around the soft plastic injection cavity.

[0008] In the aforementioned rotary injection mold, a first fixed mold spring block sliding groove is provided between the periphery of the hard plastic cavity and the fixed mold frame. A first fixed mold spring block is provided in the first fixed mold spring block sliding groove. Two opposite sides of the first fixed mold spring block are a vertical surface and an inclined surface, respectively. The first fixed mold spring block is elastically connected to the fixed mold frame by a spring.

[0009] In the aforementioned rotary injection mold, a second fixed mold spring sliding groove is provided between the periphery of the soft rubber cavity and the fixed mold frame. A second fixed mold spring is provided in the second fixed mold spring sliding groove. A limit part is provided at the inner end of the second fixed mold spring. The second fixed mold spring is elastically connected to the fixed mold frame by a spring.

[0010] The outstanding advantages of this utility model compared to the prior art are: 1. This invention utilizes a 180° rotating A-type core and B-type core on a turntable to achieve continuous production of hard plastic semi-finished products (hard plastic injection cavity) and soft plastic overmolding (soft plastic injection cavity) within a single mold, eliminating the need for mold disassembly or replacement and significantly improving the production efficiency of dual-material products. Furthermore, after the hard plastic cavity and A-type core form the semi-finished product in the first round, when rotating to the soft plastic cavity, the soft plastic injection cavity can precisely perform soft plastic injection molding using the semi-finished product as the base, ensuring dimensional stability and interfacial bonding strength of the dual-material combination and avoiding positioning deviations associated with traditional secondary clamping. Compared to the traditional two-mold solution, this invention reduces equipment investment and mold management costs, while also reducing losses during semi-finished product turnover. 2. This utility model is also equipped with independent first hot runner and second hot runner, which correspond to the injection molding requirements of hard plastic and soft plastic respectively. The temperature, pressure and injection parameters can be adjusted independently to avoid cross-contamination of materials, and at the same time optimize the molding conditions of plastics with different melting characteristics (such as the difference in melting points between soft plastic and hard plastic). Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the moving mold of this utility model; Figure 2 This is a left view of the moving model of this utility model; Figure 3 This is a bottom view of the moving model of this utility model; Figure 4 This is a schematic diagram of the mold of this utility model; Figure 5 This is a bottom view of the mold of this utility model; Figure 6 This is a schematic diagram of the turntable of this utility model; Figure 7 This is a left view of the turntable of this utility model; Figure 8 This is a schematic diagram of the second fixed-mold spring block of this utility model; Figure 9 This is a schematic diagram of the first fixed-mold spring block of this utility model.

[0012] In the diagram: 1. Fixed mold; 2. Moving mold; 3. Moving mold base; 4. Moving mold frame; 5. Fixed mold base; 6. Fixed mold frame; 7. Turntable; 8. Rotating block; 9. A-type core; 10. B-type core; 11. Rotating shaft; 12. Hard plastic cavity; 13. Soft plastic cavity; 14. Top plate; 15. Ejector pin; 16. First fixed mold spring block; 17. Vertical surface; 18. Inclined surface; 19. Second fixed mold spring block; 20. Limiting part; 21. Hard plastic gate; 22. Soft plastic gate. Detailed Implementation

[0013] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —9: This utility model provides a rotary vertical two-color injection mold, which includes a fixed mold 1 and a moving mold 2. The moving mold 2 includes a moving mold frame 3 and a moving mold frame 4 disposed on the moving mold frame 3. The fixed mold 1 includes a fixed mold frame 5 and a fixed mold frame 6. A turntable 7 is disposed in the moving mold frame 4, which can be raised, lowered, and rotated. The turntable 7 includes a rotating block 8 and A-shaped cores 9 and B-shaped cores 10 symmetrically disposed at both ends of the rotating block 8. A rotating shaft 11 is disposed in the middle of the rotating block 8. One end of the rotating shaft 11 is connected to the drive mechanism of the injection molding machine, and the other end is rotatably engaged with the moving mold frame 4. The drive mechanism of the injection molding machine drives the rotating shaft 11 to move axially, thereby raising and lowering the turntable 7, and causing the rotating shaft 11 to rotate, thereby causing the turntable 7 to rotate. The bottom surface of the fixed mold frame 6 is provided with a hard plastic cavity 12 and a soft plastic cavity 13 corresponding to the two cores of the turntable 7. During the initial mold closing, the A core 9 corresponds to the hard plastic cavity 12 to form a hard plastic injection cavity for molding semi-finished products, and the B core 10 corresponds to the soft plastic cavity 13 to close. When the A core 9 is driven by the injection molding machine to rotate 180° to switch positions to correspond to the soft plastic cavity 13 for mold closing, the soft plastic cavity 13 and the A core 9 together form a soft plastic injection cavity that accommodates the semi-finished product and injects it into the finished product. At this time, the B core 10 corresponds to the hard plastic cavity 12 to form a hard plastic injection cavity for molding semi-finished products. The hard plastic injection cavity and the soft plastic injection cavity are respectively connected to an independent first hot runner and a second hot runner. The first hot runner includes a hard plastic gate 21, and the second hot runner includes a soft plastic gate 22.

[0014] This invention can be applied to the injection molding of the following pressure mesh.

[0015] This invention utilizes the A-core 9 and B-core 10 on the turntable 7 to rotate 180° and switch workstations, enabling continuous production of hard plastic semi-finished products (hard plastic injection cavity) and soft plastic overmolding (soft plastic injection cavity) within a single mold. This eliminates the need to disassemble or replace the mold, significantly improving the production efficiency of dual-material products. Furthermore, after the hard plastic cavity 12 and A-core 9 form the semi-finished product in the first round, when rotating to the soft plastic cavity 13, the soft plastic injection cavity can precisely perform soft plastic injection molding using the semi-finished product as the base, ensuring dimensional stability and interfacial bonding strength between the two materials and avoiding positioning deviations associated with traditional secondary clamping. Compared to the traditional two-mold solution, this invention reduces equipment investment and mold management costs, while also minimizing losses during semi-finished product turnover.

[0016] In addition, this utility model is equipped with independent first hot runner and second hot runner, which correspond to the injection molding requirements of hard plastic and soft plastic respectively. The temperature, pressure and injection parameters can be adjusted independently to avoid cross-contamination of materials, and at the same time optimize the molding conditions of plastics with different melting characteristics (such as the difference in melting points between soft plastic and hard plastic).

[0017] The bottom surfaces of the A-core 9 and B-core 10 described in this invention are connected to the hydraulic cylinders inside the moving mold frame 4 via the top plate 14 and ejector rod 15, respectively, to provide ejection and demolding for the product. The top plate 14 and ejector rod 15 provide uniform force support, ensuring that the A-core 9 and B-core 10 are subjected to balanced forces when the product is ejected by the injection molding machine.

[0018] Since soft and hard plastics have different cooling requirements, the fixed mold frame 6 of this utility model is provided with two independent water channels, a first water channel and a second water channel. The first water channel is arranged around the injection cavity of hard plastic, and the second water channel is arranged around the injection cavity of soft plastic. Each water channel has a cooling / temperature control effect to ensure precise temperature control and optimize product molding quality.

[0019] In addition, the present invention provides a first fixed mold spring block sliding groove between the periphery of the hard plastic cavity 12 and the fixed mold frame 6, and a first fixed mold spring block 16 is provided in the first fixed mold spring block sliding groove. The two opposite sides of the first fixed mold spring block 16 are a vertical surface 17 and an inclined surface 18, and the first fixed mold spring block 16 is elastically connected to the fixed mold frame 6 by a spring.

[0020] Similarly, a second fixed mold spring sliding groove is provided between the periphery of the soft rubber cavity 13 and the fixed mold frame 6. A second fixed mold spring 19 is provided in the second fixed mold spring sliding groove. A limit part 20 is provided at the inner end of the second fixed mold spring 19. The second fixed mold spring 19 is elastically connected to the fixed mold frame 6 by a spring.

[0021] With this structure, during mold closing, the moving mold frame 6 drives the first fixed mold spring block 16 and the second fixed mold spring block 19 to slide into their respective sliding grooves, at which point the springs are compressed. After injection molding, as the force of the moving mold frame 6 gradually disappears upon mold opening, the first fixed mold spring block 16 and the second fixed mold spring block 19 automatically pop out under the spring force, simultaneously causing the semi-finished product and the finished product to detach from the hard plastic cavity 12 and the soft plastic cavity 13, remaining on the A-core 9 and the B-core 10.

[0022] It should be noted that, since the first fixed mold spring 16 has an inclined surface 18 and a vertical surface 17, it automatically stops after the spring has pushed out to one end, preventing the first fixed mold spring 16 from disengaging from the first fixed mold spring sliding groove. The limiting part 20 provided at the inner end of the second fixed mold spring 19 can prevent the second fixed mold spring 19 from disengaging from the second fixed mold spring sliding groove.

[0023] The working principle of this utility model is as follows: During the initial mold closing, the A-core 9 corresponds to the hard plastic cavity 12 and closes to form a hard plastic injection cavity for molding semi-finished products, while the B-core 10 corresponds to the soft plastic cavity 13 and closes to the mold. The injection molding machine injects the resin into the first hot runner through the hard resin gate 21, and finally forms a semi-finished product in the hard resin injection cavity; After the mold is opened, the injection molding machine's drive mechanism drives the turntable 7 to extend out of the moving mold 2 and drives the turntable 7 to rotate 180° to switch positions. Then, the injection molding machine's drive mechanism reverses the action and drives the turntable 7 to reset.

[0024] After the mold is closed, the A-core 9 corresponds to the soft rubber cavity 12. The soft rubber cavity 12 and the A-core 9 together form a soft rubber injection cavity that accommodates the semi-finished product and injects it into the finished product. At this time, the B-core 10 corresponds to the hard rubber cavity 12 and the mold is closed to form a hard rubber injection cavity for molding the semi-finished product. The finished product is obtained by injecting glue into the soft rubber injection cavity through the soft rubber gate 22 and by injecting glue into the hard rubber injection cavity through the hard rubber gate 21.

[0025] The mold is opened again, and the finished product is ejected from the soft plastic cavity 13 by the second fixed mold spring block 19 and then collected by a robot or manually. The B core 10 and the semi-finished product rotate with the turntable 7 to the corresponding soft plastic cavity 13 to be molded and injection molded into a finished product, while the A core 9 is molded and injection molded into a semi-finished product again with the hard plastic cavity 12, and so on.

[0026] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A rotary vertical two-color injection mold, comprising a fixed mold (1) and a moving mold (2), wherein the moving mold (2) comprises a moving mold frame (3) and a moving mold frame (4) disposed on the moving mold frame (3), and the fixed mold (1) comprises a fixed mold frame (5) and a fixed mold frame (6), characterized in that: The moving mold frame (4) is equipped with a turntable (7) that can be raised, lowered, and rotated. The turntable (7) includes a rotating block (8) and A-cores (9) and B-cores (10) symmetrically arranged at both ends of the rotating block (8). A rotating shaft (11) is provided in the middle of the rotating block (8). One end of the rotating shaft (11) is connected to the drive mechanism of the injection molding machine, and the other end is rotatably engaged with the moving mold frame (4). A hard plastic cavity (12) and a soft plastic cavity (13) corresponding to the two cores of the turntable (7) are provided on the bottom surface of the fixed mold frame (6). During the initial mold closing, the A-core (9) closes the mold corresponding to the hard plastic cavity (12). A hard plastic injection cavity for molding semi-finished products is formed, and the B core (10) corresponds to the soft plastic cavity (13) for mold closing; when the A core (9) is driven by the injection molding machine to rotate 180° to switch the position to correspond to the soft plastic cavity (13) for mold closing, the soft plastic cavity (13) and the A core (9) together form a soft plastic injection cavity that accommodates the semi-finished product and injects the finished product on the basis of the semi-finished product. At this time, the B core (10) corresponds to the hard plastic cavity (12) for mold closing to form a hard plastic injection cavity for molding semi-finished products; the hard plastic injection cavity and the soft plastic injection cavity are respectively connected to an independent first hot runner and a second hot runner.

2. The rotary vertical two-color injection mold according to claim 1, characterized in that: The bottom surfaces of the A-type core (9) and B-type core (10) are connected to the moving mold frame (4) via the top plate (14) and the top rod (15), respectively.

3. A rotary vertical two-color injection mold according to claim 1, characterized in that: The fixed mold frame is provided with two independent water channels, a first water channel and a second water channel. The first water channel is arranged around the hard rubber injection cavity, and the second water channel is arranged around the soft rubber injection cavity.

4. A rotary vertical two-color injection mold according to claim 1, characterized in that: A first fixed mold spring sliding groove is provided between the periphery of the hard plastic cavity (12) and the fixed mold frame (6). A first fixed mold spring (16) is provided in the first fixed mold spring sliding groove. The two opposite sides of the first fixed mold spring (16) are a vertical surface (17) and an inclined surface (18), and the first fixed mold spring (16) is elastically connected to the fixed mold frame (6) by a spring.

5. A rotary vertical two-color injection mold according to claim 1 or 4, characterized in that: A second fixed mold spring sliding groove is provided between the periphery of the soft rubber cavity (13) and the fixed mold frame (6). A second fixed mold spring (19) is provided in the second fixed mold spring sliding groove. A limit part (20) is provided at the inner end of the second fixed mold spring (19). The second fixed mold spring (19) is elastically connected to the fixed mold frame (6) by a spring.

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