Injection mold for multiple inverted plastic parts

Abstract

The utility model discloses an injection mold for a multi-back-off plastic part, which relates to the technical field of injection molds and comprises two guide rails symmetrically arranged, a driving component is movably mounted in the guide rails and electrically connected with an external power supply, a front mold is slidably mounted between the two guide rails, and a rear mold is mounted between the two guide rails and electrically connected with the external power supply. The front mold is fixedly connected with the driving assembly, the demolding piece is fixedly installed at the output end of the front mold, the rear mold is arranged at the other end of the demolding piece and installed between the guide rails in a sliding mode, a forming opening is formed in the top end of the rear mold, and the secondary assembly is fixedly installed between the front mold and the rear mold. And demolding separation stability is facilitated, demolding is easy and stable, the forming rate is higher, and the injection molding production efficiency is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of injection molds, and specifically relates to an injection mold for multiple undercut plastic parts. Background Technology

[0002] Injection molding is a method of shaping industrial products. Products are usually made using rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding compression molding and die casting. An injection molding machine (or injection molding machine for short) is the main molding equipment that uses plastic molds to make plastic products of various shapes from thermoplastic or thermosetting materials. Injection molding is achieved through an injection molding machine and a mold.

[0003] During the injection molding process, some workpieces have multiple undercut structures, which makes demolding more difficult.

[0004] Therefore, we propose an injection mold for multiple undercut plastic parts. Utility Model Content

[0005] This invention provides an injection mold for multiple undercut plastic parts to solve the technical problems mentioned in the background.

[0006] To solve the above-mentioned technical problems, this utility model provides an injection mold for multiple undercut plastic parts, including guide rails. Two guide rails are provided and arranged symmetrically. A drive assembly is movably installed in the guide rails and electrically connected to an external power supply. A front mold is slidably installed between the two guide rails and is fixedly connected to the drive assembly. A demolding component is fixedly installed at the output end of the front mold and a rear mold is provided at the other end of the demolding component. The rear mold is slidably installed between the guide rails and has a molding opening at its top. A secondary component is fixedly installed between the front mold and the rear mold.

[0007] Preferably, a spring is fixedly installed on the inner wall of the rear mold. Two springs are provided and arranged symmetrically. Module 1 is fixedly installed on the other end of the spring and slidably installed on the inner side of the rear mold. Module 2 is fixedly installed on the inner wall of the rear mold. Two modules 2 are symmetrically provided and correspond to the forming opening.

[0008] Preferably, the demolding component includes push block one and push block two. A sliding groove is provided on the rear side of the rear mold. Push block one is fixedly installed on the rear side of module one. Push block one is slidably installed in the sliding groove. Push block two is fixedly installed on the front mold at the corresponding position of push block one.

[0009] Preferably, the connection between push block one and push block two is inclined, and push block one and push block two are closely connected.

[0010] Preferably, the secondary component includes a slide rail, the slide rail is fixedly installed at the bottom of the front mold, a slider is slidably installed inside the slide rail, a pull rod is fixedly installed at one end of the slider, the pull rod passes through the slide rail, and the other end of the pull rod is fixedly connected to the rear mold.

[0011] Preferably, the slider and the pull rod are arranged in a cross pattern, and the slider and the pull rod are in a T-shape.

[0012] Preferably, the drive assembly includes a sprocket, which is rotatably mounted inside the guide rail. Multiple sprockets are provided and arranged symmetrically. A chain is sleeved between the sprockets, and a drive block is fixedly mounted on the chain. The drive block passes through the guide rail and is fixedly connected to the front mold.

[0013] Preferably, the drive assembly further includes a rotating shaft, which is rotatably mounted between the two guide rails. The rotating shaft is fixedly connected to the inner wall of the sprocket. A motor is fixedly mounted on the outer side of the guide rails. The motor is electrically connected to an external power supply. A drive wheel is fixedly mounted on the output end of the motor. A driven wheel is fixedly mounted on the middle position of the rotating shaft. The drive wheel and the driven wheel are meshed together.

[0014] This invention has the following advantages over the prior art:

[0015] 1. This utility model discloses an injection mold for multiple undercut plastic parts. After the workpiece is formed, a drive assembly is set up to start the motor circuit. The motor drives the drive wheel to rotate. The drive wheel meshes with the driven wheel, thereby driving the driven wheel to rotate. The rotation of the driven wheel drives the rotating shaft fixedly connected to it to rotate. The rotating shaft drives the sprocket on one side to rotate. A chain is sleeved on the outside of the sprocket, thereby driving the chain to rotate along the sprocket. The drive block is fixedly installed on the chain, thereby driving the front mold to move. The coaxial drive method facilitates the stability of demolding and separation.

[0016] 2. This utility model discloses an injection mold for multi-undercut plastic parts. A drive block moves the front mold, which in turn moves the slider along the slide rail and pushes the second push block backward. The second push block is pushed out along the inclined surface of the first push block, causing the first module to move laterally under the action of a spring, thereby separating the first module from the workpiece and achieving demolding with lateral undercut. When the slider moves to the bottom of the slide rail, the slide rail limits the slider, thereby pulling the tie rod, which drags the rear mold to move, causing the second module, which is arranged longitudinally on the inner side of the rear mold, to separate from the workpiece and achieve demolding with longitudinal undercut. Demolding is simple and stable, with a higher molding rate, effectively improving injection molding production efficiency. Attached Figure Description

[0017] Figure 1 This is a structural diagram of an injection mold for a multi-inverted plastic part according to the present invention;

[0018] Figure 2This is an assembly structure diagram of the front mold and the rear mold in an injection mold for a multi-undercut plastic part according to this utility model;

[0019] Figure 3 This is a cross-sectional view of the rear mold in an injection mold for a multi-inverted plastic part according to the present invention.

[0020] Figure 4 This is a structural diagram of the guide rail in an injection mold for multi-inverted plastic parts according to this utility model;

[0021] The following are the labeling elements in the diagram: 1. Guide rail; 2. Drive assembly; 3. Front mold; 4. Secondary assembly; 5. Molding port; 6. Rear mold; 7. Demolding component; 8. Slide groove; 9. Push block one; 10. Push block two; 11. Slide rail; 12. Slider; 13. Tie rod; 14. Module one; 15. Module two; 16. Rotating shaft; 17. Driven wheel; 18. Drive wheel; 19. Motor; 20. Sprocket; 21. Chain; 22. Drive block; 23. Spring. Detailed Implementation

[0022] Please see Figure 1-4 This utility model provides a technical solution: an injection mold for multiple undercut plastic parts, including guide rails 1, two guide rails 1 are provided and arranged symmetrically, a drive component 2 is movably installed in the guide rails 1, the drive component 2 is electrically connected to an external power supply, a front mold 3 is slidably installed between the two guide rails 1, the front mold 3 is fixedly connected to the drive component 2, a demolding component 7 is fixedly installed at the output end of the front mold 3, a rear mold 6 is provided at the other end of the demolding component 7, the rear mold 6 is slidably installed between the guide rails 1, a molding opening 5 is opened at the top of the rear mold 6, and a secondary component 4 is fixedly installed between the front mold 3 and the rear mold 6.

[0023] Furthermore, springs 23 are fixedly installed on the inner wall of the rear mold 6. There are two springs 23, which are symmetrically arranged. Module 14 is fixedly installed on the other end of the springs 23. Module 14 is slidably installed on the inner side of the rear mold 6. Module 25 is fixedly installed on the inner wall of the rear mold 6. There are two symmetrical modules 25, which correspond to the forming opening 5.

[0024] Furthermore, the demolding component 7 includes push block 1 9 and push block 2 10. A groove 8 is provided on the rear side of the rear mold 6. Push block 1 9 is fixedly installed on the rear side of module 1 14. Push block 1 9 is slidably installed in the groove 8. Push block 2 10 is fixedly installed on the front mold 3 at the corresponding position of push block 1 9.

[0025] Furthermore, the connection between push block 9 and push block 10 is inclined, and push block 9 and push block 10 are closely connected.

[0026] Furthermore, the secondary component 4 includes a slide rail 11, the slide rail 11 is fixedly installed at the bottom of the front mold 3, a slider 12 is slidably installed inside the slide rail 11, a pull rod 13 is fixedly installed at one end of the slider 12, the pull rod 13 passes through the slide rail 11, and the other end of the pull rod 13 is fixedly connected to the rear mold 6.

[0027] Furthermore, the slider 12 and the pull rod 13 are arranged in a cross pattern, and the slider 12 and the pull rod 13 form a T-shape.

[0028] Furthermore, the drive assembly 2 includes a sprocket 20, which is rotatably mounted inside the guide rail 1. There are multiple sprockets 20, which are symmetrically arranged, and a chain 21 is sleeved between the sprockets 20. A drive block 22 is fixedly mounted on the chain 21. The drive block 22 passes through the guide rail 1 and is fixedly connected to the front mold 3.

[0029] Furthermore, the drive assembly 2 also includes a rotating shaft 16, which is rotatably mounted between the two guide rails 1. The rotating shaft 16 is fixedly connected to the inner wall of the sprocket 20. A motor 19 is fixedly mounted on the outer side of the guide rails 1. The motor 19 is electrically connected to an external power supply. A drive wheel 18 is fixedly mounted on the output end of the motor 19. A driven wheel 17 is fixedly mounted in the middle of the rotating shaft 16. The drive wheel 18 and the driven wheel 17 are meshed together.

[0030] Working principle:

[0031] After the workpiece is formed, the motor 19 circuit is activated by setting the drive assembly 2. The motor 19 drives the drive wheel 18 to rotate. The drive wheel 18 meshes with the driven wheel 17, thereby driving the driven wheel 17 to rotate. The rotation of the driven wheel 17 drives the rotating shaft 16 fixedly connected to it to rotate. The rotating shaft 16 drives the sprocket 20 on one side to rotate. A chain 21 is sleeved on the outside of the sprocket 20, thereby driving the chain 21 to rotate along the sprocket 20. The drive block 22 is fixedly installed on the chain 21, thereby driving the front mold 3 to move. The coaxial drive method facilitates the stability of demolding and separation. The drive block 22 drives the front mold 3 to move, and the front mold 3 carries... The movable slider 12 moves along the slide rail 11, and the push block 10 moves backward. The push block 10 is pushed out along the inclined surface of the push block 9, so that the module 14 moves laterally under the action of the spring 23, thereby separating the module 14 from the workpiece and realizing the demolding of the lateral undercut. When the slider 12 moves to the bottom of the slide rail 11, the slide rail 11 limits the slider 12, thereby pulling the pull rod 13, which drags the rear mold 6 to move, so that the module 15 arranged longitudinally on the inner side of the rear mold 6 is separated from the workpiece, realizing the demolding of the longitudinal undercut. The demolding is simple and stable, the molding rate is higher, and the injection molding production efficiency is effectively improved.

Claims

1. An injection mold for multiple undercut plastic parts, comprising a guide rail (1), characterized in that: Two guide rails (1) are provided and are arranged symmetrically. A drive assembly (2) is movably installed in the guide rail (1). The drive assembly (2) is electrically connected to an external power supply. A front mold (3) is slidably installed between the two guide rails (1). The front mold (3) is fixedly connected to the drive assembly (2). A demolding component (7) is fixedly installed at the output end of the front mold (3). A rear mold (6) is provided at the other end of the demolding component (7). The rear mold (6) is slidably installed between the guide rails (1). A forming opening (5) is opened at the top of the rear mold (6). A secondary assembly (4) is fixedly installed between the front mold (3) and the rear mold (6).

2. The injection mold for a multi-undercut plastic part according to claim 1, characterized in that, Springs (23) are fixedly installed on the inner wall of the rear mold (6). There are two springs (23) arranged symmetrically. Module 1 (14) is fixedly installed on the other end of the springs (23). Module 1 (14) is slidably installed on the inner side of the rear mold (6). Module 2 (15) is fixedly installed on the inner wall of the rear mold (6). There are two modules (15) arranged symmetrically. The two modules (15) correspond to the forming opening (5).

3. The injection mold for a multi-undercut plastic part according to claim 2, characterized in that, The demolding component (7) includes push block one (9) and push block two (10). The rear mold (6) has a groove (8) on its rear side. Push block one (9) is fixedly installed on the rear side of module one (14). Push block one (9) is slidably installed in the groove (8). Push block two (10) is fixedly installed on the front mold (3) at the corresponding position of push block one (9).

4. The injection mold for a multi-undercut plastic part according to claim 3, characterized in that, The connection between the push block 1 (9) and the push block 2 (10) is inclined, and the push block 1 (9) and the push block 2 (10) are closely connected.

5. The injection mold for a multi-undercut plastic part according to claim 4, characterized in that, The secondary component (4) includes a slide rail (11). The slide rail (11) is fixedly installed at the bottom of the front mold (3). A slider (12) is slidably installed inside the slide rail (11). A pull rod (13) is fixedly installed at one end of the slider (12). The pull rod (13) passes through the slide rail (11), and the other end of the pull rod (13) is fixedly connected to the rear mold (6).

6. The injection mold for a multi-undercut plastic part according to claim 5, characterized in that, The slider (12) and the pull rod (13) are arranged in a cross shape, and the slider (12) and the pull rod (13) are in a T-shape.

7. The injection mold for a multi-undercut plastic part according to claim 6, characterized in that, The drive assembly (2) includes a sprocket (20). The sprocket (20) is rotatably installed in the guide rail (1). There are multiple sprockets (20), which are symmetrically arranged. A chain (21) is sleeved between the sprockets (20). A drive block (22) is fixedly installed on the chain (21). The drive block (22) passes through the guide rail (1) and is fixedly connected to the front mold (3).

8. The injection mold for a multi-undercut plastic part according to claim 7, characterized in that, The drive assembly (2) also includes a rotating shaft (16), which is rotatably mounted between the two guide rails (1). The rotating shaft (16) is fixedly connected to the inner wall of the sprocket (20). A motor (19) is fixedly mounted on the outer side of the guide rails (1). The motor (19) is electrically connected to an external power source. A drive wheel (18) is fixedly mounted on the output end of the motor (19). A driven wheel (17) is fixedly mounted in the middle of the rotating shaft (16). The drive wheel (18) and the driven wheel (17) are meshed together.

Images