Structure for preventing product from being strained by secondary die assembly

Abstract

The utility model discloses a structure for preventing a product from being strained by secondary mold closing, which comprises a mold, an ejection structure and an injection molding channel, and is characterized in that a mold core is arranged in the mold, the injection molding channel is communicated to the injection molding position of the mold core, the ejection structure comprises an ejector pin and an ejector plate, one end of the ejector pin is fixed with the ejector plate, and the other end of the ejector pin is inserted into the mold core. The mold core is provided with a shovel base, a sliding block, a limiting block and a limiting spring, the sliding block is provided with an inner cavity, the limiting spring penetrates into the inner cavity of the sliding block from the upper end of the sliding block, the top end of the limiting spring can abut against the shovel base, and the lower end of the limiting spring is inserted into a limiting hole in the top end of the limiting block; the ejector pin can ascend to abut against the second bevel edge of the limiting block and compress the limiting spring, a first bevel edge is arranged on the second limiting opposite side of the limiting block, when the shovel base is pressed downwards, the first bevel edge abuts against the third bevel edge of the shovel base, and the limiting block and the limiting spring are both in a certain angle for inclination measurement.

Description

Technical Field

[0001] The utility model relates to the field of ejector pins, in particular to a product structure for preventing secondary die clamping from damaging the product. Background Technique

[0002] The two-color product secondary injection molding technology, also known as the two-shot injection molding technology, is a technology for manufacturing plastic products by mixing and injecting two plastic materials. This technology realizes the diversification of product appearance and function by continuously injecting two different colors of plastic materials in the same mold.

[0003] However, the existing two-color injection molding technology still has the following problems:

[0004] The design and production of two-color injection molds are relatively complex and require considering various factors, such as shrinkage rate, exhaust, filling, etc. These technical difficulties increase the difficulty of mold manufacturing and debugging. At the same time, since the injection time, temperature, pressure and other parameters of the two plastic materials need to be precisely controlled during the two-color injection molding process, the requirements for the production equipment and the skill level of the operators are relatively high. During the two-color injection molding process, some quality problems may occur, such as pressing damage, glue overflow, etc. These problems are usually caused by unreasonable mold design, improper control of injection conditions or improper material selection. These quality problems will not only affect the appearance and performance of the product, but also pose a potential threat to the service life and safety of the product.

[0005] Therefore, how to design a structure that can prevent the product from being damaged during the rotation of the two-color product secondary injection molding has become an urgent problem to be solved by those skilled in the art. Content of the Utility Model

[0006] The purpose of the utility model is to provide a product structure for preventing secondary die clamping from damaging the product, so as to solve the problems put forward in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] Provide a product structure for preventing secondary die clamping from damaging the product, including a mold, an ejection structure and an injection channel. A mold core is arranged inside the mold. The injection channel is communicated to the injection place of the mold core. The ejection structure includes an ejector pin and a top plate. One end of the ejector pin is fixed to the top plate, and the other end is inserted into the mold core. The mold core is provided with a lifter base, a slider, a limit block and a limit spring. The slider is provided with an inner cavity. The limit spring penetrates into the inner cavity of the slider from the upper end of the slider, and the top end of the limit spring can be in contact with the lifter base. The lower end of the limit spring is inserted into the limit hole at the top end of the limit block. The ejector pin can rise to be in contact with the second inclined side of the limit block and compress the limit spring. A first inclined side is arranged on the opposite side of the second limit of the limit block. When the lifter base is pressed down, the first inclined side is in contact with the third inclined side of the lifter base. The limit block and the limit spring are both inclined at a certain angle.

[0009] Furthermore, the shovel base is fixed to the upper mold structure. During injection molding, the upper mold structure is pressed down to combine with the mold to form a complete injection molding module. A slide groove is provided on the third bevel of the shovel base, and the slide groove is consistent with the limit spring.

[0010] Furthermore, a pressing hole is provided at the top of the shovel base, and the shovel base is fixed to the upper mold structure through the pressing hole.

[0011] Furthermore, it comprises a fixed block and a bottom plate, wherein the bottom plate is arranged at the lower end of the slider, and the fixed block is fixed to the lower end surface of the slider and embedded in the inner cavity of the slider.

[0012] Furthermore, the fixing block is provided with a limiting groove, and a fourth oblique edge is provided on the inner side of the limiting groove.

[0013] Furthermore, the fixing block is inserted into the limiting groove, and the fourth bevel is consistent with the inner wall of the groove.

[0014] Furthermore, a top hole and a spring groove are provided at the top of the sliding block, and the top hole and the spring groove are communicated with the inner cavity.

[0015] Furthermore, the limit spring is inserted into the spring slot, and the top end of the limit spring protrudes from the spring slot and contacts the sliding slot.

[0016] Furthermore, the ejector pin penetrates into the ejection hole from the bottom end of the slider, and when the ejector pin moves upward, the ejector pin conflicts with the second bevel of the limit block, the limit block compresses the limit spring, and the limit spring moves upward from the spring groove along the slide groove.

[0017] Furthermore, after the limit spring is ejected, the ejector pin continues to move upward to contact the slider, and the ejector pin ejects the slider to complete demoulding.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model provides a product structure for preventing secondary mold clamping from damaging the product. Since two-color products require secondary injection molding, after the first injection molding, it rotates 180 degrees for secondary injection molding, and during the rotation process, the slider cannot leave the product, otherwise it will damage the product. A slider is provided in the mold core. When the upper mold presses down, the lifter adheres to the side end of the slider. The slider is provided with a spring groove, and the lifter is provided with a chute corresponding to the spring groove. A limiting spring is arranged to penetrate into the spring groove, and the bottom of the limiting spring is inserted into the limiting block. When the ejector pin moves upward from the bottom of the slider, the ejector pin abuts against the second inclined side of the limiting block. At the same time, the lifter gives a lateral supporting force to the limiting block, forcing the limiting block unable to move laterally. The limiting block compresses the limiting spring upward, and the limiting spring pops out of the spring groove along the chute under the action of the ejector pin. If the ejector pin continues to rise, the slider is ejected under the action of the ejector pin to complete demolding. The limiting spring fixes the slider during the rotation process, improves the stability of the slider, and prevents the product from being damaged. The utility model has the characteristics of high finished product qualification rate and fast production efficiency. Brief Description of the Drawings

[0020] Figure 1 It is a three-dimensional structure diagram of a product structure for preventing secondary mold clamping from damaging the product according to the utility model;

[0021] Figure 2 It is an internal structure diagram of a product structure for preventing secondary mold clamping from damaging the product according to the utility model;

[0022] Figure 3 It is a three-dimensional structure diagram of the limiting structure of a product structure for preventing secondary mold clamping from damaging the product according to the utility model;

[0023] Figure 4 It is a front view of the limiting structure of a product structure for preventing secondary mold clamping from damaging the product according to the utility model;

[0024] Figure 5 It is a structure diagram of the limiting block of a product structure for preventing secondary mold clamping from damaging the product according to the utility model;

[0025] Figure 6 It is a structure diagram of the lifter of a product structure for preventing secondary mold clamping from damaging the product according to the utility model;

[0026] Figure 7 It is a structure diagram of the fixing block of a product structure for preventing secondary mold clamping from damaging the product according to the utility model;

[0027] Figure 8 It is a structure diagram of the slider of a product structure for preventing secondary mold clamping from damaging the product according to the utility model;

[0028] The markings of each component in the attached drawings are as follows: 1, mold; 2, mold core; 21, shovel base; 211, chute; 212, third bevel; 213, shovel seat; 214, pressing hole; 22, slider; 221, inner cavity; 222, spring groove; 223, top hole; 23, limiting spring; 24, limiting block; 241, groove; 242, first bevel; 243, second bevel; 244, limiting hole; 25, fixing block; 251, limiting groove; 252, fourth bevel; 253, fixing hole; 26, bottom plate; 3, top plate; 4, ejector pin; 5, injection channel. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0030] Please refer to Figures 1 to 4 , a product structure for preventing secondary mold clamping from scratching is provided, including a mold 1, an ejection structure and an injection channel 5. A mold core 2 is arranged inside the mold 1. The injection channel 5 communicates with the injection part of the mold core 2. The ejection structure includes an ejector pin 4 and a top plate 3. One end of the ejector pin 4 is fixed to the top plate 3, and the other end is inserted into the mold core 2. The mold core 2 is provided with a shovel base 21, a slider 22, a limiting block 24 and a limiting spring 23. The slider 22 is provided with an inner cavity 221. The limiting spring 23 penetrates into the inner cavity 221 of the slider 22 from the upper end of the slider 22. The top end of the limiting spring 23 can be in contact with the shovel base 21, and the lower end of the limiting spring 23 is inserted into the limiting hole 244 at the top end of the limiting block 24. The ejector pin 4 can rise to be in contact with the second bevel 243 of the limiting block 24 and compress the limiting spring 23. A first bevel 242 is provided on the opposite side of the second limit of the limiting block 24. When the shovel base 21 is pressed down, the first bevel 242 is in contact with the third bevel 212 of the shovel base 21. The limiting block 24 and the limiting spring 23 are both inclined at a certain angle.

[0031] Please refer to Figure 6 , the shovel base 21 is fixed to the upper mold structure. During injection molding, the upper mold structure is pressed down to be combined with the mold 1 to form a complete injection molding module. A chute 211 is provided on the third bevel 212 of the shovel base 21, and the chute 211 is in line with the limiting spring 23. A pressing hole 214 is provided at the top end of the shovel base 21, and the shovel base 21 is fixed to the upper mold structure through the pressing hole 214.

[0032] Please refer to Figure 3 and Figure 7, including a fixed block 25 and a bottom plate 26. The bottom plate 26 is provided at the lower end of the slider 22. The fixed block 25 is fixed to the lower end of the slider 22 and is embedded in the inner cavity 221 of the slider 22. The fixed block 25 is provided with a limiting groove 251, and a fourth bevel 252 is provided on the inner side of the limiting groove 251. The fixed block 25 is inserted into the limiting groove 251, and the fourth bevel 252 is in conformity with the inner wall of the groove 241.

[0033] Please refer to Figure 4 and Figure 8 , a top hole 223 and a spring groove 222 are provided at the top end of the slider 22. The top hole 223 and the spring groove 222 are communicated with the inner cavity 221. The limiting spring 23 is inserted from the spring groove 222, and the top end of the limiting spring 23 protrudes from the spring groove 222 and abuts against the sliding groove 211. The ejector pin 4 penetrates into the top hole 223 from the bottom end of the slider 22. When the ejector pin 4 moves upward, the ejector pin 4 abuts against the second bevel 243 of the limiting block 24, and the limiting block 24 compresses the limiting spring 23. The limiting spring 23 moves upward along the sliding groove 211 from the spring groove 222. After the limiting spring 23 is ejected, the ejector pin 4 continues to move upward and abuts against the slider 22. The ejector pin 4 ejects the slider 22 to complete demolding.

[0034] Specifically, please refer to Figures 4 - 8, the ejector pin 4 penetrates through the top of the slider 22 under the action of the top plate 3. The slider 22 is provided with a corresponding ejector hole 223. The slider 22 is provided with an inner cavity 221. A spring groove 222 is provided beside the ejector hole 223. The ejector hole 223, the spring groove 222 and the inner cavity 221 are communicated with each other. The bottom plate 26 is attached to the bottom end of the slider 22. The fixing block 25 is fixed to the lower end of the slider 22. Fixing holes 253 are provided on both sides of the fixing block 25 and are fixed to the slider 22 by bolts. The fixing block 25 is provided with a limiting groove 251 and a fourth bevel 252 on the inner side. The limiting block 24 is inserted into the limiting groove 251. The limiting block 24 is provided with a groove 241 corresponding to the fourth bevel 252. The limiting block 24 is also provided with a first bevel 242 and a second bevel 243, which can respectively abut against the ejector pin 4 and the ejector base 21. A limiting hole 244 is also provided at the top of the limiting block 24. The limiting spring 23 passes through the spring groove 222 and is inserted into the limiting hole 244. When the ejector base 21 is pressed down, the top of the limiting spring 23 can also abut against the ejector base 21. The ejector base 21 is provided with a corresponding sliding groove 211. The ejector base 21 is provided with an ejector seat 213. A pressing hole 214 is provided at the top of the ejector seat 213. Threads are provided in the pressing hole 214. The ejector base 21 is threadedly connected to the upper mold through the pressing hole 214. After the first injection molding is completed, the mold 1 rotates under the drive of an external device. Due to the action of the limiting spring 23, the slider 22 is connected to the limiting block 24 to prevent the slider 22 from fluctuating during rotation and damaging the unformed product. After the second injection molding is completed, the ejector pin 4 rises under the action of the top plate 3 to disengage the limiting block 24 from the limiting groove 251 and eject the limiting spring 23. Subsequently, the ejector pin 4 rises again to eject the slider 22, completing the demolding.

[0035] It can be seen that an ejection structure corresponding to the product is also provided in the injection cavity. The ejection structure cooperates with the ejector pin 4 to complete the overall ejection effect of the product.

[0036] The utility model provides a product structure for preventing secondary die clamping from scratching the product. Since two-color products require secondary injection molding, after the first injection molding, it rotates 180 degrees for secondary injection molding, and during the rotation process, the slider 22 cannot leave the product, otherwise it will scratch the product. A slider 22 is provided on the mold core 2. When the upper mold presses downwards, the lifter base 21 adheres to the side end of the slider 22. The slider 22 is provided with a spring groove 222, and the lifter base 21 is provided with a sliding groove 211 corresponding to the spring groove 222. A limiting spring 23 is inserted into the spring groove 222, and the bottom of the limiting spring 23 is inserted into the limiting block 24. When the ejector pin 4 moves upwards from the bottom of the slider 22, the ejector pin 4 abuts against the second inclined side 243 of the limiting block 24. At the same time, the lifter base 21 gives a lateral supporting force to the limiting block 24, forcing the limiting block 24 not to move laterally. The limiting block 24 compresses the limiting spring 23 upwards, and the limiting spring 23 pops out of the spring groove 222 along the sliding groove 211 under the action of the ejector pin 4. If the ejector pin 4 continues to rise, the slider 22 is ejected under the action of the ejector pin 4 to complete demolding. The limiting spring 23 fixes the slider 22 during the rotation process, improves the stability of the slider 22, and prevents the product from being scratched. The utility model has the characteristics of high finished product qualification rate and fast production efficiency.

[0037] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the utility model, according to the technical solution of the utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the utility model.

Claims

1. A structure for preventing product damage during secondary mold clamping, comprising a mold (1), an ejection structure and an injection channel (5), characterized in that: The mold (1) is provided with a mold core (2) inside, the injection channel (5) is connected to the injection molding position of the mold core (2), the ejection structure comprises an ejector pin (4) and an ejector plate (3), one end of the ejector pin (4) is fixed to the ejector plate (3), and the other end is inserted into the mold core (2), the mold core (2) is provided with a shovel base (21), a slider (22), a limit block (24) and a limit spring (23), the slider (22) is provided with an inner cavity (221), the limit spring (23) penetrates into the inner cavity (221) of the slider (22) from the upper end of the slider (22), and the limit spring (23) is provided with a shovel base (21), a slider (22), a limit block (24) and a limit spring (23), the slider (22) is provided with an inner cavity (221), and the limit spring (23) penetrates into the inner cavity (221) of the slider (22) from the upper end of the slider (22), and the limit spring (23) is provided with a shovel base (21), a slider (22), a limit block (24) and a limit spring (23) The top of the spring (23) can contact the shovel base (21), the lower end of the limit spring (23) is inserted into the limit hole (244) at the top of the limit block (24), the ejector pin (4) can rise to contact the second bevel (243) of the limit block (24) and compress the limit spring (23), the second limit opposite side of the limit block (24) is provided with a first bevel (242), when the shovel base (21) is pressed down, the first bevel (242) contacts the third bevel (212) of the shovel base (21), and the limit block (24) and the limit spring (23) are both inclined at a certain angle.

2. A product structure for preventing secondary mold pulling according to claim 1, characterized in that: The shovel base (21) is fixed to the upper mold structure. During injection molding, the upper mold structure is pressed downward to combine with the mold (1) to form a complete injection molding module. A sliding groove (211) is provided on the third inclined edge (212) of the shovel base (21), and the sliding groove (211) is consistent with the limit spring (23).

3. A product structure for preventing secondary mold pulling according to claim 2, characterized in that: A pressing hole (214) is provided at the top of the shovel base (21), and the shovel base (21) is fixed to the upper mold structure via the pressing hole (214).

4. The product structure for preventing secondary mold pulling according to claim 1 is characterized in that: It comprises a fixed block (25) and a bottom plate (26), wherein the bottom plate (26) is arranged at the lower end of the slider (22), and the fixed block (25) is fixed to the lower end surface of the slider (22) and embedded in the inner cavity (221) of the slider (22).

5. A product structure for preventing secondary mold-closing damage according to claim 4, characterized in that: The fixing block (25) is provided with a limiting groove (251), and a fourth oblique edge (252) is provided on the inner side of the limiting groove (251).

6. A product structure for preventing secondary mold-closing damage according to claim 5, characterized in that: The fixing block (25) is inserted into the limiting groove (251), and the fourth bevel (252) is consistent with the inner wall of the groove (241).

7. The product structure for preventing secondary mold pulling according to claim 1 is characterized in that: A top hole (223) and a spring groove (222) are provided at the top of the sliding block (22); the top hole (223) and the spring groove (222) are in communication with the inner cavity (221).

8. The product structure for preventing secondary mold-closing damage according to claim 7, characterized in that: The limit spring (23) is inserted into the spring groove (222), and the top end of the limit spring (23) protrudes from the spring groove (222) and contacts the slide groove (211).

9. A product structure for preventing secondary mold-closing damage according to claim 8, characterized in that: The ejector pin (4) passes through the ejector hole (223) from the bottom end of the slider (22). When the ejector pin (4) moves upward, the ejector pin (4) contacts the second bevel (243) of the limit block (24). The limit block (24) compresses the limit spring (23), and the limit spring (23) moves upward from the spring groove (222) along the slide groove (211).

10. A product structure for preventing secondary mold-closing damage according to claim 9, characterized in that: After the limit spring (23) is ejected, the ejector pin (4) continues to move upward to contact the slider (22), and the ejector pin (4) ejects the slider (22) to complete demoulding.

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