A die for composite injection molding of hardware

Abstract

The utility model relates to a hardware composite injection mould relates to injection mould technical field, including fixed mould assembly, movable mould assembly, hardware, be used for positioning and supporting hardware's positioning and supporting mechanism and be used for the ejection demoulding mechanism of product ejection, positioning and supporting mechanism includes first support rod and second support rod, is equipped with the positioning groove on hardware, one end of first support rod is fixedly connected in fixed mould assembly, and the other end is in butt joint with the groove bottom of positioning groove, one end of second support rod is fixedly connected in movable mould assembly, and the other end is in butt joint on the side of hardware away from positioning groove. Adopt above -mentioned technical scheme, through the double -sided support of first support rod and second support rod, effectively avoided the displacement or deformation of hardware when high -pressure molten plastic injection. Meanwhile, the ejection demoulding mechanism ensures that the product can be smoothly ejected from movable mould assembly after opening mould, improves production efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a mold for composite injection molding of hardware parts. Background Technology

[0002] In precision manufacturing, composite injection molding technology combining hardware and plastics is widely used in electronics, automobiles, and home appliances. By molding hardware (mostly nuts) and engineering plastics into one piece, structural reinforcement and functional integration are achieved, facilitating the installation of plastic products and avoiding the chipping of threads caused by directly tapping or screwing into plastic products.

[0003] In composite injection molding, the hardware parts need to be pre-installed within the mold cavity. Therefore, a support structure is required within the injection mold to stably support the hardware parts. However, existing support structures are usually single-sided. The uneven hydrodynamic forces generated when high-pressure molten plastic is injected into the mold cavity can exert lateral thrust on the hardware parts, causing them to shift or deform. Although some molds use double-sided support structures, these often result in difficulties in separating the hardware parts from the support structure during mold opening, leading to demolding problems.

[0004] In view of this, this application proposes a hardware composite injection mold to solve the above problems. Utility Model Content

[0005] The purpose of this application is to provide a mold for composite injection molding of metal parts, which can stably support the metal parts, prevent the metal parts from shifting or deforming during the injection molding process, and ensure that the metal parts can be smoothly separated from the supporting structure after the mold is opened, so as to achieve smooth demolding of the product.

[0006] The technical solution adopted by this utility model is: a mold for composite injection molding of hardware parts, including a fixed mold assembly, a moving mold assembly, hardware parts, a positioning support mechanism for positioning and supporting the hardware parts, and an ejection and demolding mechanism. When the mold is closed, the fixed mold assembly and the moving mold assembly cooperate to form a molding cavity for injection molding of the product, and the hardware parts are fixed in the molding cavity by the positioning support mechanism.

[0007] The positioning support mechanism includes a first support rod and a second support rod. The hardware is provided with a positioning groove. One end of the first support rod is fixedly connected to the fixed mold assembly, and the other end extends along the mold opening direction into the positioning groove and abuts against the bottom of the positioning groove. The second support rod is arranged opposite to the first support rod. One end of the second support rod is fixedly connected to the moving mold assembly, and the other end extends along the mold closing direction into the forming cavity and abuts against the side of the hardware away from the positioning groove.

[0008] The ejection and demolding mechanism is used to eject the product from the moving mold assembly after the mold is opened, thereby realizing the ejection and demolding of the product.

[0009] Optionally, the fixed mold assembly includes a fixed mold panel, a fixed mold plate, and a fixed mold core, and the moving mold assembly includes a moving mold base plate, a moving mold plate, and a moving mold core. The end of the first support rod away from the forming mold cavity is fixedly connected to the fixed mold core, and the end of the second support rod away from the forming mold cavity passes through the moving mold core and is fixedly connected to the moving mold base plate.

[0010] Optionally, the first support rod includes a rod portion and a positioning portion for extending into the positioning groove and adapted to the size of the positioning groove.

[0011] Optionally, when the diameter of the positioning part is smaller than the diameter of the rod part, and the positioning part extends into the positioning groove and abuts against the bottom of the positioning groove, the end of the rod part away from the fixed mold core abuts against the outside of the positioning groove opening.

[0012] Optionally, the ejection and demolding mechanism includes a moving mold push plate movably disposed between the moving mold base plate and the moving mold plate, an ejector plate disposed on the moving mold push plate, and a first inclined ejector and a second inclined ejector fixed and symmetrically disposed on the ejector plate. The moving mold push plate is used to bear the driving force of the injection molding machine. The moving mold core is provided with a first inclined ejector groove and a second inclined ejector groove that correspond to and cooperate with the first inclined ejector and the second inclined ejector. The ends of the first and second inclined ejectors away from the ejector plate pass through the first inclined ejector groove and the second inclined ejector groove respectively and extend into the molding cavity.

[0013] Optionally, the ejection and demolding mechanism further includes two mounting seats fixedly mounted on the ejector plate, with the ends of the first and second inclined ejector rods away from the molding cavity slidably connected to the two mounting seats respectively.

[0014] Optionally, the ejection and demolding mechanism further includes two guide seats disposed on the moving mold plate. Both guide seats are located between the moving mold core and the ejector plate. Each guide seat has a guide groove for the first and second inclined ejector rods to pass through.

[0015] Optionally, multiple guide pillars are provided between the moving template and the moving template base plate. The moving template push plate and the ejector plate are provided with through holes for the guide pillars to pass through. The guide pillars are used to guide the moving template push plate and the ejector plate to move relative to the moving template base plate in a direction closer to or farther away from the moving template.

[0016] Optionally, the top rod plate is further provided with a top rod, one end of which is fixedly connected to the top rod plate, and the other end of which passes through the moving template and is flush with or partially protrudes from the upper surface of the moving template. A reset spring for driving the top rod plate to reset is wound around the top rod, and the two ends of the reset spring abut against the top rod plate and the moving template, respectively.

[0017] Optionally, the mold further includes a gating system, which includes a sprue bushing on the fixed mold plate for communicating with the nozzle of the injection molding machine, a runner on the fixed mold plate, and a sprue channel on the fixed mold core that communicates with the runner. The sprue bushing has a sprue inlet channel that communicates with the runner. During injection molding, molten plastic enters the sprue bushing from the nozzle of the injection molding machine, enters the runner through the sprue inlet channel, and finally enters the molding cavity through the sprue channel.

[0018] After adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0019] This application provides a mold for composite injection molding of hardware parts, including a fixed mold assembly, a moving mold assembly, hardware parts, a positioning support mechanism, and an ejection and demolding mechanism. These parts work together to achieve stable support and smooth demolding of the hardware parts during the injection molding process. The double-sided support of the first and second support rods effectively prevents displacement or deformation of the hardware parts during high-pressure molten plastic injection. Simultaneously, the ejection and demolding mechanism ensures that the product can be smoothly ejected from the moving mold assembly after mold opening, improving production efficiency and product quality. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0022] Figure 2 This is a cross-sectional view of this embodiment;

[0023] Figure 3 yes Figure 2 Enlarged view of section A;

[0024] Figure 4 This is a partial cross-sectional view of this embodiment after removing the mold plate and mold core.

[0025] Explanation of reference numerals in the attached drawings: 10. Fixed mold assembly; 11. Fixed mold panel; 12. Fixed mold plate; 13. Fixed mold core; 20. Moving mold assembly; 21. Moving mold base plate; 22. Moving mold plate; 221. Guide pillar; 23. Moving mold core; 231. Sloping ejector groove; 232. Second sloping ejector groove; 30. Hardware; 31. Positioning groove; 40. Positioning support mechanism; 41. First support rod; 411. Rod part; 412. Positioning part; 4 2. Second support rod; 50. Ejection and demolding mechanism; 51. Moving mold push plate; 511. Through hole; 52. Ejector plate; 521. Ejector rod; 522. Return spring; 53. First inclined ejector rod; 54. Second inclined ejector rod; 55. Mounting base; 56. Guide seat; 561. Guide groove; 60. Molding cavity; 70. Gating system; 71. Sprue bushing; 711. Inlet channel; 72. Runner; 73. Sprue channel. Detailed Implementation

[0026] The following will refer to the appendix in the embodiments of this utility model. Figures 1-4 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] This embodiment provides a mold for composite injection molding of hardware parts, referring to... Figures 1-4 It includes a fixed mold assembly 10, a moving mold assembly 20, hardware 30, a positioning support mechanism 40 for positioning and supporting the hardware 30, and an ejection and demolding mechanism 50. When the mold is closed, the fixed mold assembly 10 and the moving mold assembly 20 cooperate to form a molding cavity 60 for injection molding of the product, and the hardware 30 is fixed in the molding cavity 60 by the positioning support mechanism 40.

[0030] The positioning support mechanism 40 includes a first support rod 41 and a second support rod 42. The hardware 30 is provided with a positioning groove 31. The first end of the first support rod 41 is fixedly connected to the fixed mold assembly 10, and the other end extends along the mold opening direction into the positioning groove 31 and abuts tightly against the bottom of the positioning groove 31. The second support rod 42 is arranged opposite to the first support rod 41. One end of the second support rod 42 is fixedly connected to the moving mold assembly 20, and the other end extends along the mold closing direction into the forming cavity 60 and abuts against the side of the hardware 30 away from the positioning groove 31.

[0031] The ejection and demolding mechanism 50 is used to eject the product from the moving mold assembly 20 after the mold is opened, thereby realizing the ejection and demolding of the product.

[0032] In this embodiment, the hardware 30 is a cap-shaped metal nut, and the threaded groove of the metal nut is the positioning groove 31. Before the mold is closed, the hardware 30 is sleeved on the first support rod 41, and the end of the first support rod 41 abuts against the bottom of the positioning groove 31 on the hardware 30 to achieve positioning of the hardware 30. Then the mold is closed, and the second support rod 42 abuts against the side of the hardware 30 away from the positioning groove 31, thereby achieving stable support for both sides of the hardware 30, and thus stably supporting the hardware 30 in the molding cavity 60.

[0033] Understandably, by using the first support rod 41 and the second support rod 42 to provide double-sided support for the hardware 30, the displacement and deformation of the hardware 30 during high-pressure molten plastic injection are effectively prevented, ensuring product molding quality. The structure is simple, practical, and reduces mold production costs. At the same time, the ejection and demolding mechanism 50 ensures that the product can be smoothly ejected from the moving mold assembly 20 after mold opening, thus improving production efficiency.

[0034] Furthermore, the fixed mold assembly 10 includes a fixed mold panel 11, a fixed mold plate 12, and a fixed mold core 13, and the moving mold assembly 20 includes a moving mold base plate 21, a moving mold plate 22, and a moving mold core 23. The end of the first support rod 41 away from the forming mold cavity 60 is fixedly connected to the fixed mold core 13, and the end of the second support rod 42 away from the forming mold cavity 60 passes through the moving mold core 23 and is fixedly connected to the moving mold base plate 21.

[0035] Understandably, the first support rod 41 and the second support rod 42 provide stable support to the front and rear sides of the hardware part 30 respectively when the mold is closed, ensuring the positional stability of the hardware part 30 during the high-pressure molten plastic injection process. Furthermore, the positions and lengths of the first support rod 41 and the second support rod 42 are precisely calculated to ensure a tight fit with the hardware part 30 when the mold is closed, preventing displacement and deformation of the hardware part 30 during injection molding, further guaranteeing the molding quality of the product.

[0036] Furthermore, the first support rod 41 includes a rod portion 411 and a positioning portion 412 for extending into the positioning groove 31 and adapted to the size of the positioning groove 31.

[0037] Understandably, by configuring the first support rod 41 as a rod portion 411 and a positioning portion 412 for extending into the positioning groove 31 and matching the size of the positioning groove 31, the hardware 30 can be quickly positioned with the first support rod 41, thereby improving production efficiency.

[0038] Furthermore, the diameter of the positioning part 412 is smaller than the diameter of the rod part 411, and when the positioning part 412 extends into the positioning groove 31 and abuts against the bottom of the positioning groove 31, the end of the rod part 411 away from the fixed mold core 13 abuts against the outside of the groove opening of the positioning groove 31.

[0039] Understandably, the positioning part 412 ensures the stability of the hardware part 30 during the injection molding process and facilitates the quick installation of the hardware part 30 with the mold. Setting the diameter of the positioning part 412 to be smaller than the diameter of the rod part 411 allows the positioning part 412 to easily extend into the positioning groove 31 and tightly abut against the bottom of the groove 31, effectively restricting the vertical movement of the hardware part 30 during the injection molding process. Simultaneously, the end of the rod part 411 away from the fixed mold core 13 abuts against the outside of the positioning groove 31, providing an additional support point for the hardware part 30 and further enhancing its stability during the injection molding process.

[0040] Furthermore, the ejection and demolding mechanism 50 includes a moving mold push plate 51 movably disposed between the moving mold base plate 21 and the moving mold plate 22, an ejector plate 52 disposed on the moving mold push plate 51, and a first inclined ejector 53 and a second inclined ejector 54 fixed and symmetrically disposed on the ejector plate 52. The moving mold push plate 51 is used to bear the driving force of the injection molding machine. The moving mold core 23 is provided with a first inclined ejector groove 231 and a second inclined ejector groove 232 that correspond to and cooperate with the first inclined ejector 53 and the second inclined ejector 54. The ends of the first inclined ejector 53 and the second inclined ejector 54 away from the ejector plate 52 pass through the first inclined ejector groove 231 and the second inclined ejector groove 232 respectively and then extend into the molding cavity 60.

[0041] During demolding, the injection molding machine drives the moving mold push plate 51 to move away from the moving mold base plate 21, which in turn moves the ejector plate 52. This causes the first inclined ejector 53 and the second inclined ejector 54 to smoothly push the product out of the moving mold core 23 along the path of the inclined ejector groove, thus realizing the ejection and demolding of the product and avoiding damage caused by improper demolding.

[0042] Furthermore, the ejection and demolding mechanism also includes two mounting seats 55 fixedly mounted on the ejector plate 52, and the ends of the first inclined ejector 53 and the second inclined ejector 54 away from the molding cavity 60 are respectively slidably connected to the two mounting seats 55.

[0043] Understandably, the mounting base 55 not only provides stable support for the first and second angled ejector pins 53 and 54, but also ensures their smooth movement during the ejection process. Through a sliding connection, the first and second angled ejector pins 53 and 54 can move smoothly on the mounting base 55, thereby more effectively pushing the product out of the moving mold core 23.

[0044] Furthermore, the ejection and demolding mechanism also includes two guide seats 56 provided on the moving mold plate 22. Both guide seats 56 are located between the moving mold core 23 and the ejector plate 52. Each guide seat 56 has a guide groove 561 for the first inclined ejector rod 53 and the second inclined ejector rod 54 to pass through.

[0045] Understandably, the design of the guide seat 56 further enhances the stability and guiding nature of the ejection and demolding mechanism. During demolding, the first inclined ejector pin 53 and the second inclined ejector pin 54 are not only pushed by the ejector plate 52, but also guided and supported by the guide seat 56. The opening of the guide groove 561 ensures that the inclined ejector pin 521 can move smoothly along the predetermined path, avoiding poor demolding or product damage caused by deviation or shaking. This not only improves demolding efficiency, but also ensures the quality and integrity of the product's appearance.

[0046] Furthermore, multiple guide pillars 221 are fixedly provided between the moving template 22 and the moving mold base plate 21. The two ends of the guide pillars 221 are fixedly connected to the moving template 22 and the moving mold base plate 21, respectively. The moving mold push plate 51 and the ejector plate 52 are both provided with through holes 511 for the guide pillars 221 to pass through. The guide pillars 221 are used to guide the moving mold push plate 51 and the ejector plate 52 to move relative to the moving mold base plate 21 toward or away from the moving template 22.

[0047] Guide pin 221 passes through through holes 511 on moving mold push plate 51 and ejector plate 52, and is fixedly connected to moving mold base plate 21, forming a stable guiding system, which further improves the stability and accuracy of the mold during the ejection and demolding process. When the product needs to be ejected, the moving mold push plate 51 and ejector plate 52 move smoothly away from the moving mold base plate 21 along the guide pin 221 under the action of the drive mechanism, thereby pushing the product out of the mold smoothly.

[0048] Furthermore, a top rod 521 is also provided on the top rod plate 52. One end of the top rod 521 is fixedly connected to the top rod plate 52. The other end of the top rod 521 passes through the moving template 22 and is flush with or partially protrudes from the upper surface of the moving template 22. A reset spring 522 for driving the top rod plate 52 to reset is provided around the top rod 521. The two ends of the reset spring 522 abut against the top rod plate 52 and the moving template 22, respectively.

[0049] Understandably, the return spring 522 is designed to help the ejector plate 52 and the ejector rod 521 return smoothly to their original position after the ejector rod 521 completes its ejection action, thus preparing for the next injection and demolding process.

[0050] Furthermore, the mold also includes a gating system 70, which includes a sprue bushing 71 on the fixed mold plate 11 for communicating with the nozzle of the injection molding machine, a runner 72 on the fixed mold plate 12, and a gating channel 73 on the fixed mold core 13 and communicating with the runner 72. The sprue bushing 71 has a sprue channel 711 communicating with the runner 72. During injection molding, molten plastic enters the sprue bushing 71 from the nozzle of the injection molding machine, enters the runner 72 through the sprue channel 711, and finally enters the molding cavity 60 through the gating channel 73.

[0051] During injection molding, the nozzle of the injection molding machine injects molten plastic material into the sprue bushing 71. The molten plastic material flows into the runner 72 through the inlet channel 711 of the sprue bushing 71, and finally into the molding cavity 60 through the sprue channel 73. In this process, the design of the runner 72 and the sprue channel 73 plays a key role. It can effectively and evenly distribute the molten plastic to each sprue channel 73, thereby ensuring that the plastic material can be evenly filled into the molding cavity 60, thus improving the injection molding quality and efficiency of the hardware part 30.

[0052] Working principle: When the moving mold assembly 20 and the fixed mold assembly 10 are closed, they form a molding cavity 60. The hardware part 30 is stably supported within the molding cavity 60 by the positioning support mechanism 40, preventing displacement and deformation. Simultaneously, the ejection and demolding mechanism 50 ensures that the product can be smoothly ejected from the moving mold assembly 20 after mold opening, improving production efficiency. The entire mold structure is compact and highly practical, suitable for injection molding production of various hardware parts 30.

[0053] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A mold for composite injection molding of hardware parts, characterized in that, The mold includes a fixed mold assembly (10), a moving mold assembly (20), hardware (30), a positioning support mechanism (40) for positioning and supporting the hardware (30), and an ejection and demolding mechanism (50). When the mold is closed, the fixed mold assembly (10) and the moving mold assembly (20) cooperate to form a molding cavity (60) for injection molding of the product. The hardware (30) is fixed in the molding cavity (60) by the positioning support mechanism (40). The positioning support mechanism (40) includes a first support rod (41) and a second support rod (42). The hardware (30) is provided with a positioning groove (31). One end of the first support rod (41) is fixedly connected to the fixed mold assembly (10), and the other end extends along the mold opening direction into the positioning groove (31) and abuts tightly against the bottom of the positioning groove (31). The second support rod (42) is arranged opposite to the first support rod (41). One end of the second support rod (42) is fixedly connected to the moving mold assembly (20), and the other end extends along the mold closing direction into the forming cavity (60) and abuts against the side of the hardware (30) away from the positioning groove (31). The ejection and demolding mechanism (50) is used to eject the product from the moving mold assembly (20) after the mold is opened, thereby realizing the ejection and demolding of the product.

2. The mold for composite injection molding of hardware parts according to claim 1, characterized in that, The fixed mold assembly (10) includes a fixed mold panel (11), a fixed mold plate (12), and a fixed mold core (13). The moving mold assembly (20) includes a moving mold base plate (21), a moving mold plate (22), and a moving mold core (23). The end of the first support rod (41) away from the forming mold cavity (60) is fixedly connected to the fixed mold core (13). The end of the second support rod (42) away from the forming mold cavity (60) passes through the moving mold core (23) and is fixedly connected to the moving mold base plate (21).

3. The mold for composite injection molding of hardware parts according to claim 2, characterized in that, The first support rod (41) includes a rod portion (411) and a positioning portion (412) for extending into the positioning groove (31) and adapted to the size of the positioning groove (31).

4. The mold for composite injection molding of hardware parts according to claim 3, characterized in that, The diameter of the positioning part (412) is smaller than the diameter of the rod part (411), and when the positioning part (412) extends into the positioning groove (31) and abuts against the bottom of the positioning groove (31), the end of the rod part (411) away from the fixed mold core (13) abuts against the outside of the groove opening of the positioning groove (31).

5. The mold for composite injection molding of hardware parts according to claim 2, characterized in that, The ejection and demolding mechanism includes a moving mold push plate (51) movably disposed between the moving mold base plate (21) and the moving mold plate (22), an ejector plate (52) disposed on the moving mold push plate (51), and a first inclined ejector (53) and a second inclined ejector (54) fixed and symmetrically disposed on the ejector plate (52). The moving mold push plate (51) is used to bear the driving force of the injection molding machine. The moving mold core (23) is provided with a first inclined ejector groove (231) and a second inclined ejector groove (232) corresponding to the first inclined ejector (53) and the second inclined ejector (54). The ends of the first inclined ejector (53) and the second inclined ejector (54) away from the ejector plate (52) respectively pass through the first inclined ejector groove (231) and the second inclined ejector groove (232) and then extend into the molding cavity (60).

6. The mold for composite injection molding of hardware parts according to claim 5, characterized in that, The ejection and demolding mechanism also includes two mounting seats (55) fixed on the ejector plate (52), and the ends of the first inclined ejector (53) and the second inclined ejector (54) away from the molding cavity (60) are respectively slidably connected to the two mounting seats (55).

7. The mold for composite injection molding of hardware parts according to claim 5, characterized in that, The ejection and demolding mechanism also includes two guide seats (56) on the moving mold plate (22). Both guide seats (56) are located between the moving mold core (23) and the ejector plate (52). Each guide seat (56) has a guide groove (561) for the first inclined ejector (53) and the second inclined ejector (54) to pass through.

8. The mold for composite injection molding of hardware parts according to claim 7, characterized in that, Multiple guide posts (221) are provided between the moving template (22) and the moving template base plate (21). The moving template push plate (51) and the push rod plate (52) are both provided with through holes (511) for the guide posts (221) to pass through. The guide posts (221) are used to guide the moving template push plate (51) and the push rod plate (52) to move relative to the moving template base plate (21) towards or away from the moving template (22).

9. A mold for composite injection molding of hardware parts according to claim 8, characterized in that, The top rod plate (52) is also provided with a top rod (521). One end of the top rod (521) is fixedly connected to the top rod plate (52). The other end of the top rod (521) is inserted into the moving template (22) and is flush with or partially extended from the upper surface of the moving template (22). A reset spring (522) for driving the top rod plate (522) to reset is wound around the top rod (521). The two ends of the reset spring (522) abut against the lower surface of the top rod plate (52) and the moving template (22) respectively.

10. A mold for composite injection molding of hardware parts according to claim 1, characterized in that, The mold also includes a gating system (70), which includes a sprue bushing (71) on the fixed mold panel (11) for communicating with the nozzle of the injection molding machine, a runner (72) on the fixed mold plate (12), and a gating channel (73) on the fixed mold core (13) and communicating with the runner (72). The sprue bushing (71) has a glue inlet channel (711) communicating with the runner (72). During injection molding, molten plastic enters the sprue bushing (71) from the nozzle of the injection molding machine, enters the runner (72) through the glue inlet channel (711), and finally enters the molding cavity (60) through the gating channel (73).

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