Injection mold facilitating ejection of small-sized products
By coordinating the design of the moving mold assembly and the fixed mold assembly, and utilizing the cooperation of the push rod and the push plate, as well as the adaptation of the abutment flange, the problem of uneven force distribution during the ejection process of small-sized products is solved, achieving a highly efficient and damage-free ejection effect, and improving product quality and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN CHENGYUAN TECH CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-06-19
AI Technical Summary
Traditional ejection mechanisms are unable to effectively eject small-sized products, resulting in uneven ejection force distribution that causes warping and product damage.
The design employs a collaborative approach between the moving mold assembly and the fixed mold assembly. Through the cooperation of the push rod and the push plate, and by adapting the abutment flange to the bottom edge of the product, stable ejection of small-sized products is achieved. Combined with the movement mechanism of the inclined guide post and the slider, the ejection force is ensured to be evenly distributed.
It enables efficient and non-destructive ejection of small-sized products, improving product quality and production efficiency, and reducing warping and damage.
Smart Images
Figure CN224374772U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of injection mold technology, and more specifically to an injection mold that facilitates the ejection of small-sized products. Background Technology
[0002] In the field of injection molding, the design of the ejection mechanism directly affects product quality and production efficiency. Traditional ejection mechanisms (such as ejector pins, push plates, or pneumatic ejection) rely on the contact force between rigid components and the product surface to achieve demolding.
[0003] However, when traditional ejection mechanisms are applied to small-sized products (such as precision electronic components, miniature structural components, etc.), the force application position of the traditional ejector pin is fundamentally in conflict with the product's structural characteristics, making it difficult for the ejector pin to eject the small-sized components completely.
[0004] Specifically, small-sized products have insufficient side wall projection area, making it impossible to provide an effective support surface for ejection. If ejector pins are placed at the bottom of small-sized products, when there are dense columns, reinforcing ribs, or irregular structures at the bottom of the product, the ejector pins need to avoid these features, resulting in fragmentation of the area where pins can be placed. Conventional ejector pins are too large to be placed in enough numbers in the narrow space at the bottom of small-sized products, resulting in uneven distribution of ejection force and causing warping deformation.
[0005] In view of this, this application proposes an injection mold that facilitates the ejection of small-sized products. Summary of the Invention
[0006] The purpose of this application is to provide an injection mold that facilitates the ejection of small-sized products, which has the characteristics of being able to eject small-sized products completely, reducing damage during the ejection process, and improving product quality and production efficiency.
[0007] The technical solution adopted in this invention is: an injection mold for easy ejection of small-sized products, including a fixed mold assembly and a moving mold assembly. The moving mold assembly includes a base plate, a support plate fixedly disposed above the base plate, a push plate movably disposed between the base plate and the support plate for bearing the driving force of the injection molding machine, a moving mold plate disposed on the support plate, and a moving mold core disposed inside the moving mold plate. An insert seat is fixedly disposed inside the support plate, and a molding insert extending into the moving mold core is provided on the insert seat.
[0008] A push rod plate is fixedly mounted on the support plate, and a push rod is fixedly mounted on the push rod plate. The end of the push rod away from the push rod plate passes through the support plate and is fixedly connected to the moving template.
[0009] After the mold is opened, the drive rod of the injection molding machine drives the push plate to move away from the base plate, which in turn moves the push rod plate, causing the push rod to push the moving mold plate, which in turn moves the moving mold core away from the support plate, so that the product in the moving mold core is separated from the molding insert.
[0010] Optionally, the moving mold core is provided with an abutting protrusion that is adapted to the bottom edge of the product. When the mold is opened, the abutting protrusion abuts against the bottom edge of the product and drives the product to separate from the molding insert.
[0011] Optionally, at least one fixed post is vertically arranged on the base plate, and the push plate and the push rod plate are both provided with insertion holes adapted to the fixed post. One end of the fixed post is fixedly connected to the base plate, and the other end of the fixed post passes through the insertion hole and is fixedly connected to the side of the support plate facing the base plate.
[0012] Optionally, a return spring is provided around the push rod, with the two ends of the return spring abutting against the push rod plate and the support plate, respectively.
[0013] Optionally, the moving mold assembly further includes two pads, which are symmetrically arranged between the base plate and the support plate, and the push plate and the push rod plate are located between the two pads.
[0014] Optionally, the fixed mold assembly includes a panel, a fixed template, and a fixed mold core. A first large slider and a second large slider are slidably disposed on the moving template. At least one set of inner sliders is slidably disposed on the moving mold core. The inner slider set includes a first small slider and a second small slider. When the mold is closed, the moving mold core, the fixed mold core, the first large slider, the second large slider, the first small slider, the second small slider, and the molding insert cooperate to form a molding cavity for injection molding the product.
[0015] Optionally, the fixed template is provided with an inclined guide post group for driving the first large slider and the second large slider to move toward each other or away from each other. The inclined guide post group includes at least two inclined guide posts, and the first large slider and the second large slider are provided with inclined guide grooves that cooperate with the inclined guide posts.
[0016] When the mold is opened, the inclined guide post and the inclined guide groove cooperate to drive the first large slider and the second large slider to move towards each other or away from each other, so as to facilitate the ejection and demolding of the product.
[0017] Optionally, the fixed mold core is further provided with a core-pulling seat for driving the first small slider and the second small slider to move toward each other or away from each other, so as to separate the first small slider and the second small slider from the product. The distance between the two sides of the core-pulling seat is gradually reduced from the direction closer to the fixed mold core toward the direction closer to the moving mold core. The two sides of the core-pulling seat are provided with two sliding grooves that respectively cooperate with the first small slider and the second small slider.
[0018] Optionally, the bottom sides of the first and second small sliders are provided with a first limiting groove and a second limiting groove, and the moving mold core is provided with a limiting post for cooperating with the first and second limiting grooves.
[0019] Optionally, the number of molding inserts on the insert base is at least four, the number of the inner slider group consisting of the first small slider and the second small slider, and the number of the core-pulling base are also at least four, so as to form at least four molding cavities when the mold is closed.
[0020] After adopting the above technical solution, the beneficial effects of the present invention are as follows:
[0021] This application, after the moving mold assembly and the fixed mold assembly separate (i.e., after mold opening), uses the injection molding machine's drive rod to move the ejector plate away from the base plate, which in turn moves the ejector plate, causing the ejector rod to push the moving mold plate to move. This, in turn, moves the moving mold core away from the support plate, thereby separating the product inside the moving mold core from the molding insert, thus achieving ejection and demolding of the product. This solves the technical problems of small-sized products being easily damaged during ejection and warping deformation caused by uneven ejection force distribution. Through the synergistic effect of the moving mold assembly and the fixed mold assembly, especially the precise coordination of components such as the moving mold core, molding insert, and ejector rod, efficient and non-destructive ejection of small-sized products is achieved. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the overall structure of this embodiment;
[0024] Figure 2 This is a partial sectional view of this embodiment;
[0025] Figure 3 This is a cross-sectional view used in this embodiment to illustrate the mating relationship between the inclined guide post and the inclined guide groove;
[0026] Figure 4This is a schematic diagram illustrating the cooperation relationship between the core-pulling seat, the first small slider, and the second small slider in this embodiment;
[0027] Figure 5 This is a display diagram showing the first and second small sliders after they have been separated from the product in this embodiment;
[0028] Figure 6 yes Figure 5 Enlarged view of section A;
[0029] Figure 7 This is a diagram showing the contact point of the abutting flange against the bottom of the product in this embodiment;
[0030] Figure 8 This is a diagram illustrating the process in this embodiment where the abutting flange lifts the product and separates it from the molded insert.
[0031] Explanation of reference numerals in the attached drawings: 100, Product; 10, Moving mold assembly; 11, Base plate; 111, Fixed post; 12, Support plate; 121, Insert holder; 122, Molding insert; 13, Push plate; 14, Moving mold plate; 141, First large slider; 142, Second large slider; 143, Angled guide groove; 15, Moving mold core; 151, Abutting flange; 152, First small slider; 153, Second small slider; 154, First limiting groove; 155, Second limiting groove; 156, Limiting post; 16, Push rod plate; 161, Push rod; 162, Return spring; 17, Pad plate; 20, Fixed mold assembly; 21, Panel; 22, Fixed mold plate; 221, Angled guide post; 23, Fixed mold core; 231, Core pull holder. Detailed Implementation
[0032] The following will refer to the appendices in the embodiments of the present invention. Figures 1-8 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0033] It should be noted that if the embodiments of the present invention 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.
[0034] Furthermore, if the embodiments of this invention 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, a feature 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 invention.
[0035] This embodiment provides an injection mold that facilitates the ejection of small-sized products. (Refer to...) Figures 1-8 The system includes a fixed mold assembly 20 and a moving mold assembly 10. The moving mold assembly 10 includes a base plate 11, a support plate 12 fixedly disposed above the base plate 11, a push plate 13 movably disposed between the base plate 11 and the support plate 12 for bearing the driving force of the injection molding machine, a moving mold plate 14 disposed on the support plate 12, and a moving mold core 15 disposed inside the moving mold plate 14. An insert seat 121 is fixedly disposed inside the support plate 12, and a molding insert 122 extending into the moving mold core 15 is provided on the insert seat 121.
[0036] A push rod plate 16 is fixedly installed on the support plate 12, and a push rod 161 is fixedly installed on the push rod plate 16. The end of the push rod 161 away from the push rod plate 16 passes through the support plate 12 and is fixedly connected to the moving template 14.
[0037] After the moving mold assembly 10 separates from the fixed mold assembly 20, the drive rod of the injection molding machine drives the push plate 13 to move away from the base plate 11, which in turn drives the push rod plate 16 to move closer to the support plate 12. This causes the push rod 161 to push the moving mold plate 14 relative to the support plate 12 (since the support plate 12 is fixedly connected to the base plate 11, it will not move). This, in turn, causes the moving mold core 15, which is fixedly connected to the moving mold plate 14, to move away from the support plate, thereby separating the product 100 inside the moving mold core 15 from the molding insert 122, achieving ejection and demolding of the product 100. This solves the problem of difficulty in ejecting and demolding small-sized products 100 in the prior art, reduces damage to the product 100 during ejection, and improves the quality of the product 100 and production efficiency.
[0038] Furthermore, referring to Figures 6-8 The moving mold core 15 is provided with an abutting flange 151, which is adapted to the bottom edge of the product 100. When the mold is opened, the abutting flange 151 abuts against the bottom edge of the product 100 and drives the product 100 to separate from the molding insert 122.
[0039] Understandably, the abutment flange 151 provides a more stable push for product 100 to be demolded, preventing product 100 from shifting or getting stuck during ejection, thus further improving ejection efficiency and product 100 quality. Simultaneously, the matching design between the abutment flange 151 and the bottom edge of product 100 ensures a uniform distribution of ejection force, reducing deformation or damage to product 100 caused by uneven ejection force.
[0040] Furthermore, at least one fixing post 111 is vertically arranged on the base plate 11. Both the push plate 13 and the push rod plate 16 have insertion holes adapted to the fixing post 111. One end of the fixing post 111 is fixedly connected to the base plate 11, and the other end passes through the insertion hole and is fixedly connected to the side of the support plate 12 facing the base plate 11. In this embodiment, there are two fixing posts 111, symmetrically arranged between the base plate 11 and the support plate. In other embodiments, the number of fixing posts 111 can also be different, and no limitation is made here.
[0041] Understandably, by setting the fixed column 111, the push plate 13 and the push rod plate 16 can be limited and guided, ensuring the stability and accuracy of the push plate 13 and the push rod plate 16 during the movement process, thereby improving the ejection efficiency of the mold and the quality of the product 100.
[0042] Furthermore, a return spring 162 is provided around the push rod 161. The return spring 162 is arranged along the length direction of the push rod 161, and the two ends of the return spring 162 abut against the push rod plate 16 and the support plate 12, respectively.
[0043] Understandably, the return spring 162 is designed to reset the push plate 16 and push plate 13 after the push rod 161 moves the moving mold plate 14 and moving mold core 15, facilitating the next injection ejection operation. Simultaneously, the return spring 162 also acts as a buffer, reducing the impact on the push rod 161 during its movement, protecting the mold components, and extending the mold's lifespan.
[0044] In addition, the moving mold assembly 10 also includes two backing plates 17. The two backing plates 17 are symmetrically arranged between the base plate 11 and the support plate 12, and the push plate 13 and the push rod plate 16 are located between the two backing plates 17. The arrangement of the backing plates 17 can enhance the structural strength of the mold, improve the load-bearing capacity and stability of the mold, and ensure the normal operation of the mold during the injection molding process.
[0045] Furthermore, the fixed mold assembly 20 includes a panel 21, a fixed template 22, and a fixed mold core 23. A first large slider 141 and a second large slider 142 are slidably disposed on the moving template 14. At least one set of inner slider groups are slidably disposed on the moving mold core 15. The inner slider group includes a first small slider 152 and a second small slider 153. When the mold is closed, the moving mold core 15, the fixed mold core 23, the first large slider 141, the second large slider 142, the first small slider 152, the second small slider 153, and the molding insert 122 cooperate to form a molding cavity for injection molding the product 100.
[0046] Furthermore, the fixed template 22 is provided with a set of inclined guide posts 221 for driving the first large slider 141 and the second large slider 142 to move toward or away from each other. The set of inclined guide posts 221 includes at least two inclined guide posts 221. The first large slider 141 and the second large slider 142 are provided with inclined guide grooves 143 for cooperating with the inclined guide posts 221.
[0047] When the mold is opened, driven by the injection molding machine, the moving mold assembly 10 and the fixed mold assembly 20 move away from each other. Through the cooperation between the inclined guide post 221 and the inclined guide groove 143, the first large slider 141 and the second large slider 142 are driven to move away from each other, thereby realizing the mold opening of the product 100, so as to facilitate the subsequent ejection and demolding of the product 100.
[0048] Furthermore, the fixed mold core 23 is provided with a core-pulling seat 231 for driving the first small slider 152 and the second small slider 153 to move toward each other or away from each other, so as to separate the first small slider 152 and the second small slider 153 from the product 100. The distance between the two sides of the core-pulling seat 231 gradually decreases from the direction closer to the fixed mold core 23 toward the direction away from the moving mold core 15. The two sides of the core-pulling seat 231 are provided with two slide grooves that respectively slide and cooperate with the first small slider 152 and the second small slider 153.
[0049] During mold opening, driven by the injection molding machine, the moving mold assembly 10 and the fixed mold assembly 20 move away from each other. On the one hand, with the cooperation of the inclined guide post 221 and the inclined guide groove 143, the first large slider 141 and the second large slider 142 move away from each other. On the other hand, with the cooperation of the core-pulling seat 231 and the first small slider 152 and the second small slider 153, the first small slider 152 and the second small slider 153 are driven to move away from each other, thereby realizing the complete mold opening of the product 100.
[0050] Furthermore, the bottom sides of the first small slider 152 and the second small slider 153 are each provided with a first limiting groove 154 and a second limiting groove 155, and the moving mold core 15 is provided with a limiting post 156 for cooperating with the first limiting groove 154 and the second limiting groove 155. In this embodiment, the first limiting groove 154 and the second limiting groove 155 are both circular, and the top of the limiting post 156 is provided with a circular abutment portion that matches the first limiting groove 154 and the second limiting groove 155.
[0051] During mold closing, the limiting post 156 abuts against the first limiting groove 154 of the first small slider 152 and the second small slider 153, thereby limiting the first small slider 152 and the second small slider 153 and preventing them from shifting during injection molding, thus ensuring the molding quality of the product 100. During mold opening, the core-pulling seat 231 drives the first small slider 152 and the second small slider 153 to move away from each other. When the second limiting groove 155 sliding onto the first small slider 152 and the second small slider 153 abuts against the limiting groove, the mold opening is completed. The limiting post 156 again limits the first small slider 152 and the second small slider 153, preventing them from shaking or shifting after mold opening, ensuring the stability of the mold structure and the smooth progress of subsequent ejection operations.
[0052] Furthermore, the number of molded inserts 122 on the insert base 121 is at least four, the number of the inner slider group consisting of the first small slider 152 and the second small slider 153, and the number of core-pulling bases 231 are also at least four.
[0053] By adopting the above settings, at least four molding cavities can be formed simultaneously during mold closing, thereby enabling synchronous injection molding of multiple small-sized products 100, which greatly improves production efficiency and mold utilization.
[0054] Working principle: After injection molding is completed, the injection molding machine drives the moving mold assembly 10 to separate from the fixed mold assembly 20. At this time, the inclined guide post 221 cooperates with the inclined guide groove 143 on the first large slider 141 and the second large slider 142 to drive the first large slider 141 and the second large slider 142 to move away from each other. At the same time, the core-pulling seat 231 drives the first small slider 152 and the second small slider 153 to also move away from each other, thereby opening the molding cavity and allowing the product 100 to be ejected from the molding cavity.
[0055] Subsequently, the drive rod of the injection molding machine drives the push plate 13 to move away from the base plate 11. The push plate 13 drives the push rod plate 16 and the push rod 161 to move. The push rod 161 pushes the moving mold plate 14 and the moving mold core 15 to move away from the support plate 12. The abutting flange 151 inside the moving mold core 15 abuts against the bottom edge of the product 100 and drives the product 100 to completely separate from the molding insert 122, realizing the ejection and demolding of the product 100.
[0056] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.
Claims
1. An injection mold for easy ejection of small-sized products, characterized in that, The system includes a fixed mold assembly (20) and a moving mold assembly (10). The moving mold assembly (10) includes a base plate (11), a support plate (12) fixedly disposed above the base plate (11), a push plate (13) movably disposed between the base plate (11) and the support plate (12) for bearing the driving force of the injection molding machine, a moving template (14) disposed on the support plate (12), and a moving mold core (15) disposed inside the moving template (14). An insert seat (121) is fixedly disposed inside the support plate (12), and a molding insert (122) extending into the moving mold core (15) is provided on the insert seat (121). A push rod plate (16) is fixedly installed on the support plate (12), and a push rod (161) is fixedly installed on the push rod plate (16). The end of the push rod (161) away from the push rod plate (16) passes through the support plate (12) and is fixedly connected to the moving template (14). After the mold is opened, the drive rod of the injection molding machine drives the push plate (13) to move away from the base plate (11), which in turn drives the push rod plate (16) to move, so that the push rod (161) pushes the moving template (14), which in turn drives the moving mold core (15) to move away from the support plate (12), so that the product (100) in the moving mold core (15) is separated from the molding insert (122).
2. The injection mold for easy ejection of small-sized products according to claim 1, characterized in that, The moving mold core (15) is provided with an abutting flange (151), which is adapted to the bottom edge of the product (100). When the mold is opened, the abutting flange (151) abuts against the bottom edge of the product (100) and drives the product (100) to separate from the molding insert (122).
3. The injection mold for easy ejection of small-sized products according to claim 1, characterized in that, At least one fixed post (111) is vertically arranged on the base plate (11). The push plate (13) and the push rod plate (16) are both provided with insertion holes that are compatible with the fixed post (111). One end of the fixed post (111) is fixedly connected to the base plate (11), and the other end of the fixed post (111) passes through the insertion hole and is fixedly connected to the side of the support plate (12) facing the base plate (11).
4. The injection mold for easy ejection of small-sized products according to claim 1, characterized in that, A return spring (162) is wound around the push rod (161), and the two ends of the return spring (162) abut against the push rod plate (16) and the support plate (12) respectively.
5. The injection mold for easy ejection of small-sized products according to claim 1, characterized in that, The moving mold assembly (10) also includes a pad (17), and there are two pads (17). The two pads (17) are symmetrically arranged between the base plate (11) and the support plate (12), and the push plate (13) and the push rod plate (16) are located between the two pads (17).
6. The injection mold for easy ejection of small-sized products according to claim 1, characterized in that, The fixed mold assembly (20) includes a panel (21), a fixed template (22), and a fixed mold core (23). A first large slider (141) and a second large slider (142) are slidably arranged on the moving template (14). At least one set of inner sliders is slidably arranged on the moving mold core (15). The inner sliders include a first small slider (152) and a second small slider (153). When the mold is closed, the moving mold core (15), the fixed mold core (23), the first large slider (141), the second large slider (142), the first small slider (152), the second small slider (153), and the molding insert (122) cooperate to form a molding cavity for injection molding the product (100).
7. The injection mold for easy ejection of small-sized products according to claim 6, characterized in that, The fixed template (22) is provided with a group of inclined guide posts (221) for driving the first large slider (141) and the second large slider (142) to move toward each other or away from each other. The group of inclined guide posts (221) includes at least two inclined guide posts (221). The first large slider (141) and the second large slider (142) are provided with inclined guide grooves (143) that cooperate with the inclined guide posts (221). When the mold is opened, the inclined guide post (221) and the inclined guide groove (143) cooperate to drive the first large slider (141) and the second large slider (142) to move towards each other or away from each other, so as to facilitate the ejection and demolding of the product (100).
8. The injection mold for easy ejection of small-sized products according to claim 7, characterized in that, The fixed mold core (23) is also provided with a core-pulling seat (231) for driving the first small slider (152) and the second small slider (153) to move towards each other or away from each other, so that the first small slider (152) and the second small slider (153) are separated from the product (100). The distance between the two sides of the core-pulling seat (231) gradually decreases from the direction closer to the fixed mold core (23) to the direction closer to the moving mold core (15). The two sides of the core-pulling seat (231) are provided with two sliding grooves that respectively slide and cooperate with the first small slider (152) and the second small slider (153).
9. The injection mold for easy ejection of small-sized products according to claim 8, characterized in that, The bottom sides of the first small slider (152) and the second small slider (153) are provided with a first limiting groove (154) and a second limiting groove (155), and the moving mold core (15) is provided with a limiting post (156) for cooperating with the first limiting groove (154) and the second limiting groove (155).
10. The injection mold for easy ejection of small-sized products according to claim 8, characterized in that, The number of molding inserts (122) on the insert base (121) is at least four, the number of the inner slider group composed of the first small slider (152) and the second small slider (153) and the number of the core-pulling base (231) are also at least four, so as to form at least four molding cavities when the mold is closed.