Efficient injection mold convenient to demold

Abstract

The invention relates to the technical field of injection molds, in particular to an efficient injection mold convenient to demold, which comprises a fixed mold plate and a movable mold plate, an inclined rod is arranged on the lower surface of the movable mold plate, a sliding groove is formed in the fixed mold plate, a sliding block is slidably connected to the inner surface of the sliding groove, an inclined hole is formed in the inner surface of the sliding block, and a first connecting rod is rotatably mounted on the lower surface of the sliding block; the side wall of the first connecting rod is provided with a guide groove, the inner surface of the guide groove is slidably connected with a second connecting rod, the side wall of the second connecting rod is fixedly provided with a guide column, the bottom end of the second connecting rod is rotatably provided with a push plate, the surface of the push plate is fixedly provided with an ejector rod, the outer surface of the rotating pin is provided with a limiting rod, and the inner surface of the limiting rod is embedded with a tension spring. The mold has the beneficial effects that the ejection action can be synchronized through mold opening of the mold, so that the stability of an ejected product is improved, and compared with secondary ejection, the production cycle is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of injection molds, specifically to a high-efficiency injection mold that facilitates demolding. Background Technology

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of injection molding are fast production speed, high efficiency, automated operation, a wide variety of colors and shapes, shapes ranging from simple to complex, sizes ranging from large to small, precise product dimensions, easy product updates and replacements, and the ability to produce complex-shaped parts. Injection molding is suitable for mass production and molding processing fields such as complex-shaped products.

[0003] For example, a Chinese patent discloses an injection mold that facilitates demolding, with application number CN201810963098.9. It includes a lower mold plate and an ejection mechanism. A core seat is provided on the lower mold plate. The ejection mechanism includes a top plate and a bottom plate. A first-stage ejector pin is provided on the bottom plate, penetrating vertically upward through the top plate, the lower mold plate, and the core seat. A second-stage ejector pin is provided on the top plate, penetrating vertically upward through the lower mold plate and the core seat. The ejection mechanism also includes a secondary ejection device, which includes a rocker arm on the bottom plate and a pressure bar at the bottom of the lower mold plate. In summary, when demolding the product on the core seat, it can perform secondary ejection of the injection molded product, solving the problem of small products sticking to the top of the ejector pins, which makes demolding difficult.

[0004] However, the secondary ejection mechanism requires an additional ejection hydraulic assembly. After mold opening, the ejection mechanism on the push plate ejects the molded product through the hydraulic assembly. The ejection action is not synchronized with mold opening, which affects the ejection stability, increases the production cycle, and reduces production efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency injection mold that is easy to demold, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency injection mold that facilitates demolding, comprising: a fixed template and a movable template, the lower surface of the movable template being provided with an inclined rod, the interior of the fixed template being provided with a sliding groove, the inner surface of the sliding groove being slidably connected to a slider, the inner surface of the slider being provided with an inclined hole, the lower surface of the slider being rotatably mounted with a first connecting rod, the side wall of the first connecting rod being provided with a guide groove, the inner surface of the guide groove being slidably connected to a second connecting rod, the side wall of the second connecting rod being fixedly mounted with a guide post, the bottom end of the second connecting rod being rotatably mounted with a push plate, and the surface of the push plate being fixedly mounted with a top rod; The pivot pin has a limit rod on its outer surface and a tension spring embedded on the inner surface of the limit rod. Two sets of limit blocks symmetrically arranged about the center line of the slider are fixedly installed on the surface of the moving template.

[0007] Preferably, the diagonal braces are provided in two sets, and the two sets of diagonal braces are symmetrically distributed at equal intervals about the center line of the side of the moving template, and the diagonal braces are arranged in the form of round rods.

[0008] Preferably, the slider is provided in two sets, and the two sets of sliders are symmetrically arranged about the center line of the top rod. The contact surface between the slider and the limiting block is a wedge-shaped surface that fits together.

[0009] Preferably, there are two sets of the first and second connecting rods, and the two sets of the first and second connecting rods are symmetrically distributed at equal intervals about the center line of the side of the fixed template.

[0010] Preferably, the second connecting rod slides on the inner surface of the guide groove via a guide post, and the outer diameter of the guide post is smaller than the inner diameter of the guide groove.

[0011] Preferably, the surface of the slider is provided with a clearance groove, the pivot pin is fixedly installed between the side walls of the clearance groove, and the inner wall of the inclined hole is set as an inclined surface that fits against the inclined rod.

[0012] Preferably, two sets of limiting rods are provided, and the two sets of limiting rods are symmetrically arranged about the side center line of the slider, and a base is fixedly installed on the lower surface of the fixed template.

[0013] Preferably, a female mold core is fixedly installed on the lower surface of the moving template, and a male mold core is fixedly installed on the upper surface of the fixed template, with the male mold core fitting into the female mold core.

[0014] Preferably, a guide post is fixedly installed on the upper surface of the push plate, and a spring is sleeved on the outer surface of the guide post. The guide post is slidably connected to the inner surface of the fixed template.

[0015] Preferably, the slider slides on the inner surface of the groove through the sliding engagement of the inclined rod and the inclined hole, with the inclined rod inserted into the inner surface of the inclined hole.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention proposes a high-efficiency injection mold that facilitates demolding; As the mold opens, the inclined rod rises via the moving platen. The inclined rod, through the inclined holes inside the two sets of sliders, generates a lateral pulling force on the two sets of sliders. This force causes the two sets of sliders to move away from each other within the groove, causing the second connecting rod to slide in the guide groove inside the first connecting rod via the guide post. As the two sets of sliders move towards each other, the ejector pin on the push plate pushes out the molded product. When the inclined rod rises a certain distance, the two limiting rods lose their limiting position. The tension spring inside the limiting rod causes it to rotate back to its original position in the rotating pin. Two sets of limiting rods are arranged in a straight line. The limiting blocks limit the sliding distance of the slider to prevent the slider from retracting due to gravity. When the mold is closed, the inclined rods descend with the moving platen, allowing the slider to slide and reset in the groove under the guidance of the inclined rods through the inclined holes. At the same time, when the inclined rods descend to a certain distance, they will exert a downward pushing force on the limiting rods. At this time, the limiting rods arranged in a straight line will form a "V" shape, thereby releasing the sliding limit on the slider and allowing the slider to return to its initial position. This allows the ejection action to be synchronized with the mold opening, thereby improving the stability of the ejected product. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the linkage demolding mechanism of the present invention; Figure 3 This is a side sectional view of the linkage demolding mechanism of the present invention; Figure 4 This is an exploded view of the linkage demolding mechanism of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of a portion of point A in the middle; Figure 6 For the present invention Figure 4 Enlarged view of a section at point B in the middle; Figure 7 This is a cross-sectional view of the slider limiting mechanism of the present invention; Figure 8 This is a cross-sectional view of the slider of the present invention; Figure 9 This is a cross-sectional view of the overall structure of the present invention.

[0018] In the diagram: 1. Base; 2. Fixed template; 3. Moving template; 4. Female mold core; 5. Male mold core; 6. Slide groove; 7. Angled rod; 8. Slider; 9. Angled hole; 10. Clearance groove; 11. Turning pin; 12. Limiting rod; 13. Tension spring; 14. First connecting rod; 15. Guide groove; 16. Second connecting rod; 17. Guide post; 18. Push plate; 19. Ejector rod; 20. Guide post; 21. Spring; 22. Limiting block. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1 to 9 The present invention provides a technical solution: a high-efficiency injection mold that is easy to demold; Example 1: To ensure that the ejection action of the inclined rod 7 is synchronized with the mold opening, an inclined rod 7 is provided on the lower surface of the moving mold plate 3. A sliding groove 6 is provided inside the fixed mold plate 2. A slider 8 is slidably connected to the inner surface of the sliding groove 6. An inclined hole 9 is provided on the inner surface of the slider 8. A first connecting rod 14 is rotatably mounted on the lower surface of the slider 8. A guide groove 15 is provided on the side wall of the first connecting rod 14. A second connecting rod 16 is slidably connected to the inner surface of the guide groove 15. A guide post 17 is fixedly mounted on the side wall of the second connecting rod 16. A push plate 18 is rotatably mounted on the bottom end of the second connecting rod 16. An ejector rod 19 is fixedly mounted on the surface of the push plate 18. Two sets of diagonal braces 7 are provided, and the two sets of diagonal braces 7 are symmetrically distributed at equal intervals about the center line of the side of the moving template 3. The diagonal braces 7 are round rods. Two sets of first connecting rods 14 and second connecting rods 16 are provided, and the two sets of first connecting rods 14 and second connecting rods 16 are symmetrically distributed at equal intervals about the center line of the side of the fixed template 2. The second connecting rod 16 slides on the inner surface of the guide groove 15 through the guide post 17. The outer diameter of the guide post 17 is smaller than the inner diameter of the guide groove 15. A guide post 20 is fixedly installed on the upper surface of the push plate 18. A spring 21 is sleeved on the outer surface of the guide post 20. The guide post 20 is slidably connected to the inner surface of the fixed template 2. As the mold opens, the inclined rod 7 rises through the moving template 3. The inclined rod 7, through the inclined holes 9 inside the two sets of sliders 8, generates a lateral pulling force on the two sets of sliders 8. By moving the two sets of sliders 8 in a relatively distant direction within the slide groove 6, the second connecting rod 16 slides in the guide groove 15 inside the first connecting rod 14 through the guide post 17. As the two sets of sliders 8 move towards each other, the ejector rod 19 on the push plate 18 ejects the molded product.

[0021] When ejecting the product, the upward thrust of the push plate 18 drives the guide post 20 to penetrate the inner surface of the fixed template 2, thereby compressing the spring 21 sleeved on the guide post 20. This prevents the product from shifting during ejection and serves as a guide. In addition, the spring 21 buffers the friction between the push plate 18 and the fixed template 2, thus providing a buffering effect and extending the service life of the fixed template 2.

[0022] Example 2: Based on Embodiment 1, in order to prevent the slider 8 from sliding and resetting in the groove 6 due to the gravity retraction of the ejection mechanism, a limiting rod 12 is provided on the outer surface of the pivot pin 11, and a tension spring 13 is embedded on the inner surface of the limiting rod 12. Two sets of limiting blocks 22 are fixedly installed on the surface of the moving template 3, which are symmetrically arranged about the center line of the slider 8. Two sets of sliders 8 are provided, which are symmetrically arranged about the center line of the ejector rod 19. The contact surface between the slider 8 and the limiting block 22 is a wedge-shaped surface that fits together. A clearance groove 10 is opened on the surface of the slider 8. The pivot pin 11 is fixedly installed between the side walls of the clearance groove 10. The inner wall of the inclined hole 9 is set as an inclined surface that fits together with the inclined rod 7. Two sets of limiting rods 12 are provided, which are symmetrically arranged about the side center line of the slider 8. When the inclined rod 7 rises to a certain distance, the two sets of limiting rods 12 lose the limitation of the inclined rod 7. The tension spring 13 inside the limiting rod 12 causes the limiting rod 12 to rotate back in the pivot pin 11. At this time, the two sets of limiting rods 12 are arranged in a "I" shape. The sliding distance of the slider 8 is limited by the limiting block 22 to prevent the slider 8 from retracting due to gravity.

[0023] During mold closing, the inclined rod 7 descends with the moving platen 3, causing the slider 8 to slide and reset in the slide groove 6 under the guidance of the inclined rod 7 through the inclined hole 9. At the same time, when the inclined rod 7 descends to a certain distance, it will exert a downward pushing force on the limiting rod 12. At this time, the limiting rod 12, which is arranged in a "I" shape, becomes a "V" shape, thereby releasing the sliding limit on the slider 8 and allowing the slider 8 to return to its initial position.

[0024] Working principle: In actual use, as the mold opens, the inclined rod 7 rises through the moving platen 3. The inclined rod 7, through the inclined holes 9 inside the two sets of sliders 8, generates a lateral pulling force on the two sets of sliders 8. By moving the two sets of sliders 8 in a relatively distant direction within the slide groove 6, the second connecting rod 16 slides through the guide post 17 in the guide groove 15 inside the first connecting rod 14. As the two sets of sliders 8 move towards each other, the ejector rod 19 on the push plate 18 ejects the molded product. When ejecting the product, the upward pushing force of the push plate 18 drives the guide post 20 to penetrate the inner surface of the fixed platen 2, thereby compressing the spring 21 sleeved on the guide post 20. This prevents the product from shifting during ejection and provides guidance. The spring 21 also buffers the friction between the push plate 18 and the fixed platen 2, providing cushioning and increasing the length of the fixed platen. The service life of 2 is as follows: when the inclined rod 7 rises to a certain distance, the two sets of limiting rods 12 lose the limitation of the inclined rod 7. The tension spring 13 inside the limiting rod 12 causes the limiting rod 12 to rotate back in the pivot pin 11. At this time, the two sets of limiting rods 12 are arranged in a "I" shape. The sliding distance of the slider 8 is limited by the limiting block 22 to prevent the slider 8 from shrinking back due to gravity. When the mold is closed, the inclined rod 7 lowers with the moving platen 3, causing the slider 8 to slide and reset in the slide groove 6 under the guidance of the inclined rod 7 through the inclined hole 9. At the same time, when the inclined rod 7 falls to a certain distance, it will generate a downward pushing force on the limiting rod 12. At this time, the limiting rods 12 arranged in a "I" shape become a "V" shape, thereby releasing the sliding limitation of the slider 8 and allowing the slider 8 to return to the initial position. Thus, the ejection action can be synchronized through the mold opening, thereby improving the stability of the ejected product.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high efficiency injection mold facilitating easy mold release, characterized by: Include: The fixed mold plate (2) and the movable mold plate (3), the lower surface of the movable mold plate (3) is provided with a inclined rod (7), the inside of the fixed mold plate (2) is provided with a sliding groove (6), the inner surface of the sliding groove (6) is slidably connected with a sliding block (8), the inner surface of the sliding block (8) is provided with an inclined hole (9), the lower surface of the sliding block (8) is rotatably installed with a first connecting rod (14), the side wall of the first connecting rod (14) is provided with a guide groove (15), the inner surface of the guide groove (15) is slidably connected with a second connecting rod (16), the side wall of the second connecting rod (16) is fixedly installed with a guide column (17), the bottom end of the second connecting rod (16) is rotatably installed with a push plate (18), the surface of the push plate (18) is fixedly installed with a top rod (19); The rotating pin (11) is provided with a limiting rod (12) on the outer surface, the inner surface of the limiting rod (12) is embedded with a tension spring (13), the surface of the movable mold plate (3) is fixedly installed with two groups of limiting blocks (22) which are symmetrically arranged about the center line of the sliding block (8).

2. The high efficiency injection mold with easy mold release of claim 1, wherein: The inclined rod (7) is provided with two groups, the two groups of inclined rods (7) are equidistantly and symmetrically arranged about the center line of the side edge of the movable mold plate (3), and the inclined rod (7) is in the form of a round rod.

3. The high efficiency injection mold with easy mold release of claim 1, wherein: The sliding block (8) is provided with two groups, the two groups of sliding blocks (8) are symmetrically arranged about the center line of the top rod (19), and the contact surface of the sliding block (8) and the limiting block (22) is in the form of a wedge surface.

4. The high efficiency injection mold with easy mold release of claim 1, wherein: The first connecting rod (14) and the second connecting rod (16) are provided with two groups, the two groups of first connecting rods (14) and second connecting rods (16) are equidistantly and symmetrically arranged about the center line of the side edge of the fixed mold plate (2).

5. The high efficiency injection mold with easy mold release of claim 1, wherein: The second connecting rod (16) slides on the inner surface of the guide groove (15) through the guide column (17), and the outer diameter of the guide column (17) is smaller than the inner diameter of the guide groove (15).

6. The high efficiency injection mold with easy mold release of claim 1, wherein: The surface of the sliding block (8) is provided with an empty slot (10), the rotating pin (11) is fixedly installed between the side walls of the empty slot (10), and the inner wall of the inclined hole (9) is provided with an inclined surface which is in close contact with the inclined rod (7).

7. The high efficiency injection mold with easy mold release of claim 1, wherein: The limiting rod (12) is provided with two groups, the two groups of limiting rods (12) are symmetrically arranged about the center line of the side edge of the sliding block (8), and the lower surface of the fixed mold plate (2) is fixedly installed with a base (1).

8. The high efficiency injection mold with easy mold release of claim 1, wherein: The lower surface of the movable mold plate (3) is fixedly installed with a female die core (4), and the upper surface of the fixed mold plate (2) is fixedly installed with a male die core (5), the male die core (5) is in close contact with the female die core (4).

9. The high efficiency injection mold with easy mold release of claim 1, wherein: The upper surface of the push plate (18) is fixedly installed with a guide column (20), the outer surface of the guide column (20) is sleeved with a spring (21), and the guide column (20) is slidably connected with the inner surface of the fixed mold plate (2).

10. The high efficiency injection mold with easy mold release of claim 1, wherein: The sliding block (8) slides on the inner surface of the sliding groove (6) through the sliding cooperation of the inclined rod (7) and the inclined hole (9), and the inclined rod (7) is inserted into the inner surface of the inclined hole (9).

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