Die structure convenient for forcibly removing inverted buckle

Abstract

The utility model relates to the technical field of mold demolding, in particular to a mold structure convenient for forcibly demolding an inverted buckle, which comprises a base, a mold core and an ejection demolding assembly, the base is used for fixing the mold core, and the ejection demolding assembly is in sliding connection with the base and is used for pushing out and demolding a product in the mold core. The ejection demolding assembly comprises a supporting module, an ejector pin, a movable insert and an insert pin, the supporting module is arranged in the base and used for guiding the ejector pin to move, and the ejector pin is fixedly connected with the supporting module and used for separating the edge of a product from the mold core. The problem that an existing back-off mold adopting a sliding block or inclined top structure is complex is effectively solved. Compared with a traditional complex sliding block and inclined top structure, the mold structure for forcibly removing the inverted buckle is simple and convenient. The manufacturing cost of the mold can be saved, and the stability of the mold can be enhanced. The damage cannot easily occur. And the service life of the mold can be prolonged, and the yield of the mold is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mold demoulding, in particular to a mold structure that is convenient for strong demoulding of undercuts. Background Art

[0002] Undercuts are a common design feature in plastic product design. When creating injection molds, sliders or lifters are typically used to create these undercuts. However, these structures are complex and, due to travel, can cause collisions between the two lifters. Therefore, we developed a mold structure with a strong undercut release feature, enabling a more convenient way to remove the undercut. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a mold structure that is easy to force-remove the undercut, which effectively solves the problem that the existing undercut mold using a slider or a slanted top structure is relatively complicated.

[0004] The technical solution provided by the utility model is a mold structure that is convenient for strong removal of undercuts, comprising a base, a mold core, and an ejector assembly. The base is used to fix the mold core, and the ejector assembly is slidably connected to the base to push the product out of the mold core.

[0005] The ejection and demolding assembly includes a support module, an ejector pin, a movable insert and an insert pin. The support module is arranged in the base to guide the movement of the ejector pin. The ejector pin is fixedly connected to the support module to separate the edge of the product from the mold core. One end of the movable insert is located in the base and can be displaced relative to the base. The other end of the movable insert passes through the mold core for internal molding of the product. The distance that the ejector pin moves out of the mold core is greater than the distance that the movable insert moves out of the mold core. The insert pin is arranged in the support module to limit the moving distance of the support module.

[0006] Preferably, one end of the movable insert located in the base is D-shaped, and the base is provided with a sliding groove for accommodating the end of the movable insert and fitting with the end of the movable insert. The movable insert is inserted into the sliding groove and slidably connected to the sliding groove, and an insert for closing the sliding groove opening is fixed on the base by bolts.

[0007] Preferably, a limiting groove is provided on the outer edge surface of the movable insert, and the end of the insert pin is inserted into the limiting groove to limit the support module.

[0008] Preferably, the base is provided with a bottom plate, a support plate and a lower template in sequence along the height direction, the support module is located in the space formed by the support plate, there is a buffer space between the support module and the lower template, the support module is slidably connected to the lower template via a guide column, and the guide column is provided with a spring located between the support module and the lower template.

[0009] Preferably, a through hole is provided on the bottom plate, and the through hole is used to accommodate a hydraulic column that pushes the support module to move.

[0010] The beneficial effects of the utility model are:

[0011] The utility model adopts a movable insert, a virtual position arranged at a movable insert hanging platform, a limiting groove and an inserting pin on the movable insert, so that the product with the undercut glue position can be demoulded after leaving the range of the mold steel, thereby protecting the product during the demoulding process.

[0012] Furthermore, the mold structure of the strong release undercut in the present invention is simple and convenient, compared to the traditional complex slider and inclined top structure. It can save mold manufacturing costs while enhancing mold stability and making it less susceptible to damage. This can extend the mold's service life and increase mold production, among other advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the cutaway main structure of the present utility model;

[0015] Figure 3 This utility model Figure 2 A magnified view of middle A;

[0016] Figure 4 This is a schematic diagram of the cross-section structure of the utility model after the ejector pin and the movable insert are pushed out;

[0017] Figure 5 It is a cross-sectional schematic diagram of the present invention in which the ejector continues to be pushed out after the movable insert is limited;

[0018] In the figure, 1-mold core; 2-support module; 3-ejector pin; 4-movable insert; 5-inserting pin; 6-sliding groove; 7-inserted block; 8-limiting groove; 9-base plate; 10-support plate; 11-lower template; 12-guide column; 13-spring; 14-through hole. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Refer to the instruction manual Figure 1-5A mold structure that is convenient for strong removal of undercuts includes a bottom plate 9, a support plate 10, a lower template 11, a mold core 1 and an ejection and demolding structure. Two or more support plates 10 are provided above the bottom plate 9. An accommodating space is formed between the two or more support plates 10. The accommodating space is used to accommodate the supporting structure in the ejection and demolding assembly. The ejection and demolding assembly is used to lift and demold the product formed in the mold core 1. A lower template 11 is fixedly installed on the two or more support plates 10. The mold core 1 is installed on the lower template 11 and is used in conjunction with the injection cavity in the upper mold. There is a buffer space between the lower template 11 and the support plate 10.

[0021] The ejection and demoulding structure includes a support module 2, an ejector pin 3, a movable insert 4 and an insert pin 5. The undercut molding area of the plastic product is made into the movable insert 4, wherein one end of the movable insert 4 is used to cooperate with the hanging platform and the bottom plate 9 to limit and fix the movable insert 4. At the same time, the hanging platform is left at a distance to form a virtual space, so that the movable insert 4 can move with the product during the ejection stage;

[0022] At the same time, a sliding groove 6 is opened on the bottom plate 9, and one end of the hanging platform of the movable insert 4 is inserted into the sliding groove 6 and slidably connected to the sliding groove 6. One end of the hanging platform of the movable insert 4 is D-shaped and fits with the inner wall of the sliding groove 6, which helps the movable insert 4 to slide.

[0023] An insert 7 is also fixed to the bottom plate 9 by means of screws, and the insert 7 is used to prevent the movable insert 4 from falling out.

[0024] A limiting groove 8 is also provided on the movable insert 4. The insert pin 5 is fixed on the support module 2 and inserted into the limiting groove 8. A D-shaped positioning groove is provided at the end of the insert pin 5. The end of the D-shaped positioning groove supports the side wall of the limiting groove 8 of the movable insert 4. During the retraction of the support module 2, the insert pin 5 drives the movable insert 4 to retract synchronously through the joint action of the positioning groove and the limiting groove 8, and retracts the movable insert 4 to the starting position.

[0025] When the product is ejected, the movable insert 4 will be ejected forward along with the product by virtue of the adhesive force of the undercut. Since there is a space above the hanging platform for the movable insert 4, the movable insert 4 will be blocked by the plane above the hanging platform after it is ejected upward for a distance.

[0026] After the movable insert 4 is blocked, the ejector pin 3 can still be ejected forward. At this point, the undercut of the product has escaped the mold steel, allowing the plastic product to elastically deform outward. Under the action of the ejector pin 3, the product is forcibly released from the undercut, achieving the desired demolding effect.

[0027] The support module 2 is slidably connected to the lower template 11 via the guide column 12. At the same time, a spring 13 is mounted on the guide column 12 and located between the support module 2 and the lower template 11. Under the action of the spring 13, the support module 2 is reset without external force.

[0028] The bottom plate 9 is also provided with a through hole 14 for the hydraulic column to pass through. The hydraulic column acts on the support module 2 through the through hole 14. Under the action of the hydraulic column, the support module 2 ejects the product through the ejector pin 3 and presses the spring 13 at the same time, so that the spring 13 is compressed.

[0029] When the utility model is in use, the product is molded by molten plastic in the mold groove formed by the mold core 1 and the top of the movable insert 4. When the product needs to be demoulded, the staff starts the hydraulic column, which drives the support module 2, prompting the support module 2 and the ejector pin 3 thereon to move outward. The ejector pin 3 ejects the product. Under the viscosity of the product itself, the movable insert pin 5 is brought out to a certain height.

[0030] When the sliding groove 6 in the bottom plate 9 limits the hanging platform of the movable inlay pin 5, the movable inlay pin 5 no longer moves outward. Under the action of the limiting groove 8 and the inlay pin 5, the support module 2 is not restricted, and the ejector pin 3 can continue to move outward, thereby peeling the inner buckle part of the product from the top of the movable inlay pin 5;

[0031] When the stripping is completed, the hydraulic column no longer squeezes the support module 2, and the support module 2 moves toward the initial position under the action of the spring 13. At the same time, during the movement, the insert pin 5 limits the lower side wall of the limiting groove 8, thereby driving the movable insert 4 to move downward to the initial position.

[0032] The utility model adopts a movable insert 4, a virtual position set at the hanging platform of the movable insert 4, a limiting groove 8 opened on the movable insert 4 and an inserting pin 5, so that the product with the undercut glue position can be demoulded after leaving the range of the mold steel, thereby protecting the product during the demoulding process.

[0033] Furthermore, the mold structure of the strong release undercut in the present invention is simple and convenient, compared to the traditional complex slider and inclined top structure. It can save mold manufacturing costs while enhancing mold stability and making it less susceptible to damage. This can extend the mold's service life and increase mold production, among other advantages.

Claims

1. A mold structure that facilitates strong removal of undercuts, comprising a base, a mold core (1), and an ejection and demoulding assembly, wherein the base is used to fix the mold core (1), and the ejection and demoulding assembly is slidably connected to the base for ejecting the product from the mold core (1); It is characterized by: The ejection and demoulding assembly comprises a support module (2), an ejector pin (3), a movable insert (4) and an insert pin (5); the support module (2) is arranged in the base for guiding the movement of the ejector pin (3); the ejector pin (3) is fixedly connected to the support module (2) for separating the edge of the product from the mold core (1); one end of the movable insert (4) is located in the base and can be displaced relative to the base; the other end of the movable insert (4) passes through the mold core (1) for internal molding of the product; the distance that the ejector pin (3) moves out of the mold core (1) is greater than the distance that the movable insert (4) moves out of the mold core (1); the insert pin (5) is arranged in the support module (2) for limiting the moving distance of the support module (2).

2. A mold structure for facilitating strong removal of undercuts according to claim 1, characterized in that: One end of the movable insert (4) located in the base is D-shaped, and a sliding groove (6) for accommodating the end of the movable insert (4) and fitting with the end of the movable insert (4) is provided on the base. The movable insert (4) is inserted into the sliding groove (6) and is slidably connected to the sliding groove (6). An insert (7) for closing the opening of the sliding groove (6) is fixed on the base by bolts.

3. The mold structure for facilitating strong removal of undercuts according to claim 2, characterized in that: A limiting groove (8) is provided on the outer edge surface of the movable insert (4), and the end of the insert pin (5) is inserted into the limiting groove (8) to limit the support module (2).

4. The mold structure for facilitating strong removal of undercuts according to claim 1, characterized in that: The base comprises a bottom plate (9), a support plate (10) and a lower template (11) arranged in sequence along the height direction; the support module (2) is located in a space formed by the support plate (10); a buffer space exists between the support module (2) and the lower template (11); the support module (2) is slidably connected to the lower template (11) via a guide column (12); and a spring (13) is provided on the guide column (12) and is located between the support module (2) and the lower template (11).

5. The mold structure for facilitating strong removal of undercuts according to claim 4, characterized in that: A through hole (14) is provided on the bottom plate (9), and the through hole (14) is used to accommodate a hydraulic column that pushes the support module (2) to move.

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