In-mold glue feeding point self-adaptive cutting mechanism and mold thereof

Abstract

The utility model relates to toy molding technical field provides a kind of in-mold glue point self-adapting cutting mechanism and mould thereof, in-mold glue point self-adapting cutting mechanism includes cutter base, cutter reset rod, elastomer and cutter;The cutter reset rod, cutter are vertically arranged in the top of cutter base, the top of cutter is opposite the junction of product and flow channel;The top of cutter reset rod is higher than the top of cutter and is abutted with the R plate of upper, the bottom of cutter base is equipped with elastomer.The utility model in driving force is carried out by the elasticity of elastomer, does not need separate oil cylinder and control system, cutter will be cut off and can be self-adaptively completed, does not need manual participation, and cost is low, maintenance is convenient, greatly simplifies the structure of mould, and practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of toy molding technology, specifically to an in-mold adhesive injection point adaptive cutting mechanism and its mold. Background Technology

[0002] The injection molding process of toys involves the melting, flow, and shaping of plastic. The plastic is heated and melted in the injection molding machine barrel and injected into the mold runner under the pressure of the injection molding machine plunger or screw. Finally, it enters the mold cavity to form the shape of the product, and after a period of pressure holding and cooling, the product is formed.

[0003] In existing technologies, products are typically configured with planar glue inlet channels, such as... Figure 4 As shown, to achieve automatic cut-off of the runner inlet point, there are currently in-mold hot cutting, out-of-mold cold cutting (cutting the inlet point with scissors or other tools), and some methods that tear off the inlet point by delayed ejection. Through practical verification, in-mold hot cutting has the best effect in cutting off the runner inlet point, cutting it cleanly without manual intervention. However, it is expensive because it requires a hydraulic cylinder and a separate control system, and it has the disadvantage of being inconvenient to maintain. The structure still needs to be improved. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an adaptive cutting mechanism for in-mold glue injection points and its mold.

[0005] According to the present invention, an adaptive cutting mechanism for in-mold glue injection points includes a cutter base, a cutter reset rod, an elastic body, and a cutter.

[0006] The cutter reset rod and the cutter are both vertically arranged at the top of the cutter base, with the top of the cutter facing the connection between the product and the flow channel; the top of the cutter reset rod is higher than the top of the cutter and abuts against the upper R plate.

[0007] The bottom of the cutter base has a receiving cavity, the elastomer is in a compressed state and its upper end extends into the receiving cavity, and its lower end abuts against the B plate of the mold;

[0008] When the mold is opened, the R plate moves away from the top of the cutter reset rod. Driven by the elastic force of the elastic body, the cutter base drives the cutter reset rod and the cutter to move upward in sync, so that the connection between the product and the runner is cut off.

[0009] Preferably, it further includes a guide post that penetrates the cutter base and is used to guide the cutter base.

[0010] Preferably, when the mold is opened, the distance the cutter moves upward is ≤1.2 mm.

[0011] Preferably, when the mold is opened, the distance the cutter moves upward is ≤1 mm.

[0012] Preferably, the number of guide posts is multiple.

[0013] Preferably, plate A is located above plate B, plate R is arranged above plate A, and the cutter reset rod passes through plate A.

[0014] Preferably, the cutter base is disposed between the A plate and the B plate.

[0015] Preferably, the cutter reset rod and the guide post are both cylindrical or regular polyhedral structures.

[0016] Preferably, the lower end of the cutter is fixed inside the cutter base.

[0017] Preferably, the elastomer is a spring or elastic rubber.

[0018] Preferably, the spring is a nitrogen spring.

[0019] A mold according to the present invention includes the aforementioned in-mold glue injection point adaptive cutting mechanism.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The in-mold thermal cutting method used in this invention cuts off the injection point of the runner. The driving force is provided by the elasticity of the elastomer, eliminating the need for a separate hydraulic cylinder and control system. When it is necessary to cut off the injection point, simply release the top of the cutter reset rod, and the cutter will be driven by the elasticity of the elastomer itself to cut off the injection point. This process can be completed adaptively without manual intervention, and it is low in cost, easy to maintain, and greatly simplifies the structure of the mold, making it highly practical. Attached Figure Description

[0022] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the adaptive cutting mechanism for the in-mold glue injection point;

[0024] Figure 2 This is a schematic diagram of the cross-section of the adaptive cutting mechanism for the in-mold glue injection point;

[0025] Figure 3 This is a schematic diagram of the cross-section of the mold;

[0026] Figure 4 A schematic diagram of a planar glue inlet channel for a product in the prior art.

[0027] The diagram shows:

[0028] Product 1;

[0029] Flow channel 2;

[0030] Inlet point 21;

[0031] Cutter base 3;

[0032] Cutter reset lever 4;

[0033] Elastomer 5;

[0034] Cutting blade 6;

[0035] Guide post 7;

[0036] Board B, 8;

[0037] R-plate 9;

[0038] Board A, 10. Detailed Implementation

[0039] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0040] This utility model provides an adaptive cutting mechanism for in-mold glue injection points, such as... Figure 1 , Figure 2 , Figure 3 As shown, it includes a cutter base 3, a cutter reset rod 4, an elastic body 5, a cutter 6, and a guide post 7. The cutter reset rod 4 and the cutter 6 are both vertically arranged at the top of the cutter base 3. The lower ends of the cutter reset rod 4 and the cutter 6 are preferably fixed inside the cutter base 3, and can be configured as a detachable connection.

[0041] Specifically, the top of the cutter 6 is directly opposite the connection between the product 1 and the flow channel 2. The product 1 is preferably made of PVC or ABS material, and the connection between the product 1 and the flow channel 2 is defined as the glue inlet point 21. The top of the cutter reset rod 4 is higher than the top of the cutter 6, and the top of the cutter reset rod 4 abuts against the upper R plate 9. The R plate 9 is a stripping plate, which restricts the upward movement of the cutter reset rod 4. The guide post 7 passes through the cutter base 3 and is used to guide the cutter base 3. When the cutter base 3 moves up and down, the guide post 7 guides the movement of the cutter base 3.

[0042] Furthermore, plate A 10 is located above plate B 8, plate R 9 is arranged above plate A 10 and contacts plate A 10, cutter reset rod 4 passes through plate A 10, and cutter base 3 is disposed between plate A 10 and plate B 8. The bottom of cutter base 3 has a receiving cavity for accommodating elastomer 5. The upper end of elastomer 5 extends into the receiving cavity, and the lower end of elastomer 5 abuts against the upper surface of plate B 8 of the mold. Elastomer 5 is always in a compressed state under the constraint of cutter base 3 and plate B 8. The elastomer 5 can be a spring or elastic rubber, preferably a spring, such as a nitrogen spring.

[0043] When the mold is opened, the R plate 9 leaves the top of the cutter reset rod 4, and the constraint on the top of the cutter reset rod 4 is released. At this time, the cutter base 3 is pushed upward under the force of the elastic body 5. Then the cutter base 3 drives the cutter reset rod 4 and the cutter 6 to move upward synchronously. The A plate 10 guides the movement of the cutter reset rod 4. The upward movement of the cutter 6 cuts off the connection between the product 1 and the flow channel 2.

[0044] It should be noted that during mold opening, the upward movement distance of the cutter 6 is ≤1.2 mm, preferably ≤1 mm. In one preferred embodiment, the upward movement distance of the cutter 6 is 0.5 mm. In a variation, the upward movement distance of the cutter 6 is 0.6 mm. It should be noted that, to protect the cutting edge from damage, the upward distance is generally 0.01 to 0.03 mm less than the set movement distance to prevent the cutting edge of the cutter 6 from colliding with the mold core after cutting through the injection point 21, which could cause the cutting edge to collapse.

[0045] To ensure the stability of the die-cutting process, multiple guide pillars 7 are used, which makes the up-and-down movement of the cutter base 3 more stable.

[0046] Specifically, the cutter reset rod 4 can adopt a cylindrical structure or a regular polyhedron structure, and the guide post 7 can be a cylindrical structure or a regular polyhedron structure. The regular polyhedron structure can be a square, a regular triangular prism, etc. The cylindrical structure or the regular polyhedron structure is beneficial for guidance.

[0047] This utility model also provides a mold, including an in-mold glue injection point adaptive cutting mechanism. The in-mold glue injection point adaptive cutting mechanism enables the driving force to be driven by the elastic force of the elastic body, eliminating the need for a separate oil cylinder and control system, and enabling adaptive completion, reducing costs, and providing the advantage of convenient maintenance, greatly simplifying the structure of the mold.

[0048] The working principle of this utility model is as follows:

[0049] When the mold opens, the R plate 9 moves away from the A plate 10, the limit at the top of the cutter reset rod 4 is released, and the cutter reset rod 4 can float upward. Driven by the elastic restoring force of the spring, the cutter 6 moves upward by 0.5mm and cuts off the injection point 21. When the mold closes, the R plate 9 presses against the cutter reset rod 4, causing the cutter reset rod 4 to move downward, which in turn drives the cutter base 3 to move the cutter 6 downward. The spring is compressed to the state before the mold opens.

[0050] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0051] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. An in-mold adhesive injection point adaptive cutting mechanism, characterized in that, It includes a cutter base (3), a cutter reset rod (4), an elastomer (5), and a cutter (6); The cutter reset rod (4) and the cutter (6) are both vertically arranged at the top of the cutter base (3). The top of the cutter (6) is directly opposite the connection between the product (1) and the flow channel (2). The top of the cutter reset rod (4) is higher than the top of the cutter (6) and abuts against the upper R plate (9). The bottom of the cutter base (3) has a receiving cavity, the elastic body (5) is in a compressed state and its upper end extends into the receiving cavity, and its lower end abuts against the B plate (8) of the mold; When the mold is opened, the R plate (9) leaves the top of the cutter reset rod (4). Driven by the elastic force of the elastic body (5), the cutter base (3) drives the cutter reset rod (4) and the cutter (6) to move upward synchronously, so that the connection between the product (1) and the flow channel (2) is cut off.

2. The in-mold adhesive injection point adaptive cutting mechanism according to claim 1, characterized in that, It also includes a guide post (7) that passes through the cutter base (3) and is used to guide the cutter base (3).

3. The in-mold adhesive injection point adaptive cutting mechanism according to claim 1, characterized in that, When the mold is opened, the distance that the cutter (6) moves upward is ≤1.2 mm.

4. The in-mold adhesive injection point adaptive cutting mechanism according to claim 3, characterized in that, When the mold is opened, the cutting blade (6) moves upward a distance of ≤1 mm.

5. The in-mold adhesive injection point adaptive cutting mechanism according to claim 2, characterized in that, The number of guide posts (7) is multiple.

6. The in-mold adhesive injection point adaptive cutting mechanism according to claim 1, characterized in that, The B plate (8) is above the A plate (10), the R plate (9) is arranged above the A plate (10), and the cutter reset rod (4) passes through the A plate (10).

7. The in-mold adhesive injection point adaptive cutting mechanism according to claim 6, characterized in that, The cutter base (3) is disposed between the A plate (10) and the B plate (8).

8. The in-mold adhesive injection point adaptive cutting mechanism according to claim 2, characterized in that, The cutter reset rod (4) and guide post (7) are both cylindrical or regular polyhedral structures.

9. The in-mold adhesive injection point adaptive cutting mechanism according to claim 1, characterized in that, The lower end of the cutter (6) is fixed inside the cutter base (3).

10. The in-mold adhesive injection point adaptive cutting mechanism according to claim 1, characterized in that, The elastomer (5) is a spring or elastic rubber.

11. The in-mold adhesive injection point adaptive cutting mechanism according to claim 10, characterized in that, The spring is a nitrogen spring.

12. A mold, characterized in that, Includes the in-mold injection point adaptive cutting mechanism as described in any one of claims 1 to 11.

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