Die for handle machining

Abstract

The utility model relates to a mould for processing a handle, which comprises a movable mould assembly and a static mould assembly, a mould cavity for forming the handle is arranged at the mould closing position of the movable mould assembly and the static mould assembly, the mould further comprises a flow guide cavity communicated with the mould cavity, and the flow guide cavity is arranged on the side wall of the mould cavity and corresponds to the position of a weld line at the thin wall of the handle. An exhaust channel used for exhausting air and preventing injection molding materials from passing through is arranged on the flow guide cavity, one end of the exhaust channel is communicated with the flow guide cavity, and the other end of the exhaust channel is communicated with the outside. The technical scheme of the utility model has the technical effects that the flow velocity at the thin wall of the handle is improved, the handle can be fused quickly, and the product quality is improved, so that the defects of cracking, short service life and the like are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of moulds, in particular to a mould for handle processing. Background Art

[0002] The control handle is applicable to a plastic case circuit breaker. The control handle can be installed on the plastic case, and then the closing or opening of the circuit breaker can be controlled by rotating the handle clockwise or counterclockwise. At present, in the injection molding production of the handle in the prior art, weld line marks are likely to be generated at the thin-wall part of the handle. The generation of the weld line seriously affects the appearance quality of the handle. The position where the weld line is formed on the handle is prone to cracking, resulting in a reduction in the service life of the handle. Content of the Utility Model

[0003] Based on the above problems, the utility model provides a mould for handle processing, which can improve the flow rate at the thin-wall part of the handle, enable it to fuse quickly, improve and enhance the product quality, and thus solve defects such as cracking and low service life.

[0004] To achieve the above object, the utility model provides the following technical solution: A mould for handle processing, including a moving mould assembly and a static mould assembly. A cavity for handle forming is arranged at the mould closing part of the moving mould assembly and the static mould assembly. It further includes a diversion cavity communicated with the cavity. The diversion cavity is arranged on the side wall of the cavity and corresponds to the weld line position of the thin-wall part of the handle. An exhaust channel for exhausting gas and preventing the injection molding material from passing through is arranged on the diversion cavity. One end of the exhaust channel is communicated with the diversion cavity, and the other end is communicated with the outside.

[0005] By adopting the above technical solution, a diversion cavity is added at the thin-wall part of the handle corresponding to the cavity, and both ends of the diversion cavity are respectively communicated with the cavity and the exhaust channel. When the handle is injection molded, the gas is driven into the diversion cavity by the injection molding material and discharged to the outside through the exhaust channel. The injection molding material fills the diversion cavity to form a diversion small convex bump. Through the cooperation of the exhaust channel and the diversion cavity, the weld marks are gathered in the diversion cavity to eliminate the weld line at the thin-wall part of the formed handle. While improving the flow rate at the thin-wall part, the fusion at the weld line position is made faster, thus solving defects such as cracking and air entrapment, improving and enhancing the product quality, and increasing the service life of the handle. After the handle is injection molded, only the diversion small convex bump needs to be removed from the handle position, which is convenient for operation. The depth of the exhaust channel is less than the overflow value of the injection molding material, which is convenient for exhausting gas and prevents the injection molding material from passing through, and the structure is more reasonable, further improving the stability of the structure.

[0006] The utility model is further arranged as follows: The exhaust channel includes a narrow part and a wide part. The wide part is arranged at the other end of the narrow part relative to the diversion cavity, and the inner diameter of the narrow part is smaller than that of the wide part.

[0007] By adopting the above technical solution, the area of the exhaust passage along the gas discharge direction becomes larger, accelerating the gas discharge efficiency. While effectively increasing the exhaust volume, the influence of gas entrapment phenomenon is greatly reduced, and the reliability of the structure is further improved. One or more exhaust passages can be provided, and preferably two in the present utility model. The structure is reasonable, meeting the exhaust requirements during the forming of the handle. The exhaust is rapid and smooth, and the forming is more stable.

[0008] The present utility model is further provided with: the inner diameter of one end of the diversion cavity corresponding to the cavity does not exceed the inner diameter of the cavity corresponding to the thin wall of the handle.

[0009] By adopting the above technical solution, it promotes that the connection between the diversion small convex bumps formed by injection molding in the diversion cavity and the formed handle is weaker, facilitating the subsequent separation of the handle finished product from the diversion small convex bumps, and making the influence of removing the diversion small convex bumps on the appearance of the handle finished product not significant, further enhancing the aesthetic degree of the appearance of the finished product.

[0010] The present utility model is further provided with: the upper inner wall of the connection part between the diversion cavity and the cavity is arranged in an arc shape.

[0011] By adopting the above technical solution, during the injection molding of the handle, the injection molding material is placed into the diversion cavity from one end of the diversion cavity facing the cavity. The upper inner wall of the diversion cavity is arranged in an arc shape, which plays a role in guiding the injection molding material while reducing the kinetic energy of the injection molding material, enabling the injection molding material to be effectively buffered when flowing in, and making the forming of the handle more stable.

[0012] The present utility model is further provided with: the static mold assembly is provided with a forming insert for forming corresponding to the thin wall of the handle.

[0013] By adopting the above technical solution, the setting of the forming insert is used for the injection molding of the thin wall position of the handle. By separating the thin wall part, it is beneficial for mold polishing, improving the mold production and processing while enhancing the processing precision of the product, and further improving the reliability of the structure. Description of the Drawings

[0014] Figure 1 is the structural sectional view of the embodiment of the present utility model;

[0015] Figure 2 is Figure 1 the enlarged view of the structure of part A of

[0016] Figure 3 is the structural exploded view of the embodiment of the present utility model;

[0017] The meanings of the reference numerals in the figures: 1 - moving mold assembly, 2 - static mold assembly, 3 - cavity, 4 - diversion cavity, 5 - exhaust passage, 501 - narrow part, 502 - wide part, 6 - forming insert, 7 - diversion small convex bump, 8 - handle. Detailed Embodiment

[0018] This specific embodiment is only an interpretation of the present utility model and does not limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.

[0019] See the appendix Figures 1-3 , a mold for processing a handle 8 disclosed by the present utility model includes a moving mold assembly 1 and a stationary mold assembly 2. A cavity 3 for forming the handle 8 is provided at the mold closing position of the moving mold assembly 1 and the stationary mold assembly 2. It further includes a diversion cavity 4 communicated with the cavity 3. The diversion cavity 4 is arranged on the side wall of the cavity 3 and corresponds to the position of the weld line at the thin wall of the handle 8. An exhaust passage 5 for exhausting gas and preventing the injection molding material from passing through is provided on the diversion cavity 4. One end of the exhaust passage 5 is communicated with the diversion cavity 4, and the other end is communicated with the outside. A diversion cavity 4 is added at the thin wall of the cavity 3 corresponding to the handle 8, and both ends of the diversion cavity 4 are respectively communicated with the cavity 3 and the exhaust passage 5. When the handle 8 is injection molded, the gas is driven into the diversion cavity 4 by the injection molding material and discharged to the outside through the exhaust passage 5. The injection molding material fills the diversion cavity 4 to form a diversion small convex bump 7. Through the cooperation of the exhaust passage 5 and the diversion cavity 4, the weld lines are gathered in the diversion cavity 4 to eliminate the weld line at the thin wall of the formed handle 8. While improving the flow rate at the thin wall, the fusion at the weld line position is made faster, thereby solving defects such as cracking and air entrapment, improving and enhancing the product quality, and increasing the service life of the handle 8. After the handle 8 is injection molded, only the diversion small convex bump 7 needs to be removed from the position of the handle 8, which is convenient to operate. The depth of the exhaust passage 5 is less than the overflow value of the injection molding material, which is convenient for exhausting gas and prevents the injection molding material from passing through, making the structure more reasonable and further improving the stability of the structure.

[0020] This embodiment is further provided that: the exhaust passage 5 includes a narrow part 501 and a wide part 502. The wide part 502 is arranged at the other end of the narrow part 501 relative to the diversion cavity 4, and the inner diameter of the narrow part 501 is smaller than the inner diameter of the wide part 502. This makes the area of the exhaust passage 5 increase along the gas discharge direction, accelerating the gas discharge efficiency, effectively increasing the exhaust volume, while greatly reducing the influence of air entrapment phenomenon, and further improving the reliability of the structure. The exhaust passage 5 can be provided with one or more. In this embodiment, it is preferably two, with a reasonable structure, meeting the exhaust requirements when the handle 8 is formed, exhausting gas quickly and smoothly, and the molding being more stable.

[0021] In this embodiment, it is further set that: the inner diameter of the diversion cavity 4 at one end corresponding to the cavity 3 does not exceed the inner diameter of the thin-wall part of the cavity 3 corresponding to the handle 8. This makes the connection between the diversion small convex bump 7 formed by injection molding in the diversion cavity 4 and the formed handle 8 weaker, facilitating the subsequent separation of the finished handle 8 from the diversion small convex bump 7, so that the removal of the diversion small convex bump 7 from the finished handle 8 has little impact on its appearance, and further improving the aesthetic degree of the finished product appearance.

[0022] In this embodiment, it is further set that: the upper inner wall of the connection between the diversion cavity 4 and the cavity 3 is arc-shaped. When the handle 8 is injection-molded, the injection molding material is placed into the diversion cavity 4 from one end of the diversion cavity 4 towards the cavity 3. The upper inner wall of the diversion cavity 4 is arc-shaped, which plays a role in guiding the injection molding material and reduces the kinetic energy of the injection molding material, so that the injection molding material is effectively buffered when flowing in, and the handle 8 is more stable in forming.

[0023] In this embodiment, it is further set that: the static mold assembly 2 is provided with a forming insert 6 for forming at the thin-wall part of the handle 8. The setting of the forming insert 6 is used for injection molding of the thin-wall position of the handle 8. By separating the thin-wall part, it is beneficial to save the mold, improve the mold production and processing, and at the same time improve the processing accuracy of the product, and further improve the reliability of the structure.

[0024] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and modifications can be made. These improvements and modifications made above should also be regarded as the protection scope of the present invention.

Claims

1. A mold for handle processing, comprising a movable mold assembly and a static mold assembly, wherein a cavity for shaping the handle is provided at the mold joint of the movable mold assembly and the static mold assembly, and characterized in that: It also includes a guide cavity connected to the mold cavity, which is arranged on the side wall of the mold cavity and corresponds to the weld line position at the thin wall of the handle. The guide cavity is provided with an exhaust channel for exhausting air and preventing the injection material from passing through. One end of the exhaust channel is connected to the guide cavity, and the other end is connected to the outside.

2. A mold for handle processing according to claim 1, characterized in that: The exhaust passage comprises a narrow portion and a wide portion, wherein the wide portion is arranged at the other end of the narrow portion relative to the guide cavity, and the inner diameter of the narrow portion is smaller than the inner diameter of the wide portion.

3. A mold for handle processing according to claim 1, characterized in that: The inner diameter of one end of the guide cavity corresponding to the cavity does not exceed the inner diameter of the thin wall of the handle corresponding to the cavity.

4. A mold for handle processing according to claim 1, characterized in that: The inner wall of the upper end where the guide cavity is connected with the mold cavity is arranged in an arc shape.

5. A mold for handle processing according to claim 1, characterized in that: The static mold component is provided with a molding insert for molding at the thin wall of the handle corresponding to the static mold component.

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