Injection molding process for reducing shrinkage marks of antenna cover plate products
A cover plate and process technology, applied in the coating and other directions, can solve the problems of sink marks, high appearance requirements, and difficulty in reducing the sink marks on the surface of antenna cover products. effect achieved
Inactive Publication Date: 2018-03-09
SUZHOU HENGHUI TECH
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Problems solved by technology
However, due to the inherent performance of injection molding materials, combined with the unique structural characteristics of antenna cover products (there is often a reinforced rib structure placed on the inner surface of the product), there is often shrinkage at the rib reinforcement on the surface of the cover. Since the antenna cover products are appearance parts, the requirements for their appearance are relatively high.
Although there are many injection molding processes for antenna cover products in the prior art, it is always difficult to reduce the sink marks on the surface of antenna cover products.
Method used
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[0012] The specific implementation manners of the present invention will be further described below in conjunction with the drawings and examples. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0013] The present invention aims to provide a process scheme for reducing sink marks on the surface of antenna cover products. The scheme has the characteristics of high efficiency, easy operation, strong controllability and the like.
[0014] Such as figure 2 Shown is a schematic diagram of the structure of the antenna cover in the example of the present invention. The injection molding material used for the antenna cover is ASA type material. The molding properties of this material are: general fluidity, high hygroscopicity, large molding shrinkage, It is prone to stagnation, and sink marks are prone to occur during the injection molding process.
[0...
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The invention discloses an injection molding process for reducing shrinkage marks of antenna cover plate products. The injection molding process is implemented on the basis of corresponding injectionmolding systems and injection molds. The melt temperatures of the injection molding process are 240-250 DEG C, the injection time is 2-5 s, the pressure holding time is 10-15 s, and the maximum holding pressures are 120-140% of injection pressure peak values. The injection molding process for reducing the shrinkage marks of the antenna cover plate products has the advantages that the injection molding process is high in operability and easy to implement, shrinkage mark phenomena of the appearance of the antenna cover plate products in injection molding procedures can be effectively reduced, the injection molding production cycles of the products can be shortened, the production efficiency can be improved, and the production cost can be saved.
Description
technical field [0001] The invention relates to an injection molding process for reducing sink marks of antenna cover products. Background technique [0002] Antenna cover products are often used in communication, signal transmission, signal transmission and other fields. Their working environment is special, and they are exposed to all-weather working environments such as outdoors and ultraviolet rays for a long time. Therefore, the antenna cover is required to be durable and resistant to harsh environments. However, due to the inherent performance of injection molding materials, combined with the unique structural characteristics of antenna cover products (there is often a reinforced rib structure placed on the inner surface of the product), there is often shrinkage at the rib reinforcement on the surface of the cover. Since the antenna cover products are appearance parts, the requirements for their appearance are relatively high. Although there are various injection mold...
Claims
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IPC IPC(8): B29C45/00B29C45/76
CPCB29C45/0025B29C45/766B29C2945/76498B29C2945/76531B29C2945/76561
Inventor 汪栋
Owner SUZHOU HENGHUI TECH