Sealing method of external air auxiliary injection mold and mold
A technology of injection mold and external gas, which is applied in the field of external gas-assisted injection molds, and can solve the problems of affecting sealing performance, affecting product quality, and few types
Active Publication Date: 2017-06-23
QINGDAO HISENSE MOLD
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Problems solved by technology
[0003] External gas-assisted injection molding can bring many benefits, but due to the complexity of the actual product, it is difficult to seal the product and the mold, and the quality of its sealing performance plays a decisive role in whether the process can be realized
At present, the existing sealing method of setting a sealing ring on the mold on the market is only suitable for products with simple structure, and the applicable product types are very few, so that this technology cannot be widely used; The seal is to set the sealing ring in sealing contact with the ejector rod, but when the ejector rod is ejected and retracted, the sealing ring will be worn and worn. Once damaged, it will affect the sealing performance and affect the quality of the product. It is necessary to remove the mold regularly Check and replace the sealing ring of the ejector rod, which seriously affects the production efficiency
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[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention.
[0032] In the description of the present invention, it should be noted that the injection mold does not need to be up, down, left and right. It is commonly called the front mold and the back mold or the female mold male mold. To avoid ambiguity, I have changed all the directions or positional relationships indicated by the mother and father to Based on the positional relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and there...
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The invention provides a sealing method of an external air auxiliary injection mold and the mold. A protruded first sealing bar is installed on the edge of an injection product to prevent influent air from leaking from the edge; and a first groove formed by extending towards a male mold is formed in the edge of a cavity of the mold, and after the first groove is subjected to injection molding, the first sealing bar located on the injection product and used for sealing the influent air into one side of a male mold of the cavity is formed. According to the external air auxiliary injection mold provided by the invention, the protruded first sealing bar is installed on the edge of the injection product to prevent influent air from leaking from the edge of the cavity, so that airtightness of the edge of the cavity is increased, the air dwell pressure which can be provided by an external air auxiliary injection molding technology is ensured to the greatest extent, and the appearance quality of the injection product is improved; and the dwell pressure of an injection molding machine is wholly or partly replaced by an external air auxiliary, so that mold clamping force reducing of the injection molding machine and weight reducing of the product are achieved.
Description
Technical field [0001] The invention belongs to the technical field of molds, and in particular relates to a sealing method of an external air assisted injection mold and an external air assisted injection mold. Background technique [0002] Due to the continuous improvement of the mechanical properties of new polymer materials, the demand for product cost reduction and the implementation of low-carbonization, injection molded products are developing towards a thin-walled trend, such as automotive plastic interiors, flat-panel TV plastic rear shells, air-conditioning hangers and cabinet plastics Large panels etc. The appearance of the product has many defects due to the thinning of the wall, such as sink marks, hysteresis marks, tiger skin patterns, and melt marks. At present, external gas-assisted injection molding technology is an effective method to solve the above defects. After the filling is completed, high-pressure gas is injected between the product and the core through ...
Claims
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Login to View More IPC IPC(8): B29C45/26B29C45/17
Inventor 徐佳驹权世环王国琪刘海平赵兵
Owner QINGDAO HISENSE MOLD