A sealing method and mold for an external gas-assisted injection mold
An injection mold and external gas technology, applied in the field of external gas-assisted injection molds, can solve the problems of sealing ring wear, affecting production efficiency, difficult product and mold sealing, etc.
Active Publication Date: 2019-09-03
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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[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.
[0031] In the description of the present invention, it should be noted that the injection mold does not need to be up, down, left, or right. It is commonly called the front mold, the rear mold, or the female mold and the male mold. 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a Invention Limitations. In addition, the terms "first", "second", and "third" ...
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The invention provides a sealing method of an external gas-assisted injection mold and the mold. A circle of raised first sealing ribs is arranged on the edge of the injection molded product to prevent the gas introduced from leaking from the edge; There is a first groove extending to the male mold in a circle. After the first groove is injected, the first sealing rib on the injection molded product is formed, and the male mold used to seal the gas that passes through the cavity. side. The external air-assisted injection mold provided by the present invention prevents the gas from leaking from the edge of the cavity by setting a circle of raised first sealing ribs on the edge of the injection molded product, increases the sealing performance of the edge of the cavity, and guarantees maximum The gas holding pressure provided by the external gas-assisted injection molding technology can be improved to improve the appearance quality of the injection molding products, and the external gas-assisted injection molding machine can replace all or part of the pressure holding of the injection molding machine to reduce the clamping force of the injection molding machine and reduce the weight of the product. .
Description
technical field [0001] The invention belongs to the technical field of moulds, and in particular relates to a sealing method for 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 molding products are developing towards thinner walls, such as automotive plastic interiors, flat-panel TV plastic back shells, air-conditioner hangers and cabinet plastics Large panel etc. However, the appearance of the product has many defects due to the thinning of the wall, such as sink marks, hysteresis marks, tiger skin patterns, color difference of melting marks, etc. 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 ...
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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