Side wall sealing type deep hole structure and mold thereof, and injection molding method of mold

Abstract

The present invention discloses a side wall sealing type deep hole structure, wherein the inner sides and / or outer sides of the hole side walls on both sides of the opposite stream directions are respectively provided with a glue reducing flow limiting structure. The invention discloses a mold of the deep hole structure, wherein the mold comprises two glue reducing flow limiting structure forming blocks for forming the glue reducing flow limiting structure, and the glue reducing flow limiting structure forming blocks are arranged on the deep hole structure movable mold or the deep hole structure fixed mold, or the glue reducing flow limiting structure are arranged on the deep hole structure movable mold and the deep hole structure fixed mold. The invention discloses an injection molding method of the mold, wherein the stream direction is adjusted into the direction for making the glue reducing flow limiting structure forming blocks on both sides respectively be positioned on both sides of the stream direction, such that the flow rate of the C stream flowing to the original gas trapping point is limited, the C stream flows to the deep hole structure top end with no resistance, and the air is removed from the gas charge mechanism on the bottom portion of the deep hole structure movable mold cavity so as to avoid the gas trapping generation. According to the present invention, the gas line on the product surface close to the deep hole structure and other appearance defects are solved so as to obtain the product with the good appearance, such that the customer is satisfied, and the mass production is successfully achieved.

Description

technical field [0001] The invention relates to a side wall closed type deep hole structure and its mold and injection molding method. Background technique [0002] As consumers have higher requirements for car appearance and functions, car interior parts have to take on more and more roles, especially in large interior plastic parts such as rear pillar decorative panels, not only to meet their own decoration function, it may also need to provide positioning and support for other products, so the structure becomes complex, and many deep hole structures appear; usually the role of the deep hole structure mainly includes: the screw holes required for the positioning of the interior parts themselves; decoration Components such as handle boxes, ashtrays, cup holders and other structures; and positioning holes required by other products. In order to meet their functions, these structures are often small in size and deep in depth, such as 25mm and 30mm. [0003] Usually, when th...

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Problems solved by technology

[0011] The purpose of the present invention is to provide side wall closed type deep hole structure and its mold and injection molding method, to solve the problem of traditional (before improvement) deep hole structure and its mold and injection molding method. Glue speed, melt temperature and other methods cannot solve the problem of air trapping on the product surface near the deep hole structure of large injection molded parts with multi-deep hole structure, causing air marks and other appearance defects.

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