Molding process of mobile phone rear cover blank with hydraulic device and comprising middle frame

Abstract

The invention provides a molding process of a mobile phone rear cover blank with a hydraulic device and comprising a middle frame. The process comprises the following steps that raw material is meltedfrom a solid sate to a liquid state; mold closing is started; a movable mold cavity is composed of a fixed mold, an insert combination and a secondary moving mechanism; the molded raw material is injected into the movable mold cavity; a hydraulic device is stared, a movable mold core is pushed to compress and mold the raw material until the volume of the raw material reaches the volume of a product, then compressing is stopped; the product is cooled and molded, a mold is opened, and the product is taken out; and the hydraulic device restores the original position. According to the molding process of the mobile phone rear cover blank with the hydraulic device and comprising the middle frame, the production performance of an injection molding machine is improved, a mobile phone rear cover and a mobile phone middle frame are integrated, so that the cost is reduced; a material cooling cavity is formed, so that the quality of the molded product is prevented from being affected by materialcooling; and the movable mold cavity is arranged, so that the liquid raw material in the movable mold cavity is uniform in flow and easy to mold, moreover, the product is good in internal stress, attractive in appearance and uniform in thickness, and composite material is not prone to separate from each other.

Description

technical field [0001] The invention relates to a molding process of a mobile phone back cover blank, in particular to a molding process of a mobile phone back cover blank including a middle frame with a hydraulic device. Background technique [0002] At present, the molding methods usually used in the industry are through direct injection molds. During the molding process, the cavity is too small, which leads to large flow resistance of raw materials and is not easy to shape. In order to achieve product molding, the injection pressure and pressure must be increased. Injection speed, which leads to large internal stress of product molding, poor appearance, uneven thickness, and easy separation of composite materials, resulting in poor molding effect of the product. Contents of the invention [0003] Based on the deficiencies of the prior art, the purpose of the present invention is to provide a molding process of the mobile phone back cover blank including the middle frame...

AI Technical Summary

Problems solved by technology

[0002] At present, the molding methods usually used in the industry are through direct injection molds. During the molding process, the cavity is too small, which leads to large flow resistance of raw materials and is not easy to shape. In order to achieve product molding, the injection pressure and pressure must be increased. Injection speed, which leads to large internal stress of product molding, poor appearance, uneven thickness, and easy separation of composite materials, resulting in poor molding effect of the product

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