Special-shaped curve silica gel injection molding machine screw

Abstract

The invention provides a special-shaped curve silica gel injection molding machine screw. A special-shaped curve is adopted for rotating along a cone to form a non-cylindrical uniform-pitch spiral curved surface, and the special-shaped curve parameter, the pitch and the screw cone taper of the special-shaped curve screw are set according to the requirements for the injection molding amount and the injection molding pressure. The practical device of the special-shaped curve silica gel injection molding machine is composed of an injection cavity, a pump body, the special-shaped curve screw, a pump cover and a large-end sealing thrust bearing. A motor drives the special-shaped curve screw to rotate in the pump body, heated silica gel materials enter the pump body through a feeding port and are pushed by a spiral curved surface groove of the special-shaped curve screw to move towards the injection cavity, due to the fact that the outer diameter part of the special-shaped curve screw is contained and supported in a conical pipe of the pump body, the linear speeds of the silica gel materials at different axial positions are different when the silica gel materials move towards the injection cavity, the silica gel materials are gradually pressurized, and the silica gel materials entering the injection cavity reach the injection pressure requirement and are extruded out to enter a silica gel product die.

Description

technical field [0001] Due to its good affinity with biological organisms, silica gel is more and more widely used in the fields of medical treatment and daily necessities. Injection screw is the core component of silicone injection molding equipment. Its service life and reliability have become the key links that restrict the overall performance of silicone injection molding equipment, and have been widely valued by research institutions and equipment manufacturers. The invention relates to a special-shaped curve silicone injection molding machine screw. Background technique [0002] Silicone rubber products are used more and more in medical treatment and people's daily life. At present, the usual process of silica gel products is to manufacture silica gel products by injecting molten silica gel material at a certain temperature into the cavity of the injection mold, and cooling it in the mold to below a certain temperature to form the mold. Therefore, silicone injection ...

AI Technical Summary

Problems solved by technology

However, due to the high temperature of silicone injection molding and the need to increase the injection pressure in order to ensure the quality of silicone products, the silicone injection screw has a short life and is prone to failure.

From the analysis of actual product feedback information, only from improving the material of the screw body, the improvement effect obtained is limited

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