Low pressure injection mold and injection method

Abstract

The invention discloses a low pressure injection mold, which comprises a fixed mold and a moving mold, wherein the moving mold comprises a base plate, a cavity fixedly formed on the base plate, and a plurality of cloth hanging pins arranged at the periphery of the cavity; the outer sides of the cloth hanging pins are provided with blade structures, so that a fabric is cut apart when strained; the fixed mold comprises a panel, a hot runner plate fixedly connected with the panel, a core fixedly connected with the hot runner plate, an ejection mechanism and a hot nozzle; the periphery of a lug of the core is provided with through holes corresponding to the cloth hanging pins to avoid interference; and the periphery of the lug is provided with a plurality of cloth pressing mechanisms. The invention also discloses an injection method. The mold is inversely mounted, the cavity is taken as the moving mold, the core is taken as the fixed mold, and glue feed and ejection are carried out on the same fixed mold side of the mold; meanwhile, the locating pins are provided with blades, so that the fabric can be cut apart when strained, and cannot be deformed because the fabric is strained too much.

Description

technical field [0001] The invention relates to the technical field of mechanical moulds, in particular to a mold and an injection molding method capable of connecting fabrics to injection molding plastic parts while injection molding them. Background technique [0002] In the domestic market, the sales of mid-to-high-end cars continue to grow, and the demand for high-quality high-end products will continue to increase. With the popularity of environmental protection and health concepts, automotive interior products have also begun to focus on green concepts. Environmental protection and health products will be a major trend in the development of automobiles. The room-like design of the interior improves the comfort of the ride, and has also been widely used in mid-to-high-end cars. [0003] The traditional process of forming the A and B pillars of automobiles is that the plastic parts of the A and B pillars are first molded, and then the plastic parts are manually coated wi...

AI Technical Summary

Problems solved by technology

This process needs to be completed in three steps, one is injection molding, the other is to cover the non-woven fabric with viscose, and the third is to trim the non-woven fabric. In this process, toxic solvents that are harmful to the human body will be used. The operator who applies the glue is harmful, and there are also problems such as air pollution. In addition, the space inside the car is small, which leads to more serious air pollution and peculiar smell in the car. There are many processes for pasting non-woven fabrics and plastic parts together, requiring many personnel, long processing time, and the quality of pasting is unstable, forming a low-quality and high-cost production model

At the same time, the above operations are completed by manual assembly lines, so each worker's different proficiency in the work determines the inconsistent quality of the product

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