Intermittent micro-foaming injection molding equipment and intermittent micro-foaming injection molding process

Abstract

The invention relates to intermittent micro-foaming injection molding equipment and an intermittent micro-foaming injection molding process. the intermittent micro-foaming injection molding equipment mainly comprises a supercritical fluid permeable system provided with a permeable kettle, a storing system, and an injection molding system provided with a loading hopper, wherein the storing system mainly comprises a fetching device, a condensing storing barrel and a metering feed device; the fetching device is used for taking out saturated raw material in the permeable kettle and then sending the saturated raw material into the condensing storing barrel, the condensing storing barrel is used for sending the saturated raw material into the loading hopper of the injection molding system through the metering feed device. The specific process mainly comprises the following steps: arranging the raw material in the permeable kettle, releasing pressure after performing the saturated permeation by using the supercritical fluid so as to obtain the saturated raw material, adding the saturated raw material in an injection molding machine, fusing and plasticizing to obtain a homogeneous solution of polymer / gas to finish the injection; cooling and sizing, opening die to obtain a product. According to the intermittent micro-foaming injection molding equipment and the intermittent micro-foaming injection molding process disclosed by the invention, certain production efficiency is achieved, the micro-foaming injection molding can be controlled easily, and the complexity degree of the equipment transformation can be lowered.

Description

technical field [0001] The invention relates to a micro-foaming injection molding equipment and process, in particular to an intermittent micro-foaming injection molding equipment and process, belonging to the field of polymer material processing and molding. Background technique [0002] In recent years, as the price of oil continues to rise, the price of polymer materials is also rising. People hope to use a new process to develop a material that can reduce weight, reduce plastic consumption, and basically guarantee the performance of plastic products. Therefore, micro-foam molding has become a research hotspot in recent years. At present, the use of supersaturated gas method to prepare micro-foamed products has been widely used, and its molding methods mainly include batch method, continuous extrusion method, micro-foamed injection molding and other types. But all there are various deficiencies in the technical method of preparing microfoam product at present. [0003] ...

AI Technical Summary

Problems solved by technology

However, it needs to increase the supercritical control unit and improve the plasticizing system, the equipment modification is complicated, the required investment cost is large, and the process control is difficult

In particular, the control uncertainty of forming a polymer / gas homogeneous system is large, which directly affects the foaming quality of the product and is difficult to promote. Many micro-foaming methods including Mucell are facing difficulties in large-scale market promotion.

[0004] Therefore, a new process method is needed to improve the problems of complex equipment modification and difficult control in the micro-foaming injection molding process.

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