Kettle-pressure extrusion integrated micro-foaming extrusion forming device and kettle-pressure extrusion integrated micro-foaming extrusion forming method

Abstract

The invention discloses a kettle-pressure extrusion integrated micro-foaming extrusion forming device and a kettle-pressure extrusion integrated micro-foaming extrusion forming method. The kettle-pressure extrusion integrated micro-foaming extrusion forming device mainly consists of a material feeding system, a gas feeding system and an extrusion system; the material feeding system is connected with a material feeding device of a machine barrel of the extrusion system; the gas feeding system provides the material feeding system with supercritical gas; and the material feeding system mainly consists of a storage hopper, a motor, a motor driving shaft, a gear, a key, a transmission piece, a pressure piece, a sealing barrel, a permeating kettle, a sealing gasket, a spring, a roller, a gas cylinder, a gas cylinder pull rod, a sealing plate, a limiting block and a pressure rod. A granular raw material is permeated, so that the penetrating time is shortened substantially, continuous extrusion of micro-foaming products is achieved, and the production efficiency is improved; the granular raw material is subjected to supercritical gas permeating through the permeating kettle, so that technological parameters are controlled accurately, the foaming quality is higher, and the property of the product is better; and the gas after being permeated can be recycled in a working process, so thata use ratio of the gas is increased compared with that in the traditional kettle-pressure foaming method.

Description

technical field [0001] The invention relates to a micro-foaming extrusion molding device and method, in particular to a micro-foaming extrusion molding device and method for gas recycling, and belongs to the field of polymer material processing and molding. Background technique [0002] Microfoamed polymer refers to a polymer material as a matrix, which contains a porous polymer material with a cell size ranging from less than one micron to tens of microns. Introducing a large number of voids smaller than the existing defects in the polymer matrix can reduce the amount of material used and reduce the weight of the product while improving its rigidity and avoiding a significant impact on strength and other properties. Therefore, micro-foam molding has become a research hotspot in recent years. [0003] For micro-foamed polymer sheet and plate products, the molding method generally adopts autoclave pressure foaming method or continuous extrusion foaming method. The kettle pr...

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Problems solved by technology

[0005] Aiming at the problems of low production efficiency of the kettle pressure foaming method, poor cell controllability of the continuous extrusion foaming method, and high cost of equipment transformation, the present invention proposes a kettle pressure extrusion integrated micro-foaming extruder for recycling supercritical gas. Forming device and method

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