An injection molding system for chemical foaming

Abstract

The invention provides an injection molding system for chemical foaming. The injection molding system comprises a charging barrel, a hopper arranged on the upper side of the charging barrel, a screw arranged in the charging barrel in the axial direction of the charging barrel, a motor driving the screw to rotate, heating systems for heating raw materials in the charging barrel, a drive mechanism driving the motor to move in the axial direction of the charging barrel, a pressure sensor arranged in the charging barrel and a controller. The motor, the drive mechanism and the pressure sensor are connected with the controller. The problems that in the existing chemical foaming injection molding technology, before melt with a foaming agent is injected in a cavity, the pressure of the melt is hard to control, later uneven foaming can be likely to be caused, the foaming process and the foam structure are hard to control, and the foaming effect is not ideal are solved. The injection molding system belongs to the field of plastic chemical foaming.

Description

technical field [0001] The invention relates to an injection system and belongs to the field of plastic chemical foaming. Background technique [0002] Compared with unfoamed materials, the density of foamed plastics can be reduced by 5% to 95%, thereby reducing raw material consumption and cost. At the same time, it has the advantages of good sound insulation and heat insulation performance, shock load absorption, good cushioning performance, and low price. Among them, compared with ordinary foaming materials, microcellular foamed plastics have a denser and more uniform cell structure, higher cell density, better overall performance of the product, better surface quality, and less shrinkage and warpage of the product. Low and can be processed into thin-walled products, so microcellular foamed materials are one of the hotspots in the field of foam materials research in the near future. At present, the technology of microcellular foaming mainly focuses on intermittent autocl...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide an injection molding system for chemical foaming to solve the problem that the pressure of the molten material containing foaming agent in the existing chemical foaming injection molding process is difficult to control before it is injected into the cavity, which can easily lead to Uneven foaming, difficult to control the foaming process and cell structure, unsatisfactory foaming effect, etc.

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