Hot-melting extrusion molding method for polystyrene plastic foam

Abstract

The invention discloses a hot-melting extrusion molding method for polystyrene plastic foam. The hot-melting extrusion molding method for the polystyrene plastic foam comprises the steps that molten plastic is conveyed into an installing handpiece; the molten plastic is output through the installing handpiece and is of a soft solid strip-shaped structure when the molten plastic is output; a rotation shaft rotates, and pulling pins make contact with cutting components; the rotation shaft rotates and enables a sliding connection handpiece, the cutting components and strip-shaped plastic to synchronously do movement far away from a fixed handpiece through cooperation of triggering protrusions and triggering pins, and the rotation shaft rotates and enables the pulling pins to pull the cuttingcomponents to cut the strip-shaped plastic; resetting components instantaneously enable the cutting components to be reset at the initial positions of a cutting disc, and meanwhile the sliding connection handpiece and the cutting components still continue doing movement far away from the fixed handpiece; under the elastic force action of resetting springs, a triggering disc does return movement close to the fixed handpiece, and then a granule cutting mechanism and a triggering synchronizing mechanism restore to the original state; and the process is repeatedly conducted, and then reciprocatinggranule cutting treatment on the strip-shaped plastic can be completed.

Description

technical field [0001] The invention relates to the field of plastic mechanisms, in particular to a method for granulating plastic particles. Background technique [0002] At present, in the production of plastic granules, most of the plastic granule production units are composed of extruder, cooling water tank, drying fan, traction pelletizer and other equipment. In the process of plastic granule production, the strip-shaped plastic extruded by the extruder It needs to be cooled in the cooling water tank first, then air-dried by a drying fan, and then pelletized after being pulled by a traction pelletizer. The production cost of plastic pellets is reduced, and the production efficiency of plastic pellets is reduced. In addition, during the pelletizing process of plastics, since the position of the cutting knife remains unchanged, the plastic continues to output, which in turn causes the cutting surface of plastic pellets to be irregularly inclined. It greatly affects the q...

AI Technical Summary

Problems solved by technology

[0002] At present, in the production of plastic granules, most of the plastic granule production units are composed of extruder, cooling water tank, drying fan, traction pelletizer and other equipment. In the process of plastic granule production, the strip-shaped plastic extruded by the extruder It needs to be cooled in the cooling water tank first, then air-dried by a drying fan, and then pelletized after being pulled by a traction pelletizer. The production cost of plastic pellets is reduced, and the production efficiency of plastic pellets is reduced. In addition, during the pelletizing process of plastics, since the position of the cutting knife remains unchanged, the plastic continues to output, which in turn causes the cutting surface of plastic pellets to be irregularly inclined. It greatly affects the quality of plastic granules and directly affects the subsequent sales of plastic granules. For this reason, it is necessary for the present invention to propose a plastic granule molding equipment, which sequentially melts plastic shards, filters impurities, transports them, strips them, Particles are cut and plastic particles are obtained. During the impurity filtering process, the impurities can be transported away by the auger after being blocked by the filter screen, so that the filter screen can avoid frequent replacement and maintenance; during the particle cutting process, the strip plastic and the cutting knife are synchronized Movement, that is, the two are in a relatively static state, so the cutting process is smooth and smooth, and the subsequent molten plastic will not be blocked because the cutting knife blocks the discharge hole, and the cutting surface of the plastic particles is also a flat surface instead of Inclining the irregular surface, the obtained plastic particles are of the same size, better in quality, and more convenient for subsequent sales

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