Plastic granulator

Abstract

The invention discloses a plastic granulator. The plastic granulator comprises a charging cylinder, a feeding cylinder and a feeding threaded rod. The plastic granulator is characterized in that the bottom of the feeding cylinder is provided with an upper grinding disk and a lower grinding disk, and the upper grinding disk and the lower grinding disk are arranged in a relative rotation manner; a grinding material space is formed between the lower end face of the upper grinding disk and the upper end face of the lower grinding disk; the lower end face of the upper grinding disk is provided withan inwards-concaved first conical surface, and the upper end face of the lower grinding disk is provided with an outwards-convex second conical surface; the separation distance between the first conical surface and the second conical surface is gradually reduced from interior to exterior in the radial directions of the grinding disks, and an extrusion opening is formed in the outmost circle of the grinding material space; the circumference of the first conical surface is provided with a plurality of upper grooves and a plurality of first shifting strips, and the first shifting strips protrudeout of the first conical surface; the circumference of the second conical surface is provided with a plurality of lower grooves and a plurality of second shifting strips, and the second shifting strips protrude out of the second conical surface; and the outer side ends of the upper grooves and the outer side ends of the lower grooves extend to the extrusion opening. The plastic granulator carriesout plastic granulation in a grinding material pushing manner of increasing the material density and is suitable for plastic materials with high viscidity.

Description

technical field [0001] The invention relates to a plastic machine, in particular to a plastic granulator. Background technique [0002] Plastic granulator is a kind of equipment that makes plastic raw materials into plastic particles. At present, the electric heating extrusion method is basically used in the market for plastic granulation, that is, the plastic raw materials are added into the horizontal barrel, and the barrel is heated by high-power electric heating on the surface to melt the plastic raw materials at high temperature. The long screw feeds the material and extrudes the melted plastic from the die to form thin strips, and then the thin strips are cut into plastic particles by the blade after water cooling. The above-mentioned granulator consumes a lot of energy and has a large volume. In order to overcome the deficiencies in the prior art, the applicant has developed a new type of plastic granulator, which uses the rotation of the scraper in the extrusion die...

AI Technical Summary

Problems solved by technology

However, for some highly viscous plastic raw materials, after melting, the viscosity is high and the fluidity is extremely poor, and the plastic raw materials (generally in the form of flakes) that enter the extrusion mold after being fed by the feeding screw, the gap in the middle is still very large. Large, the density of the raw material is small, so the driving force on the front material in the extrusion die is also small, and the pressure in the extrusion die is not enough

Therefore, under the action of the above comprehensive factors, it will lead to difficulties in extruding the material from the extrusion hole of the extrusion die, and the production efficiency is low, and often the material is overheated under the rolling of the scraper block to cause coking, resulting in The plastic granulator cannot produce normally

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