Plastic extrusion granulating unit

Abstract

The invention discloses a plastic extrusion granulating unit which is characterized by comprising a main extruder, a second extruder and a granulating device, wherein the main extruder comprises a main charging barrel and a main driving device; two main screw rods which rotate in different directions are arranged in the main charging barrel, and have opposite thread directions and are meshed with each other; the two main screw rods are in transmission connection with the main driving device; a main feeding hole is formed in the front end of the main charging barrel; a main die head is connected to the rear end of the main charging barrel; the second extruder comprises a second charging barrel and a second driving device; a second screw rod is arranged in the second charging barrel and is in transmission connection with the second driving device; a second feeding hole capable of receiving materials extruded by the main die head is formed in the front end of the second charging barrel; the rear end of the second charging barrel is connected with a second die head; the granulating device corresponds to the position of the second die head. The plastic extrusion granulating unit is smooth in feeding, the recovered plastics can be fully plastified, and plastic granules with good performance are prepared.

Description

technical field [0001] The invention relates to a machine for making granules, in particular to a plastic extruding and granulating unit. Background technique [0002] At present, a large amount of plastic waste is generated in the process of production and life. These plastic wastes cannot be degraded after being discarded into the natural environment, causing serious white pollution and damaging the environment. The recycling of plastic waste can reduce white pollution and protect the environment on the one hand, and save resources and improve economic benefits on the other hand. The way to recycle plastic waste is usually to extrude and granulate the recycled plastic waste to form plastic granules that can be used by downstream industries. [0003] The plastic extrusion granulation unit used for extrusion granulation of recycled plastics usually includes an extruder and a granulation device; in the process of extrusion granulation of recycled plastics, plastic waste is g...

AI Technical Summary

Problems solved by technology

The extruder in the existing plastic extrusion granulation unit generally adopts a single-screw extruder. Because the recycled plastic pieces are light and loose, the feeding is not smooth enough, and the screw conveying is difficult, which affects the plasticization. Effect, the performance of the prepared plastic particles is not ideal

In addition, the recycled plastic must be dried before being added to the extruder, and the drying process requires a large area and takes a lot of time, making the entire plastic recycling and granulation process less efficient and more costly

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