Plastic Pelletizing Machine Extrusion System Introduction

The main machine of plastic pelletizing machines is an extruder, which consists of an extrusion system, transmission system, and heating and cooling system. Vigorously develop renewable resources, turning waste into treasure. Let's take a look at the extrusion system of a plastic pelletizing machine.

Here is the content:

• Extrusion system

• The composition of the extrusion system

Extrusion system

The extrusion system of the plastic pelletizing machine includes the hopper and the head. The plastic is plasticized into a uniform melt through the extrusion system and is continuously extruded from the head by the screw under the pressure established in this process.

The composition of the extrusion system

(1) Screw of the plastic pelletizing machine is the most important part of the extruder. It is directly related to the scope of application and productivity of the extruder, made of high-strength corrosion-resistant alloy steel.

(2) Barrel of the plastic pelletizing machine is a metal cylinder, generally made of heat-resistant, high-pressure strength, strong wear-resistant, corrosion-resistant alloy steel or alloy steel lined with a composite steel pipe. The barrel cooperates with the screw to realize the crushing, softening, melting, plasticizing, exhausting, and compacting of the plastic, and to continuously and evenly deliver the rubber to the molding system. Generally, the length of the barrel is 15-30 times its diameter, so the plastic is fully heated and fully plasticized as a principle.

(3) Hopper of the plastic pelletizing machine: The bottom of the hopper is equipped with a cut-off device to adjust and cut off the material flow. And the side of the hopper is equipped with a sight hole and a calibrated measuring device.

(4) Head and mold of the plastic pelletizing machine: The head is composed of an alloy steel inner sleeve and carbon steel outer sleeve, and the head is equipped with a molding mold. The role of the head is to transform the rotating plastic melt into a parallel linear motion, which is evenly and smoothly introduced into the mold sleeve and gives the plastic the necessary molding pressure. The plastic is plasticized and compacted in the barrel of the machine and flows through the neck of the head through a certain flow path through the perforated filter plate into the forming mold of the head. The mold core and mold sleeve are properly matched to form an annular gap with decreasing cross-section so that the plastic melt forms a continuous dense tubular cladding layer around the core line. Ensure that the plastic flow channel in the head is reasonable and eliminates the dead corner of the accumulated plastic. There is often a diversion sleeve placed, and to eliminate the pressure fluctuation of plastic extrusion, there is also a pressure equalization ring set. The head is also equipped with a die calibration and adjustment device to facilitate the adjustment and calibration of the concentricity of the die core and die sleeve.

We, the manufacturers of ACERETECH plastic pelletizing machines, have accumulated a wealth of experience and knowledge in the field of waste plastic recycling. We have total solutions. ACERETECH's plastic recycling technology is mainly used in the field of regrinding, cleaning, and granulation of waste plastics. Thanks to its R&D capabilities and in-depth knowledge of the industry experience, ACERETECH can offer customized plastic recycling solutions to its customers.