Plastic pelletizing machine composition structure，the plastic pelletizing machine core host is the extruder.

The composition of the extruder: extrusion system, transmission system and heating and cooling system.
The composition of the extrusion system: screw, barrel, hopper, head, and die, etc. The plastic is plasticized into a homogeneous melt by the extrusion system and is continuously extruded from the head by the screw during this process due to the working pressure.

For the analysis of the structure of the extrusion system in Plastic pelletizer.

(1) Screw: As the essential part of the extruder, it is a highly relevant component for the scope of use and production efficiency of the extruder, which is made of high-strength corrosion-resistant alloy steel.
(2) barrel: is a barrel made of metal material, usually made of high-temperature resistance, high-pressure strength, strong wear-resistant, corrosion-resistant alloy steel or composite steel tube lined with alloy steel. The barrel cooperates with the screw to realize the crushing, softening, melting, plasticizing, exhausting and tamping of the plastic and to deliver the rubber to the forming system continuously and uniformly. Usually, the total length of the barrel is 15-30 times its diameter to make the plastic get multifaceted heating and multifaceted plasticization as the principle.
(3) Hopper: The bottom of the hopper is equipped with a cut-off device to regulate 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 mould: The head comprises an alloy steel inner sleeve and carbon structural steel outer sleeve, and the director is equipped with forming mould. The role of the leader is to transform the automatic rotational movement of the plastic melt into a parallel uniform linear motion, proportional and stable, into the top block and give the plastic the necessary forming pressure. The plastic is plasticized and compacted in the barrel and flows through the head's neck through a specific over-flow channel through the porous filter plate into the lead, forming mould. The mould core and mould sleeve are appropriately matched to create an annular gap with decreasing cross-section so that the plastic melt begins a continuous dense tubular cladding around the core line.

How to remove the plastic accumulated in the dead space of the Plastic pelletizer?

To ensure that the plastic flow paths in the head are effective and to remove the dead space where plastic accumulates, a shunt sleeve is often placed, and a flash catcher is also set to remove the working pressure fluctuations during plastic extrusion. The head is also equipped with a device for die effect and adjustment, which is easy to adjust and affects the concentricity of the die kernel and top block.
Recycled waste plastics are firstly crushed into granules by crusher and then can be granulated after selection and cleaning. The model of waste plastic crusher is usually 30HP or above, but there are also small machines, depending on the recycled material.

In the actual use process, we should always pay attention to the maintenance and care of Plastic pelletizer in order to make the equipment get a longer service life and create more benefits and value for the company. For more information on how to maintain your Plastic pelletizer, please check out this article, Why should I be familiar with how to maintain my plastic pelletizer?
To explain in detail how to properly maintain your plastic pelletizer.