What is the role of a screw barrel in the recycling granulation process?- Zhoushan Jiading Plastic Machinery Co., Ltd.

The screw barrel plays a crucial role in the recycling granulation process. Its primary function is to melt, mix, and convey the recycled material (such as plastic flakes or pellets) through the extruder to convert it into uniform granules or pellets.

Here are the key roles of the screw barrel for recycling granulation:

1. Feeding and conveying: The screw barrel helps in the continuous feeding and conveying of the recycled material from the hopper to the extruder. It ensures a steady flow of material into the extruder for further processing.

2. Melting and mixing: The screw barrel has sections with different flight configurations and depths that enhance the melting and mixing of the recycled material. The rotation of the screw generates heat through friction, which helps melt the material while promoting efficient mixing and homogenization.

3. Pressure and compaction: As the material moves along the screw barrel, the decreasing channel depth and increasing pressure build-up facilitate compaction and densification. This eliminates air pockets and enhances the quality and density of the granules.

4. Filtering and degassing: Some screw barrels for recycling granulation may include provisions for filtering and degassing. Fine screens or meshes can be incorporated to remove any contaminants or impurities present in the recycled material. Additionally, special venting zones may be designed to allow gases and volatile compounds to escape during the melting and processing stages.

Single screw barrel of recycling granulation machine