Two Cooling Methods For PVC Twin-Screw Granulators

The PVC Granulator is divided into two cooling methods: quench cooling and slow cooling. Quench cooling involves directly cooling the extruded material with cold water. This method is beneficial for forming plastic extruded cladding. However, for crystalline polymers, the sudden cooling can cause residual internal stress in the extruded cladding, leading to cracking during use.

Typically, PVC plastic layers use quench cooling.

Slow cooling is used to reduce internal stress in the product. In this method, cooling tanks are filled with water at different temperatures, allowing the industrial products to cool and mold gradually. For PE and PP extrusion, slow cooling is preferred, which involves cooling through three stages: hot water, warm water, and cold water.

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