Pvc pelletizing machine granulation method

Pvc pelletizing machine granulation method and precautions

1. Process parameters are the core elements of pvc pelletizing machine extrusion granulation.

If the process parameters are incorrect, even the best formula and PVC cable granulator will be difficult to produce qualified products.
Whether the process parameter setting is reasonable directly affects whether the semi-finished product is fully mixed, plasticized evenly, and whether the preliminary pre-plasticizing effect can be achieved.
Otherwise, it will not only cause problems in product appearance and performance, but also easily produce abnormal quality during deep processing.

2. In the process of collecting, crushing, demagnetizing and sorting waste PVC cable materials, foreign objects should be carefully selected.

Can not be mixed with PE, XLPE and other materials and PVC cable tape.
Metals such as copper, aluminum and wood chips must be separated to ensure that the waste PVC cable material is clean and free of debris.

3. The waste PVC cable material after crushing and bagging is stirred and mixed at a mixing temperature of 70~85℃ for 4~5min.

Add the mixed PVC material into the double-stage plastic granulation unit for extrusion granulation.
The extrusion temperature was (150±5)°C. The granulated pellets need to be dispersed and cooled to prevent the pellets from sticking.

5. When the waste PVC cable material is granulated for the second time. the filter screen should be replaced regularly in strict accordance with the process requirements. Check the exhaust regularly.

Generally, 3~4 layers of 60~100 mesh stainless steel filters are replaced every 2~3h. In order to prevent the filter screen from being broken by impurities and coke materials in the waste PVC cable material.
When the inner liner is extruded. the spark rate of the cable sheath is high due to the mixing of impurities, and the voltage breakdown occurs.

6. The PVC special material produced by the secondary granulation should be used in time. it should not be placed for too long.

To avoid moisture absorption of materials, it is recommended that the storage time should not exceed 1 month.