How to solve the PVC extrusion mold paste phenomenon

PVC extrusion mold paste may be the first mold design unreasonable. There may be dead ends runners, PVC plastic long-term accumulation does not flow in this dead end, it is easy to paste.

1. Mold temperature is too high is the reason!

2. Process improper operation, the general case of this situation. I personally think that barrel temperature can be properly increased. However, the transition period, the oil temperature can be properly reduced, and the mold temperature is also reduced.

3. Irrational formula of PVC extrusion mold may lubricant system is wrong.

Technical data

Item Specification
Die steel P20/5CrNiMo
Material PVC
Width of the die 500mm-5000mm
Thickness of the product 1-20mm adjustable
Choked flow rope 90°
Way of flow passage clothes rack type
voltage 220V/50hz
Heating type heating inside 
Heater element stainless steel heating rod
Mode of connection closed cycled connection
Fastening piece 12.9 high strength
Precision of polishing Polishing precision of the stream surface of the die lip 0.03-0.04(μm)other parts is 0.04-0.05(μm)
Galvanization  the stream surface of the die head are treated by chrome treatment. Thickness 0.03-0.04(μm),hardness: 60-65Rockwellc,the chrome treatment thickness of the ektexine is 0.01-0.02mm.
Installation according costumer’s request
Way of charging central ring charging way

 

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