I just began my new job. We have a rigid PVC product ('W' shape).
The engineering quote extrusion speed is 1500ft/hr, while our actual
extrusion speed is 700ft/hr. This made we lost a lot of money. We
found if we speed it up, the product would be burned and smoked.
Someone said the problem is we don't have good cooling system for the
die (when the speed is high, the temperature of the die will go up and
can not drop down). While I think it may have some relationship with
the die design. Would someone give me some idea? If it was the
cooling system, what we should do (buy new oil cooling system is very
The wall thickness of the product is 1mm. We are using the 3 1/2"
single screw extruder. We can use this extruder extrude thick
products without any problem with 1500ft/hr.
Thank you very much!!!
18 years ago