About

Common malfunctions & solutions during XPS production

2017-01-04

         Hangzhou Epsole Technologies Co., Ltd

                     ---Common malfunctions & solutions during XPS production 


              QQ图片20160421165033.jpg


Malfunctions 1: The board after the calibrator has honeycomb, longitudinal crack, fish skin stripes.
 


Reasons:Solution:
1The temperature of the material is too high.Increase the cooling water, reduce the frequency of the secondary extruder, increase the quantity of the injection foaming agent.
2The temperature of the die lip is too high.Lower the temperature of the die lip.
3The gap between the die lips is too large.Release the wire, tighten the top wire.
4Something wrong with the oil temperature controller.Check the cooling oil is enough or not, the cooling water is open or not.
5The oil pipe is connected wrongly.Check the inlet oil pipe and the outlet oil pipe.
6Die lip semi-circular arc is not smooth.Clean it.


Malfunctions 2:Board longitudinal groove.


Reasons:Solutions:
1The outlet material of the die lip is not uniform, the groove outlet material is not enough.Larger the groove outlet gap.
2The die lip is too high.Lower the temperature of the slot die, material, increase the foaming agent injection.
3The calibrator pad is too high.Adjust it.


Malfunctions 3: Board horizontal wave.


Reasons:Solutions:
1Comparing with the die lip thickness, the gap is too small, the outlet material is not enough.Increase the die lip.
2The calibrator pad height and the outlet is mismatch.Adjust the calibrator pad height gap.
3Foaming agent is too much.Reduce the foaming agent.
4Cooling water is too much.Increase the frequency of the secondary extruder or shut down the cooling water.
5The pressure is not enough.Adjust the frequency and foaming agent.
6Comparing with the thickness, raw material foaming rate is too low, talc is too much.Change the raw material and get rid of the talc.
7The temperature of the die lip is too low.Increase the die lip temperature.


Malfunctions 4: Board surface has bubble.


Reasons:Solutions:
1The die lip is too large comparing with the material temperature.Reduce the die lip gap.
2The temperature of the material is high.Lower it.
3The raw material is not good.Change to the high melting point material.


Malfunctions 5: Longitudinal crack


Reasons:Solutions:
1The die lip temperature is too high.Lower the temperature.
2The calibrator pad temperature is cold.Heating the calibrator temperature to 78~80℃.
3Too much foaming agent.Lower the foaming agent quantity.
4The die lip is not smooth.Fix it.
5Tetrafluoroethane is not smooth.Change it.


Malfunctions 6: The surface of the board pores, the surface shot blasting


Reasons:Solutions:
1There are water in the raw material.Change the material.
2Too much foaming agent injection.Reduce the foaming agent injection.
3Material is not continuous, stuck, slipChange the material.
4The melt material temperature is too high.Lower the frequency of the secondary extruder, or open the cooling water.
5The flow rate is too low.change the material.
6Mixing is not enough.Add mixing section, or heat exchanger.


Malfunctions 7: Board surface thickness is not uniform.


Reasons:Solutions:
1The gap between the top die lip and bottom die lip is not uniform.Check if the motor lead screw is loose or replace the belt.
2Melt temperature problem.The lower the melt material temperature is, the situation is more serious.
3Two side temperature are different, the difference is too much.Adjust it.



Contact information

Email:info@epsole.com

Web: www.epsole.com

Mob: +86-15669029319

Prev: Full EPS Pallet Production Line

Next: EPS Moulds OEM Services

BACK