F.Longitudinal Grooves Appear on the Surface of Foam Board

Longitudinal Grooves Appear on the Surface of Foam Board

The appearance of longitudinal grooves on the surface of XPS, EPS,

and PET foam boards is a common problem during the manufacturing process.

We provide corresponding solutions for different causes.

Impurities at the mold outlet scratch the foam board:

1. Loosen the screws in the corresponding part of the mold outlet to allow the residue to be discharged with the material.

2. Use a copper rod to tap the surface of the mold to dislodge the impurities and

allow them to be discharged from the mold with the material.

3. Use a water gun to cool the corresponding area of ​​the mold surface,

allowing the material to cool and harden while removing impurities.

4. Use a needle or feeler gauge to clean the mold outlet and remove impurities