How can scratches and pitting on the surface of PVC foam boards be addressed?
Category: Industry News
Release Date: 2020-04-16
Summary: ① Scratch elimination: Inspect the traction unit, cooling water tank, and cutting machine table for contaminants and sharp protrusions; promptly clean and grind these areas to ensure smooth surfaces. Adjust the pressure of the traction unit’s press rollers to prevent excessive pressure that could cause hard friction between the sheet and the equipment. Additionally, install soft support rollers and protective pads along the sheet transport path to reduce contact wear. ② Mottling elimination: Enhance the drying degree of the raw material to remove moisture that can lead to the formation of tiny air bubbles. Clean the die flow channels of carbonized and accumulated material to ensure uniform melt discharge. Appropriately increase the die temperature to promote more thorough melt plasticization and minimize unplasticized particles. Finally, optimize the mesh count of the filter screen and increase the number of filtration stages to remove hard particulate impurities from the raw material.
① Scratch elimination: Inspect the traction unit, cooling water tank, and cutting machine table for contaminants and sharp protrusions; promptly remove any such obstructions and grind surfaces smooth. Adjust the pressure of the traction unit’s pressure rollers to prevent excessive pressure that could cause hard friction between the sheet material and the equipment. Additionally, install soft support rollers and protective pads along the sheet-material conveying path to reduce contact wear.
② Addressing pinholes: Increase the dryness of the raw material to eliminate microbubbles caused by moisture; clean out carbonized and accumulated material in the die flow channels to ensure uniform melt discharge; appropriately raise the die temperature to achieve more thorough melt plasticization and reduce the presence of unmelted particles; optimize the mesh count of the filter screen and increase the number of filtration stages to remove hard particulate impurities from the raw material.
Keywords: How can scratches and pitting on the surface of PVC foam boards be addressed?
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