The Role of Temperature and Pressure Settings in Preventing Surface Defects in PP Insulation Board Extrusion

Introduction

PP Insulation Board production requires careful control of extrusion parameters to ensure smooth surfaces. Incorrect settings often lead to defects such as shark skin, pits, and orange peel patterns. This article focuses on how temperature and pressure influence these defects and how to adjust them for defect-free PP Insulation Board production.

1. Impact of Temperature Settings on Surface Quality

Incorrect melt temperature causes poor flow and surface roughness:

• Too high temperature degrades PP and forms black spots and pits.
• Too low temperature causes incomplete melting, resulting in shark skin and roughness.

Solutions:

• Optimize barrel and die temperatures for uniform melt flow.
• Use multi-zone heating control for stable temperature along the extruder.

2. Pressure's Role in Defect Formation

Excessive die pressure can cause melt fracture and shark skin, while insufficient pressure leads to flow marks and uneven surfaces.

Solutions:

• Balance pressure and extrusion speed to prevent surface instability.
• Use properly designed dies to reduce shear forces on the melt.

3. AI for Optimal Temperature and Pressure Management

AI technologies help in real-time monitoring and control:

• AI adjusts temperature and pressure dynamically based on surface quality feedback.
• AI analyzes historical production data to recommend ideal settings for PP Insulation Board.

Conclusion

Proper management of extrusion temperature and pressure is essential to prevent surface defects in PP Insulation Board production. Leveraging AI for monitoring and control can ensure consistent quality, minimizing shark skin, pits, and orange peel issues in PP Insulation Board.