Common issues in the hollow blow molding process include cracking, deformation, and oversized dimensions.
Cracking Issue: This is primarily caused by unstable material properties, inappropriate manufacturing temperatures, or poor product structural design. To address this issue, consider using high-quality, stable materials for production, setting appropriate manufacturing temperatures to ensure uniform product manufacturing, and adjusting the product structure to reduce stress points and enhance product strength.
Deformation Issues: Products tend to deform under high-temperature conditions. To address this issue, consider adjusting the manufacturing temperature to ensure uniform temperature control, modifying the product structure to reduce stress points, stabilizing the pressure control system, and determining a reasonable mold design based on the product's shape.
Size Exceeding Issues: This is primarily due to unstable manufacturing temperatures and uneven internal stress in the product. To address this, one can attempt to select stable, qualified raw materials, control the manufacturing temperature to ensure uniformity, adjust the mold structure to achieve structural balance and reduce distortion, and control the mold cooling water temperature to avoid excessive differences that lead to size control issues.
