Process conditions for blow molding

The compressed air required to inflate the parison in the mold must be clean. Injection blow molding air pressure is 0.55 ~ 1MPa; extrusion blow molding pressure is 0.2l ~ 0.62MPa, and stretch blow molding pressure often needs to be as high as 4MPa. In the solidification of plastics, low pressure makes the internal stress of the product low, the stress distribution is more uniform, and the low stress can improve the tensile, impact, bending and other properties of the product.