Professional extrusion manufacturers, injection and blow molding process is more suitable for the production of some containers with large volume but small volume. Cosmetics, daily necessities, medicine and food packaging in daily production are equipment produced by injection and blow molding method. The produced product has uniform wall thickness, no suture, less waste edge and waste.
Professional extrusion factory, the extrusion blow molding process is to extrude the parison. When the parison reaches the predetermined length, clamp the parison for positioning and then close it, forming or sizing the head of the parison. Compressed air is introduced into the parison for expansion to make it close to the mold cavity to form products. After the products are cooled and shaped in the mold, the mold is opened to remove the products, and the products are trimmed and decorated.
Stretch blow molding is a process method in which the parison, stretching and blow molding are completed in one machine. The parison is a semi-finished product in the production process. After cooling, the cold parison is reheated for stretching and blow molding. Directional stretch blow molding after extrusion, maintain a certain stretching speed, and orient before blow molding. After stretching, transparency, impact strength, hardness and rigidity, surface gloss and barrier are improved.