The manufacturing process of plastic water bottles mainly includes the following steps:
Raw material preparation: The main raw material is polyethylene terephthalate (PET) resin, and stabilizers, colorants, etc. are added as needed.
Injection molding: The mixture of PET resin and additives is heated and melted and injected into the mold to form a preform. The preform is cooled and solidified in the mold to form a preliminary shape.
Pretreatment: The preforms are stored in a dry, dark environment and preheated before blowing to reach a temperature suitable for blow molding.
Blow molding: The preforms are fed into the blow molding mold and inflated laterally by high-pressure gas to fit the inner wall of the mold to form the final bottle shape. The bottles are cooled and shaped in the mold.
Quality inspection and packaging: After the molded bottles undergo quality inspections such as appearance inspection, size measurement, and pressure testing, qualified bottles are packaged and stored in the warehouse.
