Plastic Blowing Moulding Machine

What are the influencing factors of the blow molding process of a water bottle blowing machine ?

1. Compressed air in blow pressure has two functions, inflation and cooling. Low viscosity, small volume or thick-walled parts should uselow air pressure; high viscosity High pressure should be used for large-volume or thin-walled parts or just have one

pet bottle air compressor to help.

2.Blowing speed In order to shorten the blowing time, in order to help the product obtain a more uniform thickness and a better surface, the inflation speed should be as large as possible, but the speed is too fast, it will easily cause the following phenomena: ① create a vacuum in the air, make this part When the parison is completely inflated, the indented part will form a diaphragm.

② The parison in the die part may be broken by the rapid air flow. 3. Inflation ratio is usually controlled at 2-4 times. If the inflation ratio is too large, the shape stability of the product is poor, and too small will cause uneven wall thickness. 4. Mold temperature and cooling time If the mold temperature is too low, the ductility of the plastic at the jaw will be reduced, it will not be easy to inflate, and the part will be thickened, and the molding is difficult. If the mold temperature is too high, the cooling time will be extended and the production cycle will be long. If the time is too short, insufficient cooling may easily cause deformation of the product, increase shrinkage, and matte surface. 5. The molding cycle includes extrusion parison, cutting parison, mold clamping, air blowing, cooling, deflation, opening the mold, and removing the product. Wait for the process. The selection principle of the molding cycle is as short as possible on the premise of ensuring that the product can be shaped.