Constant Temperature To Keep The Pet Bottle Preform Stable

  • 1. Equipment: With the continuous advancement of technology and the expansion of production scale, the degree of automation of pet blowing machine is getting higher and higher, and the production efficiency is getting higher and higher. Equipment production capacity has increased from the previous production of thousands of bottles per hour to the current production of tens of thousands of bottles per hour. The operation has evolved from the past manual button type to the current full computer control, which greatly reduces the difficulty of the operation process and increases the stability of the process.
    2. Preforms: Preforms depend to a large extent on the pros and cons of PET materials. It should be easy to select materials that are expandable and easy to form, and a reasonable preform molding process. Experiments show that imported preforms with the same viscosity of PET material are easier to blow molding than imported raw materials; the same batch of preforms, different production dates, and blow molding processes may also differ greatly. Preforms are difficult to determine the advantages and disadvantages of the blow molding process. The requirements for the preform are pure, transparent, free of impurities, no different colors, focal lengths, and ambient halos.
    3. Heating: The preform is heated by the heating furnace, and the temperature is manually set and automatically adjusted. The oven emits far-infrared radiation from the far-infrared lamp to heat the preform, and the bottom of the fan is heated by the oven to make the oven temperature uniform. The preform wall is heated evenly as the preform is rotated forward in the oven.
    4. Auxiliary and mold: mainly refers to the auxiliary equipment to maintain the mold temperature. Mold temperature plays an important role in maintaining product stability. Generally, the temperature of the bottle is high and the temperature at the bottom is low. For cold bottles, the temperature at the bottom of the bottle is much higher, because the cooling effect of the bottom of the bottle determines the degree of molecular orientation, and the temperature is controlled at 5 - 8 ° C.
    5, the environment: the quality of the production environment has a greater impact on the process adjustment, constant temperature conditions can maintain the stability of the Pet Bottle Preform process and product stability. PET bottle blowing machines are generally better at room temperature and low humidity.