Do you know the manufacturing process of plastic preforms for cosmetic packaging companies?

Information summary

The plastic preform of cosmetic packaging material adopts the injection molding method. Under certain temperature and pressure conditions, the plastic raw materials are filled into the cavity of the mold. Under the processing of the injection molding machine, the injection molding method is used to form and process from…

The plastic preform of cosmetic packaging material adopts the injection molding method. Under certain temperature and pressure conditions, the plastic raw materials are filled into the cavity of the mold. Under the processing of the injection molding machine, the injection molding method is used to form and process What comes out is an intermediate semi-finished product, which is then blow-molded into the final plastic preform product. Under normal circumstances, the equipment and tools for manufacturing plastic preforms include molds, injection molding machines, grinders, mixers, ovens, production workshops, purification workshops, etc. The types of preforms produced include plastic bottles, cosmetic boxes, oil drums, spray bottles, and shampoo plastic bottles. Next, the editor of cosmetic packaging material packaging will introduce the whole process of making plastic preforms.

In the process of making plastic preforms, the PET chips must first be injected into preforms. This link requires that the proportion of secondary recycled materials contained in it must not exceed %, and the number of recycling must not exceed times, as well as molecular weight and molecular weight. The viscosity should not be too low, the molecular weight should be controlled between, and its viscosity should be ..cm/g. Finally, preform products made by injection molding must be stored for more than hours before they can be used for months.

The quality of plastic preforms depends to a large extent on the quality of PET materials. Materials that are easy to inflate and easy to shape should be selected, and a reasonable preform molding process must be used. Many experiments have proved that imported raw materials are easier to blow molded than domestic raw materials for preforms molded from PET materials of the same viscosity. For the same batch of plastic preforms, the production date is different, and the blow molding process may also be quite different. The quality of the preform determines the difficulty of the blow molding process. The preform is required to be transparent, clean, free of impurities, and free of different colors. The length of the injection point and the surrounding halo are moderate.

The heating treatment of plastic preforms should be completed by a heating oven. The heating temperature is manually set and can be adjusted freely. In the heating oven, the far-infrared lamp emits far-infrared rays to radiate and heat the plastic preform, and then the fan at the bottom of the oven completes the thermal cycle to keep the temperature in the oven uniform, and the plastic preform will rotate while moving forward in the oven. , So that the inner wall of the plastic preform can be heated evenly.

Mainly engaged in plastic plastic cans and paper packaging products. After nearly five years of construction and development, we already have process equipment for the entire process of plastic plastic cans and paper packaging, with an annual output of more than 80 million plastic products. Comprehensive production capacity.