In the process of producing plastic bottles, the process control of hdpe pill bottles is very strict. If you want to make the quality of the bottle good, it is necessary to improve its heat resistance. It is mainly carried out according to the control of injection cooling time, the selection of reasonable design, the strict control of injection and drawing, the circulation blowing technology, and the application of temperature control technology of blowing mold.

1, hdpe pill bottles injection cooling time control

Strictly control the injection cooling time of hdpe pill bottles, so that hdpe pill bottles can be released as soon as possible. This can shorten the molding cycle and increase the yield, and can induce spherical crystallization due to higher residual temperature.

2, choose a reasonable hdpe pill bottles and bottle design

The optimized shape design of the hdpe pill bottles and the design of the bottle mold help to improve the wall thickness distribution of the bottle and avoid distortion or shrinkage in different areas of the bottle.

3. Strictly control injection and drawing

Blowing process parameters and temperature distribution in each area to avoid residual stress release at PET glass transition temperature resulting in deformation of hdpe pill bottles.

4, circulation blowing technology

When the hot blow mold is used, how to control the deformation of the bottle after stripping is very important. Before opening the mold, air is blown in and emptied to cool and shape the bottle, thus controlling the amount of deformation after demoulding. The intake of the circulating cooling air passes through the same channel as the initial and secondary blowing, but the air is discharged through the small hole at the head of the drawing rod.

5, the use of blowing mold temperature control technology

Usually, the hot oil circulation method is used to warm the blow mold. There are three cycles for the temperature control of the blow mold: the cooling water cycle at the bottom of the bottle. The bottom of the bottle is kept at a low temperature of 10℃-30℃ to avoid excessive crystallization of the unstretched bottom of the bottle and becoming white.

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