The use of
[u]Pet Preform[/u] temperature adjustment skills. The blowing mold is usually heated by the hot oil circulation method, and the blowing mold is adjusted in three cycles: the bottom of the bottle is cooled. The bottom of the bottle is kept at a low temperature (10 ° C ~ 30 ° C) to prevent the unstretched bottom portion from being overly crystallized and whitened.
Bottleneck temperature adjustment (optional). The portion of the non-crystalline bottle mouth is completely cooled after being released from the injection mold. Most of the non-crystalline bottle mouths are designed to strengthen the bottle mouth (increasing the wall thickness of the bottle mouth), and then improve the sealing performance to prevent deformation of the bottle mouth during the capping process. Usually, after filling, the ovality of the bottle mouth is controlled within 0.2mm, and the thread outer diameter shortening rate is less than 0.6%.
The bottle is hot oil circulating. The blow mold was heated to 120 ° C to 145 ° C. Thus, the temperature difference between the preform and the blow mold cavity is reduced to promote further crystallization. Extend the holding time of the blowing bottle so that the bottle wall and the cavity are in contact for a long time and have sufficient time to increase the crystallinity of the bottle to about 35% without destroying the transparency. The mold temperature below 100 °C has little effect on the crystallinity of the bottle body because the crystallisation of the bottle body occurs above 100 °C.
Jilian Plastic Mould is a professional
[u]China Pet Bottle[/u] manufacturer. We have many years of operational experience in the market. We can choose more and you can get more protection. Welcome interested investors to contact us.
The use of [u]Pet Preform[/u] temperature adjustment skills. The blowing mold is usually heated by the hot oil circulation method, and the blowing mold is adjusted in three cycles: the bottom of the bottle is cooled. The bottom of the bottle is kept at a low temperature (10 ° C ~ 30 ° C) to prevent the unstretched bottom portion from being overly crystallized and whitened.
