Development of two-step blowing PET bottle
by：Yosion Machinery 2022-09-16
The development of two-step injection-blown PET bottles Two-step injection-blown PET bottles are more and more widely used. At present, not only ordinary 600mL mineral water bottles, but also many medicine bottles, oil bottles and cosmetic bottles are also used more and more. This is mainly due to the quality of the mouth of the injection-blown PET bottle and the good transparency of the bottle itself, and the two-step production has the advantages of low investment cost and high efficiency, plus PET is non-toxic and tasteless, which meets the requirements of food hygiene. Recently, pure water bottles have also replaced the original PC bottles with PET bottles, because the use of PET bottles can greatly reduce the cost. As the bottle becomes thinner, the requirements for the quality of the preform are getting higher and higher, so not only the precision of the core is very high, but also the guiding requirements for the injection molding machine when opening and closing the mold are also very high, and the clamping force applied after the mold is closed is also very high. To be balanced. In order to avoid the cracking of the bottle mouth, it is necessary to eliminate the mechanical vibration before opening the mold. For these two points, it will be very difficult to realize the toggle type (machine hinge) injection molding machine. Therefore, many manufacturers producing mineral water preforms are already considering next year. How to meet this challenge.