There may be many misunderstandings in the operation and debugging of domestic blow molding machines
. 1. Lack of cooperation between the main engine factory and the mold factory. The main engine factory and the mold factory must cooperate. This is the experience of developing injection-stretch-blow plastic molding machines abroad. The main engine factory puts forward the requirements, the mold factory develops it, and then hands it to the user for use. However, some of our main engine factories themselves do not know much about the molds of the "one-step" injection-stretch-blow plastic molding machine. In order to save development costs, they make their own molds. As a result, not only the products do not meet the quality standards, but also the main engine image had a negative impact.
2. The technical level of the mold does not meet the requirements. The mold of the injection stretch blow plastic molding machine is different from the injection molding mold and has its own characteristics. In the mold of injection stretch blow plastic molding machine, the key is the mold for injection parison. The material of the mold has special requirements for its performance, the coefficient of thermal expansion and contraction is small, the heat transfer efficiency is high, and the thermal conductivity is high. The structure of the mold is a hot runner. form. Judging from the current level of mold technology in China, it is still impossible to develop and manufacture molds for injection-stretch-blow plastic molding machines that meet quality standards. It is understood that some mold factories do not know which material is used for the mold of the injection-stretch-blow plastic molding machine. How can they develop a mold?
3. Lack of investment in the mold factory The lack of input in the mold factory prevents the development of the mold technology level. It is understood that foreign mold factories that develop and manufacture injection-stretch-blow plastic molding machines have their own injection-stretch-blow plastic molding machines. The developed molds must be repeatedly tested on the host until they meet the requirements. However, there is no domestic mold factory that has purchased injection-stretch-blow plastic molding machines as trial production equipment for the development of molds for injection-stretch-blow plastic molding machines.
Fourth, there are misunderstandings in the development ideas. When developing plastic molding machines, enterprises only focus on the development of the main engine and ignore the development of molds. The injection stretch blow molding machine is a combination of the main machine and the mold. From the importance of the main machine and the mold to the whole machine, the main machine only accounts for 40% of the whole machine, while the mold accounts for 60% of the whole machine. The successful development of the main engine does not mean the successful development of the whole machine. Only when the main engine and the mold are jointly developed can we say that the injection stretch blow molding machine has been successfully developed. In the process of developing injection-stretch-blow plastic molding machines, some of our plastic machinery factories did not correctly recognize the relationship between the host and the mold, and only paid attention to the development of the host, instead of putting the development of the mold in a more important position, failure The main reason is this