Hot runner mould is the use of heating device makes the melt in the runner not missing solidification of mould, the formation of the cycle a lot, but also can save raw materials, so the hot runner mold has a very wide range of use.At present, the publicity about the hot runner is mostly on its advantages and disadvantages, the paper but little about what problems may arise in the use and how to avoid these problems the analysis and introduction, and these tend to be the customer’s need to know.
In China, people have become accustomed to using cold runner mold, for such a new mould of hot flow path, whether in theory or in practice, people know little about its understanding, even some people think that is just on the injection machine in a set of mould.
It’s certainly not as easy to use a heat flux as some people understand (just another set of molds on the injection machine).On the technical level, it puts forward higher requirements on all aspects of its cooperation.
On the one hand, it requires that the injection molding machine must be able to provide stable molding conditions, such as mould force, injection pressure, temperature and other relevant molding parameters to match the requirements of hot runner mould.
On the other hand, the raw materials used must be pure enough that they are not allowed to be used in general.Because if the impurity content in raw material is too high, it is possible to cause the blockage of the flow nozzle, and cleaning the flow path is a time-consuming and arduous task, resulting in long production shutdown.
Tell from the operation procedures, the use of hot runner mould is very different from previous cold runner mould, for example, in order to avoid the stranded at the end of nozzle and the cold in the cylinder material into the mold, the general requirements for an empty before formal production note, as will be stranded in the nozzle and the cylinder material out.This requires the enterprise to completely change the casual production practices that have been formed in the past, and formulate strict and detailed operating procedures.
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