The operation error of the hot runner mold of the injection mold and the defects of the typical TPU plastic product are particularly prone to errors when operating the hot runner mold, which directly leads to related defects of the molded part.
Many of the disturbances come from the periphery of the hot runner system and are independent of the use of the hot runner system. (content comes from the network)
The possible causes and repairs of the most severe disturbances are now discussed.
I. Leakage of the hot runner system of the injection mold When the seal in the hot runner system fails and the pressure in the system exceeds the clamping force of the system components in the pc injection mold, melt leakage occurs in most cases.
The first alphanumeric of the melt leak is the slow heating of the runner plate.
Here are some of the reasons for the leak and how to fix it.
Leakage reason and repair method of pc injection mold hot runner system
Reason ------ repair method
First of all, the central support pad is too high ------ fit in place
Second, the central support pad pressure into the template ------ new, reduce the cylinder holding force pressure
Third, the support pad ------ too low, can not replace or reduce the flow plate mold frame
Check the number and position of the screws, not affected by the fastening screws ------- TPU plastic products
5. When the mold is disassembled, the sealing ring is not updated ------ update the nozzle overheating ------ check / update the thermocouple six, the flow plate overheat ------ check / update the thermocouple, check / repair Possible sinking or deforming pressure ring and support pad on the mold
