What Precautions/We should do for mold trial? 2-2

1.     During the machine adjustment process, if you need to stop the machine for more than 30 minutes , please drain the remaining material in the barrel before leaving. When you start the machine again, drain the material into the air three times to prevent the remaining material in front of the nozzle from being retained for a long time at high temperature and causing decomposition or carbonization. (When using high-temperature glass fiber materials such as PC, PA , PBT , etc., the barrel temperature can be reduced to 150 ℃ or the barrel temperature can be turned off.)

2.     If the plastic part sticks with mold during the mold trial, do not use hard metal such as iron or steel to knock the product to force it out. You can use a blowtorch to burn a paper clip and insert it into the product, and then take it out after it cools down. If a mold with a complex structure stick, please remove the mold and hand it over to the mold department for processing.

3.    When testing new products, it is best to set a variety of molding conditions in consideration of the shrinkage of the product itself, because mold temperature, cooling time, and pressure have a great impact on product dimensions.

      When testing molds with multiple cavities, it is also necessary to confirm whether the sample filling speed is consistent. Problems during the trial process should be recorded in the "Trial Process Record" and sent to the mold inspection department together with the samples.

4.     During the adjustment of molding conditions, each time a molding parameter is adjusted, continuous production must be carried out until it stabilizes (requires more than 3 molds), and the change and product appearance must be observed before the next parameter adjustment can be made.

5.     Cycle time are required within the target; pressure cannot be full load ; size cannot be limit. When a condition is found, various parameters should be adjusted by plus or minus 20% and then samples should be made to confirm whether there are any appearance problems.