This article shares practical experience from daily injection molding and mold trial work, including plastic crusher operation, material recycling, injection machine purging, and mold modification management. It explains why proper plastic granulator shutdown procedures are important for preventing motor overload, machine jams, and difficult maintenance. The article also highlights real communication challenges between mold technicians and mold designers during mold correction and trial stages in the injection mold industry.

We met our Mexican customer and conducted the first trial of a refrigerator drawer mold with several defects, including shrinkage, cracking, and surface issues. After process adjustments like increasing mold temperature and optimizing machine settings, key problems such as shrinkage, cracking, and weld lines were resolved. Another trial revealed a slider stroke issue that required manual intervention, highlighting a mold design problem. Overall, most issues were solved through trial adjustments, with remaining ones planned for mold modification.