External impurities or contaminants being introduced into the mold and embedded into the plastic part can result in the presence of impurities inside the plastic part, which is a common quality issue in the injection molding process. These contaminants may originate from particles on the tool surface, material contaminants or foreign object fragments in the barrel, and material overheating and burning before injection, among other factors.
Causes of Embedded Contaminants
The raw material contains impurities, excessive moisture, or has not been properly mixed.
Aging, improper use, or inadequate maintenance of the injection molding machine.
Material overheating and burning before injection.
Remedies for Embedded Contaminants
Regularly perform thorough cleaning of molds, tools, and barrels.
Use clean raw materials free from impurities.
Set injection temperatures appropriately.
Perform regular maintenance and inspections of equipment.
