There are various plastic raw materials used in injection molding processing, and the types and forms of mold designs are also varied.
In addition, the operator’s familiarity with a specific injection molding machine, as well as the operating skills and practical experience of the workers are also different.
At the same time, the objective environment (such as ambient temperature, humidity, and air cleanliness) will also vary with seasons.
These objective and subjective conditions jointly determine the occurrence of defects in injection-molded products.
Generally speaking, there are three main aspects to evaluate the performance of plastic products:
- First, the appearance quality, including integrity, color, and gloss.
- Second, the accuracy between size and relative position, which means size accuracy and position accuracy.
- Third, the mechanical properties, chemical properties, electrical properties, etc. corresponding to the use, that is, functional.
Therefore, if there is a problem due to any one of the above three aspects, it will lead to the generation and expansion of plastic product defects, and it is mainly divided into aspects:
- Appearance Defects: silver streak discoloration, weld lines.
- Process Problems: flash, shrinkage, lack of glue.
- Performance Issues: warping, embrittlement.
