Following factors can cause Injection Molding defects in plastic parts. By reducing their impact, defects in plastic parts can minimized:

Injection Molding Design Guidelines

Plastic part defects can be minimized by following plastic part design guidelines. But following all guidelines is not possible in actual practice. Therefore it is always a good practice to do moldflow simulation if design guidelines are violated.

Injection Mold Material Selection

Injection molding material also has an impact on molded part quality. For example, it’s very easy to mold ABS compared to a PC. Therefore it is recommended to consider a material Injection molding properties before the selection of plastic material.

Injection Mold Design

Gate type and Location, Type of Injection Mold. Cooling Lines, Injection Mold Material has a great impact on injection molded part quality. For example, increasing gate size can improve part filling. Therefore many defects can be avoided.

Injection Molding Process Parameters

Injection molding process parameters such as mold temperature, Material temperature, machine tonnage, Injection and hold time have great impact on plastic part quality. It is a good practice to finalize process parameters during initial part trials.