The gap between a screw and barrel

The gap between a screw and barrel in an injection molding machine can vary depending on several factors such as the material being molded, the size of the machine, and the design of the screw and barrel.

Typically, the gap between the screw and barrel can range from 0.05 mm to 1.5 mm.

For smaller machines or machines molding more viscous materials, such as thermosetting plastics, the gap may be smaller, around 0.05 mm to 0.25 mm. For larger machines or machines molding less viscous materials, such as thermoplastics, the gap may be larger, around 0.5 mm to 1.5 mm.

It's important to note that the gap between the screw and barrel is critical for maintaining a consistent and uniform melt. A larger gap can result in material degradation and inconsistent parts, while a smaller gap can cause excessive wear and increased energy consumption. It's important to follow the manufacturer's recommendations for the specific machine and material being used.