How to choose an injection molding barrel screw?


Here are some of the most important tips for choosing t […]

Here are some of the most important tips for choosing the best barrel screw.

First, determine the type of material to be molded. Injection molding screws come in two main types: plastic and metal. The former is designed to convey the material to the mold or die, and the latter uses a screw to convey the material under pressure to fill mold cavities. Some materials become harder to melt, and a different screw design is required in certain circumstances. For instance, ABS material becomes more durable when molded, which makes it harder to extrude.

Choosing the right screw and barrel combination is critical to the overall success of the machine cell. Typically, the screw is selected after the barrel, which can cause a variety of problems. Ultimately, the screw must match the size and metallurgy of the barrel. Injection molding requires a screw with a large diameter, which increases its sensitivity to wear. As the screw size increases, it becomes more important to consider the metallurgy of the screw to ensure optimum performance.