What factors should be considered when choosing a barrel screw?

August 08, 2022

What factors should be considered when choosing a barrel screw?

Several factors should be considered when selecting the cylinder screw of injection molding machine. First, the feed throat temperature must be sufficient. Too cold and volatiles will condense in the barrel. It's so hot that a film of molten film forms between the fins and the barrel walls. Trapped air can also cause parts to spatter or bubble. Proper feed throat temperature minimizes these problems. If these factors are not addressed, your parts may fail.

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Injection molding machine barrel screw is designed for all plastic processing machines. These precision-designed screws have a locking design for faster, more consistent closure. These screws have a locking ring and the tip of the screw is in the same position for each rotation. The screw is designed to mix the molten plastic before it enters the mold.
PM alloy screws have excellent wear resistance compared to conventional tool steels. It is available in a variety of materials, including stainless steel and titanium. PM alloy screws are ideal for injection molding applications due to their superior wear resistance.
As screw diameter increases, screw design becomes more important. Its shape and metallurgy have a greater influence on the melting process than the heating belt and other components. Small screw diameters require different material mixing and metallurgy. Therefore, the proportion of screw and barrel should be based on material properties, screw design and metallurgical factors.

Injection molding machine barrel screw is a kind of multifunctional tool used in plastic and metal processing. The diameter and length of barrel screw are the key factors affecting the overall quality of plastic parts. The size of the barrel should be suitable for the production capacity. A larger diameter will result in a higher quality product. The injection molding machine barrel screw will ensure that the final melt temperature is consistent.

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