How many types of parallel twin screw barrels are there?


The Parallel Twin Screw Barrel has good performance, su […]

The Parallel Twin Screw Barrel has good performance, such as reasonable screw structure, high plasticizing effect, and stable extrusion. Its spiral surface is coated with double-alloy spray welding, which ensures high wear resistance. This screw barrel has large load-bearing torque and low energy consumption. Its high-quality raw materials enable it to have a long service life and a good damage resistance ability.

Unlike conical twin screws, the Parallel Twin Screw Barrel has the same diameter of its effective part and is wider than its conical counterpart. The length-to-diameter ratio of a parallel twin screw is identical to its conical counterpart. The apex of the conical twin screw is wider than its diameter. Due to its modular construction, its size can be adjusted to meet various requirements. It has a large center distance, which is ideal for large-scale products and applications.

The Parallel Twin Screw Barrel is available in different styles. The screw structure can be double-variant, hybrid, super-tapered, and granulation. Different screw types require different compression ratios. It is advisable to choose the screw model that best suits the formulation and process requirements. Besides, the barrel wear is made of special alloy steel. This can increase its service life. For larger production, a longer service life is essential.

In the first case, the upper plate is pushed downward by the screw. On the other hand, the upper plate moves at right angles to the screw axis, creating circulation patterns in the gap. The relative movement between these two extremes is somewhere in between. It depends on the pitch of the screw. When the upper plate moves down, the material in the lower screw remains confined by the flight. The pressure is higher when the two screws are fitted together tightly. This leads to wear and tear of the screws.