Actual Status Of Injection Molding Screw Barrel


    When the screw rotates and pushes the extruded raw material to move forward, the heat is transferred from the outside of the barrel to the raw material, and the volume of the thread groove is gradually reduced, so that the raw material is squeezed, turned and sheared while being pushed forward. . Under the action of various forces, the mixture is evenly mixed and plasticized into a molten state to complete the plasticization of the plastic.

    Classification of Injection Molding Screw Barrel
    The structure of the cylinder is divided into: integral, segmented, bushing, casting, and bimetallic cylinders.
    All-in-one barrel: In injection molding machines and extruders, most applications are all-in-one barrels, especially small and medium-sized models, which basically adopt this structure. The barrel is generally 38CrMoALA. Moreover, the temperature control is accurate and easy, and the machining accuracy is relatively easy to guarantee.
    Segmented barrel: Mainly used for larger extruders and vented extruders. Since the full length of the barrel is composed of several sections, the processing of each section of the barrel is much more convenient, and the temperature control error of heating and cooling is relatively large.
    Rubber screw barrel classification
    The barrel is generally designed as an integral type, and multi-stage combined barrels are rarely used now.
    In the solid conveying theory, how to improve the solid conveying capacity is discussed, mainly from the reasonable selection of screw structure and technical parameters, but the improvement of the solid conveying capacity is not significant, and the efficiency is only 20%-40 %.

    After understanding the above content, you may be interested in other products. In fact, at Yingtai, we also have Single Screw Barrel for people to choose from. If you are interested, you can contact us.