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Screw and Barrel for Rubber Extrude manufacturers take you to understand the common materials of extruder screws
Screw and Barrel for Rubber Extrude manufacturers tell you that the extruder barrel screw is a molding processing method with many types of production, many changes, high production rate, strong adaptability, universal use and a large proportion of output in the field of polymer processing. It has easy control, simple process control, good mixing and plasticizing ability, short residence time of materials in the extruder, suitable for powder processing, large output, fast extrusion speed, and low output and energy consumption.
However, in daily use, a large number of customers will encounter the slippage of the extruder barrel and screw, which will not only cause material degradation, but also easily affect the product quality. So what are the reasons for this phenomenon and what are the "culprits"? Screw and Barrel for Rubber Extrude manufacturers tell you that before this, let everyone understand the common materials of extruder screws, so as to better understand the reasons for slippage.
Screw and Barrel for Rubber Extrude manufacturers tell you that there are many reasons for screw slippage, which may be related to poor material, high back pressure, overheating or undercooling at the end of the barrel, wear of the barrel or screw, too shallow thread in the feeding section, and design of the hopper. Unreasonable and the hopper is clogged, the resin is wet, the resin is too smooth, the material is too fine, or the unreasonable cutting of the resin and recycled material is related.
Screw and Barrel for Rubber Extrude manufacturers tell you that when the screw slips, the material may gather at the feeding port and cannot be delivered to the end of the injection machine normally. When the screw rotates and retreats in the barrel to transport the material and prepare for the next injection, screw slip occurs in the plasticizing section. At this time, the rotation of the screw continues, but the axial movement of the screw will stop, that is, slippage occurs. Screw slippage often leads to material degradation before injection, resulting in reduced production quality (such as material shortages), and longer molding cycles.