What impact does the design of the screw and sleeve have on the stability of the extrusion process and product quality?

As the core components of the blow molding extruder, the screw and barrel play a vital role in the extrusion process. Their design directly affects the stability of the extrusion process and the quality of the final product. A well-designed screw and barrel combination ensures that the plastic raw materials are fully plasticized, mixed evenly, and can flow and fill the mold stably during the extrusion process, thereby producing plastic products with perfect appearance and precise dimensions.

The pitch and groove design of the screw, as well as the inner diameter and internal surface treatment of the sleeve will directly affect the plasticizing effect of the plastic raw material. Through proper design, it can be ensured that the plastic raw materials are fully heated, melted and mixed during the extrusion process, so that they reach a state suitable for extrusion molding.

A well-designed screw and sleeve can effectively mix various raw materials and additives, ensuring that the plastic raw materials are fully mixed and evenly mixed, avoiding unevenness or excessive impurities, thereby improving product quality and consistency.

The design of the screw and sleeve also determines parameters such as compression ratio, screw speed and temperature control during the extrusion process. An appropriate compression ratio can ensure that the plastic raw materials are fully squeezed and flow evenly during the extrusion process, while appropriate screw speed and temperature control can ensure that the plastic raw materials are properly heated and plasticized during the extrusion process, thereby Ensure the quality stability and consistency of extruded products.

In addition to the above points, the appearance and dimensional accuracy of the product during the extrusion process are also directly affected by the design of the screw and sleeve. Through appropriate design, the uniform flow and filling of plastic raw materials during the extrusion process can be ensured, thereby ensuring the surface smoothness and dimensional accuracy of the product.