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Single-screw plastic extrusion equipment

Time：

2020-09-19

A single-screw plastic extruder uses only one screw to process the raw material, producing the desired finished product. In contrast, an extrusion machine equipped with two screws operating in tandem is referred to as a twin-screw plastic extruder. Single-screw plastic extruders are commonly employed for extrusion molding of plastic products; their key advantages include stable extrusion performance, excellent plasticizing capabilities, and easy control of the barrel temperature. Moreover, single-screw extruders typically require lower power and simpler drive‑system configurations than twin-screw extruders, helping to reduce overall equipment manufacturing costs. For example…

A single-screw plastic extruder uses only one screw to process raw materials, producing the desired finished products. In contrast, an extrusion machine equipped with two screws operating in tandem is referred to as a twin-screw plastic extruder. Single-screw extruders are commonly employed for extrusion molding of plastic products, offering advantages such as stable extrusion, excellent plasticization, and easy control of barrel temperature. Additionally, they typically require lower power and simpler drive‑system configurations compared to twin‑screw extruders, helping to reduce overall production costs. Unless there are specific production requirements, single-screw extruders are usually preferred for processing raw materials and carrying out extrusion molding. Common applications include the manufacture of plastic sealing strips, pipes, electrical cables, and various plastic sheets. Extruder models are classified according to the diameter of the screw; for example, a “90”‑type extruder has a screw diameter of 90 mm. When selecting an extruder, it is essential to match the equipment to the characteristics of the material being processed and to adjust the screw design based on the intended application, ensuring optimal performance. While single-screw extruders find broad use in practical production, the screw configuration must be tailored to the specific structure and type of each product during manufacturing.

A plastic sealing strip extruder is what we commonly refer to as a plastic extruder. Since many sealing strips in our daily lives are made of PVC, it is also called a plastic sealing strip extruder or an elastomer‑plastic extruder.

The applications of plastic extruders are not limited to the extrusion production of plastic sealing strips; they can also be used for extruding products such as plastic pipes and electrical wires. When manufacturing plastic products, it is essential to first adjust the raw material formulation based on the desired product quality and cost.

We use a mixer to blend the raw materials according to the formulation’s ingredient ratios. Once the ingredients are uniformly mixed, the blend is fed into a plastic pelletizing machine to produce the desired plastic pellets. A plastic pelletizing machine is a type of plastic extruder, so its production process is similar to that of a plastic strand‑extruding machine. After the pellets are produced, they are loaded into the feed hopper of the plastic extruder. From there, the pellets are conveyed into the barrel, where the screw performs shearing, compression, and compounding, among other processing steps. The material is then extruded through the die of the extruder to form the sealing strip in the required shape. Following water‑cooling, the final product is complete. Since product dimensions vary, the appropriate extruder model must be selected based on the specific application and requirements.

Hebei Shuangda Rubber & Plastics Machinery Co., Ltd. is a modern enterprise that integrates research and development, manufacturing, and sales of complete sets of extrusion equipment for rubber, silicone, and plastics. The company’s main products include rubber extruders, rubber hose extrusion lines, three‑layer composite sealing strip extrusion lines, silicone sealing strip production lines, plastic sealing strip production lines, plastic profile production lines, plastic pipe production lines, elastomer extruders, and other extrusion equipment, as well as production machinery for engineering seals, automotive seals, wire and cable applications, air‑conditioning hoses, braided hoses, automotive hoses, waterstop strips, and related products.