SJ-25 to SJ-150 Single Screw Extruder for PE Pipe Extrusion Line and Plastic Recycling Machine

Single screw extruders are the most fundamental and widely used continuous mixing and extrusion equipment in the plastic processing industry. These machines can be used for PE pipe extrusion lines, PPR pipe production lines, PVC garden pipe machines, TPE profile extrusion lines, and plastic recycling machines.

Single screw extrusion is defined as a low-cost process used in the polymer industry. This machine is mainly composed of a transmission system, feeding system, extrusion system (screw, barrel), heating and cooling system, and control system. Through the rotation of the screw in the heating barrel, plastic raw materials are conveyed, compressed, melted, homogenized and measured. Finally, a stable and continuous melt is formed through the die head, providing a foundation for subsequent processes such as granulation, film blowing, filament drawing and extrusion.

1. Feed Zone: Solid particles or powder enter from the hopper and are conveyed forward and preheated by the deep screw grooves of the screw.
2. Compression Zone: As the depth of the screw groove gradually shallowens, the material is subjected to intense shearing and compression, and begins to melt under the combined effect of external heat and frictional heat.
3. Metering Zone: The screw channel is relatively shallow and constant, further homogenizing, stirring and metering the already molten material to ensure the uniformity of melt temperature, pressure and composition.
4. Exhaust Zone (Optional): If it is an exhaust type model, vacuum is applied here to remove moisture, air and volatile substances from the material.
5. Die Forming: The uniform melt is forced through the designed die to form the required shape (such as strips, sheets, tubes).

• Plastic Modification and Pelletizing: Filling, reinforcement, blending, and masterbatch preparation
• Profile Extrusion: Primary extrusion of pipes, sheets, rods, and profiles
• Cable Sheathing: Overmolding extrusion for PVC, PE, and other cable materials
• Sheets and Films: Melt supply for calendering or casting processes
• Recycling and Regranulation: Regranulation of plastic waste
• Food and Pharmaceutical: Specialized hygienic models for producing food and pharmaceutical packaging materials
• Education and Research: Compact lab machines for process studies and formulation development

SJ-25mm: Can be used as a lab extruder in 3D filament extrusion lines, as a co-extruder in PVC window profile extrusion for rubber strip, and for making line strips in PVC pipe extrusion lines, HDPE pipe extrusion lines, and PPR pipe extrusion machines.

SJ-45mm: Can serve as a co-extrusion machine in WPC profile extrusion lines, roof tile extrusion lines, and plastic pipe extrusion lines. Also suitable for making small plastic pipes like PP, PPR, and PVC pipes.

SJ-75mm: Can be used to make soft PVC pipes, HDPE corrugated pipes, HDPE solid pipes, HDPE hollow wall pipes, and PPR pipes. Available in normal and high-speed configurations.

Sure. We are located in Zhangjiagang city which is very near Shanghai. For overseas customers, you can fly to Shanghai Pudong International Airport. We can pick you up at the airport (or Hongqiao International Airport). We also provide online visits by video.

Contact us with the product size, shape, annual quantity and photo if possible. We can recommend our machine models with quotation.

Yes, we offer all necessary spare parts before shipment. (Contact us for packing list)

We offer manual instruction and engineer training before loading. After shipment we provide 24 HRS online support, video technical support or field installation assistance.

For customized machines, it takes about 45-60 days after deposit. For stock machines, fast shipment is available. (The actual production cycle will vary according to the degree of customization.)

12 months warranty for components and technical support.

Most of our machines are customized. Our goal is efficiency and stable performance. We design the machines according to customers' products to meet their specific needs.

We can send experienced technicians to customer's country for guiding the installation and commissioning the machine, also training the customer's employees.

We provide customers with turnkey projects including plant design, plastic machine and mold installation, debugging, and we can source auxiliary equipment for customers. We can ship the full set of machines after testing in our factory, saving significant cost and time.