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| Chenxing’s Sj series extruder machine delivers 30-300kg/h output with 25% energy savings. CE-certified for plastic pelletizing and recycling. | |||||||||
SJ
Chenxing
Product Description

Single Screw extruder for PP/PE/PPR/PET/PER/PVC granules material is mainly composed of barrel screw, momentum driving system, heating, cooling, and electric controllers etc. It is imainly used in plasticizing and extruding of PVC, PE, PP, ABS, PS, PET pipes, plates, sheets, film, profiles, granulates and other plastic products.
1. Strainer is used before the material enters into the calender to filter out agglomerates and other impurities to protect the calender roller for longer service life.
2. There are single or double heads available, hydraulic station for strainer head locking and opening. The mould can be changed easily, and it will open automatically when the power brake.
3. The machine is mainly used for thermoplastic rubber material's mixing, modification and extrusion molding.
4. The briquetting of rubber semi-finished products, filtering rubber, covering rubber on cable and wire.
5. Hot-feed and single-screw rubber extruder.
6. The rotation speed could be adjusted as you like.
7. By changing the handpiece, we can get different types of rubber-covering semi-products,so it is widely used.
8.PLC intelligent control, can realize the linkage between the main and auxiliary machine.

Product Parameters
Model , Data | SJ-30 | SJ-45 | SJ-55 | SJ-65 | SJ-75 | SJ-90 | SJ-100 | SJ-120 | SJ-150 |
Screw diameter (mm) | 30 | 45 | 55 | 65 | 75 | 90 | 100 | 120 | 150 |
Ratio (L/D) | 25 : 1 | ||||||||
Main motor power (kw) | 4 | 7.5 | 11 | 15 | 22 | 37 | 45 | 55 | 75 |
Barrel heating power (wk) | 3 | 6 | 9 | 12 | 18 | 30 | 36 | 42 | 56 |
Central height (mm) | 1000 | 1100 | 1200 | 1300 | |||||
Screw rotation speed (r/min) | 140 | 120 | 100 | 90 | 85 | 75 | 70 | 60 | 60 |
Plasticization capacity (kg/h) | 30 | 50 | 70 | 80 | 100 | 130 | 160 | 200 | 300 |
Remarks: all information above is only for refererence; please gather the exact data by contacting us.
FAQ
China has become one of the largest manufacturing centers for PVC pipe extrusion machinery.Global buyers choose Chinese suppliers because of:· Competitive pricing· Mature manufacturing technology· Fast delivery· Customization capability· Complete turnkey solutionsWhen selecting a manufacturer, buyer
PVC pipe manufacturing begins with raw material preparation.PVC resin, stabilizers, lubricants, and fillers are mixed in a high-speed mixer.The mixed material enters the conical twin screw extruder where it is heated and plasticized.The melt flows through the die head to form the pipe.Vacuum calibra
Energy consumption is one of the largest operating costs in PVC pipe manufacturing.Modern extrusion technology focuses on:· High-efficiency motors· Intelligent heating systems· Optimized screw structures· Automated process controlVariable frequency drives help reduce electricity waste during operati
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A complete PVC pipe extrusion line is more than just an extruder.The full system includes:· High-speed mixer· Material loader· Conical twin screw extruder· Extrusion mold· Vacuum calibration tank· Cooling tank· Haul-off machine· Cutting machine· Pipe stackerThe mixing unit prepares PVC resin and add
Stable pipe quality is essential in PVC pipe manufacturing.Common extrusion problems include:· Uneven wall thickness· Pipe collapse· Surface roughness· Yellowing· Diameter instabilityThese issues are usually related to:· Incorrect temperature settings· Poor raw material formulation· Vacuum instabili
Different PVC pipe diameters require different extrusion configurations.Small-diameter pipes such as electrical conduits usually use multi-cavity extrusion systems to maximize output.Large-diameter water supply pipes require:· Larger extruders· Stronger vacuum calibration systems· High-capacity cool
Choosing between a single screw extruder and a twin screw extruder is one of the most important decisions in PVC pipe manufacturing.Single screw extruders are mainly used for PE, PP, and other polyolefin materials. They offer stable conveying performance and lower maintenance costs.Twin screw extrud
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