SJ-25/25 Laboratory mini plastic single screw extruder machine

Laboratory mini plastic single-screw extruder machine is specially designed for the experiments of PVC, PP, PE, PS, ABS extruders; Product development, as well as sample or small batch production of some plastic enterprises.

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Application range of plastic single screw extruder:
A1: Pipe extrusion: suitable for PP-R pipes, PE gas pipes, PEX cross-linked pipes, aluminum-plastic composite pipes, ABS pipes, PVC pipes, HDPE silicon core pipes and various co-extruded composite pipes.
A2: Sheet and sheet extrusion: suitable for extrusion of PVC, PET, PS, PP, PC and other profiles and sheets. Extrusion of various other plastics such as wire, rod, etc.
A3: Extrusion of profiles: adjusting the speed of the extruder and changing the structure of the extrusion screw can be applied to the production of various plastic profiles such as PVC and polyolefins.
A4: Modified granulation: suitable for blending, modification and reinforced granulation of various plastics.

The structure of laboratory mini plastic single screw extruder:
(1) Screw
It is a key component for the transportation and plasticization of plastics. Because of its rotation, the plastic is pushed forward to achieve the purpose of compaction, melting and mixing. The thread is composed of different functional sections to achieve better conveying, compaction, mixing, plasticizing effect and high output. The screw material is made of high-quality nitrided steel (38CrMoALA), finished by nitriding and fine grinding. It has high corrosion resistance and wear resistance and long service life.
(2) head flange joint
It is a part of the joint head and the barrel, which is heated by a heating ring to prevent the cooling of the molten plastic.
(3) Transmission system
The transmission system is to rotate the screw evenly with the necessary torque under the selected process conditions to complete the plasticization and transportation of the plastic to the screw. In order to meet the production requirements of various specifications of plastic products, the screw should have different rotation speeds. The machine adopts the variable frequency motor to directly drive the gear box through the coupling, and adopts the governor to realize the speed regulation, so that the screw speed can be smoothly steplessly regulated within the speed regulation range, and the screw speed can be directly read by the tachometer on the control panel. It can also be read directly on the governor.

Technical Parameter


Screw Diameter L/D Ratio Driving Power Center Height Output
SJ-25/25 35mm 25:1


3kw 1000mm 12kg/hour
SJ-45/25/28 45mm 11kw 1000mm 30 kg/hour
SJ-50/25/28 50mm 15kw 1000mm 40 kg/hour
SJ-65/25/28 65mm 22kw 1000mm 60 kg/hour
SJ-75/25/28 75mm 45kw 1000mm 120 kg/hour
SJ-90/25/28 90mm 55kw 1000mm 120 kg/hour
SJ-110/25/28 110mm 75kw 1000mm 140kg/hour
SJ-120/25/28 120mm 90kw 1000mm 240kg/hour
SJ-150/25/28 150mm 132kw 1000mm 350kg/hour

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