Conical Twin Screw Extruder for PVC Profile/Pipe Production

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Model SJZ series twin conical screws extruder is a kind of special equipment for extruding of PVC powder. With different sorts of molds and auxiliary machines, it can produce all sorts of PVC plastic pipe material, profiled material, plate material, sliced material, bar material and granulation.

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Main Description

Conical twin-screw extruders are widely used in polymer processing due to their high shear force, superior mixing capability, and excellent degassing performance, making them particularly suitable for heat-sensitive materials like PVC. Below is a detailed breakdown of their key applications and real-world use cases.

1. PVC Product Processing

① PVC Window & Door Profiles

② PVC Pipes (Drainage Pipes, Electrical Conduits)

③ PVC Sheets/Corrugated Boards

2. Wood-Plastic Composites (WPC)

① WPC Flooring/Wall Panels

② WPC Outdoor Products

3. Recycled Plastic Processing

① PVC Recycled Pelletizing

② Other Recycled Plastics

Main Technical Parameter

Model	SJZ45/90	SJZ51/105	SJZ55/110	SJZ65/132	SJZ80/156	SJZ92/188
Power of drive motor (kw)	15	18.5	22	37	55	110
Screw diameter (mm)	Φ45/Φ90	Φ51/Φ105	Φ55/Φ110	Φ65/Φ132	Φ80/Φ156	Φ92/Φ188
No.of screw	2	2	2	2	2	2
Rotational speed	45	40	38	38	37	36
Torsional moment of screw (Nm)	3148	6000	7000	10000	14000	32000
Capacity(kg/h)	70	100	150	250	400	750
Central height	1000	1000	1000	1000	1100	1200
Dimentions	3360x1290x2127	3360x1290x2127	3620x1050x2157	3715x1520x2450	4750x1550x2460	67250x1550x2814

FAQ

Why does a twin scratch extractor mix better than a single scratch extractor?

Strong shearing force and extrusion force: the twin-screw extruder has two screws rotating synchronously, and the high efficient shearing force and extrusion force formed between them help to mix the raw materials better. The synergistic effect of the twin-screw can mix the raw materials of different components more fully in the extrusion process.

Larger surface area: the twin-screw extruder has a larger surface area than the single-screw extruder because the space between the twin-screw allows more feed to pass through. This means that more raw materials can come into contact with the barrel wall, increasing the mixing opportunity and helping to improve the mixing uniformity.

Adjustable pitch and screw speed: twin-screw extruder usually has adjustable pitch and screw speed, and operators can adjust these parameters according to production needs. By flexible adjustment of screw pitch and screw speed, it can better adapt to different materials and production requirements and achieve more accurate mixing effect.

Parallel screw motion: the screw of twin-screw extruder is usually in parallel motion, which helps to reduce the shear heat generated in the extrusion process, so as to better maintain the temperature stability of raw materials. Stable temperature helps prevent uneven melting of raw materials in the mixing process and improves the mixing consistency.

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