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PVC is sensitive to processing temperature, residence time and shear. Unstable processing can cause poor plasticization, discoloration, material degradation or irregular extrusion output.
The ANDA conical twin screw PVC extruder is engineered to control these variables throughout the feeding and plasticizing process. The screws transport the PVC compound through the barrel while applying controlled compression and mixing.
The conical geometry provides a larger feeding area and a gradually reduced screw diameter toward the discharge section. This structure helps maintain stable material intake and build the pressure required for continuous extrusion.
The extruder can be configured according to:
PVC formulation
Filler content
Required output
Die structure
Melt pressure
Finished product dimensions
Downstream line speed
Electrical requirements
Model | Screw Diameter(mm) | Main Motor(kw) | Output(kg/h) |
SJSZ51 | 51/105 | 18.5/22 | 80/110 |
SJSZ55 | 55/110 | 22/30 | 120/150 |
SJSZ65 | 65/132 | 37/45 | 280/350 |
SJSZ80 | 80/156 | 55/77 | 380/450 |
SJSZ92 | 92/188 | 110/132 | 700/850 |
Stable Powder Feeding
The large feeding section of the conical screws supports stable intake of prepared PVC dry blends and compounds. Consistent feeding helps reduce output fluctuation.
Uniform PVC Plasticization
The screw geometry controls conveying, compression and mixing throughout the barrel. Uniform plasticization helps improve melt consistency before the material enters the die.
Controlled Melt Pressure
The gradually reduced screw diameter helps develop stable pressure toward the discharge section. This supports continuous material flow through the die.
Accurate Temperature Adjustment
Independent heating zones allow different temperatures to be set along the barrel. This is important because PVC has a relatively narrow processing window.
Adjustable Production Output
The feeding rate and screw speed can be adjusted within the operating range of the selected model. This allows the extruder to match different dies and downstream systems.
Multiple Model Options
Five SJSZ models are available for different production capacities. Customers can select the machine according to actual material and output requirements.
The main motor provides stable power to the extrusion system. Controlled startup helps reduce current impact and voltage fluctuation.
Siemens motors can be configured according to the selected machine model and project requirements.
The twin screws are designed for the controlled conveying, compression and plasticization of PVC compounds.
The conical structure provides strong material intake at the feeding section and stable pressure near the discharge section. Screw geometry can be selected according to the material formulation and extrusion requirements.
The screw and barrel can be manufactured from 38CrMoAl to provide the strength and wear resistance required for continuous PVC processing.
Material, surface treatment and wear-resistant configuration should be selected according to filler content, operating time and formulation characteristics.
The gearbox transfers torque from the motor to the twin screws. A stable transmission system supports smooth screw rotation under continuous operating loads.
A JAC gearbox can be configured according to the required torque and extruder model.
Independent heating zones maintain the required temperature profile along the barrel.
PID control automatically responds to temperature variation and helps reduce:
Incomplete PVC plasticization
Excessive melt temperature
Material discoloration
Thermal degradation
Unstable extrusion pressure
Omron temperature controllers can be selected according to the electrical configuration.
Variable-frequency control allows the operator to adjust motor and screw speed according to the material flow, die resistance and required output.
ABB inverters can be configured to provide stable speed regulation and overload protection.
The control cabinet manages the motor, heaters, temperature zones and safety circuits.
Schneider contactors and other electrical components can be configured according to the project specification. PLC touchscreen control is also available for centralized parameter setting and operating-status monitoring.
Component brands should be confirmed in the final technical proposal.
What is a conical twin screw PVC extruder?
A conical twin screw PVC extruder uses two tapered screws to feed, compress, plasticize and discharge PVC compounds. The screw diameter gradually decreases toward the discharge section, helping the machine maintain stable feeding and melt pressure.
Can the extruder process PVC powder directly?
The machine is designed to process prepared PVC dry blends and compounds. PVC resin, stabilizers, fillers and processing additives must be mixed uniformly before feeding.
How do I choose the correct SJSZ model?
Model selection depends on the PVC formulation, required output, filler content, die resistance and downstream capacity. These conditions should be evaluated together before choosing the screw size and motor power.
What affects the actual extrusion output?
Actual output is affected by the material formulation, bulk density, screw speed, temperature settings, die resistance and downstream line speed. The values in the specification table are reference ranges.
Why is temperature control important for PVC?
PVC is sensitive to excessive heat and long residence times. Accurate temperature control helps achieve proper plasticization while reducing discoloration and thermal degradation.
Is PLC touchscreen control available?
Yes. PLC touchscreen control can be configured for centralized parameter setting, temperature monitoring and operating-status display.
Can the electrical configuration be customized?
Yes. Motor, inverter, controller and electrical components can be selected according to the required voltage, frequency, automation level and project specification.
Can the screw and barrel be customized?
The screw geometry and material configuration can be selected according to the PVC formulation, filler content and required output. Final specifications should be confirmed with the technical team.