Theysohn PVC Extruders and TSK Compounders

Theysohn is a German maker of twin-screw extruders for PVC pipe, profile and pellets, TSK compounders, screws and bimetallic barrels, with its plant in Salzgitter.

PVC pipe lines: CON and XTS extruders

For pipe extrusion Theysohn builds CON 50, CON 63 and CON 80 conical extruders and XTS 88, XTS 108, XTS 122 and XTS 138 parallel extruders up to 36D. Screws and barrels are wear-protected in T5000 and T8000; screws for C-PVC are fully chrome-plated. Single-strand PVC pipe spans 16–710 mm.

Parallel screws: 78–136 mm
Conical screws: 50–80 mm
Process length: 24–36D
PVC pipe: 16–710 mm

Profile lines: XTS-P and CON 40–80

The XTS-P series is designed for PVC profiles: modular barrels and screws allow 24D, 26D and 32D plasticising units. Conical CON 40, CON 50, CON 63, CON 68 and CON 80 serve as main extruder or as co-extruder in pillar version. Co-extrusion tooling reaches up to 800 kg/h per line.

Parallel screws: 78–122 mm
Conical screws: 40–80 mm
Co-extrusion: 800 kg/h
Melt pressure: 550 bar

PVC pelletising: XTS 122 and GKX head

Pellet production runs on the XTS 122 parallel extruder with 28D, 32D or 36D processing units and gravimetric dosing. The GKX hot-cut pelletising head works with 1, 2 or 4 knives, adjusted to the die plate by a threaded spindle during operation. The BigBag station handles up to 1,800 kg/h.

XTS 122: 28D to 36D
GKX: 1, 2 or 4 knives
Up to 1,800 kg/h
Rigid and flexible PVC

PVC siding lines: XTS and CON

A siding line pairs an XTS parallel extruder with a CON co-extruder: they plasticise PVC dry-blend, and the two-duct die forms a 2-layer flat board. A 3- or 4-roller embosser sets the relief, then the board is calibrated, slotted, punched and cut. Extrusion speed reaches 45 m/min.

Speed: up to 45 m/min
3- or 4-roller embosser
Single or dual strand
Parallel screws: 88–136 mm

TSK compounders: 20–250 mm screws

TSK are co-rotating twin-screw extruders with fully intermeshing, self-cleaning screw elements. Barrel and screw are modular and segmented; 4D or 6D barrel sections have internal water cooling, and an overload coupling sits between motor and gear box. It serves filled plastics and masterbatch.

Screws: 20–250 mm
Torque: 18 Nm/cm³
Speed: up to 1,200 rpm
Length: up to 80D

TSK-HV and TSK-PCE compounders

The TSK-HV with a Do/Di ratio of 1.83 offers larger free volume for light bulk weight and shear-sensitive materials. The TSK-PCE process part opens horizontally by spindle drives and the screws are removed from above, which suits battery masses, powder coatings and adhesives.

TSK-HV: 20–212 mm
TSK-HV: 13.7 Nm/cm³
TSK-PCE: 20–130 mm
TSK-PCE: up to 70D

TSKaskade Unity two-stage systems

TSKaskade Unity combines a TSK or TSK-HV compounder with a counter-rotating CON extruder: the first handles intake, plastification, filler incorporation and degassing, the second reduces melt temperature and builds pressure for the die without pulsation. It suits filled compounds and PVC recyclate.

Stage 1: TSK or TSK-HV
Stage 2: conical CON
PVC pipe: ~1,000 kg/h
Co-extrusion layer: 0.5 mm

Screws, bimetallic barrels and barrel sections

The Salzgitter plant makes screws and barrels for single and twin-screw extruders, bimetallic barrels, compounder barrel sections and screw shafts, including parts for extruders of other makes. Barrels are long-term nitrided to great depth or lined with T5000 or T8000 bimetallic liners.

Over 40,000 screws and barrels
T5000 and T8000 liners
Molybdenum flight coating
Barrel relining

Selecting a Theysohn extruder by task

PVC pipe, profile, pellet and siding lines run on counter-rotating twin-screw extruders: conical CON with 40–80 mm screws and parallel XTS with 78–136 mm screws and 24–36D process length.

Compounding of filled plastics, masterbatch and cable compounds runs on TSK with 20–250 mm screws and torque up to 18 Nm/cm³; TSK-HV suits light and shear-sensitive materials, and the opening TSK-PCE suits frequent recipe changes.

TSKaskade Unity links a TSK compounder with a CON extruder for filled compounds and rigid PVC recyclate. For its lines Theysohn also builds RKS Streamliner pipe heads, the GKX pelletising head and downstream equipment.

Screws, barrels and refurbishment

The Salzgitter plant has produced well over 40,000 screws and barrels. It makes screws and barrels for single and twin-screw extruders, bimetallic barrels with T5000 and T8000 liners, and barrel sections and screw shafts for compounders.

Worn barrels are reconditioned by a special spindle process and fitted with new bimetallic liners; customers can send screws and barrels to the factory for reconditioning or geometry optimisation.

Theysohn manufacturing

Theysohn Extrusionstechnik GmbH traces its history back to 1945. Plasticising units and TSK compounders are built in Salzgitter, Germany, while the Austrian branch develops counter-rotating extruders and pipe, profile and pelletising lines.

The plant in Pune, India, builds extruders and downstream equipment for the Indian market, and the Fort Worth sales team serves North America.

Theysohn and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Theysohn and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.