EXTRUTEX EXCT-75 Co-Rotating Twin-Screw Extruder

75 mm Modular Co-Rotating Twin-Screw Extruder with Clamshell Barrel

The EXTRUTEX EXCT-75 is a high-performance co-rotating twin-screw extruder engineered for medium and high-capacity polymer compounding, masterbatch production, engineering plastics, recycling, filler incorporation and advanced thermoplastic processing. Built around EXTRUTEX’s modular extrusion philosophy, the EXCT-75 combines powerful processing capability with exceptional flexibility, allowing manufacturers to configure the machine for a wide variety of materials and production requirements.

Featuring a 75 mm screw diameter, 32–48 L/D configurations, 300–500 rpm screw speed, 90 or 110 kW drive options, and an output capacity of approximately 300–700 kg/hour, the EXCT-75 is designed for continuous industrial production while maintaining the adaptability required for specialized compounds and changing formulations.

One of the defining features of the EXCT-75 is its clamshell barrel design, which allows the barrel to be opened within minutes for rapid cleaning, inspection, maintenance and screw configuration changes. Combined with independently controlled barrel temperature zones and a modular screw system, the EXCT-75 offers an efficient solution for manufacturers seeking consistent product quality, reduced downtime and optimized processing performance.

EXCT-75 Technical Specifications

Actual production capacity depends on polymer type, formulation, screw configuration, feeding system, processing temperature, residence time and downstream equipment.

High-Capacity 75 mm Processing Platform

The 75 mm screw diameter provides a substantial increase in processing volume compared with smaller twin-screw models, making the EXCT-75 an excellent choice for manufacturers seeking higher production efficiency without sacrificing processing flexibility.

The co-rotating twin-screw configuration allows the machine to perform multiple processing functions simultaneously, including conveying, melting, kneading, intensive mixing, dispersion, homogenization and pressure building.

Unlike fixed-configuration extruders, the EXCT-75 uses interchangeable screw elements and modular barrel sections, allowing engineers to tailor the internal processing profile to each formulation. Whether processing virgin polymers, mineral-filled compounds, engineering plastics or recycled materials, the screw arrangement can be optimized for the desired balance of throughput, mixing intensity and residence time.

Production Capacity of 300–700 kg/hour

The EXCT-75 is designed to deliver a nominal production range of 300–700 kg/hour, making it suitable for continuous industrial manufacturing and high-volume compounding operations.

The actual output depends on several processing variables, including:

• Polymer type

• Melt viscosity

• Bulk density

• Filler concentration

• Additive loading

• Moisture content

• Screw configuration

• Screw speed

• Barrel temperature profile

• Feeding accuracy

• Vacuum degassing

• Downstream pressure

This wide operating range allows manufacturers to process both high-output commodity compounds and more demanding specialty formulations on the same production platform.

300–500 RPM Screw Speed

The EXCT-75 operates within a screw-speed range of approximately 300–500 rpm, providing excellent flexibility for different processing conditions.

Higher operating speeds can increase mixing intensity and mechanical energy input, making them suitable for demanding dispersion applications. Lower speeds can be selected when longer residence time or gentler processing is required.

The combination of adjustable screw speed and modular screw geometry enables engineers to optimize:

• Throughput

• Mixing intensity

• Residence time

• Melt temperature

• Dispersion quality

• Pressure stability

32–48 L/D Configurations

The EXCT-75 is available with 32–48 L/D configurations, allowing manufacturers to select the processing length most appropriate for their application.

Shorter configurations can be suitable for relatively simple compounding operations, while longer configurations provide additional processing zones for more complex formulations requiring multiple sequential operations.

A typical extended processing sequence may include:

Metering → Feeding → Conveying → Melting → Kneading → Dispersion → Homogenization → Degassing → Pressure Building → Filtration → Pelletizing

This modular arrangement allows each process stage to be optimized independently.

Clamshell Barrel Design

One of the most valuable features of the EXCT-75 is its clamshell barrel system.

Unlike conventional closed-barrel extruders, the hinged barrel can be opened quickly, providing direct access to the screws and internal processing chamber.

This significantly simplifies:

• Product changeovers

• Cleaning

• Maintenance

• Screw inspection

• Screw-element replacement

• Removal of residual material

• Troubleshooting

• Process optimization

• Research and development

For manufacturers producing multiple formulations, rapid barrel access helps reduce downtime and improves operational efficiency.

Modular Barrel Construction

The EXCT-75 uses a modular barrel architecture that allows different barrel sections to be configured according to the required processing sequence.

Individual barrel sections may be dedicated to specific functions such as:

• Feeding

• Conveying

• Melting

• Intensive mixing

• Kneading

• Side feeding

• Additive incorporation

• Degassing

• Vacuum devolatilization

• Homogenization

• Pressure building

• Discharge

This modular design allows the extruder to be customized for different materials rather than forcing every formulation through one fixed processing profile.

Independent Temperature Control

Each barrel section can be controlled independently, allowing engineers to establish an optimized temperature profile along the extrusion process.

Different stages of polymer processing often require different thermal conditions.

For example:

• Feeding zones may require controlled temperatures to prevent bridging.

• Melting zones require sufficient heat for plasticization.

• Mixing zones must maintain appropriate melt viscosity.

• Degassing zones benefit from carefully controlled temperatures for efficient volatile removal.

• Downstream sections stabilize the melt before discharge.

Electric heating and cooling systems provide precise thermal management throughout the barrel.

This improves control over:

• Melt quality

• Viscosity

• Mixing performance

• Residence time

• Thermal history

• Product consistency

Modular Screw and Kneading System

The EXCT-75 features a highly configurable screw system consisting of interchangeable conveying, mixing and kneading elements.

Engineers can configure dedicated processing zones for different formulations.

Conveying Elements

Transport raw materials efficiently while maintaining stable material flow.

Melting Elements

Promote controlled polymer plasticization.

Kneading Blocks

Increase mechanical energy for intensive mixing and filler dispersion.

Mixing Elements

Provide both distributive and dispersive mixing.

Homogenizing Elements

Improve melt consistency before discharge.

Degassing Sections

Support moisture and volatile removal.

Pressure-Building Elements

Generate the pressure required for filtration and downstream processing.

The screw configuration can therefore be optimized according to the specific processing objectives.

Complete Compounding Process

The EXCT-75 can be configured to perform every major stage of modern polymer compounding.

1. Metering and Feeding

Accurate feeding establishes formulation consistency.

The system can process:

• Polymer pellets

• Powders

• Mineral fillers

• Pigments

• Additives

• Glass fibers

• Wood fibers

• Recycled materials

Multiple feeding points can be incorporated where necessary.

2. Conveying

The initial screw sections transport materials through the barrel while maintaining stable filling conditions.

3. Melting

Controlled thermal and mechanical energy convert solid polymers into a homogeneous melt.

4. Dispersion and Mixing

The twin-screw system provides excellent mixing performance for:

• Masterbatch

• Polymer blends

• Filled compounds

• Reinforced materials

• Additive concentrates

5. Degassing

Vacuum degassing can remove:

• Moisture

• Air

• Residual monomers

• Solvents

• Volatile compounds

This is particularly valuable for recycled materials.

6. Homogenization

Downstream screw elements stabilize the melt before filtration or discharge.

7. Melt Filtration

Optional filtration systems can remove contaminants before pelletizing.

8. Pelletizing

The EXCT-75 can integrate with:

• Strand pelletizers

• Water-ring pelletizers

• Underwater pelletizers

• Sheet dies

• Profile dies

• Custom downstream equipment

Engineering Plastics Processing

The EXCT-75 is well suited for engineering thermoplastics requiring precise temperature control and intensive mixing.

Applications include:

• PA compounds

• PC compounds

• ABS compounds

• PET compounds

• PBT compounds

• Modified engineering plastics

The modular screw design allows the processing profile to be adapted for different engineering polymers.

Masterbatch Production

The EXCT-75 is an effective platform for producing:

• Color masterbatch

• Black masterbatch

• White masterbatch

• Additive masterbatch

• Filler masterbatch

The intensive mixing capability helps achieve uniform pigment and additive dispersion while maintaining consistent pellet quality.

Filled Polymer Compounds

The machine is suitable for processing formulations containing:

• Calcium carbonate

• Talc

• Barium sulfate

• Glass fiber

• Mineral fillers

• Wood fiber

• Specialty fillers

The modular screw configuration allows mixing intensity to be adjusted according to filler loading and dispersion requirements.

Recycling and Re-Compounding

The EXCT-75 is also designed for modern recycling applications.

Recycled polymers often require additional processing stages to remove moisture and contaminants while restoring material consistency.

A typical recycling configuration may include:

• Feeding

• Melting

• Mixing

• Vacuum degassing

• Filtration

• Homogenization

• Pelletizing

The modular barrel allows these stages to be arranged according to the recycled material.

R&D and Process Development

Although designed for industrial production, the EXCT-75 remains highly valuable for process development.

Engineers can evaluate:

• Screw configurations

• Barrel arrangements

• Temperature profiles

• Screw speed

• Feeding positions

• Mixing intensity

• Degassing performance

• Throughput optimization

The clamshell barrel makes these adjustments considerably more practical.

Wear-Resistant Construction

The internal components of the EXCT-75 are available with material options suited to demanding industrial environments.

Standard configurations utilize nitrided steel components, while more demanding applications can incorporate enhanced wear-resistant and corrosion-resistant materials.

This is especially important when processing:

• Glass fiber compounds

• Calcium carbonate compounds

• Mineral-filled polymers

• Recycled materials

• High-filler formulations

Proper material selection extends component service life and helps maintain consistent processing performance.

Main Advantages of EXCT-75

High-Capacity 75 mm Platform

Designed for industrial compounding with outputs up to 700 kg/hour.

Modular Screw System

Flexible screw configurations for different formulations.

Clamshell Barrel

Fast access for cleaning, maintenance and screw changes.

Independent Temperature Zones

Precise thermal control throughout the extrusion process.

32–48 L/D Options

Configurable processing length for different applications.

300–500 RPM Operation

Flexible control of throughput and mixing intensity.

Wear-Resistant Components

Suitable for abrasive fillers and demanding formulations.

Wide Application Range

Supports masterbatch, engineering plastics, filled compounds, recycling and specialty polymers.

Applications

The EXTRUTEX EXCT-75 is suitable for:

• Polymer Compounding

• Color Masterbatch

• Black Masterbatch

• White Masterbatch

• Additive Masterbatch

• Filler Masterbatch

• Calcium Carbonate Compounds

• Talc Compounds

• Glass Fiber Compounds

• Engineering Plastics

• Polymer Blending

• Recycled Polymer Compounds

• Recycling and Re-Compounding

• Specialty Thermoplastics

• Industrial Continuous Production

EXTRUTEX EXCT-75

The EXTRUTEX EXCT-75 represents a powerful combination of high-capacity production, modular processing technology and practical maintenance accessibility.

With a 75 mm screw diameter, 300–500 rpm operating range, 32–48 L/D configurations, 90 or 110 kW drive options, and a production capacity of approximately 300–700 kg/hour, the EXCT-75 is engineered to meet the demands of modern polymer compounding.

Its configurable screw architecture allows manufacturers to tailor the extrusion process to different formulations, while the clamshell barrel dramatically improves cleaning, maintenance and product changeover.

From masterbatch production and engineering plastics to filled compounds, recycling and specialty materials, the EXCT-75 provides a reliable and flexible platform for continuous industrial manufacturing.

EXTRUTEX EXCT-75 — High-Capacity Modular Twin-Screw Technology for Advanced Polymer Compounding.