Extrusion Processing Systems

Bulk Heat Exchangers for Thermal Control

Bulk heat exchangers play a critical role in extrusion and compounding processes by ensuring precise temperature control of bulk materials such as pellets, powders, and granules. These systems are designed to heat or cool materials efficiently before or after extrusion, improving process stability, product quality, and energy efficiency.

Enge Plas provides complete extrusion processing systems tailored for plastics manufacturing and industrial applications. Our solutions are engineered to deliver consistent product quality, optimized throughput, and seamless integration across the entire production line. From raw material handling to compounding, thermal control, and downstream processing, we offer fully integrated systems designed to enhance efficiency and operational reliability.

Bulk heat exchangers can be integrated into extrusion lines to:

Preheat raw materials before processing
Cool granules after extrusion
Stabilize temperature before downstream handling

This improves overall system efficiency, reduces energy consumption, and enhances product quality.

Gravity Heat Exchanger

Designed for free-flowing coarse powders and pellets, the Gravity heat exchanger uses gravitational forces to move bulk material from top to bottom through vertical tubes.
The tubes are surrounded by a heating or cooling medium on the shell side, allowing the material to be efficiently heated or cooled as it flows. This solution is ideal for simple, vertical installations with sufficient height.

Inline Gravity Heat Exchanger

When vertical installation is not possible due to building height constraints, the Inline Gravity heat exchanger is an excellent alternative.
- Suitable for free-flowing coarse powders and pellets
- Can be integrated into a pneumatic dilute-phase conveying system
- Positioning is flexible, making it attractive for retrofits, even during ongoing production
- Provides efficient heating or cooling without major process disruptions

Inline Heat Exchanger

Specifically developed for fine powders, the Inline heat exchanger is installed directly into a vertical pneumatic conveying line.
- Pneumatically conveyed powder is fed from below with the conveying gas
- Offers precise thermal control for powders that require careful handling
- Ensures consistent heating or cooling without affecting the conveying process

✅ Efficient heating or cooling of powders and pellets

✅ Flexible installation: vertical, inline, or retrofitted

✅ Minimal impact on existing processes

✅ Improved material handling and product quality

✅ Ideal for extrusion, compounding, and bulk material handling systems

✅ Compact design without moving parts

✅ Controlled discharge at outlet with metering devices (e.g., rotary valve)

✅ Patented inlet design for optimal material flow

✅ Ideally suited for heat-sensitive materials

✅ Ability to remove trace volatile compounds

✅ Low abrasion for bulk solid particles

✅ Eliminates the need for electrical and/or natural gas for blowers, rotors, or other equipment operation

Dust Collectors for Extrusion & Bulk Material Handling

The purity of bulk materials is one of the most critical factors in achieving high-quality end products. Contamination, residual dust, or material degradation during conveying can directly impact production efficiency, product consistency, and compliance with industry standards.

At Enge Plas, we provide comprehensive solutions for bulk material handling, dust control, and sieving, designed to maintain the integrity of your materials throughout the entire production process. Our expertise combines decades of process experience with globally leading bulk material handling technology, ensuring that every system is optimized for both performance and quality.

In addition, our hydraulic conveying systems have been proven to provide superior results, maintaining material quality even under demanding conditions. These systems are ideal for heat-sensitive, fine, or fragile powders and ensure minimal product degradation during transfer.

To further enhance product quality, Enge Plas offers a wide range of sieves, separators, and dust collection equipment. These systems efficiently remove:

Residual dust particles
Fines and streamers
Contaminants that may affect product consistency

By integrating these solutions directly into your extrusion and compounding lines, we ensure that bulk materials remain clean, uncontaminated, and ready for high-quality processing.

DIVERTING COUNTER-FLOW ELUTRIATOR

Proven efficiency with continuous optimization over the years
Latest generation includes two cleaning stages for enhanced separation performance
Suitable for most pellets, optimized for high throughput and low energy consumption
Can be fed pneumatically or gravimetrically from a hopper
Capable of achieving throughput capacities of 120 t/h and above, making it ideal for large-scale production lines
Reduces dust emission and improves overall product quality

GRAVITY ROTATION SEPARATOR

Designed for capacities up to 100 t/h, perfect for soft and brittle granular products
Provides efficient separation of dust and streamers
Cleaning can take place in 1 or 3 stages depending on requirements
Flexible installation options: base, silo top, or between silo and tank car
Available as a compact, transportable unit for versatile plant layouts
Ensures consistent product purity while minimizing dust contamination

‍

DRUM SIEVE

Fed gravimetrically, ideal for precise dust separation
Efficiently separates streamers and streamer conglomerates
Can be used as a standalone unit or integrated into a dust cleaning system
Compact, service-friendly design with fully automatic sieve cleaning
Improves material handling efficiency and reduces maintenance downtime

‍LABORATORY ANALYZING DEVICE TO DETERMINE DUST CONTENT

Measures dust content in plastic pellets according to FEM 2482 standard
Compact desktop configuration saves space and working time
Easy to operate with quick setup for fast and accurate testing
Helps maintain quality control standards for extrusion and bulk handling

✅ Proven efficiency over the years, continuously optimized for high-performance dust separation and bulk material handling

✅ Latest generation with two cleaning stages, improving separating efficiency for pellets, powders, and granular materials

✅ Flexible installation options – can be installed on the base, silo top, or between the silo and tank car; also available as a compact, transportable dust collector unit

✅ Excellent accessibility and service-friendly design, ensuring easy maintenance and long-term reliability in industrial dust control systems

Interconnecting tubing and fittings – for smooth, leak-free connection between dust collector components
Filter head for the cyclone – ensures maximum dust separation efficiency
Sound dampening – reduces operational noise for a safer and quieter workplace
Blower silencers – minimizes blower noise while maintaining airflow performance

Mechanical Purging Agent

Enge Plas provides a high-performance mechanical purging agent designed for the safe, efficient, and thorough cleaning of plastics processing equipment, including extruders, screws, barrels, and dies. This granular purging material is blended with a small amount of the polymer in use and fed into a starved screw or barrel, where it is processed at normal operating temperatures and screw speeds. The material softens slightly without melting, loosening carbonized, degraded, or residual resin, and ensures the complete removal of leftover polymer from the system. By using this method, production lines can maintain consistent, high-quality extrusion output while protecting the integrity of the equipment.

The Enge Plas mechanical purging agent minimizes downtime, prevents cross-contamination between color or material changes, and is compatible with standard, heat-sensitive, and high-performance polymers. It is ideal for routine cleaning, rapid changeovers, and bulk material handling systems, helping to optimize equipment performance, production efficiency, and overall product quality. Integrating this purging agent into your extrusion process ensures that your machinery remains clean, reliable, and ready for uninterrupted operation.

VARIOUS GRADES OF MECHANICAL PURGING AGENTS

Our mechanical purging agents are designed for a wide range of plastics processing applications, ensuring safe, effective, and efficient equipment cleaning:

- Injection Moulding: Suitable for standard injection moulding operations (except where openings are smaller than 1.5 mm).
- Extrusion & Blow Moulding: Ideal for extrusion, blow moulding, and injection moulding with small openings below 1.5 mm.
- Hot Runner Systems: Compatible with hot runner systems requiring a minimum clearance of 0.75 mm.
- Unblended Use (100%): In extrusion and compounding processes, used at 100% for maximum effectiveness. Softens material without melting, providing a gentle scrubbing action to the screw and barrel. Removes carbonized build-up efficiently without scratching or wearing equipment.

✅ Efficient Color and Polymer Cleaning – Quickly removes residual color or polymer from your equipment, ensuring smooth production transitions.

✅ Eliminates Carbon Build-Up – Effectively removes carbon deposits and black specks, maintaining optimal equipment performance.

✅ Supports Preventative Maintenance – Ideal for regular maintenance to extend the life of screws and barrels.

✅ Reduces Manual Cleaning Needs – Prepares equipment for manual cleaning or can replace it entirely in many cases.

✅ Rapid Purging for Material Changes – Particularly useful when changing colors or polymers, or when screw and barrel are carbonized, minimizing machine downtime and reducing waste of expensive materials.

✅ Versatile Application – Suitable for injection moulding, extrusion, and blow moulding processes.

✅ Cost-Effective – Only a small amount is needed, typically at a 20% addition rate to the polymer, making it an economical solution for ongoing production.

Extruders

Enge Plas delivers total solutions for extrusion processing, covering every step from raw material feeding to the entire downstream periphery. Our systems handle throughput rates ranging from 1 kg/h to 100 t/h, ensuring flexibility for a wide variety of production scales.

The quality of the end product is crucial, especially in complex processes such as handling viscous or challenging materials. From raw material handling to conveying, melting, dispersing, homogenising, devolatilisation, pressure build-up, filtering, and pelletising, our expertise ensures that every process step is precisely adapted.

By leveraging our extensive know-how, we guarantee maximum throughput rates while maintaining the highest levels of efficiency, economy, and product quality for all our extrusion machines and plants.

✅ ZSK Series – The pinnacle of twin-screw extrusion technology, combining over 50 years of process and processing expertise. This high-end, high-tech series is ideal for demanding compounding and extrusion tasks. Key features:

Maximum Torque & Speed: Ensures fast and efficient processing even with highly viscous materials.
High Free Volume: Allows optimal material flow for complex processes.
Versatile Applications: Perfect for specialty polymers, masterbatches, and sensitive formulations where precision is critical.
Proven Reliability: Built for continuous, high-performance operation, maintaining product quality at every stage.

✅ STS MC11 Series – Combines German process expertise with cost-effective serial production in China, offering an excellent price-performance ratio without compromising quality. Key features:

Standardized Design: Ensures ease of operation and consistent results.
CE Certified: Complies with international safety and quality standards.
Efficient Production: Suitable for medium-scale extrusion applications with reliable throughput.
Flexible Material Handling: Capable of processing a wide range of polymers for diverse industrial applications.

✅ CTE PLUS Series – A new twin-screw compounding system offering an attractive balance of performance and cost. Ideal for economical production without sacrificing quality. Key features:

Precise Manufacturing: Guarantees consistent output and high-quality products.
Wide Application Range: Handles various polymers, additives, and fillers efficiently.
Optimized for Economy: Reduces operational costs while maintaining high throughput.
User-Friendly Design: Simplifies setup, maintenance, and operation for smooth production workflows.

✅ Greatly Improved Productivity – Designed to maximize throughput while maintaining consistent product quality.

✅ Increased Energy Efficiency – Reduced specific energy input lowers operational costs and environmental impact.

✅ Flexible, Wide Area of Applications – Handles a variety of polymers, masterbatches, and additives for diverse industrial uses.

✅ Precise Temperature Control – Ensures stable processing conditions for high-quality output.

✅ Proven High ZSK Safety – New designs and developments provide reliable, safe operation in all production scenarios.

✅ Comprehensive Process Engineering Support – Expert guidance ensures optimal process configuration and performance.

✅ Efficient Project Execution – Professional planning and implementation guarantee maximum security in costs, schedule, and product quality.

✅ Easy Transport – Engineered for smooth road and sea transport, reducing logistical challenges.

✅ Complete System Service – Full support for the entire compounding system from a single trusted supplier.

✅ Easy Installation & Integration – Advanced software control system and optimized configuration enable fast setup and seamless operation.

Quick Release Clamps – Easy-to-use clamps at the feed hopper, degassing dome, and atmospheric venting, enabling fast assembly, cleaning, and maintenance.
Diverter Valves – Allow precise control of material flow, enhancing process flexibility and efficiency.
Wear & Corrosion Resistant Screw Elements – Extend screw life and maintain consistent product quality even with abrasive or corrosive materials.
Barrel with Oval Liner – Improves material flow, reduces wear, and enhances overall extrusion performance.