Rubber and plastics additives
Compatible rubber auxiliaries and plastics additives requiring dust-controlled cylindrical granulation.
Screw Extrusion Granulator
Wet Screw Extrusion Granulator
A configurable wet extrusion system for mixed and kneaded wet feed or low-softening-point materials, available as single-screw or twin-screw machines with front or side discharge. Designed and manufactured for rubber and plastics additives and food additives. Review the working principle, performance features and available configuration details below when specifying your industrial project.
- Available as single-screw and twin-screw machines with front- or side-discharge die arrangements.
- Side discharge covers typical diameters of 0.7–2.0 mm; front discharge covers 1.5–12 mm cylindrical granules.
- Wet-state extrusion improves powder handling and bulk density, with a published granule yield of at least 95% for suitable materials.
- Types
- single twin screw
- Discharge
- Front / side
- Granule diameter
- 0.7–12 mm
- Granule yield
- ≥ 95%
Product Essentials
Everything needed for a quick technical review.
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Technical Data
Technical specifications
Reference values for the model configurations shown below. Confirm material conditions, utilities and optional equipment before final selection.
| Model | Screw configuration | Screw diameter (mm) | Drive power (kW) |
|---|---|---|---|
| Model 1 | Double-screw system | 60 | 3.7 |
| Model 2 | Double-screw system | 100 | 7.5 |
| Model 3 | Double-screw system | 140 | 15 |
| Model 4 | Double-screw system | 180 | 30 |
| Model 5 | Single-screw system | 100 | 7.5 |
| Model 6 | Single-screw system | 120 | 15 |
| Model 7 | Single-screw system | 160 | 22 |
| Model 8 | Single-screw system | 180 | 30 |
Granule size, yield and throughput depend on feed formulation, moisture, binder, die geometry and operating conditions. Final selection is subject to material testing and engineering confirmation.
Applications
Wet Screw Extrusion Granulator: industrial applications
Applications include rubber and plastics additives and food additives. Confirm material properties and process conditions before selecting the equipment configuration.
Food additives
Suitable food-grade formulations subject to hygienic design, contact-material and cleaning confirmation.
Catalysts
Shaped catalyst products requiring controlled cylindrical diameter and mechanical integrity.
Agrochemicals
Compatible pesticide formulations processed under wet granulation conditions.
Dyes and pigments
Conditioned colorant powders where granulation improves handling and limits airborne dust.
Daily chemical and pharmaceutical products
Suitable formulations after product-specific extrusion, hygiene and process evaluation.
Working Principle
From feed preparation to finished product.
The process route is selected around the material and product targets.
Mixing and kneading
Powders, liquid and binder where required are mixed and kneaded to establish the moisture, cohesion and consistency needed for extrusion.
Screw conveying
The prepared wet feed enters the barrel and is transported continuously by the selected single- or twin-screw system.
Compression and forming
Progressive screw pressure compacts the material and develops a stable flow toward the die head.
Die-plate extrusion
The material passes through calibrated die openings; die-hole diameter and discharge geometry determine the nominal extrudate size.
Drying or cooling
Fresh cylindrical extrudate is stabilized by the drying or cooling process selected for the formulation.
Finished granules
Uniform cylindrical granules proceed to screening, collection or packaging.
Performance Highlights
Process performance shaped around the product.
Final performance remains dependent on feed properties and engineering confirmation.
Single- and twin-screw options
Select the single-screw or twin-screw arrangement according to feed rheology, mixing demand and extrusion resistance.
Two discharge arrangements
Side and front discharge accommodate different granule-diameter ranges and line layouts.
Adjustable granule size
Changing or modifying the die-hole diameter controls the nominal cylindrical granule diameter.
Uniform cylindrical product
Continuous die extrusion converts conditioned powder into comparatively uniform cylindrical granules.
High granule yield
The source specifies a granule yield of at least 95% under suitable material and operating conditions.
Reduced airborne dust
Wet-state granulation is stated to reduce workplace dust dispersion by more than 90% in typical applications and improves handling in subsequent drying and packaging.
Improved powder handling
Granulation reduces caking, bridging and pulsating flow, while helping limit secondary dust contamination during use.
Higher bulk density
Densified granules reduce the volume required for transportation, storage and packaging.
Reduced component segregation
Converting blended multicomponent powders into granules helps preserve formulation uniformity and improve composite-product consistency.
System Configuration
Standard process path with project-specific options.
Core equipment and auxiliary systems are selected around the process duty.
single-screw configuration
Provides continuous transport and extrusion for general wet-granulation and low-softening-point material duties.
twin-screw configuration
Uses two screws for enhanced conveying, mixing and pressure development where the formulation requires more intensive processing.
Side-discharge die
Forms typical cylindrical granule diameters from 0.7 to 2.0 mm.
Front-discharge die
Forms typical cylindrical granule diameters from 1.5 to 12 mm.
Interchangeable die plate
Changing the perforation diameter adjusts the nominal finished-granule size.
Drying or cooling interface
Transfers fresh extrudate to the downstream stabilization process required by the material.
Screening and collection
Optional classification removes off-specification particles before finished-product collection or packaging.
Selection Support
Information required for screw, die and downstream-process selection.
Share the following material and product requirements so the screw arrangement, discharge direction and finishing process can be confirmed.
Material name and formulationFeed moisture and binder detailsMaterial softening pointBulk density, flowability and extrusion behaviorRequired cylindrical granule diameterRequired granule strength and yieldTarget production capacitysingle- or twin-screw preferenceFront- or side-discharge preferenceDownstream drying, cooling and screeningContact material and cleaning requirements
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