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Processing of toner

With Coperion you have a partner by your side who has had years of experience in the development of extrusion plants for producing toners. As a pioneer in the development of the co-rotating, intermeshing twin screw extruder we also have extensive know-how in the processing of toners and are seen as a world market leader in this field.

Toner recipes consist of resins, pigments and additives. These components are first processed in a mixer to form a premix. The premix is fed continuously into the Coperion twin screw extruder by a feeder.

The closely intermeshing, co-rotating screw shafts of the extruder pick up the product, convey and compress it and finally melt it with the kneading elements in the plasticizing zone. The individual components of the mixture are dispersed, mixed and homogenized during and after the melting process.

The processed melt is discharged vertically downwards through a nozzle in the extruder’s last barrel without pressure. The product is cooled down and broken up in a cooler as a preparation for the following grinding.

Plant for producing toner

Plant for producing toner
Plant for producing toner with volumetric feeder, twin screw extruder, compact cooling belt and units for pre-grinding

Every one of our plants for the production of toner features smoothly interacting process steps, gentle product handling with maximum product quality and maximum efficiency. For every single component and every application we pursue a single goal with our know-how: to achieve maximum customer satisfaction.

Typical features of the Coperion twin screw extruder

Excellent dispersion quality
Very good infeed capacity
Venting possibility
Very good splitting and distributing effect
Short dwell time
Even energy introduction
Low energy consumption
Gentle product handling
No blind corners
Possibility for adding liquid components
Product discharge without pressure
Short cleaning time
Excellent wear protection
Reproducible product quality
Universal use for a wide range of products and recipes without conversions
High availability
Cost-effective operation due to high throughput rates
Processing of fine dust up to 100%
Low material requirements for recipe developments
Easy modification for future tasks
Kneading and screw elements from Coperion with high wear protection
ZSK kneading and screw elements with high wear protection
ZSK flange housing with replaceable, wear-resistant oval liner
ZSK flange housing with replaceable, wear-resistant oval liner