Innovation provider

Tallinn University of Technology, Faculty of Mechanical Engineering



The milling device is used for producing milled powdered products from pre-crushed brittle plastic, recycled composite plastic or some other similar material. Milling device comprises of a fixed disk with an input hole in the centre, a rotating disk parallel to the previous disk, both of which are equipped with milling rings. Disks have flanges for attachment of milling rings arranged in such way that every next flange is placed outwards in both axial and radial directions so that between two adjacent pairs of milling rings placed, an additional input hole is formed. Produced plastic powders will be used as a secondary raw material by plastic and composite plastic industry.


The placing of milling rings permits to use in the centre (where the milling material consists of larger fractions) the rings with larger teeth and in periphery the rings with smaller teeth. Additional input holes enable to use separation in optimal way.

Innovative aspects (ecologic, social and economic)

Environmental Aspects
Recycling and recovery of plastic wastes. The milling device enables to produce powdered materials form plastic wastes with lower energy consumption.
Social Aspects
The social impacts of the inventions are related to better consumption of the resources.
Economic Aspects
Lower power consumption and milled material with homogeneous size and shape.

Application examples

Produced plastic powders can be used as a secondary raw material by plastic and composite plastic industry.


Possibilities to access to European funds.


Current stage of development

Development phase – laboratory tested

Intellectual Property Rights

Patent granted
Patents granted in Estonia. Patent owner Tallinn University of Technology.

Country of origin


Country of application



National Contact Point

Antti Roose
Tartu Ülikooli, Geograafia Osakond
Vanemuise 46
51014 Tartu

Tel: +372 737 6841
Fax: +372 7375825