We manufacture screws as individual as your plastics. They are performance optimised, highly resistant to wear and corrosion-proof. Our screw production can meet your requirements from Ø 12 – 200 mm, up to a length of 5000 mm. In order to minimise friction, the manufacture of screws for plastic processing machines sets a high standard on the production process as far as finishing precision and surface consistency is concerned.

The screw has the task of drawing in the granular plastic, to continously convey, to compress and to perfectly homogenise it in the output area. Groche screws have an exact geometry, which is suited to the relevant demands and areas of the application.

Ø 12 – 200 mm

Length up to 5000 mm

High wear resistant

Corrosion resistant

Individual geometries

Optimised coating

Screws

Our classic: 3-zone standard screw

The standard screw has proven successful in processing most plastics. We design optimum geometries for specialised applications.

3-zone screw with diamond mixing element

This mixing screw ensures homogenous mixing of the molten material when using Masterbatch or liquid paints.

3-zone screw with spiral mixing element

The spiral mixing element works as barrier. It supports blending and homogenising of the molten material. Performance can be increased up to 10 %.

Double flight screw

The double flight screw can be used for processing the most plastics. Performance can be increased up to 15 %.

Barrier screw with diamond mixing element

The barrier screw, combined with a diamond mixing element, homogenises and blends the molten material with a performance increase up to 25 %.

Barrier screw with spiral mixing element

The barrier screw, combined with a mixing spiral element, ho- mogenises and blends the molten material with a performance increase up to 25 %.

Degassing screw

The degassing screw consists of two 3-zone screws fitted one behind the other. It is able to process thermoplastics that are still wet. Drying times can be decreased with this product.