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.
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.
Thermoset screw
The thermoset screw works without compression, so the mate- rial can be heated without any friction.
LSR screw
The LSR screw works like a dosing screw, but has a special geometry.
PVC screw
The PVC screw can be supplied with soft or rigid PVC geometry.
Dosing screw
The dosing screw is used to transport various materials.
Elastomer screw
The elastomer screw can be used for injection moulding as well as extrusion.
Extrusion screw
The extrusion screw is made with different geometries suitable for the customers application.
Foaming screw
The foaming screw is used for optimum processing in the gas injection process. The intermediate valve, as well as the ejection zone can be designed according to the application.
Concave screw
The concave screw is used for conveying free-flowing powders and fine granules. In addition, it can also be used for metering more difficult materials, such as for dyes, sticky, bridging or shooting powders, fibers and glass fibers.
Individual screw
Screws as individual as your application. In cooperation with you, we design optimized screws for your process.
