Company Profile

Confex Technology have since 1993 specialised in Continuous Rotary Extrusion systems.

Confex Technology Ltd was formed in 1993 by David Godwin, who prior to forming Confex was involved in the start up of Holton Machinery including design, development and sales of CRE machines.

Together with other ex-Holton Machinery engineers now employed by Confex, we have supplied many Continuous Rotary Extrusion Lines both as Confex and together with our partners.

Confex Continuous Rotary Extrusion

In 2008 we took the decision to buy our own purpose built offices and warehouse based in Poole, Dorset, UK. Here we hold a large stock of spares, tooling and dies, carry out refurbishment and assembly of items such as extrusion shoes and head frame assemblies.

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The Process - Continuous Rotary Extrusion

The United Kingdom Atomic Energy Authority (UKAEA) invented the continuous extrusion system in 1971 whilst looking for a method of producing seamless tubes for the storage of spent nuclear fuel rods.

Confex Process

In the event the process was not used for that application but other commercial possibilities became apparent and over the past 40+ years the process has been developed and used for a variety of products. Today it is estimated that there are over 800 installations world-wide.

The Confex process is a Continuous Rotary Extrusion (CRE) system. It is used for the continuous production of aluminium or copper extrusions. The process (figures 1 and 2) uses a rotating grooved steel wheel which is closed over about a quarter of its circumference by fixed sealing segments to form an extrusion chamber.

Confex Process

An abutment penetrating into it blocks the groove. These segments are housed in an extrusion shoe that is restrained within the Confex machine by clamps designed to withstand the pressures of extrusion.

Metal in the form of rod enters the groove at the extrusion chamber entrance and is carried around until it impinges on the abutment. The forward motion of the wheel groove forcing the metal onto the abutment creates friction. This causes the metal to increase in temperature until it reaches a plastic state and due to the rotational pressure is forced to escape through the die.