The original Continuous Rotary Extrusion concept was developed and patented by the United Kingdom Atomic Energy Authority, who licensed Holton Machinery to design and manufacture it for sale world-wide. The traditional extrusion process is discontinuous. It can only use one billet of metal at a time, which necessitates frequent reloading. This also results in high levels of scrap.
Frictional force limits the length of the billets.
Holton's extrusion is a continuous process in which suitable feedstock is fed into a rotating grooved extrusion wheel. The frictional grip pushes the material against a fixed abutment and the shear action generates sufficient pressure and temperature to extrude the material through a die, forming shaped profiles. In the original Conform process, profile size was limited. However, Holton's unique development of the expansion shoe means that the cross section of profiles that can be produced is increased. Holton Machinery Ltd provide fast, reliable and cost-effective solutions to industry.