Method of fabrication of metal profile of varying wall thickness has metal blank forced through die channel which can be adjusted to vary profile wall thickness

摘要

The method of fabrication of a metal profile (10) of variable wall thickness involves forcing a metal blank (30) into a channel of a die (20) having a section corresponding to the required profile. The channel cross section is altered to vary the flow of metal as a function of the required wall thickness. The die can have two half dies slidably mounted at right angle to the channel claims include a machine for carrying out the method