Moulding method and its application to the manufacture of tubes or profiled sections

摘要

The subject of the present invention is a method for moulding a hollow body, by pressurising and heating a pulverulent or flakey (laminated) material. According to the invention, use is made, for the inner element or core of the mould, of a material whose coefficient of expansion is higher than that of the material constituting the outer element of this mould. <IMAGE>