FORMATION OF FRAGILE SUBSTANCE

摘要

PURPOSE:To provide an extrusion molding method for preventing the breakage during molding and improving the lubrication property between materials, in the hot extrusion molding of an ultraquick cooling magnet. CONSTITUTION:When extrusion-molding the material 2 of a magnet, the outer case 1 of glass is put on the periphery and bottom of the material 2 and this is molded together. Accordingly, compressive force is added to the top of the material where cracks are easy to occur with small ductility, so the extrusion molding of a thin pipe can be easily carried out.