用最概括的语言说,半成品的挤压(与罐或其他部件的冲压不同)是指迫使金属通过挤压模伸长,从而减小其横截面面积并改变其形状.在理论上,这种挤压如同线材拉伸那样,可以是一个完全连续的过程.迫使一根既长又粗的多股芯的金属毛坯在等速下压入某装置中,于是便有一根更细的多股芯的金属毛坯以较高的等速从该装置中送出来 In the most general terms, the extrusion of semi-finished products (unlike stamping of cans or other components) means forcing the metal to elongate through an extrusion die thereby reducing its cross-sectional area and changing its shape.In theory, this Extrusion, like wire drawing, can be a completely continuous process, forcing a metal blank with a long, thick, multi-ply core to be pressed into a device at a constant speed, so that a finer multi- The metal blank is fed from the device at a higher constant velocity