PRODUCTION OF TOOL, TOOL AND DEVICE

摘要

PURPOSE: A method and device for manufacturing elongated slender bodies that have optimum length of service time is provided. CONSTITUTION: The method for manufacturing of a tool for chip removing machining comprising a relatively tough core connected to a relatively wear resistant periphery includes the steps of: (i) feeding a warm first plastic compound (55) having a relatively high content of metallic binder to a die for extrusion; (ii) simultaneously feeding a warm second plastic compound (56) having a relatively low content of metallic binder to a die for extrusion around the first plastic compound (55) whereby the second plastic compound (56) will abut against the first plastic compound (55) during the extrusion, thereby forming a substantially cylindrical rod (65); (iii) heating the connected compounds (55,56) as a unit to drive off a polymer contained by the compounds and to sinter the remainder to a hard blank whereafter; and (iv) possible finish machining such as grinding is made.