首页>
外国专利>
Extrusion die for hollow member, mandrel for said extrusion die and male die for said extrusion die
Extrusion die for hollow member, mandrel for said extrusion die and male die for said extrusion die
展开▼
机译:中空构件的挤压模,所述挤压模的心轴和所述挤压模的凸模
展开▼
页面导航
摘要
著录项
相似文献
摘要
An extrusion die for a hollow member includes: a male die for defining a plurality of hollow portions of the hollow member, the male die including an annular base portion and a bridge portion bridging the annular base portion; a female die for defining an outer peripheral portion of the hollow member, the female die being fitted in the annular base portion; and a mandrel having a plurality of forming protrusions, the mandrel being inserted and held in a mandrel holding slit formed in a center of the bridge portion in a fore-and-aft direction. The mandrel includes a mandrel main portion divided into a plurality of divided members and a plurality of rigid pins each arranged in a fore-and-aft direction of the mandrel main portion, and wherein the rigid pins are pinched by and between the divided members of the mandrel main portion with tip portions of the rigid pins protruding from an front end of the mandrel main portion, whereby the tip portions constitute the forming protrusions.
展开▼