A jumping -up section of thick bamboo is used in extrusion of large -scale steelwork

The utility model relates to a jumping -up section of thick bamboo especially relates to a jumping -up section of thick bamboo is used in extrusion of large -scale steelwork for extrusion technology field. The utility model discloses a: a jumping -up section of thick bamboo, well lining, inside lining, jumping -up section of thick bamboo inside lining top is equipped with the flange, inside liningexcircle bottom is equipped with the boss rank, be equipped with on the well lining with inside lining boss rank matched with recess. The utility model discloses fundamentally has solved behind the base blank withdrawed from a jumping -up section of thick bamboo along with the hole forming pin a difficult problem for the hole forming pin can normally withdraw from, has avoided because of cuttingoff the huge economic loss that the hole forming pin caused, has also avoided simultaneously leading to the condemned condition of blank and material returned in -process to lead to the inside liningto follow the phenomenon of