The fifth expansion for tools of expansion to hollow pieces, a tool for expansion to hollow pieces and the use of a fifth expansion

摘要

Summary "head of expansion for tools of expansion to hollow pieces,A tool for expansion to hollow pieces, and the use of a fifth expansion "the invention relates to an expansion head (1) for tools of expansion to hollow pieces,Especially for the extremes of plastic tubes and pipes connecting metal plastic, comprising a coupling cap (2), which has a flange Guide (3) directed radially inwards.And a set of expandable jaws in the form of a sector (4), each of which is received individually by a sector of the internal flange (5) overlaps the flange Guide (3),In such a way as to be radially movable on the coupling cap (2), the set of expandable jaws shaped sector (4) being movable between a closed state and an expanded state.And when the jaws are closed, the external wall (7) of the set expandable jaw (4) forming approximately the area of the surface of a cylinder.The external wall (7) of at least one expandable jaw (4) having at least one recess and / or elevated (8) which extends in the direction of the longitudinal axis of the expandable jaws (4).The present invention also relates to a tool for expansion to hollow pieces, especially at the edges of pipes made from plastic or made of metal is coated with plastic.Which comprises an expansion head (1) according to the invention,And the use of the head of the expansion according to the invention or the extension tool according to the invention to produce a predetermined leak in uncompressed state of a connectionOf the tube. 1 / 1