Apparatus for forming the neck region on a plastics half shell

摘要

A description is given of an apparatus for forming and deep-drawing the neck region at the edge of a plastics half shell, having a deep-drawing tool (3) and a counter-pressure plate (2) which are movable in two directions relative to each other, wherein the deep-drawing tool (3) embraces a deep-drawing cavity (29) in shell-like manner and has a recess (30) in the side wall (31) at the edge (32). So that deformation of the collar at the edge of the plastics half shell and also over-heating of the plastics plate for forming the half shell are avoided, according to the invention it is provided that the counter-pressure plate (2) has at least one opening (16) in the contact face (17) facing the deep-drawing tool. (3), the opening having an adjacent receiving space (19) therebehind, in which an elastic mould part (25) which is movable into at least two positions (III) is arranged in such a way that in the first retracted position (III) it is disposed flush to the rear of the contact face (17) and in the second sealed position it projects into the recess (30) at the edge (32) of the deep-drawing tool (3).