Patent ID: 7867420
Filing Date: 2011-01-11
Classification: B29C,B29L,B60K,Y10T

Abstract:
1. A process for the production of a container of thermoplastic material by extrusion blow molding, in which during shaping of the container within a multi-part tool the container is provided with at least one connection element which passes through the wall of the container, wherein the wall of the container is pierced in the still plasticised condition with a part of the connection element in such a way that the connection element provides a welded connection involving a flow of material with the container wall at least in partial regions, wherein the connection element is a two-part structure comprising a nipple with an insertion side and a hollow cutting element wherein said hollow cutting element is fitted removably on and surrounding said insertion side of said nipple, said hollow cutting element comprising a sleeve wherein said insertion side of said nipple upon penetration of the container wall is pushed into an opening which is provided in the wall of the blow molding tool and said insertion side of said nipple surrounded by said cutting element is not fused or covered with said thermoplastic material and wherein the diameter of the cutting element and the diameter of the opening are substantially the same.