Patent ID: 8003041
Filing Date: 2011-08-23
Classification: B29C,B29L

Abstract:
1. A process for the production of hollow bodies of thermoplastic material, comprising the steps of: providing a multi-part tool forming a mold cavity comprising two outer molds each having an inside wall and at least one central mold which perform an opening and closing movement relative to each other, wherein the central mold is provided with at least one component holder which can be moved out of and into a tool plane defined by the central mold, moving the central mold transversely out from between the outer molds for the purpose of equipping the at least one component holder, fitting the at least one component holder with at least one insert portion, wherein said component holder is arranged on a carrier, said carrier arranged within said central mold, moving the central mold transversely back in between the outer molds, placing the at least one insert portion against the inside wall of a first of the two outer molds by extending the at least one component holder in a direction towards the first one of the two outer molds, providing at least two preforms in web or band form of plasticized material, shaping the preforms within the tool in a two-stage procedure, wherein firstly, the preforms are respectively placed between the outer molds and the central mold, the outer molds are closed against the central mold and the preforms are applied against a contour forming part of the inside wall of each of the two outer molds by means of increased pressure and/or reduced pressure and shaped to form at least two intermediate products each having an inside wall, opening the outer molds, transversely moving out the central mold, closing the outer molds against each other, and in a second stage, joining the intermediate products forming respective parts of the hollow body together to form a finished product, and opening the outer molds for removal of the product.