Process for the production of a tubular hybrid molding and tubular hybrid molding

• Main Author: Voelkle, Dietmar
• Format: Patent
• Language: English
• Published: 29.09.2020
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PIPES; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A process produces a tubular hybrid molding made of a plastics foam element that exhibits temperature-dependent shrinkage and a fiber-plastics composite. The method includes inserting the plastics foam element, unhardened first and second fiber-plastics composite sections into a mold, where the plastics foam element has open pores at locations in contact with the fiber-plastics composite. The plastics foam element and the fiber-plastics composite sections are shaped by the mold. The mold is exposed to a first temperature to minimize the viscosity of the resin in the fiber-plastics composite. The mold is exposed to a second temperature to harden the fiber-plastics composite and to achieve mechanical fixing of the plastics foam element thereon. The mold is exposed to a third temperature to shrink the plastics foam element and cause its shape to conform to that of the mold and achieve a final shape of the said element.