Patent ID: 7392667
Filing Date: 2008-07-01
Classification: C03B

Abstract:
1. A method for shaping a tubular object made of thermoplastic material, comprising the steps: heating an object up to its softening point; providing an inner shaping tool comprising a shaping surface, said shaping surface comprising an open-pored material having a porosity of 50 μm or less with a permeability of between 10 providing an outer shaping tool comprising an outer shaping surface, said outer shaping tool shaping surface comprising an open pored material having a porosity of 50 μm or less with a permeability of between 10 wherein said inner shaping tool shaping surface and said outer shaping tool shaping surface are positioned spaced apart and adjacent each other to hold the object therebetween; conducting a free-flowing pressurized medium through the open-pored material towards the surface of the object to be shaped; introducing the inner shaping tool into the object; and applying the outer shaping tool on to the object in order to shape the same by moving the parts thereof in the direction towards the inner shaping tool.