Thermoplastic polymer extrusion bending

Details Thermoplastic polymer extrusion bending Thermoplastic polymer extrusion bending

B - Operations, Transporting

29

C

B29C 53/02 (2006.01) B29C 53/08 (2006.01)

Patent

CA 2428455

Methods for bending preformed thermoplastic extrusions having at least one cavity comprise filling at least one of the extrusion cavities with polymer foam and curing the foam within the filled cavity. An extrusion is heated to allow plastic deformation and then smoothly bent over a mandrill to impart a desired curved shape. Following cooling to below the extrusion's plastic deformation temperature on the mandrill, smoothly curved extrusions are removed for cooling to room temperature. Cured polymer foam within an extrusion cavity resists distortion of the cavity during the bending process.

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