Method for shaping thermoplastic fabrics

Details Method for shaping thermoplastic fabrics Method for shaping thermoplastic fabrics

B - Operations, Transporting

29

C

18/1066

B29C 43/10 (2006.01) B29C 51/00 (2006.01) B29C 51/28 (2006.01) B29C 51/42 (2006.01) B29C 43/12 (2006.01)

Patent

CA 1307894

ABSTRACT A method for shaping thermoplastic fabrics such as those made of polyester or polyamide fibers into desired three dimensional configurations through a simple procedure is disclosed. Thermoplas- tic fabrics are immersed into hot liquid metallic bath made of eutec tic metals such as lead, tin, cadmium, zinc and bismuth and formula- ted to have the eutectic point at least equal to or higher than the softening point of the thermoplastic fibers and lower than the melt- ing point of the fibers. This metallic bath may be called "fluidic lower mold." The thermoplastic fabrics are immersed into the fluidic lower mold by means of an upper mold or core member having desired outer configurations substantially corresponding to those of final products, for example, headrest or seat cushion. The upper mold pushes down the fabric into the metallic bath. Immersed fabrics receive high compressive forces and heat from the hot liquid metallic bath, and thus can easily and rapidly be shaped around the upper mold, so to speak, at a single shot.

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