Method for shaping thermoplastic fabrics
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United States of America Patent
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Nov 28, 1989
Grant Date -
N/A
app pub date -
Oct 21, 1988
filing date -
Feb 23, 1987
priority date (Note) -
Expired
status (Latency Note)
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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. Thermoplastic fabrics are immersed into hot liquid metallic bath made of eutectic metals such as lead, tin, cadmium, zinc and bismuth and formulated to have the eutectic point at least equal to or higher than the softening point of the thermoplastic fibers and lower than the melting 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 preferably along with a protective sheet laid beneath 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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