| 摘要 |
A process for forming a low silhouette thermoplastic enclosure panel including the steps of heating a thermoplastic sheet while its periphery is restrained and tension exerted outward toward the periphery thereof, uniformly cooling one side of said sheet while maintaining the opposite side at or above plastic deformation temperatures until the side being cooled is sufficiently rigid to maintain its shape, removing the sheet from the restraining means and uniformly cooling both surfaces of the sheet material to effect a deflection of the sheet in a direction of the first cooled surface.
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