Radiant heater and method of post-forming thin acrylic sheets

Details Radiant heater and method of post-forming thin acrylic sheets Radiant heater and method of post-forming thin acrylic sheets

1997-08-20

1999-08-31

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

425384, 432175, 432209, B29B 1302, B29C 5142

Patent

active

059450576

ABSTRACT:
A method and apparatus for post-forming an acrylic sheet using radiant heat are disclosed. The heating apparatus includes radiant heating tubes mounted to a frame and positioned in a heating plane. A support platform is also mounted to the frame. A heating area is defined between the heating tubes and the support platform. The heating area is substantially exposed to the atmosphere, allowing unheated air to exchange with the heated air in the heating area. To use the apparatus, combustible gas is ignited and passed through the radiant heating tubes, such that heat radiates from the tubes to the heating area. An acrylic sheet is placed on the support surface such that the unfinished side of the sheet faces the radiant heating tubes. The entire sheet is positioned in the heating area for a selected period of time. The heated sheet is then positioned in a mold until almost cool. At that point, the sheet is removed and allowed to cool completely.

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