| 摘要 |
<p>Apparatus for discontinuously manufacturing a thermally insulated sandwich type building panel and method of fabricating it. The composite panel has two outer pre-formed planar shells with marginal transverse flanges having a small part thereof returned generally to define a further marginal co-planar flange on each which is generally parallel to the main plane of the basic planar shells. The two shells preferably have their inner surfaces pretreated to give a better bond with the plastic, and are supported in a manner with the open cavities and marginal co-planar flanges in face to face relation by one being moved into superposed relation to the other by suitable support and conveying apparatus. The supports to reenforcingly hold the shells are such as to permit the shells to be expanded apart only to a predetermined extent responsive to a previously introduced reactive plastic material into the lower shell, which plastic expands when subjected to heat. Accordingly, a unitary building panel is evolved which embodies a thermal and accoustical core or nucleus which also thermally separates the metallic exterior panels from one another to ultimately provide a building having improved thermal resistant and accoustical characteristics.</p> |
