| 摘要 |
A method and apparatus for laminating a polyester film having a heat activated adhesive on one surface onto a porous polystyrene base to form the core of a spa cover or the like. The apparatus includes a table onto which a base is placed and a clamping structure for holding the film, the table communicating with a source of sub-atmospheric pressure. The clamping structure includes a pair of frames, one of which is pivotable relative to the other to open and receive the film therebetween to close upon and clamp the film. A lifting mechanism may lift both frames with the film clamp between the frames. The table is moveable into an oven having heating elements positioned at a location above the table and the clamping frames are lifted to bring the film in close proximity to the heating elements. When the film is heated to the point that the film is readily formable and the adhesive is activated, the frames are brought down so that the film seals with a gasket about the table and also engages the upper surface of the base. The source of sub-atmospheric pressure is then actuated to pull the air in the space between the film and the base through the porous base and through the table and thereby draws the film against the exposed surfaces of the base to laminate the film to such surfaces. After excess film is removed, at least one slit is made in the upper surface of the base and the base is inverted on the table, and the process is repeated.
|
