| 摘要 |
A method for making acoustic cover panels for portable room partitions and the like of the type having a freestanding frame with at least one acoustic cover panel connected with and enclosing an associated side of the frame, said method comprising: providing a sound absorbing backing material having heat fusible fibers; cutting a backing sheet from the backing material to a predetermined shape with a marginal edge; providing an upholstery material having a finished exterior surface; cutting an upholstery sheet from the upholstery material to a predetermined shape with a marginal edge and a size commensurate with the backing sheet; assembling the backing sheet and the upholstery sheet by positioning an interior side of the upholstery sheet on an exterior side of the backing sheet, and indexing the same such that the marginal edges of the upholstery sheet and the backing sheet assume a generally aligned relationship, and collectively define a composite sheet with a marginal edge; heating the composite sheet to soften the heat fusible fibers in the backing sheets; forming the heated composite sheet by creasing outer portions of the composite sheet along predetermined crease lines spaced inwardly from the marginal edge of the composite sheet to form integral flanges which are bent inelastically inwardly from the crease lines at a selected angle to the remaining generally planar portion of the composite sheet to create a one-piece frameless molded cover panel with a predetermined geometrically solid shape adapted to mate with and cover one side of the panel frame; cooling the composite sheet while in the predetermined geometrically solid shape, such that the composite sheet permanently assumes the predetermined geometrically solid shape, so as to stiffen and rigidify the one-piece, frameless cover panel to a degree which facilitates manual handling of the same and attachment to the panel frame. |
