초록 ▼

A mold especially adapted for forming precast, waffle-shaped concrete panels employs a one-piece mold body of plastic sheet material to provide a reusable mold structure that may be rapidly stripped and reset. Each corner of the mold body is open; thus, the sides of the mold present pliable flaps du

A mold especially adapted for forming precast, waffle-shaped concrete panels employs a one-piece mold body of plastic sheet material to provide a reusable mold structure that may be rapidly stripped and reset. Each corner of the mold body is open; thus, the sides of the mold present pliable flaps due to the inherent flexibility of the sheet material and are swung outwardly after molding is completed in order to release the molded product. External reinforcing members on the sides maintain the same rigid and true during the molding process. The corners are held closed by simple locking devices which are readily released for stripping. Raised portions in the mold body form the characteristic voids in the molded waffle product, and are reinforced and rigidified by a foam filler. Other features include longitudinally extending expansion joints between the mold body and reinforcing members, holdups on the pliable sides of the precasting mold, and the provision of built-in rebar supports which also form notches in the webs of the molded waffle product that serve as electrical and plumbing raceways.

대표청구항 ▼

A mold for forming precast panels, said mold comprising: a one-piece mold body of flexible material configured to impart a desired shape to a molded product formed therein, said body having a panel-forming component provided with a plurality of integral sides presenting the periphery of the body, sa

A mold for forming precast panels, said mold comprising: a one-piece mold body of flexible material configured to impart a desired shape to a molded product formed therein, said body having a panel-forming component provided with a plurality of integral sides presenting the periphery of the body, said sides having free end edges to present pliable flaps swingable on said component outwardly from normal, molding positions and away from a molded product within the mold body to permit said product to be withdrawn therefrom, the free end edges of adjacent sides defining closed corners of the body when said sides are in their normal positions and, upon said outward swinging movement of the sides, said edges separating to cause said corners to open; a plurality of elongated reinforcing members on corresponding sides extending therealong on the outside of said body, each of said members being secured to the corresponding side for movement therewith as said corners are opened and closed, and said members being constructed and arranged to prevent outward bowing of said sides when the mold body is filled with a material to be cast; and releasable means associated with said edges for holding the corners closed to maintain said sides in their normal positions during the molding process.