Pouring form for molded window sills and method of using same

Details Pouring form for molded window sills and method of using same Pouring form for molded window sills and method of using same

E - Fixed Constructions

04

G

72/114

E04G 13/04 (2006.01)

Patent

CA 1188905

POURING FORM FOR MOLDED WINDOW SILLS AND METHOD OF USING SAME ABSTRACT OF THE DISCLOSURE This invention relates to a pouring form for molded window sills characterized by a rigid frame having a generally J-shaped cross section defined by an upstanding flange, a base member depending from the lower margin of the upstanding flange and an upturned flange depending from the remote margin of the base member cooperating therewith and with the upstanding flange to produce an upwardly-opening channel; a first generally L-shaped insert having an upstanding flange paralleling the corresponding flange of the frame adapted to rest thereagainst in supporting relation thereto and a shaped flange depending from the lower margin of the upstanding flange bridging the gap between the latter and the upturned flange of the frame so as to cover the channel; a second generally L-shaped insert having upstanding and horizontal flanges; a pair of shaped plug-forming spacers adjustably positionable in longitudinally-spaced relation cooperating with the first and second inserts when placed therebetween to create a generally L-shaped cavity closed at both ends having an openingattthe top defined by a space between the upstanding insert flanges and air vents along the edge remote from the upstanding flanges for the escape of air forced therefrom; and means carried by the frame for releasably retaining the inserts and plugs in assembled relation therein. The invention also encompasses the novel method of using the pouring form which comprises injecting a hardenable plastic under pressure into the opening in the top of the form while in the fluid state, sweeping the air trapped ahead of the plastic thus injected out through the air vents in the remote edge of the mold cavity so as to leave essentially no air bubbles or voids in the molded article filling the cavity; trimming the edge of the molded article along the opening where the plastic is introduced before it hardens, and removing the molded article from the mold after it hardens. -1-

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