초록 ▼

An outer mold part is positionable over an inner mold part. Lever means are carried on opposite sides of the outer mold part and operable by a lifting force to exert a separating force between the outer and inner mold parts. Lever means are carried by the outer mold parts for locking the molded arti

An outer mold part is positionable over an inner mold part. Lever means are carried on opposite sides of the outer mold part and operable by a lifting force to exert a separating force between the outer and inner mold parts. Lever means are carried by the outer mold parts for locking the molded article to it. The outer mold part and the molded article are lifted upwardly together as an assembly and are removed entirely from the inner mold part. The assembly is then set down, the outer mold part is unlocked from the molded article, the outer mold part is then picked up and removed from the molded article, and then the bottom is poured in and is connected to the molded article.

대표청구항 ▼

A method of upright casting of a full height septic tank, comprising: locating an inner mold part having a top and upwardly tapering side wall means at a pouring site; inserting over said inner mold part an outer mold part having upwardly tapering side wall means which when the two mold parts are

A method of upright casting of a full height septic tank, comprising: locating an inner mold part having a top and upwardly tapering side wall means at a pouring site; inserting over said inner mold part an outer mold part having upwardly tapering side wall means which when the two mold parts are assembled is spaced laterally outwardly from the side wall means of the inner mold part and also projects upwardly above the top of the inner mold part; introducing a plastic or fluid substance of a type which sets into a solid into the space between the respective side wall means of the two mold parts and into the space above the top of the inner mold part which is bounded by the upwardly projecting portion of the side wall means of the outer mold part, so as to cast together integral tank top and side wall means; forming at least one opening in the top of said tank; establishing bottom keying components in the lower portions of the tank side walls while forming the tank top and side wall means; allowing said substance to set up at least until the top and side walls of said tank are self-supporting; applying a separating force between the inner and outer mold parts, and at the same time applying a lifting force on the outer mold part and the tank therein, as an assembly, so as to separate such assembly from the inner part; lifting said assembly upwardly completely free of said inner mold part; setting said assembly down on a supporting surface in a curing site spaced from the pouring site; lifting upwardly on the outer mold part alone, to cause its separation from the tank; lifting said outer mold part upwardly and completely free of said tank and removing it from the site of said tank; returning said outer mold part to the pouring site, for reinsertion over an inner mold part; introducing an additional amount of said substance through said access opening and into said tank, and depositing such substance on said supporting surface, in the area between the tank side wall means, so as to form a bottom for said tank; firmly connecting said bottom to the lower peripheral portion of said tank side wall means while forming said bottom, including using said keying components for mechanically keying the bottom to the tank side wall means; lifting the completed tank, including the bottom free of said supporting surface following sufficient hardening of the bottom and connection of the bottom to the side wall means.