Foundry sand molding apparatus

Apparatus comprising a spaced head and table between which foundry sand molds are formed by squeezing sand in a flask surrounding a pattern positioned on said table, said head carrying a plurality of different squeeze boards and being indexible for selectively aligning said squeeze boards with said table to form different molds, said head being vertically spaced above said table and having a sand supply passage therethrough, said head being rotatably indexible about a substantially horizontal axis above said table, and drive means for rotatably indexing said head selectively in steps in the same direction or in an opposite direction.

Apparatus comprising a spaced head and table between which foundry sand molds are formed by squeezing sand in a flask surrounding a pattern positioned on said table, said head carrying a plurality of different squeeze boards and being indexible for selectively aligning said squeeze boards with said table to form different molds, said head being vertically spaced above said table and having a sand supply passage therethrough, said head being selectively indexible to a sand supply position aligning said passage with said table for supplying sand therethrough to a flask on said table, said head being indexible from said sand supply position to one of a plurality of selective positions for aligning one of said plurality of different squeeze boards with said table, and said head being rotatably indexible about a substantially horizontal axis.

Apparatus comprising a spaced head and table between which foundry sand molds are formed by squeezing sand in a flask surrounding a pattern positioned on said table, said head carrying a plurality of different squeeze boards and being indexible for selectively aligning said squeeze boards with said table to form different molds, a pneumatically-operated vibrator associated with each different squeeze board carried by said head, valve means carried by said head and being automatically responsive to the position of said head for supplying air only to the vibrator associated with the squeeze board aligned with said table, said head being vertically spaced above said table and rotatably indexible about a substantially horizontal axis, and said valve means having a gravity-responsive movable valve member for opening air flow to the vibrator associated with the squeeze board aligned with said table while closing air flow to the other vibrator.

Apparatus comprising a spaced head and table between which foundry sand molds are formed by squeezing sand in a flask surrounding a pattern positioned on said table, said head carrying a plurality of different squeeze boards and being indexible for selectively aligning said squeeze boards with said table to form different molds, said head being rotatable about a horizontal axis above said table and having a sand supply passage therethrough, said head carrying a pair of different squeeze boards on opposite sides of said passage, said head being rotatably indexible to a sand supply position with said passage aligned with said table and being selectively rotatable ninety degrees in either of opposite directions from said sand supply position to align either of said squeeze boards with said table.

Apparatus comprising:

• a head and table between which foundry sand molds are squeezed, said head being spaced vertically above said table and rotatably indexable about a substantially horizontal axis, a sand supply passage through said head, said head being rotatably indexable to a sand supply position with said passage substantially vertically aligned with said table for supplying sand therethrough to a flask on said table, at least one squeeze board carried by said head for respectively cooperating with a sand mold, and said head being rotatably indexable from said sand supply position to align said squeeze board with said table.

Apparatus comprising:

• a head and table between which foundry sand molds are squeezed, said head being rotatably indexable about a substantially horizontal axis above said table, a plurality of different squeeze boards carried by said head for selective alignment with said table, said head being shiftable along said axis between indexed and indexable positions, locking means for locking said head against rotation in said indexed position, and said locking means being automatically engaged upon shifting movement of said head along said axis to said indexed position and being automatically disengaged upon shifting movement of said head along said axis to said indexable position.

Apparatus comprising a head and table between which foundry sand molds are squeezed, said head carrying a plurality of different squeeze boards for cooperation with different patterns and flasks supported on said table, said head being indexible for selectively aligning one of said squeeze boards with said table, a pneumatically-operated vibrator associated with each said squeeze board, position-responsive valve means for selectively supplying air to said vibrators, said valve means being automatically responsive to the position of said head for supplying air only to the vibrator associated with the squeeze board aligned with said table while blocking air to the other vibrators, said head being rotatable about a substantially horizontal axis above said table and said valve means including a gravity-responsive movable valve member for opening air flow to the vibrator associated with the squeeze board aligned with said table while closing air flow to the other vibrators.