Method and apparatus for the production of foundry molds

Apparatus for the production of a foundry mold comprising a pattern device, a molding box arranged on said pattern device, a frame attached to said molding box, means operatively associated with said molding box for filling said molding box with molding material, said frame being arranged independently of said means for filling said molding box, stripper means operatively associated with said molding box for stripping from said molding box excess molding material introduced therein by said filling means, said stripper means having a profiled configuration adapted to be applied to said molding material to effect stripping thereof in conformity with said profiled configuration, control means operatively associated with said stripper means for operating said stripper means to effect adjustment in the height thereof in accordance with a predetermined program, and feeder means operatively associated with one of said molding box and said stripper means and being adapted to effect relative movement between said stripper means and said molding box, the extent of said relative movement corresponding at least to the horizontal extension of said molding box in the direction of said relative movement, said profiled configuration of said stripper means being configured with a predetermined relationship relative to the shape of said pattern device thereby to effect stripping of said molding material according to the shape of the pattern device which is utilized in forming said mold.

Apparatus for the production of a foundry mold comprising a pattern device, a molding box arranged on said pattern device, a frame attached to said molding box, means operatively associated with said molding box for filling said molding box with molding material, stripper means operatively associated with said molding box for stripping from said molding box excess molding material introduced therein by said filling means, said stripper means having a profiled configuration adapted to be applied to said molding material to effect stripping thereof in conformity with said profiled configuration, control means operatively associated with said stripper means for operating said stripper means to effect adjustment in the height thereof in accordance with a predetermined program, and feeder means operatively associated with one of said molding box and said stripper means and being adapted to effect relative movement between said stripper means and said molding box, the extent of said relative movement corresponding at least to the horizontal extension of said molding box in the direction of said relative movement, said stripper means comprising a plurality of profiled strippers, each of said profiled strippers being mounted to be independently adjustable in height, said apparatus including cam means operatively associated with said profiled strippers for individually adjusting the height of said profiled strippers.

Apparatus for the production of a foundry mold comprising a pattern device, a molding box arranged on said pattern device, a frame attached to said molding box, means operatively associated with said molding box for filling said molding box with molding material, stripper means operatively associated with said molding box for stripping from said molding box excess molding material introduced therein by said filling means, said stripper means having a profiled configuration adapted to be applied to said molding material to effect stripping thereof in conformity with said profiled configuration, control means operatively associated with said stripper means for operating said stripper means to effect adjustment in the height thereof in accordance with a predetermined program, and feeder means operatively associated with one of said molding box and said stripper means and being adapted to effect relative movement between said stripper means and said molding box, the extent of said relative movement corresponding at least to the horizontal extension of said molding box in the direction of said relative movement, said pattern device being moved in a given direction during production of said foundry mold, said stripper means being adapted to strip off said molding material along a plurality of different profiles, said stripper means comprising a plurality of profiled strippers each corresponding to one each of said different profiles to be stripped off.

Apparatus for the production of a foundry mold comprising a pattern device, a molding box arranged on said pattern device, a frame attached to said molding box, means operatively associated with said molding box for filling said molding box with molding material, stripper means operatively associated with said molding box for stripping from said molding box excess molding material introduced therein by said filling means, said stripper means having a profiled configuration adapted to be applied to said molding material to effect stripping thereof in conformity with said profiled configuration, control means operatively associated with said stripper means for operating said stripper means to effect adjustment in the height thereof in accordance with a predetermined program, and feeder means operatively associated with one of said molding box and said stripper means and being adapted to effect relative movement between said stripper means and said molding box, the extent of said relative movement corresponding at least to the horizontal extension of said molding box in the direction of said relative movement, said pattern device being moved in a given direction of motion during production of said foundry mold, said stripper means comprising a circular cross sectional configuration taken along a vertical plane extending transversely to said direction of motion, with a tangent to said circular configuration taken at a strip edge of said stripper means which contacts said molding material during the stripping operation extending to form an acute angle relative to said direction of said motion.

Apparatus for the production of a foundry mold comprising a pattern device, a molding box arranged on said pattern device, a frame attached to said molding box, means operatively associated with said molding box for filling said molding box with molding material, stripper means operatively associated with said molding box for stripping from said molding box excess molding material introduced therein by said filling means, said stripper means having a profiled configuration adapted to be applied to said molding material to effect stripping thereof in conformity with said profiled configuration, control means operatively associated with said stripper means for operating said stripper means to effect adjustment in the height thereof in accordance with a predetermined program, and feeder means operatively associated with one of said molding box and said stripper means and being adapted to effect relative movement between said stripper means and said molding box, the extent of said relative movement corresponding at least to the horizontal extension of said molding box in the direction of said relative movement, said feeder means including bevel gear means for moving said pattern device along a circular path between a filling position and a compression position, horizontally rotating carrier means for said stripper means arranged in operative engagement with said bevel gear means to rotate said stripper means with the same angular speed and in the same angular direction of rotation as the movement of said pattern device in said circular path while simultaneously effecting a contrary relative linear movement therebetween to move said pattern device and said stripper means relative to each other in opposite linear directions to effect the stripping operation, a first guide arm rotatably mounted on said carrier means extending horizontally and parallel to said stripper means, an upwardly directed guide roller at the outer end of said guide arm spaced from the axis of rotation thereof a distance equal to the length of the hypotenuse of a triangle formed by said hypotenuse and two sides, one of said sides corresponding to the distance from the axis of rotation of said pattern device to the geometric center of said pattern device, with the other of said sides corresponding to at least one half the length of said pattern device, a guide provided on the turning side of said pattern device having a linear configuration corresponding to the length of the distance between the center of said pattern device in said filling position and the center of said pattern device in said compression position, said guide being arranged parallel to a connecting line extending between said centers of said pattern device when in said filling position and when in said compression position, and at a distance from the mold ends of the turning side corresponding to the length of said hypotenuse.