Abstract A lower fixed frame has a lower fixed piston thereon. An upper movable frame has thereon an upper movable piston adapted to be moved toward and away from the lower frame such that the upper and lower pistons oppose each other. A mold having a crosssection corresponding to that of the pistons is positioned to support brick raw material between the upper and lower pistons. A pair of bellows surround the upper and lower pistons in an air tight manner. The upper bellows has its lower end connected to a plate which is supported by servo-cylinders. An air tight ring is fixed to the bottom of the plate and is adapted to create an air tight seal with the top of the mold when the servo-cylinders are actuated to move the upper bellows downwardly. A suitable vacuum pump is connected by vacuum lines to the areas within each of the bellows.
In a brick press of the type including a lower piston mounted on a lower frame, an upper piston mounted on an upper frame to oppose said lower piston, a mold for supporting brick raw material between said pistons, and means for moving one of said pistons toward the other for pressing therebetween said raw material; the improvement comprising: a first bellows means surrounding said one piston; means for moving said first bellows means to create an air tight seal with said mold, said means for moving said first bellows means comprising a plate sealed to said first bellows, at least one servo-cylinder supporting said plate on said frame supporting said one piston, said servo-cylinder movable to selectively move said plate toward and away from said mold, and a resilient ring positioned on said plate and adapted to contact said mold when said servo-cylinder moves said plate toward said mold; a second bellows means surrounding said other piston; said first and second bellows means forming an air tight chamber enclosing said raw material when said first bellows means is moved to create said air tight seal with said mold; and means to create a vacuum in said chamber and within said raw material.
Claim 2
Dependent Claim
203 words
In a brick press of the type including a lower piston mounted on a lower frame, an upper piston mounted on an upper frame to oppose said lower piston, a mold for supporting brick raw material between said pistons, and means for moving one of said pistons toward the other for pressing therebetween said raw material; the improvement comprising: a first bellows means surrounding said one piston; means for moving said first bellows means to create an air tight seal with said mold, said means for moving said first bellows means comprising a plate sealed to said first bellows, at least one servo-cylinder supporting said plate on said frame supporting said one piston, said servo-cylinder movable to selectively move said plate toward and away from said mold, and a resilient ring positioned on said plate and adapted to contact said mold when said servo-cylinder moves said plate toward said mold; a second bellows means surrounding said other piston; said first and second bellows means forming an air tight chamber enclosing said raw material when said first bellows means is moved to create said air tight seal with said mold; and means to create a vacuum in said chamber and within said raw material.