Brick Making Machine Having Stripping Means
In an automatic water struck block machine including a mold for molding wet clay into bricks
, releasing the suction between the wet clay in the mold and the overlying slide board by pushing the slide board across the mold for a limited distance and then forcing the slide board upwardly from said mold and immediately thereafter, raising said mold and slide board vertically far enough to leave a group of wet bricks resting on an underlying pallet ready to go to the drying area.In the manufacture of bricks, old and well understood procedures are used. A wooden mold, open top and bottom and initially resting on a separate wooden bottom section called a slide board, is placed under a large press which forces wet claydownward simultaneously into all the mold compartments. When the press retracts, the now filled mold resting on the slide board is moved laterally from the press. The top surface of the clay is smooth and flush with the top surface of mold.
The filled mold is then covered with a pallet which is a metal sheet large enough to overly the mold and the clay contents. The complete unit consisting of the slide board bottom, the pallet top and the filled mold therebetween is moved by aconveyor to a so-called dumper, a device which inverts the unit to place the pallet on the bottom and the slide board on top.
The next operation according to the prior practice calls for the removal of the slide board from the top of the mold. This is followed by vertical lifting of the mold away from the wet bricks, so that the bricks remain side by side on the metalpallet.
The pallets with the wet bricks thereon are collected on racks and taken to a drying area. After sufficient drying, the bricks are fired in kilns all according to well understood procedures.
Following the separation of the slide board from the mold and the mold from the wet bricks, a conveyor takes the mold and slide board (then repositioned on the top of the mold) to another dumper which inverts the parts to place the slide board onthe bottom with the mold on top. The mold and slide board then pass through a water spray which thoroughly wets the four vertical sides of each mold compartment and the upper surface of the underlying slide board. This occurs just prior to the moldagain being placed in the press to receive the next charge of wet clay.
The application of water to the mold acts as a lubricant to facilitate subsequent removal of the mold and gives the finished brick surface a distinctive texture so that bricks so made are called "water struck" bricks.
The invention of the present application is particularly concerned with the construction of the slide board in relation to the mold so that through the use of novel automatically operated mechanisms, the slide board, when the mold unit is at themold removal station, can first be slid a limited distance across the top of the mold to partially expose the upper surfaces of the wet bricks thereby to relieve the suction effect. Simultaneously with the release of the suction, the slide board islifted a short distance to be physically separated from the upper surfaces of the wet bricks in the mold. This lifting is done by a device known as a slide lifter in which the slide board is mounted. Immediately after the slide board is separated fromthe mold, the slide lifter and the mold therewithin are picked up by other lifting means which lifts the mold and the slide board clear of the wet bricks which remain behind on the pallet. The pallet with the bricks thereon is then removed by a conveyorto be collected with other preceding and subsequent pallets on a wheeled rack which will be moved to a drying location.
The mold and slide board are then carried by the lifting means to another adjacent conveyor which takes the empty mold and slide board with its associated slide lifter to a dumper (an inverter) whence the unit goes to the water spray to be readyfor re-insertion in the clay loading press.
At the number 2 dumper station, the mold, slide board and slide lifter are inverted to be in proper loading position. The number 4 conveyor takes the unit through the sprayer to the mold pusher 32 which then places the mold in the block machine receive a new charge of wet clay. The process above described is continuously repeated.
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