Plastic article or earthenware shaping or treating: apparatus – With means applying coating material to work or work contact... – To work downstream of shaping means
Patent
1983-02-18
1986-03-18
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
With means applying coating material to work or work contact...
To work downstream of shaping means
425105, 425141, 425220, 425367, B28B 1104
Patent
active
045765618
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a method for adjusting at a predetermined value, the height of building blocks and similar, notably concrete blocks which are to be laid dry upon one another to be filled or not thereafter with a binder, by laying over the top sides of the blocks an amount of material which is hardenable and bindable thereon, with a height which is higher than the difference between said predetermined height and the actual height of said block, and levelling thereafter said material amount over said block sides before hardening thereof until the total block height formed by the sum of said block height and said material height, substantially corresponds to said predetermined height.
This invention has for an object to provide a method of the above-defined kind which might easily be adapted to all of the known methods for manufacturing building blocks, notably concrete blocks in a static press.
For this purpose the method according to the invention comprises in sequence, forming inside a mould blocks the height of which varies between said predetermined height and a height which is lower than said predetermined height, laying over the green, still moist blocks an amount of said material the height of which is higher than the height difference between said predetermined height and the actual height of that block being considered, and levelling said material amount until the total height of said block as formed by the sum of the actual block height and the height of said material amount substantially corresponds to the predetermined height, said blocks moving substantially continuously at least from that moment where they come out of the moulds up to said laying of material over said blocks.
The invention further pertains to a device for the working of the above-defined method, that is a device for adjusting in the height building blocks and similar notably hollow blocks to be laid dry upon one another comprising a metering apparatus for laying over the top sides of said blocks, an amount of material which is hardenable and bindable thereon, and a levelling apparatus for tamping down said material over the blocks, to impart to said blocks a total height which substantially corresponds to a predetermined height.
Said device comprises a conveyor for the blocks extending from a press inside which said blocks are formed, and moving substantially continuously through said levelling apparatus, a levelling member above a space wherein said blocks are brought by the conveyor to tamp down that material laid down on said blocks by said metering apparatus, and spacing or guiding means allowing to retain said member at such a distance relative to the bottom block side which substantially corresponds to said predetermined height, during the tamping down of said material laid over the blocks.
Advantageously, said levelling member comprises at least one substantially horizontal cylinder which is so operated as to have each point on the cylinder-shaped surface generate a cycloidal curve relative to the blocks, that is said cylinder does roll without slipping on that material which has been laid over said blocks.
In a particular embodiment of the invention, said spacing or guiding means are fixed relative to said levelling member and cooperate with a plate or board bearing said blocks to be adjusted at that time where the cylinder lies in the low position thereof, that is adjacent to the top surface of said blocks, the spacing between that portion of the levelling member used for tamping down the material on the blocks, and that portion of the spacing or guiding means used to cooperate with a plate or board bearing the blocks to be adjusted being substantially equal to the predetermined total height of said blocks.
Other details and features of the invention will stand out from the following description given by way of non limitative example and with reference to the accompanying drawing, which shows diagrammatically in elevation, a particular embodiment of a device for adjusting in the height building blocks.
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Schaefle Henri
Van de Caveye Yves
Hanota Holdings S.A.
Housel James C.
Woo Jay H.
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