IL25375A - Method of producing pressed paving and lining tiles,and tiles produced thereby - Google Patents

Description

Method of producing pressed paving and lining and tiles produced Invention relates to the manufacture of tiles or slabs or lining indoor and outdoor or and more particularly this invention relates to the by of tiles slabs including a layer of concrete containing a relevant amount of marble or other valuable ornamental rocky material and a ground and polished The manufacture by pressing of tiles of the character described is such manufacture comprises the of providing a mold having a planar bottom face and a contour rim or upwardly projecting confining of laying over said bottom face of the mold a cement mix containing chips of marble other valuable and stone or rock if necessary a filler consisting say of powdered said cement mix having a relativel high cement content and an excess of water to ensure proper formation of a of laying over said layer a backing layer of substantially ordinary concrete having a low cement content being essentially and of causing a planar pressing plunger of a pressing apparatus to powerfully press said superimposed layers into said mold to provide a compound or stratified The above arrangement of said layer can be if that is the mix containing the chips can be laid over the backing layer having high cement content and including the chips of costly and valuable rocky material is sometimes termed as by those skilled in the whilst the backing layer is at its turn termed as The said pressed compound article is then allowed to resulting by the pressure step being essential improving physical properties of the said outer face of said formed by the setting of rich is then ground or otherwise machined until a quite and polished surface is article thus produced and processed is thereafter ready for sale and to be transported to the place of installation for paving lining walls or anyway for the desired The objects of the said backing poor layer are that essentially concrete mix of said juxtaposed and adjacent to the very wet cement mix of the rich is designed to absorb water from said latter layer during the compaction step under the action of the pressing the poor backing layer of thickness well greater than the tiiickness of the costly materials containing rich leads to provide the article with a thickness and a strength enough to enable not yet completely set and weathered article to be removed from the manipulated and then to resist to the severe stress to which said article is finally subject when ground and polished under grinding As the described known process is the fact that said backing layer is comprised in the article and intimately connected to the hard rich layer is however a very serious negative and detrimental feature of such pressed articles of As a matter of ornamental hardness and the weather and wearing resisting properties and in general the valuable of the pressed the backing layer in said as only adds weight and thickness making thus costly and fatiguing the and locating the tile in its place of In the tendency saving money in the composition of said thick backing layer leads to limit as low as possible its cement content and to use poor aggregate which can water and may collapse or for example upon freezing and under severe thermal and therefore the connection of the ornamental tiles with the floor and in particular the wall plastering or pargeting may be deemed not durable and safe as It is therefore an object of this invention to provide method of producing tiles or slabs comprising rich layer including chips of valuable rocky or stony formed and compacted under and which are not subject to the above other More it is an object of the invention to provide a method as in a sequence of steps essentially as further steps of in laying into the mold the layers of the mixes designed to form the said rich layer and the said poor water absorbing and intermediate thin layer such to provide a plane wherein the said two after setting of the compositions thereof and completion the said can be easily detached from each and of forcedly spacing apart said whereby 25375 2 manufacture is Said layer may consist of any suitable composition provided that it does not noticeably prejudice the passage of water the rich layer and the essentially dry backing layer and it can resist to the pressure applied to the superimposed and provided that it can prevent the direct connection of the compositions of said two rich and backing at least fo a great part of the area defined by same intermediate and it provides an essentially weak bond betxireen same two rich and baoking According to a preferred feature of the such intermediate layer consists of cellulose pulp of a sheet of or of or the wherein the binder is essentially or also blotting According to another preferred feature of the a plurality of evenly arranged holes or orifices are provided and evenly arranged in said namely in said paper or to provide localized direct connection between the said in particular for adapting pressed article to to the shearing stress induced by grinding the outer face of said connection being formed at spaced locations and being of small and therefore such connection is adapted to be easily broken off when the said s are forcedly spaced In the drawings which illustrate a preferred embodiment of this invention 1 represents a rather diagrammatic perspective upper layer being broken away for representation 2 is a cross sectional elevation of same is an exploded side view of the article of the drawings and in the following disclosure the the pressing apparatus and the various means procedures required for performing the said sequence of steps are not illustrated and respectively shall not be described in as said means and steps are well known to those skilled in the manufacture of pressed compound or tiles o as discussed now the there assumed that in a conventional mold and a conventionally constructed and operated pressing a pressed article such as shown in I and 2 has been comprising a rich layer 10 and a backing layer consisting f a cement mix containing chips of the desired valuable stony material or and respectively of an ordinary concrete in particular low cement content and cheap filler said latter mix been laid in the mold in essentially dry as in the to adapt the layer formed absorb water from the rich layer The said mixes have been conventionally laid down in sequence According to the after having laid one layer as the layer formed by the mix containing the chips of marble or other desired valuable into the a sheet 11 of paper is laid on said firstly laid and then the second layer of concrete mix is formed by laying said mix on said sheet therefore said sheet will form an intermediate 2 sheet 11 comprises a plurality of spaced and evenly arranged holes 12 1 and of few millimeters such as from 6 to 15 Upon pressing and setting of the concrete the said layers 10 and 13 will he therefore directly connected at a corresponding plurality of locations to impart to the pressed compound article the required ability to resis to handling after being removed from mold grinding of its face where the layer including the chips is The backing acts as a temporary reinforcing layer for the making use of a suitable water absorbing material or composition for said intermediate such as a pretty thick paper having low binder or glue it has been proved that said intermediate layer does not detrimentally effect the proper passage of water from layer 10 to layer 13 during the pressing and the subsequent seasoning or weathering of the in comparison with the conventional production of known tiles comprising layers of same compositions and subject to same pressure and weathering most cheap wrapping paper currently available has been proved as quite adapted for making use of for providing the said sheet Whilst the above features and provisions do not adversely affect the various weathering and the intermediate layer 11 provides a shear plane wherein said two layers 10 and 13 can be easily forced apart by acting in direction in said plane with a suitable such as a not sharpened flat a capable of exerting a In the provision of said thin intermediate namely a sheet of paper between said layers 10 and leads to form a veritable cleavage plane between said wherein said layers can be spaced apart in a surprisingly easy and By making use of a sheet of paper capable of absorbing water and including a water soluble binder or glueing agent as cheap commercial papers the maceration process to which said sheet is subject after having absorbed water from layer 10 further weakens intermediate layer and the separation of the two layers is therefore further As said separation is two individual layers such as shown in 3 are therefore The layer 10 consists of the desired quite hard and polished tile or slab consisting of valuable material wherein the chips of coloured stony material are embedded in concrete Such tile be provided as thin its thickness depending from the thickness the layer as laid in the Square tiles of two feet and 5 to 6 millimeter thick have been successfully produced by applying the method of A thickness of the order of 10 millimeters is however to be If a more strong tile the layer 10 may be laid in the mold by firstly laying a mix including the chips of valuable stones nd then a mix of ordinary concrete both mixes having the proper cement content and excess of before laying thereon the sheet 11 and the poor and essentially dry composition designed to form the backin la er a tile having the chips of costly stony The layer er having been separated from the forms a of the method of the It can be crushed to provide a filler for preparing rther compositions for producing same backing By properly compounding said be individually utilised can be such as a salable slab for storeroom for An interesting feature of the invention consists in the fact as the weight and the thickness Of the detachable backing layer do not affect the thickness and weight of the very thick and heavy backing layers may be formed in view of the production of the most desirable An iron wire netting or other suitable reinforcing means can be embedded in layer while laid into the if to produce a slab of reinforced concrete is as the of the The handling of these produced heavier pressed until separation of layers 10 and 13 from each is not generally as in the plants wherein such slabs or tiles suitable conveyor or internal transportation moans are commonly insufficientOCRQuality

Claims (1)

1. method of producing pressed paving and by pressing into a sold superimposed layers a layer consisting of a concrete chips of a ornamental and valuable material and a relatively high cement content and an excess of and a backing layer consisting essentially dry ordinary conorete composition having a relatively low causing the pressed article to and polishing the outer face the facing intermediate thin layer capable of absorbing water and provide a plane between layers in the pressed and set article is in the mold between and wherein the layers in said pressed set article are spaced in said plane produce tile of said facing a consisting of said method defined in claim therein the intermediate thin layer of sheet of cellulose pulp defined in claim wherein the said intermediate thin layer consists of sheet orifices of small diameter evenly arranged in its whereby connections of small area are formed between said t orifices during pressing of the superimposed defined wherei the spaced apart of said layers is performed a er having and The method defined in wherein the said composition of ordinary concrete has a low cement content and includes cheap filler and wherein the is crushed to provide further filler She method defined in claim wherein the said composition of ordinary concrete is such to provide a consisting of an individually utilizable The method defined in claim wherein in laying the said composition to form a layer into the metallic reinforcing elements are embedded in said layer to provide a consisting of a slab of reinforced The article of manufacture produced by applying the method described in claim consisting of a tile consisting of chips of valuable stony material embedded into a pressed concrete lattice and of a concrete The tile defined in claim wherein the said chips are concentrated adjacently to its polished She tile defined in claim having a thickness not greater than 10 For the Applicants insufficientOCRQuality