EP1354680A1 - Verfahren und Gerät zum Schneiden von plattenförmigem Gegenständen - Google Patents

Verfahren und Gerät zum Schneiden von plattenförmigem Gegenständen Download PDF

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Publication number
EP1354680A1
EP1354680A1 EP03008907A EP03008907A EP1354680A1 EP 1354680 A1 EP1354680 A1 EP 1354680A1 EP 03008907 A EP03008907 A EP 03008907A EP 03008907 A EP03008907 A EP 03008907A EP 1354680 A1 EP1354680 A1 EP 1354680A1
Authority
EP
European Patent Office
Prior art keywords
blade
slab
shaped items
cutting
shaped
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03008907A
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English (en)
French (fr)
Inventor
Raffaele Beneventi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Viki Ceramiche Artistiche -Srl
Original Assignee
Viki Ceramiche Artistiche -Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Viki Ceramiche Artistiche -Srl filed Critical Viki Ceramiche Artistiche -Srl
Publication of EP1354680A1 publication Critical patent/EP1354680A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/30—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor to form contours, i.e. curved surfaces, irrespective of the method of working used
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/006—Artificial ageing of stones; Providing stones with an antique appearance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/12—Saw-blades or saw-discs specially adapted for working stone
    • B28D1/121—Circular saw blades

Definitions

  • the present invention concerns a method and an apparatus for cutting slab-shaped items, in particular for cutting ceramic products to obtain therefrom decorating.means with jagged and irregular edges.
  • Italian patent 1.294.897 discloses a method for producing mosaic tesserae provided with an antique appearance comprising causing a rear lay face of a slab-shaped product to interact with a cutting unit, scoring said lay face according to at least two directions and at a preset and adjustable depth to create in said lay face preferential fracture lines, fracturing the product along the preferential fracture lines, tumbling the tesserae thereby obtained to round their edges.
  • a drawback of the method described above is the low productivity, inasmuch as the slab-shaped products have first to be scored and then to be fractured. This causes a certain complexity, also in view of the fact that the products that have already been scored have to be transferred by means of suitable transfer means.
  • An object of the invention is to improve the systems for. cutting slab-shaped items in such a way as to obtain therefrom decorating means provided with the appearance of natural fractured stone.
  • Another object of the invention is to obtain systems for cutting slab-shaped items in such a way as to obtain decorating means that have the appearance of antique mosaic tesserae.
  • an object is to obtain decorating means imitating tesserae that have been partially worn by prolonged walking over them like those that constitute the antique mosaic flooring.
  • a further object of the invention is to obtain a method that enables slab-shaped items to be cut with a high degree of productivity in such a way as to make irregular edges therein.
  • a still furthers object of the invention is to obtain an apparatus for cutting slab-shaped items making jagged edges therein that is easy to make and use and has a moderate cost.
  • a method for cuttings slab-shaped items to obtain in said slab-shaped items edge means having an irregular profile, comprising positioning said slab-shaped items in such a way that a rear lay face thereof is turned towards blade means of a cutting device and actuating said blade means in contact with said slab-shaped items, characterised in that said actuating comprises making a through cut in said slab-shaped items.
  • the slab-shaped items can be cut. in such a way that, on the visible front face thereof the blade means makes separation lines extending according to an irregular profile imitating.the profile of the edges of slabs of natural stones obtained by fracturing quarried blocks.
  • the slab-shaped items can also be cut to obtain therefrom decorating means that are very similar to antique mosaic tesserae.
  • the slab-shaped items are advanced towards the blade means through conveyors means.
  • said blocking comprises pressing the slab-shaped items on the conveyor means through pressing means.
  • an apparatus for cutting slab-shaped items to obtain in said slab-shaped items edge means having an irregular profile and affecting borders of a visible face, comprising blade means arranged to interact with said slab-shaped items, support means arranged to receive said visible face resting thereon, characterised in that said blade means is arranged in such a way as to 'make a through cut in said slab-shaped items.
  • an apparatus can be obtained that enables slab-shaped items to be cut to make decorating means provided with edges that have a jagged profile that is similar to the profile of slabs of natural stone, or antique mosaic tesserae.
  • the apparatus according to the invention is furthermore easy to make and to ruse in addition to having a rather limited cost.
  • the blade means comprises a blade provided with cutting edge means having an interrupted profile.
  • the outermost portion of the blade is subdivided into a plurality of sectors that are separated from each other by recesses obtained between said sectors.
  • the sectors of the blade means thus transmit to the slab-shaped items an impulsive force such as to exert thereupon not only a cutting action but also a partial fracturing action that is mainly concentrated near the visible front face.
  • the blade means therefore partially fractures the slab-shaped items by making therein irregular edges extending according to an irregular line. It should also be noted that the blade means can remove from said visible front face small splinters or fragments of the material that constitutes the slab-shaped items in such away as to give the decorating means a chipped appearance that makes them even more similar to slabs of natural stone, or to tesserae of antique mosaics.
  • the slab-shaped items further comprise a further portion, nearer the visible front face, in which the side faces are jagged, said portion being obtained due to the action of the part of the blade means comprising the cutting edge means and in which said sectors are defined.
  • the blade means comprises a further blade and a still further blade associated with. said blade in such a way that said blade is placed between the further blade and the still further blade.
  • the further blade and the still further blade are arranged to make non-through cuts in the slab-shaped items, as will be more clearly shown below.
  • the further blade and the still further blade have a circular shape and a diameter that is-less than the diameter of the aforesaid blade.
  • the further blade and the still further blade have the same diameter.
  • the above-mentioned blade, the further blade and the still further blade are arranged in such a way as to form a blade pack that is connected to shaft means that rotates the above-mentioned blade, the further blade and the still further blade.
  • a preset number of blade packs can be connected, that are similar to the pack described above, to obtain a plurality of decorating means from the slab-shaped items.
  • the blade packs can be connected to the shaft means in such a way that each of the blade packs is equidistant from the adjacent blade packs.
  • the slab-shaped items may comprise, for example, a ceramic product or a slab of natural stone that has been previously treated.
  • Slab-shaped items of this type are rather fragile and the material of which they are constituted can be affected by structural defects acting as starting points generating undesired fractures. Said fractures generally, tend to propagate according to directions that are different from those defining the jagged edges that have to be made, thereby impairing cutting operations and causing breakage of the slab-shaped items.
  • the blade pack described above is used instead of a single blade a greater quantity of the material constituting the slab-shaped items is subjected to the cutting operations, which enables to delimit with a certain precision the portion of the slab-shaped items in which the edges of the decorating means are to be created.
  • the decorating means so obtained have a base body delimited by jagged edges at the visible. front face and by substantially flat side faces in a region of said body that is further from the visible front face.
  • the jagged edges are generated by means of the through cuts. made in the slab-shaped items by said blade, whilst the side faces are defined by non-through cuts made by the further blade and by the still further blade.
  • Said side faces are therefore partially recessed with respect to the jagged edges in such a way that the decorating means are T-shaped if viewed in cross-section.
  • the blade means comprises a blade having a substantially circular shape and shaped in such a way as to have three cutting edges, a first cutting edge arranged to perform a through cut in the slab-shaped items, a second cutting edge and a third cutting edge, between which the first cutting edge is placed, which is arranged to make non-through cuts in the slab-shaped items.
  • the first cutting edged has an interrupted profile in such a way as to be subdivided into a plurality of sectors that are separated from each other by recesses formed therebetween.
  • the second cutting edge and the third cuttings edge have a smaller diameter than the diameter of the first cutting edge.
  • the second cutting edge and the third cutting edge further have the same diameter.
  • the blade means comprising the shaped blade provided with three distinct cutting edges acts in practice in a substantially analogous manner to the blade pack comprising three mutually associated blades, which has been described previously.
  • the support means comprises conveyor means arranged below said blade means and suitable for causing the slab-shaped items to interact with the blade means.
  • the apparatus further comprises blocking means suitable for blocking the slab-shaped items on the conveyor means to prevent the slab-shaped items from shifting with respect to the conveyor means whilst the blade means cuts the slab-shaped items.
  • the blocking means comprises pressing means arranged to press the slab-shaped items on the conveyor means.
  • the apparatus may comprise, downstream of the blade means, tumbling means arranged to partially round the edges of the decorating means obtained by cutting the slab-shaped items.
  • blade means for cutting slab-shaped items for obtaining in said slab-shaped items edge means comprising a blade suitable for interacting with said slab-shaped items; characterised in that said blade comprises an annular thickenings extending near a peripheral end of said blade and more internally with respect to said peripheral end.
  • said blade and said annular thickening have a circular shape.
  • the annular thickening extends bilaterally from the blade.
  • the annular thickening comprises a pair of external surfaces facing the slab-shaped. items and defining a cutting edge and a further cutting edge.
  • the cuttings edge and the further cutting edge are arranged laterally with respect to the cutting means of the blade and recede towards the centre of the blade with respect to the cutting means.
  • Figures 1, 2, 7 and 8 show an apparatus 1 arranged for cutting slab-shaped items, for example ceramic tiles 2, to obtain decorating means, known as "tozzetti” provided with at least ones jagged edge 4 so as to be similar to slabs of stone obtained by fracturing from blocks of stone material, or mosaic .tesserae having a worn or partially consumed appearance.
  • decorating means known as "tozzetti” provided with at least ones jagged edge 4 so as to be similar to slabs of stone obtained by fracturing from blocks of stone material, or mosaic .tesserae having a worn or partially consumed appearance.
  • the apparatus 1 comprises blade means 5 arranged to cut the ceramic tiles 2 and support means 6 positioned underneath the blade means 5 to support the ceramic tiles 2.
  • the blade means 5 is arranged to pass either only through most of the depth of the ceramic tiles 2, or, as will be shown in greater detail subsequently, through the entire depth of the ceramic tiles 2.
  • the ceramic tiles 2 are arranged on the support means 6 in such a way that a front face 2b, which has to be visible after laying, is in contact with a support surface 7 of the support means 6, whilst a rear lay face 2a is turned towards the blade means 5.
  • the support means 6 comprises conveyor means 8, provided with a motorized belt 9 translating in the direction indicated by the arrow F and arranged to transfer the ceramic tiles 2 towards the blade means 5.
  • the belt 9 guide means 10 is associated that is arranged to interact with opposite edges of the .ceramic tiles 2 to prevent the ceramic tiles 2 from partially rotating or shifting with respect to the belt 9, during transfer towards, and interaction with, the blade means 5.
  • the apparatus 1 further comprises positioning means 37 to further keep the ceramic tiles 2 in the correct position whilst said ceramic tiles 2 are cut by the blade means 5.
  • the positioning means 37 comprises pressing means 11 provided with a plurality of wheels 12 interacting with the rear lay face 2a to press the ceramic tiles onto the belt means 9.
  • the wheels 12 are rotatably supported by corresponding levers 13 hinged on appendages 14 of a support bar 15.
  • Threaded rods 17 are connected to the support bar 15, said threaded rods 17 can be used to translate the support bar 15 in the direction of arrow F1 to vary the intensity of the thrust that the wheels 12 transmit to the ceramic tiles 2.
  • the blade means 5 is connected to a shaft 18 that rotates said blade means 5.
  • a plurality of blade means 5 can be connected to the shaft means 18, each of the blade means 5 being equidistant from the blade means 5 adjacent to it to simultaneously make a corresponding plurality of cuts in the same ceramic tile 2.
  • the blade means 5 comprises a first blade 19 arranged to make a cut in the ceramic tiles 2 passing through the entire depth thereof and thus extending between the lay face 2a and the visible front face 2b.
  • the blade means 5 further comprises a second blade 20 and a third blade 21 associated with the first blade 20 in such a way that the first blade 20 is placed between the second blade 20 and the third blade 21.
  • the second blade 20 and the third blade 21 have a smaller diameter than the diameter of the first blade 19: the second blade 20 and the third blade 21 therefore make non-through cuts in the ceramic tiles 2.
  • the diameter of the second blade 20 is the same as the diameter of the third blade 21.
  • the first blade 19, the second blade 20 and the third blade 21 are assembled together in such a way as to form a blade pack 22 that is connected to the shaft means 18.
  • the blade pack 22 is fixed to the shaft means 18 through a pair of ring nuts 23, 24 that are tightened onto a threaded section 18a of the shaft means 18 whereat the blade pack 22 was positioned.
  • Figures 5 and 6 show blade means 5 obtained according to a different preferred embodiment.
  • the blade means 5 comprises a shaped blade 25.
  • the shaped blade 25 comprises an annular thickening 38 extending near a peripheral end 39 of the shaped blade 25 that defines a first cutting edge 26, in such a way that the annular thickening 38 is arranged further inside than the peripheral end 39.
  • Each end zone of the blade 25 is therefore cross-shaped when viewed in cross-section.
  • the annular thickening 38 extends .bilaterally with respect to the blade 25 and is provided with a pair of external surfaces facing towards the ceramic tiles 2 and defining a second cutting edge 27 and a third cutting edge 28 arranged laterally and in a slightly receding manner towards the centre of the blade 25 compared with the first cutting edge 26.
  • the first cutting edge 26 is arranged to make through cuts in the ceramic tiles 2 whereas the second cutting edge 27 and the third cutting edge 28 are suitable for making non-through cuts in the ceramic tiles 2.
  • the second cutting edge 21 and the third cutting edge 28 have diameters that are substantially the same as one another and less than the diameter of the first cutting edge 26, which is placed between them.
  • the first blade 19 and the first cutting edge 26 are provided with a bit 29 advantageously made from diamond-tipped steel, interrupted by a plurality of recesses 30 arranged radially to define a plurality of sectors 31.
  • the sectors 31 transmit to the ceramic tiles 2 an impulsive force, exerting thereupon, in addition to a cutting action, also a partial fracturing action that affects the part of the ceramic tiles 2 nearer the front lay face 2b.
  • a tumbler Downstream of the blade means 5 a tumbler can be provided inside which the tozzetti 3 are inserted to partially round the edges 4 thereof.
  • Figures 7 and 8 show a "tozzetto" 3 made with the apparatus 1, comprising a body 33 that is laterally defined by side faces 32.
  • the side faces 32 have a portion 34 nearer a rear lay face 3a of the tozzetto 3, which is substantially flat and a further portion 35 further from the rear lay face 3a, with a conformation such as to define an edge 4 of a visible front face 3b of the tozzetto 3, said edge 4 having an irregular profile.
  • the portion 35 is obtained by means of the first blade 19, or by means of the first cutting edge 26 of the shaped blade 25.
  • the portion 34 is obtained in one case by means of the second blade 20 or of the third blade 21 and in another case by means of the second cutting edge 27 or of the third cutting edge 28 of the shaped blade 25.
  • the portion 34 is thus partially recessed with respect to the further portion 35 in such a way that the tozzetti 3 have a T-shaped cross-section.
  • zones 36 can be identified that originate from the removal of small splinters, or fragments, of the material that forms the ceramic tiles 2, which contribute to making the tozzettos 3 more similar to slabs of natural stone, or to tesserae of antique mosaics.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
EP03008907A 2002-04-18 2003-04-16 Verfahren und Gerät zum Schneiden von plattenförmigem Gegenständen Withdrawn EP1354680A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMO20020095 2002-04-18
IT2002MO000095A ITMO20020095A1 (it) 2002-04-18 2002-04-18 Metodo e apparato per il taglio di elementi lastriformi

Publications (1)

Publication Number Publication Date
EP1354680A1 true EP1354680A1 (de) 2003-10-22

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EP03008907A Withdrawn EP1354680A1 (de) 2002-04-18 2003-04-16 Verfahren und Gerät zum Schneiden von plattenförmigem Gegenständen

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EP (1) EP1354680A1 (de)
IT (1) ITMO20020095A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100019604A1 (it) * 2021-07-23 2023-01-23 Studio Immagine S R L Metodo ed impianto per la produzione di manufatti ceramici con bordi irregolari

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0319196A2 (de) * 1987-12-01 1989-06-07 Malcolm Blackler Trembath Maschine für das Schneiden von Stein oder anderen Materialien
US5197453A (en) * 1992-08-28 1993-03-30 Sanders Saws, Inc. Two-tier groove cutting circular saw blade with multiple core assembly
EP0684340A1 (de) * 1994-05-27 1995-11-29 COMPOSANTS TARNAIS BETON S.A., Société Anonyme Herstellungsverfahren für aus einer zusammengesetzten Platte ausgeschnittene Belagselemente und Belagselement
DE19640462C1 (de) * 1996-09-30 1998-04-23 Helmut Jaroniak Verfahren und Vorrichtung zur Herstellung einer ebenen Grundplatte und einer zwei winklig zueinander verlaufende Abschnitte aufweisenden Stufenplatte aus keramischem Material für Bauzwecke
JP2001038718A (ja) * 1999-07-28 2001-02-13 Shigeru Suzuki ダイヤモンドチップ付き切断体
WO2002002290A1 (en) * 2000-07-06 2002-01-10 Casa Dolce Casa S.P.A. Tile and method for its production
WO2002007940A1 (en) * 2000-07-20 2002-01-31 Gieffevi Eurogroup S.R.L. Method for producing mosaic tesserae and tesserae obtainable by using those tesserae

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0319196A2 (de) * 1987-12-01 1989-06-07 Malcolm Blackler Trembath Maschine für das Schneiden von Stein oder anderen Materialien
US5197453A (en) * 1992-08-28 1993-03-30 Sanders Saws, Inc. Two-tier groove cutting circular saw blade with multiple core assembly
EP0684340A1 (de) * 1994-05-27 1995-11-29 COMPOSANTS TARNAIS BETON S.A., Société Anonyme Herstellungsverfahren für aus einer zusammengesetzten Platte ausgeschnittene Belagselemente und Belagselement
DE19640462C1 (de) * 1996-09-30 1998-04-23 Helmut Jaroniak Verfahren und Vorrichtung zur Herstellung einer ebenen Grundplatte und einer zwei winklig zueinander verlaufende Abschnitte aufweisenden Stufenplatte aus keramischem Material für Bauzwecke
JP2001038718A (ja) * 1999-07-28 2001-02-13 Shigeru Suzuki ダイヤモンドチップ付き切断体
WO2002002290A1 (en) * 2000-07-06 2002-01-10 Casa Dolce Casa S.P.A. Tile and method for its production
WO2002007940A1 (en) * 2000-07-20 2002-01-31 Gieffevi Eurogroup S.R.L. Method for producing mosaic tesserae and tesserae obtainable by using those tesserae

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 19 5 June 2001 (2001-06-05) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100019604A1 (it) * 2021-07-23 2023-01-23 Studio Immagine S R L Metodo ed impianto per la produzione di manufatti ceramici con bordi irregolari

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Publication number Publication date
ITMO20020095A1 (it) 2003-10-20
ITMO20020095A0 (it) 2002-04-18

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