EP4281248A1 - Tambour et appareil pour le traitement de surface de morceaux de roche ou de mosaïque par rotation - Google Patents

Tambour et appareil pour le traitement de surface de morceaux de roche ou de mosaïque par rotation

Info

Publication number
EP4281248A1
EP4281248A1 EP22704577.0A EP22704577A EP4281248A1 EP 4281248 A1 EP4281248 A1 EP 4281248A1 EP 22704577 A EP22704577 A EP 22704577A EP 4281248 A1 EP4281248 A1 EP 4281248A1
Authority
EP
European Patent Office
Prior art keywords
drum
rock
rotation
pieces
brinell
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.)
Pending
Application number
EP22704577.0A
Other languages
German (de)
English (en)
Inventor
Eliseu Manuel VICENTE FRAZÃO
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.)
Fravizel Equipamentos Metalomecanicos SA
Original Assignee
Fravizel Equipamentos Metalomecanicos SA
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 Fravizel Equipamentos Metalomecanicos SA filed Critical Fravizel Equipamentos Metalomecanicos SA
Publication of EP4281248A1 publication Critical patent/EP4281248A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/02—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
    • 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
    • B28D1/008—Artificial ageing of stones; Providing stones with an antique appearance by means of a tumbler

Definitions

  • the present invention is enclosed in the area of rock or mosaic processing, in particular the processing of rocks such as limestone, slate, marble, granite or kyanite, in pieces, to provide a smoothening or ultimately a change of shape of such pieces of rock or mosaic through the tumbling of such pieces of rock or mosaic inside a rotating drum. From such procedure may result rocks with a pebble-like look.
  • rock or mosaic processing in particular the processing of rocks such as limestone, slate, marble, granite or kyanite, in pieces, to provide a smoothening or ultimately a change of shape of such pieces of rock or mosaic through the tumbling of such pieces of rock or mosaic inside a rotating drum. From such procedure may result rocks with a pebble-like look.
  • an abrasive substance may be added to the inside of the drum, to provide an additional abrasion and thereby smoothening of the rocks or mosaic under processing. Such is the case of patent application with publication number US5586925 A.
  • the present solution innovatively overcomes such issues through a drum and apparatus comprising such drum which are simple and yet highly effective.
  • a drum for the surface processing of rock or mosaic pieces through rotation which comprises:
  • each plate being adjacently provided on and connected to the one or more longitudinal inner surfaces, and having a surface with a hardness of at least 300 Brinell, each plate being so provided that such surface faces the interior of the drum, wherein each two adjacently provided plates are apart by a predefined distance in respective sides of the plates which are substantially aligned with the rotation axis of the drum, the predefined distance being substantially constant between two plates.
  • the drum of the present invention provides that, upon rotation and thereby tumbling of rock or mosaic pieces provided inside the drum, a further abrasion is provided on the rock or mosaic pieces, not only by means of the plate having a hardness of at least 300 Brinell but also through the separation between plates, which creates a further element of tumbling and abrasion.
  • the longitudinal inner surface of the drum does not need a full coverage as such not covered areas - formed by the separation between plates - provide for a higher efficiency.
  • the hardness of the plates of the present invention (be it of 300 Brinell, 400 Brinell or higher) is a hardness as measured through EN ISO 6506-1:2005.
  • the solution of the present invention results in a decrease in the time spent for a smoothening process of 70-90 %, for a same rotating speed.
  • the predefined distance is advantageously the same for every pair of adjacently provided plates.
  • the apparatus comprises control means configured to control the means for rotating the drum and thereby control the rotation of the drum, the control means being configured to provide the rotation of the drum with the adaptation of at least one operational parameter of the apparatus based on at least one physical property of the rock or mosaic pieces to be processed.
  • control means configured to control the means for rotating the drum and thereby control the rotation of the drum, the control means being configured to provide the rotation of the drum with the adaptation of at least one operational parameter of the apparatus based on at least one physical property of the rock or mosaic pieces to be processed.
  • the rock pieces comprise may comprise limestone, slate, marble, granite or kyanite pieces.
  • FIG 1 - representation of an embodiment of the drum (1) of the present invention, in cross-section.
  • the drum has a longitudinal inner surface (2) with a cylindrical shape, the cross-section thereby being circular.
  • the plates (3) are presented apart by a predefined distance (d). Every two plates are apart in the same predefined distance (d).
  • FIG 2 Figure 2 - detailed representation of an embodiment of the plate (3) of the drum (1) of the present invention, in which case the plate is bent and formed by two bent sheets: a first sheet (31) and a second sheet (32).
  • the first sheet has a hardness of at least 300 Brinell and is provided the surface with a hardness of at least 300 Brinell faces the interior of the drum. The bending allows for a better fitting to a cylindrical longitudinal inner surface (2).
  • each plate is a bent plate, the bent being provided in a direction of the plate which is substantially aligned with the rotation axis of the drum, and substantially centred.
  • the bent is provided in a direction of the plate which is substantially aligned with the rotation axis of the drum, and substantially centred.
  • each plate has a substantially rectangular shape.
  • rectangular plates are provided side by side (with the referred predefined distance / separation) and thereby cover the longitudinal inner surface of the drum.
  • each of the referred plates extends along a whole longitudinal section of the longitudinal inner surface.
  • Such solution also provides an easiness of construction since a single plate extends through the whole length of the longitudinal inner surface of the drum.
  • the tubular longitudinal inner surface of the drum may have a cylindrical or polyhedric form.
  • a cylindrical form results in a single tubular longitudinal inner surface with a circular cross-section.
  • a polyhedric form results in a plurality of longitudinal inner surfaces forming a tube, the cross-section thereby being polygonal.
  • the inner surface preferably forms a pentagonal, hexagonal, or higher order prism, the cross-section thereby being a pentagon or a hexagon or a higher order polygon.
  • the referred surface with a hardness of at least 300 Brinell is a roughened surface.
  • each plate comprises a first and a second sheet, the first sheet having the referred surface with a hardness of at least 300 Brinell and the second sheet being of a material suitable to weld the first sheet to the one or more longitudinal inner surfaces of the drum. It provides an enhanced connection between each plate and the longitudinal inner surface of the drum.
  • the first sheet is metallic, having a hardness of at least 300 Brinell.
  • the surface of each plate has a hardness of at least 400 Brinell, more preferably at least 500 Brinell, even more preferably at least 600 Brinell, at least 700 Brinell or at least 800 Brinell, in all cases determined according to EN ISO 6506.
  • the first sheet is obtained by welding with tubular wire according to DIN 8555 together with metallic powder. ln an even more specific embodiment, the first sheet comprises overlapping weld beads obtained such that form of cracks during cooling. Preferably, the cracks are perpendicular to the surface of the first sheet.
  • the second sheet comprises steel. More preferably the second sheet is made of an S235, S275 or S355 steel according to EN 10025, preferably S235.
  • the predefined distance is 5-50 mm, preferably 20-40 mm, more preferably of 25 mm. Such is associated with the typical size of pieces of rock to be tumbled / processed.
  • each longitudinal inner surface has a length of 1,000-3,000 mm, preferably 2,000-4,000 mm, more preferably of 2,000, 2,500, 3,000 or 4,000 mm.
  • the plates are rectangular, having a length equal to the length of the longitudinal inner surface and a width of 225-325 mm, preferably 250- 300 mm, more preferably 275 mm.
  • the apparatus comprises control means configured to control the means for rotating the drum and thereby control the rotation of the drum, the control means being configured to provide the rotation of the drum with the adaptation of at least one operational parameter of the apparatus based on at least one physical property of the rock or mosaic pieces to be processed.
  • the physical parameter comprises an average diameter of rocks prior to processing, a desired average diameter of rocks after processing, the form of rocks prior to processing, the desired form of rocks after processing and/or the average hardness of rocks to be processed.
  • the operational parameter comprises the rotation speed of the drum and/or the time of continuous rotation.
  • the apparatus is configured to provide a rotation speed of at least 5 rotations per minute (rpm), preferably from 10-20 rpm, more preferably of 10 or 15 rpm.
  • the apparatus is configured to, in a continuous rotation of a plurality of rock or mosaic pieces, have two or more rotation speeds. Such allows to work with a lower rotation speed in a first stage of the processing / tumbling, when the pieces of rock are of higher dimension and more irregular, and a higher rotation speed in a second stage of the processing / tumbling, when the pieces of rock have been already abrased and are of lower dimension and more regular. Such procedure may be repeated, creating several different stages with several different rotation speeds and respective periods of time of duration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

La présente invention se rapporte au domaine de traitement de roche, en particulier au traitement de roches telles que le calcaire, l'ardoise, le marbre, le granit ou la cyanite, en morceaux, pour fournir un lissage ou, finalement, un changement de forme de ces morceaux de roche par le polissage de ces morceaux de roche à l'intérieur d'un tambour rotatif. Une telle procédure peut conduire à des roches ayant un aspect de type poire. La présente invention comprend un tambour (1) et un appareil respectif pour le traitement de surface de morceaux de roche ou de mosaïque par rotation ayant une pluralité de plaques (3) disposées à l'intérieur du tambour (1), ayant une surface présentant une dureté d'au moins 300 Brinell et étant telles que ladite surface fait face à l'intérieur du tambour (1), les deux plaques (3) disposées de manière adjacente étant chacune espacées d'une distance prédéfinie (d) sur les côtés respectifs des plaques qui sont sensiblement alignées sur l'axe de rotation du tambour (1).
EP22704577.0A 2021-01-22 2022-01-20 Tambour et appareil pour le traitement de surface de morceaux de roche ou de mosaïque par rotation Pending EP4281248A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PT11702621 2021-01-22
PCT/IB2022/050457 WO2022157652A1 (fr) 2021-01-22 2022-01-20 Tambour et appareil pour le traitement de surface de morceaux de roche ou de mosaïque par rotation

Publications (1)

Publication Number Publication Date
EP4281248A1 true EP4281248A1 (fr) 2023-11-29

Family

ID=80786579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22704577.0A Pending EP4281248A1 (fr) 2021-01-22 2022-01-20 Tambour et appareil pour le traitement de surface de morceaux de roche ou de mosaïque par rotation

Country Status (2)

Country Link
EP (1) EP4281248A1 (fr)
WO (1) WO2022157652A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK264478A (da) * 1978-06-13 1979-12-14 Sf Sten Ag Betonsten samt fremgangsmaade og apparat til fremstilling af brosten af beton
US5586925A (en) 1994-04-08 1996-12-24 Donato DiNorcia Apparatus and method for processing marble
PE20061001A1 (es) * 2005-01-18 2006-11-13 Vulco Sa Pieza protectora componente de un molino de pulverizacion
EP1775069A1 (fr) * 2005-10-14 2007-04-18 Klaps Invest Dispositif pour le vieillissement artificiel de pierres
KR100700133B1 (ko) * 2006-11-03 2007-03-28 (주)신일석재산업 표면이 전체적으로 매끄러운 조경석을 얻을 수 있는 석재연마장치 및 연마방법

Also Published As

Publication number Publication date
WO2022157652A1 (fr) 2022-07-28

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