EP0523624A2 - Schleifkörpern, insbesondere zum Entsanden, und Verfahren zur Herstellung - Google Patents

Schleifkörpern, insbesondere zum Entsanden, und Verfahren zur Herstellung Download PDF

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Publication number
EP0523624A2
EP0523624A2 EP92111976A EP92111976A EP0523624A2 EP 0523624 A2 EP0523624 A2 EP 0523624A2 EP 92111976 A EP92111976 A EP 92111976A EP 92111976 A EP92111976 A EP 92111976A EP 0523624 A2 EP0523624 A2 EP 0523624A2
Authority
EP
European Patent Office
Prior art keywords
abrasive
during
natural
granular material
molds
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Withdrawn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
EP92111976A
Other languages
English (en)
French (fr)
Other versions
EP0523624A3 (en
Inventor
Roberto Redaelli
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.)
ROLLWASCH ITALIANA SpA
Original Assignee
ROLLWASCH ITALIANA SpA
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 ROLLWASCH ITALIANA SpA filed Critical ROLLWASCH ITALIANA SpA
Publication of EP0523624A2 publication Critical patent/EP0523624A2/de
Publication of EP0523624A3 publication Critical patent/EP0523624A3/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
    • B24D3/28—Resins or natural or synthetic macromolecular compounds
    • 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
    • B24B31/14—Abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
    • B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
    • B24D3/344—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent the bonding agent being organic

Definitions

  • the present invention relates to an agglomerated abrasive device particularly for tumbling and the like and to a manufacturing process.
  • the mass tumbling of surfaces which consists in deburring, polishing and honing surfaces which are usually but not necessarily metallic, usually uses abrasive grains in which the parts to be processed are immersed; the parts are moved inside appropriate machines.
  • the friction due to the relative movement between the parts to be processed and the abrasive grains causes deburring, polishing and honing, according to the type of abrasive used, possibly with the addition of appropriate chemical additives.
  • Another problem is related to the hardness of the granules, which usually had a relatively high lower hardness limit, preventing their efficient use in the case of relatively soft and elastic materials to be treated, which caused the well-known effect of surface pitting.
  • abrasive powders such as pulverized pumice, corundum, silica and the like
  • a binder forming a mixture which can be given a preset and constant shape, such as cones, pyramids, triangular prisms and the like, subsequently curing said binder so as to produce preformed abrasive granules of substantially constant quality and shape.
  • Ceramic-binder preformed abrasives are obtained by mixing the abrasive powder with a ceramic paste, thus obtaining a mixture which can be formed easily.
  • this mixture is extruded through dies of appropriate shape and size, i.e. for example triangular, star-shaped, cylindrical and the like, cut into segments of appropriate length and then baked in kilns at high temperature, i.e. approximately 1300 o Celsius.
  • the finished granules are very hard, have a precise and constant shape and have characteristics similar to natural abrasives, although the abrasive powder is dispersed within the entire mass of the granule.
  • Plastic-binder preformed abrasives are produced by mixing the abrasive powder with a synthetic resin which is poured into molds after mixing. Due to either the temperature or appropriate catalysts, the resinoid binder is made to cure, obtaining granules which have substantially constant shape and dimensions and have a specific hardness which is lower than that of granules with ceramic binder.
  • the aim of the present invention is to eliminate or substantially reduce the problems described above in known types by providing an agglomerated abrasive device particularly for tumbling and the like which allows considerable cost savings with respect to so-called plastic-binder preformed elements.
  • an object of the present invention is to provide an agglomerated abrasive device which eliminates the problems related to the shape of natural abrasive granules.
  • Another object of the present invention is to provide an agglomerated abrasive device whose hardness is intermediate between ceramic-binder and plastic-binder preformed elements.
  • Not least object of the present invention is to provide an agglomerated abrasive device which is relatively easy to manufacture and at competitive costs.
  • an agglomerated abrasive device particularly for tumbling and the like, characterized in that it comprises an element which has a preset geometrical shape, said element comprising powdery abrasive means and granular abrasive means embedded in binding means.
  • said figure illustrates a known plastic preformed element 1 which has granules 3 of abrasive material, such as silica, corundum, pumice and the like, embedded in a synthetic resin 2.
  • abrasive material such as silica, corundum, pumice and the like
  • An agglomerated abrasive device particularly for tumbling and the like according to the invention illustrated in sectional view in figure 2, comprises an element 4 which has a preset geometric shape, such as cones, cylinders, triangular prisms and the like.
  • the element 4 comprises powdery abrasive means, constituted by granules 5 of pulverized abrasive material of the above mentioned types, and granular abrasive means, constituted by granules 6 made of natural material or of natural granular material, embedded in binding means constituted by a synthetic resin 7.
  • the abrasive powder 5 and the granules 6 are dispersed uniformly in the synthetic resin 7.
  • the synthetic resin 7 can be cured either by heat or by means of appropriate catalysts.
  • the natural abrasive granules 6 can be constituted by arenites or, as will become apparent hereinafter, by fragmented used plastic preformed elements or other natural rocks having similar hardness and resilience characteristics.
  • arenite is a sedimentary rock which was formed at great depths, approximately 3000 meters, and was thus subjected to enormous pressures and, due to positive orogenesis, has resurfaced in some limited and well-determined regions of the earth's crust, hence its relative rarity.
  • plastic preformed elements i.e. the remainder of a load of abrasive devices according to the invention, or known plastic preformed elements, can be recycled in order to obtain the granules 6 in addition to arenites.
  • the result is that the abrasive devices 4 can be produced both at high temperature and at low temperature, using the various polymerization methods described above.
  • the described process can be performed with known machines, without completely revolutionizing the production cycle provided for known preformed plastic elements.
  • the above method can be carried out in a fully automated manner.
  • the invention achieves the intended aim and objects, constituting an abrasive device which is capable of perfectly replacing known ceramic and plastic preformed elements, furthermore advantageously reducing the amount of synthetic resin used at least by 40-50% and consequently reducing costs. Furthermore, as previously mentioned, it is possible to recycle used plastic preformed elements as granules 6, further reducing the production costs of devices according to the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP19920111976 1991-07-18 1992-07-14 Agglomerated abrasive device particularly for tumbling and the like, and manufacturing process Withdrawn EP0523624A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI911998A IT1252328B (it) 1991-07-18 1991-07-18 Dispositivo abradente agglomerato particolarmente per burattatura e simili nonche' procedimento realizzativo.
ITMI911998 1991-07-18

Publications (2)

Publication Number Publication Date
EP0523624A2 true EP0523624A2 (de) 1993-01-20
EP0523624A3 EP0523624A3 (en) 1993-05-12

Family

ID=11360380

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920111976 Withdrawn EP0523624A3 (en) 1991-07-18 1992-07-14 Agglomerated abrasive device particularly for tumbling and the like, and manufacturing process

Country Status (2)

Country Link
EP (1) EP0523624A3 (de)
IT (1) IT1252328B (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0649705A1 (de) * 1993-10-22 1995-04-26 Sintobrator, Ltd. Trockengleitschleifenvorrichtung
EP1207011A2 (de) * 2000-11-07 2002-05-22 Politess S.N.C. Schleifkörper zur Oberflächenbehandlung in einer drehende und schwingende Vorrichtung
EP1543933A2 (de) * 2003-12-16 2005-06-22 Polyomnia S.r.l. Formen zur Herstellung von Kunststoff-Schleifartikeln und deren Formträger
WO2005058571A2 (en) * 2003-12-16 2005-06-30 Polyomnia S.R.L. Moulds for the production of plastic abrasives and support thereof
WO2007098856A1 (en) * 2006-03-02 2007-09-07 International Chips S.R.L. Highly efficient abrasive preformed body for vibratory finishing of metallic and nonmetallic parts
WO2007149704A1 (en) * 2006-06-22 2007-12-27 3M Innovative Properties Company Compressible abrasive article
DE102006047442B3 (de) * 2006-09-20 2008-04-10 Walther Trowal Gmbh & Co. Kg Gleitschleifkörper
JPWO2012137713A1 (ja) * 2011-04-06 2014-07-28 新東工業株式会社 バレル研磨用研磨体
DE102018007188A1 (de) 2018-09-11 2018-12-06 Franz Gruber Gleitschleifkörper
DE102018010347B3 (de) 2018-09-11 2020-06-04 Franz Gruber Gleitschleifkörper

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3613317A (en) * 1967-05-26 1971-10-19 Minnesota Mining & Mfg Media for finishing plastics and soft metals
FR2214741A1 (de) * 1973-01-23 1974-08-19 Oxy Metal Finishing Corp
DE2538053A1 (de) * 1974-08-29 1976-03-18 Ceratex Eng Ltd Kunststoff-schleifelement und verfahren zu dessen herstellung
SU582957A1 (ru) * 1975-12-11 1977-12-05 Воронежский Политехнический Институт Способ изготовлени абразивного инструмента
GB2018811A (en) * 1978-03-28 1979-10-24 Schweizer Schmirgel Schleif Abrasive materials and abrasive bodies
GB2089281A (en) * 1980-12-04 1982-06-23 Roto Finish Co Producing finishing chips
EP0280463A2 (de) * 1987-02-26 1988-08-31 Minnesota Mining And Manufacturing Company Abtragbare Agglomerate und diese Agglomerate enthaltende Schleifmittel
JPH1182029A (ja) * 1997-09-04 1999-03-26 Nippon Soken Inc 内燃機関の成層燃焼方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3613317A (en) * 1967-05-26 1971-10-19 Minnesota Mining & Mfg Media for finishing plastics and soft metals
FR2214741A1 (de) * 1973-01-23 1974-08-19 Oxy Metal Finishing Corp
DE2538053A1 (de) * 1974-08-29 1976-03-18 Ceratex Eng Ltd Kunststoff-schleifelement und verfahren zu dessen herstellung
SU582957A1 (ru) * 1975-12-11 1977-12-05 Воронежский Политехнический Институт Способ изготовлени абразивного инструмента
GB2018811A (en) * 1978-03-28 1979-10-24 Schweizer Schmirgel Schleif Abrasive materials and abrasive bodies
GB2089281A (en) * 1980-12-04 1982-06-23 Roto Finish Co Producing finishing chips
EP0280463A2 (de) * 1987-02-26 1988-08-31 Minnesota Mining And Manufacturing Company Abtragbare Agglomerate und diese Agglomerate enthaltende Schleifmittel
JPH1182029A (ja) * 1997-09-04 1999-03-26 Nippon Soken Inc 内燃機関の成層燃焼方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 465 (M-882)(3813) 20 October 1989 & JP-A-11 82 029 ( ARON KASEI CO. LTD. ) 19 July 1989 *
SOVIET PATENTS ABSTRACTS Week 7843, 1978 Derwent Publications Ltd., London, GB; AN 78-J5034A 43 & SU-A-582 957 (VORON. POLY.) 8 December 1977 *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0649705A1 (de) * 1993-10-22 1995-04-26 Sintobrator, Ltd. Trockengleitschleifenvorrichtung
EP1207011A2 (de) * 2000-11-07 2002-05-22 Politess S.N.C. Schleifkörper zur Oberflächenbehandlung in einer drehende und schwingende Vorrichtung
EP1207011A3 (de) * 2000-11-07 2002-09-04 Politess S.N.C. Schleifkörper zur Oberflächenbehandlung in einer drehende und schwingende Vorrichtung
EP1543933A2 (de) * 2003-12-16 2005-06-22 Polyomnia S.r.l. Formen zur Herstellung von Kunststoff-Schleifartikeln und deren Formträger
WO2005058571A2 (en) * 2003-12-16 2005-06-30 Polyomnia S.R.L. Moulds for the production of plastic abrasives and support thereof
EP1543933A3 (de) * 2003-12-16 2005-10-26 Polyomnia S.r.l. Formen zur herstellung von kunststoff-schleifartikeln und deren formträger
WO2005058571A3 (en) * 2003-12-16 2006-04-13 Polyomnia S R L Moulds for the production of plastic abrasives and support thereof
EP1661680A1 (de) * 2003-12-16 2006-05-31 Polyomnia S.r.l. Formen zur Herstellung von Kunststoff-Schleifartikeln und deren Formträger
WO2007098856A1 (en) * 2006-03-02 2007-09-07 International Chips S.R.L. Highly efficient abrasive preformed body for vibratory finishing of metallic and nonmetallic parts
WO2007149704A1 (en) * 2006-06-22 2007-12-27 3M Innovative Properties Company Compressible abrasive article
DE102006047442B3 (de) * 2006-09-20 2008-04-10 Walther Trowal Gmbh & Co. Kg Gleitschleifkörper
JPWO2012137713A1 (ja) * 2011-04-06 2014-07-28 新東工業株式会社 バレル研磨用研磨体
DE102018007188A1 (de) 2018-09-11 2018-12-06 Franz Gruber Gleitschleifkörper
WO2020052797A1 (de) 2018-09-11 2020-03-19 Franz Gruber Gleitschleifkörper
DE102018010347B3 (de) 2018-09-11 2020-06-04 Franz Gruber Gleitschleifkörper
DE102018007188B4 (de) 2018-09-11 2021-07-08 Franz Gruber Gleitschleifkörper
US12042898B2 (en) 2018-09-11 2024-07-23 Rösler Holding Gmbh Slide-grinding body

Also Published As

Publication number Publication date
ITMI911998A0 (it) 1991-07-18
IT1252328B (it) 1995-06-08
EP0523624A3 (en) 1993-05-12
ITMI911998A1 (it) 1993-01-18

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