EP0299636B1 - Rotary brush with removable brush elements - Google Patents

Rotary brush with removable brush elements Download PDF

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Publication number
EP0299636B1
EP0299636B1 EP88305776A EP88305776A EP0299636B1 EP 0299636 B1 EP0299636 B1 EP 0299636B1 EP 88305776 A EP88305776 A EP 88305776A EP 88305776 A EP88305776 A EP 88305776A EP 0299636 B1 EP0299636 B1 EP 0299636B1
Authority
EP
European Patent Office
Prior art keywords
bristles
brush
hub
holding means
bristle
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.)
Expired - Lifetime
Application number
EP88305776A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0299636A1 (en
Inventor
Gerald R. C/O Minnesota Mining And Abrahamson
Ernest J. C/O Minnesota Mining And Duwell
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of EP0299636A1 publication Critical patent/EP0299636A1/en
Application granted granted Critical
Publication of EP0299636B1 publication Critical patent/EP0299636B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B7/00—Bristle carriers arranged in the brush body
    • A46B7/06—Bristle carriers arranged in the brush body movably during use, i.e. the normal brushing action causing movement
    • A46B7/08—Bristle carriers arranged in the brush body movably during use, i.e. the normal brushing action causing movement as a rotating disc
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B7/00—Bristle carriers arranged in the brush body
    • A46B7/04—Bristle carriers arranged in the brush body interchangeably removable bristle carriers
    • A46B7/044—Sliding connections for bristle carriers
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B7/00—Bristle carriers arranged in the brush body
    • A46B7/04—Bristle carriers arranged in the brush body interchangeably removable bristle carriers
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B7/00—Bristle carriers arranged in the brush body
    • A46B7/06—Bristle carriers arranged in the brush body movably during use, i.e. the normal brushing action causing movement
    • A46B7/10—Bristle carriers arranged in the brush body movably during use, i.e. the normal brushing action causing movement as a rotating cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
    • B24D13/10—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of brushes

Definitions

  • the invention relates to rotary brushes, and in particular, to rotary brushes with removable brush elements.
  • Rotary brushes which employ an annular display of bristles have been utilized in a number of applications for the surface finishing of various objects. Such brushes have been used in industrial applications to deburr and/or otherwise provide a surface finish to various manufactured articles.
  • Rotary brushes are known for surface finishing applications which include a circular hub onto which abrasive loaded filaments are adhered by a layer of cured resin which binds one end of each filament with the opposite end being displayed outward. While such brushes have found great commercial success, the process by which they are made provides certain limitations. First, the brushes are typically made by orienting the individual filaments in a flocking operation to stand erect with one end in a layer of liquid resin which is then cured to provide the brush element. The flocking operation generally limits the trim length of the bristles to less than about 12 cm.
  • finishing wheels comprising a rotary hub having a slotted peripheral surface with abrasive packs inserted into each slot to provide an abrasive flap wheel
  • abrasive packs inserted into each slot to provide an abrasive flap wheel
  • bristles in place of abrasive flaps.
  • Each abrasive pack contains like oriented abrasive flaps and the collection of flap packs provides an annulus of abrasive flaps around the hub.
  • flap wheels are disclosed, for example, in U.S. Patent Nos. 3,768,214, 4,217,737 and 4,285,171.
  • Each brush element may comprise:-
  • each brush element there is a link member made from a single, unitary, solid, integrally-formed extruded piece of urethane material having an enlarged head at one end that fits into an elongated slot in the base of the U-shaped channel member; and an enlarged head at its other end that fits into one of said circumferentially spaced slots of the rotary hub.
  • a rotary brush according to the present invention comprises: a hub having a peripheral surface and opposite side edges, the hub being slotted to provide a plurality of circumferentially spaced brush fastening slots, each of said slots being open to said peripheral surface and to said side edges and being shaped to have a larger opening at said side edges than at said peripheral surface.
  • a plurality of removable brush elements are provided, each of said brush elements comprising:
  • the invention also comprises a removable brush element as defined at (i) and (ii) above for installation on a hub constructed as defined above.
  • the preferred bristles are abrasive-loaded polymeric bristles.
  • rotary brush 10 having a cylindrical hub 11 which has a slotted peripheral surface 12 to provide slots 13 through surface 12 for holding a plurality of brush elements 14 with one brush element 14 in each slot 13.
  • Brush element 14 includes a brush 15 comprised of a plurality of resiliently flexible bristles 16 and a bristle holding means 17 for holding the bristles in a normal generally parallel outwardly projecting orientation relative to bristle holding means 17.
  • Brush element 14 includes at the end opposite brush 15 an elongate anchoring means 20 adapted for engagement in one of slots 13.
  • a resiliently flexible element 21 having a first end 22 fastened to anchoring means 20 and an opposite end 23 fastened to holding means 17 positions which hold holding means 17 in a radial rest position relative to the hub 11.
  • the relative flexibility of bristles 15 and flexible element 21 permits flexible element 21 to deflect at the greater angle (A) from a rest position within A′ than the angle (B) of deflection of the bristles 16 of the brush 15 from a normal position B′ as the hub 11 is rotated with bristles 16 (shown as a single bristle) in with a workpiece (not shown).
  • This relative deflection substantially reduces bristle flexural fatigue.
  • Hub 11 is generally cylindrically shaped and adapted for rotation on a suitable arbor, not shown, and is made of a suitable material capable of withstanding the rotational forces and mechanical movement of brush elements 14 as rotary brush 10 is rotated under normal working conditions.
  • Suitable materials for forming hub 11 include any of various metal such as aluminum, iron and alloys of iron such as steel, brass, and the like, high modulus plastic materials such as nylon, and the like.
  • the preferred material for making hub 11 is aluminum.
  • hub 11 The dimensions of hub 11 will depend upon the particular application and may vary considerably.
  • the diameter of hub 11 typically is on the order of 5 to 30 centimeters.
  • the length of hub 11 typically varies from 3 to 200 centimeters, although shorter and longer lengths are also contemplated.
  • the number of slots in peripheral surface will also vary, depending upon the diameter of the hub and upon the size of the brush elements. With thicker brush elements and smaller diameter hubs, fewer brush elements are required while larger diameter hubs and thinner brush elements generally require the use of more brush elements.
  • the number of brush elements should be sufficient to provide an adequate radial display of bristles for the particular application. Typically, the number of brush elements will be on the order of 12 for a 5 cm diameter hub to on the order of 60 for a 30 cm diameter hub. It is contemplated that not all of the slots need be fitted with brush elements. For example, alternate slots could be empty or they could contain other types of treating implements such as an element formed of low density abrasive products such as that available under the trade designation "Scotch Brite" or they may be coated abrasive flaps or strips.
  • slots may be helical in nature as disclosed in aforementioned U.S. Patent No. 4,285,171 or they may be angled with respect to the axis of rotation.
  • Slot 13 preferably is enlarged below peripheral surface 12 and open to at least one of the end surfaces of hub 11 so that an appropriately shaped anchoring element 20 (such as a metal rod) may be slipped in from the opening in the end surface to mechanically engage a loop of anchoring element 20 in hub 11 to prevent the loop from being dislodged from hub 11 as the abrasive wheel is rotated.
  • the enlarged portion of anchoring element 20 and resiliently flexible element 21 may be molded as a unitary structure of a moldable material, e.g., nylon, or may be otherwise shaped into a unitary structure, e.g., by machining or by any other suitable means.
  • Resiliently flexible bristles 16 are preferably formed of polymeric materials such as nylon which is preferably loaded with abrasive particles. Other materials may also be employed to form bristles 16, e.g., non-abrasive polymeric materials, abrasive or non-abrasive wires or the like.
  • the abrasive particles which impregnate bristles 16 are preferably formed of silicon carbide or aluminum oxide although other known abrasive materials are also useful such as ceramic abrasive material (e.g., sold under the trade designation "Cubitron") and fused alumina-zirconia abrasive material such as that sold under the trade designation "NorZon”.
  • the fiber length preferably is at least 12 cm, but it may vary from about 2 cm to about 25 cm in length. Longer and shorter fiber lengths are also possible.
  • the fiber diameter may also vary considerably but it typically is within the range of 0.5 to 1.5 mm.
  • Suitable abrasive fibers are readily commercially available.
  • the E. I. DuPont deNemours Company markets a nylon abrasive filament useful for this purpose under the trade designation "Tynex”, such as Tynex A0376, 0378, and 9376, filled with silicon carbide abrasive, and Tynex A9336, filled with aluminum oxide abrasive.
  • These fibers are commercially available in fiber diameters on the order of 18-60 mils (average diameter of about 0.5 to 1.5 mm) containing abrasive particles having a size of about 30 to 600 grade (average particle size of about 20 to 600 micrometers) with a weight percent loading of abrasive on the order of 30-40%.
  • the fibers are available on spools or in hanks in lengths of up to about 100 cm. Similar useful fibers are available from the Allied Fibers Company under the trade designation "Nybrad”. Any of these fibers may be crimped.
  • the abrasive particle size which is loaded into the bristle 16 will vary in size, depending upon the diameter of the bristle 16, with smaller diameter particles being employed in smaller diameter filaments, but generally the abrasive grade size is in the range of about 30 to 600 grade.
  • the loading of abrasive material in the fibers likewise may vary considerably, but it is preferably in the range of 10 to 20% by volume.
  • the fiber holding means is any convenient way to hold the bristles 16 in place in the proper orientation without undue bristle loss during rotation.
  • Bristle holding means 17 may include a block of cured resin which holds a collection of previously deployed fibers.
  • a preferred bristle holding means is provided as depicted in Figs. 6-9 by folding a plurality of filaments 32 at their midportion about a suitable element 30 and grasped between the opposed edges of a suitable metal channel 31 which is mechanically engaged over the folded end of the filaments to hold the same in place.
  • Fig. 4 discloses yet another method of holding the bristles 16 in place which employs spaced sheets 40 formed of any suitable material such as paper or cardboard having therebetween a bundle of filaments to provide a stack which is mechanically fastened by suitable means such as staples 41 and may be further reinforced by application of or immersion in a suitable curable resin.
  • spaced sheets 40 formed of any suitable material such as paper or cardboard having therebetween a bundle of filaments to provide a stack which is mechanically fastened by suitable means such as staples 41 and may be further reinforced by application of or immersion in a suitable curable resin.
  • Flexible element 21 can be provided by any of a variety of ways. For example, it may be a thin piece of plastic or metal which is sufficiently flexible yet somewhat rigid or it may be provided by a folded strip of metal or fabric 60 e.g., formed by nylon fibers, as depicted in Fig. 6-9.
  • a particularly useful strip material is a polymer reinforced fabric made with nylon.
  • the angle (A) of deflection of resiliently flexible element 21 will typically vary from 0°, in a rest position, to about 55°, as the wheel is rotated with the bristles in contact with a workpiece.
  • the angle (B) of deflection of the bristles 16 will typically vary from about 0° to about 15°, with the bristles 16 in contact with the workpiece. Deflection will, of course, depend upon the degree of contact and the relative flexibility of each of the materials but the angle (A) of deflection of the flexible element 21 will always exceed the angle (B) of deflection of the bristles 16.
  • a 20 brush, 20 inch (51 cm) outer diameter, 4 inch (10 cm) wide rotary brush wheel of the type depicted in Figure 1 was prepared. Although crimping of a folded collection of fibers within a metal channel can be achieved continuously with a series of crimping rolls, crimping of a laid out series of fibers 10-12 fibers deep was achieved in a table vise.
  • the metal channel was formed of ASTM A366 18 gauge (0.046 inch, 1.2 mm) dead soft, cold rolled steel to provide a U-shaped cross section with a 1/2 inch (13 mm) base and 1/2 inch (13 pm) legs (approximate dimensions).
  • the fibers were 0.04 inch (1 mm) diameter abrasive-loaded crimped fibers containing 80 grade (average particle size of about 200 micrometers) Al2O3 abrasive granules, the fibers being commercially available as DuPont "Tynex" fibers.
  • Channel (31) was preformed in a sheet metal brake.
  • the fiber loading was depressed into the metal channel using an elongate element or core rod (30). Final crimping of the metal channel locked core rod (30) and the fiber mid portions inside the metal channel.
  • a 15 brush, 9 inch (23 cm) outer diameter, 2 inch (5 cm) wide, rotary brush wheel having a 3 inch (7.6 cm) diameter hub of the type depicted in Fig. 4 was prepared.
  • a collection of 2-1/2 inch (6.4 cm), 0.035 inch (0.89 mm) diameter uncrimped DuPont "Tynex" fibers (impregnated with 180 grade, about 80 micrometers in average particle size, SiC abrasive grains) 10 to 12 fiber diameters deep was laid out to the desired length.
  • One inch (2.5 cm) of one end of the fiber collection was immersed in a 2-part curable thermosetting polyurethane resin to bond the fiber collection ends together.
  • a second similarly prepared array of fibers was prepared and the two bundles were placed on either side of a reinforced nylon cloth of the type described in Example 1.
  • the total composite assembly was permanently combined by a series of metal staples.
  • Other means of fastening that could have been employed include stitching, rivets, or similar devices.
  • Example 1 The brush of Example 1 was run continuously for 300 hours on a laboratory tester at 280 rpm in a 3/4 inch (about 19 mm) interference contact with a metal workpiece, with no bristle loss and no evidence of fiber fatigue.
  • a control brush of similar size employing the method of attaching the brush element depicted in Fig. 3 run under the same conditions also had no fiber loss but exhibited fiber movement in use which would result in fiber fatigue and failure if the brush would have been run for a longer period of time.
  • the brush of Example 2 was run continuously for 12 hours on a laboratory tester at 1800 rpm in a 1/4 inch (about 6 mm) interference contact with a metal workpiece with no bristle loss and no evidence of fiber fatigue.
  • the brush of the Control Example was run on the same equipment under equivalent conditions but before 12 hours usage it had lost all of its bristles with failure by breakage at the fiber base near the point of attachment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Brushes (AREA)
EP88305776A 1987-06-26 1988-06-24 Rotary brush with removable brush elements Expired - Lifetime EP0299636B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6771187A 1987-06-26 1987-06-26
US67711 1987-06-26

Publications (2)

Publication Number Publication Date
EP0299636A1 EP0299636A1 (en) 1989-01-18
EP0299636B1 true EP0299636B1 (en) 1993-09-22

Family

ID=22077866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88305776A Expired - Lifetime EP0299636B1 (en) 1987-06-26 1988-06-24 Rotary brush with removable brush elements

Country Status (5)

Country Link
EP (1) EP0299636B1 (enrdf_load_stackoverflow)
JP (1) JPS6426155U (enrdf_load_stackoverflow)
KR (1) KR940006888Y1 (enrdf_load_stackoverflow)
CA (1) CA1323734C (enrdf_load_stackoverflow)
DE (1) DE3884301T2 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009114630A3 (en) * 2008-03-11 2009-11-05 Voorwood Company Abrasive flap wheel with custom profiles

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5083840A (en) * 1988-04-27 1992-01-28 Minnesota Mining And Manufacturing Company Method of preparing an industrial cylinder brush arrangement for operation
US5233719A (en) * 1988-04-27 1993-08-10 Minnesota Mining And Manufacturing Co. Apparatus and brush segment arrangement for finishing wheel brushes
JPH0729265B2 (ja) * 1991-04-10 1995-04-05 株式会社ホタニ 重研ブラシロール
JP2584222Y2 (ja) * 1993-03-09 1998-10-30 日本板硝子株式会社 電磁波シールドルーム
IT1275524B (it) * 1995-07-13 1997-08-07 Favagrossa Edoardo Srl Spazzolone per impianti per il lavaggio automatico di veicoli e simili
EP0923420A1 (en) * 1996-12-26 1999-06-23 J & L Specialty Steel, Inc. Brushing process for corrosion and oxidation resistance
KR100762489B1 (ko) * 2001-11-29 2007-10-02 주식회사 포스코 스트립 빌드 업 삼면 연마 장치
JP5419561B2 (ja) * 2009-06-26 2014-02-19 株式会社 菊星 ヘアダイブラシ、及びブラシカートリッジ
DE102014116998A1 (de) * 2014-11-20 2016-05-25 Miele & Cie. Kg Seitenbürste für einen Saugroboter und Saugroboter mit einer Seitenbürste
DE102017118541A1 (de) * 2017-08-15 2019-02-21 Miele & Cie. Kg Bürste für ein selbstfahrendes Bodenbearbeitungsgerät

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1210409B (de) * 1961-09-19 1966-02-10 Herbert Schmidt Buerste mit maschinell in Umlauf setzbarem endlosem Band als Besteckungstraeger
CH407798A (de) * 1962-10-15 1966-02-15 Merit Products Inc Schleif- und Poliertrommel
US3486276A (en) * 1967-10-16 1969-12-30 Merit Products Inc Rotary abrasive device
DE1937563C3 (de) * 1969-07-24 1978-06-01 Karl 4409 Hausduelmen Lienenbruegger Walzenbürste für Straßenreinigungsmaschinen
USRE28118E (en) * 1971-04-14 1974-08-20 Belanger finishing wheels
US3798847A (en) * 1972-05-15 1974-03-26 Belanger Inc Hinge type finishing packs with replaceable units for cylindrical hub structures
US3967418A (en) * 1975-02-20 1976-07-06 Schaffner Manufacturing Company, Inc. Work polishing tool and method of making same
JPS5489390A (en) * 1977-12-27 1979-07-16 Setsuo Hotani Brush for metallic plate washing and polishing
US4183183A (en) * 1978-03-22 1980-01-15 Belanger, Inc. Pack unit and mounting means therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009114630A3 (en) * 2008-03-11 2009-11-05 Voorwood Company Abrasive flap wheel with custom profiles

Also Published As

Publication number Publication date
DE3884301D1 (de) 1993-10-28
KR890000207U (ko) 1989-03-02
DE3884301T2 (de) 1994-03-24
JPS6426155U (enrdf_load_stackoverflow) 1989-02-14
KR940006888Y1 (ko) 1994-10-06
EP0299636A1 (en) 1989-01-18
CA1323734C (en) 1993-11-02

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