WO2011079059A2 - Method of making a grinding disk and a grinding disk - Google Patents

Method of making a grinding disk and a grinding disk Download PDF

Info

Publication number
WO2011079059A2
WO2011079059A2 PCT/US2010/061210 US2010061210W WO2011079059A2 WO 2011079059 A2 WO2011079059 A2 WO 2011079059A2 US 2010061210 W US2010061210 W US 2010061210W WO 2011079059 A2 WO2011079059 A2 WO 2011079059A2
Authority
WO
WIPO (PCT)
Prior art keywords
cap
abrasive part
grinding disk
abrasive
molding material
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.)
Ceased
Application number
PCT/US2010/061210
Other languages
English (en)
French (fr)
Other versions
WO2011079059A3 (en
Inventor
Yu-Lung Wu
Yang-Wen Lee
Ming-Tien Chang
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 Innovative Properties Co
Original Assignee
3M Innovative Properties 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 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Priority to KR1020127019409A priority Critical patent/KR101851023B1/ko
Priority to JP2012546104A priority patent/JP5695666B2/ja
Priority to US13/509,340 priority patent/US8740675B2/en
Priority to EP10840023.5A priority patent/EP2516112A4/en
Publication of WO2011079059A2 publication Critical patent/WO2011079059A2/en
Publication of WO2011079059A3 publication Critical patent/WO2011079059A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • 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
    • B24D13/20—Mountings for the wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/02—Wheels in one piece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/16—Bushings; Mountings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/02—Wheels in one piece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/16—Bushings; Mountings

Definitions

  • the present invention relates to a method of making a grinding disk and a grinding disk made using the same, and more particularly to a method of making a grinding disk through injection molding.
  • a grinding disk is a consumable installed on a polishing/grinding tool.
  • the periphery of the grinding disk contacts and rubs the surface of a work piece, so as to smooth the surface of the work piece.
  • a conventional grinding disk includes a cap and an abrasive part.
  • the cap is usually a disk-shaped plastic piece.
  • the abrasive part is a disk of paper, cloth, or fiber glued together, in the center of which a through hole is provided.
  • One end of the cap is inserted in the central hole of the abrasive part, and the cap and the abrasive part are glued together.
  • the grinding disk made in such a gluing mode breaks easily when used in a polishing/grinding tool that rotates at a high speed (for example, 10,000 rpm).
  • the gluing mode requires a lot of auxiliary tools and the glue takes a long time to solidify.
  • the glue is unevenly distributed, the weight of the grinding disk is also unevenly distributed, thereby causing vibration when the grinding disk rotates.
  • the present invention is directed to a fast and simple method of making a grinding disk, in which a cap and an abrasive part are bonded through injection molding.
  • the present invention is further directed to a grinding disk which does not break easily during high speed rotation, and has evenly distributed weight so that vibration of the grinding disk is decreased during rotation.
  • the present invention provides a method of making a grinding disk which includes the following steps.
  • a cap is provided.
  • An abrasive part is provided.
  • the cap is placed on the abrasive part to form an assembly.
  • the assembly is held and a molding material is injected into a space between the cap and the abrasive part and a space inside the abrasive part, so as to bond the cap and the abrasive part.
  • the present invention further provides a grinding disk which includes an abrasive part and a cap disposed on the abrasive part.
  • the cap and the abrasive part are bonded by injecting a molding material into a space between the cap and the abrasive part and a space inside the abrasive part.
  • FIG. 1 is a bottom view of a cap according to an embodiment of the present invention.
  • FIG. 2 is a sectional view taken along line 2-2 in FIG. 1;
  • FIG. 3 is a sectional view wherein the cap in FIG. 1 is placed on an abrasive part
  • FIG. 4 is a sectional view wherein a molding material is injected into a space between the cap and the abrasive part and a space inside the abrasive part;
  • FIG. 5 is a schematic view wherein a molding material flows at a bottom of the cap
  • FIG. 6 is a bottom view of a cap according to another embodiment of the present invention.
  • FIG. 7 is a sectional view taken along line 7-7 in FIG. 6.
  • a method of making a grinding disk according to a preferred embodiment of the present invention is provided.
  • a cap 1 is provided.
  • the cap 1 has a substantially disk-shaped cap body 10 with a through hole 11.
  • An encircled wall 13 and an outer circumferential edge 14 extend downward from a bottom of the cap body 10.
  • the encircled wall 13 surrounds the through hole 11.
  • the encircled wall 13 is formed with a first pair of diametrically opposite slots 15, 15 and a second pair of diametrically opposite slots 17, 17.
  • the second pair of opposite slots 17, 17 and the first pair of opposite slots 15, 15 are approximately disposed in an orthogonal mode.
  • the length of the first pair of opposite slots 15, 15 is greater than that of the second pair of opposite slots 17, 17.
  • the outer circumferential edge 14 has a bottom side 141.
  • the cap 1 further includes two guide walls 19, 19.
  • the two guide walls 19, 19 extend from the bottom of the cap body 10 along two outer sides of the first pair of opposite slots 15, 15, respectively.
  • Each guide wall 19 has a bottom side 191.
  • the bottom sides 191, 191 of the two guide walls 19, 19 are at least flush with the bottom side 141 of the outer circumferential edge 14.
  • the bottom sides 191, 191 of the two guide walls 19, 19 extend to exceed the bottom side 141 of the outer circumferential edge 14.
  • the cap 1 is formed integrally by injecting a molding material at a location indicated by arrow A through injection molding.
  • the cap 1 may also be formed by other methods and/or using other materials.
  • an abrasive part 3 is provided.
  • the abrasive part 3 is substantially disk- shaped and has a central hole 31 and a top surface 33.
  • the abrasive part 31 is made of non-woven fabrics.
  • the abrasive part 31 may also be made of other materials such as paper, cloth, or fiber.
  • the encircled wall 13 of the cap 1 is inserted in the central hole 31 of the abrasive part 3.
  • the bottom side 141 of the outer circumferential edge 14 at the bottom of the cap 1 contacts the top surface 33 of the abrasive part 3.
  • the bottom sides 191, 191 of the two guide walls 19, 19 at least contact the top surface 33 of the abrasive part 3.
  • the bottom sides 191, 191 are directly pressed into the abrasive part 3. Therefore, the cap 1 and the abrasive part 3 form an assembly 5.
  • the assembly 5 is placed in a mold (not shown), and then a molding material is injected in a direction marked by arrow B. As shown in FIG. 5, in this embodiment, a total of three injection holes 51 is provided.
  • the molding material is used for holding the cap 1 and the abrasive part 3. As an abrasive part 3 containing cured molding material cannot serve to grind a work piece, the flowing direction of the molding material has to be controlled, so as to prevent the molding material from flowing to outside areas of the abrasive part 3, thereby shortening the service life of the abrasive part 3. As shown in FIG.
  • the injected molding material is first filled into a space between the cap 1 and the abrasive part 3 and subsequently flows through the first pair of opposite slots 15, 15 and the second pair of opposite slots 17, 17. Due to the outer circumferential edge 14 of the cap 1, the bottom side 141 of the outer circumferential edge 14 contacts the top surface 31 of the abrasive part 3, so that the molding material cannot flow out of the cap 1, and can only be permeated into the abrasive part 3. In addition, the length of the first pair of opposite slots 15, 15 is greater than that of the second pair of opposite slots 17, 17.
  • the guide walls 19, 19 at outer sides of the first pair of opposite slots 15, 15 at least contact the top surface 33 of the abrasive part 3 through the bottom sides 191, 191, so that the molding material can only flow along the guide walls 19, 19.
  • the molding material flowing through the first pair of opposite slots 15, 15 is guided to flow towards the second pair of opposite slots 17, 17. Therefore, the molding material can be evenly distributed inside specific areas of the abrasive part 3.
  • the molding material forms a holding part 53 between the cap 1 and the abrasive part 3.
  • the holding part 53 has a shaft hole 55, which is used to secure the grinding disk 7 on a shaft of the polishing/grinding tool.
  • the method of the present invention is fast and simple and the produced grinding disk does not break easily during high speed rotation (of 15,000 rpm or more), and has evenly distributed weight so that vibration of the grinding disk during rotation is decreased.
  • the present invention also has alternative designs.
  • the shaft hole 55 may be threaded, so that the shaft hole 55 is provided for the grinding disk 7 to be screwed into the shaft with matching threads of the polishing/grinding tool.
  • the length of each first opposite slot may be the same as that of each second opposite slot, as shown in FIGS. 6 and 7. Therefore, whether to dispose guide walls is determined according to the actual demands.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
PCT/US2010/061210 2009-12-25 2010-12-20 Method of making a grinding disk and a grinding disk Ceased WO2011079059A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020127019409A KR101851023B1 (ko) 2009-12-25 2010-12-20 연삭 디스크를 제조하는 방법 및 연삭 디스크
JP2012546104A JP5695666B2 (ja) 2009-12-25 2010-12-20 研削ディスクの製造方法及び研削ディスク
US13/509,340 US8740675B2 (en) 2009-12-25 2010-12-20 Method of making a grinding disk and a grinding disk
EP10840023.5A EP2516112A4 (en) 2009-12-25 2010-12-20 Method of making a grinding disk and a grinding disk

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200910259760.3 2009-12-25
CN200910259760.3A CN102107397B (zh) 2009-12-25 2009-12-25 研磨砂轮的制造方法及研磨砂轮

Publications (2)

Publication Number Publication Date
WO2011079059A2 true WO2011079059A2 (en) 2011-06-30
WO2011079059A3 WO2011079059A3 (en) 2011-10-06

Family

ID=44171739

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/061210 Ceased WO2011079059A2 (en) 2009-12-25 2010-12-20 Method of making a grinding disk and a grinding disk

Country Status (6)

Country Link
US (1) US8740675B2 (enExample)
EP (1) EP2516112A4 (enExample)
JP (1) JP5695666B2 (enExample)
KR (1) KR101851023B1 (enExample)
CN (1) CN102107397B (enExample)
WO (1) WO2011079059A2 (enExample)

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
JP5686338B2 (ja) * 2009-12-22 2015-03-18 日鉄住金防蝕株式会社 回転研削工具およびその製造方法
US9764449B2 (en) 2014-05-29 2017-09-19 Saint-Gobain Abrasives, Inc. Abrasive article having a core including a polymer material
CN104816258A (zh) * 2015-05-29 2015-08-05 广州金谷钻石工具有限公司 一种钢塑覆合钻石磨边砂轮
KR101783562B1 (ko) * 2016-12-21 2017-10-10 이장희 원터치홀더용 고정부를 장착한 연마디스크
US10596680B2 (en) 2017-01-16 2020-03-24 E&Q One-Tough Co., Ltd. Hand grinder and method of coupling grinding disc of hand grinder
KR101773447B1 (ko) * 2017-01-16 2017-08-31 주식회사 이엔큐원터치 핸드그라인더에 결합되어 사용되는 연마디스크 체결방법
CN107053033A (zh) * 2017-05-22 2017-08-18 佛山市科创力新材料有限公司 磨头的制作方法及磨头、磨具

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WO2011079059A3 (en) 2011-10-06
KR20120109572A (ko) 2012-10-08
US8740675B2 (en) 2014-06-03
US20120231712A1 (en) 2012-09-13
JP5695666B2 (ja) 2015-04-08
JP2013515619A (ja) 2013-05-09
KR101851023B1 (ko) 2018-04-20
CN102107397B (zh) 2015-02-04
CN102107397A (zh) 2011-06-29
EP2516112A2 (en) 2012-10-31

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