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GB952762A - Method for making grinding wheels and the like - Google Patents

Method for making grinding wheels and the like

Info

Publication number
GB952762A
GB952762A GB652261A GB652261A GB952762A GB 952762 A GB952762 A GB 952762A GB 652261 A GB652261 A GB 652261A GB 652261 A GB652261 A GB 652261A GB 952762 A GB952762 A GB 952762A
Authority
GB
United Kingdom
Prior art keywords
abrasive
mixture
resin
resin composition
granular
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
Application number
GB652261A
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.)
Osborn Manufacturing Corp
Original Assignee
Osborn Manufacturing Corp
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 Osborn Manufacturing Corp filed Critical Osborn Manufacturing Corp
Publication of GB952762A publication Critical patent/GB952762A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/58—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising fillers only, e.g. particles, powder, beads, flakes, spheres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/11—Details
    • B02C7/12—Shape or construction of discs
    • B02C7/13—Shape or construction of discs for grain mills
    • 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
    • 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
    • B24D3/32—Resins or natural or synthetic macromolecular compounds for porous or cellular structure
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/003—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
    • B29C41/042—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould by rotating a mould around its axis of symmetry
    • B29C41/045—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould by rotating a mould around its axis of symmetry the axis being placed vertically, e.g. spin casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/0423—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by density separation
    • B29C44/043—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by density separation using a rotating mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
    • B29C41/042—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould by rotating a mould around its axis of symmetry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/736—Grinding or polishing equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

A method of producing a polishing or abrasive article comprises differentially centrifuging a mixture comprising hardenable liquid synthetic resin composition, granular polishing or abrasive material and relatively fine particulate filling material to concentrate the granular material in a local region in the body of the resin while leaving the particulate filling material substantially unaffected and substantially uniformly distributed throughout the mixture, and hardening the resin composition. The preferred method uses a foamable resin composition and produces a foamed product. Suitable resins are polyurethanes, preferably used as prepolymers. Suitable fillers are finely ground diatomaceous earth, limestone, aluminium oxide, magnesium oxide and silicon carbide flour. Flakes of graphite and metallic powder or flakes can also be added to the mixture. Aluminium oxide is a specified abrasive. A suitable polyurethane may be made by blending a polyester (e.g. from trimethylol propane, adipic acid, phthalic anhydride and dimer acids) with metatoluene diisocyanate containing ethyl cellulose. Heat resistance may be improved by adding polymethylol phenyls. Zinc stearate may be added to improve the cell structure. Water for the foaming can be carried by the filler which may be finely ground mica. Muscovy glass, aluminium silicate, silicate aerogel, calcium carbonate and attapulgite. Other resins than polyurethanes can be used. These include phenol-formaldehyde resins and also epoxy resins. A mixture of epoxy resin, polyoxyethylene sorbitan monolaurate, p, p1-oxybis (benzene-sulphonyl hydrazide or N, N1-dimethyl- N, N1-dinitroso-terephthalamide blowing agent and diethylenetriamine.ALSO:<PICT:0952762/C3/1> A method of producing a polishing or abrasive article comprises differentially centrifuging a mixture comprising hardenable liquid synthetic resin composition, granular polishing or abrasive material and relatively fine particulate filling material to concentrate the granular material in a local region in the body of the resin while leaving the particulate filling material substantially unaffected and substantially uniformly distributed throughout the mixture and hardening the resin composition. The preferred method uses a foamable resin composition and produces a foamed product. Suitable fillers are finely ground diatomaceous earth, limestone, aluminium oxide, magnesium oxide and silicon carbide flour. Flakes of graphite and metallic flakes or powder can also be added to the mixture. Aluminium oxide is a specified abrasive. When a polyurethane is the synthetic resin, the added water (to produce a foamed resin) may be carried on a filler such as finely ground mica, Muscovy glass, aluminium silicate, silicate aerogel, calcium carbonate and attapulgite. Heat resistance may be improved by adding polymethylol phenyls and zinc stearate may be added to improve the cell structure. Instead of polyurethanes phenol-formaldehyde and epoxy resins can be used. The foamable mixture, less in amount than required to fill the mould and just prior to initiation of foaming is introduced into an annular, rotatable mould, which is then rotated until gelling of the resin has taken place and may optionally be subjected to cooling during this stage. For final setting the wheel, still in the mould, is subjected to heating. The resulting product has an integument a3 of substantially non-cellular resin, a central portion in which the cells a are numerous and minute and an outer portion in which the minute cells have coalesced to form bubbles a1 and the intervening web structure a2 is thickened, and the abrasive grains g have collected and are carried by webs a2 and spaced by bubbles a1. By using an intermediate grade of abrasive it is possible to produce a wheel having three annuli, viz. the outer annulus, in which the larger and/or heavier granular abrasive is collected, an intermediate annulus in which is retained the abrasive less susceptible to the action of centrifugal force and an inner annulus substantially free of granular abrasive.
GB652261A 1960-03-02 1961-02-22 Method for making grinding wheels and the like Expired GB952762A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1230360A 1960-03-02 1960-03-02

Publications (1)

Publication Number Publication Date
GB952762A true GB952762A (en) 1964-03-18

Family

ID=21754328

Family Applications (1)

Application Number Title Priority Date Filing Date
GB652261A Expired GB952762A (en) 1960-03-02 1961-02-22 Method for making grinding wheels and the like

Country Status (6)

Country Link
BE (1) BE600727A (en)
CH (1) CH417077A (en)
ES (1) ES265344A1 (en)
FR (1) FR1286109A (en)
GB (1) GB952762A (en)
LU (1) LU39840A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685299A1 (en) * 1994-06-03 1995-12-06 Shin-Etsu Handotai Company Limited Polishing pad used for polishing silicon wafers and polishing method using the same
CN108406625A (en) * 2018-02-23 2018-08-17 南安市丰州鑫荣农机设计中心 Grinding tool rapid shaping processing unit (plant)
CN109433383A (en) * 2018-08-22 2019-03-08 响水华夏特材科技发展有限公司 A kind of recoverying and utilizing method of waste and old aerogel material
CN114833733A (en) * 2022-04-25 2022-08-02 亳州市鑫磊超硬材料有限责任公司 Diamond resin grinding wheel and preparation method thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA704909B (en) * 1969-10-29 1971-04-28 Norton Co Method of grinding
DE3043796A1 (en) * 1980-11-20 1982-07-22 Walter 6342 Haiger Klingspor FLEXIBLE ABRASIVE, EXAMPLE IN THE FORM OF SHEETS, TAPES, DISKS OR THE LIKE
CN106738547B (en) * 2016-11-18 2020-05-22 山西贵友自动化设备有限公司 Rotary casting system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685299A1 (en) * 1994-06-03 1995-12-06 Shin-Etsu Handotai Company Limited Polishing pad used for polishing silicon wafers and polishing method using the same
US5827395A (en) * 1994-06-03 1998-10-27 Shin-Etsu Handotai Co., Ltd. Polishing pad used for polishing silicon wafers and polishing method using the same
CN108406625A (en) * 2018-02-23 2018-08-17 南安市丰州鑫荣农机设计中心 Grinding tool rapid shaping processing unit (plant)
CN109433383A (en) * 2018-08-22 2019-03-08 响水华夏特材科技发展有限公司 A kind of recoverying and utilizing method of waste and old aerogel material
CN109433383B (en) * 2018-08-22 2022-05-17 响水华夏特材科技发展有限公司 Recycling method of waste aerogel material
CN114833733A (en) * 2022-04-25 2022-08-02 亳州市鑫磊超硬材料有限责任公司 Diamond resin grinding wheel and preparation method thereof
CN114833733B (en) * 2022-04-25 2024-03-08 亳州市鑫磊超硬材料有限责任公司 Diamond resin grinding wheel and preparation method thereof

Also Published As

Publication number Publication date
ES265344A1 (en) 1961-06-16
CH417077A (en) 1966-07-15
FR1286109A (en) 1962-03-02
BE600727A (en) 1961-08-28
LU39840A1 (en) 1961-08-28

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