EP0425872A3 - Process and device for manufacturing a polishing disc - Google Patents

Process and device for manufacturing a polishing disc Download PDF

Info

Publication number
EP0425872A3
EP0425872A3 EP19900119664 EP90119664A EP0425872A3 EP 0425872 A3 EP0425872 A3 EP 0425872A3 EP 19900119664 EP19900119664 EP 19900119664 EP 90119664 A EP90119664 A EP 90119664A EP 0425872 A3 EP0425872 A3 EP 0425872A3
Authority
EP
European Patent Office
Prior art keywords
mould part
rotation device
brought
supporting plate
crosslinking agent
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.)
Granted
Application number
EP19900119664
Other languages
German (de)
Other versions
EP0425872A2 (en
EP0425872B1 (en
Inventor
Walter Knief
Reimer Wischmann
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.)
Phoenix AG
Original Assignee
Phoenix AG
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 Phoenix AG filed Critical Phoenix AG
Publication of EP0425872A2 publication Critical patent/EP0425872A2/en
Publication of EP0425872A3 publication Critical patent/EP0425872A3/en
Application granted granted Critical
Publication of EP0425872B1 publication Critical patent/EP0425872B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • B24D13/12—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of felted or spongy material, e.g. felt, steel wool, foamed latex
    • 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
    • B24D3/22—Rubbers synthetic or natural
    • B24D3/26—Rubbers synthetic or natural for porous or cellular structure

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

The invention relates to a process for manufacturing a disc (15) for polishing or grinding display screens, comprising - a supporting plate (16) of elastomeric material and - a segmented polishing or grinding covering (21) of plastic, in particular of foamed plastic, the individual segments (22, 23, 24) being separated from one another by stelliformly and radially running grooves (25, 26, 27; 28, 29). The invention essentially comprises the following process steps: - the segments (22, 23, 24) are inserted into the cavities of the lower mould part of the rotation device; - after closing the rotation device, lower mould part and upper mould part are heated up; - the device is brought to a minimum rotational speed of 300 revolutions/minute; - the casting compound prepared in a mixing device, in particular based on a polyurethane elastomer, is mixed with a crosslinking agent; - after adding the crosslinking agent, the casting compound is brought as quickly as possible into the charging opening of the rotation device, from which it pours under the influence of the centrifugal force, while at the same time displacing air and undergoing crosslinkage, into the recesses within the upper mould part which form the supporting plate. o
EP90119664A 1989-10-24 1990-10-13 Process and device for manufacturing a polishing disc Expired - Lifetime EP0425872B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3935285 1989-10-24
DE3935285 1989-10-24

Publications (3)

Publication Number Publication Date
EP0425872A2 EP0425872A2 (en) 1991-05-08
EP0425872A3 true EP0425872A3 (en) 1992-03-11
EP0425872B1 EP0425872B1 (en) 1995-01-04

Family

ID=6392024

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90119664A Expired - Lifetime EP0425872B1 (en) 1989-10-24 1990-10-13 Process and device for manufacturing a polishing disc

Country Status (3)

Country Link
EP (1) EP0425872B1 (en)
AT (1) ATE116589T1 (en)
DE (1) DE59008192D1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB456985A (en) * 1935-05-18 1936-11-18 Carborundum Co Improvements in abrasive articles
US3252775A (en) * 1962-04-10 1966-05-24 Tocci-Guilbert Berne Foamed polyurethane abrasive wheels
DE1502649A1 (en) * 1964-08-07 1969-06-04 Osborn Mfg Co Method and device for the production of grinding tools
FR2540025A1 (en) * 1983-01-28 1984-08-03 Precidia Rotating tool comprising a body of revolution provided with active elements for machining materials such as granite, marble or a refractory product
US4539017A (en) * 1982-05-25 1985-09-03 Sea Schleifmittel Entwicklung Anwendung Gmbh Elastic grinding element and method for producing it
DE3442230A1 (en) * 1984-11-19 1986-05-28 Tyrolit-Schleifmittelwerke Swarovski KG, Schwaz, Tirol Process for producing a grinding wheel

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB456985A (en) * 1935-05-18 1936-11-18 Carborundum Co Improvements in abrasive articles
US3252775A (en) * 1962-04-10 1966-05-24 Tocci-Guilbert Berne Foamed polyurethane abrasive wheels
DE1502649A1 (en) * 1964-08-07 1969-06-04 Osborn Mfg Co Method and device for the production of grinding tools
US4539017A (en) * 1982-05-25 1985-09-03 Sea Schleifmittel Entwicklung Anwendung Gmbh Elastic grinding element and method for producing it
FR2540025A1 (en) * 1983-01-28 1984-08-03 Precidia Rotating tool comprising a body of revolution provided with active elements for machining materials such as granite, marble or a refractory product
DE3442230A1 (en) * 1984-11-19 1986-05-28 Tyrolit-Schleifmittelwerke Swarovski KG, Schwaz, Tirol Process for producing a grinding wheel

Also Published As

Publication number Publication date
ATE116589T1 (en) 1995-01-15
EP0425872A2 (en) 1991-05-08
DE59008192D1 (en) 1995-02-16
EP0425872B1 (en) 1995-01-04

Similar Documents

Publication Publication Date Title
DE68902084D1 (en) MIXING DEVICE WITH DISTRIBUTION MIXING EFFECT FOR A SCREW PRESS, AN INJECTION MOLDING MACHINE AND THE LIKE.
GB1387402A (en) Mixing process and apparatus
GB1080367A (en) Apparatus for the mixing and separating of fluent substances
CA2050813A1 (en) Process for preparing shaped bodies with integrated polyurethane skin, and shaped bodies obtained by such process
DK0427483T3 (en) Apparatus for breaking blocks of scrap material
GB1512854A (en) Device for discharging loose material
EP0425872A3 (en) Process and device for manufacturing a polishing disc
GR3034313T3 (en) Apparatus for producing plastic pipes by rotational moulding
CA1200956A (en) Process for molding reinforced articles
KR900010728A (en) Turn table assembly manufacturing method and disc player
EP0294876B1 (en) Refining device
EP0775564A3 (en) Blade for electrophotographic devices and production method and production apparatus for same
JPS5736616A (en) Method and apparatus for separating degradated layer of synthetic resin molded product
ES8609023A1 (en) Improved extractor unit for tyre vulcanizing moulds.
US6689420B2 (en) Method for achieving ornamental dispersion of particles in a resin molded article
CN107518138A (en) A kind of adjustable refiner
SU1007956A1 (en) Abrasive composition for manufacturing grinding and polishing tool
SU909531A1 (en) Centrifugal fettling machine
SU973391A1 (en) Apparatus for centricugal moulding of tires
DE4032540A1 (en) Prodn. of screen polishing discs - by loading radial mould recesses with impregnated foam polishing segments, introducing resin mix, rotating mould and heating it to cure mix
JPS5777531A (en) Centrifugal molding method of resin pipe having trapezoidal section with reinforcing fiber therein
CN1067611A (en) Non-inflatable bicycle tyre and its forming process
GB2128923A (en) Centrifugal moulding machine
EP1195760A3 (en) Apparatus on a drive to turn information disks
JPS6418614A (en) Manufacture of rubber ring for frictionally driven disc

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19901221

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB IT LI NL SE

GBC Gb: translation of claims filed (gb section 78(7)/1977)
PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB IT LI NL SE

17Q First examination report despatched

Effective date: 19930111

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19950104

Ref country code: FR

Effective date: 19950104

Ref country code: BE

Effective date: 19950104

Ref country code: NL

Effective date: 19950104

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19950104

REF Corresponds to:

Ref document number: 116589

Country of ref document: AT

Date of ref document: 19950115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59008192

Country of ref document: DE

Date of ref document: 19950216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19950404

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950305

EN Fr: translation not filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19951013

Ref country code: AT

Effective date: 19951013

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Effective date: 19951031

Ref country code: LI

Effective date: 19951031

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19951013

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960702