DE2538053B2 - Abrasives for use in vibratory grinding - Google Patents

Abrasives for use in vibratory grinding

Info

Publication number
DE2538053B2
DE2538053B2 DE19752538053 DE2538053A DE2538053B2 DE 2538053 B2 DE2538053 B2 DE 2538053B2 DE 19752538053 DE19752538053 DE 19752538053 DE 2538053 A DE2538053 A DE 2538053A DE 2538053 B2 DE2538053 B2 DE 2538053B2
Authority
DE
Germany
Prior art keywords
urea
formaldehyde resin
abrasives
abrasive grains
grinding
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
DE19752538053
Other languages
German (de)
Other versions
DE2538053A1 (en
Inventor
Gordon Andrew Colne Lancashire Atkinson (Ver. Koenigreich)
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.)
CERATEX ENGINEERING Ltd COLNE LANCASHIRE (VER KOENIGREICH)
Original Assignee
CERATEX ENGINEERING Ltd COLNE LANCASHIRE (VER KOENIGREICH)
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
Priority claimed from GB3772074A external-priority patent/GB1480096A/en
Application filed by CERATEX ENGINEERING Ltd COLNE LANCASHIRE (VER KOENIGREICH) filed Critical CERATEX ENGINEERING Ltd COLNE LANCASHIRE (VER KOENIGREICH)
Publication of DE2538053A1 publication Critical patent/DE2538053A1/en
Publication of DE2538053B2 publication Critical patent/DE2538053B2/en
Ceased legal-status Critical Current

Links

Classifications

    • 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

Description

1515th

Die Erfindung betrifft einen Schleifkörper zur «io. Verwendung beim Gleitschleifen, bestehend aus Gleit- ;rv körnern, aus Siliziumkarbid, Quarzsand od. dgl. und gehärtetem Harnstoff-Formaldehydharz als Bindemittel sowie eine Mischung zum Herstellen des Schleifkörpers aus Schleifkörnern, ungehärtetem Harnstoff-Formaldehydharz und einem Härter (FR-PS 12 40 740).The invention relates to a grinding body for «io. Use in vibratory grinding, consisting of sliding ; rv grains, of silicon carbide, quartz sand or the like and hardened urea-formaldehyde resin as a binder and a mixture for producing the grinding wheel from abrasive grains, uncured urea-formaldehyde resin and a hardener (FR-PS 12 40 740).

Die Verwendung von Harnstoff-Formaldehydharzen als Bindemittel anstelle von sonst häufig verwendeten Polyesterharzen bietet gegenüber den letzteren verschiedene Vorteile, wie beispielsweise bessere Umwelt- »verträglichkeit der beim Naß-GJeitschleifen anfallenden [Abwässer und geringere leistungsmindernde Schaumbildung beim Schleifprozeß.The use of urea-formaldehyde resins as binders instead of the otherwise commonly used ones Polyester resins offer various advantages over the latter, such as better environmental »Compatibility of those incurred during wet grinding [Wastewater and lower performance-reducing foaming during the grinding process.

Der Anwendung harnstoff-formaldehydgebundener Schleifkörper in der Praxis stand bislang jedoch entgegen, daß vor allem während der Härtung Formaldchydgas abgegeben wird, das die menschlichen Schleimhäute reizt und schädigt.However, the use of urea-formaldehyde-bonded abrasives in practice has hitherto stood still contrary to the fact that formaldehyde gas is given off, especially during the hardening process, which the human Mucous membranes irritate and damage.

Der Erfindung liegt daher die Aufgabe zugrunde, den eingangs genannten Schleifkörper so zu verbessern, daß die Abgabe von Formaldehydgas, möglichst weitgehend unterbunden ist.The invention is therefore based on the object of improving the grinding body mentioned at the outset in such a way that the release of formaldehyde gas is prevented as far as possible.

Bei einem Schleifkörper zur Verwendung beim Gleitschleifen, der aus Schleifkörnern, aus Siliziumkarbid, Quarzsand od. dgl. und gehärtetem Harnstoff-Formaldehydharz als Bindemittel besteht, ist gemäß der Erfindung dazu vorgesehen, daß er neben den — bezogen auf sein Gewicht — etwa 30 bis max. 50% Schleifkörnern und 50 bis 70% Harnstoff-Formaldehydharz noch freien Harnstoff enthält.In the case of an abrasive body for use in vibratory grinding, made of abrasive grains, made of silicon carbide, Quartz sand or the like and hardened urea-formaldehyde resin as a binder, is according to the Invention provided that in addition to - based on its weight - about 30 to a maximum of 50% Abrasive grains and 50 to 70% urea-formaldehyde resin still contains free urea.

Die »freien« Harnstoffkristalle bzw. das eingeschlossene Harnstoffpulver absorbiert mindestens einen Teil ?der sonst ,ungehindert entweichenden Formaldehydgase, so daß 'die bisherige unangenehme Belästigung der Atrnungswege bei der Benutzung des Schleifkörpers entfälltThe "free" urea crystals or the enclosed urea powder absorb at least a part ? the otherwise unhindered escape of formaldehyde gases, so that 'the previous unpleasant annoyance of the Atrnungswege when using the grinding wheel not applicable

, Bei der Herstellung des erfindungsgemäßen Schleifkörpers empfiehlt es sich, eine Mischung aus ungehärtetem Harnstoff-Formaldehydharz und einem Härter zu verwenden, die sich dadurch auszeichnet, daß sie — bezogen auf ihr Gewicht — etwa 5 bis 15%, jedenfalls aber mehr freien Harnstoff enthält, als er später im Schleifkörper tatsächlich vorhanden ist Dadurch wird auch die Herstellung des erfindungsgemäßen Schleifkörpers frei von Geruchsbelästigungen durch Formaldehydgas. During the production of the abrasive article according to the invention it is advisable to use a mixture of uncured urea-formaldehyde resin and a hardener use, which is characterized by the fact that they - based on their weight - about 5 to 15%, at least but contains more free urea than will actually be present later in the grinding wheel also the production of the grinding wheel according to the invention free from odor nuisance caused by formaldehyde gas.

Claims (2)

Patentansprüche:Patent claims: 1. Schleifkörper zur Verwendung beim Gleitschleifen, bestehend aus Schleifkörnern aus Siliziumkarbid, Quarzsand oder dergleichen und gehärtetem Harnstoff-Formaldehydharz als Bindemittel, dadurch gekennzeichnet, daß er neben den — bezogen auf sein Gewicht — etwa 30 bis maximal 50% Schleifkörner und 50 bis 70% Harnstoff-Formaldehydharz noch freien Harnstoff enthält1. Abrasives for use in vibratory grinding, consisting of abrasive grains made of silicon carbide, Quartz sand or the like and hardened urea-formaldehyde resin as a binder, thereby characterized that he in addition to - based on his weight - about 30 to a maximum 50% abrasive grains and 50 to 70% urea-formaldehyde resin still contains free urea 2. Mischung zum Herstellen eines Schleifkörpers nach Anspruch 1 aus Schleifkörnern, ungehärtetem Harnstoff-Formaldehydharz und einem Härter, dadurch gekennzeichnet, daß sie — bezogen auf ihr Gewicht — etwa 5 bis 15% freien Harnstoff enthält.2. Mixture for producing an abrasive article according to claim 1 from abrasive grains, uncured Urea-formaldehyde resin and a hardener, characterized in that it - based on her Weight - contains about 5 to 15% free urea. 1010
DE19752538053 1974-08-29 1975-08-27 Abrasives for use in vibratory grinding Ceased DE2538053B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3772074A GB1480096A (en) 1974-08-29 1974-08-29 Plastics abrasive media
GB5483074 1974-12-19

Publications (2)

Publication Number Publication Date
DE2538053A1 DE2538053A1 (en) 1976-03-18
DE2538053B2 true DE2538053B2 (en) 1980-02-21

Family

ID=26263553

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752538053 Ceased DE2538053B2 (en) 1974-08-29 1975-08-27 Abrasives for use in vibratory grinding

Country Status (1)

Country Link
DE (1) DE2538053B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4349327A (en) * 1980-12-04 1982-09-14 Roto-Finish Company, Inc. Automatic finishing chip maker
FR2589884A1 (en) * 1985-11-08 1987-05-15 Bricard Process for the surface treatment of articles made of iron or ferrous alloy
IT1252328B (en) * 1991-07-18 1995-06-08 Rollwasch Italiana Spa AGGLOMERATED ABRADENT DEVICE PARTICULARLY FOR TUMBLING AND SIMILAR AS WELL AS REALIZATION PROCEDURE.
DE102006047442B3 (en) * 2006-09-20 2008-04-10 Walther Trowal Gmbh & Co. Kg Slip-grinding tool i.e. rotational solid, for workpiece, has base surface provided opposite to round point, and cone section connected to round point with cone angle, where cone section arises from large-diameter socket
DE102018010347B3 (en) 2018-09-11 2020-06-04 Franz Gruber Vibratory grinding wheel
DE102018007188B4 (en) 2018-09-11 2021-07-08 Franz Gruber Vibratory grinding media

Also Published As

Publication number Publication date
DE2538053A1 (en) 1976-03-18

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Legal Events

Date Code Title Description
8235 Patent refused