EP0242410A1 - Procédé de fabrication d'un élément abrasif élastique - Google Patents

Procédé de fabrication d'un élément abrasif élastique Download PDF

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Publication number
EP0242410A1
EP0242410A1 EP86105309A EP86105309A EP0242410A1 EP 0242410 A1 EP0242410 A1 EP 0242410A1 EP 86105309 A EP86105309 A EP 86105309A EP 86105309 A EP86105309 A EP 86105309A EP 0242410 A1 EP0242410 A1 EP 0242410A1
Authority
EP
European Patent Office
Prior art keywords
grinding
layer
negative mold
abrasive grain
abrasive
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
EP86105309A
Other languages
German (de)
English (en)
Other versions
EP0242410B1 (fr
Inventor
Karl Dr. Elbel
Gottfried Wachter
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.)
CARBORUNDUM SCHLEIFMITTELWERKE GMBH
Original Assignee
Carborundum Schleifmittelwerke GmbH
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 Carborundum Schleifmittelwerke GmbH filed Critical Carborundum Schleifmittelwerke GmbH
Priority to DE8686105309T priority Critical patent/DE3671712D1/de
Priority to EP86105309A priority patent/EP0242410B1/fr
Priority to AT86105309T priority patent/ATE53324T1/de
Publication of EP0242410A1 publication Critical patent/EP0242410A1/fr
Application granted granted Critical
Publication of EP0242410B1 publication Critical patent/EP0242410B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the application relates to a method for producing an elastic grinding body for shape-following grinding, which consists of a carrier layer and an active grinding layer applied thereon from free-standing grinding knobs made of a binder-grinding grain mixture, using a negative mold which can be inserted into a support part to produce the grinding active layer.
  • Abrasive bodies of the type mentioned are known, for example, from EP-A 0095 055 and EP-A 0114 280.
  • the abrasive bodies produced in this way have the disadvantage, among other things, that after the abrasive layer has worn out, the rest of the body (core with the elastomer layer lying thereon) has at least partially become unusable. It therefore follows that approximately 80 to 90 percent by weight of the abrasive is lost and must be sent to a corresponding landfill. This serious deficiency is also present in the grinding belts used to date and those known grinding wheels for shape-following grinding, which contain hard-bonded abrasive grain conglomerates embedded in an elastomeric matrix.
  • the object of the invention is therefore to provide a method with which such abrasive bodies can be produced more easily and better, and residual bodies (core with elastomer layer) can be re-coated after the abrasive grain layer has worn out.
  • this object is achieved in that the annular support part with the negative form is arranged over a base body formed from a core and the carrier layer applied thereon, in such a way that the lower inner edges of the negative form coincide with the outer upper edge of the carrier layer, starting with The depressions at the bottom of the negative mold are poured out with the binder-abrasive grain mixture, the negative mold being lowered continuously or step by step to such an extent that the filled-in depressions are closed by the backing layer, and after the binder-abrasive grain mixture has hardened, the supporting part is cured the negative form is removed from the grinding-active layer produced in this way.
  • the idea of the invention is therefore that the cores of the grinding wheels with the elastomer layer can be used several times, so that, in addition to reducing the grinding costs, a lower environmental impact is achieved by grinding wheel cores that can no longer be used.
  • the abrasive grain-binder mixture is structurally viscous and is vibrated to pour out the recesses of the negative mold and is thereby liquefied, and it is further provided that a fabric pad is applied to the carrier layer before filling with the binder abrasive grain mixture.
  • the fabric cover can expediently consist of two coils of a tear-resistant, synthetic fabric which is firmly connected to the base body with a suitable elastomeric binder. After the return of such a body with a worn abrasive layer, the outer of the two fabric wraps is sanded, provided with a fresh fabric wrap and is then available for re-use with an abrasive grain layer.
  • the production of the abrasive grain layer can start from all known abrasive grain binder mixtures, for example also based on epoxy or polyester resin, but it has proven particularly advantageous to use an abrasive grain binder mixture according to EP-A 0 114 280, which can be liquefied by vibration .
  • the active grinding layer can be up to 20 mm high, in contrast to the known methods mentioned above, more than doubling. This results in service lives that are at least the same as those achieved by the known conglomerate disks, but the latter are not only more complex to manufacture, but can also no longer be reapplied after the abrasive layer has worn out and are also not oil-resistant. This results in areas of application for the extraordinarily chemical and oil-resistant abrasive articles which have been produced according to the invention, wherever grinding is carried out with oil, emulsions or semi-synthetic coolants.
  • Figures 1 and 2 show an abrasive body, as it can be produced or regenerated by the inventive method. It is constructed in a wheel shape, its peripheral area is formed by the active grinding layer 11 in the form of grinding knobs which are completely separated from one another so that they move individually on the underlying carrier layer 12 formed from a solid or foamed elastomer, ie the respective grinding surface can adjust. Between the backing layer 12 and the grinding-active layer 11 is a fabric layer 13 provided, which may consist of two fabric wraps, for example.
  • the inner part of the grinding wheel finally consists of a hard core 14 with a central bore 15.
  • the surface design i.e. the cross-sectional design of the grinding nubs of the grinding active layer 11 can be adapted to the particular application of the grinding wheel and, for example, have the shape indicated in FIGS. 3 to 6, the ratio of grinding nubs and interspaces being particularly important for the respective grinding task.
  • the basic idea of the method according to the invention is now not only to apply the outer grinding-active layer 11, that is to say the grinding nubs, for the first time to the base body consisting of carrier layer 12 and core 14, but also to apply it again and again to the base body after its wear, that is to say a " To allow retreading "of the active grinding layer 11.
  • FIGS. 7-9 show the devices provided for carrying out this method; the method according to the invention is now explained with reference to these figures:
  • the basic body consisting of the core 14 with a bore 15 and the carrier layer 12 with the fabric layer 13, is produced by known methods, for example in accordance with the publications mentioned above, and does not need to be explained in particular.
  • a base body 16 (FIG. 7) is first produced from wood, metal, plastic or another suitable material, the surface design of which corresponds to or specifies the surface design of the later grinding-active layer 11, for example accordingly Figures 3-6.
  • the knobs 11A of the base body 16 therefore correspond in shape to the knobs of the active grinding layer 11.
  • This base body thus forms a positive mold that can be used again and again to cast an elastic negative mold 18 therefrom, for example silicone rubber being used as the material for the negative mold 18, which is poured into the space between the base body 16 and an outer annular support part 17 .
  • an elastic negative mold 18 for example silicone rubber being used as the material for the negative mold 18, which is poured into the space between the base body 16 and an outer annular support part 17 .
  • the support ring 17 is pulled off, the negative mold 18 is cut open at one point on its circumference and pulled off the positive mold (base body 16), after which the negative mold 18 is reinserted in the support ring 17 and is now formed to form a (new) active grinding layer on the base body 14 or the carrier layer 12 or the fabric pad 13 available.
  • a cylindrical body is thus obtained with inwardly directed ribs, which enclose depressions 11B between them, which define the later shape of the grinding knobs of the grinding-active layer 11.
  • the support part 17 and the negative mold 18 are fastened on a ring 24.
  • this ring 24 is aligned on the one hand with the inner edges of the webs or ribs 11C remaining between the recesses 11B and on the other hand fits over the base body formed from the core 14, carrier layer 12 and fabric support 13 in the sense that the negative mold 18, support part 17 and retaining ring 24 unit formed can be pushed onto the base body.
  • the base body is clamped on the plate 22 of a vibration table with the aid of a bolt 19, nuts 21 and an auxiliary plate 20 which is guided through the bore 15.
  • the lower peripheral edge of the holding plate 20 corresponds to the upper edge of the negative mold 18, in addition, the holding plate 20 is frustoconical in such a way that a downwardly tapering, annular space is formed between the conical jacket and the negative mold 18, which in the positioning of the two shown in Figure 8 Allows aggregates access to the bottom row of wells 11B.
  • the abrasive grain binder mixture is now distributed into this gap between the auxiliary plate 20 and the negative mold 18 and liquefied by vibration of the vibration table, so that the abrasive grain binder mixture first fills this lowermost row of depressions 11B of the negative mold 18.
  • the negative mold 18 is now lowered with the support part 17, with further refilling of abrasive grain binder mixture 23 (FIG. 9) until all the depressions 11B of the negative mold 18 are filled and these together with the ring 24 in the corresponding annular groove 24A of the table top 22 touches down.
  • the supporting part 17 is first removed and then the negative mold 18 is removed from the now finished abrasive body, in which case the hardened abrasive grain binder mixture 23 then forms the active grinding layer 11 of the finished abrasive body consisting of individual abrasive nubs.
  • the outer layer of the fabric layer 13 can, for example, be abraded, provided with a fresh tissue wrap, and the method can then be used repeatedly for reapplying an abrasive layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP86105309A 1986-04-17 1986-04-17 Procédé de fabrication d'un élément abrasif élastique Expired - Lifetime EP0242410B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8686105309T DE3671712D1 (de) 1986-04-17 1986-04-17 Verfahren zur herstellung eines elastischen schleifkoerpers.
EP86105309A EP0242410B1 (fr) 1986-04-17 1986-04-17 Procédé de fabrication d'un élément abrasif élastique
AT86105309T ATE53324T1 (de) 1986-04-17 1986-04-17 Verfahren zur herstellung eines elastischen schleifkoerpers.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86105309A EP0242410B1 (fr) 1986-04-17 1986-04-17 Procédé de fabrication d'un élément abrasif élastique

Publications (2)

Publication Number Publication Date
EP0242410A1 true EP0242410A1 (fr) 1987-10-28
EP0242410B1 EP0242410B1 (fr) 1990-06-06

Family

ID=8195069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105309A Expired - Lifetime EP0242410B1 (fr) 1986-04-17 1986-04-17 Procédé de fabrication d'un élément abrasif élastique

Country Status (3)

Country Link
EP (1) EP0242410B1 (fr)
AT (1) ATE53324T1 (fr)
DE (1) DE3671712D1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0688635A1 (fr) * 1994-05-23 1995-12-27 GHINES S.r.l. Meule carclée pour l'usinage des bords de plaques de marbre, granit ou similaire
CN105751086A (zh) * 2016-05-05 2016-07-13 珠海市巨海科技有限公司 金属结合剂磨具及其制造方法
CN109202578A (zh) * 2017-07-05 2019-01-15 常州市岚钨合金有限公司 一种地板的磨砂轮式打磨系统
CN110977798A (zh) * 2018-10-02 2020-04-10 株式会社迪思科 磨削磨轮的制造方法
EP4010160A4 (fr) * 2019-08-07 2023-05-03 Saab Ab Ensemble d'outil de moule

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105729318A (zh) * 2016-05-05 2016-07-06 珠海市巨海科技有限公司 瓷砖素坯抛磨用砂轮与制造方法及抛磨装置、抛磨方法
CN105945738A (zh) * 2016-05-05 2016-09-21 珠海市巨海科技有限公司 树脂结合剂磨具及其制造方法
CN111515872B (zh) * 2020-04-10 2022-01-11 广东大市智能装备有限公司 一种中空金刚石的粉末冶金一体成型方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB498951A (en) * 1937-01-12 1939-01-17 Norton Grinding Wheel Co Ltd Composite grinding wheel and method of making the same
FR1142688A (fr) * 1956-02-15 1957-09-20 Outil abrasif perfectionné et son procédé de fabrication
DE2341329A1 (de) * 1973-08-16 1975-03-13 Wilhelm H Spira Vorrichtung zur feinbearbeitung torischer flaechen
EP0095055A2 (fr) * 1982-05-25 1983-11-30 Dr. Elbel Schleifmittel GmbH Procédé de fabrication d'un corps abrasif
EP0114280A2 (fr) * 1983-01-21 1984-08-01 Carborundum Schleifmittelwerke GmbH Procédé de fabrication d'éléments abrasifs
US4523930A (en) * 1984-08-06 1985-06-18 Norton Company Method of manufacturing composite grinding wheel
EP0147633A2 (fr) * 1983-12-24 1985-07-10 Dr. Elbel Schleifmittel GmbH Procédé de fabrication d'éléments abrasifs élastiques

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB498951A (en) * 1937-01-12 1939-01-17 Norton Grinding Wheel Co Ltd Composite grinding wheel and method of making the same
FR1142688A (fr) * 1956-02-15 1957-09-20 Outil abrasif perfectionné et son procédé de fabrication
DE2341329A1 (de) * 1973-08-16 1975-03-13 Wilhelm H Spira Vorrichtung zur feinbearbeitung torischer flaechen
EP0095055A2 (fr) * 1982-05-25 1983-11-30 Dr. Elbel Schleifmittel GmbH Procédé de fabrication d'un corps abrasif
EP0114280A2 (fr) * 1983-01-21 1984-08-01 Carborundum Schleifmittelwerke GmbH Procédé de fabrication d'éléments abrasifs
EP0147633A2 (fr) * 1983-12-24 1985-07-10 Dr. Elbel Schleifmittel GmbH Procédé de fabrication d'éléments abrasifs élastiques
US4523930A (en) * 1984-08-06 1985-06-18 Norton Company Method of manufacturing composite grinding wheel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0688635A1 (fr) * 1994-05-23 1995-12-27 GHINES S.r.l. Meule carclée pour l'usinage des bords de plaques de marbre, granit ou similaire
CN105751086A (zh) * 2016-05-05 2016-07-13 珠海市巨海科技有限公司 金属结合剂磨具及其制造方法
CN109202578A (zh) * 2017-07-05 2019-01-15 常州市岚钨合金有限公司 一种地板的磨砂轮式打磨系统
CN110977798A (zh) * 2018-10-02 2020-04-10 株式会社迪思科 磨削磨轮的制造方法
EP4010160A4 (fr) * 2019-08-07 2023-05-03 Saab Ab Ensemble d'outil de moule

Also Published As

Publication number Publication date
DE3671712D1 (de) 1990-07-12
ATE53324T1 (de) 1990-06-15
EP0242410B1 (fr) 1990-06-06

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