EP3741509A1 - Schleifteller - Google Patents

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Publication number
EP3741509A1
EP3741509A1 EP20175166.6A EP20175166A EP3741509A1 EP 3741509 A1 EP3741509 A1 EP 3741509A1 EP 20175166 A EP20175166 A EP 20175166A EP 3741509 A1 EP3741509 A1 EP 3741509A1
Authority
EP
European Patent Office
Prior art keywords
flange
backing pad
base
edge
engaged
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.)
Pending
Application number
EP20175166.6A
Other languages
English (en)
French (fr)
Inventor
Daniele Corcos
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.)
Corcos SRL
Original Assignee
Corcos SRL
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 Corcos SRL filed Critical Corcos SRL
Publication of EP3741509A1 publication Critical patent/EP3741509A1/de
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/08—Circular back-plates for carrying flexible material

Definitions

  • the present invention relates to a tool for sanding surfaces, in particular to backing pads used with said tools.
  • backing pads for sanding or polishing surfaces are used in order to effectively sand surfaces, for example to remove layers of overlying material (such as, for example previous painting, layers of car body filler, etc.).
  • the backing pads comprise a working surface on which an abrasive layer is applied.
  • Said abrasive layer generally consists of a sheet of various thickness having one of the two surfaces consisting of abrasive material.
  • This sheet is applied to the backing pad, which consists of a (usually disc-shaped) body in the middle of which there is, perpendicularly thereto and to the surface opposite to the one on which the abrasive surface is fixed, a shaft adapted to be engaged, for example with the corresponding connection means of a rotating spindle of a polisher.
  • Said shaft may be fixed to the backing pad or may be removable and adapted to be engaged both with the backing pad and with the aforesaid spindle of a polisher.
  • the abrasive sheet adheres to the backing pad by means of specific mutual engagement means arranged on the surface of the sheet opposite to the abrasive surface, and on the surface of the backing pad opposite to the one facing the spindle of the polisher.
  • the engagement between backing pad and abrasive part is to be such as to allow the perfect adhesion during the sanding, but also an easy removal when the abrasive surface is worn and therefore it is required to remove the abrasive sheet from the backing pad;
  • said engagement means are made, for example by means of adhesive materials, tear-off materials such as VelcroTM, or by means of other similar engagement pressure-fitting materials and materials of the hook-and-loop type.
  • the abrasive sheet is subject to progressive wear and that therefore it is to be replaced with a new abrasive sheet after a given number of sanding operations. It is also clear that due to the frequent replacements of the abrasive sheet, also the engagement means with the abrasive sheet on the surface of the backing pad are subjected to increasing wear up to the point in which it becomes necessary to replace the whole backing pad to ensure the correct adhesion of the abrasive sheet. The wear of the abrasive layer therefore results in the replacement of the whole backing pad to restore the correct functionality of the polisher.
  • a backing pad which comprises two separable parts, a first part, or flange, which forms the main part of the backing pad and is adapted to be connected with the polisher, and a second part, or base, adapted to be reversibly connected to the flange and comprising a surface preferably provided with engagement means made, for example by means of adhesive materials, by means of tear-off materials such as VelcroTM, or other similar pressure-fitting materials of the hook-and-loop type adapted to be connected with the abrasive sheet.
  • Said first part, or flange is made of rigid, resistant and long-lasting materials such as, for example carbon fiber or plastic materials such as, for example nylon.
  • Said second part, or base may advantageously be made of polyurethane or other plastic materials such as, for example foams or rubbers, having the required features of rigidity and hardness. Further, said base may be made of various thicknesses, densities and shapes according to needs.
  • the present invention allows the user to replace only the part (the aforesaid second part, or base) of the employed backing pad subject to wear, while instead keeping and preserving the flange, with obvious benefits in terms of costs, practicality and efficiency of use.
  • said second part, or base, of the backing pad is of the disposable type.
  • the abrasive sheet may also be connected to the base of the backing pad in a reversible manner by means of, for example gluing.
  • the present description therefore aims to reach the above-described objects by means of a sanding backing pad, said backing pad comprising a first part, or flange, which forms the main part of the backing pad and is adapted to be connected with the polisher or equivalent tool, and a second part, or base, adapted to be reversibly connected to the flange and comprising a surface preferably provided with engagement means made, for example by means of adhesive materials, by means of tear-off materials such as VelcroTM, or by means of other similar pressure-fitting materials and materials of the hook-and-loop type for the connection to the abrasive sheet.
  • the aforesaid first part, or flange is adapted to be connected with the polisher or equivalent tool, for example by means of a shaft configured to be engaged with a corresponding spindle of the motor of said polisher or equivalent tool.
  • Said shaft may be fixed to the flange or may be removable and adapted to be engaged both with the flange and with the aforesaid spindle of a polisher.
  • An apparent advantage of the backing pad according to the present description is given by the increased flexibility of employment and by the improved efficiency of use because the presence of the aforesaid removable second part, or base, allows the replacement of the worn part of the backing pad alone, thus increasing the duration of life of the backing pad itself.
  • Figure 1 shows an exploded view of a backing pad according to an embodiment of the invention, the backing pad as a whole indicated with reference numeral 10.
  • the backing pad 10 comprises a flange 20 and a base 30 which is reversibly connectable to said flange 20 and is further adapted to be connected to an abrasive sheet 40, where the aforesaid abrasive sheet 40 comprises a surface consisting of abrasive material on one side and means for the connection to said base 30 on the other side.
  • Flange 20 is adapted to be connected with the polisher, or equivalent tool, for example by means of a shaft 22 configured to be engaged with a corresponding spindle of the motor of said polisher.
  • Said shaft 22 may be fixed to flange 20 or may be removable and adapted to be engaged both with the flange and with the aforesaid spindle of a polisher.
  • Base 30 may be fixed to the abrasive sheet 40 by means of reversible means (comprising, for example layers of adhesive materials, tear-off materials such as VelcroTM, or other similar pressure-fitting materials and materials of the hook-and-loop type) or irreversible means (such as, for example a layer of glue) of known type.
  • reversible means comprising, for example layers of adhesive materials, tear-off materials such as VelcroTM, or other similar pressure-fitting materials and materials of the hook-and-loop type
  • irreversible means such as, for example a layer of glue
  • base 30 is removably connectable to flange 20 also allows easy disassembly and replacement operations of a worn abrasive sheet 40 or of the whole base 30 without removing flange 20 from the spindle of the polisher.
  • the removable-type connection of base 30 to flange 20 may be obtained in various manners.
  • base 30 is connectable to flange 20 by means of the engagement of a plurality of teeth 35 obtained on base 30, with corresponding recesses 25 obtained in flange 20.
  • the shape of each of the teeth 35 is such as to provide a seat 38 inside of which the edge of flange 20 is engaged, as shown in detail in Figure 3 .
  • Figure 4 shows a backing pad 10 according to an alternative embodiment of the invention.
  • base 30 is connectable to flange 20 by means of the engagement of flange 20 in a groove 33 of base 30.
  • the engagement of flange 20 in a groove 33 of base 30 occurs by means of the alignment between the protrusions 37 obtained on the edge of base 30 and the corresponding recesses 25 obtained in flange 20. After the aforesaid alignment, a pressure applied on flange 20 allows the edge of flange 20 to be engaged with the groove 33 of base 30. Protrusion 39 allows flange 20 to be retained in operating position, with the edge accommodated in the groove 33 of base 30.
  • Figure 5 shows a backing pad according to a further embodiment of the invention.
  • base 30 is connectable to flange 20 by means of a thread 26 obtained on the outer edge of said flange 20 and adapted to be engaged with a corresponding thread 36 obtained on an edge of base 30.
  • the assembly and disassembly of base 30 therefore occurs by screwing or unscrewing said base 30 along the aforesaid thread.
  • the second part, or base, 30 of the backing pad is of the disposable type.
  • the abrasive sheet may also be connected to base 30 of the backing pad in a reversible manner by means of, for example gluing.
  • the backing pad according to the present description may advantageously be made of plastic material.
  • said first part, or flange, 20 may be made of rigid, resistant and long-lasting materials, including plastic materials such as, for example nylon, or materials of other type such as, for example carbon fiber.
  • Base 30 may be made of polyurethane, foam or rubber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP20175166.6A 2019-05-17 2020-05-18 Schleifteller Pending EP3741509A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000006956A IT201900006956A1 (it) 2019-05-17 2019-05-17 Platorello per carteggiatura

Publications (1)

Publication Number Publication Date
EP3741509A1 true EP3741509A1 (de) 2020-11-25

Family

ID=67734768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20175166.6A Pending EP3741509A1 (de) 2019-05-17 2020-05-18 Schleifteller

Country Status (2)

Country Link
EP (1) EP3741509A1 (de)
IT (1) IT201900006956A1 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174258A (en) * 1962-12-24 1965-03-23 American Felt Co Glass polishing tool
FR2001288A1 (de) * 1968-02-03 1969-09-26 Para Silvio
DE3633946A1 (de) * 1986-10-04 1988-04-14 Koltec Ag Haltekoerper fuer werkzeugblaetter
EP0904896A2 (de) * 1997-09-29 1999-03-31 Yanase Kabushiki Kaisha Rotierende Einspannvorrichtung zum Schleifen
US20070167119A1 (en) * 2006-01-19 2007-07-19 Mitsukazu Momosaki Mounting system for grinding wheels and the like
WO2011021087A1 (en) * 2009-08-17 2011-02-24 Cemom-Moatti S.A. Support for abrasive elements in sheet form for tools or machine tools
US10040170B2 (en) * 2016-03-02 2018-08-07 Perry D. Bechthold Rotary sanding system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174258A (en) * 1962-12-24 1965-03-23 American Felt Co Glass polishing tool
FR2001288A1 (de) * 1968-02-03 1969-09-26 Para Silvio
DE3633946A1 (de) * 1986-10-04 1988-04-14 Koltec Ag Haltekoerper fuer werkzeugblaetter
EP0904896A2 (de) * 1997-09-29 1999-03-31 Yanase Kabushiki Kaisha Rotierende Einspannvorrichtung zum Schleifen
US20070167119A1 (en) * 2006-01-19 2007-07-19 Mitsukazu Momosaki Mounting system for grinding wheels and the like
WO2011021087A1 (en) * 2009-08-17 2011-02-24 Cemom-Moatti S.A. Support for abrasive elements in sheet form for tools or machine tools
US10040170B2 (en) * 2016-03-02 2018-08-07 Perry D. Bechthold Rotary sanding system

Also Published As

Publication number Publication date
IT201900006956A1 (it) 2020-11-17

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