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EP0005161A2 - Fixation d'une feuille abrasive sur un disque de polissage - Google Patents

Fixation d'une feuille abrasive sur un disque de polissage Download PDF

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Publication number
EP0005161A2
EP0005161A2 EP79100824A EP79100824A EP0005161A2 EP 0005161 A2 EP0005161 A2 EP 0005161A2 EP 79100824 A EP79100824 A EP 79100824A EP 79100824 A EP79100824 A EP 79100824A EP 0005161 A2 EP0005161 A2 EP 0005161A2
Authority
EP
European Patent Office
Prior art keywords
sanding
sheet
adhesive
layer
plate
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
EP79100824A
Other languages
German (de)
English (en)
Other versions
EP0005161B1 (fr
EP0005161A3 (en
Inventor
Miksa Marton
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.)
Individual
Original Assignee
Individual
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 CA302,741A external-priority patent/CA1078620A/fr
Priority claimed from DE19782820370 external-priority patent/DE2820370C2/de
Application filed by Individual filed Critical Individual
Publication of EP0005161A2 publication Critical patent/EP0005161A2/fr
Publication of EP0005161A3 publication Critical patent/EP0005161A3/xx
Application granted granted Critical
Publication of EP0005161B1 publication Critical patent/EP0005161B1/fr
Expired 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
    • B24D9/085—Devices for mounting sheets on a backing plate

Definitions

  • the invention relates to a method for releasably attaching sanding sheets to sanding pads, in particular to easily deformable, rotatingly driven sanding pads, by applying an adhesive layer which adheres to the face of the sanding pad and the back surface of the sanding sheet.
  • the sanding sheet is fastened by gluing. It is known to apply or spray adhesive onto the back of the sanding sheet and onto the end face of the sanding plate and to apply the sanding sheet by pressing it on. It is also known, in order to free the user from having to hold and apply the adhesive, to coat the sanding sheet from the outset with an adhesive layer which is covered by a waxed or siliconized paper to which the adhesive does not adhere.
  • the sanding sheet After removing the paper, the sanding sheet can be pressed onto the sanding plate. Disadvantages of this method were that the adhesive was often very thin in order to maintain its adhesive properties over a long period of time when the sanding sheets were stored, and that it was not when the sanding disc was dusty and the adhesive force was additionally reduced by the dust develops sufficient adhesive effect. It is therefore this process that has completely disappeared from practice. Finally, it is also known to use an adhesive carrier. For this purpose, a linen disc, the diameter of which was equal to the diameter of the sanding plate, was impregnated with glue from both sides and covered from both sides with wax paper or siliconized paper.
  • a contact adhesive is sprayed onto the sanding plate and the contact sheet is placed on the sanding plate and glued.
  • the disadvantage here is that the sanding sheet, which often consists of only a relatively thin and not very strong paper as a carrier for cost reasons, is torn when it is removed and remnants of the paper stick to the sanding plate. It also happens with these sanding sheets that they double during operation because the adhesive is not solidified but remains viscous and the sanding sheet is relatively lobed.
  • the sanding sheet remains on the sanding disc when work is interrupted, for example overnight or over the weekend, it can no longer be removed completely and tears due to the hardening which has now taken place. Even the heating of the adhesive layer, which is inconvenient for the user, does not yet guarantee a complete and relatively quick removal of the sanding sheet when it is worn.
  • the object of the present invention is to provide a sanding sheet and a method for attaching it to a sanding plate, which overcomes the disadvantages mentioned above and which therefore allows the sanding sheet to be fastened to the sanding plate quickly and reliably by gluing, but it does again, can be removed quickly without tearing, in order to achieve economical work while making good use of the abrasive capacity of the sanding sheet.
  • This object is achieved according to the invention in a method of the type mentioned at the outset by providing the back of the abrasive sheet with a layer with which the adhesive has only reduced adhesion, withstanding the large forces lying in the plane of the adhesive layer and perpendicularly to only lower forces can
  • the object of the invention is achieved and the disadvantages explained above are overcome in a surprisingly simple manner in one fell swoop.
  • the handling is very easy for the user, because it is sufficient for him to put the previously prepared sanding sheets, which do not adhere to each other and do not require a protective layer, on the one-time and thus sufficient abrasive disc surface provided for a longer period of time. It is very easy to remove the worn sanding sheet by pulling it off, taking care that the direction of pull is approximately perpendicular to the plane of the end face of the sanding plate.
  • the separating layer also additionally stiffens the sanding sheet, which ensures in any case that the sanding sheet does not tear even when removed relatively quickly.
  • the sanding sheet can be easily completely remove from the sanding plate, then all problems that have occurred since then due to remaining parts of the sanding sheet remaining on the sanding plate will also disappear.
  • the invention relates not only to a method for releasably attaching sanding sheets to sanding pads, but also relates to an sanding sheet for releasably attaching to a sanding pad, in particular a flexible sanding pad to be driven in rotation, on the end face of which an adhesive layer is applied, on which the sanding sheet applied is liable.
  • the disadvantages of this known arrangement have already been described.
  • the task to be solved is to design sanding sheets so that they correspond
  • an abrasive sheet of the aforementioned type in that the back of the abrasive sheet is provided with a separating layer adhering firmly to the abrasive sheet, to which the adhesive on the abrasive disc adheres to such an extent that the abrasive sheet is exposed to forces occurring in its plane is held reliably, but on the other hand, by applying forces that have a component perpendicular to the grinding plate plane, can be detached from the grinding plate as a whole by peeling.
  • the separating layer is designed in such a way that the adhesion of the adhesive to the separating layer is so low that when the abrasive sheet is peeled off or peeled off, the adhesive remains completely or almost completely on the abrasive plate.
  • This has the advantage that the adhesive only has to be added or replaced relatively rarely.
  • Another advantage is that the sanding sheet even after long breaks and even can be peeled off unchanged even after days or weeks because it forms a tight seal for the adhesive layer, which, if an adhesive is selected appropriately, prevents this adhesive from drying out.
  • a contact adhesive that does not harden or only hardens over a long period of time is used as the adhesive.
  • an adhesive is used, such as that sold by 3M (Minnesota Mining and Manufactoring) under the name Auto Adhesive 8054 E.
  • the separating layer can be designed in very different ways.
  • a polyvinyl acetate copolymer is used as the separating layer, which connects indissolubly to the paper or the fabric of the sanding sheet and which can be applied by rolling up, brushing on, spraying on or the like.
  • This material which penetrates the paper or fabric of the sanding sheet, results in a smooth, reflective top layer. Not only can it be detached from the adhesive-coated sanding pad without adhesive adhering to it, but it also causes the relatively thin and lobed paper of the sanding sheet, which is often used as the backing material, to solidify and stiffen, which carries the abrasive grain on the opposite surface.
  • the separating layer can also be constructed completely differently.
  • a fabric, fleece or mesh covering is used as the separating layer, which is connected to the paper or fabric of the sanding sheet.
  • This pad can consist of plastic as well as natural material.
  • the overlay can also be provided with polyvinyl acetate copolymer as a top layer, although this is generally not necessary.
  • a hardening but elastically deformable permanent adhesive is used to connect the pad to the sanding sheet. Such an adhesive has proven itself in practical use for the permanent connection of the flexible support to the paper of the sanding sheet.
  • the support can consist of natural fibers or also of synthetic fibers, in particular of polyamide.
  • the overlay can also consist of a nonwoven nonwoven coating.
  • the adhesive for connecting the fleece pad to the sanding sheet is applied so thick that the fleece is soaked.
  • the intrinsically low tensile strength of the nonwoven is increased so much that it behaves similarly to a heavy-duty fabric and gives the sanding sheet high flexibility with good tensile strength.
  • the costs for such a nonwoven are so low that they only increase the manufacturing costs of an abrasive sheet coated with it so insignificantly that the application-related advantages and cost savings are many times over.
  • the drawing shows a highly schematic axial section through a sanding plate and a sanding sheet which is pulled off in an edge area, while in the remaining areas it still adheres to the sanding plate.
  • the grinding plate 1 On a sanding plate 1, an abrasive sheet 2 is detachably attached by gluing.
  • the grinding plate 1 comprises a cylindrical, relatively thick layer 3 made of a relatively large-pored and therefore easily deformable foam.
  • this layer 3 On the end face facing away from the sanding sheet 2, this layer 3 is permanently attached to a rigid cover plate 4 made of plastic, for example glued or vulcanized.
  • the cover plate 4 is provided with a projection 5, into which a metallic threaded sleeve 6 is inserted, into which a screw spindle end of a drive motor can be screwed.
  • a thin, relatively fine-pored and, like the layer 3, flexible, sponge-like cover layer 7 is applied to the layer 3, onto which non-hardening contact adhesive 8 is applied, which has partially penetrated into the sponge-like structure of the cover layer 7.
  • the layer of contact adhesive 8, which is a largely continuous and uniformly strong layer when the abrasive sheet 2 is attached and which, after the abrasive sheet 2 has been detached, is in the form of droplets, insofar as it is barely visible by suction into the cover layer 7, which forms Detachable connection between the sanding plate 1 and the sanding sheet 2.
  • the abrasive sheet 2 consists of a backing layer 9, which can consist of a fabric, but which preferably consists of a relatively thin paper, on one surface of which a grain 10 is applied as an active abrasive layer.
  • a net or a fabric is applied to the surface of the carrier layer 9.
  • the carrier layer 9 and the support 11 are preferably permanently connected to one another by gluing. Instead of the support 11, the carrier layer 9 on the rear side facing away from the grain 10 can also be replaced by applying a layer of polyvinyl acetate copolymer. Both the pad 11 and the corresponding layer of polyvinyl acetate copolymer result in a considerable mechanical reinforcement of the sanding sheet 2.
  • the abrasive sheet 2 is reliably held on the abrasive disc 1 by the connecting layer of contact adhesive 8 to withstand all the stresses that occur during grinding, because the stresses that occur act essentially in the direction of the plane of the layers.
  • the edge is detected and a force is applied in the direction of an arrow 12, which has an essential component perpendicular to the plane of the layers, whereby the sanding sheet 2 can be separated from the sanding plate 1 in the manner indicated, in each case Separation area briefly form threads 13 from contact adhesive 8 until the contact adhesive separates from the support 11.
  • no or very little contact adhesive remains on pad 11 after separation.
  • the thickness of the layer of contact adhesive 8 is substantially less than that shown in the drawing, so that the carrier layer 9 is located in the immediate vicinity of the cover layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP19790100824 1978-05-05 1979-03-19 Fixation d'une feuille abrasive sur un disque de polissage Expired EP0005161B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CA302741 1978-05-05
CA302,741A CA1078620A (fr) 1978-05-05 1978-05-05 Disque auto-collant pour poncage
DE19782820370 DE2820370C2 (de) 1978-05-10 1978-05-10 Schleifblatt
DE2820370 1978-05-10

Publications (3)

Publication Number Publication Date
EP0005161A2 true EP0005161A2 (fr) 1979-11-14
EP0005161A3 EP0005161A3 (en) 1979-11-28
EP0005161B1 EP0005161B1 (fr) 1982-01-13

Family

ID=25668694

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790100824 Expired EP0005161B1 (fr) 1978-05-05 1979-03-19 Fixation d'une feuille abrasive sur un disque de polissage

Country Status (4)

Country Link
EP (1) EP0005161B1 (fr)
AT (1) AT359387B (fr)
BR (1) BR7902710A (fr)
DK (1) DK146956C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0081120A3 (en) * 1981-12-08 1985-04-10 Gerd Braasch Method of adhering abrasive material to an abrasive body
EP0465770A1 (fr) * 1990-06-27 1992-01-15 Gerd Eisenblätter GmbH Outil de meulage frontal à lamelles
WO1998030359A1 (fr) * 1997-01-13 1998-07-16 Struers A/S Element de fixation et son utilisation pour fixer un element d'abrasion ou de polissage sous forme de feuille sur un support magnetise
WO2000013854A1 (fr) * 1998-09-08 2000-03-16 Struers A/S Support pour fixation temporaire d'une feuille de polissage et/ou d'une feuille abrasive autocollante sur une butee mobile dans un appareil de polissage et/ou abrasion

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE20946E (en) * 1938-12-13 Abrasive article
DE537578C (de) * 1930-04-08 1931-11-04 Fritz Szepanscky Dipl Ing Verfahren zum Befestigen von Mitteln zur Oberflaechenbehandlung, z. B. Schleifbelaegen aus Schmirgelleinen, auf ihrer Unterlage
US2279673A (en) * 1940-05-25 1942-04-14 Delmar E Meyer Grinding disk
GB1126136A (en) * 1966-06-20 1968-09-05 American Velcro Inc Improvements in abrasive pad holding device
US3510992A (en) * 1967-08-18 1970-05-12 Alma A Hutchins Backing pad for sanding discs
US3522681A (en) * 1968-12-18 1970-08-04 Gerald Lampert Rubbing apparatus
FR2301334A1 (fr) * 1975-02-19 1976-09-17 Mermillod Jean Perfectionnements a l'etablissement de disques de polissage et analogues

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0081120A3 (en) * 1981-12-08 1985-04-10 Gerd Braasch Method of adhering abrasive material to an abrasive body
EP0465770A1 (fr) * 1990-06-27 1992-01-15 Gerd Eisenblätter GmbH Outil de meulage frontal à lamelles
WO1998030359A1 (fr) * 1997-01-13 1998-07-16 Struers A/S Element de fixation et son utilisation pour fixer un element d'abrasion ou de polissage sous forme de feuille sur un support magnetise
WO2000013854A1 (fr) * 1998-09-08 2000-03-16 Struers A/S Support pour fixation temporaire d'une feuille de polissage et/ou d'une feuille abrasive autocollante sur une butee mobile dans un appareil de polissage et/ou abrasion
US6607429B1 (en) 1998-09-08 2003-08-19 Struers A/S Support for temporary fixation of self-sticking abrasive and/or polishing sheet

Also Published As

Publication number Publication date
AT359387B (de) 1980-11-10
EP0005161B1 (fr) 1982-01-13
DK146956B (da) 1984-02-27
DK122479A (da) 1979-11-06
ATA153379A (de) 1980-03-15
DK146956C (da) 1984-08-13
BR7902710A (pt) 1979-11-27
EP0005161A3 (en) 1979-11-28

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