EP0005161B1 - Befestigung eines Schleifblattes an einem Schleifteller - Google Patents
Befestigung eines Schleifblattes an einem Schleifteller Download PDFInfo
- Publication number
- EP0005161B1 EP0005161B1 EP19790100824 EP79100824A EP0005161B1 EP 0005161 B1 EP0005161 B1 EP 0005161B1 EP 19790100824 EP19790100824 EP 19790100824 EP 79100824 A EP79100824 A EP 79100824A EP 0005161 B1 EP0005161 B1 EP 0005161B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- abrasive sheet
- layer
- adhesive
- accordance
- backup pad
- 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.)
- Expired
Links
- 239000010410 layer Substances 0.000 claims description 37
- 239000000853 adhesive Substances 0.000 claims description 14
- 230000001070 adhesive effect Effects 0.000 claims description 14
- 239000004744 fabric Substances 0.000 claims description 12
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 8
- 239000011118 polyvinyl acetate Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 239000012790 adhesive layer Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- 239000004745 nonwoven fabric Substances 0.000 claims 3
- 230000000717 retained effect Effects 0.000 claims 1
- 238000003892 spreading Methods 0.000 claims 1
- 239000002759 woven fabric Substances 0.000 claims 1
- 239000004821 Contact adhesive Substances 0.000 description 8
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 239000012876 carrier material Substances 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
Images
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 sanding sheet for releasably attaching to a sanding plate, in particular a flexible, rotating driven sanding plate, on the front side of which a non-rapidly curing adhesive layer is applied, to which the applied sanding sheet adheres to such an extent that it adheres to the forces occurring in its plane is reliably held, but on the other hand can be detached from the grinding plate as a whole by peeling by forces directed perpendicular to the plane of the grinding plate, the adhesion of the adhesive to the sanding sheet being so low that when the sanding sheet is peeled off from the grinding plate, the adhesive is completely or almost completely attached to it Grinding plate remains.
- a known sanding sheet of this type (US Pat. No. 3,510,992) is releasably attached to the end face of a sanding plate by means of a non-rapidly hardening adhesive which consists of a closed-cell foam rubber.
- the end face of the sanding plate is provided with projections lying in one plane, to which only the sanding sheet adheres and which covers the depressions surrounding the projections.
- the sanding sheet can be peeled off as a whole.
- the prerequisite for this, however, is that the sanding sheet is made from a sufficiently stable and tear-resistant paper or fabric. As a result, however, the cost of the sanding sheets is considerable and, since it is a wear item, is significant.
- the object of the present invention is to improve a sanding sheet of the type mentioned in such a way that on the one hand it can be produced inexpensively and inexpensively from a cheap, lobed paper as a carrier material for the grit, and yet it can be removed in one piece from the sanding plate after wear .
- an abrasive sheet of the type mentioned at the outset in that the back of the abrasive sheet is provided with a separating layer firmly adhering to it, which is inextricably linked to the paper or fabric of the abrasive sheet and which is made from a polymerized plastic such as polyamide or polyvinyl acetate Copolymer exists.
- the above-described disadvantages are overcome by the abrasive sheet designed in accordance with the invention, and an abrasive sheet is created which is inexpensive to produce, easy to attach and easy to remove, but otherwise remains effective.
- the separating layer can be applied very simply by rolling up, spraying on, brushing on or the like.
- the material of the separating layer penetrates into the paper or tissue of the sanding sheet and results in a smooth, reflective layer, to which practically no adhesive adheres when the sanding sheet is peeled off from the sanding plate, but rather remains on the sanding plate.
- the separating layer has the very desired effect of strengthening the carrier material of the grain, which enables the desired use of thin, lobed papers.
- 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 a polyvinyl acetate copolymer as a covering layer, although this is generally not necessary.
- a hardening but elastically deformable permanent adhesive is used to connect the pad to the abrasive sheet. Such an adhesive has found practical use well proven for permanent connection of the flexible pad with the paper of the sanding sheet.
- the support can consist of natural fibers or also of synthetic fibers, in particular of polyamide. It can also be provided, as with other Ausbowun g s-shapes, however, are made from a non volvon Najivliesbe harshung the support.
- 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 them so insignificantly that the application-related advantages and cost savings are many times as much.
- 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 it still adheres to the sanding plate in the remaining areas.
- 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.
- the cover plate 4 is provided in its central region 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 layer 3, flexible, sponge-like cover layer 7 is attached to the cover plate 4 on the end face, 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 is in the form of droplets after the abrasive sheet 2 has been detached, 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 grinding sheet 2 consists of a backing layer 9, which can consist of a fabric, but which preferably consists of a relatively thin paper, on the surface of which a grit 10 is applied as an active abrasive layer.
- a pad 11 made of a fleece, a net or a fabric is applied.
- the carrier layer 9 and the support 11 are inseparably connected to one another by gluing.
- a layer of polyvinyl acetate copolymer can also be applied to the carrier layer 9 on the rear side facing away from the grain 10. Both the pad 11 and the corresponding layer of polyvinyl acetate copolymer result in a considerable mechanical reinforcement of the sanding sheet 2.
- the sanding sheet 2 is reliably held on the sanding plate 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 1.
- no or very little contact adhesive remains on pad 11 after separation.
- the thickness of the layer of the contact adhesive 8 is substantially less than that shown in the drawing, so that the carrier layer 9 is in the immediate vicinity of the cover layer 7.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA302741 | 1978-05-05 | ||
| CA302,741A CA1078620A (en) | 1978-05-05 | 1978-05-05 | Stick-on sanding disc |
| DE19782820370 DE2820370C2 (de) | 1978-05-10 | 1978-05-10 | Schleifblatt |
| DE2820370 | 1978-05-10 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0005161A2 EP0005161A2 (de) | 1979-11-14 |
| EP0005161A3 EP0005161A3 (en) | 1979-11-28 |
| EP0005161B1 true EP0005161B1 (de) | 1982-01-13 |
Family
ID=25668694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19790100824 Expired EP0005161B1 (de) | 1978-05-05 | 1979-03-19 | Befestigung eines Schleifblattes an einem Schleifteller |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0005161B1 (da) |
| AT (1) | AT359387B (da) |
| BR (1) | BR7902710A (da) |
| DK (1) | DK146956C (da) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3148499A1 (de) * | 1981-12-08 | 1983-06-23 | Gerd 4475 Sögel Braasch | Verfahren zum kleben von schleifmaterial auf einen schleifkoerper |
| DE4020461C1 (en) * | 1990-06-27 | 1991-07-18 | Gerd Eisenblaetter Gmbh, 8192 Geretsried, De | Face grinding disc tool - has replaceable grinding disc with backing disc having plastics rods |
| FR2758285B3 (fr) * | 1997-01-13 | 1998-12-04 | Struers As | Procede de fixation d'un agent abrasif ou de polissage, sous forme de feuille, sur un support magnetique |
| EP1112147B1 (en) * | 1998-09-08 | 2002-05-22 | Struers A/S | Support for temporary fixation of a self-sticking abrasive and/or polishing sheet |
Family Cites Families (7)
| 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 |
-
1979
- 1979-03-01 AT AT153379A patent/AT359387B/de not_active IP Right Cessation
- 1979-03-19 EP EP19790100824 patent/EP0005161B1/de not_active Expired
- 1979-03-26 DK DK122479A patent/DK146956C/da not_active IP Right Cessation
- 1979-05-04 BR BR7902710A patent/BR7902710A/pt unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BR7902710A (pt) | 1979-11-27 |
| AT359387B (de) | 1980-11-10 |
| ATA153379A (de) | 1980-03-15 |
| EP0005161A2 (de) | 1979-11-14 |
| DK146956B (da) | 1984-02-27 |
| EP0005161A3 (en) | 1979-11-28 |
| DK146956C (da) | 1984-08-13 |
| DK122479A (da) | 1979-11-06 |
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