ITMI20010789A1 - SUPPORT FOR ABRASIVE DISCS AND ABRASIVE DISCS INCLUDING SUCH SUPPORT - Google Patents
SUPPORT FOR ABRASIVE DISCS AND ABRASIVE DISCS INCLUDING SUCH SUPPORT Download PDFInfo
- Publication number
- ITMI20010789A1 ITMI20010789A1 IT2001MI000789A ITMI20010789A ITMI20010789A1 IT MI20010789 A1 ITMI20010789 A1 IT MI20010789A1 IT 2001MI000789 A IT2001MI000789 A IT 2001MI000789A IT MI20010789 A ITMI20010789 A IT MI20010789A IT MI20010789 A1 ITMI20010789 A1 IT MI20010789A1
- Authority
- IT
- Italy
- Prior art keywords
- support
- abrasive
- glass fibers
- abrasive disc
- polyamide
- Prior art date
Links
- 239000003365 glass fiber Substances 0.000 claims description 12
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 5
- 239000003082 abrasive agent Substances 0.000 claims description 4
- 239000004579 marble Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 description 5
- 239000001913 cellulose Substances 0.000 description 5
- 239000000835 fiber Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
- B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
- B24D13/20—Mountings for the wheels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Description
Descrizione di un brevetto per invenzione avente per titolo: Description of a patent for an invention entitled:
“SUPPORTO PER DISCHI ABRASIVI E DISCHI ABRASIVI COMPRENDENTI TALE SUPPORTO” "SUPPORT FOR ABRASIVE DISCS AND ABRASIVE DISCS INCLUDING THIS SUPPORT"
DESCRIZIONE DESCRIPTION
La presente invenzione ha per oggetto un supporto per dischi abrasivi flessibili o semirigidi, particolarmente per la sgrossatura e la levigatura di marmi, pietre, metalli e simili, nonché i dischi abrasivi comprendenti tale supporto. The present invention relates to a support for flexible or semi-rigid abrasive discs, particularly for roughing and polishing marble, stone, metals and the like, as well as abrasive discs comprising this support.
Come è noto, un disco abrasivo del tipo suddetto comprende un supporto sul quale è applicato il granulato abrasivo mediante resinatura. As is known, an abrasive disc of the aforesaid type comprises a support on which the abrasive granulate is applied by means of resin.
Il supporto è normalmente realizzato in fibra vegetale vulcanizzata, interamente o a base di cellulosa. The support is normally made of vulcanized vegetable fiber, entirely or based on cellulose.
In pratica, viene formato un nastro, costituito da strati sovrapposti di cellulosa o carta a base di cellulosa, tra i quali sono interposti strati di collante, fino al raggiungimento dello spessore desiderato. Il nastro così ottenuto viene pressato, essiccato e successivamente avvolto in bobine. Da esso viene poi tranciato il supporto nella forma desiderata, sul quale viene applicato il collante e l’abrasivo, per ottenere un disco abrasivo. In practice, a tape is formed, consisting of superimposed layers of cellulose or cellulose-based paper, between which layers of glue are interposed, until the desired thickness is reached. The strip thus obtained is pressed, dried and subsequently wound on reels. From it the support is then cut into the desired shape, on which the adhesive and the abrasive are applied, to obtain an abrasive disc.
I supporti così realizzati presentano svariati inconvenienti. The supports thus made have various drawbacks.
Innanzitutto essi risultano piuttosto costosi, sia per il costo della materia prima utilizzata, cellulosa, sia per la complessità del procedimento per il loro ottenimento. First of all, they are rather expensive, both for the cost of the raw material used, cellulose, and for the complexity of the process for obtaining them.
Tali supporti in fibra vegetale, e quindi i relativi dischi, soprattutto quelli flessibili di sottile spessore, tendono ad imbarcarsi a contatto con Taria. Per tale motivo essi vengono normalmente confezionati sotto vuoto. These vegetable fiber supports, and therefore the relative discs, especially the flexible thin ones, tend to embark in contact with Taria. For this reason they are normally vacuum packed.
Inoltre, a causa di eventuali difetti di produzione, quali ad esempio non perfetta pressatura e incollatura tra i vari strati di cellulosa, i supporti tendono a sfogliarsi. Furthermore, due to possible manufacturing defects, such as for example imperfect pressing and gluing between the various layers of cellulose, the supports tend to flake off.
Ancora, soprattutto I supporti di piccolo spessore hanno difficoltà a mantenere la sagoma bombata, necessaria in questi tipi di dischi. Again, especially the thin supports have difficulty in maintaining the rounded shape, necessary in these types of discs.
Scopo dell’ invenzione è quello di eliminare gli inconvenienti anzidetti, fornendo un supporto per dischi abrasivi che sia di basso costo, semplice da produrre, che mantenga la forma e che abbia una maggiore consistenza a parità di spessore rispetto ai supporti tradizionali. The purpose of the invention is to eliminate the aforementioned drawbacks, providing a support for abrasive discs that is low-cost, simple to produce, that maintains its shape and has greater consistency with the same thickness compared to traditional supports.
Questo scopo viene raggiunto, in accordo al'invenzione, con le caratteristiche espresse nell’annessa rivendicazione indipendente 1. This purpose is achieved, in accordance with the invention, with the characteristics expressed in the attached independent claim 1.
Realizzazioni vantaggiose dell’invenzione emergono dalle rivendicazioni dipendenti. Advantageous embodiments of the invention emerge from the dependent claims.
Sostanzialmente, il supporto per dischi abrasivi secondo l’invenzione è ottenuto per stampaggio di materiale plastico. Basically, the support for abrasive discs according to the invention is obtained by molding plastic material.
II materiale plastico costituente il supporto è in particolare poliammide (nylon) 66 rinforzato con fibre di vetro. La percentuale di fibre di vetro di rinforzo va convenientemente dal 20 al 50 % ed è vantaggiosamente del 30%. The plastic material constituting the support is in particular polyamide (nylon) 66 reinforced with glass fibers. The percentage of reinforcing glass fibers conveniently ranges from 20 to 50% and is advantageously 30%.
Ulteriori caratteristiche dell’invenzione appariranno più chiare dalla descrizione dettagliata che segue, riferita ad una sua forma puramente esemplificativa, e quindi non limitativa di realizzazione, illustrata nei disegni annessi, in cui: Further features of the invention will appear clearer from the detailed description that follows, referring to a purely exemplary and therefore non-limiting embodiment, illustrated in the attached drawings, in which:
la fig. 1 è una vista in pianta dall’alto di un disco abrasivo comprendente un supporto secondo l’invenzione; fig. 1 is a top plan view of an abrasive disc comprising a support according to the invention;
la fig. 2 è una vista in sezione presa secondo la linea II-II di fig. 1. fig. 2 is a sectional view taken along the line II-II of fig. 1.
Con riferimento a tali figure, con 1 è stato indicato, nel suo complesso, un disco abrasivo per la sgrossatura o la levigatura di marmi, pietre, metalli e simili. With reference to these figures, 1 indicates, as a whole, an abrasive disc for roughing or polishing marble, stone, metals and the like.
Il disco 1 comprende un supporto 2 e uno strato di materiale abrasivo 3, applicato su di esso mediante collante. The disc 1 comprises a support 2 and a layer of abrasive material 3, applied on it by means of glue.
Il disco 1 può essere di tipo flessibile o semi rigido, in base agli spessori del supporto e dello strato abrasivo, in funzione dell’utilizzazione cui il disco è destinato. The disc 1 can be of the flexible or semi-rigid type, based on the thickness of the support and the abrasive layer, depending on the use for which the disc is intended.
Pertanto, quella raffigurata è una forma puramente esemplificativa di un disco, del quale si può notare una certa bombatura, ovvero una concavità dal lato opposto a quello presentante lo strato abrasivo 3, nonché un foro centrale 4, per il montaggi sul mandrino dell’attrezzo destinato a porre in rotazione il disco in fase operativa. Therefore, the one shown is a purely exemplary form of a disc, of which it is possible to notice a certain convexity, that is a concavity on the side opposite to that presenting the abrasive layer 3, as well as a central hole 4, for mounting on the tool spindle. designed to rotate the disc during operation.
Sempre nell’esempio raffigurato, la parte centrale del disco, intorno al foro 4 presenta un avvallamento 5, con concavità opposta alla suddetta bombatura, per un suo migliore utilizzo. Also in the example shown, the central part of the disc, around hole 4 has a depression 5, with concavity opposite to the aforementioned camber, for its better use.
Secondo l’invenzione, il supporto 2 è ottenuto per stampaggio di materiale plastico. According to the invention, the support 2 is obtained by molding plastic material.
In questo modo è possibile ottenere un supporto 2 perfettamente sagomato, che mantiene la forma bombata anche a seguito dell’ applicazione dello strato abrasivo 3. In this way it is possible to obtain a perfectly shaped support 2, which maintains the rounded shape even following the application of the abrasive layer 3.
Convenientemente il materiale plastico del supporto 2 è poliammide 66 rinforzata con fibre di vetro, in un intervallo percentuale che va dal 20 al 50 %. Conveniently, the plastic material of the support 2 is polyamide 66 reinforced with glass fibers, in a percentage range from 20 to 50%.
Più preferibilmente, le fibre di vetro di rinforzo sono del 30 %. More preferably, the reinforcing glass fibers are 30%.
Si è constatato che la poliammide 66 con il 30 % di fibre di vetro di rinforzo conferisce le migliori caratteristiche al disco abrasivo 1, in termini di consistenza a parità di spessore, di rigidità nell’utilizzo , di capacità di esportazione, di tenuta della sagoma. It has been found that polyamide 66 with 30% reinforcing glass fibers gives the best characteristics to the abrasive disc 1, in terms of consistency with the same thickness, rigidity in use, export capacity, shape retention .
Qui di seguito vengono riportati alcuni dati tecnici della poliammide 66 al 30 % di fibre di vetro, utilizzata per lo stampaggio del supporto 2 secondo l’invenzione. Below are some technical data of polyamide 66 with 30% glass fibers, used for the molding of the support 2 according to the invention.
Claims (10)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2001MI000789A ITMI20010789A1 (en) | 2001-04-12 | 2001-04-12 | SUPPORT FOR ABRASIVE DISCS AND ABRASIVE DISCS INCLUDING SUCH SUPPORT |
MA26588A MA25610A1 (en) | 2001-04-12 | 2002-04-05 | SUPPORT FOR ABRASIVE DISCS AND ABRASIVE DISCS INCLUDING THIS SUPPORT. |
EP20020007984 EP1249309A1 (en) | 2001-04-12 | 2002-04-10 | Support for abrasive discs and abrasive disc comprising said support |
TNTNSN02041A TNSN02041A1 (en) | 2001-04-12 | 2002-04-11 | SUPPORT FOR ABRASIVE DISCS AND ABRASIVE DISCS INCLUDING THIS SUPPORT. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2001MI000789A ITMI20010789A1 (en) | 2001-04-12 | 2001-04-12 | SUPPORT FOR ABRASIVE DISCS AND ABRASIVE DISCS INCLUDING SUCH SUPPORT |
Publications (2)
Publication Number | Publication Date |
---|---|
ITMI20010789A0 ITMI20010789A0 (en) | 2001-04-12 |
ITMI20010789A1 true ITMI20010789A1 (en) | 2002-10-12 |
Family
ID=11447491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT2001MI000789A ITMI20010789A1 (en) | 2001-04-12 | 2001-04-12 | SUPPORT FOR ABRASIVE DISCS AND ABRASIVE DISCS INCLUDING SUCH SUPPORT |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1249309A1 (en) |
IT (1) | ITMI20010789A1 (en) |
MA (1) | MA25610A1 (en) |
TN (1) | TNSN02041A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4525177A (en) * | 1983-03-03 | 1985-06-25 | Grimes Philip M | Method of making coated abrasive disc |
US5316812A (en) * | 1991-12-20 | 1994-05-31 | Minnesota Mining And Manufacturing Company | Coated abrasive backing |
KR0161543B1 (en) * | 1991-12-20 | 1998-12-15 | 테릴 켄트 쿠알리 | Method of preparation of a coated abrasive belt with an endless seamless backing |
US6089963A (en) * | 1999-03-18 | 2000-07-18 | Inland Diamond Products Company | Attachment system for lens surfacing pad |
-
2001
- 2001-04-12 IT IT2001MI000789A patent/ITMI20010789A1/en unknown
-
2002
- 2002-04-05 MA MA26588A patent/MA25610A1/en unknown
- 2002-04-10 EP EP20020007984 patent/EP1249309A1/en not_active Withdrawn
- 2002-04-11 TN TNTNSN02041A patent/TNSN02041A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
EP1249309A1 (en) | 2002-10-16 |
MA25610A1 (en) | 2002-12-31 |
ITMI20010789A0 (en) | 2001-04-12 |
TNSN02041A1 (en) | 2004-03-05 |
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