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WO2014135925A1 - Process for producing abrasive tape reels - Google Patents

Process for producing abrasive tape reels Download PDF

Info

Publication number
WO2014135925A1
WO2014135925A1 PCT/IB2013/052351 IB2013052351W WO2014135925A1 WO 2014135925 A1 WO2014135925 A1 WO 2014135925A1 IB 2013052351 W IB2013052351 W IB 2013052351W WO 2014135925 A1 WO2014135925 A1 WO 2014135925A1
Authority
WO
WIPO (PCT)
Prior art keywords
abrasive
granules
tape reels
abrasive granules
areas
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.)
Ceased
Application number
PCT/IB2013/052351
Other languages
French (fr)
Inventor
Nicola Levorato
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
Application filed by Individual filed Critical Individual
Priority to ES13721406.0T priority Critical patent/ES2673166T3/en
Priority to EP13721406.0A priority patent/EP2964425B1/en
Priority to SI201331057T priority patent/SI2964425T1/en
Priority to PL13721406T priority patent/PL2964425T3/en
Publication of WO2014135925A1 publication Critical patent/WO2014135925A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
    • B24D3/28—Resins or natural or synthetic macromolecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B24D11/001—Manufacture of flexible abrasive materials
    • 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
    • B24D18/0018—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for by electrolytic deposition
    • 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
    • B24D18/0036—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for by winding up abrasive bands
    • 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
    • B24D18/0072—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using adhesives for bonding abrasive particles or grinding elements to a support, e.g. by gluing

Definitions

  • the present patent concerns the field of abrasive tapes and in particular it concerns a new process for producing abrasive tape reels.
  • abrasive tapes or abrasive discs are used, which are referred to simply as abrasive tapes here below.
  • Abrasive tapes are usually constituted by a flexible support on which a layer of abrasive granules in a given size is firmly attached.
  • the flexible support is usually constituted by paper, cloth, plastic and similar materials.
  • the abrasive granules are usually constituted by aluminium oxide, carborundum (silicon carbide), zirconia (zirconium oxide), ceramic aluminium oxide.
  • the abrasive tapes are obtained by cutting very long and very wide rolls or reels in strips: the abrasive granules are attached to the flexible support, whose maximum width is 2 linear meters and whose length is variable, and the flexible support is successively cut in strips having the necessary width and length or according to circular or triangular or other patterns.
  • the new process comprises the following steps:
  • the flexible support can be constituted by paper with weights A-G, cotton fabric, polycotton fabric with weights FF and J, cloth with weight X and cloth with weight Y and any other type of weight.
  • the flexible support is unwound from its reel and conveyed towards a first spraying unit or another equivalent device suited to spread a layer of adhesive resin on the surface of the support.
  • the flexible support coated with adhesive resin then passes through a device suited to distribute or scatter the abrasive granules on its surface.
  • Said device for distributing or scattering abrasive granules is preferably constituted by an electrostatic deposition device suited to deposit the abrasive granules on the resin layer in a uniform and balanced way.
  • Said distribution and scattering device comprises devices suited to selectively deposit the abrasive granules on specific areas of the surface of the tape and the resin, meaning on rhomboidal, triangular, rectangular, hexagonal, polygonal and elliptic areas, in such a way as to obtain portions or strips without abrasive granules.
  • said portions or strips without abrasive granules constitute discharge ways for the abraded material.
  • the portions or strips without abrasive granules are inclined with respect to the width of the reel tape, so as to facilitate the elimination of the abraded material from the area included between the abrasive tape and the surface being processed.
  • the flexible support, coated with resin and scattered with granules is subjected to a drying process, in such a way as to harden the resin layer and definitely fix each granule onto the supporting tape.
  • the flexible support with the abrasive granules attached thereto is subjected to a second resin spraying step and to a subsequent drying step.
  • Said second resin layer makes it possible to join each abrasive granule to the adjacent abrasive granules, considerably improving the adhesion of the granules to the supporting tape and obtaining a longer duration of the finished abrasive tape.
  • a filler layer can be sprayed or spread on the reel tape with abrasive granules obtained as described above.
  • the enclosed drawing illustrates the new process for producing abrasive tape reels by way of non-limiting example.
  • FIG. 1 schematically illustrates the sequence of the new process.
  • a layer of adhesive resin is initially sprayed or in any case spread on the flexible support (F), unwound from the reel on which it is stored, by means of special devices (SI).
  • the flexible support (F) with the adhesive resin thereon passes through a distribution or scattering device (D) suited to distribute or scatter abrasive granules.
  • Said device (D) for distributing or scattering abrasive granules is constituted by an electrostatic deposition device suited to deposit the abrasive granules on the resin layer in a uniform and balanced manner.
  • Said distribution or scattering device (D) comprises templates (M) suited to deposit the abrasive granules on selected areas, for example rhomboidal areas as shown in Figure 2a, in such a way as to obtain portions or strips without abrasive granules.
  • the flexible support (F) coated with resin and with the granules deposited thereon is subject to a drying cycle by means of thermal resistor heaters or infrared ray heaters (El), in such a way as to harden the resin layer and definitively fix each granule onto the flexible support (F).
  • the flexible support (F) with the abrasive granules attached thereon is subjected to a second resin spraying step, during which suitable spraying devices (R2) spread a second resin layer suited to deposit mainly among the various abrasive granules.
  • Said second resin spraying step is followed by a second drying step performed by means of thermal resistor heaters or infrared ray heaters (E2).
  • the abrasive tape obtained in this way is wound on a winding reel.
  • Figures 2a, 2b, 2c, 2d, 2e, 2f show some examples of deposition of abrasive granules on specific areas of the tape, respectively: rhomboidal areas, polygonal areas, alternating triangular areas with alternating orientation, triangular areas generically in series forming a square pattern, staggered triangular areas, irregular areas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

Process for producing abrasive tape reels, comprising the step of spreading (SI) a layer of a base adhesive resin on a flexible support (F), the step of distributing or scattering (D) abrasive granules thereon using one or more templates (M) suited to obtain the selective deposition of the abrasive granules on areas delimited by strips without abrasive granules, the step of drying (El) the resin with the consequent adhesion of the abrasive granules, the step of spreading (S2) a second bonding resin layer, the step of drying (E2) the second resin layer. The abrasive granules are deposited on rhomboidal, triangular, rectangular, hexagonal, polygonal, elliptic areas.

Description

PROCESS FOR PRODUCING ABRASIVE TAPE REELS
DESCRIPTION
The present patent concerns the field of abrasive tapes and in particular it concerns a new process for producing abrasive tape reels.
In many abrasion, roughing, surface finishing, lapping and similar operations abrasive tapes or abrasive discs are used, which are referred to simply as abrasive tapes here below.
Abrasive tapes are usually constituted by a flexible support on which a layer of abrasive granules in a given size is firmly attached.
The flexible support is usually constituted by paper, cloth, plastic and similar materials.
The abrasive granules are usually constituted by aluminium oxide, carborundum (silicon carbide), zirconia (zirconium oxide), ceramic aluminium oxide.
The abrasive tapes are obtained by cutting very long and very wide rolls or reels in strips: the abrasive granules are attached to the flexible support, whose maximum width is 2 linear meters and whose length is variable, and the flexible support is successively cut in strips having the necessary width and length or according to circular or triangular or other patterns.
During lapping operations the problem arises that the abraded material is not eliminated and forms a layer between the piece to be processed and the abrasive tape, thus making the action of the abrasive tape ineffective.
In order to overcome the drawbacks described above a new process for producing abrasive tape reels has been designed and implemented.
The new process comprises the following steps:
spreading a layer of a base adhesive resin on the the flexible support; distributing or scattering the abrasive granules on different zones using templates or dies;
drying the resin and waiting for the abrasive granules to adhere to the flexible support;
spreading a second layer of bonding resin;
drying the second resin layer.
The flexible support can be constituted by paper with weights A-G, cotton fabric, polycotton fabric with weights FF and J, cloth with weight X and cloth with weight Y and any other type of weight.
The flexible support is unwound from its reel and conveyed towards a first spraying unit or another equivalent device suited to spread a layer of adhesive resin on the surface of the support.
The flexible support coated with adhesive resin then passes through a device suited to distribute or scatter the abrasive granules on its surface.
Said device for distributing or scattering abrasive granules is preferably constituted by an electrostatic deposition device suited to deposit the abrasive granules on the resin layer in a uniform and balanced way.
Said distribution and scattering device comprises devices suited to selectively deposit the abrasive granules on specific areas of the surface of the tape and the resin, meaning on rhomboidal, triangular, rectangular, hexagonal, polygonal and elliptic areas, in such a way as to obtain portions or strips without abrasive granules.
During the use of the abrasive tape, said portions or strips without abrasive granules constitute discharge ways for the abraded material.
According to the invention, the portions or strips without abrasive granules are inclined with respect to the width of the reel tape, so as to facilitate the elimination of the abraded material from the area included between the abrasive tape and the surface being processed. Successively, the flexible support, coated with resin and scattered with granules, is subjected to a drying process, in such a way as to harden the resin layer and definitely fix each granule onto the supporting tape.
Finally, the flexible support with the abrasive granules attached thereto is subjected to a second resin spraying step and to a subsequent drying step. Said second resin layer makes it possible to join each abrasive granule to the adjacent abrasive granules, considerably improving the adhesion of the granules to the supporting tape and obtaining a longer duration of the finished abrasive tape.
According to the invention, a filler layer can be sprayed or spread on the reel tape with abrasive granules obtained as described above.
The enclosed drawing illustrates the new process for producing abrasive tape reels by way of non-limiting example.
Figure 1 schematically illustrates the sequence of the new process.
A layer of adhesive resin is initially sprayed or in any case spread on the flexible support (F), unwound from the reel on which it is stored, by means of special devices (SI).
Successively, the flexible support (F) with the adhesive resin thereon passes through a distribution or scattering device (D) suited to distribute or scatter abrasive granules.
Said device (D) for distributing or scattering abrasive granules is constituted by an electrostatic deposition device suited to deposit the abrasive granules on the resin layer in a uniform and balanced manner.
Said distribution or scattering device (D) comprises templates (M) suited to deposit the abrasive granules on selected areas, for example rhomboidal areas as shown in Figure 2a, in such a way as to obtain portions or strips without abrasive granules. The flexible support (F) coated with resin and with the granules deposited thereon is subject to a drying cycle by means of thermal resistor heaters or infrared ray heaters (El), in such a way as to harden the resin layer and definitively fix each granule onto the flexible support (F).
After said first drying step, the flexible support (F) with the abrasive granules attached thereon is subjected to a second resin spraying step, during which suitable spraying devices (R2) spread a second resin layer suited to deposit mainly among the various abrasive granules.
Said second resin spraying step is followed by a second drying step performed by means of thermal resistor heaters or infrared ray heaters (E2). The abrasive tape obtained in this way is wound on a winding reel.
Figures 2a, 2b, 2c, 2d, 2e, 2f show some examples of deposition of abrasive granules on specific areas of the tape, respectively: rhomboidal areas, polygonal areas, alternating triangular areas with alternating orientation, triangular areas generically in series forming a square pattern, staggered triangular areas, irregular areas.
Therefore, with reference to the above description and the attached drawing, the following claims are expressed.

Claims

1. Process for producing abrasive tape reels, comprising the step of spreading (SI) a layer of a base adhesive resin on a flexible support (F), the step of distributing or scattering (D) abrasive granules thereon, the step of drying (El) the resin with the consequent adhesion of the abrasive granules, the step of spreading (S2) a second bonding resin layer, the step of drying (E2) the second resin layer, characterized in that it comprises one or more templates (M) suited to obtain the selective deposition of the abrasive granules on areas delimited by linear strips, from edge to edge, without abrasive granules.
2. Process for producing abrasive tape reels according to claim 1, characterized in that said strips without abrasive granules include wider portions.
3. Process for producing abrasive tape reels according to claim 1, characterized in that said abrasive granules are deposited on rhomboidal areas.
4. Process for producing abrasive tape reels according to claim 1, characterized in that said abrasive granules are deposited on triangular areas.
5. Process for producing abrasive tape reels according to claim 1, characterized in that said abrasive granules are deposited on rectangular areas.
6. Process for producing abrasive tape reels according to claim 1, characterized in that said abrasive granules are deposited on hexagonal areas.
7. Process for producing abrasive tape reels according to claim 1, characterized in that said abrasive granules are deposited on polygonal areas.
8. Process for producing abrasive tape reels according to claim 1, characterized in that said abrasive granules are deposited on elliptic areas.
9. Process for producing abrasive tape reels according to the preceding claims, characterized in that the distribution of said abrasive granules takes place through electrodeposition.
10. Process for producing abrasive tape reels according to the preceding claims, characterized in that it comprises a third step of spraying resin with the subsequent drying step.
PCT/IB2013/052351 2013-03-08 2013-03-25 Process for producing abrasive tape reels Ceased WO2014135925A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES13721406.0T ES2673166T3 (en) 2013-03-08 2013-03-25 Process to produce spools of abrasive tape
EP13721406.0A EP2964425B1 (en) 2013-03-08 2013-03-25 Process for producing abrasive tape reels
SI201331057T SI2964425T1 (en) 2013-03-08 2013-03-25 Process for producing abrasive tape reels
PL13721406T PL2964425T3 (en) 2013-03-08 2013-03-25 Process for producing abrasive tape reels

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000059A ITPD20130059A1 (en) 2013-03-08 2013-03-08 PROCEDURE FOR THE REALIZATION OF ABRASIVE COILS
ITPD2013A000059 2013-03-08

Publications (1)

Publication Number Publication Date
WO2014135925A1 true WO2014135925A1 (en) 2014-09-12

Family

ID=48326366

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2013/052351 Ceased WO2014135925A1 (en) 2013-03-08 2013-03-25 Process for producing abrasive tape reels

Country Status (8)

Country Link
EP (1) EP2964425B1 (en)
ES (1) ES2673166T3 (en)
IT (1) ITPD20130059A1 (en)
PL (1) PL2964425T3 (en)
PT (1) PT2964425T (en)
SI (1) SI2964425T1 (en)
TR (1) TR201807882T4 (en)
WO (1) WO2014135925A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110509197A (en) * 2019-08-24 2019-11-29 杭州永杰研磨材料有限公司 A kind of sand paper processing technology and equipment
CN111015536A (en) * 2019-12-17 2020-04-17 白鸽磨料磨具有限公司 Sand planting method and production system of coated abrasive tool
DE102022211517A1 (en) 2022-10-31 2024-05-02 Robert Bosch Gesellschaft mit beschränkter Haftung Grinding element, abrasive and method for producing the grinding element and/or the abrasive

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900005626A1 (en) * 2019-04-11 2020-10-11 Levorato Italia Srl PLANT FOR THE REALIZATION OF FLEXIBLE ABRASIVES AND RELATIVE METHOD OF REALIZATION

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB453851A (en) * 1934-05-21 1936-09-18 Carborundum Co Improvements in abrasive belts
JPH02180566A (en) * 1988-12-28 1990-07-13 Toshio Sugiura Polishing sheet equipped with hard abrasive grain and manufacture thereof
WO1994027833A1 (en) * 1993-05-25 1994-12-08 Ultimate Abrasive Systems, Inc. Patterned abrasive material and method
JP2011031361A (en) * 2009-08-05 2011-02-17 Nihon Micro Coating Co Ltd Polishing tool, polishing method, and method for manufacturing polishing tool
WO2011087653A1 (en) * 2009-12-22 2011-07-21 3M Innovative Properties Company Flexible abrasive article and methods of making

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB453851A (en) * 1934-05-21 1936-09-18 Carborundum Co Improvements in abrasive belts
JPH02180566A (en) * 1988-12-28 1990-07-13 Toshio Sugiura Polishing sheet equipped with hard abrasive grain and manufacture thereof
WO1994027833A1 (en) * 1993-05-25 1994-12-08 Ultimate Abrasive Systems, Inc. Patterned abrasive material and method
JP2011031361A (en) * 2009-08-05 2011-02-17 Nihon Micro Coating Co Ltd Polishing tool, polishing method, and method for manufacturing polishing tool
WO2011087653A1 (en) * 2009-12-22 2011-07-21 3M Innovative Properties Company Flexible abrasive article and methods of making

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110509197A (en) * 2019-08-24 2019-11-29 杭州永杰研磨材料有限公司 A kind of sand paper processing technology and equipment
CN111015536A (en) * 2019-12-17 2020-04-17 白鸽磨料磨具有限公司 Sand planting method and production system of coated abrasive tool
CN111015536B (en) * 2019-12-17 2021-06-29 白鸽磨料磨具有限公司 Sand planting method and production system of coated abrasive tool
DE102022211517A1 (en) 2022-10-31 2024-05-02 Robert Bosch Gesellschaft mit beschränkter Haftung Grinding element, abrasive and method for producing the grinding element and/or the abrasive

Also Published As

Publication number Publication date
TR201807882T4 (en) 2018-06-21
EP2964425A1 (en) 2016-01-13
ITPD20130059A1 (en) 2014-09-09
PL2964425T3 (en) 2018-08-31
EP2964425B1 (en) 2018-05-09
PT2964425T (en) 2018-06-25
ES2673166T3 (en) 2018-06-20
SI2964425T1 (en) 2018-10-30

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