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Abrasive tool for collecting dust

a technology of abrasive tools and dust, which is applied in the direction of manufacturing tools, metal-working equipment, grinding/polishing safety devices, etc., can solve the problems of insufficient support of abrasive materials in portions with annular grooves, insufficient dust collection performance, etc., and achieves enhanced rigidity and enhanced dust collection

Inactive Publication Date: 2007-10-18
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0033]The present invention provides an abrasive tool for collecting dust having an abrasive material in sheet form having not less than 20 dust collecting holes, and a backup pad for supporting the abrasive material. The backup pad includes a base material having a first major surface, a second major surface opposite to the first major surface, and at least one hole for collecting dust penetrating through the first major surface and the second major surface; and a ventilative member connected to the first major surface of the base material, having an attaching surface to which the abrasive material is attached, and a plurality of holes extending from the attaching surface towards the first major surface of the base material. The ventilative member works jointly with the base material and makes dust flow out from the attaching surface to the second major surface of the base material. With the backup pad and abrasive material disclosed herein, it is unnecessary to match the position of the holes when the abrasive material is attached to the backup pad. In this way, labor is reduced and dust collection performance is not compromised by mistakes.
[0034]An abrasive tool for collecting dust according to embodiments disclosed is a combination of an abrasive material in sheet form having a large number, not less than 20, of dust collecting holes, and a backup pad having a ventilative member, characterized in that matching of the position of the holes when the two are attached to each other becomes unnecessary, and good dust collecting performance on an abrasive surface at an arbitrary attachment position, can be secured.

Problems solved by technology

When an abrasive material is mounted on the backup pad, the work of attaching the abrasive material while confirming the position of the holes in the pad and in the abrasive material by the eye and positioning the holes is required, which is troublesome.
In the case where the position of the holes in the abrasive material does not match with the position of the holes in the backup pad, the number of dust collecting holes having effective openings becomes small in the abrasive surface, and therefore, sufficient dust collecting performance cannot be obtained.
However, support of the abrasive material in portions with annular grooves becomes insufficient.
In addition, in the case where the holes are not created along concentric circles in the abrasive material, the positions of the holes do not match the holes in annular groove form, and thus, the problem is not sufficiently solved.
In this case also, it is possible that the position of the holes of the abrasive material will not match that of the backup pad, thus, this too is an imperfect solution.

Method used

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Examples

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example 1

[0088]Holes were created in an abrasive material “Disc Unicut P400” having a diameter of 125 mm, made by Sumitomo 3M Ltd., and thereby, the opening structure shown in FIG. 2 was formed. The area per dust collecting hole that forms the opening structure was 19.6 mm2, the distance between end portions of adjacent dust collecting holes was 5 mm, the number of holes is 69, and the area ratio of the dust collecting holes was 1%.

[0089]Holes were created in a sheet material made of synthetic leather with a surface fastener made of nylon having a thickness of 1 mm to 2 mm, and this was used as a ventilative member, and thereby, a backup pad having an opening structure in the surface for attaching an abrasive material was fabricated. FIG. 15(a) is a plan diagram showing this surface for attaching an abrasive material. The area per hole that forms the opening structure was 52.6 mm2, the distance between end portions of adjacent holes was 4 mm, the number of dust collecting holes was approxima...

example 2

[0094]Holes were created in a sheet material of which the thickness and the material were the same as those in Example 1, and this was used as a ventilative member, and a backup pad having an opening structure on the surface for attaching an abrasive material was fabricated. FIG. 16(a) is a plan diagram showing this surface for attaching an abrasive material. The area per hole that forms the opening structure was 100 mm2, the distance between end portions of adjacent holes was 4 mm, and the area ratio of the holes was 33%.

[0095]An abrasive tool for collecting dust was obtained in the same manner as in Example 1, except that this backup pad was used, and a abrading test was carried out. FIG. 16(b) is a plan diagram showing an example of the abrasive surface of the abrasive tool for collecting dust. The effective openings of the abrasive surface are shown as dark regions. In this case, the ratio of the number of effective openings of the abrasive surface was always not less than 61%, ...

example 3

[0096]Holes were created in a sheet material of which the thickness and the material were the same as those in Example 1, and this was used as a ventilative member, and a backup pad having an opening structure on the surface for attaching an abrasive material was fabricated. FIG. 17(a) is a plan diagram showing this surface for attaching an abrasive material. The area per hole that forms the opening structure was 42.3 mm2, the distance between end portions of adjacent holes was 4 mm, and the area ratio of the holes was 24%.

[0097]An abrasive tool for collecting dust was obtained in the same manner as in Example 1, except that this backup pad was used, and a abrading test was carried out. FIG. 17(b) is a plan diagram showing an example of the abrasive surface of the abrasive tool for collecting dust. The effective openings of the abrasive surface are shown as dark regions. In this case, the ratio of the number of effective openings of the abrasive surface was always not less than 54%,...

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Abstract

An abrasive tool for collecting dust, comprising:an abrasive material in sheet form having not less than 20 dust collecting holes; anda backup pad, including: a base material having a first major surface, a second major surface opposite to the first major surface, and at least one hole for collecting dust penetrating through the first major surface and the second major surface; and a ventilative member connected to the first major surface of the base material, having an attaching surface to which the abrasive material is attached, and a plurality of holes extending from the attaching surface towards the first major surface of the base material; the ventilative member working jointly with the base material and making dust flow out from the attaching surface to the second major surface of the base material.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority to Japanese Application No. 2006-112204, filed on Apr. 14, 2006, the disclosure of which is incorporated by reference in its entirety herein.TECHNICAL FIELD[0002]The present invention relates to an abrasive tool for collecting dust having an abrasive material in sheet form with holes for collecting dust and a backup pad for supporting abrasive materials which has a ventilative member.BACKGROUND[0003]Soft coated film, pate and the like are abraded in automobile repairing work and the like. When a soft coated film, pate or the like is abraded, a large amount of abraded dust or swarf is created, and therefore, it is necessary to properly discharge the abraded swarf to prevent clogging of the ventilation system. Therefore, in conventional abrasive tools it is known to have openings for collecting dust.[0004]Such abrasive tools are generally formed of an abrasive material in sheet form (abrasive cloth or the lik...

Claims

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Application Information

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IPC IPC(8): B24D11/00
CPCB24D11/00B24B55/102
Inventor OKA, HITOSHITAKINAMI, SATORU
Owner 3M INNOVATIVE PROPERTIES CO