Abrasive article and adapter therefore

Patent metadata

Field	Value
Publication number	US-2016144484-A1
Application number	US-201414899580-A
Country	US
Kind code	A1
Filing date	Jun 30, 2014
Priority date	Jul 2, 2013
Publication date	May 26, 2016
Grant date	—

Abstract

An abrasive article and an adapter therefore are disclosed. The abrasive article comprises a backing and an abrasive coating on a surface of the backing, and has a centre point and a periphery and the abrasive coating forming a work surface. A plurality of holes extending through the backing and the abrasive coating are provided, through which particulate material may be extracted. The work surface is divided into at least a first inner and a second outer zone, the second zone being concentric with the first and the centre point. Each zone has at least one hole, wherein in each of the first and the second zone the sizes of the holes and their total number forms a hole density for that respective zone. The hole density of the first zone is less than the hole density of the second zone. The adapter has the mounting surface for the abrasive article adapted in a similar manner.

First claim

1 . An abrasive article comprising a backing and an abrasive coating on a surface of the backing, the article having a centre point and a periphery and the abrasive coating forming a work surface;
and a plurality of holes extending through the backing and the abrasive coating, through which particulate material may be extracted; wherein the work surface is divided into at least a first inner and a second outer zone, the second zone being concentric with the first and the centre point; each zone having at least one hole, wherein in each of the first and the second zone the sizes of the holes and their total number forms a hole density for that respective zone; and wherein the hole density of the first zone is less than the hole density of the second zone.

2 . Abrasive article according to claim 1 , wherein in each zone, each hole has a size and position within the respective zone such that the ratio between the distance of each hole from the centre point multiplied by the total surface area of abrasive coating within the respective zone and the total surface area of the at least one hole within the respective zone is substantially constant for the first and second zones.

3 . Abrasive article according to claim 1 , wherein the at least two holes are provided in each zone, and the holes in each zone are distributed evenly about the centre point.

4 . Abrasive article according to claim 1 , wherein the article is in the form of a disc.

5 . Abrasive article according to claim 1 , further comprising a third zone, positioned between the first and second zones, in which there are no holes.

6 . Abrasive article according to claim 1 , further comprising a third zone, positioned between the first and second zones, comprising at least one hole.

7 . Abrasive article according to claim 4 , wherein the holes are positioned along radii of the disc.

8 . Abrasive article according to claim 1 , wherein at least one further hole is provided outside of the at least two zones.

9 . Abrasive article according to claim 8 , wherein the at least one further hole is a centre hole, positioned at the centre point.

10 . Abrasive article according to claim 8 , wherein the at least one further hole is located away from the centre point.

11 . Abrasive article according to claim 1 , wherein the at least two holes in each zone form an overall asymmetric pattern across the abrasive article.

12 . Abrasive article according to claim 1 , wherein the holes have a diameter in the range 1.0 mm to 25.0 mm.

13 . Abrasive article according to claim 1 , comprising between 7 and 100 holes.

14 . Abrasive article according to claim 1 , comprising between 7 and 30 holes.

15 . Abrasive article according to claim 1 , wherein the particulate is dust, and the abrasive article is adapted for use with dust extraction equipment.

16 . An adapter for an abrasive article comprising a body having a mounting surface adapted for the attachment of an abrasive article, the adapter having a centre point and a periphery;
and a plurality of holes extending through the body, through which particulate material may be extracted; wherein the mounting surface is divided into at least a first inner and a second outer zone, the second zone being concentric with the first and the centre point; each zone having at least one hole, wherein in each of the first and the second zone the sizes of the holes and their total number forms a hole density for that respective zone; and wherein the hole density of the first zone is less than the hole density of the second zone.

17 . Adapter according to claim 16 , wherein in each zone, each hole has a size and position within the respective zone such that the ratio between the distance of each hole from the centre point multiplied by the total surface area of mounting surface within the respective zone and the total surface area of the at least one hole within the respective zone is substantially constant for the first and second zones.

18 . Adapter according to claim 16 , wherein the at least two holes are provided in each zone, and the holes in each zone are distributed evenly about the centre point.

19 . Adapter according to claim 16 , wherein the adapter is in the form of a circular back up pad.

20 . Adapter according to claim 16 , further comprising a third zone, positioned between the first and second zones, in which there are no holes.

21 . Adapter according to claim 16 , further comprising a third zone, positioned between the first and second zones, comprising at least one hole.

22 . Adapter according to claim 19 , wherein the holes are positioned along radii of the circular back up pad.

23 . Adapter according to claim 16 , wherein at least one further hole is provided outside of the at least two zones.

24 . Adapter according to claim 23 , wherein the at least one further hole is a centre hole, positioned at the centre point.

25 . Adapter according to claim 23 , wherein the at least one further hole is located away from the centre point.

26 . Adapter according to claim 16 , wherein the at least two holes in each zone form an overall asymmetric pattern across the adapter.

27 . Adapter according to claim 16 , wherein the holes have a diameter in the range 1.0 mm to 25.0 mm.

28 . Adapter according to claim 16 , comprising between 7 and 100 holes.

29 . Adapter according to claim 16 , comprising between 7 and 30 holes.

30 . Adapter according to claim 16 , wherein the particulate is dust, and the adapter is adapted for use with dust extraction equipment.

Assignees

• 3M Innovative Properties Co

Inventors

• Simon Theo

Classifications

• B24D9/08 Primary

  Circular back-plates for carrying flexible material · CPC title

• B24D11/001

  Manufacture of flexible abrasive materials · CPC title

• B24B55/102 Primary

  with rotating tools · CPC title

• B24B55/06

  Dust extraction equipment on grinding or polishing machines (B24B31/12 takes precedence) · CPC title