JPH0567465U - Polishing block - Google Patents

Abstract

(57) [Summary] [Objective] The object of the present invention is to controllably distribute a liquid to a surface to be finished during a polishing operation. The polishing block of the present invention has a body including a bottom surface having an opening and a conduit extending from a cavity capable of containing a liquid to the opening, and a porous member installed in the conduit of the body. An abrasive sheet having openings that match openings in the body is attached to the bottom surface of the body. The porous member has an exposed wipe end extending from the opening in the body and beyond the abrasive working surface. The material of the porous member controls the passage of liquid such that when the exposed wipe end is moved in contact with the surface to be finished, it sufficiently wets the surface to be finished.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a manual polishing tool having means for distributing liquid to the surface to be finished during the polishing operation.

[0002]

[Prior Art]

 Manual abrasive tools, often referred to as abrasive blocks or sandpaper blocks, have been used for some time to prepare various surfaces, for example, prior to applying paint. Such abrasive blocks typically consist of a body adapted to secure an abrasive sheet with its exposed abrasive working surface in a flat position. Such polishing blocks are widely used to prepare automobiles for their refinishing.

[0003]

[Problems to be solved by the device]

 Most polishing blocks are dry. However, for some applications it is highly desirable to lubricate the surface to be finished with a liquid such as water so that the polishing surface does not become full or clogged. Water is supplied by first wetting the surface to be finished or by dipping the polishing block containing the polishing sheet in water before use. Such methods provide only a limited amount of water.

Several other devices have been used to provide a more continuous supply of water to the surface to be finished. For example, Brown (U.S. Pat. No. 2,904,940) discloses a wedge-shaped polishing tool that includes a body having a plurality of openings onto which a coated polishing web is mounted. As the tool is used, water is released through the gap in the abrasive web. However, such devices cannot be used in conventional coated abrasive sheets because they are generally not permeable. Further, because water flows continuously through the openings and the porous backing of the abrasive, there is little or no control of water flow from Brown's apparatus.

Carroll et al. (US Pat. No. 2,954,649) also disclose a cleaning pad and a retainer therefor using an abrasive grid cloth held by a frame on the surface of a sponge. Like Brown, Carroll et al. Also require a porous abrasive sheet, and the flow of liquid from the sponge to the workpiece surface can be poorly controlled because the sponge is not in direct contact with the surface to be finished.

[0006]

[Means for Solving the Problems]

 The present invention provides a polishing block that includes a device for controllably distributing a liquid to a surface to be finished during a polishing operation. The abrasive block of the present invention uses conventional coated abrasive sheets and does not require a coated abrasive sheet with a porous backing.

The polishing block of the present invention includes a body having a bottom surface with an opening. The body is adapted to expose an abrasive sheet having openings to the polishing working surface to secure it to the bottom surface in a substantially flat position. The openings in the abrasive sheet are aligned with the openings in the bottom. Needless to say, the abrasive sheet may have multiple openings, in which case there will be a sufficient number of such openings aligned with the openings in the bottom surface of the body to allow the proper passage of liquid. Must be done. The opposite side of the body can be gripped by the user's hand. Further, the body is provided with a cavity capable of containing a liquid. A conduit extends from the bottom opening to the cavity for delivering liquid from the cavity to the bottom opening. The body has a vent that communicates with the cavity to allow liquid to flow therefrom by gravity. A porous member is installed within the conduit, thereby blocking free flow of liquid from the cavity. The porous member has an exposed wipe end extending from the opening to or in front of the abrasive working surface. The porous member has a sufficient amount of liquid as the exposed end is brought into contact with the finished surface during the polishing operation in an amount sufficient to wet at least a portion of the finished surface with the liquid during the polishing operation. It is made of a material that allows controlled passage.

In the preferred embodiment, the body is formed of a semi-rigid and flexible material, and the porous member is a hydrophilic sponge. Since coated abrasive sheets with a pressure sensitive adhesive on the back side are widely used to facilitate adhesion, the bottom surface of the body should provide a means to facilitate the attachment of pressure sensitive adhesive to such coated abrasive sheets. It is preferable to have.

[0009]

【Example】

 With reference to FIGS. 1-3, the polishing block 10 of the present invention includes a specially shaped body 11 having a bottom surface 12 having an opening 13. The bottom surface 12 is adapted to hold an abrasive sheet 14 which also has an opening 15 formed therein to expose its abrasive working surface 16 and be held in a substantially flat position. The openings 15 in the abrasive sheet 14 are aligned with the openings 13 in the bottom surface 12. The body 11 further includes an opposite surface 17 that can be gripped by the user's hand, a cavity 18 that can contain a liquid, and an opening 13 in the bottom surface 12 so that liquid can be delivered from the cavity 18 through the opening 13. Conduit 19 extending to 18. Vents 20 are provided through the body 11 and into the cavity 18 to allow liquid to flow from the cavity under gravity and also to facilitate cavity 18 by submerging the polishing block 10 into the liquid. Is also made possible to satisfy. If the usage situation permits, the liquid supply pipe may be connected to the vent hole 20 to continuously supply the liquid.

Further, the polishing block 10 has a first portion 22 located within the conduit 19 so as to substantially prevent free flow of liquid from the cavity 18, and an exposure reaching the polishing working surface 16 from the opening 13. And a porous member 21 having a wiped end portion 23. The porous material 21 has an amount sufficient to wet at least a portion of the surface 24 with a liquid as its exposed wipe end portion 23 is brought into contact with and passes through the surface 24 to be finished during the polishing operation. It is formed from a material that allows controlled passage of liquids. The body 11 is sturdy enough to carry the forces encountered in conventional polishing operations, and excessive compression of the porous member 21 or contraction of the cavity 18 will result in premature removal of liquid therefrom. Formed of any material that can prevent For example, the body 11 may be formed of wood, hard plastic material, metal or the like. A preferred material for forming the body 11 is a rigid and flexible sea surface polyurethane. The opposite surface 17 of the body 11 is shaped to provide a more suitable shape for gripping, such as a handle 25.

The preferred shape of the bottom surface 12 is an annular shape in which the porous member 21 has a central opening into which it is fitted for use with a correspondingly shaped annular coated abrasive sheet. Of course other shapes are also conceivable.

The openings 13 in the bottom surface 12 can be circular, as shown, or any other convenient shape, such as square, triangular, elliptical, or the like.

The porous member 21 preferably substantially blocks free flow of liquid when inserted into the conduit 19, but allows liquid to pass through it as the exposed end 23 wipes the surface 24. Formed from such a hydrophilic sponge material. Other suitable materials for forming the porous member 21 include cotton swabs or other fibrous materials.

The cavity 18 may be of any convenient shape and may even be extremely large compared to the dimensions of the porous member 21. Alternatively, the porous member 21 may completely or substantially completely fill the conduit 19 and the cavity 18. The conduit 19 can be relatively long or relatively short, for example at the lower end of the cavity 18.

The porous member 21 of the preferred abrasive block of the present invention is retained within the conduit 19, preferably by frictional engagement, to fill at least the bottom portion of the conduit 19 from side to side and to allow liquid free from the cavity 18. Virtually stop the flow. Other mounting methods for the porous member 21 are also possible, for example, bonding with an adhesive. Frictional engagement is preferred because it permits transfer of the porous member 21 downward (ie, from the bottom surface 12 outwards) as the exposed end 23 of the porous member 21 wears during use.

Since coated abrasive sheets having a pressure sensitive adhesive on the back side for bonding are currently in widespread use, bottom surface 12 is preferably adapted for attachment of such sheet material. For this purpose, it is desirable to adhesively or otherwise secure a thin plate 26 of plastic material, which is more desirable for the deposition of a pressure sensitive adhesive coating on the coated abrasive sheet, to the bottom surface 12. Such a lamella 26 can be easily removed from it when the pressure sensitive adhesive coating material has adhered to it and the useful life of the abrasive sheet 10 has expired or when the abrasive sheet 10 requires removal for other reasons. It can be formed from vinyl or any other material.

The liquid used as the lubricating liquid for the polishing operation stored in the cavity 18 is preferably water, but other liquids, for example solutions of various salts, which provide some improvement to the polishing operation, Alternatively, a mixture of water and an organic liquid or just an organic liquid can be used depending on the particular material used and the particular polishing operation performed.

The recommended polishing block 10 of the present invention typically has a round opening 13 in the bottom surface 12 having a diameter of about 1/2 inch to about 5.08 cm. The opening 13 should be of sufficient size to allow the appropriate amount of the porous member 21 to be exposed and contact the surface to be processed and to deliver an appropriate amount of liquid onto the surface 24. The most recommended embodiment has a central opening having a diameter of about 1 1/2 inch.

The preferred embodiment further preferably has a diameter of about 6 to allow air to enter cavity 18 and thereby allow water to be released from cavity 18 under gravity. It has a ventilation hole 20 of 35 mm (1/4 inch).

Of course, the abrasive sheet of the present invention requires that a sufficient number of openings be aligned and aligned with the openings in the bottom surface of the body 11 and such openings aligned with the abrasive sheet. However, multiple openings can be provided provided that the porous members are sufficiently sized to extend therethrough to provide a sufficient amount of liquid on the work surface.

Other modifications of the polishing pad of the polishing block of the present invention are contemplated without departing from the scope of utility model registration claims.

[Brief description of drawings]

FIG. 1 is a perspective view of a polishing block of the present invention having an abrasive sheet attached, with the sheet partially broken away to show details of the polishing block.

Figure 2 Figure 1 in contact with the surface to be polished.
(2-2 line) The cross-sectional view of the polishing block shown by (2-2).

FIG. 3 is a plan view of the bottom surface of the polishing block of FIG.

[Explanation of symbols]

 10 polishing block 11 main body 12 bottom surface 13 opening 14 abrasive sheet 15 opening 16 polishing surface 17 opposite surface 18 cavity 19 conduit 21 porous member 23 exposed wipe end 24 surface

Claims (1)

[Scope of utility model registration request] 1. A polishing block particularly suitable for a manual polishing operation, comprising: (a) a polishing material sheet having a bottom surface having an opening and a through-opening, the polishing surface of which is exposed, and A bottom surface adapted to be held in a substantially planar position in alignment with the bottom surface opening; an opposite surface graspable by a user's hand; a cavity capable of containing a liquid; and an opening in the bottom surface A body including a conduit extending from the cavity to the cavity for passing liquid from the cavity to the opening in the bottom surface, and (b) substantially mating with the conduit to substantially free flow of liquid from the cavity. A porous member having an exposed wipe end extending from the opening to the polishing surface, or beyond the polishing surface, sufficient to moisten at least a portion of the liquid polishing surface. The exposed wiping end is in contact with the surface during polishing work by an amount, and polishing block comprising a porous member formed of a material such as to control the passage of liquid upon passing the surface.