JPH09141558A - Grinding body for grinding mirror finished surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a coated surface from being marred by cutting a peripheral part at right angle relative to ditches and reducing the outer sizes more than those on a ditch side. SOLUTION: The B surface 7 of a surface fastener is formed on the upper surface of a sponge 6, and mounted on the surface fastener A surface of the pad of a grinding machine. On the other hand, a base material 2 comprising a cloth is stuck on the lower surface of the sponge 6 with adhesive agent, multiple parallel ditches 4 woven with fibers 3 are formed in the base material 2, and they are cut flat at a length of approximately 5mm so as to form a flat blasting surface. Then a notch part 8 cut along the ditches 4 is provided around the grinding surface at right angle to the ditches 4 provided in parallel with the grinding surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an automobile body,
The present invention relates to a polishing body for mirror-polishing used for polishing a painted surface.

[0002]

2. Description of the Related Art Up to now, a polishing body in which a circular flat polishing surface as shown in FIG. 1 So-called buffs have been widely used for adjusting the painted skin and for producing a specular gloss. That is, a base material 2 made of cloth is woven with fine fibers 3 such as wool, polyester or tetron, and a plurality of parallel ditches 4 are formed at equal intervals, and further fluffed to a length of about 5 mm to form a planar shape. Polishing surface 5 is formed, and this is formed into a disk shape, and the polishing machine P
It was designed to be attached to the pad through the hook-and-loop fastener.

[0003]

The conventional polishing body 1 shown in FIG. 9 has the following drawbacks. That is, the surface to be polished was apt to be scratched when the molding was carried out or the recessed rounded surface was polished by a rotary polishing machine. Therefore, when the polishing surface 5 is looked closely, as shown in FIG. 10, the peripheral edge portion a of the base material 2 projects more than the fibers 3, and when polishing is performed in this state, the polishing surface of the surface to be polished is The surface to be polished was scratched at the peripheral edge portion a because the base material 2 squeezes out further when force is applied to the tip portion or the fiber 3 is worn. This is because it rotates, and the ditch 4 is formed parallel to the peripheral portion of the polishing surface 5 even though the polishing body 1 is circular.

When manufacturing the abrasive body 1 in a circular form from a raw fabric with a punching die, when trying to pull out with a desired size, the blade hits the ditch 4 and a portion without the fiber 3 is formed at the peripheral edge a. . Then, it is usual to think that it is sufficient to hit the fiber 3 part with a blade so that the punching blade does not hit the place of the ditch 4. However, the raised portion falls and the fiber 3 is cut. Further, since the ditches 4 are arranged at equal intervals, the dimensions are restricted, and the size cannot be freely set. The problem to be solved by the present invention is to prevent the coated surface from being scratched at the peripheral edge of the base material, so as not to form a fiber-unbrushed portion at the peripheral edge of the polishing body, and to remove the fiber. The point is that it can be easily manufactured with a mold.

[0005]

A polishing body for mirror polishing according to the present invention is attached to a pad of a rotary polishing machine via a hook-and-loop fastener, and wool, polyester, or tetron is formed on a surface of a substrate made of a disc-shaped cloth. A number of parallel ditches are provided by ultrafine fibers such as, and the fibers are raised to form a flat polished surface, and the peripheral edge portion in the direction perpendicular to the ditch is cut off to prevent scratches on the surface to be polished. It is something that is done. In addition, a sponge may be attached to the back surface of the base material with an adhesive to impart elasticity, or the sponge may be attached to the base material via a surface fastener to separate the base material and the sponge. In that case, in order to facilitate the separation, the periphery of the joint portion of the surface fastener A surface provided on the sponge side is ground in an annular shape with abrasive grains to cut off only the caught portion, and the tip of the scraped trace It is desirable to form a protrusion in the direction of rotation in the part.
When cutting, the cutting may be performed from the center of the ditch or at the root of the fiber. It is also possible to use fibers, but it is desirable that the fibers should not be covered. The shape of the notch and the area to be removed are not particularly limited. Therefore, the whole shape may be elliptical or polygonal as long as the width in the direction perpendicular to the ditch provided in parallel to the polishing surface is narrowed.

[0006]

The polishing body for mirror polishing according to the present invention is used as follows. That is, although not shown, the surface fastener B surface 7 of the polishing body 1 is attached so as to be centered on the surface fastener A surface of the pad mounted on the rotary shaft of the polishing machine. In this state, for example, when polishing an automobile door, it is usual to apply the entire polishing surface 5 to a flat surface with a rotary polishing machine to perform polishing, but this type of planar polishing surface is used. In the case of a polishing body having 5, the center of gravity rather than the central hole 9 and polishing at the tip end are more stable and have a grinding force, which is an efficient method. Therefore, as described above, since the surface of the side molding easily scratches the surface to be polished as described above, the polishing is stopped near the front of the side molding, and the rest is a hand polishing step. However, in the present example, the peripheral edges of the parallel ditch 4 in the perpendicular direction are removed so as to face each other to reduce the width, and the cutout 8 is inside the circular end even when the polishing body rotates. So
Even if you apply force to the tip of the polishing surface to polish, the peripheral edge of the ditch does not squeeze out from the outer diameter, and the fibers penetrate to the edge of the side molding. This also applies to the concave rounded surface. Therefore, the step of hand polishing can be omitted, and the work can be shortened. Further, in the case where the sponge 6 is detachably attached to the back surface of the substrate 2 via a surface fastener (see FIG. 6), the polishing surface 5 can be washed separately after use. The polishing surface 5 is sponge 6
Since it is a separate body from the above, only the polishing surface 5 portion is required when replacing, which is economical. Further, as shown in FIG. 7, in order to easily separate the polishing surface 5 and the sponge 6, the hooking portion 12 of the surface fastener A surface 10 is scraped off with a grinder or the like to form a cutting piece 13. Then, at the tip of the cutting piece 13, the rotation direction (arrow mark R)
A projection 14 is formed in a unidirectional direction, just like a file, and the B surface 11 of the surface fastener is caught on the projection 14 only when the polishing body 1 is rotated. This is to prevent lateral slippage peculiar to the hook-and-loop fastener that occurs during the work, and when pressed against the work piece, the connection is deeper. Then, when the rotation is stopped, it returns to its original state and becomes in a state where it can be easily separated.

[0007]

Embodiment 1 Embodiment 1 of the present invention will be described with reference to FIGS. 1 is a perspective view showing a first embodiment, and FIG. 2 is a sectional view taken along the line AA shown in FIG. 3 is a plan view showing the polishing surface. Reference numeral 1 denotes a disk-shaped polishing body having a trapezoidal shape as a whole. In the figure, a surface B of the surface fastener 7 is formed on the upper surface of the sponge 6, and is attached to the surface fastener A surface of the pad of the polishing machine (not shown). On the other hand, on the lower surface, a sponge 6 and a base material 2 made of cloth are used.
Is attached with an adhesive, and a plurality of parallel ditches 4 woven with fibers 3 are formed on the base material 2 and cut flat to a length of about 5 mm to form a flat polishing surface 5. ing. Then, a notch 8 cut along the ditch 4 is provided at the peripheral edge portion in the direction perpendicular to the ditch 4 provided in parallel to the polishing surface 5. Reference numeral 9 is a central hole formed in the central portion.

Second Embodiment A second embodiment of the present invention will be described with reference to FIGS. 4 is a perspective view showing the second embodiment, FIG. 5 is a sectional view taken along the line BB shown in FIG. 4, and FIG. 6 is a perspective view showing the structure and operation of the second embodiment. 7 and 8
[Fig. 8] is an operation explanatory view showing an enlarged part of the structure of the second embodiment. The second embodiment is substantially the same as the first embodiment, and a nylon surface fastener A surface 10 is provided on the lower surface of the trapezoidal disk-shaped sponge 6, and the surface fastener is provided on the base material 2 side. The B side 11 is provided. That is, the sponge 6 and the base material 2 are a pair of surface fasteners 10,
Each of them is connected or separated by 11. Further, a cutout portion 8'is provided in the peripheral portion of the joint portion on the sponge 6 side which is separated from the polishing surface 5, and the cutout portion 8'is provided.
The notch 8 provided in the peripheral portion of the polishing surface 5 is made to coincide with each other when the surface fastener A surface 10 and the surface fastener B surface 11 are joined. If they do not match, the sponge may have a smaller diameter. Then, the periphery of the surface fastener A surface 10 of the sponge 2 is ground into an annular shape by a grinder or the like holding abrasive grains, the hook 12 is cut short to form a cutting piece 13, and the tip of the cutting piece 13 is cut. A protrusion 14 is formed on the surface of the polishing body 1 in the rotation direction (arrow R) of the polishing body 1. The method of processing the surface of the surface fastener A surface 10 is performed as follows. First, a sponge having a nylon surface fastener A surface attached thereto and formed into a circular shape is attached to a rotating machine, and the rotating machine is rotated in the reverse direction against the rotation direction of the polishing machine. Next, when the grindstone of the normal rotation is applied to the surface of the surface fastener A surface which is rotating in the reverse direction, the caught portion is cut off, and at the same time, the projection 14 is formed there.

[0009]

According to the present invention, since the non-brushed portion as in the conventional case is not formed at the peripheral portion of the polishing surface in the direction perpendicular to the ditch, there is no fear of scratching the surface to be polished at the peripheral portion. With care, you can perform polishing work such as when molding. Also,
Since only the peripheral part is cut off, the number of manufacturing steps is the same as in the past, so the cost does not increase, the size can be freely set, and mass production with a punching die is possible. In the case where the polishing surface is separated from the sponge, only the polishing surface needs to be replaced, which is economical. Further, since the hooked portion around the surface fastener A surface is ground, it is easy to separate, and since the projection is provided, the connecting portion does not open during use and there is no deviation and it is safe.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment.

FIG. 2 is a sectional view taken along line AA of FIG. 1 showing the first embodiment.

FIG. 3 is a plan view showing the first embodiment.

FIG. 4 is a perspective view showing a second embodiment.

FIG. 5 is a sectional view taken along line BB in FIG. 4 showing the second embodiment.

FIG. 6 is a perspective view showing the structure and operation of the second embodiment.

FIG. 7 is an operation explanatory view showing an enlarged part of the structure of the second embodiment.

FIG. 8 is an operation explanatory view showing a part of the structure of the second embodiment in an enlarged manner.

FIG. 9 is a perspective view showing the structure and operation of a conventional mirror-polishing polishing body.

10 is a sectional view taken along line CC of FIG. 9 showing the structure and action of a conventional mirror-polishing polishing body.

[Explanation of symbols] 3 fibers 4 ditch 8 notches

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[Procedure amendment]

[Submission date] November 27, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

Claims (4)

[Claims] 1. A rotary polishing machine is mounted on a pad of a rotary polishing machine via a hook-and-loop fastener, and a plurality of parallel ditches are provided by fibers on the surface of a disk-shaped substrate, and the fibers are raised to form a flat polishing surface. A polishing body for mirror-polishing, which is formed and has a peripheral edge portion having a smaller dimension in a direction perpendicular to the ditch direction in order to prevent scratches on a surface to be polished. 2. The polishing body for mirror polishing according to claim 1, wherein a sponge is attached to the back surface of the base material with an adhesive. 3. The polishing body for mirror polishing according to claim 1, wherein a sponge is attached to the back surface of the base material via a surface fastener. 4. The mirror-polishing according to claim 1, wherein the periphery of the joining portion of the surface fastener A surface is ground into an annular shape, and a protrusion is formed in the direction of rotation at the tip of the hook portion cut off. Polished body.