JP2613147B2 - Bowl-shaped polished disc and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bowl-shaped abrasive disc having a glass wool net as a substrate.

[0002]

2. Description of the Related Art Disc-shaped abrasive discs in which abrasive grains are adhered to a glass wool net whose outer periphery is cut out in a circular shape through a binder are known. However, this conventionally known one has a flat plate shape and is not a three-dimensional type.

[0003] Further, there is also known a polishing disk having a flat bottom and a peripheral portion inclined in a frustoconical shape, and having a bowl-like shape as a whole. However, since the base material is not disposed in the peripheral frusto-conical portion, the conventionally known structure is weak in strength and cannot withstand a large load.

[0004]

The present invention has a bowl shape as a whole, and a common glass wool net is arranged on both the bottom disk portion and the substantially frustoconical portion around it. It is intended to provide a bowl-shaped abrasive disc.

[0005]

The present invention will be described with reference to the drawings. The bowl-shaped polishing disk according to the present invention is a bowl-shaped polishing disk 20 comprising a disk portion 21 and a substantially frusto-conical portion 23 formed by arranging a spherical portion 22 around the disk portion 21. A plurality of glass wool nets 11 in which fibers are arranged in a lattice shape are stacked so that the lattices sequentially intersect, and at least each glass wool net 11 of the substantially frustoconical portion 23 is cut from the outer peripheral side at equal angular intervals. 13, a binder 17 is disposed on a base material, and abrasive grains 18 are attached thereto.

Further, in the method of manufacturing a bowl-shaped polishing disk according to the present invention, a wedge-shaped cut 13 is formed from a vertex of a regular polygon of a glass wool net 11 constituted by arranging glass fibers 10 vertically and horizontally in a grid pattern. A single net sheet 16a with a center hole 15 in the shape of the piece 14 is formed, and the abrasive grains 1
8, a plurality of net sheets to which the abrasive grains 18 have been attached are stacked with the cutting positions 13 shifted from each other, and pressed into a bowl shape by being sandwiched between molds.

In this case, the glass wool net 1
Instead of forming a net sheet unit 16a with a center hole 15 in a shape formed by inserting a wedge-shaped cut 13 from the vertex of the regular polygon 1 and forming a wing piece 14, the glass wool net 11 is equiangularly spaced from the outer peripheral side of the circle. In some cases, a net sheet unit 16a having a center hole 15 in which a wedge-shaped cut 13 is formed in the radial direction to form a wing piece 14 may be formed.

Further, the abrasive grains 18 adhered to the plurality of net sheets 16a may be abrasive grains having different properties.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 10 denotes a glass fiber, and 11 denotes a glass wool net formed by arranging the glass fibers 10 in a matrix in a matrix. As shown in FIG. 1, the glass wool net 11 is cut into a shape in which a wedge-shaped cut 13 is formed from a vertex of a regular polygon 12, for example, a regular octagon, to form a wing piece 14, and a center hole 15 is provided. A unit 16 is formed.

As shown in FIG. 5, the net sheet 16a is inserted into two upper and lower horizontal rollers 30,31.
A thermosetting liquid binder 17a, such as bakelite, in which the lower portion of the lower roller 31 is immersed, adheres to the net sheet 16a as the lower roller 31 rotates.

As shown in FIG. 6, the thermosetting liquid binder 17
Net sheet unit 16 in which “a” is dried and becomes binder material 17b
a is placed horizontally, the abrasive grains 18 are scattered and adhered from above, and then turned over as shown in FIG. 7 to scatter and adhere the abrasive grains 18 to the other surface.

As shown in FIGS. 8 and 9, a plurality of abrasive grain-attached net sheet units 16a are shifted to the cuts 13 to form a stacked flat net sheet unit 16.

As shown in FIG. 10, the net sheet unit 16 is placed on a lower mold 32 for a bowl-shaped object. Pressure molding is performed to form an uncured bowl-shaped product 20a.

As shown in FIG. 11, an uncured bowl-shaped product 20 is formed.
a is put into a heating furnace 34, and the raw dry binder 17b is solidified, and then taken out of the heating furnace 34 and cooled, whereby the bowl-shaped polishing disk 20 is completed as shown in FIGS.

After being taken out of the heating furnace as necessary, the edge of the bowl is finished.

As shown in FIG. 1, a glass wool net 11
A wedge-shaped cut 13 from the vertex of the regular polygon
Instead of forming the net sheet unit 16a with the center hole 15 having the shape of the wedge 4, a wedge-shaped cut 13 is made in the radial direction at equal angular intervals from the circular outer peripheral side of the glass wool net 11, as shown in FIG. In some cases, a net sheet unit 16a having a center hole 15 in the shape of the wing piece 14 is formed.

Further, the abrasive grains 18 to be attached to the plurality of net sheets 16a constituting the net sheet unit 16 may be made to have different properties for each of the net sheets 16a.

[0018]

According to the present invention, when a bowl-shaped polishing disk is to be manufactured using a single circular glass wool net as a base material, wrinkles are generated at a portion curved in an arc shape, so that a polishing disk that can be actually used can be manufactured. I could not do it.

However, according to the present invention, a single glass wool net can be wrapped around the entire area of the bowl shape, and the polishing portion of the polishing disk can be thinned, so that flexibility is improved, heat radiation is improved, and strength is improved. Also excellent in durability,
In addition, it can be used as a bowl-shaped polishing disk which is harder than conventional ones.

According to the present invention, thin polishing can be performed, the undulation of the polished surface is small, and a beautiful finished surface can be obtained.

When two types of abrasive grains are used, the same abrasive disk can be used when scraping a scratch on a stainless steel product or a cast article.

[Brief description of the drawings]

FIG. 1 is a plan view of a glass wool net.

FIG. 2 is a plan view of a glass wool net having another shape.

FIG. 3 is a front view of a glass wool net.

FIG. 4 is a partially enlarged plan view of the glass wool net.

FIG. 5 is a front view showing a state in which a liquid binder is attached to a glass wool net.

FIG. 6 is a front view showing a state where abrasive grains are attached to one surface of a glass wool net.

FIG. 7 is a front view showing a state where abrasive grains are attached to the other surface of the glass wool net.

FIG. 8 is a front view of the net seat unit.

FIG. 9 is a plan view of the net seat unit.

FIG. 10 is a front view showing a state where an uncured bowl-shaped product is formed from a net sheet unit.

FIG. 11 is a front view showing a state in which a bowl-shaped abrasive disc is made from an uncured bowl-shaped product.

FIG. 12 is a front view of a bowl-shaped polishing disk.

FIG. 13 is a bottom view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Glass fiber 11 Glass wool net 13 Cut 14 Wing piece 15 Center hole 16 Net sheet unit 16a Net sheet unit 17 Binder 17a Liquid binder 17b Dry binder 18 Abrasive grain 20 Bowl-shaped polishing disk 20a Uncured bowl-shaped product 21 Disc part 22 Spherical part 23 Substantially frustoconical part 30 Roller 31 Roller 32 Lower die 33 Upper die 34 Heating furnace

Claims (4)

(57) [Claims] 1. A disk part (21) and a spherical part (2) around the disk part (21).
2) a bowl-shaped polishing disk (20) consisting of a substantially frusto-conical portion (23) formed and arranged, wherein the base material is a glass wool net (10) in which glass fibers (10) are arranged in a lattice. 11) are formed by laminating a plurality of lattices so as to intersect sequentially, and at least cuts (13) are made in the glass wool nets (11) of the substantially frustoconical portion (23) from the outer peripheral side at equal angular intervals. A bowl-shaped polishing disk, characterized in that a binder (17) is arranged on a substrate and abrasive grains (18) are attached thereto. 2. A wedge-shaped cut (13) is made from a vertex of a regular polygon of a glass wool net (11) constituted by arranging glass fibers (10) vertically and horizontally in a lattice form to form a wing piece (14). A net sheet unit (16a) having a center hole (15) having the formed shape is formed, and abrasive grains (18) are attached to the flat net sheet unit (16a) via a binder (17). A method for producing a bowl-shaped abrasive disc, characterized by laminating a plurality of single net sheets to which a sheet is attached with the cutting positions (13) shifted from each other, and pressing the mold into a bowl shape by sandwiching the molds. 3. Wedge-shaped cuts (13) are made radially at equal angular intervals from the outer peripheral side of a circular shape of a glass wool net (11) in which glass fibers (10) are arranged vertically and horizontally in a grid pattern. A single net sheet (16a) having a center hole (15) in the shape of a piece (14) is formed, and abrasive grains (18) are attached to the flat single net sheet (16a) via a binder (17). Characterized in that a plurality of single net sheets having abrasive grains (18) attached thereto are displaced from each other at a cutting position (13), overlapped with each other, and pressed into a bowl shape by being sandwiched between molds. Manufacturing method. 4. The method for producing a bowl-shaped polishing disk according to claim 2, wherein the abrasive grains adhered to the plurality of net sheets alone are abrasive grains having different properties.