JPH05162084A - Bowl shaped polishing disc and manufacture thereof - Google Patents

Abstract

PURPOSE:To embed glass wool net as base material over the whole face in a bowl shaped polishing disc so as to improve flexibility. CONSTITUTION:This bowl shaped polishing disc 20 is constituted of a disc part 21 and a nearly truncated cone shaped part 23 formed by arranging a spherical part 22 on the circumference of the disc part. The base material is constituted by laminating a plurality of glass wool nets arranged into lattice out of glass fiber so as to mutually cross the lattice in order. The glass wool net in nearly truncated cone part 23 is wedge-likely cut in from the outer circumferential side at equal angular intervals, and bonding material 17 is arranged on the base material so as to have abrasive grains 18 bonded thereon.

Description

Detailed Description of the Invention

[0001]

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

[0002]

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

Further, there is also known a polishing disk having a flat bottom and a peripherally inclined frustoconical shape, and a bowl shape as a whole. However, since the base material is not arranged in the frusto-conical portion in the periphery of this conventionally known one, it is weak in strength and cannot withstand a large load.

[0004]

DISCLOSURE OF THE INVENTION The present invention has a bowl shape as a whole, and a common glass wool net is arranged on both of the disk portion at the bottom and the substantially frustoconical portion at the periphery. It is intended to provide a bowl-shaped abrasive disc.

[0005]

A means for solving the problems 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 including a disk portion 21 and a substantially frustoconical portion 23 formed by arranging a spherical surface portion 22 around the disk portion 21, and the base material is glass. A plurality of glass wool nets 11 in which fibers are arranged in a lattice are stacked so that the lattices intersect each other, and at least approximately each frusto-conical portion 23 is cut from the outer peripheral side at equal angular intervals in each glass wool net 11. 13 is put in, the bonding material 17 is arranged on the base material, and the abrasive grains 18 are attached.

Further, according to the method for manufacturing a bowl-shaped polishing disk according to the present invention, a wedge-shaped notch 13 is inserted from the apex of a regular polygon of a glass wool net 11 constituted by arranging glass fibers 10 in a matrix in a matrix. The net sheet simple substance 16a with the center hole 15 in the shape of the piece 14 is formed, and the flat grain net sheet simple substance 16a is bonded to the flat net sheet simple substance 16a through the bonding material 17 to form the abrasive grains 1
8 is attached, a plurality of net sheets to which the abrasive grains 18 are attached are overlapped with the cutting positions 13 shifted from each other, and the net sheets are sandwiched in a mold and pressure-molded into a bowl shape.

In this case, the glass wool net 1
Instead of forming a net sheet unit 16a having a center hole 15 in which a wedge-shaped notch 13 is inserted from the apex of a regular polygon 1 and a wing piece 14 is formed, equiangular intervals are provided from the circular outer peripheral side of the glass wool net 11. In some cases, a wedge-shaped notch 13 is inserted in the radial direction to form a wing piece 14 to form a net sheet unit 16a with a central hole 15.

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

[0009]

EXAMPLE 10 is a glass fiber, and 11 is a glass wool net formed by arranging the glass fibers 10 in a matrix in the vertical and horizontal directions. As shown in FIG. 1, a glass wool net 11 is a flat net sheet having a regular polygonal shape 12, for example, a regular octagonal apex, a wedge-shaped notch 13 formed therein to form a wing piece 14, and a central hole 15 provided therein. The unit 16 is formed.

As shown in FIG. 5, the net sheet simple substance 16a is inserted into the horizontal rollers 30 and 31 which are two stages above and below.
The thermosetting liquid binder 17a such as Bakelite, which is immersed in the lower portion of the lower roller 31, adheres to the net sheet simple substance 16a as the lower roller 31 rotates.

As shown in FIG. 6, a thermosetting liquid binder 17
Net sheet unit 16 in which a is a dry-drying binder 17b
A is placed horizontally, and the abrasive grains 18 are sprinkled and adhered from above, and then, as shown in FIG. 7, it is turned over and the abrasive grains 18 are sprinkled and adhered to the other surface.

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

As shown in FIG. 10, the net sheet unit 16 is placed on the bowl-shaped lower molding die 32, and the bowl-shaped upper molding die 33 is lowered and pressure-bonded to the bowl-shaped non-heating. Pressure molding is performed to make an uncured bowl-shaped shaped product 20a.

As shown in FIG. 11, an uncured bowl-formed product 20
When a is put into the heating furnace 34 and the binding material 17b is dried and solidified and then taken out from the heating furnace 34 and cooled, the bowl-shaped polishing disk 20 is completed as shown in FIGS. 12 and 13.

If necessary, the bowl-shaped edge surface is finished after being taken out from the heating furnace.

As shown in FIG. 1, glass wool net 11
Wedge 1 with a wedge-shaped cut 13 from the apex of the regular polygon
4, instead of forming the net sheet unit 16a having the central hole 15 having the shape of 4, the wedge-shaped notches 13 are formed in the radial direction from the circular outer peripheral side of the glass wool net 11 at equal angular intervals as shown in FIG. The net sheet unit 16a with the center hole 15 in the shape of the wing piece 14 may be formed.

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

[0018]

EFFECTS OF THE INVENTION When a round glass wool net is used as a base material and wrinkle-shaped polishing discs are to be made, wrinkles are generated in the portion that is curved in an arc shape, so that a polishing disc that can be actually used can be manufactured. I could not do it.

However, according to the present invention, since the glass wool net consisting of one sheet is laid along the entire range of the bowl shape, and the polishing portion of the polishing disk can be made thin, the flexibility is improved and the heat dissipation is good, and the strength is high. Excellent in durability and
Moreover, it can be used as a bowl-shaped polishing disk which is harder than the conventional one.

According to the present invention, thin polishing can be carried out, the polishing surface is less wavy, and a clean finished surface can be obtained.

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

[Brief description of 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 a glass wool net.

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

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

FIG. 7 is a front view showing a state in which 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 shaped article is produced from a net sheet unit.

FIG. 11 is a front view showing a state in which a bowl-shaped polishing disc is made from an uncured bowl-formed article.

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

FIG. 13 is a bottom view of FIG.

[Explanation of symbols]

 10 glass fiber 11 glass wool net 13 notch 14 wing piece 15 center hole 16 net sheet unit 16a net sheet simple substance 17 binding material 17a liquid binding material 17b raw dry binding material 18 abrasive grain 20 bowl-shaped polishing disk 20a uncured bowl forming product 21 Disc part 22 Spherical part 23 Substantially truncated cone part 30 Roller 31 Roller 32 Lower mold 33 Upper mold 34 Heating furnace

Claims (4)

[Claims] 1. A disk part (21) and a spherical part (2) around the disk part (21).
2) A bowl-shaped polishing disc (20) comprising a substantially frusto-conical portion (23) formed by arranging the glass fiber and the glass fiber (10) arranged in a lattice form. 11) is formed by stacking a plurality of grids so that the lattices intersect one after another, and at least each glass wool net (11) of the substantially frustoconical portion (23) is provided with notches (13) from the outer peripheral side at equal angular intervals. A bowl-shaped polishing disk, characterized in that a binder (17) is arranged on a base material and abrasive grains (18) are adhered thereto. 2. A winglet (14) is formed by inserting a wedge-shaped notch (13) from the apex of a regular polygon of a glass wool net (11) constituted by arranging glass fibers (10) in a matrix in a matrix. The net sheet simple substance (16a) with the formed central hole (15) is formed, and the abrasive grain (18) is attached to the flat net sheet simple substance (16a) through the bonding material (17) to form the abrasive grain (18). The method for producing a bowl-shaped polishing disc is characterized in that a plurality of net sheets each having the above (1) are stacked so that the cutting positions (13) are displaced from each other, and the sheets are sandwiched by a mold and pressure-molded into a bowl shape. 3. Wedges having wedge-shaped notches (13) radially arranged at equal angular intervals from a circular outer peripheral side of a glass wool net (11) constituted by arranging glass fibers (10) in a matrix in a matrix. A net sheet simple substance (16a) with a center hole (15) in the shape of the piece (14) is formed, and an abrasive grain (18) is attached to the flat net sheet simple substance (16a) via a bonding material (17). A bowl-shaped polishing disc characterized in that a plurality of net sheets having abrasive grains (18) attached are stacked at a cutting position (13) so as to be mutually shifted, sandwiched in a mold and pressure-molded into a bowl shape. Manufacturing method. 4. The method of manufacturing a bowl-shaped polishing disk according to claim 2, wherein the abrasive grains (18) attached to the plurality of net sheets (16a) are abrasive grains having different properties.