JPH01321169A - Method and device for manufacturing polishing tool - Google Patents

Abstract

PURPOSE:To efficiently produce a polishing tool with a constant quality by feeding long-size polishing belts which are radially arranged toward a center direction and, after superposing the belts on a disk, bonding the polishing belts to the disk via a heat sensitive adhesive which melts by means of a heating seat and a heating/ pressurizing device, and cutting off the portions outside the peripheral edge of disk of the polishing belts. CONSTITUTION:A heat sensitive adhesive is laid on the whole face of the peripheral edge on the back, or the top side of a disk 1, which is placed on a seat 11. Then, after feeding a polishing belt 18 in each guide 19 by a certain stroke by means of a feeding device 21, the polishing belts 18 are pressed against the disk 1 both being interposedly pressed between a lowering heating/pressurizing device 12 and the heating seat 11 to bond each polishing belts 18 to the disk 1 via the heat sensitive adhesive which melts by the heating. At the time of this interposed pressing, the outside portions on the outer peripheral edge of the disk of the polishing belts which are radially arranged while being superposed on the disk 1 are cut off by means of a cutting device 26. After that, the heating/pressurizing device 12 is lifted up and the bonded disk of a polishing sheet is taken out of the heating seat 11 to obtain a desired polishing tool.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method and apparatus for manufacturing a polishing tool in which a large number of polishing sheets are arranged and assembled in a radial manner.

[Conventional technology]

As shown in FIG. 1O, the conventional polishing tool has an annular polishing plate 52 formed by overlapping the side edges of a large number of rectangular polishing sheets 51 and radially arranging them together, and a through hole for a drive shaft in the center. The disc 53 is made of fiberboard or the like and is bonded to one side of the annular polishing Fi 52 with an adhesive.

[Problem to be solved by the invention]

When manufacturing a polishing tool with the above configuration, the polishing sheets are manually inserted one by one into the radial grooves on the top surface of the jig, and when the sheets are lined up, adhesive is applied to the back side of the radial polishing sheets. Stack the coated discs.

This rounded disc is pressed toward the jig by tightening a nut that is screwed onto a screw shaft that projects upward from the center of the jig and penetrates through the center through hole of the disc, and is pressed toward the jig. Since the abrasive sheet is sandwiched between the disks, the nut is removed after the adhesive has hardened, and the jig is recovered, it is time-consuming and cannot be mass-produced, resulting in a significant increase in costs.

Also, since the cut rectangular abrasive sheets are arranged radially,
One corner of the edge facing the outer circumferential direction of the polishing sheet protrudes as shown in Fig. 1θ, so the protruding corner may damage the surface rising from the polishing surface, or the protruding corner may curl and cause the polishing. There were problems such as covering the grain surface.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention includes a disc having a through hole in the center with the back side facing up on the heating receiver, and a heat-sensitive adhesive that overlaps the adhesive part around the entire back surface of the disc. After supplying the polishing strips, long polishing bands arranged radially outside the entire periphery of the disk are fed in a constant stroke direction so that the abrasive grain surface is on the upper side and the side edges overlap each other. , Then, while pressing the assembled abrasive bands with a heating pressurizer, they are adhered to the disk via the heat-sensitive adhesive, and under pressure, the outside portion of the disk's outer periphery of each abrasive band is attached to a cylindrical blade. A manufacturing method of a polishing tool characterized in that after cutting with a rotary blade or a rotating blade, the pressure applied by a heating pressurizing body is released to take out a fixed disk of each polishing sheet, and a disk forming mother plate is placed on a heated seat. After supplying the disc material and the heat-sensitive adhesive onto the mold and the matrix, a long polishing band arranged radially outside the entire circumference of the disc material is applied, with the abrasive grain side facing upward. Then, the disk material is fed in the direction of the center of a certain stroke so that the side edges overlap each other, and then the disk material is formed into a disk shape while pressing the abrasive band in the aggregated state with a heating pressurizer. , and adhered to the formed disc using a heating adhesive, and after cutting the outer peripheral edge of the disc of each polishing body under pressure with a cylindrical blade or a rotating blade, pressurization with a heating pressurizing body was performed. A method for manufacturing a polishing tool, characterized in that the fixed disk of each polishing sheet is released and the fixed disk of each polishing sheet is taken out.

[Effect]

Heat-sensitive adhesive is applied to the entire peripheral edge of the back surface, which is the upper side of the disk, and the disk is placed on the seat.

Next, the abrasive band in each guide is sent out at a constant flow rate by the feeding device, and then the descending heating pressure device and the heating seat press the abrasive band against the disk, and the adhesive melts by heating. Each abrasive band is adhered to the disc via a bonding agent.

During the above-mentioned clamping, a cutting device cuts the outer portion of the outer peripheral edge of the disc of each polishing band.

Thereafter, the heating and pressing device is raised, and the adhesive disc of the polishing sheet is pushed out from above the heating seat to obtain a polishing tool.

〔Example〕

In the figure, reference numeral 11 denotes a heating seat, and above the heating seat 11, a heating and pressurizing device 12 is provided so as to be movable up and down.゛The above heating seat 11 is installed on the table 13 in the case shown, and the heating and pressurizing device 12 is installed on the cylinder 15 installed on the frame 14 in the case shown, and at the tip of the piston shaft of this cylinder 15. The pressure plate 16 is made up of an attached circular pressure plate 16, and the pressure plate 16 is lowered onto the receiving seat 11 by the expansion action of the cylinder 15.

In addition, the method of heating the heating seat 11 and the heating and pressurizing device 12 is such that, in the case shown in the figure, a heater 17 is installed inside the heating seat 11 and the pressure plate 16, respectively, to raise the temperature to a predetermined temperature. .

Furthermore, on each radial line outside the entire circumference of the heating catcher 11, there are a large number of guides guided so that the abrasive grain surface on one side of the elongated polishing band 18 is on the upper side, and the opposing side edges overlap at the top and bottom. 19 are provided.

As shown in FIG. 2, the guide 19 described above uses a channel-shaped member and is arranged radially with the opening facing upward, and the long polishing band 18 is wound on a roll as shown in FIG. , and is supported by a pedestal 20.

Each of the polishing bands 18 described above is fed by a feeding device 21 along a predetermined length at the center.

The above-mentioned feeding device 21 includes an inverted r-shaped arm 23 which is raised by a first cylinder 22 in the case shown in the figure, and this arm 23.
The second cylinder 24 is supported at the tip of the second cylinder 24, and a pawl 25 is provided at the tip of the piston shaft of the second cylinder 24. After pressing the pawl 25, the abrasive band 18 is fed through the pawl 25 which slides forward toward the center due to the extension action of the second cylinder 24, and after the feeding is completed, the first cylinder 22 is made to extend and the pawl 25 is moved upward. , then the claw 2 is compressed by the contraction action of the second cylinder 24.
5 is retracted, but roll feeding or the like may also be adopted.

Furthermore, each polishing band 18 fed by the feeding device 21
is cut by the cutting device 26.

The above cutting device 26 includes a cylindrical blade 27 fitted on the outside of the heating seat 11 and supported on the table 13 in the illustrated case;
It is composed of a cylindrical blade support material 28 fitted on the outside of the pressure plate 16 and supported by the pressure plate 16, and the abrasive band 18 is pressed against the cylindrical blade 27 by the blade support material 28 for cutting. However, instead of the cylindrical blade 27, a movable blade (not shown) may be rotated for cutting.

In addition, as shown in the figure, a plurality of through holes 29 are provided at the peripheral edge of the heating catch 11, and pins 31 which are set up from above the table 13 are passed through the through holes 2s, and the upper surfaces of the heating catch 11 and the table 13 are passed through the through holes 2s. A spring 32 is fitted on the outside of the pin 31 between the heating seat 11 and the upper end retaining head 30 of the pin 31.
When the abrasive band 18 is pressed against the cylindrical blade 27 by the blade support member 28, the heating seat 11 is pushed downward and the abrasive band 18 can be cut smoothly.

Next, a method for manufacturing a polishing tool using the manufacturing apparatus having the above configuration will be described.

First, a disk 1 made of metal, fiberboard, or the like is placed 2 on the heating seat 11 with the back side facing upward.

At this time, the pin 3 erected from the center of the upper surface of the heating seat 11
3 is passed through the center through hole 2 of the disc 1 to position the disc 1.

Further, the heat-sensitive adhesive 3 is applied to the entire surface of the peripheral edge of the back surface of the disk 1 in a layered manner in advance, either simultaneously or separately.

Next, each polishing band 18 is sent toward the center by the feeding device 21, so that the leading edge of each polishing band 18 reaches a predetermined position in front of the through hole 2.

Thereafter, the pressure plate 16 of the heating and pressurizing device 12 is lowered to press the disc 1 and each polishing band 18 onto the heating seat 11 to apply pressure, and the heat-sensitive adhesive 3 is melted by the heater 17. Each abrasive band 18 is adhered to.

At this time, a portion of each polishing band 18 outside the periphery of the disk 1 is cut by the cutting device ff126.

Thereafter, the pressure plate 16 is raised and the disc 1 is taken out from above the heating seat 11 to be attached to the polishing sheet, thereby obtaining the polishing tool B as shown in FIG.

Next, a method of manufacturing the polishing tool shown in FIG. 9 will be explained.

First, the matrix 4 is placed on the heating seat 11.

As shown in FIG. 8, this mother die 4 is made of a material with good thermal conductivity so as to be heated by the heat of the heating seat 11, and has a forming surface portion 4' for forming a disk on its upper surface. It is provided.

Further, as shown in FIG. 8, a disk material disk and a heat-sensitive adhesive 3 are previously supplied onto the mother die 4. As shown in FIG.

For the disc material 5, for example, a net made of glass fibers made of sheets or stacked one on top of the other is used, and the heat-sensitive adhesive 3 can be applied by sprinkling powder, placing a plate-like material, or attaching the net between the nets. intervene.

When each polishing band is fed in the same manner as described above, then pressurized, and cut by the cutting device 26, a polishing tool B with the polishing sheet A adhered to the disc material that will become a disc (as shown in FIG. 9) is produced. can get.

〔effect〕

As described above, according to the method and apparatus for manufacturing a polishing tool according to the present invention, long polishing bands arranged radially are sent toward the center, stacked on a disk, and then heated by a heating and pressurizing device. The disk and polishing band are pressed onto the seat, and the polishing band is bonded to the disk using a heat-sensitive adhesive that is melted by the heat of the heated seat and the heating press device. By cutting the parts, the production of the polishing tool is significantly improved and a uniform product can be obtained.

Furthermore, since the abrasive band is cut by a cylindrical blade or a rotating blade, it is possible to eliminate the problem of one corner of the outer peripheral edge of the abrasive sheet protruding.

Further, a mother mold for forming a disk is placed on the heating seat, a disk material and a heat-sensitive adhesive are supplied onto this mother mold, and each abrasive band is fed to form the disk material into a disk-side-up shape. The abrasive bands are glued to the shaped discs, and then the portions of each abrasive band that protrude from the periphery of the disc are cut, thereby forming a disc and obtaining an abrasive tool with an abrasive sheet adhered to the formed disc. be able to.

[Brief explanation of the drawing]

The drawings show an embodiment of the apparatus for manufacturing a polishing tool according to the present invention, in which Fig. 1 is a partially cutaway front view, Fig. 2 is a cross-sectional plan view of the same, and Fig. 3U; J is an enlarged vertical front view showing the main parts of the same as above, FIG. 4 is a vertical front view when pressurized, FIG. 5 is a partially cutaway perspective view of the polishing tool manufactured in the above, and FIG. 7 is an enlarged bottom view of the same, FIG. 8 is a longitudinal sectional front view showing another embodiment, FIG. 9 is a perspective view of the polishing tool obtained in the above, and FIG. 10 is a diagram of the conventional polishing tool. It is an enlarged bottom view. 1...Disk, 2...Through hole, 3...Thermosensitive adhesive, 4...
...Mother mold, 5...Disc material, 11.
... Heating catch, 12 ... Heating pressure device,
13...Table, 14...Beam frame, 15...Cylinder, 16...
...Pressure plate, 17...Converter,
18... Polishing band, 19...
・Guide, 20... Frame, 21・
...Feeding device, 22...First cylinder,
23... Arm, 24... Second cylinder, 25... Claw, 26... Cutting device, 27... Cylindrical blade, 28 ...
...Blade receiving material.

Claims (3)

[Claims] (1) After supplying a disc with a through hole in the center with one side facing up on the heating receiver and a heat-sensitive adhesive that overlaps the adhesive part around the entire back surface of the disc, Long abrasive bands arranged radially on the outside of the periphery are fed toward the center of a certain stroke so that the abrasive grain surface is on the upper side and the side edges overlap each other, and then The abrasive band is adhered to the disk via the heat-sensitive adhesive while being pressurized by a heating pressurizing body, and the outer peripheral edge of the disk of each abrasive band is cut with a cylindrical blade or a rotating blade under pressure.
A method for manufacturing a polishing tool, which comprises removing the fixed disk of each polishing sheet by releasing the pressure applied by the heating pressurizing body. (2) After supplying a mother mold for forming a disk on the heating seat and a disk material and a heat-sensitive adhesive on this mother mold, lengths arranged in a radial direction on the outside of the entire circumference of the disk material are provided. A long polishing band is fed in the direction of the center of a certain stroke so that the abrasive grain surface is on the upper side and the side edges overlap each other, and then the abrasive band in the aggregated state is pressed by a heating pressurizer. While pressing, the disc material is formed into a disc shape, and the disc material is bonded to the formed disc using a heated adhesive, and the outer peripheral edge of the disc of each abrasive body is cut with a cylindrical blade or a rotating blade under pressure. 1. A method for manufacturing a polishing tool, which comprises cutting the polishing tool by a heating pressurizer, and then releasing the pressure applied by a heating pressurizing body to take out the fixed disk of each polishing sheet. (3) a catch provided on the entire peripheral edge of the back surface to receive a circular plate having a through hole in the center with the heat-sensitive adhesive on the upper side;
A feeding guide for a long polishing body is provided on each radial line outside the entire circumference of this seat, and the abrasive grain surface on one side is on the upper side, and the opposing side edges overlap at the top and bottom, and inside each guide. A feeding device is provided to feed the long abrasive band onto the top of the heat-sensitive adhesive at a constant stroke, a heating and pressurizing device is provided which is movable up and down to press the abrasive band onto the disk, and the above-mentioned pressure An apparatus for manufacturing a polishing tool, comprising a cutting device that cuts the outer portion of the outer peripheral edge of the disc of each polishing band when pressure is applied by the device.