KR20060024016A - Abrasive disk and the manufacturing method - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing disk, wherein the substrate of the polishing disk is made of SMC, so that when a high temperature occurs during polishing of a working surface such as a metal surface, the substrate is flexible and flattened. The center and the edge have the effect of polishing the surface of the metal evenly.

SMC, polishing, sandpaper

Description

Abrasive disk and its manufacturing method {abrasive disk and the manufacturing method}

1 is a perspective view showing an abrasive disk according to a first embodiment of the present invention.

Figure 2 shows a cross section of the abrasive disc according to figure 1;

3 shows a cross section of an abrasive disc according to a second embodiment of the invention;

4 shows a cross section of an abrasive disc according to a third embodiment of the invention;

*** Explanation of symbols for main parts of drawing ***

100: abrasive disc 110: substrate

120: sandpaper 130: adhesive

140: abrasive

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing disk and a method of manufacturing the same, and more particularly, to a polishing disk which is flattened by frictional heat during polishing to widen the work area and detaches while the substrate is finely and evenly worn. It is about a method.

Generally, abrasive discs are used to perform polishing operations on metal surfaces in order to smooth the rough surface of metal materials used in the manufacture of mechanical parts or products or to remove machining bits of the surface.

Such a conventional abrasive disk is usually made in the shape of a disk (disk) and is formed by applying an adhesive resin on the upper surface of the substrate made of a vulcanized fiber material to form an adhesive layer, and spraying and drying the abrasive thereon And a method of attaching sandpaper (sandpaper) to the upper surface of the substrate using an adhesive resin.

However, such a conventional polishing disk is rotated while the polishing disk is inclined at a certain angle when polishing the working surface such as the surface of the metal because the substrate is made by using the vulcanized fiber material of the substrate is rotated Because of this, when used for a long time, it will be worn away from the edges of the abrasive disc and will fall off. If the particles of the substrate or abrasive material that are falling off are splashed like debris, this may cause injury to the abrasive worker. Had

In addition, the work efficiency is deteriorated due to wear out from the edge of the polishing disk, and even after a certain time, the center portion has to be replaced despite being in a circular shape, and thus, the replacement cycle of the polishing disk is shortened.

In addition, the polishing disk is typically rotated at 10,000 rpm or more, the substrate is thin, the vibration is transmitted to the operator as it is due to the repulsive force of the substrate during polishing operation, fatigue accumulates, resulting in a decrease in work efficiency.

 Accordingly, an object of the present invention is to provide a polishing disk having a structure in which the polishing disk is flattened during rotation, so that the polishing disk can polish the surface of the metal evenly at the center and the edge thereof. .

In addition, another object of the present invention is to provide a polishing disk having a structure capable of maximizing the work efficiency by minimizing the transmission of vibration due to the rotation of the polishing disk to the operator while the substrate is finely detached when the polishing disk rotates. To provide.

In addition, the present invention provides a method for producing such an abrasive disk.

The present invention relates to an abrasive disk; It is made by attaching sandpaper to the upper surface of the disk-shaped base material made of SMC material by thermocompression method, or by attaching sandpaper to the upper surface of the disk-shaped base material made of SMC material with adhesive of either waste paper or epoxy resin, or SMC It is characterized in that it is formed by applying any one of the adhesive agent of the waste ballast resin or the epoxy resin to the upper surface of the disk-shaped base material made of a material, and then, after spraying the abrasive.

The present invention also relates to a method for producing an abrasive disk; It is characterized in that the sandpaper on the upper surface of the substrate processing the disc of the SMC material using a heat press is thermally pressed for about 1 minute in a temperature range of 120 ~ 130 ℃ using a dry press.

With reference to the accompanying drawings, a polishing disk and a method for manufacturing the same according to the present invention will be understood by the embodiments described in detail below.

1 is a perspective view showing a polishing disk according to a first embodiment of the present invention, Figure 2 is a view showing a cross section of the polishing disk according to Figure 1, Figure 3 is a polishing according to a second embodiment of the present invention 4 is a cross-sectional view of the disc, and FIG. 4 is a cross-sectional view of the abrasive disc according to the third embodiment of the present invention.

1 and 2 illustrate a polishing disk according to a first embodiment of the present invention, in which the polishing disk 100 according to the present invention is made of a disk shape, but is formed of an SMC material 110; The sandpaper (sandpaper) 120 is adhered to the upper surface of the substrate 110 by thermocompression bonding for about 1 minute in a temperature range of 120 to 130 ° C. using a known heat press.

Hereinafter, each of the above components will be described in more detail.

First, SMC (Sheet Molding Compound) used as the substrate 110 is impregnated with a reinforcing material and filler, a releasing agent, a pigment, a catalyst, etc. in an unsaturated polyester resin (Unsaturated Polyester resin) and then the moldability chemically increased viscosity It is a press-formed product on a good sheet, and is mainly used for electric parts. It uses the product name 'G-700' sold by Sewon Hwasung Co., Ltd. in Korea.

At this time, the 'G-700' is a product having the physical properties as shown in Table 1 below has excellent dimensional accuracy and dimensional stability, less deformation, small coefficient of thermal expansion, excellent heat resistance, mechanical strength and electrical performance great.

TABLE 1

Item unit result Flexural strength ㎏ / ㎠ 20.0 Flexural modulus ㎏ / ㎠ 1,100 The tensile strength ㎏ / ㎠ 7.5 Compressive strength ㎏ / ㎠ 60.0 Impact Strength (IZOO) Kgcm / cm2 36 or more Barcol Hardness (934-1) 55 or more G / F content % 25% Oxygen index 25.4

Meanwhile, the sandpaper 120 is commonly referred to as abrasive paper or abrasive cloth, and the abrasive cloth or abrasive paper is composed of mineral and backing. The same means abrasive grains of sand and the like, and backing means paper or textiles on which minerals are attached.

Therefore, when the backing is paper, it is called abrasive paper, and when it is made to be more durable by bonding the fabric to paper, it is called abrasive cloth. At this time, in order to use for industrial use, it is preferable to use an abrasive cloth.

On the other hand, the mineral may be used for diamond to function as an abrasive, but since it is expensive (high), aluminum oxide, silicon carbide, alumina zirconia, etc. are mainly used, these have a Mohs hardness of about 8 to 9, next to diamond It is a hard mineral.

Substrate 110 made of such SMC has a flexibility that is processed into a disk shape of the desired size using a mold and then press the sandpaper 120 to the substrate 110 using a heat press (not shown) After attaching in a manner that is naturally cooled to produce and complete the polishing disk 100 according to the present invention.

On the other hand, when performing the polishing operation of the working surface of the metal using the polishing disk 100 prepared as described above, the polishing disk 100 is rotated at 10,000 rpm or more, the surface of the metal substrate 110 is the working surface High heat is generated upon contact with the softener and flattened by centrifugal force so that the center and edge of the sandpaper 120 are evenly contacted with the working surface to polish the metal surface, so that the sandpaper and the substrate are evenly finely detached.

On the other hand, even if the substrate 110 is flexible and the polishing disk 100 rotates to absorb the vibration is reduced to be transmitted to the operator can be expected to reduce the fatigue of the operator.

3 is a view illustrating a polishing disk according to a second embodiment of the present invention, in which the polishing disk 100 is made of the same disk shape as in the first embodiment, but is made of SMC material 110. And, the sandpaper 120 is attached to the upper surface of the substrate 110. At this time, instead of using a thermocompression method, to form an adhesive layer 130 made of any one of the adhesives of waste or resin or epoxy resin to attach to do.

That is, after the adhesive 130 is applied to the upper surface of the disk-shaped substrate 110, the sandpaper 120 is attached and then naturally dried to prepare the polishing disk 100 according to the present invention.

Figure 4 is a view showing a polishing disk according to a third embodiment of the present invention, according to the polishing disk 100 according to the present invention is made of a disk shape, but the adhesive on the upper surface of the substrate 110 made of SMC material After applying to form the adhesive layer 130, the abrasive 140 is sprayed by an electric or drop coating method and then naturally dried to complete.

At this time, the adhesive 130 is made of any one of the resin used waste resin or epoxy resin.

In addition, the abrasive 140 may use any one of alumina (Al ₂ O ₃ ), silicon carbide (SiC), alumina zirconia (AZ), ceramic, diamond, and cubic boron nitrile (CBN), and at least two of them. It can be used in combination, the particle size is preferably used having a 16 to 2000 mesh (mesh).

As described above, embodiments of the present invention have been described in detail, but the scope of the present invention is not limited thereto, and the scope of the present invention extends to the range substantially equivalent to the embodiments of the present invention.

As described above, the polishing disk 100 according to the present invention comprises the material of the substrate 110 by SMC, so that the substrate 110 contacts the working surface when polishing a working surface such as a metal surface. Therefore, when high heat is generated, it is flexible and flattened, so that the center and the edge of the polishing disk have an effect of polishing the surface of the metal evenly.

In addition, since the base 110 of the abrasive disc 100 is evenly worn out, the replacement cycle of the abrasive disc 100 is long because the base disc of the abrasive disc 100 is evenly worn out.

In addition, since the substrate 110 is flattened during the polishing operation, even when the polishing disk rotates at a high speed, the substrate 110 absorbs the repulsive force caused by the vibration, thereby minimizing the transmission of vibration to the worker, thereby maximizing the work efficiency. There is.

Claims (5)

An abrasive disk comprising a sandpaper (120) attached to an upper surface of a disk-shaped substrate (110) made of SMC material by thermocompression bonding. Characterized in that the sandpaper (120) on the upper surface of the substrate 110, the disc of the SMC material in the shape of a disk using a heat press is thermally pressed for about 1 minute in a temperature range of 120 ~ 130 ℃ and dried Method of making abrasive discs. An abrasive disk comprising a sandpaper (120) attached to an upper surface of a disk-shaped base material (110) made of an SMC material with any one of an adhesive agent of waste paper or epoxy resin. After the adhesive layer 130 is formed by coating any one of the adhesives of the waste paper or epoxy resin on the upper surface of the disk-shaped substrate 110 made of SMC material, the abrasive 140 is sprayed and then dried. Polishing discs. The method of claim 4, wherein The abrasive 140 is one of alumina (Al ₂ O ₃ ), silicon carbide (SiC), alumina zirconia (AZ), ceramic, diamond, CBN (cubic boron nitrile) characterized in that any one of the abrasive disk.

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