JP2001071275A - Grindstone for grinding cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grindstone for grinding cutters allowing finish grinding of a cutting edge. SOLUTION: This grindstone 8 for grinding cutters includes not only 5-15 vol.% diamond abrasive grains 16 each having a relatively fine grain size of #6000-#16000 but also 5-20 vol.% carbon graphite 20 having a mean grain size of 5-15 μm. Because a lubricating effect of the carbon graphite 20 and a polishing effect of the abrasive grains 16 are combined to form a smooth polished surface, finish grinding for a cutting edge is enabled to suitably give the edge. Because the grind stone 8 for cutters includes 5-20 vol.% of the carbon graphite 20 having a mean grain size of 5-15 μm, a color tone of the grind stone 8 becomes blackish similar to appearance of a natural grindstone for grinding cutters or a color tone of ground powder generated by grinding work. Accordingly, a visual state of the ground powder becomes similar to the case of use of the natural grindstone to prevent false decision of a grinding degree.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade for sharpening a cutting edge of a blade.

[0002]

2. Description of the Related Art Knife sharpening whetstones for sharpening the cutting edges of kitchen knives used for cooking and carpentry tools such as chisels, planes, swords and knives for regenerating sharpness are known. This blade sharpening stone is calculated naturally and is highly evaluated. A rough grinding stone, a medium grinding stone, and a finish sharpening stone are sequentially used and used to sharpen the blade.

[0003] By the way, with the depletion of naturally calculated grinding wheels, it becomes difficult and expensive to obtain high quality grinding wheels, and therefore, high quality artificial grinding wheels, especially There is a need for a grinding wheel for finish sharpening.

[0004]

On the other hand, it has been attempted to artificially construct a grindstone for sharpening blades by bonding fine artificial abrasive grains using a resin binder such as phenol resin or epoxy resin. Have been done. However, according to such an artificially configured sharpening wheel, it is possible to roughly grind the blade, but if it is used as a finish sharpening, scratches due to the friction of abrasive grains at the tip of the polished surface. Although formed, there is a drawback that sharpening of the cutting edge, that is, cutting, cannot be performed sufficiently.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a grindstone for sharpening the edge of a blade capable of finishing and sharpening the edge.

The present inventor has conducted various studies in order to achieve the above object. As a result, when carbon graphite, which functions as a solid lubricant, is dispersed in a grindstone, the lubricating action of the carbon graphite and the polishing of the abrasive grains are achieved. It has been found that a surprising fact that a smooth polished surface can be obtained in combination with the action and the sharpening of the cutting edge, that is, the sharpening can be suitably obtained.
The present invention has been made based on such findings.

[0007]

That is, the gist of the blade for sharpening a knife according to the present invention consists of 5 to 15% by volume of abrasive grains having a grain size of # 6000 to # 16000 and an average grain size of 5 to 15%. That is, 5 to 20% by volume of 15 μm carbon graphite is uniformly dispersed in the resin binder.

[0008]

In this way, the resin binder contains
In addition to containing 5 to 15% by volume of relatively fine abrasive grains having a grain size of # 6000 to # 16000, carbon graphite having an average grain size of 5 to 15 μm is 5 to 20% by volume.
Since the volume% is contained, a smooth polished surface is obtained by a combination of the lubricating action of the carbon graphite and the polishing action of the abrasive grains, so that the finish sharpening of the cutting edge can be performed, and the cutting edge can be suitably obtained. According to the present invention,
Carbon graphite having an average particle size of 5 to 15 μm
By containing 20% by volume or less, the color tone of the blade for sharpening the blade becomes darker and is similar to the appearance of a natural grinding wheel for blade sharpening and the color tone of the sharpening powder generated by the sharpening operation. This is the same as using a natural blade for sharpening a knife, and there is no mistake in determining the degree of sharpening.

[0009]

In another embodiment of the present invention, preferably, the abrasive grains are diamond abrasive grains or CBN abrasive grains. In this case, since the diamond abrasive grains or the CBN abrasive grains having the highest hardness among the abrasive grains are used, the life of the grinding wheel is prolonged and the work efficiency is increased.

Preferably, the average particle size is 5 to 50 μm.
m water-soluble particles or hollow balloons are further included in the resin binder. The grindstone structure in which fine abrasive grains are bonded with a resin binder tends to be dense and have very few pores. In such a case, the presence of the water-soluble particles or the hollow capsules causes a chip on the polished surface of the grindstone. A pocket is formed, and clogging is suitably eliminated.

[0011] Preferably, microcapsules containing 5 to 30% by volume of a lubricant and / or a surfactant are further contained in the resin binder. With this configuration, the presence of the microcapsules forms chip pockets on the polished surface of the grindstone to further eliminate clogging, and also supplies a lubricant and / or a surfactant from the microcapsules. Slip of the knife is improved, and the discharge of sharpening powder becomes easier,
Occurrence of scratches at the tip of the polished surface of the blade, that is, at the cutting edge, is suitably suppressed.

Preferably, a metal antibacterial agent having an average particle diameter of 5 μm or less is further contained in the resin binder in an amount of 1 to 5% by volume. In this way, the antibacterial property of the blade sharpening whetstone is enhanced, and it becomes sanitary especially when sharpening a kitchen knife used for cooking.

[0013]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a wheel 8 for sharpening a knife according to one embodiment of the present invention. The blade 8 for sharpening the edge of a knife used for cooking, such as a kitchen knife used for cooking, a chisel of a carpenter's tool, a plane, a sword, a knife, or the like, for sharpening the edge of the knife when reproducing the sharpness of the knife. And a substrate 14 on which the abrasive material layer 12 is fixed and supported on one surface. The blade 8 is a flat rectangular parallelepiped having an overall dimension of, for example, about 200 mm (length) × 70 mm (width) × 20 mm (thickness).
It is formed to a thickness of about mm.

The substrate 14 is made of a light alloy such as aluminum, a metal such as steel, or a resin, and is made of a material having high rigidity. Therefore, the substrate 14 can be called a base metal or a base plate. . The grindstone structure of the abrasive layer 12 is, as schematically shown in FIG.
Is a resin binder 18 such as a phenol resin or an epoxy resin.
And a whetstone structure joined by The resin binder 18 further includes a particulate or flaky carbon graphite 20, a water-soluble particle such as chloride or sugar, or a pore-forming agent 22 composed of an inorganic hollow balloon such as a glass balloon, a solid or fluid. A microcapsule 24 containing a lubricant and / or a surfactant;
A metal antibacterial agent 26 made of copper, titanium, nickel, or a complex thereof is uniformly dispersed.

Since the carbon graphite 20 is mixed as described above, the abrasive layer 12 has a relatively dark gray tone, has the same appearance color as that of a gray natural sharpening wheel, and has a sharpening edge. Since the appearance of the sharpening powder generated by the operation is the same as that of the conventional method, no error occurs in the determination of the specific sharpening. In addition, the blade 8 for sharpening the knife of the present embodiment is provided with a chamfer 28 having a side of about 2 to 3 mm for taking the corners of the four corners of the sharpening surface 10. However, in the structure of the grinding wheel 8, the carbon graphites 20 are separated from each other, and there is no conductivity of the grinding wheel 8.

The diamond abrasive grains 16 are # 6000
And a grain size in the range of # 16000 to # 16000, and is mixed at a ratio of 5 to 15% by volume with respect to the total volume of the blade 8. If the grain size of the diamond abrasive grains 16 is less than # 6000, scratches occur, making the blade unsuitable for finish sharpening. If it exceeds # 16000, the efficiency of the knife sharpening operation is reduced. The ratio of the diamond abrasive grains 16 is 5% by volume.
If it is less than 15%, the efficiency of the blade sharpening operation cannot be obtained, and if it is more than 15% by volume, the diamond abrasive grains 16 easily fall off and scratches are easily generated.

The carbon graphite 20 is
The resin binder 1 has an average particle size of 5 to 15 μm and a ratio of 5 to 20% by volume with respect to the total volume of the blade 8.
8 are uniformly dispersed. If the average particle size of the carbon graphite 20 is less than 5 μm, the solid lubricating action cannot be sufficiently obtained, and if it exceeds 15 μm, the solid lubricating action becomes unnecessarily large and the efficiency of the blade sharpening operation is reduced.
When the proportion of the carbon graphite 20 is less than 5% by volume, the solid lubricating action cannot be sufficiently obtained, so that the occurrence of scratches is observed. When the proportion exceeds 20% by volume, the solid lubricating action becomes unnecessary. It becomes large and the efficiency of the knife sharpening operation is reduced.

The pore-forming agent 22 composed of water-soluble particles or hollow balloons has an average particle size of 5 to 50 μm, and has a resin content of 5 to 30% by volume based on the total volume of the blade 8. It is uniformly dispersed in the binder 18. When the pore-forming agent 22 has an average particle diameter of less than 5 μm, its chip accommodating function, that is, the chip pocket function is reduced, and clogging is liable to occur. The strength of the thin portion is reduced, the wear of the grindstone becomes remarkable, and the thin portion is liable to fall off, and the finish sharpening quality is reduced. If the pore-forming agent 22 is less than 5% by volume, the chip accommodating function, that is, the chip pocket function is not sufficiently obtained, so that clogging is likely to occur. The strength of the thin portion between the pore-forming agents 22 decreases, and the wear of the grindstone becomes significant.

Further, the microcapsules 24 are 1 to 5
It has an average particle size of 0 μm and is uniformly dispersed in the resin binder 18 at a ratio of 5 to 30% by volume with respect to the total volume of the blade 8. When the average particle size of the microcapsules 24 is less than 1 μm, the microcapsules 24 easily fall off in units of capsules. When the average particle size is more than 50 μm, the microcapsules 24 are crushed at the time of grinding. When the mixing ratio of the microcapsules 24 is less than 5% by volume, no effect is observed,
If it exceeds, it becomes difficult to maintain the shape of the grindstone.

The metal-based antibacterial agent 26 has an average particle size of 5 μm or less, and is 1% with respect to the total volume of the blade 8.
It is uniformly dispersed in the resin binder 18 at a ratio of about 5% by volume. If the average particle size of the metal antibacterial agent 26 exceeds 5 μm, the sharpening ability will decrease. When the mixing ratio of the metal-based antibacterial agent 26 is less than 1% by volume, the antibacterial action is reduced. When the mixing ratio is more than 5% by volume, the sharpening ability is reduced and the abrasive particles are often dropped.

The grinding wheel 8 configured as described above for sharpening a knife
Is manufactured, for example, by the following steps. That is,
First, the diamond abrasive grains 16 and the resin binder 1 in a flowing state
8, carbon graphite 20, pore forming agent 22, microcapsules 24, and metal antibacterial agent 26 are mixed at a predetermined ratio. Next, the mixed fluid raw material is cast by being injected into a predetermined mold, and the resin binder 18 is removed from the mold after curing. And
For example, it is manufactured by performing main curing by a heat treatment of about 120 degrees.

The grinding wheel 8 configured as described above for sharpening a knife
According to the above, relatively fine diamond abrasive grains 1 having a particle size in the range of # 6000 to # 16000 are contained in the resin binder 18.
5 to 15% by volume, and carbon graphite 20 having an average particle size of 5 to 15 μm
Since it contains 0% by volume, the lubricating action of the carbon graphite 20 and the polishing action of the abrasive grains are combined to obtain a smooth polished surface, so that the finish of the cutting edge can be sharpened, and the blade can be suitably sharpened. . In addition, according to the blade 8 for sharpening a knife of the present embodiment, the average particle size is 5 to 15 μm.
Since the carbon graphite 20 of 5 to 20% by volume is contained, the color tone of the blade for sharpening the blade becomes darker and is similar to the appearance of a natural wheel for sharpening the blade and the color tone of the sharpening powder generated by the sharpening operation. The appearance of the sharpened powder is the same as when a natural sharpening stone is used, and there is no mistake in determining the sharpness.

FIG. 3 shows a conventional grinding wheel 3 having diamond abrasive grains 16 bonded by a resin binder 18.
0 shows a whetstone structure. According to such a conventional grindstone 30 for sharpening, it is possible to roughly grind a blade, but if it is used as a finish grind, only a flaw due to friction of abrasive grains is formed, and the sharpening of the blade tip, that is, the blade is sharpened. There was a disadvantage that the attachment could not be performed sufficiently.

In addition, according to the blade 8 for sharpening the knife of this embodiment, since the diamond abrasive grains 16 are used as the abrasive grains, the life of the grinding stone is increased and the working efficiency is increased.

Further, according to the grinding wheel 8 for sharpening a knife of this embodiment, the pore-forming agent 22 composed of water-soluble particles or inorganic hollow balloons having an average particle diameter of 5 to 50 μm is used as the resin binder 18.
It is further included in. Fine abrasive grains 16 are mixed with resin binder 18
As shown in FIG. 3, the conventional grindstone structure which is simply bonded by the method described above tends to be dense and has very few pores. However, according to the present embodiment, the pore-forming agent 22 comprising the water-soluble particles or the hollow capsules is used. Due to its presence, a number of chip pockets are formed on the sharpening surface 10 which is the polished surface of the blade 8 and the clogging is suitably eliminated.

According to the blade 8 for sharpening a knife of the present embodiment, the microcapsules 24 containing 5 to 30% by volume of a lubricant and / or a surfactant are mixed with the resin binder 1
8, the microcapsules 24
The tip pocket is formed on the sharpening surface 10 of the blade 8 for sharpening the blade by the presence of the blade, and the clogging is further eliminated, and the lubricant and / or the surfactant is supplied from the microcapsule 24 to prevent the blade from slipping. As a result, the sharpening powder is easily discharged and the generation of scratches at the tip of the polished surface of the blade, that is, at the cutting edge, is suitably suppressed.

Further, according to the blade 8 for sharpening a knife of the present embodiment, 1 to 5% by volume of the metal-based antibacterial agent 26 having an average particle size of 5 μm or less is further contained in the resin binder 18.
The antibacterial property of the blade 8 for sharpening the knife is improved, and it becomes sanitary particularly when sharpening a kitchen knife used for cooking.

While the embodiment of the present invention has been described with reference to the drawings, the present invention can be applied to other embodiments.

For example, the grinding wheel 8 for sharpening the knife in the above-described embodiment is a flat rectangular parallelepiped and is composed of the substrate 14 and the abrasive layer 12 fixed to one surface thereof. Other shapes may be used,
The whole may be composed of a grindstone structure as shown in FIG.

In addition, although diamond abrasive grains 16 are used in the grinding wheel 8 for cutting blades of the above-described embodiment, super abrasive grains such as CBN abrasive grains, alumina abrasive grains,
General abrasive grains such as silicon carbide abrasive grains may be used.

Although the pore forming agent 22, the microcapsules 24, and the metal-based antibacterial agent 26 are mixed in the blade 8 for sharpening the knife of the above-described embodiment, they need not be mixed and may be mixed. May be selectively mixed or the mixing ratio may be changed.

In addition, although the pore-forming agent 22 such as water-soluble particles or inorganic hollow balloons is mixed in the blade 8 for sharpening the knife of the above-described embodiment, foaming during casting of the wheel 8 for sharpening the blade is performed. May be provided.

The above description is merely an embodiment of the present invention, and the present invention can be variously modified without departing from the gist thereof.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a grindstone for sharpening a blade according to an embodiment of the present invention.

FIG. 2 is a sectional view schematically illustrating a grindstone structure of the grindstone for blade sharpening of FIG.

3 is a cross-sectional view schematically illustrating a grindstone structure of a conventional grindstone, and is a view corresponding to FIG. 2;

[Explanation of symbols]

 8: Whetstone for blade sharpening 16: Diamond abrasive grains (abrasive grains) 18: Resin binder 20: Carbon graphite 22: Pore forming agent 24: Microcapsule 26: Metal antibacterial agent

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B24D 3/34 B24D 3/34 Z (72) Inventor Kunihiro Suzuki 3-1-1 Noritake Shinmachi, Nishi-ku, Nagoya-shi, Aichi Prefecture No. 36 Noritake Co., Ltd. F-term (reference) 3C063 AA02 BB02 BB07 BC03 BD01 BD05 EE26 EE32 FF23

Claims (5)

[Claims] An abrasive having a particle size in the range of # 6000 to # 16000 is 5 to 15% by volume, and an average particle size is 5 to 15 μm.
m. 5 to 20% by volume of carbon graphite is uniformly dispersed in a resin binder. 2. The method according to claim 1, wherein the abrasive grains are diamond abrasive grains or C abrasive grains.
The grindstone for sharpening a knife according to claim 1, which is a BN abrasive. 3. The grinding wheel for sharpening a knife according to claim 1, further comprising 5 to 30% by volume of water-soluble particles or hollow balloons having an average particle size of 5 to 50 μm. 4. The grinding wheel for sharpening a knife according to claim 1, wherein the microcapsules containing a lubricant and / or a surfactant further contain 5 to 30% by volume. 5. The grindstone according to claim 1, further comprising 1 to 5% by volume of a metal antibacterial agent having an average particle size of 5 μm or less.