JPS61265276A - Diamond sheet for cutting and polishing and its manufacturin method - Google Patents

Abstract

PURPOSE:To minimize a cutting width and cutting resistance of expensive metal and jewels being cut by a diamond sheet by electrically depositing diamond particles on at least one side of straight face metal foil. CONSTITUTION:A diamond sheet A is integrally formed of a straight face copper foil 6 made of a copper plate 5mu thickness and fine diamond particles 8 of less than 2mu as polishing particles having nickel eutectic plated layer 11, the diamond particles 8 being electrically deposited to both sides of the foil at high density by an electric depositing means. The fine diamond particles 8 in the sheet 8 permits the cutting width of expensive metal and jewels to be minimized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a diamond sheet for cutting and polishing, and a method for manufacturing the same.

[Conventional technology]

Although not shown in the drawings, a conventional diamond sheet of this type includes one in which diamond grains are attached to the surface of a polyester film base material using an adhesive resin.

[Problem that the invention seeks to solve]

Due to the above structure, the conventional diamond sheet of this type has the following problems.

(1) Since the diamond grains were attached to the surface of the polyester film base material by adhesive means, the abrasive grain density of the diamond grains was low, making it unsuitable for mass production, and the holding power of the diamond grains to the base material was also extremely weak. Therefore, there were problems such as low polishing efficiency, lack of durability, and weakness to heat.

(2) Furthermore, when trying to electrodeposit diamond powder with a particle size of 2 microns or less on metal foil, (a) the diamond powder coagulates due to moisture in the air and coagulates in the electrodeposition bath.

(b) In order to electrodeposit diamond grains at a high density, it is necessary to add diamond powder to the bath at a high concentration, and even if diamond powder is added to the bath at a high concentration, it is meaningless if it aggregates. (c) It was difficult to electrodeposit extremely small diamond grains on metal foil in a single layer at a high density, and it was not possible to put it into practical use.

[Means for solving problems]

This invention solves the above-mentioned problems of the prior art, and by attaching diamond grains to a metal foil base material using electrodeposition means, it is possible to increase the density of abrasive grains, facilitate mass production, and improve the quality of diamond grains. It is an object of the present invention to provide a diamond sheet for cutting and polishing that has enhanced holding power to a base material, increases polishing efficiency and durability, and is resistant to heat.

The feature of this diamond sheet is that diamond grains of 2 microns or less are electrodeposited on the surface of a facing metal foil with a thickness of 10 microns or less, and the feature of the manufacturing method of the diamond sheet is that A nickel plate connected to an anode is housed on at least one side of the electrodeposition bath placed in the electrodeposition tank, and a facing metal foil connected to the cathode is immersed in the bath corresponding to the nickel plate. In this method, diamond particles are mixed into the bath, and the diamond particles are electrodeposited on the facing metal foil while stirring the diamond particles in the bath using a stirring device such as rotation of a propeller.

[Effect]

With the above structure, the diamond sheet has diamond grains electrodeposited on the surface of the facing metal foil, so when this sheet is used for cutting, the material of the minute diamond grains will cut the diamond sheet.
In addition to being able to minimize the cutting allowance for expensive metals and jewelry, it also minimizes cutting resistance, making this type of work faster, and has abrasive grain retention and is resistant to heat.
Can increase durability. Furthermore, in the production of diamond sheets, the diamond grains are electrodeposited onto the facing metal foil base material while being agitated by the rotation of a propeller in the bath, ensuring the adhesion of the diamond grains to the base material and reducing the abrasive grain density. Can be easily increased.

〔Example〕

Hereinafter, the first embodiment of the invention will be explained based on the accompanying drawings.

First, the structure of the diamond sheet will be explained. As shown in Fig. 3, this diamond sheet A
By the manufacturing method described later, fine diamond grains 8 of 2.0 microns or less as abrasive grains are electrodeposited on both sides (or one side) of a faced copper foil 6 made from a copper plate with a thickness of about 5 microns. It is formed into a lump by densely electrodepositing.

With the above configuration, the diamond sheet A is made of diamond grains 8 that are made of diamond grains that are minute abrasive grains of 2.0 microns or less, with individual differences of 0.5 microns or less, so that the diamond sheet A can be cut to a minimum. It can demonstrate its power when cutting expensive metals and jewelry that require high precision. Further, since the above-mentioned method allows the cutting to be performed within a minimum narrow area, it is possible to speed up the cutting operation. Further, the sheet A has a copper foil 6
Diamond grains 8 are electrodeposited on the abrasive grains, and the abrasive grains have strong holding power and are resistant to heat, so durability can be increased.

The diamond sheet A described above is manufactured as follows. In order to facilitate explanation and understanding of this manufacturing method, a single-sided diamond sheet A will be described below. That is, as shown in FIG. 1, an electrodeposition bath 2 (copper, tin, or other composite plating baths other than Keckel) is put into the electrodeposition bath 1, and one side of the electrodeposition bath 2 is heated. The nickel plate 3 connected to the anode 4 is housed and arranged vertically.

Further, on the other side of the electrodeposition bath 2 corresponding to the nickel plate 3, a face-shaped copper foil 6 connected to the cathode 7 is vertically immersed with the support of a cathode jig 5.

According to this embodiment, 110 to 150 diamond particles 8 of 2.0 microns or less are added to the electrodeposition bath 2 per bath IE.
Contains Kyara Soto. In order to prevent the mixed diamond particles 8 from agglomerating, they are separated by ultrasonication, and a dispersant such as an anionic surfactant such as sodium lauryl sulfate is added to the electrodeposition bath 2.
! Add 5cc per serving.

Furthermore, in order to uniformly distribute the diamond particles 8 mixed into the electrodeposition bath 2, a rotating shaft 9 is provided in the electrodeposition bath 2.
A propeller lO integrated with the metal foil is inserted and the propeller is rotated toward the metal foil to agitate the diamond particles 8 so as to hit the metal foil to equalize the mixed distribution. In this case, diamond grains 8 can be electrodeposited on one side of the copper foil 6 by flowing this current for about 20 minutes with the current density in the electrodeposition bath 2 being 1.5 A/dm.

As described above, diamond grains 8 are electrodeposited on one side of the copper foil 6 immersed in the electrodeposition bath 2, taken out from the electrodeposition bath 1 and washed with water, and then washed twice and dried. By doing so, a large number of diamond grains 8 having a plating bath 11 (see Fig. 3, however, this Fig. 3 is a double-sided type) in which a predetermined thickness of nickel is eutectoided on one side of the copper foil 6 are formed at a high density. The production of a well electrodeposited monolithic diamond sheet A is completed.

In the above embodiment, diamond grains 8 are formed on one side of the copper foil 6.
However, when diamond grains 8 are to be electrodeposited on both sides of this copper foil 6, as shown in FIG. In the center zone of the electrodeposition bath 2, a copper foil 6 connected to the cathode 7 is immersed in the same manner as described above, and the same electrodeposition method as described above is performed. Accordingly, the above w1 foil 6
A large number of diamond grains 8 having a plating layer 11 with a predetermined thickness of nickel eutectoided on both sides can be electrodeposited with high density and well. (See FIG. 3) Furthermore, in the above embodiment, diamond grains 8 were used as the abrasive grains electrodeposited on the copper foil 6, but the present invention is not limited to the above embodiment. Even if it is used as an abrasive grain, it is possible to produce a cutting and polishing sheet similar to that of the above embodiment.

〔Effect of the invention〕

In this invention, diamond particles are electrodeposited on at least one side of a facing metal foil to form a diamond sheet that can be used for cutting and polishing. A nickel plate connected to the anode is housed on at least one side of the bath, and a faced metal foil connected to the cathode is immersed in the bath corresponding to the nickel plate, and then a diamond of 2 microns or less is placed in the bath. The method is characterized in that the diamond particles are mixed into the bath, and the diamond particles are electrodeposited while being agitated by the rotation of a propeller in the bath while striking the diamond particles against the facing metal foil.

Therefore, when this diamond sheet is used for cutting, etc., the fine diamond grain material minimizes cutting marks on expensive metals, jewelry, etc., and reduces cutting waste during cutting, which not only brings great economic benefits. Since the width of the sheet is narrow, the cutting resistance is minimal, which makes this type of work faster and the cutting efficiency can be greatly increased.In addition, this type of abrasive sheet has abrasive grain retention and is resistant to heat. In manufacturing this sheet, the diamond grains are easily and reliably electrodeposited onto the facing metal foil base material while being stirred by the rotation of a propeller in the bath. This has the effect of strengthening the adhesion of diamond grains to abrasive grains, and easily increasing abrasive grain density to significantly improve quality.

[Brief explanation of drawings]

Embodiment FIG. 1 is an explanatory diagram showing a method for manufacturing a single-sided diamond sheet of the present invention, FIG. 2 is an explanatory diagram showing a method for manufacturing a double-sided diamond sheet, and FIG. 3 is a double-sided diamond sheet manufactured according to FIG. 2. FIG.

Claims (2)

[Claims] (1) A diamond sheet for cutting and polishing, characterized in that diamond grains of 2 microns or less are electrodeposited on the surface of a facing metal foil of 10 microns or less. (2) A nickel plate connected to an anode is housed on at least one side of the electrodeposition bath placed in the electrodeposition bath, and a faced metal foil connected to the cathode is placed in the bath corresponding to the nickel plate. After immersion, diamond grains are mixed into the bath, and the diamond grains are electrodeposited on the faced metal foil while being stirred by a stirring device in the bath. Method of manufacturing diamond sheets.