KR101808731B1

KR101808731B1 - Wire of lelctric discharge machining, apparatus and method for coating photocatalyst to the wire

Info

Publication number: KR101808731B1
Application number: KR1020160018338A
Authority: KR
Inventors: 차구익; 정우선
Original assignee: 차구익; 정우선
Priority date: 2016-02-17
Filing date: 2016-02-17
Publication date: 2017-12-13
Also published as: KR20170096735A

Abstract

The present invention relates to a discharge processing wire in which a photocatalyst is coated on a surface of an electric discharge machine for cutting a workpiece by electric discharge, and a photocatalyst coating apparatus and method for coating a photocatalyst on the surface of a wire.
The wire for electric discharge machining according to the present invention is characterized in that titanium dioxide powder 3 (TiO ₂ ), which is a photocatalyst material, is irregularly attached to the surface 1a.

Description

TECHNICAL FIELD [0001] The present invention relates to a wire for electric discharge machining, a photocatalyst coating apparatus,

The present invention relates to a discharge processing wire in which a photocatalyst is coated on a surface of an electric discharge machine for cutting a workpiece by electric discharge, and a photocatalyst coating apparatus and method for coating a photocatalyst on the surface of a wire.

Korean Patent No. 10-0543847 (registered on January 10, 2006) discloses "electrode wire for electric discharge machining and its manufacturing method ".

The electrode wire for electric discharge machining includes a metal core wire, a coating layer formed by surrounding the core wire, and a crystal grains formed on the coating layer and made of a copper zinc alloy. The crystal grains include 0.01 to 0.5 wt% of at least one element selected from the group consisting of aluminum, tin, magnesium, lanthanum, cerium, nickel, manganese, titanium and zirconium.

However, the electrode wire for electric discharge machining has a disadvantage that heavy metal contamination may occur due to the metal oxide in the form of vapor generated in the process of cutting the workpiece by electric discharge.

Korean Patent No. 10-0837350 (registered on June 4, 2008) "Electrode wire for wire discharge machining" Korean Patent No. 10-0300910 (registered on June 20, 2001) "Electrode for wire discharge machining" Korean Patent Application Publication No. 10-2015-0103234 (published September 9, 2015) "Electrode Wire for Wire Discharge Machining &

Accordingly, an object of the present invention is to provide a method of manufacturing a discharge lamp capable of improving the air quality of a workplace by removing titanium oxide powder, which is a photocatalyst material, on the surface, and removing toxic substances such as metal oxides, And to provide a working wire.

Another object of the present invention is to provide an apparatus and a method for coating titanium dioxide, which is a photocatalyst material, on the surface of a wire.

In order to achieve the above object, the wire for electric discharge machining according to the present invention is characterized in that titanium dioxide powder (TiO ₂ ), which is a photocatalyst material, is irregularly adhered on the surface.

And the titanium dioxide powder is adhered to the surface of the wire by an adhesive.

An example of an apparatus for coating a photocatalyst on a wire for electric discharge machining according to the present invention is characterized in that a coating apparatus and a drying apparatus are disposed between a wire feeding section and a winder, and a wire supplied to the wire feeding section sequentially passes through the coating apparatus and the drying apparatus, By winding, the tantalum dioxide powder is irregularly attached to the surface of the wire.

An example of a method of coating a photocatalyst on a wire for power generation according to the present invention is a method in which a coating apparatus and a drying apparatus are disposed between a wire supplying section and a winding apparatus, and a wire drawn out from the wire supplying section is passed through a coating apparatus and a drying apparatus in order, The tartrate powder is irregularly adhered to the surface of the substrate.

Here, an example of the coating apparatus is that titanium dioxide powder is dispersed in an adhesive filled in an agitator, a valve is attached to a discharge pipe of an agitator, and an adhesive containing titanium dioxide powder is controlled to be discharged through a discharge pipe by a valve, An adhesive containing titanium dioxide powder is supplied from the discharge pipe of the stirrer to the upper surface of the felt so that an adhesive containing titanium dioxide powder is applied to the surface of the wire passing through the upper surface of the felt.

In another example of the coating apparatus, a titanium dioxide powder is dispersed in an adhesive filled in an agitator, and a valve is attached to a discharge pipe of the stirrer, so that the adhesive containing titanium dioxide powder is controlled to be discharged through a discharge pipe by a valve, The spraying means is disposed at the tip of the wire, so that the adhesive containing the titanium dioxide powder injected by the spraying means in the course of passing the wire through the inside of the collecting box is applied to the surface of the wire .

Thus, the wire for electric discharge processing, the photocatalytic coating apparatus and method according to the present invention can irregularly adhere titanium dioxide powder, which is a photocatalyst material, on the surface, so that titanium dioxide powder can prevent harmful substances such as metal oxides By removing by chemical reaction, it is effective not only to improve the air quality of the workplace but also to purify the cutting fluid and the function of anion release.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view schematically showing that a workpiece is subjected to electric discharge machining by a wire for electric discharge machining according to the present invention, and an enlarged detail view showing a state in which titanium dioxide powder particles are attached to the surface of a wire.
2 is a schematic view showing an example of an apparatus for coating a photocatalyst on a wire for electric discharge machining according to the present invention
3 is a view schematically showing another example of an apparatus for coating a photocatalyst on a wire for electric discharge machining according to the present invention

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1, the wire 1 for electric discharge machining according to the present invention irregularly adheres titanium dioxide powder (TiO ₂ ) as a photocatalyst material on the surface 1a.

The titanium dioxide powder (3) is bonded to the surface (1a) of the wire by an adhesive (5).

In the wire for electric discharge machining according to the present invention as described above, a negative current is applied to the wire 1 as an electrode line, a positive current is applied to the work 7, and a discharge is generated at a portion where the wire 1 contacts the work 7 So that the workpiece 7 is processed into a predetermined shape. In this case, the present invention is a titanium dioxide powder (3) dispersed in a surface (1a) of the wire (1) is activated by ultraviolet rays generated by the discharge, hydroxy radicals (-OH) and super side oxy anions (-O ₂ ^- ), in which hydroxy radicals have strong oxidizing power and can divide molecular bonds of each substance. By removing harmful substances such as metal oxides by chemical reaction using the oxidizing power of the hydroxy radical, not only the air quality of the workplace is improved, but also the anion emitting function and the cleansing liquid are cleansed.

For reference, the titanium dioxide has an effect of disinfection and decomposition of organic matter, and this oxidative decomposition effect was commercialized in 1967 under the name of photocatalyst, proved by two Japanese scientists.

Titanium dioxide (TiO ₂ ), which is a raw material of photocatalyst, emits electrons (e +) and holes (h +) when it receives energy above the bandgap from the outside and combines them with oxygen (O 2) and water (H 2 O) to form superoxide anion -) and hydroxy radical (-OH). The generated ions oxidize and reduce the organic material adsorbed on the surface of the photocatalyst and oxidize the contaminated material.

A (Advanced) T (TiO2) P (Process) is a combination of the most innovative net-type photocatalyst technology and is a fusion technology of oxidation process. It is used for air disinfection and water disinfection.

Catalysts do not change themselves in any chemical reaction, but they act to change the reaction rate or improve the reaction.

Photocatalyst is a kind of catalyst, which means that catalytic action takes place by receiving light energy.

TiO2 (anatase), TiO2 (rutile), ZnO, CDS, ZRO2, SNO2, V2O2 can be used for the photocatalyst. WO3 and the like, and perovskite type composite metal oxide (SRTIO3). However, semiconductor materials that can be used in the photocatalytic reaction of the substance must first be optically active and free from photocatalytic reaction. It must also be biologically and chemically inert and should not only be able to utilize light in the visible or ultraviolet region, but also economically. Titanium is the ninth most element in the earth's crust, and white pigments and white paints commonly used in cosmetics are mainly made of titanium dioxide. Titanium dioxide which does not react by light if possible is used as the pigment, but titanium dioxide which has enhanced photoreactivity is used for a photocatalyst application product such as an air purifier. In addition, Titanium Dioxide is abundant in resources, so its price is cheap, its durability and abrasion resistance are excellent as a photocatalyst, and it is safe itself as a photocatalyst. It is one of the products of Nano Industry. In particular, considering the conditions and activity of the photocatalyst, it can be used semi-permanently because it does not change even if it receives light. It has better oxidizing power than chlorine (CL2) or ozone (O3) The decomposable titanium dioxide (TIO2) is widely used as a representative photocatalyst material. It can be easily coated on building wall, glass, mirror, tile with coating agent designed to form ultra-fine and acid-resistant transparent film by combining ultra-fine titanium dioxide with inorganic binder.

Just as photosynthetic action generates oxygen through the chlorophyll as a catalyst, the photocatalyst (PHOTOCATALYS) literally means that the catalytic action takes place by receiving light energy. That is, when energy of a certain region is applied to a semiconductor, electrons are regarded as a conductive band in a valence band. At this time, electrons (e) are formed on the conduction band (B) and holes (h +) are formed on the valence band. The electrons and holes formed in this manner cause various reactions such as separating harmful substances by strong oxidizing or reducing action.

In the electron (e) generated by the light contact with the titanium dioxide catalyst, the hole (h +) reacts with O 2 and H 2 O in the air, respectively, and superoxide anion (O 2, -), hydroxyl radical Of active oxygen. Especially. Oxalic acid radicals have high oxidation and reduction potential and are excellent for the purification of NOx, SOx, volatile organic compounds (VOCs) and various kinds of odors. They are also used for the production of BOD, chromaticity and degradation pollutants of animal husbandry wastewater, And has the ability to oxidize the target substance such as sterilizing 99% or more of various pathogenic bacteria and bacteria such as pathogenic Escherichia coli, Staphylococcus aureus, O-157 and the like.

In addition, when light is irradiated, one of two oxygen atoms constituting titanium dioxide reacts with H2O in the air to generate a hydrophilic (-OH) having a very good hydrophilicity, and the titanium dioxide surface is resistant to contamination And the attached contaminants have SELF-CLEANING which makes them easily cleaned by rainfall or water. Such a TIO2 photocatalyst is also economical because it reacts by solar energy or fluorescent light and exhibits a persistent function by a cycle of "fixation to an object, photolysis, and regeneration". In addition, the by-products after the reaction are substances harmless to the environment by water and CO2 and can be applied in various ways.

Such a TIO2 photocatalyst is also economical because it reacts by solar energy or fluorescent light and exhibits a persistent function by a cycle of "fixation to an object, photolysis, and regeneration". In addition, the by-products after the reaction are substances harmless to the environment by water and CO2 and can be applied in various ways. For example, if titanium dioxide is put into a filter of an air purifier containing an ultraviolet lamp, the dirt, bacteria and viruses attached to the filter are decomposed, and soot contained in the automobile exhaust gas (mostly carbon) On the coated glass, it is decomposed by ultraviolet rays contained in the light source. When ultraviolet rays come into contact with the surface of titanium dioxide coated paper, the dirt will be broken and the surface will be kept clean.

Another reaction of the photocatalyst is mineral water. Hydrophilicity is a phenomenon in which water adheres well to the surface of materials such as glass. In many materials, drops of water are formed when water is dropped. However, after the ultraviolet ray is applied to the material coated with the photocatalyst, the water does not become a water droplet and spreads almost completely. In materials coated with titanium dioxide, dirt is simply washed away when water is exposed and no water droplets are formed. Titanium dioxide, which is used as a photocatalyst, is physically and chemically safe. It is certified as a food additive in 1968 in the United States and 1983 in Japan. Foods (such as white chocolate) and cosmetics (functional cosmetics and lipstick) are widely used. In particular, in Japan, T was coated with photocatalyst and subjected to temporary skin irritation test and acute oral toxicity test at Japan Food Analysis Center (March 3, 1995) and Mitsubishi Chemical Safety Research Institute (February 24, 2000) Its stability has been certified through.

Active oxygen is usually present in the atmosphere and is usually produced in the body. This active oxygen often adversely affects the human body when it is sucked into the body in large quantities. The active oxygen generated by the photocatalytic action is a substance that proceeds on the surface of the coating and is not a substance floating in the air. Hydrogen peroxide is a commonly used example of active oxygen in daily life. Hydrogen peroxide generates active oxygen on the surface of the skin and acts to disinfect bacteria and germs.

2 and 3, in an apparatus for coating a photocatalyst on a wire for electric discharge machining according to the present invention, a coating apparatus 20 and a drying apparatus 30 are disposed between a wire supplying unit 10 and a winding apparatus 12, The wire 1 fed from the wire feeding section 10 is wound on the winding machine 12 by passing through the coating apparatus 20 and the drying apparatus 30 in order so that the surface of the wire 1 is coated with the titanium dioxide powder 3 See Fig. 1) are irregularly attached.

A method of coating a photocatalyst on a wire for electric discharge machining according to the present invention in an apparatus for coating a photocatalyst on a wire for electric discharge machining according to the present invention is characterized in that a coating apparatus 20 is provided between a wire feeder 10 and a winder 12 And the wire 1 drawn out from the wire feeding section 10 is passed through the coating apparatus 20 and the drying apparatus 30 in order so that the surface of the wire 1 is coated with the titanium dioxide powder (3) is irregularly attached.

2, the coating apparatus 20 has titanium dioxide powder dispersed in the adhesive filled in the stirrer 21a, and the valve 23a is mounted on the discharge pipe 22a of the stirrer 21a, The adhesive containing the titanium dioxide powder is controlled to be discharged through the discharge tube 22a by the discharge tube 23a and the adhesive containing the titanium dioxide powder is discharged from the discharge tube 22a of the stirrer 21a to the upper surface of the felt 24a So that an adhesive containing titanium dioxide powder is applied to the surface of the wire 1 passing through the upper surface of the felt 24a.

3, in the coating apparatus 20, the titanium dioxide powder is dispersed in the adhesive filled in the stirrer 21b, and the valve 23b is mounted on the discharge pipe 22b of the stirrer 21b And the valve 23b controls the discharge of the adhesive containing the titanium dioxide powder through the discharge tube 22b and the spray means 24b is mounted at the tip of the discharge tube 22b so that the spray means 24b is recovered The adhesive containing the titanium dioxide powder injected by the spray means 24b in the process of passing the wire 1 through the inside of the collection box 25b is disposed on the surface of the wire 1 .

The wire feeding part 10 is any one of a wire drawing machine or a winder capable of drawing a wire wound around a bobbin.

1: wire 3: titanium dioxide powder
20: Coating device

Claims

Titanium dioxide powder 3 (TiO ₂ ), which is a photocatalyst material, is irregularly attached to the surface 1a of the wire 1 for electrical discharge machining,
Wherein the titanium dioxide powder (3) is bonded to the surface (1a) of the wire by an adhesive (5).

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The coating apparatus 20 and the drying apparatus 30 are disposed between the wire feeding section 10 and the winding apparatus 12 so that the wire 1 supplied from the wire feeding section 10 is supplied to the coating apparatus 20 and the drying apparatus 30 And the wire is wound on a winding machine (12) so as to irregularly adhere the titanium dioxide powder (3) to the surface of the wire (1)
The coating apparatus 20 is configured such that the titanium dioxide powder is dispersed in the adhesive filled in the stirrer 21a and the valve 23a is attached to the discharge pipe 22a of the stirrer 21a and the titanium dioxide powder The adhesive containing titanium dioxide powder is supplied from the discharge pipe 22a of the stirrer 21a to the upper surface of the felt 24a so that the felt 24a is discharged from the discharge pipe 22a, Characterized in that an adhesive comprising titanium dioxide powder is applied to the surface of the wire (1) passing through the upper surface of the wire (1).

The coating apparatus 20 and the drying apparatus 30 are disposed between the wire supplying section 10 and the winding apparatus 12 and the wire 1 drawn out from the wire supplying section 10 is placed between the coating apparatus 20 and the drying apparatus 30 ) To the wire (1) so that the tantalum dioxide powder (3) is irregularly adhered to the surface of the wire (1)
The coating apparatus 20 is configured such that the titanium dioxide powder is dispersed in the adhesive filled in the stirrer 21a and the valve 23a is attached to the discharge pipe 22a of the stirrer 21a and the titanium dioxide powder The adhesive containing titanium dioxide powder is supplied from the discharge pipe 22a of the stirrer 21a to the upper surface of the felt 24a so that the felt 24a is discharged from the discharge pipe 22a, Characterized in that an adhesive comprising titanium dioxide powder is applied to the surface of the wire (1) passing through the upper surface of the wire (1).

The coating apparatus 20 and the drying apparatus 30 are disposed between the wire feeding section 10 and the winding apparatus 12 so that the wire 1 supplied from the wire feeding section 10 is supplied to the coating apparatus 20 and the drying apparatus 30 And the wire is wound on a winding machine (12) so as to irregularly adhere the titanium dioxide powder (3) to the surface of the wire (1)
The coating apparatus 20 is configured such that the titanium dioxide powder is dispersed in the adhesive filled in the stirrer 21b and the valve 23b is attached to the discharge pipe 22b of the stirrer 21b and the titanium dioxide powder The spraying means 24b is mounted at the tip of the discharge pipe 22b and the spray means 24b is disposed inside the collection box 25b, Characterized in that an adhesive containing titanium dioxide powder sprayed by the spray means (24b) is applied to the surface of the wire (1) in the process of passing the wire (1) through the inside of the collection box (25b) To a photocatalyst coating.

The coating apparatus 20 and the drying apparatus 30 are disposed between the wire supplying section 10 and the winding apparatus 12 and the wire 1 drawn out from the wire supplying section 10 is placed between the coating apparatus 20 and the drying apparatus 30 ) To the wire (1) so that the tantalum dioxide powder (3) is irregularly adhered to the surface of the wire (1)
The coating apparatus 20 is configured such that the titanium dioxide powder is dispersed in the adhesive filled in the stirrer 21b and the valve 23b is attached to the discharge pipe 22b of the stirrer 21b and the titanium dioxide powder The spraying means 24b is mounted at the tip of the discharge pipe 22b and the spray means 24b is disposed inside the collection box 25b, Characterized in that an adhesive containing titanium dioxide powder sprayed by the spray means (24b) is applied to the surface of the wire (1) in the process of passing the wire (1) through the inside of the collection box (25b) A method of coating a photocatalyst on a substrate.