JP2532066B2 - Method for preventing rot of water-containing cutting oil and grinding oil, generation of bad odor, and processing member thereof - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for preventing spoilage of cutting oil or grinding oil used in cutting or grinding operations and for removing a bad smell.

(Prior Art) Conventionally, cutting oil and grinding oil have been widely used for cutting and grinding in various fields of machining, but recently, cutting and grinding conditions have been speeded up, and tool technology has advanced. However, due to resource conservation and improvement of oil itself, water-containing ones are often used.

And, this water-containing cutting oil or grinding oil contains various organic substances in its components, and is used by being diluted with water at the time of the above-mentioned machining, and abrasive powder, a binder, etc. are added to the contents along with the machining. Be entered.

(Problems to be Solved by the Invention) However, after the water-containing cutting oil or grinding oil is diluted with water, the temperature rise associated with each processing, bacteria decomposed by additives in the oil, etc. Inviting mold and other breeding,
It gradually decomposes, and it starts to emit a foul odor. Then, as the rot further progresses, the oil itself is contaminated or slime is formed due to the influence of bacteria and the circulation of the oil is deteriorated, which not only leads to the deterioration of the working environment due to the generation of a bad odor, but also becomes a target for machining. It exposes problems such as shortening the tool life.

Therefore, the present invention, in order to eliminate the above-mentioned conventional drawbacks, by the water-soluble glass containing monovalent Ag wrapped with a water-permeable fiber cloth made of a woven or non-woven fabric of synthetic fibers, the cutting oil, the decay of the grinding oil The object of the present invention is to provide a novel treatment method for preventing the generation of a bad odor.

(Means for Solving Problems) The means for achieving the above object will be described with reference to the accompanying drawings. The composition is a lump, a granule or a powder of water-soluble glass containing monovalent Ag in its composition. Any one of the above, or a solid 10 made of a mixture, wrapped with a water-permeable fiber cloth made of a woven or non-woven fabric of synthetic fibers, suspended and immersed in cutting oil or grinding oil 30 diluted with water, and the glass solid 10 is dissolved in the fiber cloth 1 in the water through a gelled state to dissolve out Ag ⁺ ions, and the suspending substances or suspended matters contained in the oil 30 are the texture of the water-permeable fiber cloth 1. A water-containing material characterized in that Ag ⁺ ions are retained in the gel-like material while further suppressing the invasion into the gel-like material so that it can be gradually eluted into the remaining water outside the fiber cloth 1 from the cloth. Rot of cutting oil, grinding oil, This is a method for preventing the generation of offensive odors.

The above-mentioned water-soluble glass solid is 1 of SiO ₂ , B ₂ O ₃ .P ₂ O ₅
Or two or more kinds of network-forming oxides and Na ₂ O, K ₂ O, Ca
The solid composition is composed of a glass composition containing one or more network-modifying oxides of O, MgO, BaO and ZnO and one or two intermediate oxides of Al ₂ O ₃ and TiO ₂ . Monovalent Ag in 100 parts by weight, for example, Ag ₂ O containing 0.1 to 2.5 parts by weight, the cutting oil, the addition amount to the water in the grinding oil is adjusted to 300 to 1000 g / m ³ To be done.

(Operation) A water-soluble glass solid substance 10 containing monovalent Ag in the composition is wrapped in a water-containing cutting oil or a grinding oil with a water-permeable fiber cloth 1 made of a woven or non-woven fabric of synthetic fibers and dipped in suspension. As a result, the glass solid material 10 is dissolved in the gel cloth in the soluble fiber cloth 1 to suppress the sudden outflow action, and is gradually dissolved to retain Ag ⁺ ions in the gel material. After that, the water-containing cutting is performed by gradually eluting Ag ⁺ ions into the residual water outside the fiber cloth 1 from the grain of the fiber cloth 1 by sterilizing and removing the microorganisms and molds of the Ag ⁺ ions. Prevents putrefaction of oil or grinding oil and generation of offensive odor. And this action will be to control the dissolution rate in water of the solid 10 by the gelation phenomenon with the solid 10,
From now on, it will be eluted in water while maintaining a constant Ag ⁺ ion over time.

In this case, the effect of suspended substances and suspended solids consideration the weft of the fabric 1 so as not to penetrate into the interior than the weft of the water permeability fabric 1 efficiently Ag ⁺ ions contained in the oil 30 Try to do it.

As the water-permeable fiber cloth 1, a woven cloth is used when cutting oil is used, and a woven cloth is used when grinding oil is used.

(Examples) Examples according to the present invention will be described below.

First, the method of the present invention is applied to an oil circulation system A including a closed loop pipe line 5 configured for cutting or grinding a machine tool or the like shown in FIG. 1, for example. Reference numeral 3 in the drawing is an oil tank for storing crude oil for cutting oil and grinding oil, and the cutting oil or grinding oil is initially supplied to a reservoir (storage tank, hereinafter referred to as a reservoir) 4 from a conduit 3a. This cutting oil, grinding oil,
Various chemicals and organic substances are added to mineral oil such as spindle oil and machine oil.
It is diluted 10 to 100 times, and is used by circulating it thereafter.

That is, the cutting oil or the grinding oil supplied from the reservoir 4 to the cutting or grinding machine 2 for cutting or grinding a tool or the like via the conduit 5 again flows into the reservoir 4 and is temporarily stored therein. To be done. This reservoir 4
As shown in the figure, a water-soluble glass solid material 10 containing monovalent Ag is wrapped in a water-permeable fiber cloth 1 and suspended and dipped therein.

As the water-permeable fiber cloth 1, for example, a non-woven fabric made of synthetic fiber such as nylon or tetron is used for cutting oil having a relatively small amount of abrasive powder added, and is used for a grinding oil having a large amount of abrasive powder added. Woven cloth of synthetic fibers such as polyethylene and polyester may be used.

Then, in order to efficiently prevent the putrefaction of oil and the generation of malodor due to Ag ⁺ ions in the glass solid material 10, the water-permeable fiber cloth 1 encapsulating the water-soluble glass solid material 10 is used in the reservoir 4 or the like. For example, in the reservoir 4, a plurality or singular pieces are suspended and immersed at an intermediate position as shown in the figure so as to come into contact with oil on all azimuth planes.

The water-soluble glass solid material 10 wrapped with the fiber cloth 1 is provided separately from the reservoir 4, for example, from the reservoir 4 to the pump P.
The cutting oil and the grinding oil which are returned to the oil tank 3 in the same manner are also installed in the processing unit 6 located in the distribution process of the grinding oil in the same manner as described above, and the cutting oil and the grinding oil that flow with the water-permeable fiber cloth 1 encapsulating the solid matter 10 You may make it contact with oil.

In the above description, the water-permeable fiber cloth 1 containing the water-soluble glass solid substance 10 is returned to the continuous supply of the above-mentioned water-containing cutting oil or grinding oil circulating in the reservoir 4 or the like, and oil and water However, the method of the present invention is not limited to this state, for example, cutting and grinding work. Is temporarily stopped and the hydrous cutting oil or grinding oil is allowed to stand in the reservoir 4 to separate layers of oil and water, the water-soluble glass suspended and immersed in the water layer of this reservoir The water-permeable fiber cloth 1 containing the solid material 10 has an effect of preventing the water layer in the reservoir 4 from decaying and generating a bad odor.

Next, the water-soluble glass solid material 10 used in the above method is Si
One or more of O ₂ , B ₂ O ₃ .P ₂ O ₅ and Na ₂ O, K ₂ O, CaO, M
One or more of gO, BaO, ZnO and one of Al ₂ O ₃ and TiO ₂ .
A solid substance of water-soluble glass having a composition containing two or more kinds, and 0.1 to 2.5 parts by weight of Ag ₂ O, for example, as monovalent Ag is contained in 100 parts by weight of this solid substance to form a lump or a granule. Stuff,
It is made into powder.

In addition, in order to facilitate suspension inside the reservoir 4 and the processing unit 6, a protruding piece is attached to the end portion as shown in FIG.
A single or a plurality of water-permeable fiber cloths 1 enclosing the above-mentioned solid material 10 as shown in FIG. 1 (a) may be housed in a box 7 having a large number of water passages provided with 7a.

Further, the glass solid matter 10, the addition amount to the water in the oil is preferably 300 ~ 1000 g / m ³ , and within this range Ag ⁺ ions of the solid matter 10 are gradually eluted into the oil. Ultimately, the Ag ⁺ ion is adjusted to be 3 to 5 ppm to prevent the target oil from spoiling and generating an offensive odor.

Next, Table 1 shows the test results for examining the effect of preventing decay of water in the cutting oil in the reservoir in the treatment method of the present invention described above.

That is, for every 1000 water-containing cutting oil (emulsion type) in the reservoir that is at the limit of use, a monovalent Ag-containing water-soluble glass is used.
The glass solid was adjusted to 600 g, wrapped with a nylon non-woven fabric having a standard sieve of 10 mesh, and suspended and dipped in a reservoir.

The monovalent Ag-containing water-soluble glass is SiO ₂ 40.
Monovalent A in 0 mol%, B ₂ O ₃ 50.0 mol%, Na ₂ O 10.0 mol%
Convert 0.5 g to Ag ₂ O and add 0.5% by weight, mix evenly, and use a glass melting furnace at a temperature in the range of 1100 to 1300 ° C for 60
After melting for a minute, it was prepared by quenching.

From the test results shown in Table 1, the treatment method of the present invention reduces the total number of probiotic bacteria, molds, sulfate-reducing bacteria, etc. that cause water spoilage in the cutting oil over time, while increasing the PH value to the alkaline side. It can be seen that this promotes the action of Ag ⁺ ions and reduces the generation of odor.

Furthermore, the removal effect of the generation of malodor against the water in the grinding oil (emulsion type) in the reservoir was examined by the above method, and the results are shown in Table 2.

In other words, a 600% water-containing grinding oil (emulsified type) in the reservoir at the limit of its usage
It was prepared by adjusting to 400 g of g-containing water-soluble glass and wrapping the glass solid material in a double layer with a polyethylene woven cloth having a standard sieve of 12 mesh and suspending and dipping it in a reservoir.

As is clear from the results shown in Table 2, it is recognized that the malodor of the above-mentioned grinding oil is removed over time by the treatment method of the present invention.

(Effect of the invention) As described above, the treatment method of the present invention, the total soluble glass solids containing monovalent Ag wrapped with a water-permeable fiber cloth made of synthetic fiber woven cloth or nonwoven cloth resistant to oil and water. It is a gradual and continuous elution of Ag ⁺ ions to prevent the oil from spoiling and the generation of malodor, so the action of Ag ⁺ ions suppresses the decay of oil and the generation of microorganisms that cause malodor. However, the cutting oil and the grinding oil are drastically extended, and the cutting oil and the grinding oil are renewed for a long period of time, whereby the cost associated with the extension can be reduced and the work cycle can be improved.

Also, the above-mentioned glass solid matter is not of a type that can be injected into a fixed amount in the process of processing simply by suspending it in a reservoir or a unit, so that it is easy to handle and the weight loss due to use can be visually confirmed. Maintenance of solid matter is easy, and since it elutes on the entire surface of solid matter, it can be applied to a static type with no forced flow in the reservoir, and it can also damage the cutting and grinding machines. You can combine profits that are not available.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing a closed loop circulation system of cutting oil and grinding oil according to one embodiment of the treatment method of the present invention, and FIGS. 2 (a) and (b) are water-permeable solid materials of the present invention. It is explanatory drawing which shows the aspect wrapped with fiber cloth. (Description of symbols) 1 ... water-permeable fiber cloth, 2 ... cutting and grinding machine, 3 ... crude oil tank, 4 ... reservoir, 5 ... pipeline, 6 ... processing unit, 7 ... box, 8 ... Water tank, 10 ... Water-soluble glass solids containing monovalent silver, 30 ... Cutting oil, grinding oil.

Claims (8)

(57) [Claims] 1. A water-permeable material composed of a woven or non-woven fabric of synthetic fibers, which is made of a woven fabric or a non-woven fabric of synthetic fibers, which is a solid substance made of a lump, a granular substance, or a powdered substance of a water-soluble glass containing monovalent Ag in its composition While wrapping with fiber cloth and suspending and soaking in cutting oil or grinding oil diluted with water, the glass solid matter is dissolved in the water through the gelling state in the fiber cloth while eluting Ag ⁺ ions. , Ag ⁺ ions are retained in the gel-like material while suppressing the invasion of suspending substances or suspended matters contained in the oil from the cloth of the water-permeable fiber cloth, and then from the cloth. A method for preventing deterioration of water-containing cutting oil, grinding oil, and bad odor, which is characterized in that it is gradually eluted into the remaining water outside the fiber cloth. 2. A water-soluble glass solid material wrapped in a water-permeable fiber cloth, wherein the water-soluble glass solid material is supplied by a closed loop line for supplying or discharging hydrous cutting oil or grinding oil to or from a grinding machine and discharging from the machine. The processing method according to claim 1, wherein the oil is suspended and immersed in a reservoir of the oil on a closed loop line. 3. A water-containing cutting oil or grinding oil is allowed to stand in a reservoir to separate layers of oil and water, and a water-permeable fiber cloth containing a water-soluble glass solid substance is suspended and dipped in the water tank. The processing method according to claim 2. 4. A water-permeable fiber cloth containing a water-soluble glass solid material, in which a hydrous cutting oil or a grinding oil is continuously supplied and returned in a reservoir to dynamically mix an oil content and a water content. Claim 2 in which the oil is suspended and immersed in this oil.
The processing method described in the item. 5. A water-soluble glass solid material wrapped with a water-permeable fiber cloth is placed in a processing unit separate from a reservoir,
The processing unit according to claim 1, wherein the processing unit is provided at an arbitrary position on the closed loop pipe line so that cutting oil or grinding oil passes through the processing unit in contact with the glass solid matter. Processing method. 6. A water-soluble glass comprising one or more of SiO ₂ , B ₂ O ₃ .P ₂ O ₅ and one of Na ₂ O, K ₂ O, CaO, MgO, BaO, ZnO. Alternatively, it is composed of a glass composition containing two or more kinds and one or two kinds of Al ₂ O ₃ and TiO ₂ , and A in 100 parts by weight of this composition.
Claim 1 in which 0.1 to 2.5 parts by weight of g ₂ O is contained, and the addition amount of the above glass solid to water is 300 to 1000 g / m ³ .
The processing method according to any one of items 5 to 5. 7. The processing method according to claim 1, wherein the water-permeable fiber cloth is a non-woven fabric of nylon or tetron, and the oil to be processed is cutting oil. 8. The processing method according to claim 1, wherein the water-permeable fiber cloth is made of polyethylene or polyester woven cloth, and the oil to be processed is grinding oil.