JP3497916B2 - Coolant purification device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coolant purifying apparatus which removes impurities mixed in a coolant used in a machine tool and always keeps the coolant in a clean state.

[0002]

2. Description of the Related Art Generally, coolants used in machine tools are mixed with impurities such as cutting chips, abrasive grains and oil.
When reused, this coolant must be purified once. Typical examples of means for purifying the coolant include a magnet separator method, a filtration method, and a precipitation method.

(1) Magnet separator method Chips mainly composed of a magnetic material mixed in a coolant,
Impurities such as abrasive grains are adsorbed to the magnet roller to separate from the coolant, and the impurities adsorbed to the magnet roller are removed by a scraper.
For example, it is disclosed in JP-A-58-174211.

(2) Filtration method Impurities mixed in the coolant are filtered by using a filter material (paper filter, cloth filter, metal filter, or porous member such as ceramics). For example, JP-A-3-213269. It is disclosed in the publication.

(3) Precipitation method A comparatively large-sized impurity is precipitated and separated by utilizing the difference in specific gravity from the coolant. For example, Japanese Patent Laid-Open No. 58-84092.
In the gazette, a labyrinth is formed through a partition plate in the tank that collects the coolant used in the machine tool, and impurities are removed when the coolant flows in each partition plate while being alternately changed in the vertical direction. Techniques for precipitation are disclosed. Incidentally, this precipitation method is generally used as a pre-process for reducing the load on each of the above-mentioned purifying means, and for example, in the above-mentioned JP-A-3-213269, it was used in a machine tool. First, the coolant is guided to the first tank, where large-sized impurities mixed in the coolant are precipitated, and subsequently, the coolant overflowed from the first tank is guided to the filtration section where the paper filter is laid, and the filtration section is installed. The coolant is filtered to remove small impurities.

(4) Floating method Fine particles or impurities such as oil content mixed in the coolant are suspended and removed by a schema or the like. For example, in JP-A-59-39309, the coolant is recovered. An ultrasonic oscillating plate is installed on the side wall of the tank, and the ultrasonic waves oscillating from the ultrasonic oscillating plate excite the impurities mainly composed of oil that are turbid in the coolant to cause them to agglomerate and float. A technique for removing the generated impurities with a schema is disclosed. In addition, JP-A-4-12
In Japanese Patent Publication No. 9643, the lower side of a rotating plate having a plurality of grooves spirally or concentrically formed on the surface is vertically dipped in a coolant stored in a coolant tank, and slowly rotated to form a liquid surface of the coolant. A technique is disclosed in which impurities mainly composed of floating oil are attached to the surface of the rotary plate to separate from the coolant, and then the impurities attached to the surface of the rotary plate are wiped with a scraper to be accumulated in a predetermined manner. .

Incidentally, separated from the magnet roller,
Alternatively, the impurities accumulated in the coolant tank may be the impurities disclosed in the above-mentioned JP-A-58-174211, or JP-A-3-2.
As disclosed in Japanese Patent No. 13269, etc., it is often discharged by a chip conveyor arranged at the bottom of the tank.

[0008]

However, even if any of the conventional purification methods is adopted or combined, it is not possible to completely remove various impurities mixed in the coolant. . For example, if a magnetic separator is used, it is possible to remove about 80 to 90% of impurities such as chips and abrasives mainly composed of a magnetic material mixed in the coolant, but mainly composed of a non-magnetic material. It is impossible to completely remove the impurities or fine particles of impurities. Also, when a magnet separator and a filter medium such as a paper filter are used together, it is possible to remove impurities that could not be completely removed by the magnet separator with the filter medium to some extent, but if a coarse filter medium is used, fine particles can be obtained. However, if a fine filter material is used, clogging is likely to occur, so that the frequency of replacement of the filter material will be high and the workability will be poor.

Further, in the precipitation method, the coolant is separated by utilizing the difference in specific gravity between the impurities mixed in the coolant. Therefore, it is necessary to allow the coolant to stay for a long time in order to completely separate the coolant. Therefore, a large-capacity tank and a large amount of coolant are required, which increases equipment costs.

As a result, the impurities spilled by the above-mentioned respective purification means are easily accumulated in the coolant tank for collecting the coolant used in the machine tool, and the accumulated impurities serve as a catalyst for bacterial growth to accelerate the spoilage of the coolant. The generation of offensive odor is accelerated, the amount of waste liquid is increased, and the running cost is increased.

Further, if the coolant in which the impurities are not completely removed is sucked by the coolant pump, the impurities mixed in the coolant may cause damage such as damage to the inside of the coolant pump, resulting in the deterioration of the strength of the coolant pump. Durability is reduced. Further, if the coolant in which the impurities are not completely removed is supplied to the cutting point or the grinding point of the machine tool, not only the cutting conditions are deteriorated but also the life of the tool or the grindstone used is shortened.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a coolant purifying apparatus capable of completely removing impurities mixed in the coolant and keeping the coolant in a clean state at all times. To do.

[0013]

In order to achieve the above object, a coolant purifying apparatus according to the invention of claim 1 is
A first purifying means for separating and removing impurities contained in the coolant used in the machine tool by a magnetic separator having a magnet roller, and a second purifying means arranged downstream of the first purifying means, The second purifying means diffuses the coolant and mixes it with the coolant.
Diffusion plays in which a stepped portion to precipitate the impurities which are
And a magnet plate for adsorbing the impurities, and further, the second cleaning means is provided with a tray for accommodating the diffusion plate and the magnet plate, and a filter medium is laid on the tray. It is characterized by

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

According to a second aspect of the present invention, in the coolant purifying apparatus according to the first aspect, impurities that remain after the lower side is immersed in the coolant surface are provided downstream of the second purifying means.
The magnet rotating plate to be attracted and the above coolant surface
A scraper for wiping the surface of the magnet rotating plate to be presented
And a partition plate is interposed between the second purification unit and the third purification unit, and the coolant that overflows the partition plate is guided to the third purification unit. An opening is formed, and one side surface of the magnet rotating plate is provided opposite to the opening.

According to a third aspect of the present invention, in the coolant purifying apparatus according to the first or second aspect, the diffusion is performed.
The plate is formed in a box shape, and a step portion for accumulating the precipitated impurities is provided on the bottom surface of the plate .

[0022]

According to the coolant purifying apparatus of the present invention, when the coolant used in the machine tool flows into the first purifying means, the magnet roller provided in the first purifying means attracts the impurities mixed in the coolant by magnetic force. Then, it is separated and removed from the coolant. Then, when the coolant from which the impurities have been removed by the first purifying means in a predetermined manner flows into the second purifying means , the impurities mixed in the coolant are precipitated and removed when flowing down the diffusion plate having the stepped portion of the second purifying means. In addition, the powder particles mainly composed of the magnetic material mixed in the coolant are adsorbed when flowing over the magnet plate. At the same time, powder particles mainly composed of non-magnetic material and impurities such as oil are also captured through the impurities such as powder particles adsorbed on the magnet plate. Further, by housing the diffusion plate and the magnet plate in the second purifying means in a tray on which the filter medium is laid, fine impurities mixed in the coolant that has flowed down from the diffuser plate and the magnet plate pass through the filter medium. When filtered.

[0023]

[0024]

[0025]

[0026]

[0027]

[0028]

Further, in the coolant purifying apparatus according to the second aspect, the magnet rotating plate that is rotated further downstream of the second purifying means with its lower side immersed in the coolant surface.
Of the magnet rotating plate exposed from the coolant surface
By disposing the third purifying means having a scraper for wiping the surface, fine impurities mainly composed of a magnetic substance floating in the coolant are adsorbed by the rotation of the magnet rotating plate, and at the same time, floating on the coolant surface. Impurities such as oil are deposited. Then, a partition plate is interposed between the second purification means and the third purification means, and an opening portion for guiding the overflowed coolant to the third purification means is formed in the partition plate,
By arranging one side of the magnet rotating plate opposite to this opening, the magnet rotating plate captures impurities having a relatively low specific gravity floating in the coolant flowing from the opening.
Then, these impurities attached to the magnet rotating plate
Is the degree to which the magnet rotating plate is exposed from the coolant surface.
Then, it is wiped off with a scraper and removed.

The coolant purifying apparatus according to claim 3 is
Furthermore, by forming the diffusion plate in the shape of a box and providing a step on the bottom surface, when the coolant flows down the diffusion plate , the coolant is diffused along the step, and at the same time, the relative specific gravity mixed in the coolant is relatively high. Of the heavy impurities are deposited and the precipitated impurities are deposited on the step.

[0031]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 13 show a first embodiment of the present invention. As shown in FIGS. 2 and 3, the coolant purifying apparatus A in this embodiment is arranged on the back surface R of a machine tool B that performs cutting, grinding or the like. This coolant purification device A
The coolant used in the machine tool B is purified, recovered and recirculated, and as shown in FIG. 4, a first purification unit 1 and a second purification unit 2 that purify the coolant used in the machine tool B. , A third purifying unit, a coolant tank 4 for collecting the coolant, and the like, and the coolant tank 4 is provided with a partition plate 5 between the storage tank 4 on the upstream side.
a and a cleaning tank 4b on the downstream side.

A coolant pump 6 is exposed to the cleaning tank 4b through a strainer 7.
The coolant that stays at is sucked by the coolant pump 6 and is supplied to a cutting point (or a grinding point) between the tool (not shown) of the machine tool B and the work W through the supply pipe 8.

As shown in FIG. 1, the first purifying means 1
Is mainly composed of a known so-called magnet separator, and a main body 10 thereof is provided with a pocket 11 for receiving the coolant used in the machine tool B and flowing out from the drain passage 9, and the pocket 1
A magnet roller 12 for adsorbing chips, abrasive grains, etc. mixed in the coolant overflowing from No. 1 is arranged, and the magnet roller 12 is connected to a motor (not shown).

A discharge port 13 is provided on the downstream side of the pocket 11 with the magnet roller 12 interposed therebetween.
Further, the dewatering roller 14 for squeezing the water admixed in the chips, abrasive grains and the like adsorbed by the magnet roller 12 is pressed against the magnet roller 12 and the scraper 15 is slidably contacted therewith. A sludge box 16 is arranged at the lower end.

Further, the discharge port 13 of the first purifying means is extended to the second purifying means 2. The second purifying means 2 is provided with a tray 17, and the tray 17 is arranged on the liquid surface of the storage tank 4a. As shown in FIG. 7, the peripheral surface and the bottom surface of the tray 17 are formed by a mesh plate 17b such as expanded metal or punching metal, and a filter material 18 such as a paper filter is attached to the inner surface thereof. A diffusion plate 19 and a magnet plate 20 are installed on the tray 17.

[0036] As shown in FIGS. 8 and 9, the diffusion pre
Over DOO 19 is formed in a relatively shallow box shape, the tray 17
It is mounted with a gentle inclination with respect to. This diffusion pre
Sponge the bottom of the over preparative 19, the cushion material 19a such as felt is loaded, expanded metal 19 thereon
b is attached. The discharge port 13 of the first purifying means 1 faces the upstream side of the diffusion plate 19, and the magnet plate 20 is connected to the downstream end of the diffusion plate 19 with a predetermined step. Has been done. The magnet plate 20 is the diffusion plate 1 described above.
It is installed in a state in which it is gently inclined in the direction from the upstream end to the downstream end. This magnet plate 20
A plurality of magnets 21 are embedded in the magnet, and the surface of the magnet 21 is exposed substantially on the same surface as the surface of the magnet plate 20.

The cleaning tank 4b of the coolant tank 4
The third purifying means 3 is disposed in. The third purifying means 3 is provided with a magnet rotating plate 22, and the magnet rotating plate 22 is arranged in parallel with the partition plate 5 partitioning the coolant tank 4 at a predetermined interval. An opening 5a is formed in the center of the upper end of the partition plate 5, and a rotary shaft 23 pivotally mounted on the center of rotation of the magnet rotating plate 22 has a bearing slightly above the center of the opening 5a. And the lower side of the magnet rotating plate 22 is immersed in the coolant retained in the cleaning tank 4b. Therefore, the magnet rotating plate 22 is arranged with one side surface thereof facing the opening 5a.

As shown in FIGS. 11 and 12, the magnet rotating plate 22 is composed of a central plate 22a made of a non-magnetic material such as resin, and a non-magnetic material such as resin covering both sides thereof. It has a three-layer structure with the thin plate 22b formed in the above, and a plurality of magnets 24 are embedded at substantially equal intervals on the circumference of the central plate 22a.
A pulley 25a is attached to the rotary shaft 23, and the pulley 25a is connected to a pulley 25b attached to a main shaft of a motor 26 via a belt 25c.

The magnet rotating plate 22 rotates clockwise toward the paper surface of FIG. 6, and a scraper 27 for wiping the surface of the magnet rotating plate 22 is arranged before the magnet rotating plate 22 is immersed in the coolant. At the lower end of the scraper 27, a fine powder collecting box 28 is arranged. As shown in FIG. 13, this fine powder accumulation box 28
A mesh plate 29 having a small hole is formed on the bottom surface of the filter, and a filter 30 is mounted on the mesh plate 29.

Next, the operation of the embodiment having the above structure will be described. The coolant stored in the cleaning tank 4b of the coolant tank 4 is sucked by the coolant pump 6 via the strainer 7, and is supplied to the cutting point (or grinding point) of the machine tool B via the supply pipe 8. Then, the coolant used in this machine tool B flows through the drain passage 9 into the pocket 11 provided in the main body 10 of the first cleaning means 1.

Then, the coolant that overflows from the pocket 11 passes through the magnet roller 12 that is rotationally driven by a motor (not shown) and is discharged from the discharge port 13. The coolant is the magnet roller 1
When passing through 2, the relatively large particles mainly composed of magnetic material such as cutting chips and abrasive particles adsorbed in the coolant are adsorbed, and at the same time, the particles mainly composed of non-magnetic material are It is attached via the already adsorbed powder particles.
The powder particles adsorbed on and attached to the magnet roller 12 are separated by the scraper 15 and accumulated in the sludge box 16 after water is extracted by the dehydrating roller 14. As a result, the first purifying means 1 makes it possible to remove 80% of impurities mainly composed of the magnetic material mixed in the coolant.
~ 90% is removed.

Then, the discharge port 1 of the first purification means 1
The coolant discharged from No. 3 is provided in the second purifying means 2.
When dropped onto the diffusion plate 19, this diffusion plate 1
Run down along the slope of 9. An expanded metal 19b is mounted on the diffusion plate 19, and the coolant is diffused in the width direction along the lattice of the expanded metal 19b, and at the same time, impurities such as grindstone powder remaining in the coolant have a relatively large specific gravity. Formed by the above grid
Is deposited on the stepped part.

The coolant which has been diffused by the diffusion plate 19 is dropped onto the magnet plate 20 flows down the entire surface of the diffusion plate 19 at a substantially constant speed. When this coolant flows down on the surface of the magnet plate 20, fine magnetic powder particles such as chips remaining in the coolant are adsorbed on the surface of the magnet 21 embedded in the magnet plate 20, At the same time, other impurities are attached to some extent via the powder particles adsorbed on the magnet 21.

After that, the coolant flowing down the magnet plate 20 is dropped onto the tray 17. A filter medium 18 is laid on the tray 17, and most of the impurities that cannot be completely removed by the series of purification steps described above are removed by the filter medium 18. The roughness of the filter medium 18 is
An appropriate one is selected according to the flow rate of the coolant and the amount of impurities such as chips and abrasive grains mixed during cutting or grinding.

Further, the diffusion plate 19 and the magnet plate 20 are removable, and when the accumulated or adhered impurities reach a predetermined amount, they are removed and cleaned, or a new diffusion plate 19 and a magnet plate 20 are used. Exchange. Similarly, the filter medium 18 is also replaced as appropriate when a predetermined amount of impurities is deposited.

The coolant that has been filtered by the filter medium 18 is then dropped into the storage tank 4a of the coolant tank 4 and retained therein. The first purifying means 1 and the second purifying means 2
Since almost all the impurities remaining in the coolant were removed in the coolant, only a small amount of fine impurities having a low specific gravity remained in the coolant retained in the storage tank 4a. Therefore, impurities were accumulated in the storage tank 4a. Instead, the growth of bacteria is prevented, so that the spoilage of the coolant is prevented, the generation of off-flavor is eliminated, and the coolant can be used for a long period of time by only replenishing the consumed coolant.

Then, of the coolant retained in the storage tank 4a, the coolant overflowing from the opening 5a of the partition plate 5 flows into the adjacent cleaning tank 4b. In this cleaning tank 4b, the magnet rotating plate 22 provided in the third cleaning means 3 is slowly rotated by the motor 26. A plurality of magnets 24 are mounted on the central plate 22a of the magnet rotating plate 22. When the magnet rotating plate 22 is sequentially immersed in the coolant and moved, fine impurities floating in the coolant are generated. Impurities having a relatively low specific gravity, such as oil components, which are attracted to the surface by the magnetic force of the magnet 24 and float on the liquid surface of the coolant, simultaneously adhere to the surface of the magnet rotating plate 22.

The impurities captured by the magnet rotating plate 22 are separated from the coolant by exposing the magnet rotating plate 22 from the liquid surface of the coolant, and the scraper is inserted before the magnet rotating plate 22 re-immerses in the coolant. It is wiped off at 27 and accumulated in the fine powder accumulation box 28. Since a filter 30 is attached to the bottom of the fine particle accumulation box 28 and the bottom surface of the fine particle accumulation box 28 is formed by a mesh plate 29 having small holes, impurities are added to the fine particle accumulation box 28. The coolant that has flown together is dropped into the coolant tank 4 through the filter 30 and the mesh plate 29.

The amount of impurities remaining in the coolant flowing from the storage tank 4a into the cleaning tank 4b is extremely small, and the amount of impurities trapped by the magnet rotating plate 22 is only a small amount of oil. Therefore, the impurities remain in the cleaning tank 4b. The coolant is maintained in a clean state with no rotten odor,
It can be used for a long time. As a result, not only can running costs required for coolant replacement be reduced,
The deterioration of the strength of the coolant pump 6 is prevented and the durability is improved. Further, since clean coolant can be supplied to the cutting point or the grinding point of the machine tool B, the life of the tool or the grindstone to be used becomes long, and the cutting condition in the cutting process is improved.

The central plate 22a of the magnet rotary plate 22 of the third cleaning means 3 is the central plate 22.
The plate itself may be a magnetized plate. Further, the magnet rotating plate 22 may be arranged on the storage tank 4a side.

By the way, the flow rate of the coolant used in the machine tool B or the discharge amount of the chips, abrasive grains and the like generated in the machine tool B is relatively large, and thus the storage tank 4a contains fine chips and the like. If impurities are likely to remain, as shown in FIGS. 14 and 15, a magnet conveyor 31 having a loop-shaped magnet sheet 31a is arranged at the bottom of the storage tank 4a below the second purification means 2. , The storage tank 4
Impurities such as fine chips floating in a may be adsorbed to the magnet sheet 31a. When a predetermined amount of impurities are adsorbed on the magnet sheet 31a or every predetermined time, the magnet conveyor 31 is rotated manually or via a motor to remove the impurities adsorbed on the magnet sheet 31a from the coolant tank 4a. Are sequentially exposed to the upper side of the sheet, and the scraper 32 slidingly contacting the magnet sheet 31a removes the impurities adsorbed on the magnet sheet 31a and accumulates them in the accumulating box 33 .

Further, the flow rate of the coolant supplied to the machine tool B and the discharge amount of chips, abrasive grains and the like from the machine tool B are relatively small, and the impurities mixed in the coolant are the first purification means 1. When it can be almost completely removed by the second cleaning means 2 and the second cleaning means 2, the coolant is made by a simple structure in which the third cleaning means 3 and the partition plate 5 for partitioning the inside of the coolant tank 4 are omitted. The tank 4 can be miniaturized. In that case, it is convenient to arrange the magnet bar 34 as an accessory for cleaning as shown in FIG. A magnet is built in the tip portion (a cubic portion in the figure) 34a of the magnet bar 34, or the tip portion 34a itself is magnetized, and the handle 43b is gripped to agitate the inside of the coolant tank 4. Then, impurities such as fine chips and the like floating in the coolant are adsorbed. Further, the collar 34c is provided on the tip portion 34a.
Are detachably attached, and the impurities attached to the tip portion 34a are removed by relatively sliding the collar 34c.

Further, as shown in FIG. 17, the diffusion plate 19 provided in the second purifying means 2 has a cushion material 19 a.
Instead of the expanded metal 19b, a plate 19c having vertical and horizontal lattice grooves 19d as a step may be mounted. In this case, the coolant flowing down the plate 19c diffuses along the lattice groove 19d and impurities are precipitated in the lattice groove 19d. Then, when the amount of impurities accumulated in the lattice groove 19d reaches a predetermined amount, it is removed and cleaned, or replaced with a new one. In addition, the pre
As shown in FIG. 18A, the grid grooves 19d of the port 19c are formed in a zigzag pattern in the coolant flow direction indicated by the arrow, or as shown in FIG. 18B. Various modes such as forming into a shape are conceivable. Moreover,
The same effect can be obtained by forming a step portion 19e having a sawtooth-shaped cross section as shown in FIG. 19 on the surface of the diffusion plate 19 instead of the lattice groove 19d.

[0054]

As described above, according to the first aspect of the invention, the step of disposing the second purifying means subsequent to the first purifying means and depositing and removing the impurities in the coolant in the second purifying means diffusion plate having a section, since there is provided a magnet plate that adsorbs impurities by the magnet, the relatively heavy impurities specific gravity, and an impurity mainly composed of magnetic material expansion
It is efficiently removed when flowing down the dispersion plate and the magnet plate. Then, the diffusion plate and the magnet plate are housed in a tray on which a filter medium is laid, so that fine impurities mixed in the coolant flowing down from the diffusion plate and the magnet plate are filtered when passing through the filter medium. Therefore, the coolant that has passed through the filter medium is almost completely free of all kinds of impurities, regardless of whether it is magnetic or non-magnetic, and as a result, the coolant is prevented from spoiling due to deposits, and a clean coolant is always available. Since it can be supplied via the coolant pump, the durability of the coolant pump is improved and
In machine tools, cutting conditions are improved, and the life of tools and grindstones used can be extended. Furthermore, when the coolant passes through the filter medium, most of the impurities have already been removed by the first cleaning unit and the second cleaning unit, so that clogging will occur even if the coarseness of the filter medium is made relatively fine. Hard to occur,
This filter material can also remove fine impurities.

[0055]

[0056]

[0057]

[0058]

[0059]

[0060]

According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the third purification means is provided following the first purification means and the second purification means, and the third purification means is provided. The magnet rotating plate provided on the adsorbs fine impurities mainly composed of magnetic material floating in the coolant, and also adsorbs impurities with a relatively low specific gravity such as oil floating on the coolant surface through the adsorbed impurities. Can be
The magnet exposed by the scraper from the coolant surface
Gently wipe the surface of the rotating plate to remove these impurities.
Therefore, the coolant can be made even cleaner. As a result, the coolant can be used for a long period of time only by replenishing the coolant consumed during use without replacing the coolant, which is economical. Then, a partition plate is interposed between the second cleaning means and the third cleaning means, and an opening is formed in the partition plate for guiding the overflowed coolant to the third cleaning means. By arranging one side surface oppositely, it is possible to efficiently attach impurities having a relatively low specific gravity such as powder particles and oil floating in the coolant flowing from the opening to one side surface of the magnet rotating plate .
It can be removed by a scraper .

According to the invention of claim 3, the diffusion plate
By forming the box in a box shape and providing a step on the bottom surface,
In addition to the effects of the invention according to claim 1 or claim 2,
When the coolant flows down the diffusion plate , it diffuses along the step portion, and it is possible to precipitate impurities having a relatively high specific gravity in a wide range and to deposit the precipitated impurities on the step portion. The precipitate can be removed efficiently.

[Brief description of drawings]

FIG. 1 is a perspective view of a first purifying unit, a second purifying unit, and a coolant tank.

FIG. 2 is a rear view showing the arrangement of the machine tool and the coolant purifier.

FIG. 3 is a right side view of FIG.

FIG. 4 is a schematic view of a coolant purification device.

FIG. 5 is a plan view of a coolant tank, a second purification device, and a third purification device.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a perspective view of a tray provided in the second cleaning means.

FIG. 8 is a side sectional view of a diffusion plate provided in the second purifying means.

FIG. 9 is a perspective view of a diffusion plate provided in the second purifying means.

FIG. 10 is a perspective view of a magnet plate provided in the second purifying means.

FIG. 11 is a front view of a rotary plate provided in the third purifying means.

12 is a sectional view taken along line XII-XII of FIG.

FIG. 13 is an enlarged cross-sectional view of a main part of a rotary plate provided in a third purifying means.

FIG. 14 is a partially enlarged cross-sectional view showing an aspect in which a magnet conveyor is arranged below the second purifying means.

FIG. 15 is a perspective view of a magnet conveyor

FIG. 16 is a perspective view of a magnet bar.

FIG. 17 is a side sectional view of a diffusion plate according to another embodiment.

FIG. 18 is a partially enlarged view of FIG.

FIG. 19 is a side sectional view of a diffusion plate according to another embodiment.

[Explanation of Codes] A Coolant Purifying Device 1 First Purifying Unit 2 Second Purifying Unit 3 Third Purifying Unit 5 Partition Plate 5a Opening 12 Magnet Roller 17 Tray 18 Filter Media 19 Diffusion Plates 19d, 19e Step 20 Magnet Plate 22 Magnet Rotating plate 22a Central plate 22b Thin plate 24 Magnet 27 Scraper

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-6-170115 (JP, A) JP-A-5-69270 (JP, A) JP-A-6-304842 (JP, A) Actual development Sho-59- 86256 (JP, U) Actual development 61-184643 (JP, U) Actual development 57-43943 (JP, U) Actual development 54-146479 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B01D 36/00 B01D 35/02 B03C 1/04-1/06 B23Q 11/10

Claims (3)

(57) [Claims] 1. A first purifying means for separating and removing impurities contained in a coolant used in a machine tool by a magnetic separator having a magnet roller, and a second purifying means arranged downstream of the first purifying means. And the second purifying means diffuses the coolant and
Stage for precipitating impurities mixed in the coolant
A diffusion plate having a portion and a magnet plate for adsorbing the impurities, and further, the second cleaning means is provided with a tray for accommodating the diffusion plate and the magnet plate, and the tray has a filter medium. Coolant purification device characterized by being installed. 2. A magnet rotating plate for adsorbing residual impurities by dipping the lower side in a coolant liquid surface downstream of the second purifying means and the magnet exposed from the coolant liquid surface.
A third purifying means having a scraper for wiping the surface of the rotary plate is disposed, a partition plate is interposed between the second purifying means and the third purifying means, and the partition plate overflows. The coolant purifying apparatus according to claim 1, wherein an opening is formed to guide the coolant to the third purifying means, and one side surface of the magnet rotating plate is provided opposite to the opening. 3. The coolant purifying apparatus according to claim 1, wherein the diffusion plate is formed in a box shape, and a step portion for depositing precipitated impurities is provided on the bottom surface of the diffusion plate . .