JP6437949B2 - Emulsion cleaning device - Google Patents

Description

  The present invention relates to an emulsion cleaning apparatus that performs cleaning of various workpieces to which dirt including water-soluble cutting oil is adhered, using an emulsion cleaning liquid obtained by mixing a hydrocarbon solvent containing a surfactant and water. About.

  As a cleaning method for cleaning a workpiece such as a metal part to which dirt including water-soluble cutting oil is attached, a method described in Patent Document 1 is known. In the cleaning method described here, a soiled workpiece is cleaned with a water-soluble cutting oil using a W / O emulsion type hydrocarbon-based cleaning agent. In addition, as the W / O emulsion type hydrocarbon-based cleaning agent, one having the characteristic of being separated into a hydrocarbon layer and an aqueous layer by standing for a predetermined time is used. Thereby, the aqueous layer containing dirt is separated and removed from the W / O emulsion type hydrocarbon-based cleaning agent after the workpiece cleaning, and the hydrocarbon-based cleaning agent can be used repeatedly.

  That is, in a cleaning method and a cleaning apparatus using a W / O emulsion type hydrocarbon cleaning agent (hereinafter referred to as an emulsion cleaning liquid), a hydrocarbon solvent and water are supplied to a cleaning tank at a predetermined ratio, and cleaning is performed. In the tank, ultrasonic vibration or mechanical stirring is performed to form a state of an emulsion cleaning liquid, and the workpiece is immersed therein for ultrasonic cleaning or the like. After the workpiece is lifted from the tank after cleaning, the emulsion cleaning liquid is allowed to stand for a predetermined time, a hydrocarbon solvent layer is formed on the upper side, and a water layer is formed on the lower side. Is forming. Dirt that has fallen from the workpiece due to washing accumulates at the bottom of the tank. The hydrocarbon-based solvent is regenerated by discharging water containing dirt from the bottom of the tank. By replenishing and mixing the required amount of water into the tank, an emulsion cleaning liquid is formed in the tank, and a new workpiece can be cleaned.

Japanese Patent No. 5458583

  In a cleaning device (hereinafter referred to as an emulsion cleaning device) that cleans a workpiece to which dirt including water-soluble cutting oil is attached using such an emulsion cleaning liquid, the contamination becomes severe after a predetermined number of cleanings. Thereafter, the emulsion cleaning liquid is allowed to stand in the cleaning tank after the workpiece is cleaned to form a layer separation state. After an appropriate layer separation state is formed, it is necessary to perform operations such as draining and removing water. If drainage is performed from the bottom of the tank with insufficient layer separation, the hydrocarbon solvent is also discharged together. Further, the dirt generated by the workpiece cleaning is not reliably separated and removed from the hydrocarbon solvent and remains as it is, and there is a possibility that the cleaning performance is deteriorated.

  In addition, since the dirt removed by the workpiece cleaning is accumulated in the cleaning liquid in the cleaning tank, generally, the cleaning liquid is drawn out from the bottom of the tank, and the dirt is separated and removed through a filter and returned to the tank again. In the case of the emulsion cleaning liquid, water having a large specific gravity is mainly drawn from the bottom side of the tank, so that there is a possibility that the separation and removal of dirt from the hydrocarbon solvent having a small specific gravity cannot be performed efficiently.

Furthermore, in mixing and stirring for forming the emulsion cleaning liquid, ultrasonic cleaning performed in a state where the workpiece is immersed in the emulsion cleaning liquid, bubbles are embraced in the cleaning liquid. If the bubble content is high, the washing performance of the emulsion washing solution is not preferred.

  Furthermore, in the cleaning using the emulsion cleaning liquid, it is necessary to be able to perform the workpiece cleaning operation without being interrupted by the hydrocarbon solvent regeneration process in order to realize the workpiece cleaning by 24-hour operation. .

  The subject of this invention pays attention to such a problem, and provides the emulsion washing | cleaning apparatus which can wash | clean efficiently the workpiece | work to which the dirt containing water-soluble cutting oil has adhered.

In order to solve the above problems, the emulsion cleaning apparatus of the present invention is:
It has an emulsion cleaning tank that immerses and cleans the workpiece to be cleaned using an emulsion cleaning liquid obtained by mixing a hydrocarbon-based solvent containing a surfactant and water,
The emulsion cleaning tank is provided with a layer separation confirmation window capable of visually confirming the layer separation state of the emulsion cleaning liquid, which is allowed to stand in the tank after the workpiece cleaning, from the outside of the tank.

In addition to the above configuration, the emulsion cleaning apparatus of the present invention immerses the workpiece after cleaning in a drainer made of a hydrocarbon-based solvent containing a surfactant, and adheres to the workpiece after cleaning. Has a draining tank to remove
The draining tank is provided with a water separation confirmation window capable of visually confirming a water separation state in the tank from outside the tank.

  Since the layer separation state and the water separation state can be confirmed visually from outside the tank, it is possible to prevent the operation of draining water from the emulsion washing tank and draining tank when the layer separation is insufficient. Therefore, it is also possible to prevent spending more time than necessary. Therefore, regeneration of the hydrocarbon solvent and draining operation can be performed reliably and efficiently.

The emulsion cleaning apparatus of the present invention comprises:
An emulsion cleaning tank for immersing and cleaning a workpiece to be cleaned using an emulsion cleaning liquid obtained by mixing a hydrocarbon-based solvent containing a surfactant and water;
A liquid circulation mechanism for discharging the stored liquid from the emulsion washing tank and passing it through a filter to remove foreign matter and then returning it to the emulsion washing tank;
Have
The bottom surface of the emulsion cleaning tank is defined by a deepest bottom surface part that forms the deepest part of the tank, and an inclined bottom surface part that is inclined toward the deepest bottom surface,
The liquid circulation mechanism includes two systems of discharge path portions that discharge the stored liquid from both the portion at a predetermined height from the bottom surface of the emulsion cleaning tank and the deepest bottom surface portion and guide it to the filter. It is characterized by being.

  In the emulsion cleaning tank, the emulsion cleaning liquid separates into layers, the hydrocarbon solvent with a low specific gravity moves upward, the water with a high specific gravity moves downward, and the dirt washed away from the work is stored in the tank. Accumulate on the bottom. The tank bottom is formed by the deepest part of the tank and the inclined bottom part inclined toward the tank, and drains water from the deepest part of the tank. Therefore, the water and dirt on the tank bottom side move to the deepest part of the tank along the inclined bottom surface part without staying in the corner between the tank bottom surface and the tank side surface, and the drainage channel opened there It is efficiently discharged through the part and circulates through the filter. Further, the hydrocarbon-based solvent staying on the upper side in the tank also circulates through the filter through the discharge passage portion opened at a predetermined height position. Therefore, dirt contained in the emulsion cleaning liquid can be reliably removed, and the cleaning ability can be maintained.

  Here, it is preferable that the liquid circulation mechanism includes a deaeration tank for performing a deaeration process on the stored liquid discharged from the emulsion cleaning tank. If air bubbles are embraced in the emulsion cleaning liquid, the cleaning ability is reduced. By performing the deaeration treatment, the cleaning ability of the emulsion cleaning liquid can be maintained.

  Instead of attaching a degassing tank to the liquid circulation path, a vacuum cleaning tank and a vacuum draining tank may be used as the emulsion cleaning tank and the draining tank, respectively.

Next, in order to realize the cleaning operation by 24-hour operation, the emulsion cleaning apparatus of the present invention is
An emulsion cleaning tank for immersing and cleaning a workpiece to be cleaned using an emulsion cleaning liquid obtained by mixing a hydrocarbon-based solvent containing a surfactant and water;
Two buffer tanks,
A liquid recovery mechanism for recovering the emulsion cleaning liquid after the workpiece cleaning from the emulsion cleaning tank to one buffer tank in an empty state;
A liquid supply mechanism for supplying a hydrocarbon solvent and water stored in a predetermined mixing ratio in the other buffer tank to the empty emulsion cleaning tank;
A drainage mechanism for discharging water containing dirt accumulated at the bottom thereof by layer separation caused by standing the emulsion cleaning liquid collected in the buffer tank;
A water supply mechanism for supplying water to the buffer tank;
It is characterized by having.

  While the workpiece cleaning operation is performed in the emulsion cleaning tank, the recovered operation of the recovered emulsion cleaning liquid can be performed in parallel in one buffer tank. That is, the emulsion cleaning liquid collected in the buffer tank is allowed to stand and the layer separation proceeds. The hydrocarbon solvent tank and the water layer are sufficiently separated from each other up and down to form a state where dirt is accumulated at the bottom of the tank. Then, water and dirt are extracted from the bottom of the tank and discharged. Replenish the tank with a new amount of water corresponding to the amount of water discharged, adjust the mixing ratio of the hydrocarbon-based solvent and water of the stored liquid in the tank, and prepare to supply it to the emulsion washing tank . By regenerating the emulsion cleaning liquid using two buffer tanks alternately, a mixed liquid for forming the emulsion cleaning liquid can be prepared without interrupting the work cleaning operation.

It is explanatory drawing of the emulsion cleaning apparatus which concerns on Embodiment 1 of this invention. FIG. 2 is a schematic front view of the emulsion cleaning apparatus of FIG. 1, a schematic internal configuration diagram when viewed from the front, and a schematic internal configuration diagram when viewed from the side. FIG. 2 is a schematic piping system diagram of the emulsion cleaning apparatus of FIG. 1. It is a schematic piping system diagram of the emulsion vacuum cleaning apparatus according to the second embodiment of the present invention. It is explanatory drawing of the emulsion vacuum cleaning apparatus which concerns on Embodiment 3 of this invention. FIG. 6 is a schematic piping system diagram of the emulsion vacuum cleaning apparatus of FIG. 5.

  Hereinafter, an embodiment of an emulsion cleaning apparatus to which the present invention is applied will be described with reference to the drawings.

[Embodiment 1]
1A and 1B are explanatory views showing the system configuration of the workpiece cleaning system according to the first embodiment. A workpiece cleaning system 1 includes an emulsion cleaning apparatus 2 for removing water-soluble dirt from a workpiece, and a workpiece cleaning for removing oily dirt and finishing cleaning (rinse cleaning) of the workpiece after the water-soluble dirt is removed. The apparatus 3 is comprised.

  The former emulsion cleaning apparatus 2 includes an emulsion cleaning tank 4 that performs ultrasonic cleaning on a workpiece using an emulsion cleaning liquid, and a draining tank 5 that performs draining processing on a workpiece after cleaning using a hydrocarbon solvent. It has. The emulsion cleaning liquid is a cleaning liquid in which a mixed liquid of a hydrocarbon-based solvent containing a surfactant and water is ultrasonically vibrated or stirred to be in an emulsion state. Further, when the liquid is left standing for a predetermined time, it is a cleaning liquid capable of forming a state in which layer separation progresses between the hydrocarbon solvent and water, and the hydrocarbon solvent layer and the water layer are separated vertically. For example, an emulsion cleaner obtained by ultrasonically vibrating or stirring a mixture of 90 to 85 parts by weight of a drainer HC-WS50 or HC-WS70 (trade name: manufactured by Tosoh Corporation) and 10 to 15 parts by weight of water. Can be used.

  The latter-stage workpiece cleaning apparatus 3 is, for example, a one-tank vacuum cleaning dryer using a hydrocarbon-based solvent. For example, a hydrocarbon one-bath vacuum cleaning dryer “Clover” manufactured and sold by the applicant of the present application. (Product name) is used. In this case, in the workpiece cleaning device 3, the hydrocarbon solvent used as a rough cleaning agent is supplied from the vacuum buffer tank 6 to the ultrasonic cleaning tank 7, and the workpiece is immersed in the hydrocarbon solvent in the ultrasonic cleaning. Is done. After cleaning, the ultrasonic cleaning tank 7 is once emptied, and a hydrocarbon solvent used as a finishing cleaning agent is supplied from the vacuum buffer tank 6 to perform ultrasonic cleaning as finishing cleaning on the workpiece. The workpiece after finish cleaning is pulled up from the liquid level, and in the space above the liquid level in the tank, it is exposed to the vapor of the hydrocarbon-based solvent supplied from the vacuum distiller / vapor generator 8 to perform the steam cleaning, Thereafter, the work is dried and taken out of the tank. As the workpiece cleaning device 3, a cleaning device for cleaning oily dirt having another configuration may be used.

  In the workpiece cleaning system 1 having this configuration, as shown in FIG. 1B, a workpiece to which dirt including water-soluble dirt is attached is passed through the preceding emulsion cleaning device 2 and the subsequent workpiece cleaning device 3. Cleaning is performed. For a work to which dirt including only oily dirt is attached, washing by the former emulsion washing apparatus 2 is omitted, and the work washing is performed using only the latter-stage work washing apparatus 3.

  2A to 2C are a schematic front view showing an example of the preceding stage emulsion cleaning apparatus 2 in the emulsion cleaning system 1, a schematic internal configuration diagram when viewed from the front, and a schematic internal configuration when viewed from the side. FIG. The emulsion cleaning apparatus 2 includes a rectangular frame-shaped apparatus housing 11, and an emulsion cleaning tank 4 and a water replacement tank 5 are arranged in the apparatus housing 11 in the lateral direction.

  The emulsion cleaning tank 4 is an upright rectangular cylindrical tank, and an upper end is an opening 12 for loading and unloading a workpiece. As shown in FIGS. 2B and 2C, the bottom surface 14 of the emulsion cleaning tank 4 is the deepest bottom surface portion 14a in which the central portion in the width direction at the front end forms the deepest portion of the tank. An inclined bottom surface portion 14b that is inclined downward from the left and right ends and the rear end is formed toward the deepest bottom surface portion 14a. The deepest bottom surface portion 14a extends downward in a cylindrical shape, and a water drainage port 14c having a circular cross section is opened at the bottom thereof.

At the bottom side portion of the front central portion of the emulsion cleaning tank 4, a circular emulsion cleaning tank viewing window 15 having a size including the deepest bottom surface portion 14a and the surrounding inclined bottom surface portion 14b connected to the deepest bottom surface portion 14a. Is formed. The emulsion cleaning tank viewing window 15 is formed of a transparent material that allows the inside of the tank to be visually confirmed, and is exposed to the front surface portion of the apparatus housing 11 as shown in FIG. The emulsion cleaning tank viewing window 15 functions as a layer separation confirmation window for visually confirming the layer separation state of the emulsion cleaning liquid that is allowed to stand in the tank after the workpiece cleaning as will be described later.

  The water replacement tank 5 is also a tank having the same shape as the emulsion cleaning tank 4, and the upper end is an opening 16 for loading and unloading a workpiece. As shown in FIGS. 2 (B) and 2 (C), the bottom surface 17 of the water replacement tank 5 is the deepest bottom surface portion 17a in which the central portion in the width direction at the front end forms the deepest portion of the tank. An inclined bottom surface portion 17b that is inclined downward from the left and right ends and the rear end is formed toward the deepest bottom surface portion 17a. The deepest bottom surface portion 17a extends downward in a cylindrical shape, and a water drain port 17c having a circular cross section opens at the bottom.

  A circular water replacement tank observation window 18 having a size including the deepest bottom surface portion 17a and the surrounding inclined bottom surface portion 17b connected to the deepest bottom surface portion 17a is formed in the bottom side portion of the front central portion of the water replacement tank 5. Is formed. The water replacement tank observation window 18 is formed of a transparent material that allows the inside of the tank to be visually confirmed, and is exposed to the front surface portion of the apparatus housing 11 as shown in FIG. The water replacement tank observation window 18 functions as a water separation confirmation window for confirming the water separation state in the tank by visual observation from the outside of the tank.

  FIG. 3 is a piping system diagram of the emulsion cleaning apparatus 2. In the emulsion cleaning tank 4, a mixture of a hydrocarbon solvent and water is supplied from outside and stored so that the emulsion cleaning liquid is formed at a predetermined liquid level. The workpiece to be cleaned is immersed in the stored liquid in the emulsion cleaning tank 4 through the opening 12 while being mounted on the cleaning basket 21 (1). An ultrasonic oscillator 22 is disposed on the bottom side of the emulsion cleaning tank 4. The stored liquid is mixed and emulsified by ultrasonic vibration generated by the ultrasonic oscillator 22 to generate an emulsion cleaning liquid. The workpiece is ultrasonically cleaned by the emulsion cleaning liquid, and dirt components such as water-soluble cutting oil are washed away. The cleaned workpiece is lifted out of the tank together with the cleaning basket 21 and is put into the adjacent water replacement tank 5.

  The emulsion cleaning tank 4 is provided with a liquid circulation mechanism 24 that discharges the liquid stored in the emulsion cleaning tank 4 to the outside and returns it to the tank. The liquid circulation mechanism 24 includes a liquid circulation line 25 and a circulation pump 26 for circulating the liquid via the liquid circulation line 25. The liquid circulation line 25 includes a side discharge path portion 25a for discharging liquid from a portion at a predetermined height from the bottom surface 14 of the emulsion cleaning tank 4, and a drain line 23 connected to the drain port 17c of the deepest bottom surface portion 14a. And a bottom discharge passage portion 25b branched from the bottom. The side discharge passage portion 25 a and the bottom discharge passage portion 25 b merge and then communicate with the suction port of the circulation pump 26 via the deaeration tank 27. The portion of the liquid circulation line 25 on the discharge port side of the circulation pump 26 communicates with the bottom surface 14 of the emulsion cleaning tank 4 through a filter 28 for removing foreign matter.

  The state of contamination of the emulsion cleaning liquid can be confirmed visually through the emulsion cleaning tank viewing window 15. In order to remove dirt and the like, the liquid circulation line 25 is opened while the drainage line 23 is closed, the circulation pump 26 is driven, and the liquid stored in the emulsion cleaning tank 4 passes through the deaeration tank 27 and the filter 28. And circulate. As a result, the stored liquid, that is, the hydrocarbon solvent and water are deaerated, and the contaminated contamination components are removed. The exhaust gas from the deaeration tank 27 is supplied to the gas-liquid separation tank 29 and subjected to a gas-liquid separation process.

  After the workpiece cleaning for a predetermined batch in the emulsion cleaning tank 4 is completed, the emulsion cleaning liquid in the emulsion cleaning tank 4 is left to stand for a predetermined time. As a result, the emulsion cleaning liquid is separated into layers, separated into a hydrocarbon-based solvent and water, and the dirt component also accumulates on the bottom side. The state of layer separation and the state of sedimentation of dirt components can be confirmed visually through the emulsion cleaning tank viewing window 15.

  After the layer separation state is formed, a drainage line 23 communicating with the drain port 17c is opened on the bottom surface of the emulsion cleaning tank 4, and water containing dirt components and dirt components is supplied to a drain tank (not shown). Discharge.

  Next, in the water replacement tank 5, a hydrocarbon-based solvent containing a surfactant is stored as a draining agent so as to have a predetermined liquid level. The cleaning basket 21 (2) on which the workpiece after cleaning is mounted is immersed in the drainer for a predetermined time. Thereby, the water adhering to the workpiece is separated and collected on the bottom surface side of the water replacement tank 5 due to the specific gravity difference. The drained state can be confirmed visually through the water replacement tank observation window 18. After the water replacement state is formed, the drainage line 30 communicating with the water draining port 17c on the bottom of the tank is opened, and the water draining process is performed.

  The work after draining is lifted out of the tank together with the cleaning basket 21 (2) and supplied to the subsequent work cleaning device 3 disposed adjacent to the hydrocarbon oil solvent and oily dirt. .

[Embodiment 2]
FIG. 4 is a piping system diagram showing a two-tank vacuum emulsion cleaning apparatus. A vacuum emulsion cleaning apparatus 2A shown in this figure is a cleaning apparatus that can be used in place of the above-described emulsion cleaning apparatus 2.

  The vacuum emulsion cleaning apparatus 2A includes a vacuum emulsion cleaning tank 4A as a first tank and a vacuum draining tank 5A as a second tank. These vacuum emulsion cleaning tank 4A and vacuum draining tank 5A are tanks of the same shape, and the opening at the upper end thereof can be sealed airtight by doors 31 and 32. Further, the bottom surfaces 33 and 34 of the vacuum emulsion cleaning tank 4 and the vacuum draining tank 5A are inclined bottom surface portions 33b and 34b that are inclined to one side as a whole, and these ends are the deepest bottom surface portions 33a and 34a. Yes.

  Drain lines 35 and 36 communicate with these deepest bottom surface portions 33a and 34a. The vacuum emulsion cleaning tank 4A is additionally provided with a liquid circulation mechanism 37 that discharges the liquid stored in the vacuum emulsion cleaning tank 4A to the outside and returns it to the tank. The liquid circulation mechanism 37 includes a liquid circulation line 38 and a circulation pump 39 for circulating the liquid via the liquid circulation line 38. The liquid circulation line 38 includes a discharge path portion 38a for discharging liquid from a portion at a predetermined height from the bottom surface 33 of the emulsion cleaning tank 4A, and a drainage line 35 connected to a water drain port formed in the deepest bottom surface portion 33a. And a discharge path portion 38b branched from the. Both discharge passage portions 38a and 38b are joined to the suction port of the circulation pump 39 after joining. A portion of the liquid circulation line 38 on the discharge port side of the circulation pump 39 communicates with the bottom surface 33 of the emulsion cleaning tank 4A via a filter 40 for removing foreign matter.

  The workpiece cleaning in the emulsion cleaning tank 4A is performed by ultrasonic cleaning by the ultrasonic oscillator 41 arranged in a predetermined pressure-reduced tank. Further, the cleaning liquid is removed from the cleaned workpiece in the vacuum draining tank 5A. Since cleaning and draining are performed in a state where the air is shut off, it is possible to prevent the cleaning liquid and draining liquid from embedding air bubbles and thereby reducing the cleaning capacity and draining capacity.

[Embodiment 3]
FIG. 5 is an explanatory diagram showing a system configuration of the workpiece cleaning system according to the third embodiment. The work cleaning system 51 is a 24-hour system, and includes an emulsion cleaning device 52 for removing water-soluble dirt from the work, and removal of oily dirt from the work after the water-soluble dirt has been removed and finish cleaning ( And a workpiece cleaning device 53 for performing (rinsing).

  The former emulsion cleaning device 52 includes a vacuum emulsion ultrasonic cleaning tank 54 that ultrasonically cleans the workpiece using an emulsion cleaning liquid, and a vacuum that performs a draining process on the workpiece after cleaning using a hydrocarbon solvent. A draining tank 55 is provided. The emulsion cleaning liquid is a cleaning liquid in which a mixed liquid of a hydrocarbon-based solvent containing a surfactant and water is ultrasonically vibrated or stirred to be in an emulsion state. Further, when the liquid is left standing for a predetermined time, it is a cleaning liquid capable of forming a state in which layer separation progresses between the hydrocarbon solvent and water, and the hydrocarbon solvent layer and the water layer are separated vertically.

  The latter-stage work cleaning device 53 is a three-tank vacuum cleaning / drying machine using a hydrocarbon solvent in this example, and includes, for example, a degassing ultrasonic cleaning tank 56, a vacuum ultrasonic cleaning tank 57, and a vacuum vapor. And a washing / drying tank 58.

  In the workpiece cleaning system 51 having this configuration, a workpiece to which dirt including water-soluble dirt is attached is cleaned through the preceding-stage emulsion cleaning device 52 and the subsequent-stage workpiece cleaning device 53. For a workpiece to which dirt including only oily dirt is attached, washing by the former stage emulsion washing device 52 is omitted, and workpiece washing is performed using only the latter-stage workpiece washing device 53.

  FIG. 6 is a piping system diagram showing an example of a preceding emulsion cleaning apparatus 52 in the emulsion cleaning system 51. As described above, the emulsion cleaning device 52 includes the vacuum emulsion ultrasonic cleaning tank 54 as the first tank and the vacuum draining tank 55 as the second tank. These vacuum emulsion ultrasonic cleaning tank 54 and vacuum draining tank 55 are tanks having substantially the same shape, and the opening at the upper end thereof can be sealed airtight by doors 61 and 62. The bottom surfaces 63 and 64 of the vacuum emulsion ultrasonic cleaning tank 54 and the vacuum draining tank 55 are inclined bottom surface parts 63b and 64b that are inclined to one side as a whole, and these ends are the deepest bottom surface parts 63a and 64a. It has become.

  These deepest bottom surface portions 63a and 64a communicate with drain lines 65 and 66, respectively. Further, the vacuum emulsion ultrasonic cleaning tank 54 is provided with a liquid circulation mechanism 67 that discharges the stored liquid in the vacuum emulsion ultrasonic cleaning tank 54 to the outside and returns it to the tank. The liquid circulation mechanism 67 includes a liquid circulation line 68 and a circulation pump 69 for circulating the liquid via the liquid circulation line 68. The liquid circulation line 68 is connected to a side discharge path portion 68a for discharging liquid from a portion at a predetermined height position from the bottom surface 63 of the vacuum emulsion ultrasonic cleaning tank 54, and a drain port formed in the deepest bottom surface portion 63a. A bottom surface discharge path portion 68 b branched from the drainage line 65. Both discharge passage portions 68a and 68b are joined to the suction port of the circulation pump 69 after joining. A portion of the liquid circulation line 68 on the discharge port side of the circulation pump 69 communicates with the bottom surface 63 of the vacuum emulsion ultrasonic cleaning tank 54 via a filter 70 for removing foreign matter.

  Here, the emulsion cleaning device 52 of this example includes a liquid recovery and supply mechanism 73 having a first buffer tank 71 and a second buffer tank 72, and a drain for draining water from the first and second buffer tanks 71 and 72. Lines 74a and 74b, a reserve tank 75 for supplying hydrocarbon solvents to the first and second buffer tanks 71 and 72, and a water supply line for supplying city water to the first and second buffer tanks 71 and 72 76.

The liquid recovery supply mechanism 73 has a liquid recovery function for recovering the emulsion cleaning liquid after the workpiece cleaning from the vacuum emulsion ultrasonic cleaning tank 54 to one buffer tank in an empty state, and an empty vacuum emulsion ultrasonic cleaning tank in an empty state. 54, a liquid supply function of supplying a liquid mixture of a hydrocarbon solvent and water stored in a predetermined mixing ratio in the other buffer tank is provided. The drain lines 74a and 74b are drainage paths for discharging water containing dirt accumulated at the bottom of the emulsion cleaning liquid collected in each buffer tank by layer separation caused by standing.

  The liquid recovery and supply mechanism 73 includes a recovery line 77 branched from a downstream portion of the filter 70 in the liquid circulation line 68 attached to the vacuum emulsion ultrasonic cleaning tank 54, and a downstream portion of the recovery line 77. Is bifurcated and connected to the first and second buffer tanks 71 and 72, respectively. The recovery of the liquid from the first and second buffer tanks 71 and 72 is performed via the liquid circulation line 68, the circulation pump 69, and the recovery line 77.

  The liquid recovery and supply mechanism 73 branches from the drain lines 74a and 74b attached to the first and second buffer tanks 71 and 72, and joins each other to connect to the vacuum emulsion ultrasonic cleaning tank 54. Supply line 78 is provided. The first and second buffer tanks 71 and 72 are located above the vacuum emulsion ultrasonic cleaning tank 54, and supply lines from the first and second buffer tanks 71 and 72 are caused by a difference in head position between them. The liquid is supplied to the vacuum emulsion ultrasonic cleaning tank 54 through 78.

  For example, it is assumed that the hydrocarbon solvent and water are stored in the second buffer tanks 71 and 72 at a predetermined mixing ratio. In this state, first, the liquid stored in one of the first buffer tanks 71 passes from the drain line 74 at the bottom via the supply line 78 to the vacuum emulsion ultrasonic cleaning tank 54 held in a predetermined reduced pressure state. Supplied. The vacuum emulsion ultrasonic cleaning tank 54 is supplied and stored with a mixture of a hydrocarbon solvent and water for forming an emulsion cleaning liquid so as to have a predetermined liquid level. The first buffer tank 71 that has finished supplying the liquid becomes empty.

  The workpiece to be cleaned is immersed in the stored liquid in the vacuum emulsion ultrasonic cleaning tank 54 while being mounted on the cleaning basket 81. An ultrasonic oscillator 82 is disposed on the bottom side of the vacuum emulsion ultrasonic cleaning tank 54. The stored liquid is mixed and emulsified by ultrasonic vibration generated by the ultrasonic oscillator 82 to generate an emulsion cleaning liquid. The workpiece is ultrasonically cleaned by the emulsion cleaning liquid, and dirt components such as water-soluble cutting oil are washed away. The cleaned workpiece is lifted out of the tank together with the cleaning basket 81 and put into the adjacent vacuum draining tank 55.

  The emulsion cleaning liquid in the vacuum emulsion ultrasonic cleaning tank 54 is removed by the filter 70 by circulating the emulsion cleaning liquid through the liquid circulation line 68. Further, the dirt component accumulated at the bottom of the vacuum emulsion ultrasonic cleaning tank 54 is discharged through the drainage line 65 by opening the drainage line 65.

  After the workpiece is repeatedly cleaned in the vacuum emulsion ultrasonic cleaning tank 54, the emulsion cleaning liquid is replaced. The used emulsion cleaning liquid is recovered from the vacuum emulsion ultrasonic cleaning tank 54 via the recovery line 77 to the empty first buffer tank 71. The recovered emulsion cleaning liquid is left to stand in the first buffer tank 71 for a predetermined period of time, a layer separation state is formed, the lower water layer and the soil component are accumulated, and the upper hydrocarbon solvent Is played. The water containing the dirt component is discharged to a drain tank (not shown) through a drain line 74a. Further, the reduced amount of water is supplied through the city water supply line 76.

  On the other hand, the used emulsion cleaning liquid is discharged into the first buffer tank 71 to be emptied, and the vacuum emulsion ultrasonic cleaning tank 54 is immediately supplied from the second buffer tank 72 through the supply line 78 to a predetermined amount. A hydrocarbon solvent and water are supplied and stored. Therefore, in the vacuum emulsion ultrasonic cleaning tank 54, the workpiece cleaning can be performed by forming the emulsion cleaning liquid from the liquid mixture supplied from the second buffer tank 72 without waiting for the regeneration of the emulsion cleaning liquid. The second buffer tank 72 after supplying the liquid becomes empty.

  During the work cleaning operation, the first buffer tank from which the used emulsion cleaning liquid has been collected is regenerated in parallel, and the predetermined amount of the hydrocarbon-based solvent and water from which dirt is removed is mixed with water. A state in which the liquid mixture is stored is formed. Thus, by repeating the operation of supplying the cleaning liquid from one of the first and second buffer tanks 71 and 72 and collecting and regenerating the used cleaning liquid to the other, it is possible to realize emulsion cleaning that operates for 24 hours.

1 Work Cleaning System 2 Emulsion Cleaning Device 2A Vacuum Emulsion Cleaning Device 3 Work Cleaning Device 4 Emulsion Cleaning Tank 4A Vacuum Emulsion Cleaning Tank 5 Water Replacement Tank 5A Vacuum Draining Tank 6 Vacuum Buffer Tank 7 Ultrasonic Cleaning Tank 8 Vacuum Distiller / Vapor Generation Device 11 Device housing 12 Opening / unloading part 14 Workpiece bottom surface 14a Deepest bottom surface part 14b Inclined bottom surface part 14c Drain outlet 15 Emulsion cleaning tank viewing window 16 Workpiece carrying in / out opening 17 Bottom surface 17a Deepest bottom surface part 17b Inclined bottom surface part 17c Water Drain 18 Water replacement tank viewing window 21 (1), 21 (2) Cleaning basket 22 Ultrasonic oscillator 23 Drain line 24 Liquid circulation mechanism 25 Liquid circulation line 25a Side discharge path portion 25b Bottom discharge path portion 26 Circulation pump 27 Deaeration tank 28 Filter 29 Gas-liquid separation tank 30 31, 32 Door 33, 34 Bottom 33a, 34a Deepest bottom 33b, 34b Inclined bottom 35, 36 Drain line 37 Liquid circulation mechanism 38 Liquid circulation line 38a Drain path 38b Drain path 39 Circulation pump 40 Filter 41 Sonic oscillator 51 Work cleaning system 52 Emulsion cleaning device 53 Work cleaning device 54 Vacuum emulsion ultrasonic cleaning tank 55 Vacuum draining tank 56 Degassing ultrasonic cleaning tank 57 Vacuum ultrasonic cleaning tank 58 Vacuum vapor cleaning and drying tank 61, 62 Door 63 64 Bottom surface 63a, 64a Deepest bottom surface portion 63b, 64b Inclined bottom surface portion 65, 66 Drain line 67 Liquid circulation mechanism 68 Liquid circulation line 68a Side surface discharge path portion 68b Bottom surface discharge path portion 69 Circulation pump 70 Foreign matter removing filter 71 1 buffer tank 72 2nd buffer tank 7 Liquid recovery supply mechanism 74a, 74b draining line 75 the reserve tank 76 water replenishment line 77 return line 78 feed line

Claims (9)

An emulsion cleaning tank for immersing and cleaning the workpiece to be cleaned while applying ultrasonic vibration to an emulsion cleaning liquid obtained by mixing a hydrocarbon solvent containing a surfactant and water ;
A liquid circulation mechanism for discharging the stored liquid from the emulsion washing tank and passing it through a filter to remove foreign matter and then returning it to the emulsion washing tank;
Have
The liquid circulation mechanism includes a deaeration tank that performs a deaeration process on the stored liquid discharged from the emulsion cleaning tank,
The said emulsion washing tank is an emulsion washing apparatus provided with the layer separation confirmation window which can confirm the layer separation state of the said emulsion washing | cleaning liquid left still in a tank after workpiece | work washing | cleaning visually from the outside of a tank. In claim 1,
I have a draining tank to remove the water adhering to the workpiece after cleaning by immersing the workpiece after cleaning in a draining agent consisting of a hydrocarbon solvent containing a surfactant,
The draining tank is an emulsion cleaning apparatus provided with a water separation confirmation window capable of visually confirming a water separation state in the tank from outside the tank. In claim 1 or 2 ,
The bottom surface of the emulsion cleaning tank is defined by a deepest bottom surface part that forms the deepest part of the tank, and an inclined bottom surface part that is inclined toward the deepest bottom surface part,
The liquid circulation mechanism includes two systems of discharge path portions that discharge the stored liquid from both the portion at a predetermined height from the bottom surface of the emulsion cleaning tank and the deepest bottom surface portion and guide it to the filter. Emulsion cleaning device. In any one of claims 1 to 3,
Two buffer tanks,
A liquid recovery mechanism for recovering the emulsion cleaning liquid after the workpiece cleaning from the emulsion cleaning tank to one buffer tank in an empty state;
A liquid supply mechanism for supplying a liquid mixture of a hydrocarbon solvent and water stored in a predetermined mixing ratio in the other buffer tank to the empty emulsion cleaning tank;
A drainage mechanism for discharging water containing dirt accumulated at the bottom thereof by layer separation caused by standing the emulsion cleaning liquid collected in the buffer tank;
A water supply mechanism for supplying water to the buffer tank;
Emulsion cleaning device. An emulsion cleaning tank for immersing and cleaning a workpiece to be cleaned using an emulsion cleaning liquid obtained by mixing a hydrocarbon-based solvent containing a surfactant and water;
A liquid circulation mechanism for discharging the stored liquid from the emulsion washing tank and passing it through a filter to remove foreign matter and then returning it to the emulsion washing tank;
Have
The bottom surface of the emulsion cleaning tank is defined by a deepest bottom surface part that forms the deepest part of the tank, and an inclined bottom surface part that is inclined toward the deepest bottom surface part,
The liquid circulation mechanism discharges the stored liquid from both the predetermined height position from the bottom surface of the emulsion cleaning tank to the liquid level of the stored liquid and the deepest bottom surface portion and guides it to the filter. Emulsion cleaning device with system drainage path. In claim 5,
The said liquid circulation mechanism is an emulsion washing | cleaning apparatus provided with the deaeration tank which performs the deaeration process to the stored liquid discharged | emitted from the said emulsion washing tank. In claim 5,
The emulsion cleaning tank is a vacuum cleaning tank,
I have a draining tank to remove the water adhering to the workpiece after cleaning by immersing the workpiece after cleaning in a draining agent consisting of a hydrocarbon solvent containing a surfactant,
The emulsion cleaning apparatus, wherein the draining tank is a vacuum draining tank. In any one of claims 5 to 7,
Two buffer tanks,
A liquid recovery mechanism for recovering the emulsion cleaning liquid after the workpiece cleaning from the emulsion cleaning tank to one buffer tank in an empty state;
A liquid supply mechanism for supplying a liquid mixture of a hydrocarbon solvent and water stored in a predetermined mixing ratio in the other buffer tank to the empty emulsion cleaning tank;
A drainage mechanism for discharging water containing dirt accumulated at the bottom thereof by layer separation caused by standing the emulsion cleaning liquid collected in the buffer tank;
A water supply mechanism for supplying water to the buffer tank;
Emulsion cleaning device. An emulsion cleaning tank for immersing and cleaning a workpiece to be cleaned using an emulsion cleaning liquid obtained by mixing a hydrocarbon-based solvent containing a surfactant and water;
Two buffer tanks,
A liquid recovery mechanism for recovering the emulsion cleaning liquid after the workpiece cleaning from the emulsion cleaning tank to one buffer tank in an empty state;
A liquid supply mechanism for supplying a liquid mixture of a hydrocarbon solvent and water stored in a predetermined mixing ratio in the other buffer tank to the empty emulsion cleaning tank;
A drainage mechanism for discharging water containing dirt accumulated at the bottom thereof by layer separation caused by standing the emulsion cleaning liquid collected in the buffer tank;
A water supply mechanism for supplying water to the buffer tank;
Emulsion cleaning device.

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