JPH0671234A - Work washer - Google Patents

Abstract

PURPOSE:To stably obtain the detergency of a solvent for a long time and to improve the separation efficiency of oil content by providing a prewashing means where unwashed work is washed with city water in the preceding stage of a work immersion tank where unwashed work is immersed in the solvent to wash it. CONSTITUTION:After unwashed work W is moved to the shower washing position of the 1st washing tank 2, a circulation pump 39 is operated to eject clean city water M discharged from an oil content washing nozzle 8, causing the work to be given shower washing, allowing oily oil content L stuck to the work W to be removed by washing. After that, the whole work W is immersed in city water M stored in the 1st washing tank 2 and an ultrasonic vibrator 7 arranged in the tank 2 is vibrated to give the work ultrasonic washing. Next, the whole work is immersed in a clean alkaline solvent Y stored in the 2nd washing tank 3 to remove residual fine oil content L stuck to the work W by washing. Or an ultrasonic vibrator 11 in the tank 3 is vibrated to give the work W ultrasonic washing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work cleaning apparatus used for cleaning and removing oily oil components adhering to works such as automobile parts, cutting parts and press parts.

[0002]

2. Description of the Related Art Conventionally, as a method for cleaning a work as in the above-mentioned example, for example, an uncleaned work is directly immersed in an alkaline solvent stored in a cleaning tank to remove an oil-based material attached to the work. Wash off the oil. After that, there is a method in which the work is successively immersed in tap water and pure water stored in the next cleaning tank to finish cleaning.

[0003]

However, when the unwashed workpiece is directly immersed in the alkaline solvent for washing treatment as described above, the oily oil adhering to the entire workpiece is dissolved in the alkaline solvent. The more the work is washed, the more rapidly the amount of oil dissolved in the alkaline solvent increases,
There is a problem that the detergency of the alkaline solvent decreases in a short period of time. Further, even if the alkali solvent used for cleaning the workpiece is circulated and supplied to the oil-water separator to separate only the oil component, the solvent and the oil component are completely separated because the oil component is dissolved in the alkali solvent. It is difficult to do so, and there is a problem in that the oil separation efficiency is poor.

In view of the above problems, the present invention preliminarily cleans an unwashed work with tap water and then immerses it in a solvent to carry out a cleaning treatment, whereby the cleaning power of the solvent can be stably obtained for a long period of time, and the oil content It is an object of the present invention to provide a work cleaning device that can improve the separation efficiency of the work.

[0005]

According to a first aspect of the present invention, there is provided a work cleaning device, wherein a work is immersed in a solvent to wash the unwashed work, and the work is washed with tap water before the work dipping tank. It is a work cleaning device provided with a preliminary cleaning means for processing.

According to a second aspect of the present invention, there is provided a work washing apparatus which showers tap water on the work in front of a work dipping tank in which an unwashed work is dipped in a solvent for washing treatment. It is a work cleaning device provided with a cleaning means.

According to a third aspect of the present invention, there is provided a workpiece cleaning apparatus, wherein an unwashed workpiece is immersed in a solvent and is subjected to a cleaning treatment. It is a work cleaning device provided with ultrasonic cleaning means.

According to a fourth aspect of the present invention, there is provided a work washing apparatus in which a non-washed work is soaked in a solvent to perform a washing treatment. It is a work cleaning apparatus provided with a cleaning means and an ultrasonic cleaning means for immersing the work in tap water to perform ultrasonic cleaning.

[0009]

The work cleaning device according to claim 1 of the present invention is
The pre-cleaning means is driven to pre-clean the uncleaned work with clean tap water, and the work is immersed in the solvent stored in the work dipping tank for cleaning, so that the work is dissolved in the solvent. The amount of oil is greatly reduced, and the detergency is stable for a long period of time.

According to a second aspect of the present invention, there is provided a work cleaning device, in which shower cleaning means is driven to spray clean tap water on an uncleaned work to perform shower cleaning, and then the work is immersed in the work dipping tank. Since the work is immersed in the solvent and washed, the same effect as that of the apparatus according to the first aspect can be obtained.

According to a third aspect of the present invention, in the work cleaning apparatus, the ultrasonic cleaning means is driven to immerse the uncleaned work in clean tap water for ultrasonic cleaning, and then stored in the work immersion tank. Since the work is immersed in the liquefied solvent and the cleaning process is performed, the same effect as that of the apparatus according to the first aspect can be obtained.

According to a fourth aspect of the present invention, in the work cleaning device, the shower cleaning means is driven to wash the uncleaned work with shower using clean tap water, and then the ultrasonic cleaning means is driven. Is immersed in clean tap water and ultrasonically cleaned. After this, since the work is immersed in the solvent stored in the work immersion tank for cleaning, the amount of oil dissolved in the solvent is greatly reduced as compared with the apparatus according to claim 2 or 3. The detergency is stable for a long time.

[0013]

According to the present invention, since the oily oil adhered to the unwashed work is pre-washed with tap water and then washed with a solvent such as an alkaline solvent, the amount of oil dissolved in the solvent is greatly increased. It is possible to prevent the cleaning power of the solvent from being deteriorated in a short period of time by the cleaning process of the work, and the cleaning power of the solvent can be stably obtained for a long period of time. Moreover, since the oil content is emulsified in the tap water used for cleaning the workpiece, the oil content emulsified in the tap water can be compared to the method of separating and recovering the oil content dissolved in the alkaline solvent as in the conventional example. It is extremely easy to separate and collect, and it is possible to improve the efficiency of separating oil by completely separating tap water and oil.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. The drawing shows a work cleaning device used to prevent the detergency of the solvent from decreasing in a short period of time. In FIG. 1, the work cleaning device 1 is designed to remove oily oil L attached to a work W from a tap water. A first cleaning tank 2 for shower cleaning and ultrasonic cleaning with water M, and a second cleaning tank 3 for immersing the pre-cleaned workpiece W in an alkaline solvent Y for cleaning treatment.
A third cleaning tank 4 in which the work W is immersed in tap water M for cleaning before the final cleaning; a fourth cleaning tank 5 in which the pre-cleaned work W is shower-cleaned with pure water G; In this case, it is composed of an oil / water separation device 6 for separating and recovering the oil component L emulsified in the tap water M.

The above-mentioned first cleaning tank 2 stores a predetermined amount of clean tap water M at a water storage level in which the entire work W is immersed,
An ultrasonic vibrator 7 for ultrasonically vibrating tap water M is arranged on the bottom wall surface of the tank, and an oil cleaning nozzle 8 is arranged at the shower cleaning position set on the upper part of the tank so as to face the work W. At the same time, the ejection direction of the oil cleaning nozzle 8 is fixed toward the work W. In addition, the water surface cleaning nozzle 9 is provided at the upper right wall surface of the first cleaning tank 2 at a height position that is horizontal to the water surface portion of the tap water M stored in the same tank, and the same water surface cleaning is performed. The discharge direction of the nozzle 9 is fixed toward the oil recovery tank 10 side which is continuously provided on the upper left wall surface. That is, when the oil L attached to the work W is removed by washing, a method of spraying tap water M to the work W stopped moving to the shower washing position to perform the shower washing, and an ultrasonic transducer arranged in the same tank 11 vibration (for example, 27 KHz
It is possible to select a method of ultrasonically cleaning the work W with a vibration frequency of 200 KHz).

The above-mentioned second cleaning tank 3 stores a predetermined amount of a clean alkaline solvent Y at a liquid level in which the whole work W is immersed, and ultrasonically vibrates the alkaline solvent Y on the bottom wall surface of the tank. The ultrasonic transducer 11 is provided, and the upper wall surface and the lower wall surface of the same tank are connected to each other by the circulation path 14 via the circulation pump 12 and the filter 13. That is, when the oil L attached to the work W is removed by washing, a method of immersing the whole work W in the alkaline solvent Y stored in the second washing tank 3 to perform a cleaning treatment, and a method of arranging the same in the same tank Ultrasonic transducer 11
Vibrate (for example, vibration frequency of 27KHz-200KHz)
And a method of ultrasonically cleaning the work W can be selected.
At this time, the circulation pump 12 is driven so that the alkaline solvent Y stored in the second cleaning tank 3 is circulated and supplied while being cleanly filtered by the filter 13.

The above-mentioned third cleaning tank 4 stores a predetermined amount of clean tap water M at a liquid storage level in which the entire work W is immersed,
An ultrasonic transducer 15 for ultrasonically vibrating the tap water M is disposed on the bottom wall surface of the tank, and the circulation path 1 is provided between the upper wall surface and the lower wall surface of the tank via a circulation pump 16 and a filter 17.
It connects with 8. That is, when cleaning and removing the solvent adhering to the work W, a method of immersing the whole work W in the tap water M stored in the third cleaning tank 4 for cleaning treatment, and an ultrasonic wave arranged in the same tank The vibrator 15 vibrates (for example, 27
A method of ultrasonically cleaning the work W by applying a vibration frequency of KHz to 200 KHz) can be selected. At this time, circulation pump 1
6 is driven, and tap water M stored in the third cleaning tank 4 is circulated and supplied while being cleanly filtered by the filter 17.

In the above-mentioned fourth cleaning tank 5, the pure water cleaning nozzles 19, 19 are arranged facing the work W at the shower cleaning position set inside the same, and the pure water cleaning nozzles 19, 19 are also provided. The discharge direction of 19 is fixed toward the work W. In addition, a solenoid valve 20 is attached to each pure water cleaning nozzle 19, 19.
Also, a pure water supply passage 22 is connected via a pressure feed pump 21, and a drain passage 23 for discharging used pure water G is connected to the lower wall surface of the tank. That is, the pressure pump 21 is driven to supply the pure water G stored in the pure water supply source (not shown) to the pure water cleaning nozzles 19 and 19, and the pure water cleaning nozzles 19 and 19 discharge the pure water G. The work W is washed with pure water G. In addition, the used pure water G temporarily stored in the bottom of the tank is discharged from the drainage channel 23 for wastewater treatment or regeneration treatment.

The above-mentioned oil-water separation device 6 has a first separation tank 24 and a second separation tank 25 below the first cleaning tank 2 described above.
And the third separation tank 26, the second separation tank 25 is arranged at the upstream position of the first separation tank 24, and the third separation tank 26 is arranged at the downstream position of the first separation tank 24. It is connected.

In the above-mentioned first separation tank 24, a partition plate 24c is erected at a position where the water storage area of the tank is divided into left and right parts to form two separation tanks 24a and 24b in a divided manner. Section and the lower wall surface of the oil recovery tank 10 described above are connected by a recovery passage 27, and the lower water storage area of the separation tank 24a is connected to
Each of the separation plates 24d ... Is obliquely provided at a predetermined equal interval. A net-shaped oil separation screen 28 is stretched between the separation tank 24a of the first separation tank 24 and the separation tank 25a of the second separation tank 25 described later, and the separation tank 24a of the first separation tank 24 is also provided. The lower end of the oil separation screen 28 is dipped in the tap water M stored on the side, and flows down between the upper end of the oil separation screen 28 and the upper water storage region of the separation tank 25a constituting the second separation tank 25. The plate 29 is obliquely installed.

That is, the tap water M temporarily stored in the oil recovery tank 10 flows out from the recovery passage 27 and is supplied into the separation tank 24a of the first separation tank 24. At the same time, the oil separating screen 28 is circulated in the scooping direction, and the oil L having a low specific gravity floating in the oil floating region of the separation tank 24 a is fed to the oil separating screen 2.
While picking up on 8, pick up one by one. The oil component L adhering to the oil separation screen 28 is fed down into the separation tank 25a of the second separation tank 25 via the downflow plate 29.

In addition, tap water M having a high specific gravity is dropped into the water storage region below the separation tank 24a, and the fine oil component L emulsified in the tap water M is sequentially attached to each separation plate 24d ... The oil components L are combined with each other and floated in the oil floating region. At the same time, the tap water M having a high specific gravity that drops in the lower reservoir area of the separation tank 24a overflows from the separation tank 24b side to form the third separation tank 26.
6a are sequentially supplied.

In the above-mentioned second separation tank 25, a partition plate 25c is erected at a position where the water storage area of the same tank is divided into left and right to form two separation tanks 25a and 25b in a divided manner, and an oil floating area of the separation tank 25a. Connect the drain passage 30 to the upper wall surface corresponding to
A return passage 31 connects the upper wall surface of the separation tank 25b corresponding to the upper water storage region and the upper opening of the separation tank 24a constituting the first separation tank 24 described above. That is, the separation tank 2
The oil L having a low specific gravity floating in the oil floating area of 5a is discharged from the drainage passage 30, and the tap water M having a high specific gravity falling to the lower water storage area of the tank is overflowed from the return passage 31 of the separation tank 25b, Separation tank 24 that constitutes the first separation tank 24
supply to A.

The above-mentioned third separation tank 26 has two partition plates 26c and 26d at positions where the water storage area of the third separation tank 26 is divided into left and right.
To separate and form the separation tanks 26a and 26b, and the upper wall surface and the lower wall surface of the separation tank 26a are connected by a circulation path 34 via a circulation pump 32 and a commercially available oil water separator 33. An oil discharge passage 33a is connected to a lower wall surface corresponding to the oil separation area 33. In addition, the circulation passage 36 is connected to the bottom wall surface of the separation tank 26b via the electromagnetic valve 35, and the circulation passage 3 is connected to the lower wall surface of the first cleaning tank 2 described above via the electromagnetic valve 37.
8 is connected, and the circulation paths 36 and 38 are connected to the oil cleaning nozzle 8 and the water surface cleaning nozzle 9 through the circulation pump 39, the filter 40, and the electromagnetic valves 41 and 42, respectively. There is.

That is, the circulation pump 32 is driven to continuously supply the tap water M stored in the upper water storage area of the separation tank 26a to the oil / water separator 33, and the tap water M is fed by the oil / water separator 33.
A minute amount of oil L emulsified therein is separated and discharged from the oil discharge passage 33a. In addition, the tap water M cleaned and filtered by the oil / water separator 33 is circulated and supplied to the lower water storage region of the separation tank 26a.

At the same time, the circulation pump 39 is driven to drive the first
The tap water M stored in the cleaning tank 2 and the third separation tank 26 is supplied to the oil cleaning nozzle 8 and the water surface cleaning nozzle 9, respectively, and the tap water M discharged from the oil cleaning nozzle 8 causes the oil content L adhering to the workpiece W. Are removed by washing. Moreover, the tap water M discharged from the water surface cleaning nozzle 9 causes the oil component L floating on the water surface portion of the first cleaning tank 2 to overflow toward the oil recovery tank 10 side.

Assuming that the illustrated embodiment is configured as described above, a method of cleaning the work W by the work cleaning device 1 will be described below. First, as shown in FIG. 1, after moving the unwashed work W to the shower washing position of the first washing tank 2, the circulation pump 39 is driven to supply the clean tap water M discharged from the oil washing nozzle 8. The work W is sprayed and shower-washed, and the oily oil component L attached to the work W is washed and removed. After that, the whole work W is immersed in the tap water M stored in the first cleaning tank 2, and the ultrasonic transducer 1 arranged in the same tank
5 is vibrated to ultrasonically clean the work W. Alternatively, the work W may be cleaned by either one of the shower cleaning and the ultrasonic cleaning.

At the same time, the tap water M discharged from the water surface cleaning nozzle 9 causes the oil L floating on the water surface of the first cleaning tank 2 to overflow into the oil recovery tank 10, and the oil recovery tank 10
The tap water M temporarily stored in the tank 2 flows out from the recovery passage 27 and is sequentially supplied to the first separation tank 24, the second separation tank 25, and the third separation tank 26 that constitute the oil-water separator 6. Each tank 2
4, 25, and 26, the oily oil component L emulsified in the tap water M is separated and collected, and the tap water M is purified and filtered.
Is circulated and supplied to the oil cleaning nozzle 8 and the water surface cleaning nozzle 9, respectively.

Next, the entire work W is immersed in the clean alkaline solvent Y stored in the second cleaning tank 3 to obtain the work W.
The fine oil content L remaining on is removed by washing. Alternatively, the work W is ultrasonically cleaned by vibrating the ultrasonic transducer 11 arranged in the same tank. At this time, the circulation pump 12 is driven,
The alkaline solvent Y stored in the second cleaning tank 3 is circulated and supplied while being cleanly filtered by the filter 13. Since the cleaning power of the alkaline solvent Y gradually decreases, it is replaced with a new alkaline solvent Y when the cleaning power becomes lower than the predetermined cleaning power.

Next, the entire work W is immersed in the clean tap water M stored in the third cleaning tank 4, and the ultrasonic vibrator 15 disposed in the same tank is vibrated to ultrasonically wave the work W. To wash. At the same time, the circulation pump 16 is driven to drive the third cleaning tank 4
The tap water M stored in is circulated and supplied while being cleanly filtered by the filter 17.

Next, after stopping the movement of the work W to the shower cleaning position of the fourth cleaning tank 5, the pressure feed pump 21 is driven to clean pure water G discharged from the left and right pure water cleaning nozzles 19, 19. After spraying on the work W and shower washing,
The washed work W is heated to a proper temperature with steam or the like and heated and dried.

As described above, after the oily oil L attached to the unwashed work W is washed and removed with the tap water M in advance, the second
Since the whole work W is immersed in the alkaline solvent Y stored in the cleaning tank 3 for cleaning, the amount of oil dissolved in the alkaline solvent Y is greatly reduced, and the cleaning power of the alkaline solvent Y is reduced in a short period of time. It is possible to prevent the deterioration and to obtain the detergency of the alkaline solvent Y stably for a long period of time. Moreover, since the oil component L is emulsified in the tap water M used for the cleaning process of the work W, compared with the conventional method in which the oil component L dissolved in the alkaline solvent Y is separated and recovered, It is extremely easy to separate and collect the oil component L emulsified in the water M, and the tap water M and the oil component L can be reliably separated by the commercially available oil water separator 33, and the separation efficiency of the oil component L can be improved.

In the correspondence between the constitution of the present invention and the above embodiment, the solvent of the present invention is the alkaline solvent Y of the embodiment.
In the same manner as above, the workpiece dipping tank is the second cleaning tank 3
The pre-cleaning means corresponds to the ultrasonic vibrator 7 and the oil cleaning nozzle 8, the ultrasonic cleaning means corresponds to the ultrasonic vibrator 7, and the shower cleaning means corresponds to the oil cleaning nozzle 8. However, the present invention is not limited to the configurations of the above-described embodiments.

In the above-described embodiment, after the work W is shower-washed with the tap water M discharged from the oil washing nozzle 8, the work W is immersed in the tap water M stored in the first washing tank 2 and ultrasonic waves are applied. For cleaning, for example, the uncleaned work W may be subjected to shower cleaning or ultrasonic cleaning, and then immersed in the alkaline solvent Y stored in the second cleaning tank 3 to be cleaned.
A cleaning method can be selected according to the work W.

[Brief description of drawings]

FIG. 1 is a piping system diagram of each tank constituting the work cleaning device.

[Explanation of symbols]

 G ... Pure water L ... Oil M ... Tap water W ... Work Y ... Alkaline solvent 1 ... Work cleaning device 2 ... First cleaning tank 3 ... Second cleaning tank 6 ... Oil / water separator 7 ... Ultrasonic transducer 8 ... Oil cleaning nozzle

Claims (4)

[Claims] 1. A work cleaning apparatus comprising a preliminary cleaning means for cleaning an uncleaned work with tap water in front of a work dipping tank in which an uncleaned work is immersed in a solvent for cleaning. 2. A work cleaning apparatus, which comprises a shower cleaning means for spraying tap water onto the work before a work dipping tank in which the uncleaned work is immersed in a solvent for cleaning. 3. A work cleaning device comprising an ultrasonic cleaning means for immersing an uncleaned work in a solvent and cleaning the work by immersing the work in tap water and ultrasonically cleaning the work. 4. A shower cleaning means for spraying tap water onto the work before the work dipping tank in which the unwashed work is immersed in a solvent for cleaning treatment, and the work is immersed in tap water. And an ultrasonic cleaning means for ultrasonic cleaning.