JPH07116614A - Cleaning device - Google Patents

Abstract

PURPOSE:To prevent the deterioration of cleaning liquids due to the mixture of the liquid, and improve the cleaning accuracy by means of a jet cleaning device which carries works continuously by belt conveyors and uses the cleaning liquids of different kinds. CONSTITUTION:The cleaning process of a cleaning device comprises hot water cleaning, detergent cleaning, rinsing and drying, the cleaning is effected by applying jets of cleaning liquids 2 and 32 and the cleaning device is provided with two separated belt conveyors 13 and 43 for carrying works 98 to prevent the carrying out/in of the cleaning liquids 2 and 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface treatment for removing deposits such as machine oil, cutting chips, sludge, and release material attached to parts during machining, and a washing liquid is jetted from a nozzle and conveyed by a conveyor. The present invention relates to a cleaning device suitable for continuous cleaning.

[0002]

2. Description of the Related Art Generally, industrial parts (hereinafter referred to as "workpieces")
For cleaning the above, a solvent such as trichloroethane or freon has been mainly used for cleaning.

The above substances have a high cleaning function, and the drying of the solvent is completed in a short time, so that they have been used as ideal detergents. On the other hand, the destruction of the ozone layer legally deteriorates the global environment. Came to be regulated by.

For this reason, various detergents and cleaning means to be used in place of this have been studied, but in order to clean a large amount of a contaminated work mainly composed of a large amount of oil after machining and continuously with high precision. The most promising is a cleaning device that combines a shower-type or spray-type cleaning device in which a pressurized cleaning liquid is jetted by a conveyer means of a conveyor and a nozzle and a drying device that blows hot air.

As a conventional example of the above function, Japanese Patent Application Laid-Open No. 2-359 has been proposed.
As disclosed in Japanese Patent Publication No. 79, a conveyor constituted by a conveyor conveyer continuous from an inlet to an outlet, a shower group, an air blow dryer and the like have been used.

[0006]

The above-mentioned conventional techniques have the following problems mainly due to the fact that the chain conveyor for transporting is continuous from the inlet to the outlet of the cleaning device. It was hard to say that the cost, maintenance cost, maintenance, etc. were sufficient.

(1) There is no rinsing function by the washing and washing liquid, and problems such as detergent stains after drying, metal corrosion, and stickiness occur.

(2) The conveyor chain continuously moves between each cleaning step, and there is no air-blowing device for the cleaning solution after each cleaning step. Therefore, the cleaning solution adhering to the chain is taken out. However, the liquid in each tank mixes, impairing the intended function of the washing liquid.

Particularly, when the shower tank in the final step is contaminated, the cleaning accuracy is significantly deteriorated.

(3) In order to prevent cleaning contamination due to the above item (2), a large number of electric cleaning machines are attached to each tank in the known technique. It has no function, is invalid in this regard, and leads to an increase in equipment costs.

(4) When the detergent liquid of another tank enters the first cleaning tank, the oil separated from the work does not float and becomes micelles, which causes filter clogging.

(5) The conveyor chain with the washing liquid is heated in the drying device, and the washing liquid evaporates, causing the following problems.

[0013] The chain is seized by accidental cleaning, etc.
If the driving friction of the conveyor is increased, the electric motor will be overloaded and the conveyor will be stopped.

The heat of vaporization of the washing liquid is generated, the extra energy consumed by the drying device is increased, and environmental pollution is caused by the washing liquid vapor.

Due to the filling of steam in the drying device and the decrease in temperature, the drying speed is lowered and the dry finish is liable to be insufficient.

(6) With the mixing of the washing liquids in each tank, it is necessary to frequently exchange all the washing liquids, and this formulation easily leads to environmental pollution.

The present invention is to eliminate the above problems.

[0018]

[Means for Solving the Problems] In a cleaning device in which a work is continuously conveyed by a belt conveyor, and a cleaning liquid is sprayed toward the work by a pressure pump, a spraying liquid nozzle is provided in a vertical direction of the work. There are multiple groups, and multiple groups of this liquid nozzle are arranged.The same liquid nozzle group ejects the same washing liquid and the plural types of washing liquid in the entire device, and a belt conveyor is required between the liquid nozzle groups. According to the above, the work is conveyed by dividing it.

[0019]

The operation of the cleaning apparatus of the present invention is such that the work is continuously conveyed by the belt conveyor, and the cleaning liquid is jetted toward the work by the pressure pump, and the same liquid nozzle group discharges the same cleaning liquid in the entire apparatus. Plural kinds of washing liquid are ejected, and the belt conveyor divides the liquid nozzle groups as needed to convey the work.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a rough cleaning tank for the first rough cleaning, which is filled with a cleaning liquid 2 and is composed of city water or an aqueous detergent liquid. Reference numeral 1-1 is an outer plate of the rough cleaning tank 1, and 1-2 is a partition which is divided into a main liquid tank 1-3 and an overflow tank 1-4. 3 is a filter for removing impurities and contaminants in the washing liquid 2, 4 is a circulation pump of the washing liquid 2, 5-1 to 5-3 are piping for circulation, 5-4
Is an opening connection to the upper part of the main liquid tank 1-3 at its return port to allow the washing liquid 2 to flow in the direction of the arrow returning to the upper part of the overflow tank 1-4. 6 is a heater, 7 is a temperature controller for controlling the washing liquid 2 at a constant temperature, 8 is a pressure pump for jetting the washing liquid 2, 9 is a liquid nozzle for jetting the washing liquid 2 pressurized by the pressure pump 8. , A plurality of workpieces 98 are arranged in the vertical direction. Reference numeral 10 is a pressure pipe connected to the rough cleaning tank 1, the pressure pump 8 and the liquid nozzle 9, and the cleaning liquid 2 flows from A ₁ to A ₂ and the intermediate pipe is omitted. Reference numeral 11 is a high-pressure air pipe, and high-pressure air is supplied by a compressor or a high-pressure vortex blower (both not shown), but this means is not particularly defined in the present invention.

Reference numeral 12 is an air nozzle for ejecting air.
A belt conveyor 13 is composed of a wire or a net at the belt portion so that the washing liquid 2 and air can pass therethrough with little resistance, and is separated from the conveyor for the next washing step. 14 is the washing liquid 2 ejected from the liquid nozzle 9.
For collecting and flowing the water into the main liquid tank 1-3 of the rough cleaning tank 1, 15 is a cabinet for forming a cleaning chamber, 16
Is a curtin that separates the cleaning / air-blowing space having another function, and is composed of a flexible thin film having slits in the longitudinal direction or a longitudinal thread-like aggregate. 17 is cabinet 1
A rough cleaning chamber partitioned by 5 and the cartin 16 and the like, 18 an exhaust collecting duct, 19 a damper circularly installed in the exhaust duct 18, 20 a mist blower attached to the exhaust collecting duct, and 21 a mist on the downstream side of the blower 20. Discharge pipe, 22
Is a waste liquid discharge port, and 23 is a waste oil discharge port. 31 is a finishing liquid tank for performing 2 times of finishing washing, and a washing liquid 32
The washing liquid 32 is generally a mixture of detergents, and the washing liquid 32 enhances the washing function in order to completely remove some unwashed unevenness in the washing in the previous step. 31-1 is a finish, an outer plate of the liquid tank 31, and 31-2 is a middle partition, whereby a main liquid tank 31-3 and an overflow tank 31-4 are separated. 33 is a filter for removing impurities and contaminants in the washing liquid 32, 34 is a circulation pump for the washing liquid 32, 35-1 to 35-3 are piping for circulation, 35-3
Reference numeral a is a return port thereof, which is opened and connected to the upper part of the main liquid tank 31-3 to allow the washing liquid 32 to flow in the direction of the arrow returning to the upper part of the overflow tank 31-4. 36 is a heater, 37
Is a temperature controller for the washing liquid 32, 38 is a pressurizing pump for jetting the washing liquid 32, 39 is a liquid nozzle, and a plurality of liquid pumps are arranged in the vertical direction of the work. It is more effective to use a plurality of liquid nozzles 39 than the liquid nozzle 9 in the previous step for improving the cleaning function. 40 is a washing tank 31,
With a pressure pipe connected to the pressure pump 38 and the liquid nozzle 39,
The washing liquid 32 flows from B ₁ to B ₂ and the piping is omitted.
Reference numeral 41 is a high-pressure air pipe, and the air source is the same as in the previous step. 42 is an air nozzle for ejecting air, and 43 is a belt conveyor having the same functional configuration as the belt conveyor 13 in the previous step. 49 is a gutter of the washing liquid 32, and 45 is a finishing washing chamber which is partitioned by the cabinet 15 and the curtin 16.

Next, FIG. 2 connected to the apparatus of FIG. 1 described above.
The explanation is as follows.

Reference numeral 51 denotes 1 for the first rinse cleaning.
In the next rinse tank, fill the inside with the washing liquid 52,
May be mixed with city water or pure water and a rust preventive agent or the like. Reference numeral 51-1 is an outer plate of the primary rinse tank 51, and reference numeral 51-2 is this partition, which separates the main liquid tank 51-3 and the overflow tank 51-4. The main function of the tank divided into two is the same as that of the tanks 1 and 31 in the previous step. 53 is a heater, 54 is a temperature controller, 55 is a pressurizing pump for jetting the washing liquid 52, and 56 is a liquid nozzle, and a plurality of liquid pumps are arranged in the vertical direction of the workpiece 98. Since the liquid nozzle 56 is intended for the rinsing function, it may have a weaker function than the cleaning liquid nozzle 39. Even if the number of the liquid nozzles 56 is smaller than that of the liquid nozzles 39, it is sufficiently effective. 57 is the primary rinse tank 51,
In the pressure piping connected to the pressure pump 55 and the liquid nozzle 56, the washing liquid 52 flows from C ₁ to C ₂ and the middle piping is omitted. 5
Reference numeral 8 is a high-pressure air pipe, and the air source is the same as in the previous step.
Reference numeral 59 is an air nozzle for ejecting air, 60 is a belt conveyor, and the functional configuration is the belt conveyor 13 in the previous step.
Is the same as Reference numeral 61 is a gutter of the washing liquid 52, 62 is a primary rinsing chamber partitioned by the cabinet 15 and the curtin 16, and 6
3 is a drain pipe.

Reference numeral 71 is 2 for cleaning the second rinse.
In the next rinse tank, fill the inside with the washing liquid 72,
In some cases, city water or pure water may be mixed with a rust preventive agent, etc., and in general, the basic liquid is often the same as the washing liquid 52 in the previous step, except that the contamination ratio is different. 71-1 is an outer plate of the secondary rinse tank 71, and 71-2 is this partition, which separates the main liquid tank 71-3 and the overflow tank 71-4. Regarding the main function of the tank divided into two, the tank 51 of the previous process
Is the same as. 73 is a heater, 74 is a temperature controller, and 75
Is a pressure pump for spraying the washing liquid 72, and 76 is a liquid nozzle.
As in the previous step, a plurality of them are arranged and configured. Reference numeral 77 denotes a pressure pipe connected to the secondary rinse tank 71, the pressure pump 75, and the liquid nozzle 76, and the washing liquid 72 flows from D ₁ to D ₂ and the middle pipe is omitted. Reference numeral 78 is a high-pressure air pipe, and the air source is the same as in the previous step. 79 is an air nozzle for ejecting air, 80
Is a belt conveyor and its functional configuration is the same as that of the belt conveyor 13 in the previous step. Reference numeral 81 is a gutter of the washing liquid 72, and reference numeral 82 is a secondary rinse chamber partitioned by the cabinet 15 and the curtin 16. Reference numeral 83 is a deionizing device for supplying water to the secondary rinse tank 71, and 84 is a pipe connecting the primary rinse tank 51 and the secondary rinse tank 71 to the overflow portion of the washing liquid 72 in the secondary rinse tank 71 to the primary rinse tank 51. Inflow.

90 is a drying oven, 91 is a drying oven cabinet, 92 is a heater for the oven, 93 is a hot air blower, 94 is a resistance plate for uniformly blowing hot air, 95-1 to 95-3 are hot air ducts, and hot air is an arrow. Circulate in the direction of. Reference numeral 96 is a belt conveyor, and the functional configuration is the belt conveyor 13 in the previous process.
It has the same specifications as. Reference numeral 97 is a hot air temperature controller, and 98 is a work. 99-1 is a belt conveyor on the inlet side of the washing machine,
99-2 is a belt conveyor on the outlet side of the washing machine, 99-3
Is a roller provided between the conveyors to facilitate peeling of the work 98.

Next, the operation of the above configuration will be described.

In order to perform cleaning with the hanging device, the rough cleaning tank 1
After filling the cleaning liquid 2 in the first cleaning bath 31, the cleaning liquid 32 in the final cleaning bath 31, and the cleaning liquids 5 and 72 in the primary rinse tank 51 and the secondary rinse tank 71 through the pure water device 83, the heaters 6, 36, 53, 73
And the temperature controllers 7, 37, 54 and 74 heat the respective washing liquids to the target temperature.

At the same time, the furnace heater 92 is energized to the hot air blower, and the hot air temperature controller 97 heats the drying furnace 90 to a constant temperature. It is effective to set the inner temperature controller 7 higher than the other control temperatures.

Further, the circulation pumps 4.34 are operated to circulate the washing liquid 2.32 through the filters 3.33, and then the pressurizing pumps 3.33, 55.75 are operated, and the liquid nozzles 9. Each washing liquid is jetted from 39, 56, and 76, and high-pressure air is sent to the air nozzles 12, 42, 59, 79 to jet the air.

Further belt conveyors 13, 43, 60
-Drive 80/96 to rotate the mist blower 20.

After the above cleaning preparation operation is performed, the workpiece 98 machined by the belt conveyor 99-3 and having oil, smut dust and the like attached thereto is conveyed, and first the belt conveyor 13 moves the inside of the rough cleaning chamber 17. Let

Here, the work 98 is first provided with a shower of high-temperature hot water evenly from above and below by means of the group of liquid nozzles 9 so that the adhered matter has a low viscosity due to thermal energy and is further washed with the physical energy of the high-pressure shower to remove most of the dirt. To be removed. Therefore, it is effective to set the hot water temperature as high as possible.

The washing liquid 2 containing this contaminant returns to the main liquid tank 1-3 through the gutter 14. Here, when the washing liquid 2 is water, the oil content mixed in the shower is easily separated from the water content and the oil content due to the specific gravity, and the oil content floats. This floating oil is collected by the circulation pump 4
The wash liquid 2 flowing out from the return port 5-4 flows into the overflow chamber 1-4, and the oil is accumulated in the upper part and the water and dust enter the filter 3 from the lower part to remove the dust, and the main liquid tank 1 is purified. Cycle back to -3. The purified cleaning liquid 2 is pressurized by the pressure pump 3 and the cleaning sprayed from the liquid nozzle 9 is repeated.

On the other hand, the oil accumulated in the upper portion of the overflow chamber 1-4 is extracted from the waste oil discharge port 23 at appropriate times.

The wet work 98 provided with the shower by the washing liquid 2 is then blown by the air nozzle 12 so that most of the washing liquid 2 is blown off, and a small amount of the washing liquid 2 is attached.

Further, the flow rate of the small-sized washing liquid 2 scattered in the rough washing chamber 17 by the shower and the air blow is adjusted by the damper 19, and the exhaust collecting duct 20 by the mist blower 20.
The washing liquid 2 of small particles, which is scattered and floated by the mist discharge pipe 21 through the above, does not adhere again.

Further, the curtin 16 prevents the small-sized washing liquid 2 and the washing liquid 32 in the adjacent chamber from directly mixing with each other.

At the same time, since the belt conveyor 13 is constructed independently, neither the washing liquid 2 is brought out nor the washing liquid 32 is brought in via the belt portion. As a result, the washing liquid 2 can have a long life without being mixed with the washing liquid of another tank having different seed heat, and the deterioration of the oil / water separation function due to the mixing of the washing liquid 32 can be prevented.

Next, the work 98 passes through the curtin 16 on the roller 99-3 and enters the finish cleaning chamber 45 in the adjacent chamber, and is moved by the belt conveyor 43 in this.

Here, the work 98 is shower-washed by the washing liquid 32 pressurized by the pressure pump 33 being jetted from the liquid nozzle 39. Here, most of the reserve of the work 98 has been removed by the previous washing with hot water, but in the case where there is a minute gap, a corner of the threaded portion, etc., some dirt may remain.

In this case, if the washing liquid 32 is mixed with a detergent, the washing function of the shower is improved and it can be completely removed.

In the case of the work 98 which is more difficult to clean, the number of liquid nozzles 39 is increased to further enhance the cleaning ability.

Here, the washing liquid 32 containing dirt returns to the main liquid tank 31-3 through the gutter 44, but most of the dirt such as oil is washed in the previous step, and a very small amount of dirt is washed 32. Since it is only mixed in the washing liquid 32, even if the washing liquid 32 is a detergent liquid, it becomes micelle,
Since the reaction amount of the fatty acid soda salt or the like is small, the washing liquid 32 is hardly deteriorated and the washing ability is not impaired.

The function of purifying the washing liquid 32 by the filter 33, the circulation pump 34, and the overflow tank 31-4 is almost the same as that of the above-mentioned washing step, and therefore its explanation is omitted.

Thereafter, the work 98 blows off the washing liquid 32 by the air nozzle 59, and conveys the washing liquid 32 on the workpiece 98 to the next primary rinsing chamber 62 with a very small amount.

Further, the belt conveyor 43 is constructed independently, the curtin 16 is partitioned from the primary rinse chamber 62, the mist of the washing liquid 32 is discharged, and the same functions as in the previous step are performed. Yes, wash solution 3 in primary rinse chamber 62
Never bring two.

The workpiece 98 that has entered the primary rinse chamber 62 is
The washing liquid 52 pressurized by the pressure pump 53 is the liquid nozzle 5
6 is sprayed, and a very small amount of the washing liquid 32 attached in the previous step is rinsed with a shower to wash off the washing liquid 32. The cleaning liquid 52 contains a very small amount of the cleaning liquid 32 because the cleaning liquid 32 is not brought in by the belt conveyor 43 in the previous process.
The washing liquid 72 of the secondary rinse that flows down into the main liquid tank 51-3 through 1 continuously flows into the main liquid tank 51-3, whereby a very small amount of the washing liquid 32 is further diluted and becomes extremely low. The washing liquid 52 containing the washing liquid 32 of the concentration is formed, and the overflow tank 51-
It is made to flow out from the drainage pipe 63 in the lower part of 4. Since this waste water contains only a very small amount of the washing liquid 32, it can be kept below the standard of the Water Pollution Control Law and the waste water treatment device can be omitted.

Further, the work 98 is air-blown by the air nozzle 59, and a very small amount of the washing liquid 52 is attached and conveyed to the secondary rinse chamber 82.

In this case as well, since the belt conveyor 60 is independent, the amount of the washing liquid 52 carried in is extremely small and the concentration of the washing liquid 52 is low as described above. There is almost no carry-in, and there is continuous deionization equipment 8
The washing liquid 72, which is always diluted with pure water supplied from No. 3, can be almost equal to the inflowing pure water. Since the work 98 is shower-washed with the clean wash liquid 72, the work 98 can be subjected to precision mirror-like washing without any stain. The shower function is the same as in the previous step, and the description is omitted.

Next, the work 98 is conveyed to the next drying furnace 90 by performing the last air blow by the air nozzle 79 and only adhering a very small amount of the washing liquid 72.

Since the belt conveyor 96 of the drying furnace 90 is separated from the belt conveyor 80 of the previous process, the belt conveyor 96 is always operated in a dry state, and therefore the generated steam has a very small amount of washing adhering to the work 98. Liquid 72
In addition, the load on the furnace heater 92 is reduced and the increase in humidity is small, and the work 98 can be dried with high accuracy by promoting the drying efficiency. Further, the belt conveyor 96 is always kept clean and maintenance is easy.

Although the above-described one embodiment of the present invention is a four-step shower system, rough cleaning may be omitted or the number of rinsing steps may be changed depending on the degree of cleaning accuracy and the shape and configuration of the work. The basic effect of the present invention can be constructed without changing.

[0054]

As described above, according to the cleaning apparatus of the present invention,
High-precision washing can be carried out continuously and in large quantities, and the deterioration of each washing liquid caused by carrying out the washing liquid by the belt conveyor is small, and the life can be extended.

Further, the drying efficiency is improved, energy saving can be achieved, and the pollution of waste water is small and the pollution can be prevented. Furthermore, it was possible to provide a useful cleaning device such as cost reduction by omitting an electric purifier or the like.

[Brief description of drawings]

FIG. 1 is a front configuration diagram of a cleaning device showing an embodiment of the present invention.

2 is a configuration diagram of a cleaning device showing an embodiment of the present invention, and is a rear configuration diagram of the cleaning device connected to FIG. 1. FIG.

[Explanation of symbols]

 1 Rough Cleaning Tank 2 Washing Liquid 8 Pressurizing Pump 9 Liquid Nozzle 12 Air Nozzle 13 Belt Conveyor 18 Exhaust Collecting Duct 20 Mist Blower 31 Finishing Liquid Tank 32 Washing Liquid 38 Pressure Pump 39 Liquid Nozzle 42 Belt Conveyor 51 Primary Rinse Tank 52 Washing Liquid 55 Pressurizing Pump 56 Liquid Nozzle 59 Air Nozzle 60 Belt Conveyor 71 Secondary Rinse Tank 72 Washing Liquid 75 Pressurizing Pump 76 Liquid Nozzle 79 Air Nozzle 80 Belt Conveyor 90 Drying Furnace 92 Furnace Heater 93 Hot Air Blower 96 Belt Conveyor 98 Workpiece

Claims (4)

[Claims] 1. A workpiece (98) is attached to a belt conveyor (1).
3, 43, 60, 80, 96) and continuously conveys to the work (98) by a pressure pump (8, 38, 55.7).
In the cleaning device for spraying the cleaning liquid (2, 32, 52, 72) by means of 5), the liquid nozzle (9.
39.56.76) are formed in a plurality of groups in the vertical direction of the work (98), and a plurality of groups of this liquid nozzle (9.39.56.76) are arranged to form the same liquid nozzle (9.39.56).・ 7
6) The group ejects the same washing liquid, and the washing liquid of a plurality of types in the entire device, and the belt conveyor (13.43.60.80).
Reference numeral 96) is a cleaning device characterized in that the work (98) is conveyed by dividing the liquid nozzles (9, 39, 56, 76) groups as needed. 2. A belt conveyor (13.43.60.80.) By disposing an air nozzle (12.42.59.79) group in the next process of the liquid nozzle (9.39.56.76) group.
2. The cleaning device according to claim 1, wherein the dividing position of 96) is located between the air nozzle and the liquid nozzle in the next step. 3. A work (98) is conveyed into a drying furnace (90) for drying after cleaning and air blow by jetting a washing liquid (2, 32, 52, 72), and this drying furnace (9) is dried.
2. The cleaning device according to claim 1, wherein the belt conveyor (96) in 0) is formed by dividing the belt at the inlet of the drying furnace (90) in the belt conveyor of the previous step. 4. The washing liquid (2, 32, 52, 72) is used for detergent and rinsing, and in particular, the detergent washing is a concentration-changing washing liquid, and the rinsing is a washing liquid of two or more kinds including city water pure water. The cleaning apparatus according to claim 1, wherein the cleaning is performed by combining seeds.