JPH08318233A - Vacuum washing and drying apparatus - Google Patents

Abstract

PURPOSE: To provide a vacuum washing and drying apparatus capable of safely and efficiently washing and drying a work. CONSTITUTION: A vacuum washing and drying apparatus is equipped with a lower immersion washing chamber 2 immersing a work in a washing soln. under reduced pressure, an upper steam washing and drying chamber 3 washing the work after immersion washing with steam under reduced pressure and drying the washed work and a lift stand 7 capable of being raised in pressure and dividing the immersion washing chamber 2 and the steam washing and drying chamber 3 at a time of rising.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum washing / drying apparatus for removing oils and fats in the fields of machining and heat treatment of metals.

[0002]

2. Description of the Related Art When removing oils and fats in the fields of machining and heat treatment of metals, shower cleaning using a hydrocarbon solvent and immersion cleaning are performed, and then the adhering solvent is vacuum dried. There is an apparatus as shown in FIG. 2, for example.

In FIG. 2, reference numeral 51 is an immersion cleaning chamber, 61 is a steam cleaning chamber, 71 is a vacuum drying chamber, and 81 is a workpiece to be cleaned. First, the shutter 52 is opened, the work 81 is stored in the immersion cleaning chamber 51, and the shutters 52, 53, 62, 7
2 is closed, the immersion cleaning chamber 51, the steam cleaning chamber 61, and the vacuum drying chamber 71 are closed, and the immersion cleaning chamber 51, the steam cleaning chamber 61, and the vacuum drying chamber 71 are closed by the vacuum pump 85 via the valves 82, 83, and 84. Reduce the pressure to about 100 Torr. After depressurizing, the work 81 is dipped in the lower hydrocarbon solvent 54, rocked and washed, and the work 81 is pulled up. At this time, a dirty solvent may adhere to the work 81.

Next, the shutter 53 is opened, the work 81 subjected to the immersion cleaning is transferred to the steam cleaning chamber, and the shutter 53 is closed.
The vapor cleaning chamber 61 is decompressed to about 100 Torr by the vacuum pump 85 via the valve 83. The hydrocarbon solvent 63 under the steam cleaning chamber 81 is heated by a heating device (not shown) to generate steam. Shutters 53, 62
A cooling pipe 65 is provided in the lower part of the, and a vapor layer 64 is formed between the solvent 63 and the cooling pipe 65.

Then, when the work 81 enters the vapor layer 64, the vapor adheres to the surface of the work at room temperature and is liquefied to clean the work 81 with steam. The remaining oil is dropped. This cleaning is performed until the work 81 reaches the steam temperature.
Then, the work 81 that has been steam-cleaned is pulled up. The steam cooled by the cooling pipe 65 is
It is collected in the tank 86 via.

Next, the shutter 62 is opened, the steam-cleaned work 81 is transferred to the vacuum drying chamber 71, the shutter 62 is closed, and the vacuum pump 85 is evacuated through the valve 84 to about 2 Torr. The work 81 is dried. After drying, air or nitrogen gas is put into the vacuum drying chamber 71 to restore the pressure, the shutter 72 is opened, and the work 81 is extracted.

When steam cleaning and drying are performed under reduced pressure using this hydrocarbon solvent, the temperature difference between the work and steam is relatively large, so the amount of condensate is large, and because of steam, small gaps and Enter the hole and wash the work well,
It also has the advantage that it can be washed uniformly. Furthermore, 10
Since it is used under a reduced pressure of 0 Torr or less, it does not come into contact with fire and has an advantage that the risk of ignition and combustion is extremely small under such a reduced pressure.

[0008]

However, in the above cleaning apparatus, the immersion cleaning chamber 51, the steam cleaning chamber 61, and the vacuum drying chamber 71 are provided, and the transfer device for moving the work 81 horizontally and vertically is provided. However, there is a problem in that the entire device becomes large and plural.

[0009]

In order to solve the above problems, a vacuum cleaning / drying apparatus according to the first aspect of the present invention includes a dipping cleaning chamber in which a work is immersed in a cleaning liquid under reduced pressure for immersion cleaning, and an upper part in which the work is immersed. The work after the immersion cleaning is provided with a steam cleaning / drying chamber for performing steam cleaning under reduced pressure and further drying, and an elevating table that can move up and down and divides the immersion cleaning chamber and the steam cleaning / drying chamber when rising. .

Further, in the second aspect of the present invention, the elevating table is an elevating table on which the work is placed, and in the third aspect of the invention, a heat insulating table is interposed between the elevating table and the work. It is a thing.

In the fourth invention, the upper part of the lifting table has a first step, the central part of the immersion cleaning chamber is opened, and the insulating part is engaged with the first step. It is equipped with a step.

Further, in the fifth aspect of the present invention, a distiller for distilling and regenerating the cleaning liquid stored in the immersion cleaning chamber and the steam cleaning / drying chamber is provided.

Further, according to the sixth aspect of the invention, a valve is provided which opens the cleaning steam regenerated by the distiller at the time of steam cleaning, and a shower nozzle provided in the steam cleaning / drying chamber for ejecting the cleaning steam. Is.

[0014]

According to the first aspect of the present invention, the work is cleaned in the lower immersion cleaning chamber with the cleaning liquid under reduced pressure, and after the cleaning, the elevating table is moved up to the immersion cleaning chamber and the steam cleaning / drying chamber. To separate the steam cleaning and drying room into a small room with a small capacity.
Therefore, cleaning can be performed effectively and reliably during steam cleaning, and decompression can be performed in a short time.

According to the second aspect of the present invention, since the work is placed on the lift table, the cleaning liquid is surely applied to the work during the steam cleaning, and the steam cleaning is effectively performed. Further, the work is dried in a short time. Further, according to the third aspect of the present invention, the heat insulating table provided between the lifting table and the work allows the work to be warmed only by the cleaning steam without receiving heat from the lifting table warmed by the cleaning steam. Therefore, it can be effectively cleaned with the cleaning liquid for dew condensation caused by the difference between the steam temperature and the work temperature.

Further, according to the fourth aspect of the present invention, since the first step of the elevating table and the second step of the immersion cleaning chamber are engaged with each other, the immersion cleaning chamber and the steam cleaning / drying chamber are surely divided. . Also,
When the O-rings are provided on the first step and the second step, both chambers are sealed and reliably divided.

Further, according to the fifth aspect of the invention, the cleaning liquid stored in the immersion cleaning chamber and the steam cleaning / drying chamber is taken out by the distilling machine and steam is regenerated.

According to the sixth aspect of the present invention, the cleaning steam regenerated by the distillation machine is sent to the steam cleaning / drying chamber through the shower nozzle, and the work is cleaned by steam.

[0019]

EXAMPLE An example of the present invention will be described below with reference to FIG.
In FIG. 1, reference numeral 1 denotes a vacuum cleaning / drying apparatus main body, which is provided with a cylindrical immersion cleaning chamber 2 in the lower portion and a steam cleaning / drying chamber 3 in the upper portion. Reference numeral 3a is a slide-type shutter that can be hermetically closed in the steam cleaning / drying chamber. 6 is a cleaning liquid stored in the immersion cleaning chamber 2, for example, a cleaning liquid of a petroleum-based combustible solvent, which can be supplied from the outside through a valve 34 and a water supply pipe 33. Reference numeral 4 denotes a workpiece to be cleaned, which is designed to be installed in the cleaning liquid by the transport mechanism. Reference numeral 7 denotes a lift table, which has one or a plurality of steps 7a and 7b at the top.
Reference numeral 8 denotes a heat insulating base placed on the lift base 7, and the work 4 is placed on the heat insulating base 8.

Reference numeral 11 denotes a ceiling of the immersion cleaning chamber, which has an opening portion 11c with an opening in the central portion, and the step 7 at the edge portion.
Steps 11a and 11b capable of engaging with a and 7b are provided. 12 and 13 are O provided on the steps 11a and 11b.
When the lifting platform 7 is raised to the ceiling 11 by the ring, the immersion cleaning chamber 2 and the steam cleaning / drying chamber are controlled by the steps 7a and 7b of the lifting platform 7, the O-rings 12 and 13, and the steps 11a and 11b of the ceiling. 3 is divided, and the immersion cleaning chamber 2 and the steam cleaning / drying chamber 3 are hermetically sealed.

Reference numeral 16 is an elevating mechanism for elevating the elevating table 7.
Reference numeral 7 is an elevating lift wire, and 18 is a stopper plate for fixing the tip of the elevating lift wire to the elevating table, and the elevating mechanism 16 moves up or down by movements such as rotation.

Reference numeral 21 is a distiller in which the cleaning liquid recovered from the immersion cleaning chamber 2 and the steam cleaning chamber 3 is heated by a heating device 22 and distilled to be regenerated, and 23 is a cooler for cooling the cleaning liquid of the distillation device 21. , And is returned to the immersion cleaning chamber 21 via the water supply pipe 24. The cleaning liquid for the distiller 21 has a valve 26 and a supply pipe 27.
Then, it is returned to the steam cleaning / drying chamber 3 via the shower nozzle 31. A heater 30 warms the steam cleaning / drying chamber.

Reference numeral 33 is a water supply pipe, and 34 is a valve provided for adding a new cleaning liquid from the outside when the cleaning liquid in the immersion cleaning chamber 2 is insufficient. 37 is an exhaust pipe,
A valve 38 and a vacuum pump 39 depressurize the steam cleaning / drying chamber 3. Reference numeral 36 is a drain pipe for collecting the cleaning liquid in the steam cleaning / drying chamber 3. An exhaust pipe 40 and a valve 41 are provided for decompressing the steam cleaning / drying chamber 3 and then restoring the pressure.

Reference numeral 42 is a drain pipe provided at the bottom of the immersion cleaning chamber 2, 43 is a valve, and 44 is a strainer. The dirty cleaning liquid in the immersion cleaning chamber 2 is collected and sent to a distiller for regeneration. 45 is a drainage pipe provided at the bottom of the immersion cleaning chamber 2, 4
Reference numeral 6 denotes a valve, which is provided to take out the waste liquid in the immersion cleaning chamber 2.

First, the valves 26, 34, 38, 41, 4
3 and 46 are closed, the shutter 3a is closed, and the immersion cleaning chamber 2 and the steam cleaning / drying chamber 3 are closed. Next valve 3
8, the vacuum pump 39 is used to reduce the pressure in the immersion cleaning chamber 2 and the steam cleaning / drying chamber 3, and the valve 34 is opened to inject the cleaning liquid into the immersion cleaning chamber 2 from the outside through the water supply pipe.
The valve 34 is closed. When the pressure in the immersion cleaning chamber 2 and the steam cleaning / drying chamber is reduced to 100 Torr, the elevating mechanism 16 is operated to elevate the elevating table 7, and when the elevating table 7 comes to the top of the immersion cleaning chamber 2, the elevating table 7 The steps 7a and 7b of the above are engaged with the steps 11a and 11b of the ceiling 11 of the immersion cleaning chamber 2, and the O-rings 12 and 13 allow the immersion cleaning chamber 2 and the steam cleaning / drying chamber 3
Are sealed and separated. Close valve 38 and valve 41
To open the steam cleaning / drying chamber 3 to the atmospheric pressure, and to open the valve 4
Close 1

After the pressure in the steam cleaning / drying chamber 3 is restored, the shutter 3a
Open and place the work 4 on the heat insulation base 8 on the lift base 7,
The shutter 3a is closed. At this time, the steam cleaning / drying chamber 3 and the shutter 3 a are closed by the O-ring 14. Since the pressure in the immersion cleaning chamber 2 is lower than that in the steam cleaning / drying chamber 3, the valve 38 is opened and the vacuum pump 39 is operated to reduce the pressure in the steam cleaning / drying chamber 3 to 100 Torr. The same pressure as the drying chamber 3 was applied to the valve 3
Close 8

Then, the elevating machine 16 lowers the elevating table 7 to immerse the work 4 in the cleaning liquid 6 for cleaning. When the immersion cleaning of the work 4 is completed, the elevating mechanism 16 is operated to raise the elevating table 7. At this time, the cleaning liquid 6
If the dirt is large, the dirty cleaning liquid may adhere to the work 4.

When the elevating table 7 rises and reaches the uppermost part of the immersion cleaning chamber 2, the steps 7a and 7b of the elevating table 7 and the steps 11a and 11b of the ceiling 11 of the immersion cleaning chamber 2 are engaged with each other, and the O-ring. 1
The immersion cleaning chamber 2 and the steam cleaning / drying chamber 3 are separated by 2 and 13, and both chambers are sealed.

Next, the valve 26 is opened, and the cleaning liquid regenerated by the distiller 21 and heated by the heater 22 is supplied to the steam cleaning / drying chamber 3 through the supply pipe 27 and the shower nozzle 31. At this time, since the pressure in the steam cleaning / drying chamber 3 is reduced to about 100 Torr, the cleaning liquid becomes vapor and is jetted and supplied.

The work 4 is cleaned at room temperature during immersion cleaning, and is at room temperature after steam cleaning. On the other hand, the steam ejected from the shower nozzle 31 is heated, and when the steam adheres to the work 4, the steam is liquefied due to the temperature difference between the two. The work 4 is cleaned with this liquefied cleaning liquid. This cleaning is performed until the work 4 reaches the steam temperature. The cleaned steam is stored in the lower part of the steam cleaning / drying chamber 3 and is recovered in the distillation chamber 21 via the drain pipe 36.

When the steam cleaning is completed, the valve 26 is closed, the heater 30 is operated to heat the steam cleaning / drying chamber 3, and the vacuum pump 39 depressurizes the steam cleaning / drying chamber 3 to several torr or less. By this pressure reduction and heating, the cleaning liquid attached to the work 4 is evaporated and the drying is rapidly performed.

When the work 4 is dried, the valve 38 is closed and the valve 41 is opened to restore the steam cleaning / drying chamber 3 to the atmospheric pressure. Then, the shutter 3a is opened and the work 4 is taken out from the steam cleaning / drying chamber 3.

When the first cleaning is completed, the cleaning liquid 6 is contained in the immersion cleaning chamber 2 and the upper portion of the immersion cleaning chamber 2 is depressurized to about 100 Torr.
Then, the work 4 to be washed next is placed on the heat insulating base 8 and the washing and drying may be performed in the same manner as described above.

The immersion cleaning chamber 2 and a small steam cleaning / drying chamber 3 provided above the immersion cleaning chamber 2 reduce the size of the cleaning / drying chamber. Further, since the work is performed only by the vertical movement, the transfer device can be downsized. Further, when the lift table 7 rises and reaches the uppermost part, the step of the lift table 7 engages with the step of the ceiling of the immersion cleaning chamber, and the steam cleaning / drying chamber 3 and the immersion cleaning chamber 2 are separated and hermetically sealed. Since the steam cleaning / drying chamber is downsized, and the pressure in both chambers is reduced, the steam of the cleaning liquid does not mix with air and does not explode. Further, since the work is placed on the heat insulating base, heat is not received from the elevating base heated during the steam cleaning, and the work is heated only by the steam, and the steam cleaning can be effectively used.

Further, in the above embodiment, the elevating table is hung by the elevating lift wire to rotate the elevating mechanism. However, it is also possible to attach a cylinder to the elevating table and elevate the elevating table by hydraulic pressure or air pressure. Further, a pipe line through which the cleaning liquid can circulate may be provided outside the lower part of the immersion cleaning chamber. In this case, the cleaning liquid can be circulated through the pipe when the lift table descends and rises, and the cleaning liquid can be made uniform.

[0036]

As described above, according to the first aspect of the present invention, the work is washed with the cleaning liquid under reduced pressure in the lower immersion cleaning chamber, and after the cleaning, the lift is raised to be immersed and cleaned by the lift. The chamber and the steam cleaning / drying chamber are divided, and the steam cleaning / drying chamber can be made into a small chamber having a small capacity, and decompression can be performed in a short time. According to the invention of claim 2,
Since the work is placed on the lifting table, the cleaning liquid is surely applied to the work during the steam cleaning, and the steam cleaning is effectively performed. Further, the work can be dried in a short time.

Further, according to the third aspect of the invention, the heat is not received from the lift table warmed by the cleaning steam by the heat insulating table provided between the lift table and the work, and only the cleaning steam is used. It is warmed and the cleaning liquid for condensation caused by the difference between the steam temperature and the work temperature is effectively cleaned.

Further, according to the invention of claim 4, the first step of the lift table and the second step of the immersion cleaning chamber are engaged with each other, so that the immersion cleaning chamber and the steam cleaning / drying chamber can be securely connected. Split,
Can be sealed.

According to the fifth aspect of the present invention, the cleaning liquid stored in the immersion cleaning chamber and the steam cleaning / drying chamber can be taken out by the distilling machine and steam can be regenerated.

According to the sixth aspect of the invention, the cleaning steam regenerated by the distillation machine can be sent to the steam cleaning / drying chamber through the shower nozzle to clean the work with steam.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of a vacuum cleaning / drying apparatus of the present invention.

FIG. 2 is a schematic configuration diagram of a conventional vacuum cleaning and drying apparatus.

[Explanation of symbols]

 1 Vacuum Cleaner / Dryer Main Unit 2 Immersion Cleaning Room 3 Steam Cleaning / Drying Room 3a Shutter 4 Workpiece 6 Cleaning Solution 7 Lifting Table 7a, 7b Step 8 Heat Insulation Table 11 Ceiling 11a, 11b Step 11c Opening 12, 13 , 14 O-ring 16 Lifting mechanism 17 Lifting lift wire 18 Stopper 21 Distiller 22 Heater 23 Cooler 24, 33 Water supply pipe 27 Supply pipe 30 Heater 31 Shower nozzle 26, 34, 38, 41, 43, 46 Valve 36, 42 , 45 Drain pipe 37, 40 Exhaust pipe 39 Vacuum pump 44 Strainer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsunori Ito 2-14-3 Awaji, Higashiyodogawa-ku, Osaka-shi, Osaka Sansha Electric Co., Ltd.

Claims (6)

[Claims] 1. A dip cleaning chamber in which a work is dipped in a cleaning liquid under reduced pressure for dipping and cleaning, and a steam cleaning / drying chamber in which the work after the dip cleaning is steam-cleaned under reduced pressure and further dried is formed in an upper part. A reduced pressure cleaning / drying apparatus comprising a lift table which can be moved up and down and divides the immersion cleaning chamber and the steam cleaning / drying chamber when rising. 2. The vacuum cleaning / drying apparatus according to claim 1, wherein the elevating table is an elevating table on which the work is placed. 3. The vacuum cleaning / drying device according to claim 2, wherein a heat insulating base is interposed between the elevating base and the work. 4. The method according to claim 1, wherein an upper part of the lifting table has a first step, and a central part of the immersion cleaning chamber is opened.
A reduced pressure cleaning / drying apparatus having a second step in which an insulating portion engages with the first step. 5. The vacuum cleaning / drying apparatus according to claim 1, comprising a distiller for distilling and regenerating the cleaning liquid stored in the immersion cleaning chamber and the steam cleaning / drying chamber. 6. The vacuum cleaning / drying according to claim 5, comprising a valve for opening the cleaning steam regenerated by the distiller during steam cleaning, and a shower nozzle provided in the steam cleaning / drying chamber for ejecting the cleaning steam. apparatus.