JP3248994B2 - Cleaning and drying equipment for parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning and drying parts and the like, and is attached to an object to be cleaned such as a part which has been subjected to machining such as cutting and pressing or quenching. The present invention relates to an apparatus that is washed and dried to remove cutting oil, quenching oil, and the like.

[0002]

2. Description of the Related Art In general, parts subjected to machining such as cutting and pressing are attached with cutting oil, and parts subjected to quenching treatment are attached with quenching oil. Before processing, it is necessary to completely remove the oil adhering to these parts.Conventionally, in order to remove these oils, detergents of synthetic solvents such as trichloroethylene, chlorofluorocarbon and ethane are generally used. Was.

[0003] Conventionally, drying of such an object to be cleaned after cleaning has been performed by hot air.

[0004] Conventionally, cleaning, rinsing and drying of this kind of parts have been performed by separate tank devices.

[0005]

In an apparatus using a conventional synthetic solvent detergent such as trichloroethylene, chlorofluorocarbon and ethane, the use of fluorocarbon and ethane has recently been banned due to environmental pollution. Underground pollution is strictly regulated.Water-based solvent detergents require a large amount of wastewater treatment equipment, and there are difficulties in rust prevention and drying, and there is a tendency to use hydrocarbon solvent detergents such as petroleum. There is.

Conventionally, since washing, rinsing, and drying are performed in individual tank devices, it is necessary to transfer the objects to be cleaned to the respective tank devices in order, resulting in poor work efficiency. There is a problem that each tank device must be installed individually, and a large installation area is required.

Further, in an apparatus for drying an object to be cleaned after cleaning with hot air, it is easy to remove the residual detergent in the overlapping portion of the small object to be cleaned or the residual detergent in the deep hole portion of the object to be cleaned. There is a problem that could not be done.

The present invention has been made in view of the above-mentioned problems, and the washing, rinsing, and drying can be sequentially performed in one washing and drying tank without any environmental pollution.
An object of the present invention is to provide an apparatus for cleaning and drying components and the like that can reduce an installation area and can greatly improve a finished state.

[0009]

According to a first aspect of the present invention, there is provided an apparatus for cleaning and drying parts and the like, comprising a cleaning and drying tank provided with an ultrasonic transmitter at a bottom portion for storing and drying an object to be cleaned, and a cleaning solution tank. A rinsing solution tank, and a liquid feed pipe connected to a pump for selectively supplying a solvent to the cleaning and drying tank from the cleaning solution tank and the rinsing solution tank;
A drain pipe for collecting the solvent in the washing / drying tank into the washing solution tank, a heating duct having a fan for ventilation and connected to the washing / drying tank, and a drain pipe connected to the washing / drying tank for connection. And an exhaust pipe connected between the washing and drying tank and the cooling duct and provided with a vacuum pump.

[0010] The apparatus for cleaning and drying parts and the like according to claim 2 is the apparatus for cleaning and drying parts and the like according to claim 1.
The washing solution tank and the rinsing solution tank are formed adjacent to each other via an overflow partition so that the solvent of the rinsing solution tank is made to be the washing solution tank. And the vacuum distillation machine was connected to a rinsing solution tank.

[0011]

In the washing and drying apparatus for parts and the like according to the first aspect, after the object to be washed is stored in the washing and drying tank, the solution in the washing solution tank is transferred to the washing and drying tank from a liquid feed pipe connected to the washing solution tank. The solvent is poured, and the solvent is refluxed in the washing solution tank while maintaining a predetermined level in the washing and drying tank. Then, the object to be cleaned in the cleaning / drying tank is cleaned by the operation of the ultrasonic transmitter. Subsequent to the washing step, the solvent in the washing and drying tank is discharged to the washing solution tank, and the rinsing step is performed.

In this rinsing step, the solution in the rinsing solution tank is poured into the washing and drying tank from a liquid feed pipe connected to the rinsing solution tank, and while maintaining the solvent at a predetermined level,
The ultrasonic transmitter is operated, and the object to be washed is rinsed in the washing and drying tank. During this rinsing, the solvent is continuously poured into the washing and drying tank, and the solvent is returned to the washing solution tank while maintaining the inside of the washing and drying tank at a predetermined liquid level. When the rinsing process is completed, the solvent in the washing / drying tank is discharged to the washing solution tank, and hot air drying is performed.

In the hot air drying, air heated in the heating duct is supplied to a cleaning / drying tank by a blower fan, and the heated air supplied to the cleaning / drying tank removes a solvent adhering to an object to be cleaned. The vaporized solvent is cooled by a cooling duct, cooled, condensed and liquefied, and collected in a cleaning solution tank.

After the completion of the hot air drying process, the vacuum pump is driven to suction through an exhaust pipe connected to the bottom of the washing / drying tank, thereby increasing the degree of vacuum in the washing / drying tank, and evaporating the residual solvent in the washing / drying tank. The vaporized solvent is collected in the cleaning solution tank cooled and condensed in the cooling duct. By the vacuum drying process, the solvent remaining in the gaps between the small articles to be cleaned stacked and stored or the solvent remaining in the deep holes and the like of the articles to be cleaned is recovered.

According to a second aspect of the present invention, there is provided an apparatus for cleaning and drying parts and the like according to the first aspect.
The solvent in the washing solution tank flows into the vacuum evaporator and is regenerated by operating the vacuum evaporator at all times or as needed, and the regenerated solvent is supplied to the rinsing solution tank and used for rinsing. The solvent exceeding a predetermined level in the solution tank flows into the cleaning solution tank over the overflow partition.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of a washing and drying apparatus for parts and the like according to the present invention will be described with reference to the drawings.

A washing / drying tank 1 for accommodating an object to be washed for washing, rinsing and drying, a washing solution tank 2 for a hydrocarbon solvent and a rinsing solution tank 3 are provided.

The washing solution tank 2 and the rinsing solution tank 3 are connected to pumps 6 through on-off valves 4 and 5, respectively.
Is connected to the liquid feed pipe 7 connected to the liquid supply pipe 7. The on-off valve 8, the cleaning solvent filter 9, and the check valve 10 are connected in series on the discharge side of the pump 6 of the liquid sending pipe 7, and the tip side of the liquid sending pipe 7 is connected to the washing and drying tank 1. I have. In addition, the on-off valve 8, the cleaning solvent filter 9 and the check valve 10
A liquid feed pipe 14 in which an on-off valve 11, a rinsing solvent filter 12 and a check valve 13 are connected in parallel is provided.

At the bottom of the washing and drying tank 1, an ultrasonic oscillator 15 for performing a washing action is provided.

Further, the washing and drying tank 1 is provided with a level sensor 16 for controlling the level of the solvent.

A drainage pipe 18 is connected to a drainage portion of the washing and drying tank 1 via an on-off valve 17, and a distal end of the drainage pipe 18 is connected to the washing solution tank 2. . The bottom of the washing solution tank 2 is connected to a vacuum evaporator 19 for solvent regeneration, and the vacuum evaporator 19 is connected to the rinsing solution tank 3. The washing solution tank 2 and the rinsing solution tank 3 are installed adjacent to each other via an overflow partition 20, and the solvent in the rinsing solution tank 3 falls into the washing solution tank 2 over the overflow partition 20. It is supposed to be.

The vacuum distilling machine 19 is operated at all times or as needed, so that the solvent in the washing solution tank 2 flows in and regenerates, and the regenerated solvent flows out to the rinsing solution tank 3. ing.

On one side of the washing and drying tank 1, a heating duct 21 is connected and opened. The heating duct 21 is provided with an opening / closing valve 22, a heat exchanger or heater 23 for heating, and a fan 24 for blowing. The intake side of the blower fan 24 of the heating duct 21 is open to the atmosphere.

Further, a cooling duct 25 is connected to the other side surface of the washing and drying tank 1 and communicates with the cooling duct 25. The cooling duct 25 has an on-off valve 26 and a cooler cooled by a refrigerant such as a refrigerator.
27 are sequentially connected, and a distal exhaust port 28 of the cooling duct 25 is open to the atmosphere. A drain pipe 29 communicating with the washing solution tank 2 is connected to an intermediate portion of the cooling duct 25 between the on-off valve 26 and the cooler 27.

An exhaust pipe 30 is provided at the bottom of the washing and drying tank 1.
An open / close valve 31 and a vacuum pump 32 are sequentially connected to the exhaust pipe 30, and the exhaust side of the vacuum pump 32 is connected between the open / close valve 26 and the cooler 27 of the cooling duct 25. I have.

Next, the operation of this embodiment will be described.

After storing the article 33 to be washed in the washing and drying tank 1,
Opening / closing valves 4 and 8 of liquid sending pipe 7 connected to washing solution tank 2
Is opened, and the pump 6 is driven. The solution in the washing solution tank 2 is sent to the solution sending pipe 7 under pressure, filtered by the washing solvent filter 9 and injected into the washing and drying tank 1. At this time, the on-off valve 11 is closed and the solvent does not flow toward the rinsing solvent filter 12 due to the check valve 13.

When the solvent is poured into the washing / drying tank 1 to a predetermined liquid level, the level sensor 16 detects that the solvent has been supplied to the predetermined liquid level, and activates the ultrasonic transmitter 15 to perform cleaning. The cleaning of the article 33 to be cleaned in the drying tank 1 is started. During this washing, the solvent is continuously injected into the washing / drying tank 1, and the level sensor 16 controls the opening / closing valve 17 of the drain pipe 18 so that a part of the solvent in the washing / drying tank 1 is discharged to the washing solution tank 2. Then, the solvent in the washing and drying tank 1 is maintained at a predetermined liquid level.

When the ultrasonic transmitter 15 is operated for a predetermined cleaning time, the ultrasonic transmitter 15 and the pump 6 stop operating to complete the cleaning process, and the on-off valves 4 and 8 of the liquid supply pipe 7 are closed. The on / off valve 17 for drainage is opened, and the solvent in the washing and drying tank 1 is discharged to the washing solution tank 2.

When this washing step is completed, the rinsing step is started. In this rinsing step, the on-off valves 5 and 11 of the liquid sending pipe 7 connected to the rinsing solution tank 3 are opened, the pump 6 is driven, and the solution in the rinsing solution tank 3 is pressure-fed to the liquid sending pipe 7. The mixture is filtered by a rinsing solvent filter 12 and injected into the washing and drying tank 1. At this time, the on-off valve 8
Is closed and the check valve 10 prevents the solvent from flowing to the cleaning solvent filter 9 side.

When the solvent is injected into the washing / drying tank 1 up to a predetermined liquid level, the level sensor 16 detects that the solvent has been supplied to the predetermined liquid level, and activates the ultrasonic transmitter 15 to perform cleaning. In the drying tank 1, rinsing of the object 33 is started. During this rinsing, the solvent is continuously injected into the washing / drying tank 1, and the opening / closing valve 17 is controlled to be opened / closed by the level sensor 16, so that a part of the solvent in the washing / drying tank 1 is removed from the washing solution tank 2
And the solvent in the washing and drying tank 1 is maintained at a predetermined liquid level.

When the ultrasonic transmitter 15 is operated for a predetermined rinsing time, the ultrasonic transmitter 15 and the pump 6 stop operating, the cleaning process is completed, and the open / close valves 5 and 11 of the liquid supply pipe 7 are turned on. Closed, the drain valve 17 is opened, and the solvent in the washing / drying tank 1 is discharged to the washing solution tank 2.

Next, when the rinsing process is completed, the on-off valve 22 of the heating duct 21 is opened, and the washing and drying tank 1 is communicated from the heating duct 21 to the atmosphere. At the same time, the opening / closing valve 26 of the cooling duct 25 is opened, and the washing / drying tank 1 is connected to the atmosphere via the cooling duct 25. In this state, the heating duct 21
When the blower fan 24 is driven, the air taken into the heating duct 21 is heated by the heating heat exchanger or heater 23 and supplied to the washing and drying tank 1.

The heated air supplied to the washing / drying tank 1 evaporates and evaporates the solvent adhering to the object to be washed, and the air flows out of the cooling duct 25 into the atmosphere. The vaporized solvent that has flowed out together with the air into the cooling duct 25 is cooled and condensed in a cooler 27 cooled by a refrigerant such as a refrigerator, and liquefied.
The liquid is collected in the cleaning solution tank 2 from the drain pipe 29 of the cooling duct 25.

When the hot air drying process for a predetermined time is completed, the on-off valve 22 of the heating duct 21 and the on-off valve 26 of the cooling duct 25 are closed. Then, the on-off valve 31 of the exhaust pipe 30 communicating with the bottom of the washing and drying tank 1 is opened, and the vacuum pump is opened.
Drive 32. The cleaning and drying tank 1 is driven by the driving of the vacuum pump 32.
The vacuum inside is reduced to about 5 torr. As the degree of vacuum in the washing and drying tank 1 progresses, the residual solvent humidified by the hot air in the previous drying step is evaporated and vaporized, and the vaporized solvent is cooled by the cooler 27 to be condensed and liquefied. The liquid is collected in the cleaning solution tank 2 from the drain pipe 29 of the duct 25. By this vacuum drying process, in particular, the solvent remaining in the gap between the objects to be cleaned of the small articles stored in the stack,
Alternatively, the solvent remaining in the deep hole or the like of the object to be cleaned is recovered.

After a predetermined period of time in the vacuum drying process,
The driving of the vacuum pump 32 is stopped, the on-off valve 31 is closed,
Vacuum drying ends.

The solvent in the washing solution tank 2 flows into the vacuum distilling machine 19 and is regenerated by operating the vacuum distilling machine 19 at all times or as needed, and the regenerated solvent is washed by the rinsing solution tank 3. Solution tank 3 for rinsing
Is passed into the washing solution tank 2 over the overflow partition.

[0038]

According to the first aspect of the present invention, washing, rinsing, and drying can be sequentially performed in one washing and drying tank, and the washing solvent and the rinsing solvent are dried by hot air and vacuum. It can be reliably collected, there is no environmental pollution, work efficiency is good, the installation area can be reduced, and the finished state can be greatly improved.

According to the second aspect of the present invention, the solvent in the cleaning solution tank is regenerated and supplied to the rinsing solution tank by the vacuum distillation machine. The solvent flowing from the rinsing solution tank is supplied, so that parts and the like can be continuously washed.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an apparatus for cleaning and drying parts and the like according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing / drying tank 2 Washing solution tank 3 Rinse solution tank 6 Pump 7 Liquid sending pipe 15 Ultrasonic transmitter 18 Drain pipe 19 Vacuum distillation machine 20 Overflow partition 21 Heating duct 24 Ventilation fan 25 Cooling duct 29 Drain Piping 30 Exhaust pipe 32 Vacuum pump

Claims (2)

(57) [Claims] 1. A cleaning / drying tank provided with an ultrasonic wave transmitter at a bottom portion for storing and drying an object to be cleaned, a cleaning solution tank, and a rinsing solution tank. A liquid feed pipe connected to a pump for selectively supplying a solvent from the rinsing solution tank to the washing / drying tank; a drain pipe collecting the solvent in the washing / drying tank into the washing solution tank; A heating duct having a fan and communicating with the washing and drying tank; a cooling duct connected to a drain pipe and communicating with the washing and drying tank; and a vacuum pump connected between the washing and drying tank and the cooling duct. A washing and drying apparatus for parts and the like, characterized by having an exhaust pipe provided. 2. The cleaning solution tank and the rinsing solution tank are formed adjacent to each other via an overflow partition so that the solvent of the rinsing solution tank is made to be the cleaning solution tank. The washing and drying apparatus for parts and the like according to claim 1, wherein the tank is connected to a vacuum still and the vacuum still is connected to a solution tank for rinsing.