JPH07328565A - Apparatus for washing part - Google Patents

Abstract

PURPOSE:To improve a washing capacity and to downsize an apparatus 7g, by a process in which a vertical cylinder for receiving washing is installed in a free insertion state in a washing tower which is integrated into a washing liquid circulating line, and when the washing in the cylinder is washed with washing liquid passing forcedly through the cylinder, a liquid passing hole is provided only in the bottom of the cylinder. CONSTITUTION:A vertical cylinder 7 for receiving washing is installed in a free insertion state in a washing tower 4 which is integrated into a washing liquid 2 circulating line 3, and the washing (a) in the cylinder 7 is washed with washing liquid which passes forcedly through the cylinder 7. In this process, the barrel part of the cylinder 7 has no liquid passing hole, and only the bottom part is provided with the hole. A supply line 11 of air or hot air and a discharge line 12 are installed in the washing tower 4 switchably with the washing liquid circulating line 3. As a result, the washing capacity improves. Uneven washing can be avoided even when the washing is piled high, and a long cylinder can be used so that the apparatus can be made compact, accomplishing efficient drying.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for cleaning electronic parts, metal parts, precision parts and other parts (hereinafter referred to as "objects to be cleaned").

[0002]

2. Description of the Related Art Conventionally, the cleaning of an object to be cleaned has conventionally been carried out by providing a tank in which a liquid is sprayed in the air, a method of spraying a liquid jet from a nozzle or the like in the liquid, It was done by the method of applying ultrasonic waves. However, according to these methods, the strength of spraying of the liquid and the strength of the ultrasonic waves are generated on the object to be cleaned, and it is difficult to clean the object to be cleaned evenly. In particular, when the objects to be cleaned are stacked and cleaned, the flow of the liquid is poor in the central part of the object to be cleaned and ultrasonic waves are absorbed by the surface of the layer and weakened in the central part, resulting in severe cleaning unevenness.

Recently, an object to be cleaned is placed in a basket-shaped object-to-be-cleaned object container having a gap hole portion provided in a cleaning tank so that the object to be cleaned does not fall out, and is forcibly distributed in the container. A cleaning device having a structure for cleaning an object to be cleaned with a cleaning liquid is proposed (for example, see JP-A-6-114356). This known cleaning device has a problem that when the height of the layer to be cleaned is increased, the flow of the liquid is bad in the center part of the layer, especially in the lower part of the layer, and uneven cleaning is likely to occur. Further, due to these problems, it is not suitable for a device having a vertically long container for the purpose of reducing the installation space.

The present invention has been made for the purpose of eliminating such conventional problems.

[0005]

According to the present invention, a vertical container for accommodating an object to be cleaned is accommodated and installed in a cleaning tower incorporated in a circulation line of the cleaning liquid for cleaning liquid in a loosely inserted state. In an apparatus for cleaning an object to be cleaned contained in a cylinder with a cleaning liquid forcibly flowing in the container, the container has a liquid passage hole in the body and a liquid passage hole only in the bottom. And a cleaning device for parts.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following will describe one embodiment of the present invention with reference to the accompanying drawings.

As is apparent from the overall flow diagram schematically shown in FIG. 1, the device of the present invention is a liquid for circulating the cleaning liquid 2 stored in the liquid tank 1 between the liquid outlet 1a and the liquid return port 1b. A circulation line 3 is provided, and a washing tower 4 is provided in the middle of the line 3.
A liquid feed pump 5 for forced liquid circulation is installed.

In the illustrated example, the cleaning tower 4 is installed above the liquid tank 1 to return the residual cleaning liquid in the tower 4 to the liquid tank 1 through the return line 6 by utilizing the head difference. However, if it is returned using a pump, it is not necessary to install it above. The return line 6 is equipped with a valve V ₅ .

In the cleaning tower 4, an object to be cleaned a such as parts a
The vertical container 7 for housing the is accommodated and installed in a state of being loosely inserted and suspended.

In order to make it possible to accommodate and install the vertical container 7 in a suspended state, a flange portion 8 is provided at the upper end of the container 7, and the flange portion 8 is formed on the inner peripheral surface of the tower 4. It is suspended on an annular member 9 that projects inward from the upper end.

The overlapping portion of the flange portion 8 and the annular member 9 is 3
The seal portion 10 is in surface contact with no gap over the entire 60 ° range.
The inside of the washing tower 4 is divided into an upper chamber 4a and a lower chamber 4b with the seal portion 10 as a boundary.

In the liquid circulation line 3, the outward path 3a is connected to the upper chamber 4a of the washing tower 4 starting from the liquid outlet 1a, and the return path 3b is starting from the upper end of the lower chamber 4b as the starting point.
connected to b.

As shown in detail in FIGS. 2 and 3, the vertical container 7 is a bottomed cylinder, and the bottom 7a is made of a perforated member such as punching metal or wire mesh, and is axially passed. Liquid is possible, and the body portion 7b is made of a non-porous member so that the liquid does not flow out from the body portion 7b.

The cross-sectional shape of the cylinder is not particularly limited and may be circular or polygonal, but generally the circular shape shown in FIG. 2 is preferable. The vertical container may have a structure in which the container is divided into a plurality of parts by a partition plate or the like.

The vertical container 7 is preferably as long as possible in order to accommodate a large number of objects to be cleaned a with a comparatively small cross-sectional area, but if it is too long, it is impossible to design the apparatus. Therefore, the ratio of the diameter to the height is set to the former 1 to the latter 1 to 10, preferably to the range of 2 to 5. The diameter of the vertical container 7 is not particularly limited and may be appropriately determined depending on the type of the object to be cleaned, but normally 1
It is about 1 cm to 1 cm. Preferably 5 cm to 50 c
m, more preferably 8 cm to 30 cm.

A wind or hot air supply line 11 diverging from the middle of the outward path 3a of the liquid circulation line 3 in order to enable the liquid draining and the drying to be performed subsequent to the cleaning of the object to be cleaned a.
And an exhaust line 12 branching from the middle of the return path 3b, and a blower 13 is provided in the wind or hot air supply line 11.
And a heater 14 are provided. It should be noted that only the blower 13 is used in the case of draining after the washing, and the blower 13 and the heater 14 are used in the case of drying.
The blower 13 may be provided in the line 11 before the heater 14 as shown in FIG. 1, or may be provided after the line 12 or the gas-liquid separator 15.

Valves V _{1 to} V ₄ are provided in the reciprocating paths 3a and 3b between the lines 11 and 12 and the liquid circulation line 3,
The liquid circulation line and the drying line can be switched by opening and closing the equalizing valves V _{1 to} V ₄ .

When performing cleaning of the object to be cleaned a, as shown in FIG.
In the state shown in (3), the liquid feed pump 5 is operated and the cleaning liquid 2 in the liquid tank 1 is forcedly circulated in the liquid circulation line 3. During this cleaning operation, the valves V _{1 to} V ₂ are kept open and the valves V _{3 to} V ₅ are kept closed.

While the cleaning liquid forcibly circulated in the liquid circulation line 3 enters the vertical container 7 from the outward path 3a through the upper chamber 4a of the cleaning tower 4, while being forcedly circulated in the container 7 in the axial direction. Then, the object to be cleaned a is cleaned.

Since the container 7 is vertically long and has a relatively small cross-sectional area, and the entire amount of the cleaning liquid passes through the container 7 from the upper end to the lower end, the cleaning liquid is efficiently covered at a relatively high flow rate. It becomes possible to contact the cleaning object a, and the entire cleaning object a can be uniformly cleaned even when the stack height of the cleaning object a is relatively large.

The liquid after cleaning enters the lower part of the lower chamber 4a of the tower 4 from the lower end of the vessel 7 and ascends in the lower chamber 4a, returns to the liquid tank 1 via the return path 3b, and so on.

After the cleaning for a predetermined time, the operation of the pump 5 is stopped, the circulation of the cleaning liquid is stopped, and the valves V ₁ and V ₂ are closed while the valves V _{3 to} V ₅ are opened.

By opening the valves V _{3 to} V ₅ , the residual cleaning liquid in the cleaning tower 4 and the container 7 is returned to the liquid tank 1 through the return line 6, while the outside air is drained and dried on the line 11. ，
It passes through 12 and enters the container 7 and the washing tower 4. After the collection of the residual cleaning liquid is completed, the valve 5 is closed.

Next, when the blower 13 is operated to dry the outside air, the heater 14 heats it and the washing tower 4 passes through the line 11 while heating.
The liquid is sent from the upper chamber 4a into the container 7, where the object to be cleaned a is drained and dried, and the adhering cleaning liquid is removed.

The adhering liquid separated from the object to be cleaned or the like flows down or drops and collects at the bottom of the lower chamber 4b of the cleaning tower 4, and the adhering liquid collected at the bottom is returned to the return line by opening and closing the valve V ₅ after the completion of the drying operation. It is returned to the liquid tank 1 through 6.

On the other hand, the wind or hot air enters the lower part of the lower chamber 4b of the washing tower 4 from the lower end of the container 7, and the cleaning liquid is left at the bottom of the lower chamber 4b and is directed toward the upper part of the lower chamber 4b while passing through the exhaust line 12 to the atmosphere. Released inside.

A gas-liquid separator 15 may be provided in the exhaust line 12, and the separated liquid may be returned to the liquid tank 1 through the return line 16 by opening and closing the valve V ₆ .

In the embodiment shown in FIG. 1, since the adhered liquid and the air or the hot air can be separated in the lower chamber 4b of the washing tower 4, it is necessary to separately provide a line for separating them. The entire device can be simplified.

After draining and drying the object a to be cleaned, the operation of the blower 13 is stopped and V ₃ and V ₄ are closed. Next, the upper lid 17 of the washing tower 4 is opened and the container 7 is replaced with the next container to prepare for the next cleaning operation.

In the present invention, the return path 3b of the liquid circulation line 3 is provided between the bottom of the lower chamber 4b of the cleaning tower 4 and the liquid return port 1b of the liquid tank 1 as shown in FIG. Good. In this case, the return path 3b also serves as the return line 6 for the residual cleaning liquid.

Further, as shown in FIG. 5, the outward path 3a of the liquid circulation line 3 is located at the bottom of the lower chamber 4b of the cleaning tower 4 and the return path 3b.
May be connected to the upper chamber 4a. In this case, the cleaning liquid passes through the vertical container 7 from the lower end toward the upper side, and during this time, the object a to be cleaned is made to flow, so that the cleaning property is improved. A rope member 18 may be provided at the upper end of the container 7 for the purpose of preventing the article a to be cleaned from flowing out.

Further, in the present invention, as shown in FIG. 6, the cleaning tower 4 can be provided with a plurality of sets, for example, three sets of circulation systems for the cleaning liquid. The three circulation systems are individually liquid tanks 1A, 1
B, 1C and liquid circulation lines 3A, 3B, 3C are provided so that they can be sequentially switched to be used for cleaning.
With such a configuration, it is convenient when performing repeated cleaning with different kinds of cleaning solutions or cleaning, preliminary rinsing, main rinsing, and the like sequentially.

In the present invention, the number of the vertical container 7 inserted and installed in the washing tower 4 is arbitrary, in the case of one as shown in FIG. 1 and in the case of a plurality as shown in FIG. There is.

As the cleaning liquid used in the present invention,
In addition to pure water, industrial water, etc., cleaning agents for hydrocarbon solvents, glycol ether compounds or alcohol solvents,
Alternatively, a water-based detergent comprising a mixture of these with various surfactants and / or water, an emulsion-based detergent comprising the above mixture, and further a cationic or anionic detergent,
Nonionic detergents can also be used. Further, such a cleaning liquid may be appropriately warmed by a heater and used in order to enhance the cleaning power.

In the cleaning apparatus of the present invention, the vertical container 7 has no liquid passage hole in the body portion 7b and therefore cannot pass liquid, and the bottom portion 7a is not able to pass through.
Since it has a liquid passage hole only in, the liquid flows only in the vertical direction.

Therefore, during the cleaning operation, the entire amount of the cleaning liquid passes through the container 7, so that the flow velocity of the cleaning liquid in the container 7 is almost constant from the upper end to the lower end, and the total amount of the cleaning liquid is the same as the object to be cleaned. Contact.

For example, in the case where the bottom portion 7a and the body portion 7b of the container 7 have liquid passage holes, a part of the cleaning liquid passes through the liquid passage holes of the body portion outside the container while the passage of the washing liquid in the container. Because it will be leaked to
The flow velocity of the cleaning liquid in the container gradually decreases as it goes downward, and the average flow velocity in the container is considerably lower than that of the present invention depending on the opening ratio of the barrel. Further, since the cleaning liquid that has flowed out through the liquid passage hole in the body of the container does not come into contact with the object to be cleaned again, the amount of the cleaning liquid that comes into contact with the object to be cleaned is reduced, and the total amount of the cleaning liquid is not covered. The contact efficiency is lower than that of the present invention in which the object is contacted with the washed product. The flow rate is appropriately adjusted depending on the type of the object to be cleaned, but since the flow rate is almost constant from the upper end to the lower end, the cleaning efficiency can be increased by increasing the flow rate.

In short, in the present invention, since the container having the liquid passage hole only at the bottom is used as the container, the so-called basket-like container having the liquid passage hole at the whole including the body and the bottom is used. Cleaning performance can be improved compared to the type.

In the following, the device of the present invention and the device of the present invention have the same cleanability as the comparative example having the same structure except that the body portion of the container has a liquid passage hole (porosity 40%). The results of the comparative test are as follows. A cleaning apparatus of the type shown in FIG. 1 was used for the comparative test.

[How to stack the objects to be cleaned] Container (diameter 90
mmφ, height 230mm), inner diameter 3mmφ, length 8m
m aluminum tube was put in, and every time the stacking height became about 13.5 mm, grease-contaminated inner diameter 3 mmφ, length 15
One mm brass tube was put in each. A total of 10 brass tubes were put in, and the stack height of the aluminum tubes was about 150 mm.

[Comparison Test Results]

[0042]

[Table 1]

* Cleaning liquid: Pine Alpha ST-100N
(Arakawa Chemical Co., Ltd. quasi-water type cleaning agent) * Washing temperature: 60 ° C [Consideration] In the present invention, the inflow rate of the washing liquid in the container is 1
When the speed was relatively slow at 3 cm / sec, four out of ten cleaning failures (visual observation) occurred, but the cleaning failure disappeared by doubling the inflow speed. On the other hand,
In comparison, the cleaning failure rate was still 100% even if the inflow rate was increased, and no improvement in cleaning performance was observed.

[0044]

According to the cleaning apparatus of the present invention, the following effects can be obtained.

(A) The cleaning performance can be improved as compared with the conventional system in which the object to be cleaned is placed in a so-called basket-like container having liquid passage holes on the entire surface and the cleaning liquid is forced to flow.

(B) Since the cleaning performance is improved, uneven cleaning does not occur even if the stacking height of the objects to be cleaned is increased. Therefore, a vertically long container can be used, and the container can be installed. The space can be reduced and the device can be made compact.

(C) By providing a hot air (or wind) supply line and an exhaust air line, liquid draining and drying can be efficiently performed at once.

[Brief description of drawings]

FIG. 1 is an overall flow chart showing an embodiment of a device of the present invention.

FIG. 2 is a vertical cross-sectional view of a vertical container provided in the device of the present invention.

FIG. 3 is a plan view of the same.

FIG. 4 is a flow chart showing a modification of the liquid circulation line.

FIG. 5 is a flowchart showing another modification of the same.

FIG. 6 is a flowchart showing an example of a case where a plurality of liquid circulation systems are provided.

FIG. 7 is an explanatory diagram showing an example in the case of including a plurality of vertical containers.

[Explanation of symbols]

 1 Liquid Tank 2 Cleaning Liquid 3 Liquid Circulation Line 4 Cleaning Tower 5 Liquid Sending Pump 6 Return Line 7 Vertical Container 8 Flange 9 Ring Member 10 Sealing Part 11 Air or Hot Air Supply Line 12 Exhaust Air Line 13 Blower 14 Heater 15 Gas Liquid Separator 16 Return line 17 Upper lid 18 Net member

Claims (5)

[Claims] 1. A vertical container for accommodating an object to be cleaned is housed in a cleaning tower incorporated in a cleaning liquid circulation line in a loosely inserted state, and the object to be cleaned contained in the container is housed. A device for cleaning with a cleaning liquid forcibly flowing through the container, wherein the container has a liquid passage hole only in the bottom portion and no liquid passage hole in the body portion. 2. The cleaning apparatus according to claim 1, wherein the cleaning tower is provided with a supply line and a discharge line of air or hot air, which is switchable with the circulation line of the cleaning liquid. 3. A vertical container is installed in a washing tower in a suspended state, and the inside of the cleaning tower is divided into an upper chamber and a lower chamber. The container is at the upper end side in the upper chamber and at the lower end side. The cleaning liquid is communicated with the lower part of the lower chamber, and the cleaning liquid passes through the upper chamber, the vertical container, the lower part of the lower chamber and then the upper part of the lower chamber in this order.
The cleaning device according to claim 1, further comprising a discharge line for the residual cleaning liquid. 4. The washing tower upper chamber is provided with a wind or hot air supply line, and the lower chamber upper portion is provided with the same discharge line so as to be switchable with the washing liquid circulation line, respectively. Cleaning equipment. 5. The cleaning apparatus according to claim 1 or 3, wherein the vertical container is vertically long and the ratio of the diameter to the height is 1 to 10 for the former.