JPH03131374A - Washing apparatus using combustible solvent - Google Patents

Abstract

PURPOSE:To prevent the danger of ignition by forming a cover body to the received liquid of a receiving tank and forming a washing part to a cover chamber. CONSTITUTION:A cover body 7 is raised and the introducing port 6 of an object 5 to be washed is brought to an open state not in contact with a received liquid 2 and the opening part 4 provided to the lower end of the cover body 7 is inserted in the received liquid 2. Then, the continuous introduction to the object 5 to be washed is made possible to perform washing work. The insertion port 14 of the object 5 to be washed is opened to the introducing casing 11 allowed to confront to the introducing port 6 to facilitate the introduction of the object 5 to be washed to the introducing port 6. The vapor and splash of a solvent generated by washing work are stagnated in the cover body 7 to be prevented from the leakage to the outside. By this method, the danger of ignition is eliminated and safety can be enhanced.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a cleaning device using a flammable solvent, and is intended to safely clean mechanical parts, printed circuit boards, etc. using a flammable solvent. It is something.

Conventional technology Conventionally, fluorocarbon-based solvents were generally used to clean mechanical parts, printed circuit boards, etc. because they are nonflammable, pose no risk of ignition, and have excellent cleaning power. Its use has become regulated because it is associated with environmental destruction. Possible solvents to replace CFC-based solvents include terpene solvents whose main ingredient is oil extracted from oranges, compositions consisting of a mixture of terpene solvents and terpene emulsifying surfactants, and solvents such as alcohol and kerosene. Both are flammable solvents and cannot be used in the past because safety against ignition cannot be ensured.

Problems to be Solved by the Invention The present invention attempts to solve the above-mentioned problems, and uses a flammable solvent in the cleaning liquid that has excellent cleaning power and does not cause destruction of the global environment, while eliminating the risk of ignition. The aim is to prevent damage and to perform safe and continuous cleaning efficiently.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a storage tank that stores a non-flammable or flame-retardant storage liquid, and an inlet for introducing objects to be cleaned into the storage liquid of the storage tank. A covering member is formed into which the opening at the lower end is inserted, and a cleaning part is formed in the covering chamber covered by the covering member to perform cleaning by bringing the object to be cleaned into contact with a flammable solvent. It is what it is.

Moreover, the stored liquid may be water.

The stored liquid may also be a flame retardant oil with a high boiling point.

The flammable solvent may also be a terpene solvent.

The flammable solvent may also be a composition comprising a terpene solvent and a terpene emulsifying surfactant.

Moreover, the flammable solvent may be alcohol.

The flammable solvent may also be kerosene.

Further, the covering may have an opening inserted into the stored liquid immovably except for the inlet.

Further, the covering body may be positioned so as to be movable forward and backward relative to the stored liquid, so that the inlet port can be inserted into the stored liquid during non-cleaning, and the covering chamber can be sealed with the stored liquid.

Further, the contact between the flammable solvent and the object to be cleaned in the cleaning section may be carried out by spraying the flammable solvent onto the object to be cleaned in the form of a shower.

Further, the coating chamber may be connected to a means for recovering the scattered solvent, and a gas flow may be generated from the inlet of the object to be cleaned toward the inside of the coating chamber.

Further, the object to be cleaned may be introduced into the coating chamber I\ from the inlet, and the object to be cleaned may be taken out from the coating chamber via the stored liquid.

Function Since the present invention is configured as described above, when the object to be cleaned is cleaned with the flammable solvent in the cleaning section where the flammable solvent and the object to be cleaned come into contact, the solvent vapor and scattering generated by this cleaning are Splashes, etc., remain in the cover, which has an opening at the bottom inserted into a non-flammable or flame-retardant storage liquid, and there are places other than the inlet of the object to be cleaned where solvent vapor, droplets, etc. can leak outside. Therefore, the risk of ignition is extremely low unless something that could cause ignition is placed inside this covering. Also, even if some ignition occurs, the opening at the bottom of the cover is inserted into a nonflammable or flame-retardant liquid, and the inlet for the object to be cleaned is slightly opened. , it becomes possible to reduce the risk of ignition. Further, since the coating chamber has an open inlet for introducing the object to be cleaned, it becomes possible to continuously introduce the object to be cleaned at all times, thereby enabling efficient cleaning work.

Moreover, if the stored liquid is water, it is economical and non-flammable, so a high degree of safety against ignition can be obtained.

In addition, if the stored liquid is a flame-retardant oil with a high boiling point, when using a solvent that dissolves in water such as alcohol, it is possible to prevent the solvent from dissolving in the stored liquid and prevent the stored liquid from becoming flammable. As in the case of , there is no loss of weight due to evaporation, and the occurrence of rust on the parts used can be prevented.

In addition, the flammable solvent may be a terpene solvent,
It may be a composition consisting of a terpene solvent and a terpene emulsifying surfactant, it may be alcohol, it may be kerosene, and any flammable solvent may be used depending on the purpose of cleaning.

Further, if the covering body has an opening portion inserted into the stored liquid in a stationary manner except for the inlet, no power is required to operate the covering body, and an economical cleaning operation becomes possible.

In addition, if the covering body is positioned so that it can move forward and backward relative to the stored liquid, and the inlet port can be inserted into the stored liquid when not cleaning, and the covering chamber can be sealed with the stored liquid, it will be possible to close the covering chamber with the stored liquid. Prevents solvent vapor, droplets, etc. from flowing out from the inlet, allowing safe storage of cleaning equipment.

Furthermore, if the flammable solvent comes into contact with the object to be cleaned in the cleaning section by spraying the flammable solvent onto the object to be cleaned in the form of a shower, powerful cleaning of the entire object to be cleaned becomes possible.

Furthermore, by connecting a means for collecting scattered solvent to the coating chamber, it is possible to reduce the concentration of flammable solvent vapor and splashes in the coating chamber, further reducing the risk of ignition. At the same time, by using this recovery means to generate a gas flow from the inlet of the object to be cleaned toward the inside of the coating chamber, the flow of flammable solvent vapor and droplets from the inlet can be prevented and safe cleaning can be achieved. enable work.

Furthermore, if the object to be cleaned is introduced into the coating chamber l\ from the inlet, and the object to be cleaned is taken out from the coating chamber via the stored liquid, vapors and splashes of flammable solvents, etc. Continuous and efficient cleaning of objects is possible while preventing diffusion.

Embodiment Below, one embodiment of the present invention will be described with reference to the drawings.
) is a storage tank that stores a flame-retardant storage liquid (2) such as non-flammable water or flame-retardant oil with a high boiling point, but it is economical and economical to use water as the storage liquid (2). Since it can maintain non-flammability, a high degree of safety can be obtained during cleaning work.In addition, the stored liquid (2) can be replaced with flame-retardant oil such as heat transfer oil with a high boiling point, cutting oil, spindle oil, etc. Therefore, when using a flammable solvent (3) such as alcohol that dissolves in water, it is possible to prevent the flammable solvent (3) from dissolving in the stored liquid (2) and prevent the stored liquid (2) from becoming flammable. This can prevent the loss of weight due to evaporation like water, and the occurrence of rust on metal parts.

In addition, a covering (7) is formed in the storage liquid (2) of the storage tank (1), with the opening (4) at the lower end inserted except for the inlet (6) for the object to be cleaned (5). A flammable solvent (3) and an object to be cleaned (5) are placed in a coating chamber (8) provided in this coating (7).
) and the flammable solvent (3) forming the cleaning part (10) that comes into contact with the cleaning part (3) are not particularly limited as long as they meet the purpose of cleaning, but for example, they can be used to clean flux residue from printed circuit boards. For this purpose, a terpene solvent or a composition comprising a terpene solvent and a terpene emulsifying surfactant is preferred. Further, as the flammable solvent (3), any flammable solvent such as alcohol or kerosene can be used depending on other cleaning purposes.

Further, the above-mentioned covering (7) may have an opening (4) inserted into the storage liquid (2) immovably, but in the embodiment shown in the drawings, the storage tank (1) Cover the top surface of (
A cylinder rod (13) of a cylinder <12) which is covered with a casing (11) together with 7) and fixed to the upper surface of this casing (11) is connected to the covering body (7) by passing through the casing (11), This covering (7) is movable up and down. In order to wash the object to be cleaned (5), the covering body (7) is raised as shown in Fig. 1, and the inlet port (6) of the object to be cleaned (5) is connected to the storage liquid (2). The open state of contact and the opening at the lower end of the covering (7) (
4) is inserted into the stored liquid (2), and the cleaning work is performed by making it possible to continuously introduce the cleaning part (10)/\ of the object (5) to be cleaned. In addition, an insertion port 14) for the object to be cleaned (5) is opened in the casing 11) facing the introduction port (6), and an insertion conveyor (15) is installed.
This makes it easy to introduce the object to be cleaned (5).

In addition, a transfer conveyor (16) is located on the same plane as the insertion conveyor (15) in the coating chamber 8) in the overnight heating body (7), and a transfer conveyor (16) is located at the end of the transfer conveyor (16) in the transfer direction. Then, the chain conveyor (17) is positioned by the subrocket pole (18), and the object to be cleaned (5) is transferred from the coating chamber (8) through the stored liquid (2) to the stored liquid (2).
A water shower (2) is installed at this outlet to remove the flammable solvent (3) attached to the object (5) to be cleaned.
0) is installed. Furthermore, this flush shower (
A primary removal section (22) is provided in the stored liquid (2) in front of the storage liquid (2) using a pump (21) to suction and pressurize the stored liquid (2) and spray it onto the object to be cleaned (5). The object to be cleaned (5) that has passed through the section 22) is subjected to secondary cleaning by a water shower (2o) in which the stored liquid (2) is purified through a filtering means (23). Furthermore, this flush shower (2o
), the cleaning of the object to be cleaned (5) by the next removal section (22) is as follows:
Flammable liquid 7FIJ (3) placed on the item to be cleaned (5)
It is preferable to carry out this process when the flammable solvent (3) is water-soluble and the storage liquid (2) is water.

In addition, a delivery conveyor (24) is located in the direction in which the items to be cleaned (5) are taken out of the flush shower (20), and this delivery conveyor (24) protrudes from the delivery port (25) provided in the casing (11). , it is possible to take out the object to be cleaned (5).

In addition, the cleaning part (1o) in the covering (7) is cleaned using a flammable solvent (
Place the saucer (26) of 3) facing the bottom surface of the covering plate 7), and place the saucer (26) of 3) facing the lower surface of the object (5) to be washed that passes through the tray (26) 9+J. A shower (27) is located, and the flammable solvent (3) in the filling tank (28) installed in the stored liquid (2) is pumped into the shower (27).
30), and the flammable solvent (3) is sprayed from both sides of the lower surface of the 1 by a shower (27) to perform cleaning. With this configuration, the object to be cleaned (5) can be cleaned with a simple mechanism, and continuous cleaning can be performed (Th<5).

Further, the cleaning of the object to be cleaned (5) does not necessarily have to be done by showering, but it is of course possible to use immersion cleaning in which the object is immersed in a cleaning liquid made of a flammable solvent.

In addition, solvent vapor, scattered droplets, etc. generated by the above-mentioned cleaning work remain in the covering (7), which is covered by inserting the opening (4) at the lower end into a non-flammable or flame-retardant storage liquid (2). However, since there is very little leakage to the outside, the risk of ignition is almost eliminated unless there is a problem within this covering that could cause ignition (V). In addition, even if some ignition occurs, the lower opening (4) of the sheathing (7) is covered with a non-flammable or flame-retardant storage liquid (2), reducing the risk of ignition. It becomes possible to do so.

In addition, if a collection means (31) for collecting steam, scattered solvent droplets, etc. is connected to the coating chamber (8) in the coating body (7), the coating chamber (
8) It becomes possible to reduce the concentration of vapor, droplets, etc. of the flammable solvent <3) in the inside, and it becomes possible to further reduce the risk of ignition. The recovery means (31) connects a suction pipe (33) with a suction port (32) protruding from the upper part of the coating chamber (8) to the condensation chamber (3) of the recovery tank (34).
5), and the flowing liquid layer (37) formed by the cooling liquid pipe 36) condenses the vapor, splashed solvent, etc. introduced from the suction pipe (33), and also connects it to the condensation chamber (35).
and the partition wall (38), and the communication port (38) of the partition wall (38)
40) is inserted into the cooling liquid chamber (36).
A discharge pipe (43) is connected to the two-part space (42) of 41), and the clean gas in this -F part space (42) is transferred to the object to be cleaned (
By refluxing the flammable solvent (3) into the coating chamber (8) from the inlet (6) of ) to the inside of the coating chamber (8), it is possible to prevent solvent vapor, splashes, etc. from flowing out from the inlet (6), and to reliably prevent the risk of ignition. .

In addition, as mentioned above, it is not always necessary to use a condensation mechanism to collect the vapor, droplets, etc. of the flammable solvent (3), and any other recovery device can be used, such as a mist catcher, solvent vapor, etc. , droplets, etc. may be sucked in by the suction power of a fan, and then filtered by a filter. ) Gachi coating room (8
), thereby making it possible to more reliably prevent solvent vapor, droplets, etc. from flowing out from the inlet (6).

After the cleaning work is completed, operate the cylinder (12) fixed to the negative side of this gauging (11,), lower the covering (7) as shown in Figure 2, and open the inlet (6). Insert the coating chamber (8) into the storage liquid (2) and insert the coating chamber (8) into the storage liquid (2).
If the seal is sealed with
l (6) to σ) Solvent vapor, splash, etc.) Prevents leakage and enables safe storage of cleaning equipment.

Effects of the Invention Since the present invention is constructed as described above, the solvent vapor generated by cleaning, the scattered droplets, etc., leak to the outside from the covering whose lower end opening is closed with the liquid contained therein. Since there is no or very little risk of ignition due to sparks, static electricity, etc. in external devices, the risk of ignition becomes hot. Furthermore, even if some ignition occurs, the risk of ignition can be reduced by using a non-flammable or flame-retardant storage liquid.

In addition, during cleaning work, since the inlet for the object to be cleaned is opened, the object to be cleaned can be introduced continuously, making continuous and efficient cleaning possible, and the inlet is open.
If the amount is kept to the minimum necessary for introducing the substrate or other object to be cleaned into the pudding 1, the outflow of solvent vapor, droplets, etc. will be extremely small, and there will be almost no risk of ignition.

In addition, since the stored liquid can be separated from 2 water in an economical and non-flammable manner, a high degree of safety can be achieved.

5 If the storage liquid is different from flame-retardant oil with a high boiling point, it will prevent the solvent from dissolving in the storage liquid and prevent the storage liquid from becoming flammable in places where water-soluble solvents such as alcohol are used. At the same time, there is no loss of weight due to evaporation, as in the case of water, and the occurrence of rust on the parts used can be prevented.

Furthermore, if the flammable solvent comes into contact with the object to be cleaned in the cleaning section by spraying the flammable solvent in the form of a shower, powerful cleaning of the entire object to be cleaned becomes possible.

In addition, by connecting a means for collecting scattered solvent to the coating chamber, it is possible to reduce the concentration of flammable solvent vapor and splashes, further reducing the risk of ignition. Is it an inlet for things? 4. Producing a gas flow in the interior direction of the coating chamber prevents flammable solvent vapor, droplets, etc. from flowing out from the inlet and enables safe cleaning operations.

In addition, the object to be cleaned is introduced into the coating chamber J\ from the inlet, and the object to be cleaned is taken out from the coating chamber.l]5! If all the stored liquid is extracted (mog), then the vapor of flammable solvent,
Continuous cleaning of objects to be cleaned is possible while preventing the spread of droplets, etc.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a cross-sectional view showing a cleaning state of an object to be cleaned, and FIG. 2 is a cross-sectional view of a non-cleaning operation state in which the coating chamber is sealed.

Claims (12)

[Claims] (1) A storage tank containing a non-flammable or flame-retardant storage liquid is provided, and a covering is formed into the storage liquid of the storage tank into which an opening at the lower end is inserted, excluding the inlet of the object to be cleaned, A cleaning device using a flammable solvent, characterized in that a cleaning section is formed in a coating chamber covered by the coating body to perform cleaning by bringing the flammable solvent into contact with an object to be cleaned. (2) Claim 1, wherein the stored liquid is water.
Cleaning equipment using the flammable solvents described. (3) The cleaning device using a flammable solvent according to claim 1, wherein the stored liquid is a flame-retardant oil with a high boiling point. (4) The cleaning device using a flammable solvent according to claim 1, wherein the flammable solvent is a terpene solvent. (5) Claim 1, wherein the flammable solvent is a composition consisting of a terpene solvent and a terpene emulsifying surfactant.
Cleaning equipment using the flammable solvents described. (6) The cleaning device using a flammable solvent according to claim 1, wherein the flammable solvent is alcohol. (7) The cleaning device using a flammable solvent according to claim 1, wherein the flammable solvent is kerosene. (8) The cleaning device using a flammable solvent according to claim 1, wherein the covering has an opening inserted into the stored liquid immovably except for the inlet. (9) The covering body is positioned so that it can move forward and backward with respect to the stored liquid,
2. The cleaning device using a flammable solvent according to claim 1, wherein the inlet can be inserted into the stored liquid during non-cleaning operations, and the coating chamber can be sealed with the stored liquid. (10) Using the flammable solvent according to claim 1, wherein the contact between the flammable solvent and the object to be cleaned in the cleaning section is carried out by spraying the flammable solvent onto the object to be cleaned in the form of a shower. cleaning equipment. (11) The flammable solvent according to claim 1 is connected to the coating chamber to collect a scattered solvent, and to generate a gas flow from the inlet of the object to be cleaned toward the inside of the coating chamber. Cleaning equipment used. (12) The combustible material according to claim 1 or 8, characterized in that the object to be cleaned is introduced into the coating chamber through an inlet, and the object to be cleaned is taken out from the coating chamber via the stored liquid. Cleaning equipment using a sterile solvent.