JPS62120488A - Method and apparatus for washing goods - Google Patents

Abstract

PURPOSE:To completely wash and remove oils and fats on metal parts surface while recovering harmful solvent vapor, by passing metal parts adhered with oils and fats in a solvent vapor vessel and a solvent soln. vessel for oils and fats providing an automatic opening and closing door, prior to plating the parts. CONSTITUTION:Oils and fats adhered during machining must previously be removed at plating treatment of metal parts surface. Therefor, metal parts adhered with oils and fats is mounted on running machine, a foot switch 21 is operated to open the automatic opening and closing door 16, and vapor of organic chlorine system of freon solvent for oils and fats in the solvent vapor vessel 7 is generated. Running machine is entered into the vessel 7 from gap of the door 16, successively dipped in the solvent soln. vessel 8, passed in the vessel 7 again to completely wash and remove oils and fats on metal parts surface, taken out and the door 16 is automatically closed. Freon volatilized during opening the door 16 is introduced to a solvent recovering tower 15 through an exhausting duct 13 and recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method and apparatus for cleaning articles.

[Prior art J: Cu+Ni products, etc. that have been coated with oil or fat due to machining, etc.
When cleaning before plating, such as +SrzAg+Au plating, if the oils and fats adhering to the surface of the article are not completely removed during the cleaning process before plating, the plating metal may not be formed on the surface of the article or the plating film may swell. The luster of plated metal becomes uneven.

In order to avoid this, all oils and fats adhering to the surface of the article must be completely removed.

The method includes (7) immersion in a water-soluble organic solvent.

(a) Examples include fluorinated solvent solutions and steam bath immersion.

[Problems to be Solved by the Invention j The above-mentioned methods and devices for cleaning various articles have the following problems.

That is, in the case of (7) above, a water-soluble solvent such as acetone, ethanol, methanol, isopropyl alcohol, etc. is used to remove fats and oils adhering to the article. The ability to remove oils and fats adhering to the surface of the product is also poor, and the surface of the product is more likely to be contaminated.

In the case of (a) above, a solvent such as Freon is used to remove fats and oils adhering to the surface of the article, but the cost of the solvent is high and the boiling point of the solvent is low, so the solvent evaporates easily. The ability to remove fats and oils adhering to the surface of articles is also poor, and it cannot be put to practical use.

There were various technical problems that needed to be improved.

This invention was made to solve the above-mentioned technical problems, and its purpose is to provide a relatively simple method and apparatus for removing oil and fat attached to the surface of articles. be.

[Means for solving problems]

A method and apparatus for cleaning articles according to the present invention.

After careful study, the results were as follows: Oils and fats adhering to the surface of the article before plating are completely removed, and the evaporation loss of the solvent is extremely reduced. Moreover, the solvent does not evaporate and is discharged outside the system. It is also equipped with a recovery device. It is characterized by mechanizing the movement and running of articles, and automating the opening and closing of the device door and the heating method of the solvent.

[Effect]

In this invention, since an automatic opening/closing door is attached to the device, it is possible to prevent the solvent from volatilizing when the device is not in use.Furthermore, since a solvent recovery device is attached, the volatilization can be prevented when the device is not in use. Solvents can also be recovered.

〔Example〕

Examples are listed below, and the entire history of this invention will be explained in detail.

FIG. 1 is a side cross-sectional view of the device according to the invention, and FIG. 2 is a cross-sectional view taken along the line AN in FIG. 1.

FIG. 3 is a cross-sectional view taken along the line B-B' in FIG. 1.

In the figure, (!1 is the main body of the device, (21 is the cooling condenser, (31 is the cooling tower + (41+ (
5) is the circulating water flow path, (61 is the water separator, (7) is the solvent steam tank, (8) is the solvent solution tank, and c!1) is the separation between the bath agent steam tank and the solution tank. , (9) is a heater, α is a solenoid valve, Ql) is a temperature controller, (15 is a sensor, and basically consists of the above items.

When the device (1) is activated, the heater (
9) is ONK? The temperature regulator αυ controls the solenoid valve α[l until the temperature of the solvent reaches a predetermined temperature.

During this time, circulating water maintained at a constant temperature by a cooling tower (31) is supplied to a cooling condenser (21) through a flow path (4).
Circulation 1~ via 1, +51-. The solvent evaporated from the # agent vapor tank is condensed near the cooling condenser (2),
A vapor layer of solvent is formed.

The solvent that comes into contact with the cooling condenser (21) and becomes a solution is sent to the water separator (6) via the receiver plate (2) and the flow path (toward), where water in the solvent is removed. , the solvent is in the flow path α
The water that is sent to the solvent solution tank (8) via Ii and removed is discharged via flow path alt.

(13 is the exhaust duct), (141 is the exhaust fan tαS is the solvent recovery tower, aS is the automatic opening/closing door + the winder for the door.

Qυ is the foot switch for the automatic opening/closing door.

When the article is loaded onto the traveling machine and the automatic opening/closing door foot switch I2+1 is stepped on, the automatic opening/closing door (L/1) of the device (1) is pressed.
is opened while being rolled up by the door winder αD, and the automatic temperature controller αυ is activated and the solenoid valve αq is turned on.
The solvent is heated to its boiling point by the heater (9).

Next, an overview of the method and apparatus for cleaning articles using the apparatus according to the present invention will be explained.

The article with oil and fat adhering to its surface is immersed in a steam tank (7) filled with solvent vapor for a required period of time to remove the oil and fat.

Next, the article is pulled up from the Eri steam tank (7) to a predetermined position using a traveling machine, and then moved to the solvent solution tank (8).
The article is immersed in water for a required period of time to completely remove the oil and fat on the surface of the article that could not be removed in the steam bath (7).

Next, the article is pulled up from the solution tank (8) to a predetermined position by a traveling machine, moved in that position, and placed in the solution vapor tank (8).
7) to remove the solvent adhering to the surface of the article by soaking it for the required time.

After removal, if the articles are pulled up all at once, the vapor layer of the ζ solvent will be disturbed and the solvent will volatilize, so the articles are temporarily stopped in the middle of the cooling condenser (2). After that, at the same time as you pull up the items, turn off the foot switch 01li of the automatic opening/closing door.
Automatically open/close door t1e2 is closed.

On the other hand, when the exhaust fan I operates, the solvent volatilized onto the automatic opening/closing door (Ie) passes through the exhaust duct α3.

The solvent is sent to the solvent recovery tower a5 and recovered once.

[Effect of the Invention J] As described above, this invention completely removes oils and fats adhering to the surface of the article before plating, and also prevents the volatilization of harmful solvents by installing an IK door on the device. Since the volatilized solvent is also sent to the exhaust fan and recovered in the solvent recovery tower, it can be expected to be a resource-saving device, and it also contributes to the safety and health of the two operations.

[Brief explanation of drawings]

Fig. 1 is a side sectional view of the device according to the present invention; Fig. 2 is a cross-sectional view taken along line A-A' in Fig. 1;
It is a figure which shows the cross section gold of the figure BB' plane. In the figure, (1) is the device main body, (2) is the cooling condenser, (3) is the cooling tower, (6) is the water separator,
(7) is a solvent vapor tank, (8) is a solvent solution tank, (9)
is a heater, (1G is a solenoid valve, υ is a temperature controller, α2
is the sensor tαJ is the exhaust duct, α4 is the exhaust fan, (
f) is the solvent recovery tower, (ln is the automatic opening/closing door, αη is the door winder, ■ is the separation between the solvent vapor tank and the solution tank,
Qυ is the foot switch for the automatic opening/closing door, (2) has a tray, +41. (51°a to α [with] and (to) are flow paths.

Claims (3)

[Claims] (1) In a method of cleaning articles by immersing them in an organic chlorine solvent with oil and fat attached to their surfaces, the article is loaded onto a traveling machine, and at the same time the article is pulled up to a predetermined position by the said traveling machine. The switch is turned on, the door of the device containing the organic chlorine solvent is automatically opened, the article is immersed in the vapor tank of the solvent by the traveling machine, and then the oil and fat adhering to the surface of the article is removed. After the article is kept in the vapor tank of the solvent for the required time using the traveling machine, it is moved in that position and immersed in a tank filled with the solvent above the level of the immersion liquid of the article, so that no residue remains on the surface of the article. After removing the oil and fat, the article is pulled up to a predetermined position by the traveling machine and transferred to the solution vapor tank in that position to remove the solvent attached to the surface of the article, and then the article is lifted by the traveling machine. The method is characterized in that the door is automatically closed as it is pulled up to a predetermined position, and the organic chlorine solvent discharged onto the door is operated by an exhaust fan for a required period of time to be sent to a recovery device and the discharged solvent is recovered. How to clean items. (2) As a heater for forming organic chlorine solvent vapor, when the article is not in the organochlorine solvent device, the temperature is lower than the boiling point of the organic chlorine solvent, and when the article is loaded onto the traveling machine, the above The switch on the door of the solvent equipment is turned on.
Claim No. 3 is characterized in that the heater is activated at the same time as the organic chlorine solvent is removed, forming a vapor tank of the organic chlorine solvent.
1) Method for cleaning articles described in section 1). (3) A tank containing the vapor of an organic chlorine solvent, a tank containing the organic chlorine solvent, a device for transporting articles in a device equipped with an open path above the tank containing the vapor of the above solvent, and a tank containing the organic chlorine solvent. an automatic opening/closing door device to prevent the volatilization of the solvent; a recovery device to recover the volatilized solvent; a heater to form organic chlorine solvent vapor;
An article washing device characterized by an automatic temperature control device for N-OFF control.