JP3303119B2 - Ultrasonic cleaning method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial application] Degreasing and cleaning of processed parts such as metal and resin.

[0002]

2. Description of the Related Art Degreasing cleaning has been performed by combining the chemical action of a cleaning agent such as a fluorine-based or chlorine-based solvent, a hydrocarbon-based solvent, or a water-soluble detergent with physical force such as ultrasonic waves. Cleaning agents destroy the ozone layer, damage health, prevent disasters,
There were many problems in rinsing water regeneration, etc., and therefore a great burden was imposed on the economy.

[0003]

The object of the present invention is to reduce various problems and burdens caused by using a cleaning agent as much as possible by performing degreasing cleaning only with water.

[0004]

Means for Solving the Problems A machined part whose surface is contaminated with oil is immersed in water to which ultrasonic waves are applied, and the oil film surface is emulsified so that it can be easily separated. Is removed from the oil film surface, the exposed oil film surface is emulsified and separated again, and degreasing is performed.

[0005]

By immersing a machined part whose surface is contaminated with oil in water to which ultrasonic waves are applied, the contact surface between the oil film surface and water is emulsified. The oil film covered by the emulsified layer has a very small chance of contact with water, and the growth of the emulsified layer is significantly slowed down even when the application of ultrasonic waves is continued. This emulsified layer is hydrophilic and easily released from the oil film surface. Fluid is sprayed at a high speed on the oil film surface to separate it from the oil film surface. As a result, the oil surface under the emulsified layer is exposed.

[0006]

1 shows an example of an ultrasonic cleaning method and apparatus according to the present invention. The ultrasonic vibrator (2) is driven by an ultrasonic oscillator (not shown) and applies ultrasonic vibration to the cleaning water (3) in the cleaning layer (4). A high-speed fluid (6) flows out from a high-speed flow generator (not shown) through a nozzle (5) to immerse the machined part (1) contaminated with oil therein to emulsify the oil surface, and move the nozzle (5). The emulsified layer on the surface is released by spraying the processed part (1) while moving as shown by the line (7). As a result, the oil film below the emulsified layer is exposed. Performs degreasing and washing. The separated emulsion is discharged from the outlet (10) to the outside of the system, flows through an oil / water separator (not shown), and flows back from the inlet (9). Fig. 2 Processing part (1) contaminated with oil
An example of a method of emulsifying the surface of the above, taking out from the washing water, and spraying a high-speed fluid in the air to separate the emulsified layer will be described.

[0007]

According to the present invention, degreasing can be performed only with water without using a cleaning agent, thereby eliminating the adverse effects of using a cleaning agent. Specifically, for fluorine-based and chlorine-based solvents, destruction of the ozone layer, global warming, installation of equipment for controlling and recovering evaporated gas, and for hydrocarbon-based solvents, fire and ignition disaster prevention equipment are required. In addition, there is no need to worry about contamination of the working environment due to the vaporized gas. The water-soluble detergent eliminates the need for a large amount of rinse water recycling and recycling equipment. Regenerating oily water is better than regenerating detergent and oily water.
It is much easier and the equipment is smaller and cheaper. The washing equipment is simple and small, and the installation space and the cost of equipment, operation and maintenance are also advantageous.

[Brief description of the drawings]

FIG. 1 shows an example of an ultrasonic cleaning method and apparatus according to the present invention, in which an emulsified layer is released in cleaning water.

FIG. 2 shows an example of an ultrasonic cleaning method and apparatus according to the present invention, in which an emulsified layer is released in the air.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Processing part (cleaning object) 6 ... High-speed fluid 2 ... Ultrasonic vibrator 7 ... Nozzle flow line 3 ... Cleaning water 8 ... Processing part (cleaning object) Flow line 4 ・ ・ ・ Washing tank 9 ・ ・ ・ Inlet 5 ・ ・ ・ Nozzle 10 ・ ・ ・ Outlet

Claims (1)

(57) [Claims] An ultrasonic cleaning method for degreasing and cleaning a machined part whose surface is contaminated with oil without using a solvent or a cleaning agent such as a detergent, comprising: a cleaning tank for storing cleaning water; An ultrasonic cleaning device comprising an ultrasonic generator for applying ultrasonic waves to the cleaning water to emulsify the contaminated oil and a high-speed flow generator for separating the emulsified layer.