JP5430005B2 - Vibrator covering for ultrasonic cleaning bath - Google Patents

Description

The present invention relates to a coated body of the vibrator used in the ultrasonic cleaning tank, machine parts were immersed in the cleaning solution, the various cleaning object such as an electronic component, the object to be cleaned by applying ultrasonic vibrations It is intended to remove the attached cleaning waste.

  2. Description of the Related Art Conventionally, a method for cleaning an object to be cleaned that removes cleaning waste adhering to the object to be cleaned in a cleaning liquid using ultrasonic vibration is widely known. For example, as shown in Patent Document 1, an ultrasonic vibrator is disposed facing a cleaning tank having a flat bottom, and cleaning waste adhered to the object to be cleaned by applying ultrasonic vibration to the object to be cleaned in the cleaning tank. A method for peeling the film is known. Also, in the invention shown in Patent Document 2, similarly to the invention shown in Patent Document 1, an ultrasonic vibrator is arranged on the bottom of the cleaning tank whose surface is flat, and the ultrasonic vibration is applied to the object to be cleaned in the cleaning tank. The cleaning waste adhering to the object to be cleaned is peeled off.

JP 2004-82058 A JP 2001-310164 A

In the inventions described in Patent Documents 1 and 2, if ultrasonic cleaning is performed, cleaning waste adhering to the object to be cleaned is effectively peeled off by ultrasonic vibration. The separated cleaning waste falls to the bottom of the cleaning tank. However, the fallen cleaning waste is re-floated in the cleaning liquid by the output of the ultrasonic vibrator. This conventional example will be described with reference to FIG. 6 which is illustrated for ease of explanation . As shown in FIG. 6A , an object to be cleaned (2) is inserted into an ultrasonic cleaning tank (1) and ultrasonic waves are inserted. When ultrasonic cleaning is performed by transmitting ultrasonic vibration from the vibrator (3), the cleaning waste (4) peels off from the object to be cleaned (2) and floats in the cleaning liquid (5). When the ultrasonic vibrator (3) is stopped by the completion of the ultrasonic cleaning, as shown in FIG. 6B , the cleaning waste falls and accumulates on the lower bottom surface (6) of the ultrasonic cleaning tank (1).

Next, when the next object to be cleaned (2) is immersed in the cleaning liquid (5) and the ultrasonic vibrator (3) is operated, as shown in FIG. 6C , the object is separated from the object to be cleaned (2) by the previous cleaning. Then, the cleaning debris (4) falling and deposited on the lower bottom surface (6) of the ultrasonic cleaning tank (1) is re-floated by the output of the ultrasonic transducer (3). This re-floating cleaning waste (4) adheres again to the object to be cleaned (2) and prevents cleaning of the object to be cleaned (2). The more the ultrasonic cleaning of the object to be cleaned (2) is repeated with the same cleaning liquid (5), the more cleaning waste (4) floats in the cleaning liquid (5), and the object to be cleaned (2) is cleaned. It will be an obstacle. Further, since the contamination rate of the cleaning liquid (5) is increased as described above, the replacement frequency of the cleaning liquid (5) must be increased accordingly, and the running cost of cleaning is increased.

  Accordingly, the present invention is intended to solve the above-described problems, and cleaning waste that has been separated from an object to be cleaned by ultrasonic cleaning and dropped or deposited on the bottom bottom of the ultrasonic cleaning tank is It is possible to perform ultrasonic cleaning of an object to be cleaned repeatedly with a cleaning liquid with a low degree of contamination. As a result, it is possible to reduce the replacement frequency of the cleaning liquid and to reduce the running cost of cleaning. Moreover, it is intended to obtain such a technical effect at a low cost with a simple configuration.

This gun onset Ming to solve such problems described above, in which according to the covering body of the vibrator used in the ultrasonic cleaning tank. Then, the surface of the ultrasonic vibrator installed on the lower bottom surface of the ultrasonic cleaning tank is covered with a covering plate that can transmit the ultrasonic vibration while covering the surface of the ultrasonic vibrator with a certain distance, and this covering portion. The outer cover plate is bent downward and further bent parallel to the lower surface of the ultrasonic cleaning tank to form a mounting portion on the lower bottom surface, or a plate material formed separately from the cover plate is disposed. Accordingly, a cleaning waste storage portion is provided outside the coating portion so as to be recessed below the coating portion, and the ultrasonic vibration is not transmitted to the storage portion or is difficult to transmit compared to the coating portion. .

  When ultrasonic cleaning is performed by coating the ultrasonic transducer part of the existing ultrasonic cleaning tank with the coating body configured in this way, the cleaning liquid generates convection in the ultrasonic cleaning tank and is cleaned. Remove cleaning debris from objects. The separated cleaning debris floats in the cleaning liquid. The cleaning waste that has fallen into the storage part due to this floating convection is not easily transmitted by the storage part or compared to the covering part, and the storage part is a concave part. Since it becomes difficult to be affected, cleaning waste will not resurface or less. Moreover, although the cleaning debris that has fallen on the covering portion re-levitates by ultrasonic vibration, it does not fall and accumulate in the storage portion at a constant rate. By repeating the re-floating of the cleaning waste that has fallen on the covering portion a plurality of times, the cleaning waste in the cleaning liquid is remarkably reduced.

  The present invention is configured as described above, and it is also possible to use the ultrasonic transducer part of an existing ultrasonic cleaning tank that repeats re-floating of the cleaning waste with the covering part of the covering plate. In addition, an ultrasonic transducer part of a newly manufactured ultrasonic cleaning tank may be covered with a covering part of a covering plate. In this way, when ultrasonic cleaning is performed with the ultrasonic transducer part of the ultrasonic cleaning tank covered with the covering part of the covering plate, the cleaning waste is separated from the object to be cleaned by the ultrasonic vibration transmitted through the covering part. Floating convection in the cleaning solution.

  Among the cleaning waste that floats, the cleaning waste that has fallen into the storage part is not easily transmitted by the storage part as compared to the coated part, or is formed as a recess. It will be less susceptible to the effects of reflowing and will not resurface, and will accumulate in the storage. In addition, the cleaning waste that has fallen on the covering portion without falling on the storage portion re-levitates due to ultrasonic vibration, but does not fall and accumulate on the storage portion at a constant rate. By repeating the re-floating of the cleaning waste that has fallen on the covering portion a plurality of times, the cleaning waste is sequentially stored in the storage portion, and the cleaning waste in the cleaning liquid becomes extremely small. Therefore, even if the object to be cleaned is repeatedly ultrasonically cleaned with the same cleaning liquid, the amount of cleaning waste floating in the cleaning liquid is extremely small, and the reattachment of the cleaning waste to the target cleaning object can be prevented. The cleaning accuracy of the cleaning object can be improved. In addition, when cleaning waste is removed, the cleaning waste can be easily removed because it is concentrated in the storage unit.

1 is a conceptual diagram illustrating Example 1. FIG. The enlarged view of the accommodating part in Example 1. FIG. FIG. 6 is a conceptual diagram illustrating Example 2. FIG. 6 is a conceptual diagram illustrating Example 3; AA sectional drawing of Example 3. FIG. The conceptual diagram which shows a prior art example.

  Embodiment 1 of the present invention will be described in detail with reference to FIGS. 1 and 2. Reference numeral (10) denotes an ultrasonic cleaning tank, which is filled with a cleaning liquid (11) and a lid on the upper end via a packing (12). The body (13) is arranged so that the inside can be sealed. An ultrasonic transducer (14) is disposed at the lower end. The ultrasonic transducer (14) may be disposed on the entire bottom surface (16) of the ultrasonic cleaning tank (10), or may be disposed on a part of the bottom surface (16). Although the non-arranged portion (15) in which (14) is not disposed may be used, in this embodiment, the non-arranged portion (15) is formed on the outer periphery of the lower bottom surface (16).

  Further, the surface of the ultrasonic transducer (14) is covered with a coating plate (17) that can transmit ultrasonic vibration through the ultrasonic transducer (14) at a certain distance to form a coating portion (18). . This covering plate (17) is made of a material such as stainless steel, iron, titanium or the like in a plate shape having a thickness of 0.5 mm to 2 mm that can transmit ultrasonic vibration, and both sides of the covering portion (18) are subjected to ultrasonic cleaning. A side wall (21) having a height of 50 mm to 100 mm is provided by bending 90 degrees downward so as to provide a gap between the inner wall surface (20) of the tank (10), and the side wall (21) and the ultrasonic cleaning tank are provided. The space | interval with the inner wall surface (20) of (10) is made into the accommodating part (22) dented below with respect to the plane of the coating | coated part (18). Cleaning waste (23) is stored in the storage portion (22). Further, the side wall (21) is further bent in parallel with the lower bottom surface (16) of the ultrasonic cleaning tank (10) to form a mounting portion (25) on the lower bottom surface (16). This mounting portion (25) The upper surface is used as a storage portion (22). Further, in this embodiment, the ultrasonic transducer (14) is formed only on the lower surface of the covering portion (18), not on the lower surface of the mounting portion (25), and the mounting portion (25) and Ultrasonic vibration is not transmitted to the storage part (22) or is difficult to transmit compared to the covering part (18). Further, a liquid introduction port (26) is opened in the covering portion (18) so that the cleaning liquid (11) can easily enter the inside. Further, when the ultrasonic transducer (14) is disposed on the lower surface of the placement portion (25), that is, the lower portion of the storage portion (22), the formation thickness of the placement portion (25) is set to 4 mm or more. It is necessary to perform sonic blockage.

  In order to perform ultrasonic cleaning of the object (27) to be cleaned, the cleaning liquid (11) is filled in the ultrasonic cleaning tank (10), and the cleaning liquid (11) is filled with the cleaning liquid (11). The cleaning object (27) is put in and the ultrasonic vibrator (14) is operated. Due to the operation of the ultrasonic vibrator (14), the vibration transmitted from the ultrasonic vibrator (14) penetrates the covering portion (18) and is ultrasonically applied to the object to be cleaned (27) through the cleaning liquid (11). Add vibration. By this ultrasonic vibration, the filth adhering to the object to be cleaned (27) becomes cleaning waste (23) and is peeled off from the object to be cleaned (27) and floats in the cleaning liquid (11). Of the cleaning debris (23) floating and convection in the cleaning liquid (11), the cleaning debris (23) dropped and accumulated in the storage section (22) is not covered by the storage section (22) or transmits ultrasonic vibration. Compared to (18), it is difficult to transmit and the storage part (22) is a recess, so that it is not easily affected by the convection of the cleaning liquid (11), and the cleaning debris (23) rises again. There will be little or no.

  Of the cleaning debris (23) floating in convection in the cleaning liquid (11), the cleaning debris (23) falling on the covering portion (18) or floating convection resurfaces by ultrasonic vibration, but at a certain rate. It moves to the storage part (22) and does not fall and accumulate and re-float or re-float. As described above, the cleaning waste (23) that has fallen on the covering portion (18) is repeatedly levitated a plurality of times, so that the cleaning waste (23) is sequentially stored and deposited in the storage portion (22) and is not lifted again. Therefore, the amount of cleaning waste (23) in the cleaning liquid (11) is extremely small. For this reason, even if the object to be cleaned (27) is repeatedly subjected to ultrasonic cleaning with the same cleaning liquid (11), the cleaning waste (23) floating in the cleaning liquid (11) becomes extremely small, and the object to be cleaned (27). Therefore, it is possible to prevent the cleaning waste (23) from re-adhering to the object and improve the cleaning accuracy of the object (27) to be cleaned. Further, when the cleaning waste (23) is removed, the cleaning waste (23) can be easily removed because it is concentrated in the storage portion (22).

  In the first embodiment, the covering portion (18) is formed in parallel to the lower bottom surface (16) of the ultrasonic cleaning tank (10). In the second embodiment, as shown in FIG. One end of the covering portion (18) is inclined downward with respect to the lower bottom surface (16) of the ultrasonic cleaning tank (10). By forming in this way, the cleaning waste (23) that falls or convects on the covering portion (18) is moved in the direction of the storage portion (22) provided downward by the vibration of the covering plate (17) due to ultrasonic vibration. Guided and stored. Accordingly, in addition to the cleaning waste (23) levitated by the ultrasonic vibration being stored in the storage portion (22) by a normal drop, the cleaning waste (23) that falls or convects on the cover plate (17) is also stored. It is guided in the direction of the portion (22), and it is possible to increase the storage efficiency of the cleaning waste (23) in the storage portion (22).

In Example 3, a storage accumulation experiment of cleaning waste (23) in the storage portion (22) was performed using the ultrasonic cleaning tank (10), the covering portion (18), and the side wall (21) as shown in FIGS. It was. First, the size of the lower bottom surface (16) of the ultrasonic cleaning tank (10) was set to 1140 cm ² at 285 mm × 400 mm. Then, on the lower bottom surface (16), four sides of a stainless steel plate having a thickness of 1 mm were bent at a right angle downward with a width of 50 mm to form a side wall (21) having a height of 50 mm on the outer periphery of the covering portion (18). And in the bending formation state of this side wall (21), a coating | coated part (18) is 280 mm x 335 mm, and a surface area is 938 cm < ² >. When the covering portion (18) is set on the lower bottom surface (16) of the ultrasonic cleaning tank (10), the left and right side walls (21) of the covering portion (18) and the inner surface of the ultrasonic cleaning tank (10). And a storage portion (22) for the cleaning waste (23) is formed at substantially equal intervals, and the front and rear side edges of the covering portion (18) are formed on the inner surface of the ultrasonic cleaning tank (10). It is formed to the size to adhere.

  The ultrasonic vibrator (14) is disposed on the lower bottom surface (16) of the ultrasonic cleaning tank (10) only at a position corresponding to the lower surface of the covering portion (18), and the storage portion (22). Is not arranged. Further, a stainless steel plate material (28) having a thickness of 10 mm was disposed on the entire surface of the storage portion (22). Since the ultrasonic vibration cannot transmit a stainless material having a thickness of 4 to 6 mm or more, the ultrasonic vibrator on the lower surface of the covering portion (18) can be obtained by arranging the plate material (28) in the storage portion (22). Even when the ultrasonic vibration from (14) leaks to the storage section (22) side, the cleaning waste (23) accumulated in the storage section (22) is not affected by re-floating.

  Then, 18 liters of a hydrocarbon-based solvent is charged as the cleaning liquid (11) into the ultrasonic cleaning tank (10). Further, 19.7 g of an aluminum cutting chip having a diameter of about 1 mm as a cleaning waste (23) was put into the cleaning liquid (11) on the surface of the covering portion (18). Next, when the ultrasonic vibrator (14) is operated, the cleaning waste (23) starts floating convection from the surface of the covering portion (18), and the cleaning waste (23) floating convection to the storage portion (22) side is It does not fall and accumulate again in the storage part (22). By continuing to operate the ultrasonic vibrator (14), the cleaning waste (23) floating and convection on the storage unit (22) side does not fall and accumulate in the storage unit (22), and thus the cleaning liquid ( 11) The cleaning waste (23) in the inside decreased rapidly. The ultrasonic transducer (14) was turned on for 60 minutes. Next, the cleaning liquid (11) is slowly withdrawn from the lower bottom surface (16) of the ultrasonic cleaning tank (10) so as not to affect the covering portion (18), and the cleaning debris (23) deposited on the covering portion (18). The amount of was measured. The mass of the cleaning waste (23) was 0.4601 g.

If cleaning debris 19.7g charged into the ultrasonic cleaning tank (10) (23) is the average fall deposited area of 1140 cm ^2, per unit area (1 cm ²⁾ per 17.3mg cleaning debris (23) Will accumulate. In Experiments with this embodiment contrast, the deposition amount of surface area per unit area because a 938cm ² of the cover portion (18) (1 cm ²⁾ per wash debris (23) is 0.49 mg. Further, 2.33% of the charged cleaning waste (23) remains in the covering portion (18), and 97.66% of the cleaning waste (23) is stored in the storage portion (22).

DESCRIPTION OF SYMBOLS 10 Ultrasonic cleaning tank 14 Ultrasonic vibrator 16 Lower bottom surface 17 Cover plate 18 Cover part 22 Storage part 23 Cleaning waste 25 Placement part 28 Plate material

Claims (1)

The surface of the ultrasonic transducer which is placed under the bottom of the ultrasonic cleaning tank, the cover portion is provided with a coating plate capable of transmitting ultrasonic vibration with covering over a certain distance between the transducer, outside of the covering portion The cover plate is bent downward and further bent in parallel with the lower surface of the ultrasonic cleaning tank to form a mounting portion on the lower bottom surface, or by arranging a plate material formed separately from the cover plate A cleaning waste storage portion is provided outside the coating portion so as to be recessed below the coating portion. Ultrasonic vibration is not transmitted to the storage portion or is difficult to transmit compared to the coating portion. A covering for a vibrator used in an ultrasonic cleaning tank.