JP4340797B2 - Ultrasonic cleaning equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ultrasonic cleaning apparatus for cleaning an object to be cleaned such as a silk screen plate and a metal plate with ultrasonic waves.
[0002]
[Prior art]
Conventionally, a method of printing a cream solder or an adhesive for component bonding on a printed wiring board using a silk screen printing method has been widely used. As the silk screen plate and metal plate, a plate made of a chemical fiber fabric or a metal plate such as stainless steel or nickel plate is used. For example, when cream solder is printed on a printed wiring board using this method, the plate becomes clogged with the evaporating of the solvent of the cream solder over time, and the desired print quality cannot be obtained. Further, when printing an epoxy-based adhesive on a printed wiring board or the like, there is a problem that the plate is clogged within a short time because the pot life is short. Therefore, the plate used for such printing needs to be washed and dried every predetermined time.
[0003]
Hereinafter, a conventional ultrasonic cleaning apparatus will be described with reference to a side sectional view of FIG. A cleaning tank 102, which is a diaphragm, is fixed to the upper portion of the casing 101, and holes 104 of a plurality of angles 103 fixed to the bottom surface thereof by welding or the like are provided in horns 106 of a plurality of ultrasonic transducers 105, respectively. The bolts 108 are used to fix the screw holes 107. Within the housing 101 is an ultrasonic oscillator 109 that supplies the ultrasonic transducer 105.
[0004]
Next, the operation will be described. When the cleaning tank 110 is filled with the cleaning liquid 110 and the ultrasonic oscillator 109 is oscillated, the ultrasonic vibrator 105 vibrates to vibrate the cleaning liquid 110 through the cleaning tank 102 and the string 111 causes the cleaning liquid to vibrate. The dirt of the object to be cleaned 112 suspended in 110 is cleaned.
[0005]
[Problems to be solved by the invention]
However, in the conventional ultrasonic cleaning apparatus as described above, a large amount of cleaning liquid is required because the container for cleaning is large, and since application of ultrasonic vibration is performed through a large amount of cleaning liquid, it is necessary to vibrate a large amount of cleaning liquid. In addition, since the cleaning tank is fixed to the housing, a large amount of power is required to drive the ultrasonic vibrator, and cleaning may not be possible depending on the type of ink.
[0006]
The present invention has been made to solve such a conventional problem, and is easy to operate so as not to immerse the object to be cleaned in the cleaning liquid, so that the amount of the cleaning liquid is small, and the power may be small. Therefore, an ultrasonic cleaning apparatus that can shorten the cleaning time is provided.
[0007]
[Means for Solving the Problems]
In order to solve the above-described conventional problems, an ultrasonic cleaning apparatus according to the present invention includes, in claim 1, a planar diaphragm mounted with a vibrator and suspended substantially vertically by an upper support point, and a planar surface. a cleaning liquid flow down means for flowing down the object to be cleaned, the cleaning liquid during cleaning the gap between the diaphragm and the object to be cleaned which is arranged opposite to substantially kept parallel to and minute gap diaphragm Te, a diaphragm to be It is the structure provided with the air injection | pouring means which inject | pours an air flow at the time of washing | cleaning to the clearance gap between cleaning objects.
[0008]
With this configuration, since the diaphragm is separated from the housing, it is easy to vibrate, and it is not necessary to give a large power to the vibrator. Therefore, the ultrasonic oscillator can be small, and the ultrasonic vibrator can be made small. And the number is small. In addition, the diaphragm is suspended and the cleaning liquid is allowed to flow into the gap between the object to be cleaned and the diaphragm by the cleaning liquid flowing means, so that only a small amount of cleaning liquid is required, and air is also injected. The effect of being able to be obtained is obtained.
[0009]
Next, in the ultrasonic cleaning apparatus according to claim 2, in addition to the first aspect, the second cleaning liquid flowing down means to flow down the cleaning liquid during cleaning the opposite side of the diaphragm and the opposing surfaces of the object to be cleaned And a second air injecting means for injecting an air flow at the time of cleaning on the surface opposite to the surface facing the diaphragm of the object to be cleaned. The effect of accelerating cleaning is further promoted by allowing the cleaning liquid to flow down to the surface opposite to the surface to be cleaned and also injecting an air flow.
[0010]
Next, in the ultrasonic cleaning apparatus according to claim 3, in the configuration according to claim 1 or 2, the cleaning liquid flow down means and the air flow injection means operate alternately and intermittently. In the apparatus, the air flow injection means is intermittently operated during the operation of the cleaning liquid flow down means, and the effect of speeding up the cleaning is further promoted.
[0011]
Next, an ultrasonic cleaning apparatus according to a fifth aspect is the structure according to the first to fourth aspects, wherein the object to be cleaned is suspended substantially vertically by an upper support point, whereby the object to be cleaned can be easily installed. Become.
[0012]
Next, an ultrasonic cleaning apparatus according to a sixth aspect of the present invention is the ultrasonic cleaning apparatus according to any one of the first to fifth aspects, wherein the diaphragm is suspended so that the lower end of the diaphragm approaches the object to be cleaned. Can be provided between the two.
[0013]
Next, an ultrasonic cleaning apparatus according to a seventh aspect of the present invention is the ultrasonic cleaning apparatus according to any one of the first to sixth aspects, wherein the diaphragm is provided with a protrusion and a predetermined gap is provided between the vibration object and the object to be cleaned. It is easy to install and an appropriate gap can be provided between them.
[0014]
Further, the ultrasonic cleaning apparatus according to claim 8 is the size of the structure according to claim 5, wherein the object to be cleaned is a plate having a plate frame, and an upper support point is provided with a comb-like notch to avoid the plate frame. Can support different versions of
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an ultrasonic cleaning apparatus of the present invention will be described with reference to the drawings. 1 is a side sectional view of an ultrasonic cleaning apparatus according to an embodiment of the present invention, FIG. 2 is also a front view thereof, FIG. 3 (a) is a front view of essential parts thereof, (b) is a bottom view thereof, and FIG. Fig. 5A is a side view of the main part, Fig. 5 (a) is an explanatory view of the state of dirt around the plate during cleaning, and Fig. 5 (b) is an explanatory view of the state where the stain around the plate is also removed when air is blown out. .
[0016]
A door 3 is attached to the front surface of the housing 1 so as to be opened and closed with a door hinge 5 and the door 3 is opened with a handle 7 so that the object to be cleaned can be replaced and maintained. Further, the lower door 9 is attached so as to be opened and closed with a door hinge 11, and the door 9 can be opened and closed with a handle 13.
[0017]
A plate hanging angle 17 is provided in the left and right direction when viewed from the front above the housing 1 and in front of the back plate 15. The plate hanging angle 17 has two left and right plate holding plate rotations as shown in FIG. A plate holding plate 21 is pivotally attached to a direction away from the back plate 15 by a fulcrum 19. As shown in FIG. 4, the plate holding plate 21 is bent toward the rear of the housing 1 so as to be hung by hanging the plate frame 25 of the plate 23 to form a plate hooking angle 26. In addition, a liquid escape hole 27 is provided to allow the cleaning liquid or the like accumulated in the bent portion to escape.
[0018]
As shown in FIG. 3B, the plate hooking angle 26 is provided with notches 26a to 26d so as to have a comb-teeth shape, and the plate frame 25 is hooked on the remaining portion of the notch. When the large plate is hung, the plate frame is released by the notches 26a and 26b. When the small plate is hung, if the plate frame is released by the notches 26c and 26d, plates of different sizes can be placed. it can. The number of comb notches may be determined according to the type of plate size. In this embodiment, the iron plate of the angle 26 is cut out to form a comb-teeth shape, but a round bar or the like may be provided on the angle at a certain interval to form a comb-teeth shape.
[0019]
A diaphragm 33 to which one or a plurality of ultrasonic transducers 31 are attached is suspended from two or more diaphragm suspension hooks 29 on the ceiling of the housing 1. An appropriate number of space setting dowels 35 having a height of about 1 mm are provided on the surface of the diaphragm 33 facing the plate 23.
[0020]
The plate holding plate 21 is provided with two sets of upper and lower pipe holding brackets 37.39, and each of the first air pipe 41, the second air pipe 43, and the first cleaning liquid pipe 45 provided with a large number of pores. The second cleaning liquid pipe 47 is held on the left and right. The widths of the air pipes 41 and 43 and the cleaning liquid pipes 45 and 47 where the pores are provided are slightly wider than the width of the plate 23. These pipes are connected to an air solenoid valve 49 and a cleaning liquid pump 51 by tubes. The cleaning liquid is supplied from the cleaning liquid tank 53 to the cleaning liquid pump 51. The air solenoid valve 49 is supplied with compressed air from a compressor of factory equipment outside the apparatus.
[0021]
A tray 55 is placed at the bottom of the space surrounded by the side wall of the housing 1, the door 3, and the back plate 15. The cleaning liquid or the rinsing liquid scattered in the space is collected by the tray 55, and the waste liquid tank 59 is collected by the drain 57. To the settling tank 61. The output of the ultrasonic oscillator 63 placed in the housing 1 is connected to the ultrasonic transducer 31.
[0022]
Although configured as described above, the operation will be described by taking as an example the case of cleaning a metal mask on which cream solder is printed. The door 3 in front of the housing 1 is opened with the handle 7 and the plate holding plate 21 is rotated forward. Then, when the plate holding plate 21 is returned to the original position while the plate frame 25 of the plate 23 is hooked on the plate hooking angle 26 below the plate holding plate 21 as shown in FIG. 4, a slight gap is formed between the plate 23 and the vibration plate 33. Keep it facing each other. Since it is difficult to make both of them completely parallel, the lower side of the diaphragm 33 is brought closer to the surface of the plate 23.
[0023]
Specifically, since the ultrasonic transducer is attached to the upper right side of FIG. 4, the diaphragm 33 is clockwise so that the lower side of the diaphragm 33 approaches the surface of the plate 23 from the relationship between the suspension point and the center of gravity. The moment of rotation is received. Therefore, the suspension point is examined and adjusted so that the lower end of the diaphragm 33 does not contact the lower side of the plate 23 too strongly. For this purpose, it is also necessary to adjust the suspension point by bending the upper portion of the diaphragm 33 into a complicated shape. In addition, an appropriate gap between the diaphragm 33 and the plate 23 is set by the space setting dowel 35.
[0024]
When the plate 23 can be installed, the cleaning liquid pump 51 is driven to cause the cleaning liquid to flow down from the pores of the cleaning liquid pipe 45 through the tube between the plate 23 and the diaphragm 33, and from the pores of the cleaning liquid pipe 47 to the plate 23. The cleaning liquid is caused to flow down toward the surface opposite to the diaphragm 33, and at the same time, the ultrasonic oscillator 63 is oscillated, and the ultrasonic vibrator 31 is driven to ultrasonically vibrate the diaphragm 33. At this time, even if the lower part of the vibration plate 33 is in light contact with the plate 23, the cleaning liquid flows down and the space is spread to act as a film of the cleaning liquid on the surface of the plate 23.
[0025]
After a predetermined short time, the cleaning liquid pump 51 is stopped, and instead, the air electromagnetic valve 49 is driven to blow out air from the pores of the air pipes 41 and 43. At the time of cleaning with only the cleaning liquid, as shown in FIG. 5A, the solder particles 65 that have received ultrasonic waves from the vibration plate 33 and peeled off from the plate 23 cannot rotate out of the vortex of the cleaning solution 66 and escape from the vortex. Although it does not flow down from the periphery, it takes time to clean, but as shown in FIG. 5B, when the air bubbles 67 are blown out, the air bubbles 67 enter the cleaning liquid 66 so that the ultrasonic vibrations are partially blocked at the bubbles 67. As a result, the vortex of the cleaning liquid disappears and the solder particles 65 fall faster, so that the cleaning becomes faster. In the experiment, cleaning was completed in about one-third of the time when no air was blown.
[0026]
Here, the cleaning liquid and the air are alternately output, but the same effect can be obtained even if the air is blown intermittently while the cleaning liquid is continuously supplied.
Instead of alternately or intermittently driving the cleaning liquid pump 51 and the air electromagnetic valve 49, a valve may be provided in the middle to control the cleaning liquid and air.
[0027]
After washing with the washing liquid, the rinsing liquid (which has the same components as the washing liquid but has no dirt, which is a washing liquid in a broad sense) is flowed down to finish. After the rinsing, if the ultrasonic vibrator 31 is driven without flowing the rinsing liquid and the cleaning liquid, the plate 23 can be dried by the vibration and heat generation effect.
[0028]
As described above, in this embodiment, the planar diaphragm is suspended substantially vertically, the plate is disposed substantially parallel to the diaphragm, and the cleaning liquid or the rinsing liquid is allowed to flow down in the gap to perform cleaning or rinsing. By doing this, it is possible to reduce the amount of the cleaning liquid and the power of the ultrasonic wave, and it is possible to perform cleaning in a short time by blowing air into the cleaning liquid alternately or intermittently. Further, this effect can be promoted by causing the cleaning liquid to flow down on the surface opposite to the surface facing the diaphragm of the plate and blowing air alternately or intermittently with the cleaning liquid.
[0029]
Furthermore, by making the lower part of the vibration plate or the vibration plate and the reflecting plate lightly contact the plate with respect to the plate, the mutual gap can be easily adjusted, and the liquid itself is optimal during washing or rinsing. It can be kept in the gap. Further, an optimum gap can be maintained by providing a protrusion on the diaphragm. As described above, it is effective to employ any of the above-described configurations or to use them in combination.
[0030]
In the above-described embodiment, details such as a method of suspending a plate, a diaphragm, a cleaning liquid pipe, an air pipe, and the like are examples, and other configurations may be used as long as they perform the same function. Further, for example, the object to be cleaned may be fixed vertically and not suspended.
[0031]
【The invention's effect】
As described above, the ultrasonic cleaning apparatus according to the present invention has the configuration according to claim 1 or 2, and the vibration plate is separated from the casing, so that it is easy to vibrate and does not need to give a large power to the vibrator. The oscillator may be small, the ultrasonic transducer is small, and the number is small. In addition, since the diaphragm is suspended and the cleaning liquid flows down to the gap between the object to be cleaned and the diaphragm by the cleaning liquid flow means, a small amount of cleaning liquid is required, and air is also injected. An advantageous effect such as being possible is obtained.
[0032]
Further, according to the configuration of claims 3 and 4, air bubbles enter the vortex of the cleaning liquid and partially block the transmission of ultrasonic vibration, so that the cleaning debris mixed with the cleaning liquid can easily flow down with the cleaning liquid and shorten the cleaning time. it can.
[0033]
Further, in the configuration of claim 5, the object to be cleaned can be easily installed, and in the structures of claims 6 and 7, in addition to this, an appropriate gap can be provided between the object to be cleaned and the diaphragm. Further, according to the configuration of claim 8, there is an effect that it is possible to cope with a plurality of types of sizes.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an ultrasonic cleaning apparatus according to an embodiment of the present invention. FIG. 2 is a front view thereof. FIG. 3 (a) is a front view of essential parts thereof. Similarly, FIG. 5 is a side view of the main part. FIG. 5A is an explanatory diagram of the state of dirt around the plate during cleaning. FIG. 6B is an explanatory diagram of the state in which the dirt around the plate is removed when air is blown. Cross-sectional view of the ultrasonic cleaning equipment
DESCRIPTION OF SYMBOLS 1 Case 3, 9 Door 7, 13 Handle 15 Back plate 17 Plate hanging angle 21 Plate holding plate 23 Plate 25 Plate frame 26 Plate hooking angle 26a-26d Notch 29 Vibration plate hanging hook 31 Ultrasonic vibrator 33 Vibration Plate 35 Space setting dowel 37 First pipe holding bracket 39 Second pipe holding bracket 41 First air pipe 43 Second air pipe 45 First cleaning liquid pipe 47 Second cleaning liquid pipe 49 Solenoid valve 51 Pump 53 Cleaning liquid Tank 59 Waste liquid tank

Claims (8)

A planar diaphragm mounted with a vibrator and suspended substantially vertically by an upper support point;
An object to be cleaned which is a flat surface and is substantially parallel to the diaphragm and facing the diaphragm with a small gap;
A cleaning liquid flowing means for flowing a cleaning liquid into the gap between the vibration plate and the object to be cleaned at the time of cleaning;
An ultrasonic cleaning apparatus comprising air injection means for injecting an air flow into the gap between the vibration plate and the object to be cleaned during cleaning. A second cleaning solution flows down means to flow down the cleaning liquid during cleaning the opposite side of the diaphragm and the opposing surfaces of the object to be cleaned,
Wherein the diaphragm surface facing the ultrasonic cleaning apparatus of claim 1, further comprising a second air injection means for injecting an air flow during cleaning the opposite side of the object to be cleaned.   The ultrasonic cleaning apparatus according to claim 1 or 2, wherein the cleaning liquid flow down means and the air flow injection means operate alternately and intermittently.   The ultrasonic cleaning apparatus according to claim 1 or 2, wherein the air flow injection means is operated intermittently during the operation of the cleaning liquid flow means.   The ultrasonic cleaning apparatus according to claim 1, wherein the object to be cleaned is suspended substantially vertically by an upper support point.   The ultrasonic cleaning apparatus according to any one of claims 1 to 5, wherein the diaphragm is suspended so that a lower end thereof approaches the object to be cleaned.   The ultrasonic cleaning apparatus according to claim 1, wherein a protrusion is provided on the diaphragm and a predetermined gap is provided between the protrusion and the object to be cleaned. The object to be cleaned is a plate having a plate frame,
6. The ultrasonic cleaning apparatus according to claim 5, wherein an upper support point is provided with a comb-like notch that avoids the plate frame to support plates of different sizes.

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