JPH07100449A - Method and device for removing adherent matter by ultrasonic vibration - Google Patents

Abstract

PURPOSE:To provide an inexpensive removing method and an inexpensive removing device of dry type which can remove effectively an adherent matter such as swarf adhering to an inner wall face of a hollow body and which eliminate various problems generated following the conventional wet cleaning methods. CONSTITUTION:A hollow body such as a glass tube GT with at least one opening is ultrasonic vibrated by an ultrasonic vibrator 1 or the like, and an adhered matter such as glass chips (fine powder) separated of the inner wall face of the hollow body by a discharge means such as an air nozzle 2 is discharged to the outside through at least one opening. As a suitable working example, a carrying means such as a belt conveyor 3 for feeding in and out successively hollow bodies into a working space in which the discharge of adherent matter separated off and the ultrasonic vibration are executed, is installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for removing deposits used when removing chips from the inside of a glass tube, and more particularly to a removal rate using ultrasonic vibration. The present invention relates to a removing method and apparatus for improving the above.

[0002]

2. Description of the Related Art In glass factories, long glass tubes are prepared in advance, and these tubes are cut into a predetermined length according to a predetermined standard or a user's request before shipment. The cutting of this glass tube is usually done automatically in the form of line work. That is, a cutting machine that cuts the end of the glass tube along a transportation path such as a belt conveyor,
An annealing machine for the cut surface is arranged, and a large number of glass tubes are sequentially cut into a predetermined length, and then the cut surface is annealed.
Since the chips (fine glass powder) generated during cutting remain inside the glass tube thus obtained, it is necessary to remove them. Conventionally, such a chip removing operation is performed by immersing a glass tube in an ultrasonic cleaning tank filled with water or an organic solvent.

[0003]

The above-mentioned wet ultrasonic cleaning method using water or an organic solvent has a problem that the cleaning tank becomes large and the equipment cost increases as the glass tube to be cleaned becomes longer. Also, in a hollow body with a small number of openings and a complicated shape, such as a cathode ray tube for television,
Not only is it difficult for the cleaning liquid to enter the cavities, but it also takes a long time to dry after cleaning. Therefore, it is an object of the present invention to provide an inexpensive removal method and device capable of removing deposits such as chips adhering to the inner wall surface of a hollow body such as a glass tube with a practically necessary efficiency. .

[0004]

According to the method and apparatus for removing deposits according to the present invention, a hollow body such as a glass tube having at least one opening is ultrasonically vibrated and is detached from the inner wall surface of the hollow body. The kimono is configured to be discharged to the outside through at least one of the openings. According to a preferred embodiment of the present invention, the deposits released from the inner wall surface are discharged by an air flow flowing into at least one of the openings into the hollow body and discharged from the other openings to the outside.

[0005]

According to the present invention, ultrasonic energy is directly applied to a hollow body such as a glass tube by pressing the tip of a horn of an ultrasonic vibration device against the outer wall surface of the hollow body without interposing a medium such as a cleaning liquid. Is transmitted. As a result, the hollow body vibrates violently, and deposits such as chips attached to the inner wall surface are released from the inner wall surface. The detached deposits are discharged to the outside of the tube by the air flow injected from the nozzle toward the inside of the hollow body such as the glass tube. For a hollow body with only one opening, such as a cathode ray tube,
By ultrasonically vibrating the opening with the opening facing downward, the loose substance is discharged by spontaneous falling. Hereinafter, the present invention will be described in more detail with reference to Examples.

[0006]

1 and 2 are a front view and a side view showing the construction of a removing apparatus for realizing a method for removing deposits on an inner wall surface by ultrasonic vibration according to an embodiment of the present invention. 1 and 2, 1 is an ultrasonic vibrator, 2 is an air nozzle, 3 is a conveying device, and GT is a glass tube to be treated. The ultrasonic vibrator 1 includes a Langevin-type ultrasonic vibrator 10 and a power supply unit 20, and the Langevin-type ultrasonic vibrator 10 is provided.
Is a piezoelectric ceramic 11, a cone 12, a horn 13,
It is composed of a flange 14, a case 15, a cable 16 and the like.

The piezoelectric ceramics 11 of the Langevin type ultrasonic transducer 10 receives the AC power in the ultrasonic frequency band of about 20 KHz from the power source section 20 via the cable 16.
It vibrates in the thickness direction. This ultrasonic vibration is the cone 1
It propagates through the horn 13 toward the tip through the horn 13.
A flange 14 formed at a node of the ultrasonic vibration of the cone 12 is attached to the case 15. Transport device 3
Is composed of a belt 3a and a U-shaped metal fitting 3b fixed thereon. The glass tube GT held by the U-shaped metal fitting 3b is cut into a predetermined length by a cutting machine (not shown) arranged along the path of the belt conveyor, and the cut surface is an annealing machine (not shown). ), It is conveyed in the direction perpendicular to the paper surface in FIG. 1 and in the left-right direction in the paper surface in FIG.

The tip of the horn 13 of the ultrasonic transducer 10 is positioned at a position slightly higher than the U-shaped metal fitting 3b. Therefore, as shown by the dotted line in FIG. 2, the ultrasonic transducer 10 is provided at the central portion of the glass tube GT that has been conveyed to the installation location of the ultrasonic vibrator 1 after being cut and cut.
It hits the tip of the horn 13 and rides on it. As a result, the glass tube GT is simply supported by one of the left and right U fittings 3b and the tip of the horn 13, and is kept in contact with the tip of the horn 13 by the contact pressure of the weight of the glass tube. While starting ultrasonic vibration in the vertical direction. With this ultrasonic vibration in the vertical direction, the glass tube G
The glass chips attached to the inner wall surface of T are released from the inner wall surface. As shown in FIG. 2, the tip of the horn 13 is
In order to increase the contact time with the glass tube GT, it has an elongated shape that is long in the transport path direction.

One or an appropriate number of air nozzles 2 are installed in the vicinity of the ultrasonic vibrating machine 1, and the air jets jetted from them are blown into the glass tube GT through one opening thereof. Then, it passes through the inside of the pipe and is ejected outside the pipe from the other opening. The chips separated from the inner wall surface by the ultrasonic vibration are discharged to the outside of the glass tube by the air jet.

FIG. 3 shows the structure of an adhering matter removing device for removing chips adhering to the inner wall surface of the cathode ray tube BT. 13 is a horn of Langevin type ultrasonic transducer similar to that of FIG. 1, 33 and 34 are cathode ray tubes BT.
Is a conveyance mechanism such as a belt that conveys in the direction perpendicular to the paper surface while holding the opening downward. The tip of the horn 13 of the ultrasonic transducer is pressed against the outer wall surface of the cathode ray tube BT from right beside with an appropriate contact pressure. In this case, the chips released from the inner wall surface of the cathode ray tube BT are discharged to the outside from the opening by spontaneous fall.

The removal method and apparatus of the present invention have been described above by taking the case where the fine glass powder generated by cutting the glass tube and adhering to the inner wall surface is removed by the dry cleaning method in combination with the air jet. However,
INDUSTRIAL APPLICABILITY The removal method and apparatus of the present invention can be applied to the purpose of removing not only fine glass powder but also other various kinds of adhered matters such as dust, soot, and mud adhered to the inner wall surface of a glass tube by a dry cleaning method.

Although a glass tube or a cathode ray tube is exemplified as the hollow body, the method and apparatus of the present invention can be applied for the purpose of removing deposits from the inner wall surface of another appropriate hollow body such as a resin or ceramic tube.

Further, the present invention has been described by taking the method of removing the deposits from the inner wall surface of the hollow body as an example. However, the removing method of the present invention can also be applied to the case of removing adhered matters such as glass chips adhering to the surface of plate glass or bar glass.

[0014]

As described above in detail, according to the removing method of the present invention, the hollow body or the like is vibrated by ultrasonic waves, and the adhered matter released from the inner wall surface of the hollow body is blown through at least one of the openings by an air jet or an air jet. Since the dry cleaning method of discharging to the outside by natural fall is adopted, there is an effect that the equipment cost is lower and the installation area of the device is reduced as compared with the conventional wet cleaning method.

Chip removal rate when an air jet is blown onto a glass tube while ultrasonically vibrating, and chips when only an air jet is blown without performing such ultrasonic vibrating Was measured. However, the vibration frequency is 19.5 KHz and the vibration amplitude at the tip of the horn 13 is 1
0 to 20 μmp-p, and the vibration time is 3 seconds. Further, the glass tube was stationary without being conveyed, and the air jet was configured to continuously blow air from one air nozzle. The particle size of the glass chips (fine powder) is 40
μm to 2000 μm. The results are shown in the table below.

[0016]

The following facts are found from the above experimental results. (1) The removal rate decreases as the glass tube becomes elongated,
The effect of improving the removal rate by the combined use of ultrasonic vibration becomes remarkable. (2) By using ultrasonic vibration in combination, a removal rate of 80% or more, which is a practical target value, can be achieved except for the case of the longest slender shape. It should be noted that there is room for further improvement of the removal rate by adopting a configuration in which a strong air jet is jetted in a pulse shape instead of continuously blowing the air jet.

Further, since the removal method of the present invention is a dry cleaning method, there is an advantage in that, unlike the conventional wet cleaning method, a waiting time until the cleaning liquid is dried is unnecessary and the working time is shortened.

Further, unlike the conventional wet cleaning method, the removal method of the present invention eliminates the labor and cost for discarding the waste liquid after cleaning, particularly the harmful organic solvent, thus reducing the processing cost. There is also an advantage.

Further, unlike the conventional wet cleaning method, the removing method of the present invention transfers ultrasonic vibration energy directly to the hollow body without interposing the cleaning liquid, so that power efficiency is improved and power consumption is reduced. Processing time is reduced. This reduction in processing time and reduction in installation area makes it possible to incorporate the entire apparatus into a line for line work.

[Brief description of drawings]

FIG. 1 is a front view showing a configuration of an apparatus for realizing a method for removing deposits on an inner wall surface by ultrasonic vibration according to an embodiment of the present invention.

2 is a side view of the device of FIG. 1. FIG.

FIG. 3 is a front view showing a configuration of an apparatus for realizing a method for removing deposits on an inner wall surface by ultrasonic vibration according to another embodiment of the present invention.

[Explanation of symbols]

 1 Ultrasonic shaker 10 Langevin type ultrasonic vibrator 13 Horn 20 Power supply section 2 Air nozzle 3 Transport mechanism 3a Belt 3b U-shaped metal fitting GT glass tube

Claims (9)

[Claims] 1. An ultrasonic wave applying method, wherein a hollow body having at least one opening is ultrasonically vibrated, and deposits released from an inner wall surface of the hollow body are discharged to the outside through at least one of the openings. Method of removing adhered matter by shaking. 2. The discharge of the detached deposits according to claim 1, wherein the air is discharged from at least one of the openings into the inside of the hollow body and discharged from another opening to the outside. A characteristic method for removing deposits by ultrasonic vibration. 3. The method for removing deposits by ultrasonic vibration according to claim 1, wherein the detached deposits are discharged by spontaneous falling. 4. Ultrasonic vibrating means for ultrasonically vibrating a hollow body having at least one opening, and discharging means for discharging deposits released from the inner wall surface of the hollow body to the outside through at least one of the openings. An apparatus for removing deposits by ultrasonic vibration, comprising: 5. The air discharge unit according to claim 4, wherein the discharge unit injects an air flow that flows into the inside of the hollow body from at least one of the openings and is discharged to the outside from another opening. An apparatus for removing deposits by ultrasonic vibration. 6. The method for removing deposits by ultrasonic vibration according to claim 4, wherein the discharging means comprises holding means for holding the hollow body with at least one of the openings facing downward. . 7. The ultrasonic wave according to claim 4 or 5, further comprising a transfer means for sequentially loading and unloading the hollow body into and from the work space defined by the ultrasonic vibration means and the discharge means. A device for removing deposits by vibrating. 8. A method for removing deposits by ultrasonic vibration, which comprises subjecting a rod-shaped body or a plate-shaped body to ultrasonic vibration to remove deposits released from the surface thereof. 9. The method for removing deposits according to claim 8, wherein the deposits released from the surface are removed by injecting an air stream onto the surface.