JPH11319406A - Degasifier and degassing treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform effective degassing in a short time and furthermore, to prevent the overheat of a motor. SOLUTION: This degasifier 30 has a rotary frame 35 fixed to a main shaft 44 connected to a motor 36, auxiliary shafts 46 which are arranged at the end parts of the rotary frame 35 and whose upper parts are inclined to the main shaft 44 side, vessel holders 45 fitted to the auxiliary shafts 46, a main pulley 47 disposed on the main shaft 44 coaxially and independently rotatably, auxiliary pulleys 64 fixed to the auxiliary shafts 46, and endless belts 65 hung and tightened between the auxiliary pulleys 64 and the main pulley 47. In this case, inside a reduced pressure treating chamber 32 having airtightness, the rotary frame 35 is housed, and outside the chamber 32, the motor 36 is disposed, and a vacuum pump 37 for discharging air in the chamber 32 to reduce the pressure of the chamber 32 is fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defoaming apparatus and a defoaming method for mainly removing bubbles contained in a highly viscous liquid.

[0002]

2. Description of the Related Art As shown in FIG.
An opening / closing lid 2 is provided on the upper surface of a non-hermetic housing 1 so as to be openable and closable, a base 3 is provided in a horizontal direction substantially in the middle of the housing 1 in a vertical direction, and a main shaft 4 is provided in a vertical direction substantially in the center of the base 3. A rotation motor 5 and a revolution motor 6 are mounted on the left and right sides of the base 3 with the main shaft 4 interposed therebetween, and output shafts of the respective motors 5 and 6 are projected above the base 3. 7 is fixed, a sub shaft 8 is provided at one end of the rotating frame 7 with its upper part inclined toward the main shaft 4, and a container holder 9 is fixed to the upper part of the sub shaft 8.
The counterbalance weight 10 is provided at the other end of the rotary frame 7 with the movable frame 7 therebetween so as to be movable in the radial direction, and the idle shaft 11 is provided vertically below the counterbalance weight 10 through the rotary frame 7. ,
An upper idle pulley 12 is fixed to an upper end of an idle shaft 11 protruding above the rotating frame 7, and an endless belt 14 is stretched between the upper idle pulley 12 and a holder pulley 13 formed on the outer peripheral surface of the container holder 9. A part of the endless belt 14 is hung on a direction changing roller 15 disposed at the center of rotation of the rotating frame 7, and a lower idle pulley 16 is attached to a lower end of the idle shaft 11 protruding below the rotating frame 7.
And an endless belt 18 is stretched between a rotation pulley 17 fitted on the main shaft 4 via a bearing and the lower idle pulley 16 so that the rotation pulley 17 of the main shaft 4 and the pulley of the rotation motor 5 And an endless belt 21 is stretched between a revolution pulley 20 fixed to the main shaft 4 and a pulley of the revolution motor 6.

In the defoaming device having such a configuration, when the revolving motor 6 is operated, the main shaft 4 rotates and the rotating frame 7 rotates, and the rotation of the rotating frame 7 causes the container set in the container holder 9 to rotate. 22 is the main shaft 4
Rotate on the circumference around the circle, that is, revolve. When the rotation motor 5 is excited, the endless belt 19, the rotation pulley 17, the endless belt 18, the two idle pulleys 12, 1
6, and a rotation force is applied to the container holder 9 by the action of the endless belt 14, whereby the container 22 rotates around the counter shaft 8, that is, rotates.

[0004] As described above, to remove bubbles contained in the processing solution using a conventional defoaming apparatus, simply apply a centrifugal force under atmospheric pressure.

[0005]

However, it is difficult to efficiently remove even small bubbles in a short time simply by applying a centrifugal force to the processing solution.

In order to enhance the defoaming function, it is conceivable to install a defoaming device in a decompression chamber and perform defoaming treatment under reduced pressure. Bubbles contained in the liquid suddenly float up, and a bursting phenomenon occurs in which the bubbles pop on the liquid surface. When the jetting phenomenon occurs, the processing liquid scattered by the jetting jumps out of the container and contaminates the surroundings, adheres to the inside of the lid of the container, or returns the processing liquid adhered to the inside of the lid into the container. In such a case, there is a disadvantage that impurities adhering to the lid are involved and return.

Further, it is common to use a motor as a rotary drive source of the defoaming device. However, if the motor is operated as it is under reduced pressure, heat radiation to the atmosphere cannot be expected. Cause problems.

The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide a defoaming apparatus and a defoaming method capable of performing efficient defoaming in a short time and not overheating a motor. What you want to do.

[0009]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above object, and is characterized in that it is fixed on an upper part of a vertical main shaft connected to a motor and has a main shaft. A rotating shaft that rotates about the main shaft, a sub-shaft that is disposed on the rotating frame at a position deviated from the center of rotation about the main shaft, and that is rotatably mounted with the upper part inclined toward the main shaft. A container holder attached to the shaft, a main pulley provided coaxially with the main shaft and rotatably independently of the main shaft, a sub pulley fixed to the sub shaft, a sub pulley and a main pulley. An endless belt stretched between, and a defoaming device, wherein at least the rotating frame is housed inside an airtight decompression processing chamber, and the motor is disposed outside the decompression processing chamber,
A vacuum pump is provided to discharge the air in the decompression processing chamber to the outside and decompress the interior of the decompression processing chamber. In a state where the pressure in the decompression processing chamber is reduced by the vacuum pump, the rotating frame is rotated by driving a motor to perform defoaming processing. It is a defoaming device characterized by the above-mentioned.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, there is provided a vacuum pump delay means for operating the vacuum pump after a predetermined time has elapsed since the operation of the motor for rotating the rotating frame. It is a defoaming device characterized by the following.

According to a third aspect of the present invention, there is provided a one-way rotation restricting mechanism that prohibits the rotation direction of the main pulley in one direction and permits the other direction, and drives the main shaft and the rotating frame in one direction by driving a motor. When rotated, the rotation of the main pulley with the main shaft is prohibited, and the container mounted on the container holder revolves while revolving, and when rotated in the other direction, co-rotation with the main shaft of the main pulley is allowed and the container does not rotate. The defoaming device according to claim 1, wherein the device is revolved.

According to a fourth aspect of the present invention, there is provided a braking mechanism for applying a braking force to the main pulley rotating with the rotation of the main shaft to reduce the rotation of the main pulley, and rotating the main shaft and the rotating frame by driving the motor. Then, the main pulley rotates at a rotation speed smaller than the rotation speed of the main shaft, and the sub-pulley rotates due to a difference in rotation speed between the main shaft and the main pulley, so that the container revolves while revolving. Item 3. The defoaming device according to item 1 or 2.

According to a fifth aspect of the present invention, the braking mechanism of the fourth aspect is a variable braking mechanism capable of adjusting a braking force,
A defoaming device characterized in that the rotation speed of the container can be adjusted by adjusting the difference in rotation speed between the main shaft and the main pulley by adjusting the braking force.

According to a sixth aspect of the present invention, the processing liquid is placed in a non-sealed container, the container is mounted on a container holder of a rotating frame, and in this state, the rotating frame is rotated by driving a motor. A primary defoaming process is performed by applying a centrifugal force to the processing liquid, and after the primary defoaming process, at least the decompression processing chamber containing the rotating frame is decompressed, and the rotating frame is rotated in this decompressed state to form the processing liquid. A defoaming method is characterized in that a secondary defoaming process is performed by applying a centrifugal force, and after the secondary defoaming process is completed, the inside of the decompression chamber is returned to the atmospheric pressure.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a configuration of a first embodiment of a defoaming device 30, and FIG. 2 is a cross-sectional view showing a main part thereof.

In the first embodiment of the defoaming device 30, an airtight decompression processing chamber 32 is provided on a housing 31 having air permeability with the outside, and the ceiling surface of the housing 31 and the decompression processing chamber 32 are provided. And a floor 33 which extends in the horizontal direction, and a rotating frame 35 which rotates while supporting the container 34 in the decompression processing chamber 32 above the base 33.
And a motor 36 for rotating the rotating frame 35 in the housing 31 below the base 33, and a vacuum pump for discharging air in the decompression processing chamber 32 to the outside to decompress the inside of the decompression processing chamber 32. 37 are provided.

The decompression processing chamber 32 is a metal chamber roughly composed of a chamber main body 32a having an open upper surface and an opening / closing lid 32b for opening and closing the upper opening of the chamber main body 32a. A lock mechanism 4 for locking the opening / closing lid 32b in a closed state on the opposite side of the hinge mechanism 39 for freely supporting.
0, and an air release valve 41 is provided on the side surface of the chamber main body 32a. Therefore, when the vacuum pump 37 is operated with the opening / closing lid 32b closed and the atmosphere opening valve 41 closed, the internal air is sucked from the exhaust port 42 on the bottom surface (base 33), and the pressure inside the decompression processing chamber 32 gradually increases. The pressure is reduced to a reduced pressure state close to a vacuum. Then, when the atmosphere release valve 41 is opened in this depressurized state (so-called vacuum state), outside air is sucked into the decompression processing chamber 32, so that the inside returns to the atmospheric pressure and the opening / closing lid 32b can be opened. In addition, the motor 36, the vacuum pump 37, the solenoid of the atmosphere release valve 41,
The solenoid and the like of the lock mechanism 40 are electrically connected to a control device (not shown), and the operation, stop, and the like are controlled by a signal from the control device.

Next, the internal configuration will be described. A through hole communicating between the decompression processing chamber 32 and the housing 31 is opened substantially at the center of the base 33, and a rocking bearing 43 is provided in this through hole with a part inserted from the decompression processing chamber 32 side. While the lower portion is supported by the swing bearing 43, the main shaft 4
4 is provided in the vertical direction, and the rotating frame 35
The rotating frame 35 is provided with a sub shaft 46 for mounting the container holder 45 on the upper portion thereof with the upper portion inclined toward the main shaft 44, and the main shaft 44 is provided outside the main shaft 44 close to the rotating frame 35 via a bearing. The pulley 47 is provided so as to be rotatable independently of the main shaft 44, and a one-way rotation restricting mechanism for controlling the rotation direction of the main pulley 47 is provided on one side of the base 33. Then, the output shaft of the motor 36 provided inside the housing 31 is connected to the lower end of the main shaft 44 via a coupling 49.

The oscillating bearing 43 has a flange body 50 on the outer periphery and a bearing body 51 having a bearing and an airtight seal member inside.
An upper rubber ring plate 52 and a lower rubber ring plate 53 for sandwiching the flange 50; a pressing member 54 for pressing the upper rubber ring plate 52 from above; and a pressing member 5 fixed on the base 33.
4 comprises a base 55 for mounting the same. The airtight seal member is a seal for maintaining the airtightness between the decompression processing chamber 32 and the housing 31. Therefore, even if the air pressure in the decompression processing chamber 32 is reduced, the air in the housing 31 is not sucked through the bearing body 51.

The flange 50 has a disk shape whose thickness is gradually reduced from the base end toward the outer periphery, and is disposed substantially at the center of the vertical length of the cylindrical portion of the bearing body 51. The rubber ring plates 52 and 53 sandwiching the flange 50 are elastic rubber plates having a uniform thickness in a natural state where no force is applied.
Therefore, the lower rubber ring plate 53 and the upper rubber ring plate 52
When the pressing member 54 presses the flange portion 50 from above with the flange portion 50 interposed therebetween, the portion contacting the thick portion of the flange portion 50 is strongly compressed, and the portion contacting the thin portion is weakly compressed. Become. In other words, the portion closer to the bearing body 51 of the flange portion 50 is held with a stronger force, and the holding force is set to be gradually weaker outward.

As described above, when the thickness of the flange portion 50 is gradually increased toward the distal end side by increasing the thickness at the base end side, when the bearing main body 51 swings due to the swing of the main shaft 44, the bearing body 51 is formed. In the close part, rubber ring plate 5
2 and 53, and the portion toward the tip is pressed with a gradually decreasing force, and the rubber ring plates 52 and 53 are pressed according to the magnitude of the swinging power at the time of swinging.
Presses the flange 50. Therefore, in each part, the pressing force of the magnitude corresponding to the magnitude of the swinging power is applied to the flange 50.
To make it easier to return to the initial position. Bearing body 5
1 swiftly converges and the main shaft 44
Is supported in the initial vertical direction.

Then, even if the bearing body 51 swings, the lower surface of the lower rubber ring plate 53 is pressed against the base 33 (the floor surface of the decompression processing chamber 32) and the upper surface extends over the entire lower surface of the flange portion 50. Since the airtightness is maintained by the pressure contact, the airtightness between the housing 31 and the decompression processing chamber 32 is not broken due to the sealing effect of the airtight sealing member. Therefore, the lower rubber ring plate 53 in the present embodiment also functions as an airtight seal member.

The detent pin 56 is inserted between the base 33 and the lower rubber ring plate 53 and between the lower rubber ring plate 53 and the flange 50 halfway through the thickness of the lower rubber ring plate 53 so as to be airtight. This prevents the members from inadvertently rotating while maintaining the characteristics.

In this embodiment, the motor mounting base 57 is fixed to the lower end surface of the bearing main body 51 with bolts, and the motor 36 is fixed to the lower surface of the motor mounting base 57. Therefore, the own weight of the motor 36 acts on the bearing main body 51 without acting on the housing 31, and this own weight acts as a swing convergence force and a vibration prevention force of the main shaft 44.

Next, the rotating frame 35 will be described. As shown in FIGS. 2 and 3, the rotating frame 35 is a trapezoidal aluminum frame when viewed from the front and a trapezoidal shape and a rectangular shape when viewed from above. The center of the lower surface portion (that is, the center of the rotating frame 35) is The main shaft 44 is fixed to the upper end flange portion with bolts, bearings 60 for sub shafts are provided on the inclined surfaces at both ends inclined at about 45 °, and a direction changing roller 61 is rotatably provided on the lower surface near the inclined surface. The direction changing roller 61 is provided with the axial direction directed in the width direction of the rotating frame 35, and provided with a vertical difference according to a vertical dimension difference of a belt groove of the main pulley 47 described later.

The sub-shaft bearing 60 is formed by closing a lower end opening of a cylindrical body integrally formed with the rotating frame 35 with a lid member, and internally providing two bearings up and down.
6 is rotatably supported. This bearing for counter shaft 6
0, the sub shafts 46 are rotatably provided.
Are arranged on the rotating frame 35 at a position deviated by the same distance from the rotation center about the main shaft 44, that is, at equal intervals of 180 ° in a circumferential direction on a concentric circle about the main shaft 44,
The upper part is rotatably attached to the main shaft 44 side at an angle of 45 °. Then, the container holder 45 is fixed to the upper end of each sub shaft 46 protruding inside the rotating frame 35.

The container holder 45 is a member for supporting the container 34 for holding the liquid to be processed.
At the upper end of the cylindrical body for housing 4, claw pieces 62 are projected upward at three locations at the same interval. Therefore, when the container 34 is stored in the container holder 45, the claw pieces 62 are engaged in the engagement grooves of the container 34, and the rotation of the sub shaft 46 causes the container holder 4 to rotate.
5 can be rotated.

The container 34 set in the container holder 45 is composed of a cup having an open upper surface and a lid for closing the upper surface of the cup. A vent 63 is formed in the lid. It is configured such that no pressure difference between the inside and the outside occurs.

The lower end of the sub shaft 46 protruding from the lid constituting the lower end of the sub shaft bearing 60 fixes the sub pulley 64, and the main pulley 47 provided on the sub pulley 64 and the main shaft 44.
And an endless belt 65 having a circular cross section is passed around under the direction changing roller 61 in the middle.

The main pulley 47 is rotatable independently of the main shaft 44 by two upper and lower bearings.
4 is coaxially mounted on the upper part, and 3
A belt groove is formed. Of the three belt grooves,
The upper two are grooves having a substantially semicircular cross section for hanging the endless belt 65 on the sub-pulley 64, and the lower one which is formed slightly away from these belt grooves is connected to the one-way rotation restricting mechanism. This groove is formed with irregularities corresponding to the steps of the endless belt 66 with steps. Therefore, as shown in FIG. 2, the endless belt 65 hung on the upper belt groove is
The endless belt 65 is extended over the auxiliary pulley 64 on the side of the higher direction change roller 61, and is suspended on a belt groove located thereunder.
Is wound around the auxiliary pulley 64 on the lower direction change roller 61 side, and the stepped endless belt 66 hooked on the belt groove at the lowest position is wound around the pulley 67 of the one-way rotation restricting mechanism.

The one-way rotation restricting mechanism is a mechanism that prohibits the rotation direction of the main pulley 47 in one direction and permits the other direction. In the present embodiment, the main pulley 47 rotates in one direction but rotates in the other direction. A one-way clutch 70 which is not mounted is mounted on the base 33 and used. Then, a stepped endless belt 66 is stretched between the pulley 67 attached to the shaft of the one-way clutch 70 and the main pulley 47.

Therefore, when the main pulley 47 receives a rotational force from the main shaft 44, for example, if it receives a clockwise positive rotational force, the one-way clutch 70 allows the main pulley 47 to rotate together with the main shaft 44 in the clockwise direction. (Co-rotation). When the main pulley 47 rotates together with the main shaft 44 in the same direction, the main pulley 47 connected by the endless belt 66
Since no phase difference occurs between the pulleys 47 and 64, no couple is generated between the pulleys 47 and 64, and the endless belt 65 is not moved (transmission of rotational force) is performed.
Does not rotate. Therefore, the container holder 45 attached to the sub shaft 46 does not rotate (rotate) about the sub shaft 46, and the container 34 simply rotates around the main shaft 44 of the rotating frame 35, that is, revolves. .

In other words, when the main shaft 44 is rotated in the forward direction, the rotating frame 35 rotates around the main shaft 44, whereby the container 34 revolves around the main shaft 44. Because the counter shaft 46 does not rotate, the container 34 does not rotate.

On the other hand, when receiving a counterclockwise rotation force from the main shaft 44, the main pulley 47 is in a state where reverse rotation is prohibited by the action of the one-way clutch 70 via the stepped endless belt 66. Therefore, it remains stopped irrespective of the rotation of the main shaft 44. The main shaft 44 rotates in the reverse direction and the rotating frame 3
If the main pulley 47 is stopped in a state in which the sub-pulley 64 is also rotating reversely, the sub-pulley 64 revolves around the main shaft 44 by the reverse rotation of the rotating frame 35. Accordingly, the main pulley 47 and the sub pulley 6
4, a difference in tension occurs between one and the other of the endless belt 65 stretched over the pulleys 47 and 64, and the sub-pulley 64 rotates. Therefore, the container 34 rotates while revolving by the rotation of the rotating frame 35. In the present embodiment,
Since the reduction ratio between the main pulley 47 and the sub pulley 64 is set to 2.5: 1, the container 34 rotates at 1 / 2.5 of the revolution speed. This reduction ratio can be appropriately set by changing the size of both pulleys 47 and 64.

As described above, the defoaming device 3 in the present embodiment
0 means that only the rotation direction of the main shaft 44 is switched,
4 can be switched between a state in which it revolves while revolving and a state in which it revolves without revolving.

Next, the defoaming device 30 having the above configuration
In the case of defoaming using, for example, a defoaming process of a liquid having a high viscosity, such as an epoxy-based resin liquid, and in which bubbles inside hardly float, will be described. First, the same amount (the same weight) of the liquid to be defoamed is put into each of the containers 34, the lids are closed, and then set in the container holder 45. Next, the lid 32b is closed and locked by the lock mechanism 40. In this state, a start button on an operation panel (not shown) is pressed, whereby the motor 36 is operated by a signal from the control device to drive the spindle 4
4 is revolved clockwise. At this time, the vacuum pump 37 remains stopped, and the inside of the decompression processing chamber 32 remains at the atmospheric pressure.

When the main shaft 44 revolves clockwise, the one-way clutch 70 allows the main pulley 47 to rotate, and the main pulley 47 rotates together with the main shaft 44, so that the container 34 revolves without rotating. When the container 34 revolves, a centrifugal force due to the revolving acts on the processing liquid in the container 34, and in this embodiment, a centrifugal force of about 600 G is generated at 2000 RPM. Since the container 34 is inclined 45 ° inward, the processing liquid in the container is pressed against the inner surface of the container 34 by the centrifugal force of 600 G, and the component force of the pressing force acts downward due to the inclination of the inner surface. I do. Therefore, the same phenomenon occurs as when the specific gravity of the processing liquid in the container 34 suddenly increases, and this phenomenon increases the buoyancy of bubbles (bubbles) contained in the processing liquid, thereby causing the bubbles to become liquid. Move toward the surface. Therefore, at this point, many bubbles, particularly large bubbles, rise to the liquid level and escape from the processing liquid (primary defoaming treatment).

When a predetermined time set on a timer (not shown) has elapsed, the operation mode changes from the atmospheric pressure defoaming mode (primary defoaming process) to the vacuum defoaming mode (secondary defoaming process).
And the control device continues to operate the motor 36 and starts the vacuum pump 37.
The air in 2 is exhausted to the outside and gradually becomes negative pressure. Since this reduced pressure also acts on the processing liquid, small bubbles in the processing liquid also expand, whereby bubbles contained in the processing liquid increase in buoyancy even to small bubbles and easily rise, and in a short time. It floats on the liquid surface and is finally pushed out of the liquid surface.
Therefore, bubbles in the processing liquid are removed from the liquid surface by receiving centrifugal force for large bubbles (primary defoaming treatment), and small bubbles that cannot be easily floated by centrifugal force alone are decompressed and expanded. Increases buoyancy and escapes from the liquid surface (secondary defoaming treatment). For this reason, even a small bubble which does not disappear by floating the treatment liquid at atmospheric pressure alone can be reliably eliminated in a short time by applying a centrifugal force and reducing the pressure.

As described above, defoaming is performed in advance by applying centrifugal force at atmospheric pressure and then defoaming by reducing the pressure.
Since large bubbles escape in advance from the processing solution at the time when centrifugal force is applied, relatively small bubbles will float in a decompressed state, and therefore,
Not only small bubbles in the processing liquid can be surely defoamed, but also a phenomenon in which bubbles are ejected on the liquid surface can be suppressed. In the present embodiment, the control device including the timer functions as a vacuum pump delay unit, and the time set in the timer becomes the delay time, and the rotation frame 3
After the elapse of the delay time since the operation of the motor 36 that rotates the vacuum pump 5, the vacuum pump 37 operates.

The operation of the vacuum pump 37 causes the decompression chamber 3 to operate.
When a predetermined time has elapsed since the start of the depressurization of the inside of the pump 2, that is, when the vacuum defoaming mode is performed for a predetermined time set in the timer, the motor 36 and the vacuum pump 3
At the same time as the operation of 7 is stopped, the atmosphere release valve 41 is opened, whereby outside air is inserted into the decompression processing chamber 32 to return to the atmospheric pressure. When the pressure reduction chamber 32 is returned to the atmospheric pressure, the control device releases the lock of the lock mechanism 40.
Therefore, the opening / closing lid 32b of the decompression processing chamber 32 can be opened by hand, and the container 34 after the defoaming process can be taken out.

In the above operation, the processing liquid in the container 34 hardly flows because the container 34 does not rotate even if revolved. Therefore, a large stirring and mixing effect cannot be expected. Therefore, in this process,
Suitable for defoaming treatment liquid that does not require stirring and mixing.

Next, a process of defoaming while stirring and mixing the processing liquids, for example, mixing two kinds of processing liquids, then stirring and mixing a plurality of types of processing liquids such as an adhesive to be used, and performing a defoaming treatment. The case will be described.

First, the first liquid and the second liquid are put into one container 34 in accordance with the mixing ratio. Then, the first liquid and the second liquid are also put into the other container 34 by the same amount (the same weight). In this way, the first mixture is stored in both containers 34 at a predetermined mixing ratio.
The liquid and the second liquid are charged, and the weights of both containers 34 become equal.

When the liquid has been put into the container 34, it is closed and then mounted on the container holder 45. Next, the cover 32b is closed, the start button on the operation panel is pressed, and the motor 36 is operated by the signal from the control device to revolve the main shaft 44 in the counterclockwise direction. The rotation of the container 34 is prohibited, and only the main shaft 44 rotates while stopped, so that the container 34 revolves while rotating. At this time, the vacuum pump 37 remains stopped, and the inside of the decompression processing chamber 32 remains at the atmospheric pressure.

When the container 34 revolves while rotating, the centrifugal force acts on the processing liquid in the container 34 and the container 34 is tilted inward by 45 °. Similarly to the above, the buoyancy of the bubbles (bubbles) contained in the processing liquid eventually increases, and the bubbles tend to move toward the liquid surface. Thereby, a bubble erasing action can be expected.

Here, the container 34 not only revolves, but also rotates about the sub-shaft 46 inclined at 45 °, so that the centrifugal force by the rotation acts on the internal processing liquid by the rotation of the container 34. Therefore, the processing liquid in the container 34 receives the centrifugal force due to the revolution and is pressed toward the outside of the orbital locus, and also receives the downward force due to the 45 ° inclination. It is pressed against the peripheral surface. For this reason, forces in various directions act on the processing liquid and flow in a complicated manner, whereby stirring and mixing are performed.

In this way, when the container 34 is rotated while revolving, the defoaming process can be performed while stirring and mixing the internal processing liquid. When the atmospheric pressure defoaming mode is completed, the defoaming is continuously performed in the vacuum defoaming mode. The times of the bubble mode and the vacuum degassing mode are set as appropriate.

When the processing liquid flows in a complicated manner in the container 34 and is stirred and mixed, the liquid may flow downward from the liquid surface side, so that the bubbles that are about to float may fall again due to the flow. . Therefore, when the container 34 rotates, the stirring and mixing action can be expected, but on the other hand, the bubble erasing action is reduced as compared with the case where the container 34 does not rotate. For this reason, when the process of stirring and mixing is performed at the same time,
It is advantageous to revolve while revolving, but when it is not necessary to stir and mix, it is more advantageous to simply revolve the container 34 without revolving.

The defoaming device 30 in the above-described embodiment
Is provided with two containers 34 on the rotating frame 35 at the same distance from each other about the main shaft 44.
The processing liquid of the same weight is put in the container and the processing is performed while maintaining the balance, so that the processing liquid can be processed twice at a time as compared with the case where one container 34 is provided.
Operation is easy because there is no need to adjust the counterbalance weight. The number of containers 34 is not limited to two, and a plurality of sub shafts 46 are arranged on the rotating frame 35 at equal intervals in a circumferential direction on a concentric circle centered on the main shaft 44,
A container holder 45 is provided on each counter shaft 46 and the container 34
If you attach 3 containers, 4 containers ...
4 can be provided. When one container 34 is provided, the sub shaft 46 is disposed on the rotating frame 35 at a position deviated from the center of rotation about the main shaft 44, and the container 34 is mounted on the container holder 45 provided on the sub shaft 46. , And a counterbalance weight appropriate for this container 34 etc.
For example, it may be provided on the opposite side of the main shaft 44.

In the above-described embodiment, the one-way clutch 70 switches the state in which the co-rotation of the main pulley 47 with the main shaft 44 is freely permitted and the state in which the rotation of the main pulley 47 is prohibited according to the rotation direction of the main shaft 44. , The presence or absence of rotation of the container 34 is switched. Therefore, when the container 34 rotates, the rotation speed of the rotation is proportional to the rotation speed of the main shaft 44 because the reduction ratio between the main pulley 47 and the sub pulley 64 is constant.

Therefore, in place of the one-way clutch 70, a braking mechanism for applying a braking force to the main pulley 47 rotating with the rotation of the main shaft 44 to reduce the rotation of the main pulley 47, for example, an electromagnetic brake device (not shown) ) Is provided. The mechanical connection between the electromagnetic brake device and the main pulley 47 may be connected via a stepped endless belt, as in the above embodiment.

As described above, when the electromagnetic brake device for reducing the rotation of the main pulley 47 is provided, the electromagnetic force of the electromagnetic brake device, that is, the braking force is adjusted while the main shaft 44 and the rotating frame 35 are rotating. The main pulley 47 can rotate together with the main shaft 44 at a lower rotation speed. Then, when a difference occurs in the number of rotations between the main shaft 44 and the main pulley 47, the sub-pulley 64 rotates, so that the container 34 can be rotated on its own. The main pulley 47 and the main shaft 44
, In other words, the rotational speed of the container 34 can be adjusted by increasing or decreasing the braking force.
Therefore, when performing the defoaming process while stirring and mixing,
The number of rotations and the number of revolutions can be set to desired values in accordance with the characteristics of the processing liquid to be processed, and efficient processing can be performed.

In the above-described embodiment, the main shaft 44 is supported by the swing bearing 43 so that the main shaft 44 is quickly converged to the center even when the main shaft 44 is slightly swung at the start, for example. The present invention is not limited to the configuration supported by the swing bearing 43. The rotating frame 35 is housed in the decompression processing chamber 32,
If the motor 36 is arranged outside the above, the structure of the decompression processing chamber 32 can be appropriately designed and changed.

For example, another embodiment of the defoaming device 30 shown in FIG.
0, the flange 50 of the pivot shaft 72,
As with the swing bearing 43, the rubber rings 52,
A swing frame 74 is provided on the upper end of a swing shaft 72 projecting upward through a bracket 73 and sandwiched between the swing frames 74.
And the upper surface plate of the swing frame 74 is
5 and the outer peripheral edge of the partition plate 75 and the housing 31
By providing a bellows-like flexible seal material 76 between the inner surface of the housing and the inner surface of the housing 77, the inside of the housing 31 above the partitioning plate 75 can be used as the decompression processing chamber 32, and the upper opening of the housing 77 can seal the decompression processing chamber 32. An opening / closing lid 78 is provided so as to be opened and closed by a hinge mechanism 39, and a lock mechanism 40 is provided on the opposite side of the hinge mechanism 39.

The lower part of the partition plate 75 which is not sealed and communicates with the outside is defined as a machine room 79, and a vacuum pump 37 is provided in the machine room 79. The motor 36 is connected in the swing frame 74 below the partition plate 75 with the output shaft facing upward, and the motor 36 protrudes from the swing frame 74 into the decompression processing chamber 32. The main shaft 44 is connected to the output shaft, and a rotating frame 35 similar to that of the above embodiment is fixed to the upper end of the main shaft 44. The main pulley 47 is provided on the main shaft 44 so as to be rotatable independently. Pulley 67 of one-way clutch 70 provided on one side
And a main pulley 47, and a stepless endless belt 66, and an endless belt 65 having a substantially circular cross section between the sub pulley 64 of the sub shaft 46 provided on both sides of the rotating frame 35 and the main pulley 47. It is.

Incidentally, a detent pin 56 is inserted into the rubber ring 53 supporting the lower surface of the flange 50 of the swing shaft 72 from the lower surface of the under base plate 71, and the rubber ring 53 also stops the rotation of the flange 50 from the rubber ring 53. Inadvertent rotation by inserting the pin 56 is prevented. Further, in order to maintain the airtightness of the decompression processing chamber 32, not only between the outer peripheral edge of the partition plate 75 and the housing 31, but also around the output shaft of the motor 36 penetrating the partition plate 75 and the one-way clutch 70. Provide a sealing material around the shaft.

In the defoaming device 30 having such a configuration, the motor 36 and the vacuum pump 37 are housed in the air-permeable machine room 79, so that the heat during operation is cooled by the atmosphere, Never overheat.

Since the flange portion 50 of the swing shaft 72 is sandwiched between the rubber rings 52 and 53, the swing shaft 72 always exerts a restoring force that tends to stand vertically, as in the above-described embodiment. When the main shaft 44 and the rotating frame 35 swing when the rotating frame 35 starts to rotate, the members above the swing shaft 72, that is, the swing frame 74 and the main shaft 4
4 and the rotating frame 35 swing together.
Then, the swing is caused by the flange portion 50 and the two rubber rings 52,
53 gradually converges due to the restoring action of the rotating frame 35.
When the rotating shaft rotates at a high speed, the swing shaft 72 rises vertically, so that the main shaft 44 becomes vertical, and the rotating frame 35 rotates in the horizontal direction.

When the swing frame 74 swings, the partition plate 75 on the upper surface also swings, but the flexible seal material 76 absorbs the swing of the partition plate 75 and maintains the airtightness of the decompression processing chamber 32. I do. Therefore, as in the previous embodiment,
After performing the defoaming process in the atmospheric pressure defoaming mode, the decompression processing chamber 3
In the vacuum defoaming mode in which the defoaming process is performed in a state where the pressure inside the chamber 2 is reduced, even if the swing frame 74 swings, the outside air may enter the decompression processing chamber 32 from the periphery of the partition plate 75. Absent.

The decompression chamber 32 is appropriately provided with a sealing material at a necessary place in order to maintain airtightness. The sealing material may be an O-ring, a packing seal, a bellows-type sealing material, a rotary seal, or other known sealing means. Can be appropriately selected and used. Further, as shown in FIG. 6, the sealing material between the partition plate 75 and the housing 31 in the second embodiment is formed by an outer peripheral edge of the partition plate 75 and a flange plate 81 in the housing 31.
May be overlapped with each other in a slidable state, and the overlapped portion may be sealed by being covered with a flexible sheet material 82 in an airtight state.

[0061]

According to the present invention as described above, the following effects can be obtained. According to the first aspect of the present invention, at least the rotating frame is housed inside the airtight decompression processing chamber, a motor is disposed outside the decompression processing chamber, and the air in the decompression processing chamber is discharged to the outside by the vacuum pump. Since the defoaming process is performed by rotating the rotating frame by driving the motor in a state where the pressure in the decompression processing chamber is reduced, the buoyancy is increased even for small bubbles contained in the processing liquid, so that the bubbles easily float. Become. Therefore, it is possible to reliably perform the defoaming process in a short time even for small bubbles that are difficult to be eliminated only by applying the centrifugal force.

According to the second aspect of the present invention, since the vacuum pump delay means for operating the vacuum pump after a predetermined time has elapsed since the operation of the motor for rotating the rotating frame is provided, the processing liquid in the container is first provided with the vacuum pump delay means. By applying a centrifugal force, relatively large bubbles are defoamed, and then a centrifugal force can be applied under reduced pressure. Therefore, when the centrifugal force is applied in a reduced pressure state, the large bubbles disappear, and the jetting phenomenon can be suppressed. This does not cause inconveniences such as the scattering of the processing liquid and the inclusion of impurities when the scattering processing liquid returns to the container.

According to the third aspect of the present invention, there is provided a one-way rotation restricting mechanism which prohibits the rotation direction of the main pulley in one direction and permits the other direction, and drives the main shaft and the rotating frame in one direction by driving the motor. When rotated, the rotation of the main pulley with the main shaft is prohibited, and the container mounted on the container holder revolves while revolving, and when rotated in the other direction, co-rotation with the main shaft of the main pulley is allowed and the container does not rotate. Since the orbit revolves, the rotation of the container can be controlled only by switching the rotation direction of the motor. Therefore, it is not necessary to separately provide a motor for rotation and a motor for revolution, and the structure of the defoaming device can be simplified. For this reason, the size and weight of the device can be reduced, and manufacturing and maintenance are facilitated.

According to the fourth aspect of the present invention, there is provided a braking mechanism for applying a braking force to the main pulley rotating with the rotation of the main shaft to reduce the rotation of the main pulley, and rotating the main shaft and the rotating frame by driving the motor. Then, the main pulley rotated at a rotation speed less than the rotation speed of the main shaft, and the difference in rotation speed between the main shaft and the main pulley caused the sub-pulley to rotate and the container revolved while revolving. With this, it is possible to control the presence or absence of rotation.

According to the fifth aspect of the present invention, since the braking force is a variable braking mechanism that can be adjusted, the rotation speed of the container is adjusted by adjusting the difference in the rotation speed between the revolving shaft and the main pulley by adjusting the braking force. can do. Therefore, the efficiency can be improved by adjusting the number of rotations according to the characteristics of the liquid to be treated.

According to the sixth aspect of the present invention, the processing liquid is placed in a non-sealed container, and this container is mounted on the container holder of the rotating frame. In this state, the rotating frame is rotated by driving a motor to rotate the rotating frame. A primary defoaming process is performed by applying a centrifugal force to the processing liquid, and after the primary defoaming process, at least the decompression processing chamber containing the rotating frame is decompressed, and the rotating frame is rotated in this decompressed state to form the processing liquid. A secondary defoaming process is performed by applying a centrifugal force, and after the secondary defoaming process is completed, the decompression chamber is returned to the atmospheric pressure. Therefore, even small bubbles can be efficiently defoamed in a short time. In addition, since the occurrence of the jetting phenomenon can be suppressed, the defoaming treatment can be performed without inconveniences such as the scattering of the processing liquid and the inclusion of impurities when the scattered processing liquid returns to the container.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an internal structure of a first embodiment of a defoaming apparatus according to the present invention.

FIG. 2 is an enlarged sectional view showing a main part of the defoaming device shown in FIG.

FIG. 3 is a plan view of a rotating frame.

FIG. 4 is a bottom view in which a part of the rotating frame is sectioned;

FIG. 5 is a sectional view showing an internal structure of a second embodiment of the defoaming apparatus according to the present invention.

FIG. 6 is a cross-sectional view illustrating a schematic configuration of another embodiment of a seal member.

FIG. 7 is a sectional view showing an internal structure of a conventional defoaming device.

[Explanation of symbols]

30 Defoaming device according to the present invention 31 Housing 32 Decompression processing chamber 33 Base 34 Container 35 Rotating frame 36 Motor 37 Vacuum pump 39 Hinge mechanism 40 Lock mechanism 41 Atmospheric release valve 42 Exhaust port 43 Swing bearing 44 Main shaft 45 Container holder 46 Secondary Shaft 47 Main pulley 49 Coupling 50 Flange 51 Bearing body 52 Upper rubber ring plate 53 Lower rubber ring plate 54 Pressing member 55 Base 56 Detent pin 57 Motor mounting base 60 Bearing for sub shaft 61 Direction conversion roller 62 Claw piece 63 Through Pores 64 Sub pulley 65 Endless belt connecting main pulley and sub pulley 66 Stepless endless belt connecting main pulley and one-way clutch 67 Pulley 70 One-way clutch 71 Under base 72 Swing shaft 73 Bracket 74 Swing Moving frame 75 Partition plate 76 Flexi Lucille member 77 housing 78 opening-closing lid 79 machine room 80 flexible pipe 81 flange plate

Claims (6)

[Claims] A rotating frame fixed to an upper part of a longitudinal main shaft connected to a motor and rotating about the main shaft; and a rotating frame disposed on the rotating frame at a position deviated from a center of rotation about the main shaft. A sub shaft rotatably mounted with the upper part inclined to the main shaft side; a container holder mounted on the sub shaft; and a coaxial with the main shaft so as to be rotatable independently of the main shaft. A main pulley, a sub pulley fixed to the sub shaft, an endless belt stretched between the sub pulley and the main pulley,
A defoaming device having at least the rotating frame housed in an air-tight decompression chamber, disposing the motor outside the decompression chamber, and discharging air in the decompression chamber to the outside. A vacuum pump is provided to reduce the pressure in the decompression processing chamber.
A defoaming device characterized in that a rotating frame is rotated by driving a motor to perform a defoaming process. 2. The defoaming apparatus according to claim 1, further comprising vacuum pump delay means for operating a vacuum pump after a predetermined time has elapsed since a motor for rotating the rotating frame is operated. 3. A one-way rotation restricting mechanism for prohibiting the rotation direction of the main pulley in one direction and allowing the rotation in the other direction is provided. When the main shaft and the rotating frame are rotated in one direction by driving a motor, the main shaft of the main pulley and the main shaft are rotated. That the container attached to the container holder revolves around itself and revolves around itself, and when rotated in the other direction, co-rotation with the main shaft of the main pulley is allowed so that the container revolves without rotating around itself. The defoaming device according to claim 1 or 2, wherein 4. A braking mechanism for applying a braking force to a main pulley rotating with the rotation of the main shaft to reduce the rotation of the main pulley, wherein the rotation of the main shaft and the rotating frame by driving of the motor is smaller than the rotation speed of the main shaft. 3. The container according to claim 1, wherein the main pulley rotates at a low rotation speed, and the sub-pulley rotates due to a difference between the rotation speeds of the main shaft and the main pulley so that the container revolves while revolving. Defoaming device. 5. The braking mechanism is a variable braking mechanism capable of adjusting a braking force, and is capable of adjusting a rotation speed of a container by adjusting a difference in rotation speed between a main shaft and a main pulley by adjusting the braking force. The defoaming device according to claim 4, wherein: 6. A processing liquid is placed in a non-sealed container, and the container is mounted on a container holder of a rotating frame. In this state, the rotating frame is rotated by driving a motor to apply a centrifugal force to the processing liquid. After the primary defoaming process, at least after the primary defoaming process, the pressure in the decompression processing chamber accommodating the rotating frame is reduced, and the rotating frame is rotated in this reduced pressure state to give a centrifugal force to the processing solution to perform a secondary defoaming. A defoaming method comprising performing a defoaming process and returning the decompression chamber to atmospheric pressure after the secondary defoaming process is completed.