JP2001205066A - Kneader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a kneader which can knead a liquid resin and powder efficiently. SOLUTION: In the kneader A provided with a container 3 to which the liquid resin and the powder are supplied, a rotary shaft 2 which is arranged approximately vertically in the container 3, and agitation blades 1 which are fitted to the lower part of the shaft 2 to protrude radially from the shaft 2, the uppermost blade 1a is positioned to be rotated near the surface of liquid 10 in the container 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kneader for kneading liquid resin and powder.

[0002]

2. Description of the Related Art The work of kneading a liquid resin and a powder is performed in a process of preparing a sealing resin for a semiconductor element, a resin varnish for producing a prepreg, and the like.

Conventionally, for kneading a liquid resin and powder, a kneader provided with a rotating stirring blade in a container is often used. In this case, first, the liquid resin is supplied into the container and the stirring blade is operated, and then the powder is charged into the container,
It mixes a liquid resin and a liquid material such as a powder. In addition, as a powder feeder, a screw conveyor that is easy to feed and discharge and is suitable for flow rate control is generally used.

[0004]

However, in the conventional stirring blade, the powder is mixed into the liquid resin after a certain amount of the powder is taken into the liquid resin, and the powder immediately after being introduced is difficult to be taken into the liquid resin. there were. Generally, it takes time for the introduced powder to be taken into the liquid resin to some extent, and therefore, it takes a long time for the entire kneading operation.

The present invention has been made in view of the above points, and has as its object to provide a kneader capable of efficiently kneading a liquid resin and a powder.

[0006]

A kneader A according to claim 1 of the present invention comprises: a container 3 into which a liquid resin and powder are supplied;
A rotating shaft 2 disposed substantially vertically in the container 3,
In a kneader A having a lower part of the rotating shaft 2 and a plurality of upper and lower stirring blades 1 protruding from the rotating shaft 2 in the radial direction, the stirring blade 1a located at the uppermost stage is a liquid material in a container. 10
Characterized in that it is adjusted to rotate near the liquid surface.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, a heating medium for drying the powder is supplied to a screw conveyor B for transporting the powder into the container 3. It is a feature.

According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, above the stirring blade 1a located at the uppermost stage,
A rotary plate 8 that is horizontally rotated is disposed immediately below a position where powder is supplied from the screw conveyor B.

According to a fourth aspect of the present invention, in addition to the configuration of any one of the first to third aspects, the stirring blades 1a and 1d located at the uppermost stage and the lowermost stage in the upper and lower stages of the stirring blades 1 are excluded. The stirring blades 1b and 1c are characterized in that a notch is formed at the edge opposite to the rotation direction.

According to a fifth aspect of the present invention, in addition to any one of the first to fourth aspects, a stirring blade 1d located at the lowermost stage is provided.
A downward projection 9 is formed on the upper surface of the substrate.

According to a sixth aspect of the present invention, in addition to any one of the first to fifth aspects, the height of the liquid surface of the liquid material 10 in the container 3 is adjusted to be vertically movable. It is assumed that.

According to a seventh aspect of the present invention, in addition to any one of the first to fifth aspects, the stirring blade 1a located at the uppermost stage is provided.
Is formed so as to rotate at the same speed as the rotating shaft 2 and to be movable up and down along the rotating shaft 2.

[0013]

Embodiments of the present invention will be described below.

FIG. 1 shows an example of a kneader A according to the present invention. Container 3 to which liquid resin and powder are supplied
Is not particularly limited, and those similar to conventional ones can be appropriately used. A powder supply port 3a is provided at the upper part of the container 3, and the liquid material 1 after kneading is provided.
A discharge port for discharging 0 is not shown. The rotating shaft 2 is disposed in the container 3 in a substantially vertical direction, and is rotatably supported substantially horizontally. The rotary shaft 2 is not particularly limited, and the same rotary shaft as in the related art can be appropriately used. The rotary shaft 2 is rotated by transmitting rotation of a motor or the like (not shown). Further, a plurality of upper and lower stirring blades 1 are provided below the rotary shaft 2 in a radial direction from the rotary shaft 2. The size and shape of the stirring blade 1 are not particularly limited, and those similar to conventional ones can be appropriately used. The upper and lower stirring blades 1
The interval between them is not particularly limited.

However, among the upper and lower stirring blades 1, the stirring blade 1a located at the uppermost stage is formed so as to be adjustable so as to rotate near the liquid surface of the liquid material 10 in the container 3. When the agitating blade 1a located at the uppermost stage rotates near the liquid surface, the powder immediately after being charged into the container 3 can be easily taken into the liquid resin. As the liquid resin or powder, it is assumed that various ones are used, and the height of the liquid surface of the liquid material 10 in the container 3 is not always constant because of the process. So container 3
By appropriately adjusting the liquid level of the liquid material 10 and the height of the uppermost stirring blade 1a, the uppermost stirring blade 1a is positioned near the liquid surface of the liquid material 10, and It is intended to always efficiently take in the liquid resin. Specific examples of such an adjustment method will be described later.

As a powder feeder, a screw conveyor B can be used to convey the powder toward the inside of the container 3 as in the prior art. Drying by exposing to a heat medium or the like is preferable because the liquid resin and the powder can be easily mixed. In the first place, since the powder has a very large surface area, moisture and the like in the air are easily adsorbed. In particular, when the temperature is low, the moisture and the like adsorbed on the powder are less likely to evaporate, and the powder may not be formed into a fine powder. Therefore, in winter or the like when the powder temperature decreases, the liquid resin and the powder are hardly mixed with each other, and the kneading operation takes a long time, which is extremely inconvenient.

Thus, for example, the above problem can be solved as follows. That is, the main part of the screw conveyor B is formed by the screw 6 and the powder transport tube 4. Here, the outer tube 5 is further covered substantially on the entire surface of the powder transport tube 4, and A space 7 is formed between the outer surface and the inner surface of the outer tube 5. In the outer tube 5,
The heat medium inlet 5 a and the heat medium outlet 5 b are provided so as to communicate with each other via the space 7. Then, a high-temperature heat medium is injected into the heat medium input port 5 a by a pump or the like (not shown), and the high-temperature heat medium flows through the space 7. During this time, the powder being transported is dried, and then the heat medium is discharged from the heat medium discharge port 5b. The discharged heat medium may be collected and returned to a high-temperature heat medium for reuse. Here, the heat medium is not particularly limited, and examples thereof include high-temperature air and hot water.

To use the screw conveyor B as a powder feeder, first, the powder discharge port 4b
The kneader A and the screw conveyor B are arranged so that the powder discharged from the container 3 is discharged into the container 3 from the powder supply port 3a of the container 3. Next, the powder is supplied from the powder input port 4a, and is conveyed through the powder conveying pipe 4 into the container 3 by the screw 6 and dried by the above-described method. Discharge inside.
In this manner, the powder is dried immediately before being charged into the liquid resin, that is, during the transportation, so that re-adsorption of moisture and the like can be prevented.

A rotating plate 8 rotatably formed in a substantially horizontal plane is disposed above the uppermost stirring blade 1a, and powder supplied from a powder supply port 3a receives the rotating plate 8. It is preferable that the ink be discharged onto the rotating plate 8. By doing so, it is possible to prevent the generation of lumps, which are granular clumps. That is, the conventional powder supply port 3a is fixed at one location, and the powder is often concentrated and injected at one location on the liquid surface of the liquid resin. For this reason, lumps are easily generated, and it takes a long time for the kneading operation. Therefore, FIG.
The rotary plate 8 is disposed at a position directly below the powder supply port 3a that is directed downward, and the rotary shaft 2 passes through substantially the center of the rotary plate 8 so that the rotary plate 8 It is fixed to the rotating shaft 2. When the rotating shaft 2 is rotated, the powder supplied from the powder supply port 3a once falls on the rotating plate 8 rotating at the same speed as the stirring blade 1, and is immediately out of the rotating plate 8 by centrifugal force. It is emitted in all directions toward. As a result, the powder uniformly falls on the liquid surface of the liquid resin, and the generation of lumps can be prevented. In this way, the contact area between the liquid resin and the powder at the time of supplying the powder is remarkably increased as compared with the related art, and as a result, the liquid resin and the powder can be easily mixed and the kneading can be promoted. It becomes.

The shape of the rotating plate 8 is basically a substantially circular disk in plan view, but may be a conical shape or an umbrella shape as shown in FIG. If the upper surface of the rotating plate 8 is formed as an inclined surface that is inclined downward toward the outside in this manner, there is no possibility that powder will accumulate on the rotating plate 8 even if the rotation of the rotating plate 8 becomes slow. Things.

Of the stirring blades 1 provided in the upper and lower stages, the stirring blades 1b and 1c except for the stirring blades 1a and 1d located at the uppermost stage and the lowermost stage are notched at the edges opposite to the rotation direction. 20 are preferably formed. In this way, irregular turbulence, that is, turbulence can be generated in the liquid material 10, and the contact area between the liquid resin and the powder can be further increased to promote kneading. It is. Specifically, as shown in FIG. 2, the conventional upper and lower four-stage stirring blades 1 have the second and third stirring blades from the top.
A plurality of cutouts 20 as shown in the figure are provided at one edge of the stirring blades 1b and 1c located at the stage.
The stirring blade 1 rotates the edge provided with the notch 20 backward. Here, the shape of the notch 20 is
It may be other than shown in the drawing, and is not particularly limited. In FIG. 2, members other than the stirring blade 1 and the rotating shaft 2 are not shown.

Further, the stirring blade 1d located at the lowermost stage includes:
It is preferable that a downward projection 9 as shown in FIGS. 1 and 2 is formed. The lower end of the projection 9 is located in the vicinity of the bottom surface of the container 3. In this case, liquid resin or powder lumps or the like mainly staying at the bottom of the container 3 are scraped up by the projection 9. 3 can uniformly disperse the liquid resin and the powder. Here, the number and shape of the projections 9 are not particularly limited.
May be obliquely downward.

Next, a method of raising and lowering the liquid surface of the liquid material 10 in the container 3 and the agitating blade 1a located at the uppermost stage and adjusting the height so that the heights thereof are adjusted will be described with reference to specific examples. This adjustment method is roughly classified into a method of raising and lowering the liquid surface and a method of raising and lowering the stirring blade 1a located at the uppermost stage.
Here, a method of raising and lowering the liquid level will be described first.

FIG. 3 shows a bag 2 formed to be inflatable and contractible.
This is an example in which the liquid level is raised and lowered by utilizing No. 1. In this case, a bag 21 is attached to the lower portion of the inner peripheral surface of the container 3 in addition to the configuration of the kneader A described above. The bag 21 is made of a material that has high airtightness and is not eroded by the liquid material 10 in the container 3. Further, it is formed under the high pressure in the liquid material 10 so that it can expand and contract.

Then, in order to raise the liquid level of the liquid material 10 in the container 3, the bag 21 may be supplied with compressor air or the like to expand the bag 21 in the liquid material 10. In order to lower the surface, air may be exhausted from the inflated bag 21 to shrink the bag 21 in the liquid material 10.
However, the bag 21 expands and contracts within a range not in contact with the stirring blade 1.

Here, for example, as shown in FIG.
When the liquid level of the liquid material 10 is lower than the topmost stirring blade 1a, the bag 21 in the liquid material 10 is expanded to raise the liquid level as shown in FIG. Then, the position of the liquid surface and the position of the uppermost stirring blade 1a are adjusted. By adjusting the amount of air supply or exhaust such as compressor air in this way, the above-described positioning can be performed accurately. In addition, since the air supply and exhaust devices, such as compressor air, can use a conventional thing,
These are not shown.

FIG. 4 shows an example in which the liquid level is raised and lowered by using a liquid level adjuster 22 formed so as to be able to move up and down. In addition to the structure of the kneading machine A, the liquid level adjuster 22 can be put into a portion of the liquid material 10 that does not come into contact with the stirring blade 1 or can be pulled out of the liquid material 10 to the outside. Is formed. Here, the liquid level adjuster 22 is not particularly limited, but a liquid having a larger volume can easily raise and lower the liquid level within a range that does not come into contact with the stirring blade 1 in the liquid material 10, and has a higher density. Is about the same as or higher than the liquid material 10, it is easier to put into the liquid material 10. Further, the liquid level adjuster 22 is formed so as to be fixed in place when the adjustment of the liquid level position is completed so that the liquid level adjuster 22 does not come into contact with the stirring blade 1 by swinging due to the rotation of the stirring blade 1 or the like. It is.

Then, in order to raise the liquid level of the liquid material 10 in the container 3, the liquid level adjusting body 22 is lowered to
In order to lower the liquid level, the liquid level adjusting body 22 may be raised and pulled up from the liquid material 10.

Here, for example, as shown in FIG.
When the liquid level of the liquid material 10 in the inside is below the uppermost stirring blade 1a, the liquid level adjuster 22 is
Then, as shown in FIG. 4 (b), the liquid level is raised to align the liquid level with the topmost stirring blade 1a. By adjusting the amount of elevation of the liquid level adjusting body 22 in this manner, the above-described positioning can be performed accurately. It should be noted that a conventional device for raising and lowering the liquid level adjusting body 22 can be used, and therefore these are not shown.

Next, a method for raising and lowering the stirring blade 1a located at the uppermost stage will be described.

FIG. 5 shows an example in which the stirring blade 1a located at the uppermost stage is moved up and down by using a magnet which can be moved up and down. The rotating shaft 2 is formed in a cylindrical shape with a bottom and is rotatably supported at the upper part of the container 3 and is slidably contacted with the gland packing 30 and the like, and the stirring blades 1b, 1 other than the stirring blade 1a located at the uppermost stage.
c, 1d are protruded from the rotating shaft 2 in the radial direction at an interval vertically. The stirring blade 1b located at the second stage from the top
A ring-shaped bearing portion 31 having an inner diameter substantially equal to the outer diameter of the rotating shaft 2 and formed to be slidable in the vertical direction is provided on the outer periphery of the rotating shaft 2 above. Further, the bearing 31
A plurality of agitating blades 1 are protruded from an outer peripheral surface in a radial direction,
A stirring blade 1a located at the uppermost stage is formed. A rod 32 having an outer diameter smaller than the inner diameter of the rotating shaft 2 is inserted into the rotating shaft 2 formed in a bottomed cylindrical shape. The rod 32 is held so as not to rotate in the horizontal direction and to be movable in the vertical direction. The method of raising and lowering the rod 32 is not particularly limited, and for example, a ball screw can be used. That is, a male screw is threaded on the outer peripheral surface of the upper part of the rod 32, and the nut 33 is screwed onto the male screw. The nut 33 is in the form of a gear and meshed with a gear 34 provided as necessary. The gear 34 is meshed with a gear 35 attached to a motor 36 that can rotate forward and reverse. In this way, the rotation of the motor 36
The power is transmitted to the nut 33 through the nuts 5 and 34. Then, depending on the rotation direction of the nut 33, the rod 3
2 can move up and down. Further, on the outer periphery of the lower part of the rod 32, a holding part 37 whose length in the vertical direction is substantially equal to that of the bearing part 31 is formed. One of the bearing portion 31 and the holding portion 37 is made of a magnet and the other is made of a metal attracted to the magnet, and thus the bearing portion 31 that can move up and down along the rotating shaft 2 is attached to the holding portion 37. Both are always at the same height via the rotating shaft 2 by being sucked. Here, members other than the bearing portion 31 and the holding portion 37, particularly the rotating shaft 2 and the rod 3
The members located near the bearing portion 31 and the holding portion 37, such as 2, are made of a material that does not hinder the attractive force between the bearing portion 31 and the holding portion 37.

Then, in order to align the position of the stirring blade 1a located at the uppermost stage with the liquid surface of the liquid material 10 in the container 3, the motor 36 is rotated forward and backward as appropriate to raise and lower the rod 32, and If the positions of the liquid and the liquid surface are adjusted, the uppermost agitating blade 1a that moves up and down together with the holding portion 37 will be at the same height as the liquid surface of the liquid material 10.

Further, in order to rotate the stirring blade 1, for example, the gear 39 is rotated by the motor 38 in the same manner as in the prior art, and the gear 41 is finally rotated by interposing other gears 40. What is necessary is just to make it rotate the rotating shaft 2 attached to. At this time, as shown in FIG. 6, a plurality of concave portions 2a are linearly provided on the outer surface of the rotating shaft 2 in the vertical direction, and a convex portion 31a is provided on the inner surface of the bearing portion 31 so as to be fitted therein. The bearing part 31 in the
If it does not rotate in the circumferential direction, but rises and falls in the vertical direction, the stirring blade 1a located at the uppermost stage surely rotates at the same speed as the rotating shaft 2. If the bearing portion 31 is slidable with respect to the rotating shaft 2, it is needless to say that the stirring blade 1a located at the uppermost stage and the rotating shaft 2 can be rotated at the same speed by a method other than the above. Absent.

According to the above method, the stirring blade 1 located at the uppermost stage
By raising and lowering a, the position with respect to the liquid surface of the liquid material 10 in the container 3 can be accurately adjusted, and the liquid material 10 can be kneaded efficiently. Note that other configurations are the same as those in FIG. 1, and thus description and illustration are omitted.

FIG. 7 shows an example in which the stirring blade 1a located at the uppermost stage is moved up and down using a cylinder. Rotary axis 2
Are formed in the shape of a bottomed cylinder, are pivotally supported at the upper part of the container 3, are slidably contacted with the gland packing 30, etc., and further have stirring blades 1b, 1c, 1d other than the stirring blade 1a located at the uppermost stage.
However, they protrude from the rotating shaft 2 in the radial direction at an interval vertically. On the outer periphery of the rotating shaft 2 above the stirring blade 1b located at the second stage from the top, a ring-shaped bearing portion 31 having an inner diameter substantially equal to the outer diameter of the rotating shaft 2 and formed to be slidable in the vertical direction. Is provided. Further, a plurality of agitating blades 1 protrude from an outer peripheral surface of the bearing portion 31 in a radial direction to form an agitating blade 1a located at an uppermost stage. A cylinder base 51 on which a plurality of lifting / lowering cylinders 50 are disposed is attached to the outer periphery of the rotating shaft above the stirring blade 1a located at the uppermost stage. An elevating rod 52 is formed in each elevating cylinder 50 so as to be able to move up and down in the vertical direction. The lower part of the elevating rod 52 is connected to the bearing 31.
Thus, the bearing portion 31 is integrated with the lifting rod 52.
Can move up and down. Here, a conventional hydraulic cylinder can be used for the lifting cylinder 50, the lifting rod 52, and the like. The hydraulic oil pipelines 53, 54 pass through the side surface of the rotary shaft 2 from the side surface of the lifting cylinder 50. Into the rotary shaft 2, is disposed upward in the rotary shaft 2, and is connected via a rotary joint 55 to a hydraulic source (not shown) and other hydraulic equipment.

In order to raise the position of the uppermost stirring blade 1a in the alignment between the uppermost stirring blade 1a and the liquid level of the liquid material 10 in the container 3, the lifting cylinder 50 in the lifting cylinder 50 must be positioned. What is necessary is just to control the oil amount and store the lifting rod 52 in the lifting cylinder 50 until it reaches the desired position. On the other hand, in order to lower the stirring blade 1a located at the uppermost stage, the lifting cylinder Is controlled by extending the lifting rod 52 from within the lifting cylinder 50 until the desired position is reached.

In order to rotate the stirring blade 1, for example, the gear 39 is rotated by the motor 38 in the same manner as in the prior art, and the gear 41 is finally rotated by interposing other gears 40. What is necessary is just to make it rotate the rotating shaft 2 attached to. At this time, the stirring blade 1a located at the uppermost stage can also rotate at the same speed as the rotation shaft 2 from the above configuration.

According to the above method, the stirring blade 1 located at the uppermost stage
By raising and lowering a, the position with respect to the liquid surface of the liquid material 10 in the container 3 can be accurately adjusted, and the liquid material 10 can be kneaded efficiently. Note that other configurations are the same as those in FIG. 1, and thus description and illustration are omitted.

FIG. 8 shows an example in which the stirring blade 1a located at the uppermost stage is raised and lowered by using a ball screw, an air brake or the like. The rotating shaft 2 is rotatably supported at the upper part of the container 3 and is slidably contacted with the gland packing 30 and the like, and the stirring blades 1b, 1c and 1d other than the stirring blade 1a located at the uppermost stage are vertically spaced apart from each other. 2 protrudes in the radial direction. On the outer periphery of the rotating shaft 2 above the stirring blade 1b located at the second stage from the top, a ring-shaped bearing portion 31 having an inner diameter substantially equal to the outer diameter of the rotating shaft 2 and formed to be slidable in the vertical direction. Is provided. Further, a plurality of agitating blades 1 protrude from an outer peripheral surface of the bearing portion 31 in a radial direction to form an agitating blade 1a located at an uppermost stage. The support piece 6 extends substantially radially from the side surface of the rotation shaft above the stirring blade 1a located at the uppermost stage.
In addition, the support piece 60 is provided with a through hole, and a ball screw 61 for elevating is inserted in a substantially vertical direction. However, the lifting ball screw 61 is rotatably held in a substantially horizontal plane by the support piece 60 so as not to be able to move in the vertical direction, and is further attached to the upper surface or lower surface (the lower surface in FIG. 8) of the support piece 60. The rotation in a substantially horizontal plane is appropriately restricted by the air brake 62. An air intake 62a is formed in the air brake 62 substantially outward in the radial direction, and braking is released by supplying air to the air brake 62 from the air intake 62a.
The lifting ball screw 61 can be made rotatable, and conversely, the supply of air is stopped to apply braking, and the lifting ball screw 61 can be made unrotatable. An elevating gear 63 is integrally formed on the upper part of the elevating ball screw 61, and a male screw is threaded on an outer peripheral surface of the lower part of the elevating ball screw 61. A female screw screwed into the male screw is threaded in the bearing portion 31. In this way, the lifting ball screw 61 and the bearing 31 are screwed together. Then, according to the rotation direction of the lifting ball screw 61 that rotates with the rotation of the lifting gear 63,
The bearing unit 31 moves up or down along the ball screw 61 for elevating and lowering, and the agitating blade 1a located at the uppermost stage can move up and down.

The lifting gear 6 is provided above the container 3.
3 is provided with a control gear 64 for rotating the control gear 3, an air motor 65 for rotating the control gear 64 in the normal and reverse directions, and a forward / backward cylinder 67 having an air supply pipe 66 and the like. The moving direction of the use rod 68 and the radial direction of the rotary shaft 2 are oriented in substantially the same direction. An attachment 69 is formed at the tip of the forward / backward rod 68, and the air motor 65, the air supply pipe 66, and the like are attached to the attachment 69 and move integrally with the forward / backward rod 68. can do. Here, the lifting gear 63 and the control gear 64, the air inlet 62 a and the air supply port 66 a of the air supply pipe 66 are held at the same height regardless of the rotation of the rotating shaft 2. I have. With such a configuration, the air motor 65, the air supply pipe 66, and the like may be attached to the forward / backward rod 68 by a method other than that illustrated.

Since the conventional hydraulic cylinder can be used for the forward and backward cylinder 67 and the forward and backward rod 68, the hydraulic oil pipeline, the hydraulic source and other hydraulic equipment are not shown. The air supply pipe 66 is a part of the air supply pipe, and an air supply source and other necessary equipment are not shown because conventional equipment can be used.

In order to match the position of the uppermost agitating blade 1a with the level of the liquid material 10 in the container 3, first, the elevating gear 63 and the control gear 64, and the air inlet 62a and the air inlet 62a The stirring blade 1 is stopped so that the supply ports 66a and the supply ports 66a are located substantially on the same radial direction. On this occasion,
For example, positioning sensors 70a, 70b and the like may be provided, for example, by performing positioning in advance, so that the vehicle can be automatically stopped at the above-described position. Then, the forward / backward rod 68 of the forward / backward cylinder 67
Is extended, the control gear 64 and the air supply pipe 66 are advanced, and the lifting gear 63 and the control gear 64 mesh with each other.
In addition, the air inlet 62a and the air supply port 66a are joined. Next, the air brake 62 is passed through the air supply pipe 66.
Supply air to the ball screw 6
1 is in a rotatable state. Note that the operation from the stop of the stirring blade 1 to this point is common to the case where the stirring blade 1a located at the uppermost stage is raised and the case where it is lowered.

Next, when the air motor 65 is rotated in one direction, the rotation is transmitted from the control gear 64 to the elevating gear 63, and the elevating ball screw 61 rotates integrally with the elevating gear 63, and The bearing 31 screwed to the ball screw 61 for use, that is, the stirring blade 1a located at the uppermost stage can be raised. Here, when the air motor 65 is rotated in the opposite direction to the above, the control gear 6 is rotated.
The rotation reverse to that described above is transmitted from the lifting gear 4 to the lifting gear 63, and the lifting ball screw 61 rotates integrally with the lifting gear 63, and the bearing portion 31 screwed to the lifting ball screw 61,
That is, the stirring blade 1a located at the uppermost stage can be lowered.

Thus, the stirring blade 1 located at the uppermost stage
a and the liquid level of the liquid material 10 in the container 3 is adjusted, and then the supply of air to the air brake 62 is stopped.
The lifting and lowering ball screw 61 is made unrotatable by braking. Lastly, the forward / backward rod 68 of the forward / backward cylinder 67 is contracted, and the control gear 64, the air supply port 66a, etc. are retracted to separate them from the up / down gear 63 and the air intake 62a. With the above, the alignment between the uppermost stirring blade 1a and the liquid surface of the liquid material 10 in the container 3 is completed, and the stirring blade 1 is in a rotatable state.

To rotate the stirring blade 1, for example, the gear 39 is rotated by the motor 38 in the same manner as in the prior art, and the gear 41 is finally rotated by interposing other gears 40. What is necessary is just to make it rotate the rotating shaft 2 attached to. At this time, the stirring blade 1a located at the uppermost stage can rotate at the same speed as the rotating shaft 2 from the above configuration.

According to the above method, the stirring blade 1 located at the uppermost stage
By raising and lowering a, the position with respect to the liquid surface of the liquid material 10 in the container 3 can be accurately adjusted, and the liquid material 10 can be kneaded efficiently. Note that other configurations are the same as those in FIG. 1, and thus description and illustration are omitted.

The above is a specific example of the method of raising and lowering the liquid surface of the liquid material 10 in the container 3 and the height of the agitating blades 1a located at the uppermost stage so that the heights of the two are equally adjusted. Also in the above, the height of the liquid level is detected by a liquid level meter or the like using an ultrasonic sensor, so that the above-described alignment can be automatically controlled. Such control can be performed by appropriately combining conventional devices in addition to the above-described configuration.

[0048]

As described above, the kneader according to the first aspect of the present invention comprises a container to which the liquid resin and the powder are supplied, and a rotary shaft disposed substantially vertically in the container. In a kneader comprising a plurality of upper and lower stirring blades projecting radially from the rotation shaft below the rotation shaft, the stirring blade located at the uppermost stage is in the vicinity of the liquid surface of the liquid material in the container. It is adjusted so that it rotates at the time, so that the powder is easily taken into the liquid resin by constantly stirring the vicinity of the liquid surface where many powders are floating at the time of powder supply with the uppermost stirring blade. Thus, the liquid resin and the powder can be efficiently kneaded, and the kneading operation can be completed in a short time.

According to a second aspect of the present invention, in addition to the first aspect, a heating medium for drying the powder is supplied to a screw conveyor for transporting the powder into the container.
The powder is dried just before being supplied into the container and becomes fine powder, and can be taken into the liquid resin in the container before re-adsorption of moisture etc. to promote kneading. is there.

According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, at the position directly below where the powder is supplied from the screw conveyor, the horizontal rotation is performed above the uppermost stirring blade. Because the rotating plate is arranged, the powder supplied into the container can be uniformly dispersed by the rotating plate over the entire liquid surface of the liquid resin, and the powder can be prevented from becoming lump. In addition, the contact area between the liquid resin and the powder is increased, so that kneading can be promoted.

According to a fourth aspect of the present invention, in addition to any one of the first to third aspects, of the stirring blades having a plurality of upper and lower stages,
Since a notch is formed at the edge opposite to the rotation direction on the stirring blade except for the stirring blades located at the uppermost stage and the lowermost stage, the turbulent flow is formed by the notch provided in the stirring blade in the liquid material in the container. It can be generated and can increase the contact area between the liquid resin and the powder to promote kneading.

According to a fifth aspect of the present invention, in addition to the constitution of any one of the first to fourth aspects, since a downward projection is formed on the lowermost agitating blade, it mainly stays at the bottom of the container. Lumps and the like of liquid resin and powder can be scraped up by the projections, and the liquid resin and powder can be uniformly dispersed.

According to a sixth aspect of the present invention, in addition to any one of the first to fifth aspects, the height of the liquid surface of the liquid material in the container is adjusted so as to be movable up and down. Regardless of the amount of liquid material, the level of the liquid material in the container can always be accurately adjusted to the same height as the uppermost stirring blade. And the kneading operation can be completed in a short time by efficiently kneading the liquid resin and the powder.

According to a seventh aspect of the present invention, in addition to the configuration of any one of the first to fifth aspects, the stirring blade located at the uppermost stage rotates at the same speed as the rotating shaft and moves up and down along the rotating shaft. Since it is formed so as to be movable, the stirring blade located at the uppermost stage can always be adjusted to the same level as the liquid level of the liquid material in the container, regardless of the amount of the liquid material in the container, The powder is easily taken into the liquid resin by the uppermost stirring blade, and the liquid resin and the powder are kneaded efficiently so that the kneading operation can be completed in a short time.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an example of an embodiment of the present invention.

FIG. 2 is a perspective view showing a stirring blade and a rotation shaft according to an example of an embodiment of the present invention.

FIG. 3 shows another example of the embodiment of the present invention,
(A) is a sectional view before the liquid level rises, and (b) is a sectional view after the liquid level rises.

FIG. 4 shows another example of the embodiment of the present invention,
(A) is a sectional view before the liquid level rises, and (b) is a sectional view after the liquid level rises.

FIG. 5 is a sectional view showing another example of the embodiment of the present invention.

FIGS. 6A and 6B show a rotating shaft and a bearing according to another example of the embodiment of the present invention, wherein FIGS.

FIG. 7 is a sectional view showing another example of the embodiment of the present invention.

FIG. 8 is a sectional view showing another example of the embodiment of the present invention.

[Explanation of symbols]

 A Kneader 1 Stirrer blade 1a Stirrer blade located at the uppermost stage 2 Rotary shaft 3 Container 10 Liquid material

Claims (7)

[Claims] 1. A container to which a liquid resin and a powder are supplied,
In a kneader comprising: a rotating shaft disposed substantially vertically in a container; and a plurality of upper and lower stirring blades projecting radially from the rotating shaft below the rotating shaft. A kneader, wherein the stirring blade located at the upper stage is adjusted so as to rotate near the liquid surface of the liquid material in the container. 2. The kneading machine according to claim 1, wherein a heating medium for drying the powder is supplied to a screw conveyor that conveys the powder into the container. 3. A rotating plate that is horizontally rotated at a position immediately below a position where powder is supplied from a screw conveyor, above a stirring blade located at an uppermost stage. 3. The kneading machine according to 2. 4. A stirrer having a plurality of upper and lower stirrers, except for the stirrer at the uppermost stage and the lowest stage, wherein a notch is formed at an edge of the stirrer opposite to the rotation direction. Item 4. A kneader according to any one of Items 1 to 3. 5. The kneader according to claim 1, wherein a downward projection is formed on the lowermost stirring blade. 6. The kneader according to claim 1, wherein the height of the liquid surface of the liquid material in the container is adjusted to be vertically movable. 7. The agitating blade positioned at the uppermost stage rotates at the same speed as the rotating shaft, and is formed so as to be vertically movable along the rotating shaft. The kneading machine according to the above.