JP4580489B2 - Clay mill - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a kneader suitable for the production of ceramics and the like, in which the kneading part can be easily removed and the workability such as washing is remarkably improved.
[0002]
[Problems to be solved by the invention]
Normally, in the production of pottery and porcelain, raw materials such as clay, sericite and porcelain are coarsely crushed and weighed and mixed, pulverized and mixed with a wet ball mill, deironed and dehydrated, and kneaded well with a clay kneader. It has been molded since then. As for the kneaders, various products ranging from large for mass production to small for ceramics have been developed and put into practical use, but all of them are inconvenient to clean after use, and their improvement has been a problem. That is, since the kneading of the clay kneader is mainly performed by the screw, the screw blades obstruct the cleaning.
Also, if the screw was removed and cleaned, it had to be removed from the bearing portion and mounted again after cleaning, which was a very troublesome operation.
[0003]
On the other hand, several proposals have been made for the purpose of improving the cleaning performance of the kneader. For example, in the kneading machine proposed in Japanese Examined Patent Publication No. 6-43058, the rotor is divided into a rotor main body and a drive shaft and connected by spline fitting, and only the rotor main body is removed to be cleaned. For this reason, the trouble of removing the drive shaft from the bearing is saved, and the cleaning operation is greatly improved. However, spline fitting has the inconvenience that the direction of the kneading blades provided on the rotor body cannot be determined because the rotor body can be appropriately turned and fitted according to the number of teeth of the spline. In other words, in a kneader equipped with two or more rotors, the kneading blades of each rotor must be adjusted to an appropriate positional relationship for kneading. In spline fitting, this mutual positional relationship is unambiguous. Not determined. For this reason, when attaching a rotor main body to a drive shaft, the inconvenience which requires the special device for positioning, such as marking, arises. Further, since splines are provided on the rotor body and the drive shaft, there is a problem that the processing cost is increased.
[0004]
Therefore, in view of the above-mentioned problems of the prior art, the present inventor has intensively studied a kneading machine in which the kneading screw part can be easily attached and detached to improve the cleaning performance, and has reached the present invention.
[0005]
[Means for Solving the Problems]
The gist of the kneading machine according to the present invention is a kneading machine provided with at least two rotating bodies in parallel, the rotating body comprising a driving shaft, the driving shaft and its axis. It is composed of freely linked with cantilevered kneading portion detachable in direction, cylinder this connection is provided on the axial end of the cylindrical Jo凹 portion kneaded portion provided on the shaft end of the drive shaft fitting of the convex portion, and the insertion of the key into the key groove provided in the these cylindrical recess and the cylindrical projecting portion, made by, 1 the length of the cylindrical projecting portion of the length of the mixing section / 3 or more .
[0006]
Furthermore, in such a kneader, a through hole having at least a part of a screw hole is provided in the axis of the drive shaft .
[0007]
Further, the present invention is to provide a set bolt to be inserted into an annular slip prevention groove provided in the columnar convex portion through a set hole provided in the cylindrical concave portion .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the kneader according to the present invention will be described in detail based on the drawings.
[0009]
1 and 2 illustrate an example of the configuration of the kneading machine of the present invention, and FIG. 3 shows its appearance. The kneader 10 is provided with two rotating bodies 12 and 14 in parallel, and each rotating body 12 and 14 is divided into a drive shaft 16 and a kneading section 18.
The drive shaft 16 and the kneading portion 18 are connected by fitting a columnar convex portion 20 provided at the shaft end of the kneading portion 18 and a cylindrical concave portion 22 provided at the shaft end of the drive shaft 16, The set bolt 24 prevents the cylindrical protrusion 20 from coming off. The kneading part 18 is supported only by this fitting, and the front-end | tip part is not supported.
That is, it is supported in a so-called cantilever state.
[0010]
A screw blade 19 is provided on the front end side of the kneading portion 18, and a single leaf blade 21 is provided on the rear end side. The drive shaft 16 of the rotator 12 is supported by two bearings 26 and 28, and is driven to rotate by a motor 36 via gears 30 and 31.
Since the drive shaft 16 of the rotator 14 is driven via a gear 34 that meshes with a gear 32 attached to the rotator 12, the rotating direction of the rotator 12 and the rotator 14 is reversed and is inserted from the insertion port 38. It is set in a direction in which the blended raw material is sandwiched inside by both.
[0011]
As shown in FIG. 4, key grooves 40 and 41 extending in the axial direction are provided on the inner surfaces of the columnar convex portion 20 of the kneading portion 18 and the cylindrical concave portion 22 of the drive shaft 16. Then, if the columnar convex portion 20 is inserted into the cylindrical concave portion 22 while the key 42 is housed in the key grooves 40 and 41, the fitting state as shown in FIG. No slipping between the recesses 22 occurs. According to this connection method, unlike the spline fitting, the kneading portion 18 cannot be properly turned to be fitted to the drive shaft 16 and fitted only at the position where the key groove 40 and the key groove 41 are combined. Can't match. That is, the screw blade 19 and the single leaf blade 21 provided in the kneading unit 18 are always directed in a certain direction based on the key groove 41 of the drive shaft 16.
[0012]
Further, the columnar convex portion 20 is provided with an annular drop prevention groove 44, and the set bolt 24 can be inserted into the drop prevention groove 44 through a set hole 46 provided in the side portion of the cylindrical concave portion 22. Has been. If the set bolt 24 is inserted into the removal preventing groove 44, the columnar convex portion 20 cannot slide in the axial direction, and the withdrawal from the cylindrical concave portion 22 is prevented.
[0013]
According to the kneading machine 10 of this example, cleaning after use is performed as follows. First, the covers covering the kneading part 18 and the drive shaft 16 are removed. Then, the set bolt 24 is pulled out from the prevention groove 44, and the kneading part 18 is pulled forward. The two kneading parts 18 are sequentially removed and carried to a washing place for washing. The casing portion that has been opened after the kneading section 18 is removed is easily washed while attached to the kneader 10.
[0014]
The kneading part 18 after washing is attached to the drive shaft 16 by reversing the above-described removal procedure. That is, the columnar convex portion 20 of the kneading portion 18 is inserted into the cylindrical concave portion 22 of the drive shaft 16 while the key 42 is housed in the key groove 40 and the key groove 41. The key 42 may be embedded in the key groove 41 in advance, and the cylindrical convex portion 20 may be inserted using the key 42 as a guide, or the key 42 may be embedded in the key 42 and the key groove 41 may be used as a guide to form a cylinder. The convex part 20 may be inserted. After the insertion to a predetermined depth, the set bolt 24 is submerged in the set hole 46, and the tip thereof is inserted sufficiently deeply into the prevention groove 44.
[0015]
The screw blades 19 and the single leaf blades 21 provided on the rotating body 12 and the rotating body 14 are arranged out of phase with each other so as not to contact each other between the rotating bodies and to enhance the kneading effect. As described above, in the kneader 10 according to the present invention, since the connection state between the kneading unit 18 and the drive shaft 16 is uniquely determined, the kneading unit 18 is always returned to the same state even when the kneading unit 18 is repeatedly attached and detached. Therefore, the mutual positional relationship between the rotating body 12 and the rotating body 14 remains unchanged from the initial setting, and a predetermined kneading function is maintained. This feature is exhibited not only when there are two rotating bodies, but also with three or more rotating bodies, if these rotating bodies are synchronized and interlocked.
[0016]
The through hole 50 shown in FIG. 1 is a device for extruding the kneading part 18 from the rear when it is difficult to pull out the kneading part 18 from the drive shaft 16. As illustrated in FIG. 6, the extrusion bolt 48 is screwed into the through hole 50 and the tip of the extrusion bolt 48 comes into contact with the columnar convex portion 20 of the kneading portion 18 to be pushed out. The length of the extrusion bolt 48 is made longer than the through hole 50.
[0017]
In the present invention, the kneading portion 18 and the drive shaft 16 are connected by fitting the columnar convex portion and the cylindrical concave portion. Whether the columnar convex portion is provided in the kneading portion 18 or the drive shaft 16 is determined. It doesn't matter. In the clay kneader 10 shown in FIG. 1, the columnar convex portion 20 is provided on the kneading portion 18, but the columnar convex portion 20 may be provided on the drive shaft 16 as shown in FIG. 7. However, preferably, the cylindrical concave portion 22 is provided in the drive shaft 16 and the columnar convex portion 20 is provided in the kneading portion 18.
[0018]
In general, a considerable amount of force is required to knead the ceramic raw material, and a large bending stress is applied to the kneading portion 18 of the rotating body 12. Therefore, in order to stably support the kneading portion 18 in a cantilever manner, the supporting portion must be sufficiently thick and long to withstand this bending stress. That is, in the present invention, it is necessary to use a sufficiently thick columnar convex portion 20 and a sufficiently long fitting portion with the cylindrical concave portion 22. The inventor has conducted several experiments and found that it is sufficient that the length of the columnar convex portion 20 is 1/3 or more of the length of the kneading portion 18.
[0019]
When the columnar convex portion 20 is provided in the kneading portion 18, the sufficiently long columnar convex portion 20 can be inserted under the bearings 26, 28 and the gears 32, 31 that support the drive shaft 16. By using the thick drive shaft 16, it is possible to insert a sufficiently thick cylindrical convex portion 20. On the other hand, when the columnar convex portion 20 is provided on the drive shaft 16, the columnar convex portion 20 must be inserted into the kneading portion 18 that is directly subjected to bending stress. Therefore, the long cylindrical convex portion 20 is inserted and kneaded. Decreasing the bending strength of the portion 18 must be avoided. Further, the thickness of the kneading part 18 is optimally set from the viewpoint of the kneading function, and there is a limit to making the kneading part 18 thicker in order to insert the thick cylindrical convex part 20.
[0020]
Therefore, the present invention is preferably carried out by providing the cylindrical concave portion 22 on the drive shaft 16 and the columnar convex portion 20 on the kneading portion 18. However, in a kneader that is used for a low-viscosity blending material or particularly small and has a small load, the columnar convex portion 20 is provided on the drive shaft 16 and the cylindrical concave portion 22 is provided on the kneading portion 18. May be implemented.
[0021]
The above has been described in detail based on the kneader illustrated in FIG. 1, but the present invention is not limited to the above-described examples and citations, and the configuration of the kneader is within the scope not departing from the gist thereof, What can be implemented with various improvements, modifications, and deformations regarding the material, configuration and shape of the rotating body, the method of connecting the kneading part and the drive shaft, the drive system, the material, shape and arrangement of the kneading blades, etc. It is.
[0022]
【The invention's effect】
According to the kneader according to the present invention, since the rotating body is divided into the kneading part and the drive shaft, and the kneading part is supported in a cantilever state, only the kneading part can be removed forward and easily cleaned. . Further, the kneading part and the drive shaft are connected by fitting the columnar convex part and the cylindrical concave part and inserting a key into a key groove provided in the convex part and the concave part. Even if the attachment / detachment is repeated, the positional relationship between the kneading blades provided in different rotating bodies always returns to the same state, and a predetermined kneading function is maintained without causing troubles such as contact.
[0023]
In particular, if the kneading part and the drive shaft are connected by fitting a columnar convex part provided in the kneading part and a cylindrical concave part provided in the drive shaft, a thick and long columnar convex part is obtained. Since they can be fitted, even a kneading part that is cantilevered can sufficiently withstand a large bending stress.
[0024]
In particular, if the shaft center of the drive shaft is provided with a through hole at least a part of which is a screw hole, a bolt is screwed into the through hole to push out the kneading portion, and the kneading portion is easily removed from the drive shaft. be able to.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of a configuration of a kneading machine according to the present invention and showing a main part in cross section.
FIG. 2 is a top view of the structure of the kneader shown in FIG. 1 according to the present invention.
FIG. 3 is an external side view of the kneader shown in FIG. 1 according to the present invention.
FIG. 4 is a side view illustrating a method of connecting a kneading unit and a drive shaft according to the present invention.
5 is a cross-sectional view showing a fitting state between the kneading part and the drive shaft shown in FIG. 4 according to the present invention.
FIG. 6 is a side view schematically illustrating a method for extruding a kneading part using a through hole according to the present invention.
FIG. 7 is a side view for explaining another connection method of the kneading section and the drive shaft according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10: Kneading machine 12, 14: Rotating body 16: Drive shaft 15: Screw shaft 18: Kneading part 19: Screw blade 20: Cylindrical convex part 21: Single leaf blade 22: Cylindrical concave part 24: Set bolt 26, 28: Bearings 30, 31, 32, 34: Gear 36: Motor 38: Loading port 40, 41: Key groove 42: Key 44: Removal prevention groove 46: Set hole 48: Extrusion bolt 50: Through hole

Claims (3)

A kneading machine provided with at least two rotating bodies in parallel, each rotating body being detachably connected to a drive shaft and the drive shaft in the axial direction thereof and cantilevered. are composed of a kneading section, the coupling is fitted between the cylindrical shaped convex portion provided at the shaft end of the kneading portion and the cylindrical Jo凹 portion provided at the shaft end of the drive shaft, and, the It is made by inserting a key into a key groove provided in a cylindrical concave portion and a columnar convex portion, and the length of the columnar convex portion is 1/3 or more of the length of the kneading portion, Clay kneading machine. The kneading machine according to claim 1, wherein a through hole, at least part of which is a screw hole, is provided in an axis of the drive shaft. 3. The set bolt according to claim 1, further comprising: a set bolt that is inserted into an annular drop prevention groove provided in the columnar convex portion through a set hole provided in the cylindrical concave portion. Clay kneading machine.

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