JP4293785B2 - Method for kneading viscous material and kneading tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The invention according to claim relates to a method and a kneading tool for kneading (mixing or kneading) viscous materials.
[0002]
[Prior art]
Alginate impression materials are commonly used for taking impressions (tooth shapes) in dental treatment and for replicating dentures. The alginate impression material is used by kneading a certain amount of water and an alginate powder (kneaded to increase viscosity), or after kneading alginate processed into two types of paste. Both have the property of curing in a few minutes after kneading.
[0003]
The kneading of the conventional alginate impression material is performed manually or by a dedicated mixer. In the case of manual work, water and powder are put into a rubber cup and kneaded uniformly with a spatula for about 30 seconds. Since the impression material is viscous, it is necessary to knead it rather than just mix it. On the other hand, when using a special blender, water and powder are put into a cup, and the put material is kneaded by rotating or shaking the cup. The kneaded impression material is taken out from the cup and used.
[0004]
These kneading methods are often used when kneading a small amount of alginate impression material to be used in the oral cavity, but are inconvenient for kneading a large amount of alginate impression material required for, for example, denture replication. was there. Since the alginate impression material cures in about 2 minutes and 30 seconds from the start of kneading, considerable skill is required to reliably perform a large amount of kneading by hand. Further, if a dedicated mixer is used, skill is not required, but the amount that can be kneaded is small, and it is insufficient in quantity for replicating dentures. The price of the equipment is expensive, and the cup is vibrated, which makes it easy for bubbles to enter.
[0005]
One of the devices capable of kneading a large amount of viscous material is a vacuum kneader that is mainly used for kneading gypsum (for a model) or casting investment material in a vacuum. One example is disclosed in Patent Document 1 below.
[0006]
As shown in FIG. 7 (reference numeral 1 ′), the vacuum kneader of Patent Document 1 is equipped with a stirrer 3 ′ in a container 2 ′ containing a viscous material. The stirring tool 3 'has a pair of stirring blades (blades) 10' extending from the shaft 7 'on both sides, and can be connected to the rotating means 17' via a connecting tool 6 'at the top of the shaft 7'. A shaft 7 'is rotatably inserted into a lid 5' for sealing the container 2 ', and a suction hole 9' is also provided. Each stirring blade 10 'is provided with an opening 11' in a stepwise manner. Each stirring blade 10 'is not a flat plate, but is bent in the middle of the radial direction as shown in FIG. 8 (a). Further, as shown in FIG. 8 (b), at the upper edge near the outer periphery. The return piece 18 'is provided substantially horizontally.
[0007]
Kneading using the vacuum kneader 1 'of FIG. 7 is performed as follows. First, the viscous material is put in the container 2 ′, and the stirring tool 3 ′ is inserted and sealed with the lid 5 ′. The connecting tool 6 'is connected to the rotating means 17' and the stirring tool 3 'is rotated together with the shaft 7' by the driving force of the rotating means 17 'to knead the viscous material. At this time, the air in the container 2 'is extracted from the suction hole 9' by a vacuum pump (not shown) so that the viscous material does not contain bubbles. The kneading is completed in about 30 seconds. After kneading is completed, the lid 5 'is removed from the container 2', the stirring tool 3 'is pulled out, and the kneaded viscous material formed in the container 2' is taken out with a spatula and used.
The gypsum and the like adhering to the stirring tool 3 'is used together with the kneaded material in the container 2' after pouring off the vibrator to the lid 5 '.
[Patent Document 1]
Japanese Patent Laid-Open No. 10-328208
[0008]
[Problems to be solved by the invention]
When a viscous material is kneaded with the above-described dental vacuum kneader, it is possible to obtain a kneaded viscous material in a large amount and homogeneously with less bubbles, compared with the case of kneading with a hand mixer or a blender dedicated to an alginate impression material. However, there is a disadvantage when kneading a material having a high viscosity such as an alginate impression material. Since the alginate impression material has a high viscosity, it tends to adhere to the stirring blade by kneading and cannot be washed off even if a vibrator is used. Since the curing time is short, there is no time for scraping with a spatula or the like with a complicated stirring blade having a conventional shape. Therefore, a large amount of kneaded alginate impression material was wasted.
[0009]
Accordingly, the claimed invention takes these points into consideration, and provides a kneading method and a kneading tool for a viscous material that can be kneaded homogeneously and without bubbles without reducing the waste of the viscous material. With the goal.
[0010]
[Means for Solving the Problems]
In the kneading method of the viscous material according to claim 1, the unkneaded viscous material is put in a container, a rotatable blade is inserted into the container and a lid is put on, and the inside of the container is evacuated (a low pressure state close thereto) In the kneading method of the viscous material, in which the blade is rotated and the viscous material is kneaded, the disk provided with the slit is inserted in advance into the base of the blade with the blade inserted into the slit (before the blade is placed in the container). And after the kneading (one performed as described above), the lid and the blade are removed from the container, and then the disc is removed from the blade to scrape the viscous material attached to the blade. Features.
[0011]
According to the method of this claim, it is possible to reduce as much as possible the waste of the viscous material that has conventionally occurred by the method of kneading the viscous material by rotating the blade. Kneading is performed by rotating the blade in the container with the blade passed through the slit of the disk, and after the kneading is completed, the slit acts as a scraper and adheres to the blade by simply removing the disk from the blade. This is because the kneaded viscous material can be scraped off.
[0012]
For this reason, when this method is used for kneading that requires only a small amount of a material having a high viscosity and easily adhering to the blade, such as an alginate impression material for dental treatment, the effective utilization rate of the material is greatly improved. Therefore, it is particularly effective in reducing waste of viscous materials and costs.
[0013]
Further, in the case of an alginate impression material, since the blade is rotated and kneaded, skill required for manual kneading is not required, and anyone can obtain a homogeneously alginate impression material. In addition, since it is kneaded in vacuum (or in a low pressure state), an alginate impression material that does not contain bubbles is obtained, and a special syringe or the like that has a function of pushing out the air inside is not necessary, and a general container is used. be able to.
[0014]
In addition to the above-mentioned alginate impression material, this kneading method includes dental treatment materials such as gypsum and casting investment materials, and various materials whose waterproofness is not limited (waterproof caulking materials, adhesives, etc.) It can also be applied to kneading. Conventionally, after gypsum is kneaded, the blade is vibrated with a vibrator to remove the adhered gypsum, but if this method is used, the labor is not required.
[0015]
  inventionThe viscous material kneading method is to put an unkneaded viscous material into a container, insert a rotatable blade into the container, cover the container with a vacuum, and rotate the blade to knead the viscous material. After the kneading is finished, after removing the lid and the blade from the container, a scraper with a slit is inserted from the side so that the base of the blade enters the slit, Scrub the viscous material adhering to the blade by moving it along and pulling it out from the tip of the bladeCan also be. In order to facilitate insertion of the slit of the scraper, it is preferable that the blade is flat or at least a plurality of blades are parallel at the base.
[0016]
  thisAlso by the method, the kneaded viscous material adhering to the blade can be scraped off by a simple operation in which the scraper (slit) is inserted into the blade and moved after completion of the kneading. Therefore, it is still possible to reduce waste as much as possible in the past for viscous materials such as alginate impression materials. In addition, it is the same as the kneading method of the said claim also in the point which can perform preferable kneading | mixing operation | work easily.
[0017]
  Claim 2The kneading tool described in 1 includes a container for storing an unkneaded viscous material, a rotatable blade for kneading the viscous material, a vacuum pump for discharging air in the container, and a rotating means for the blade. A kneading tool for viscous material having a slit in which the blade can be inserted from the tip to the base, and a disk that can be rotated together with the blade with the blade inserted into the slit. Features.
[0018]
According to such a kneading tool, the kneading method according to claim 1 can be effectively carried out, and the above-described effects can be obtained. Further, if the size of the container and the blade is changed, an amount of viscous material can be kneaded as required. The disk may determine the position during kneading (at the base of the blade) by the frictional force of the slit against the blade, but may be fixed to the blade using the action of a magnet.
[0019]
When the width of the slit of the disk is appropriately provided, the viscous material can be scraped off so that almost no viscous material remains on the blade, so that the viscous material adhering to the blade can be easily removed and collected. Since the structure of the disk is flat and simple, the disk can be easily cleaned. Such a disk may be made of metal or synthetic resin, for example.
[0020]
It is preferable that the blade is formed on an axis with respect to the center of rotation so as to perform a stable rotational movement. Furthermore, it is desirable that an appropriate opening be provided in the blade piece of the blade so that the viscous material can be kneaded quickly and uniformly.
[0021]
  InventionThe kneading tool for the viscous material is formed with a slit that can be inserted from the side at the base of the blade, and the scraper that can be moved from the base to the tip along the blade and then withdrawn from the slit is the disc Comes instead ofCan also be configured as. In order to facilitate insertion of the slit of the scraper, it is preferable that the blade is flat or at least a plurality of blades are parallel at the base.
[0022]
  According to this kneading tool,Of the above inventionThe kneading method can be carried out, and the above-described effects can be obtained. In order to remove and collect the viscous material adhering to the blade particularly effectively, it is better to set the width of the slit in the scraper properly. The point that it is good to provide an openingaboveThe same as the kneading tool. In order to make it easy to insert the slit of the scraper, it is preferable to configure the blade in a flat plate shape, or to make a plurality of blades parallel at least at the base.
[0023]
  Claim 3The above-mentioned viscous material kneading tool further comprises a pair of blade pieces each having a width about the radius of the container (about 0.5 to 1.5 times the radius inside the container). One edge of the piece is arranged close to the inner peripheral surface of the container, and each wing piece is arranged alternately in parallel across the rotation center (for example, as shown in FIG. 3B), The upper part of the wing piece is fixed to a support part that is rotationally driven by a rotating means.
[0024]
In order to prevent uneven kneading, the gap between the edge of the blade (the edge along the container) and the inner peripheral surface of the container is preferably narrow. If this point is emphasized and the blade is composed of one wing piece extending from the center of rotation to both sides, when using a disk as described above, it is difficult to mount a solid disk. This is because the width of the blade is close to the diameter of the container, and if a slit into which such a blade can be inserted is provided in the disk, the disk is almost divided by the slit and the strength of the disk is insufficient.
[0025]
In the kneading tool according to this claim, the blade is composed of two wing pieces, and the wing pieces are alternately arranged in parallel across the center of rotation, so that the interval between the two wing pieces can be widened. it can. As a result, when a disk is used, the slits are provided so as to be alternately cut from the peripheral edge of the disk (for example, as shown in FIG. 4A, the portion other than the slit is S-shaped or reverse S-shaped). Therefore, the disk is not formed in a divided state by the slit.
[0026]
The kneading tool of this claim is also advantageous when a scraping tool is used instead of the above-described disk. Since a pair of blades are arranged in parallel, a simple scraper (for example, as shown in FIG. 5) having slits formed in parallel is inserted from the side of the blade so that the base of the blade enters the slit. This is because it can be easily inserted. Then, the viscous material on the blade surface can be removed and collected by simply moving the scraper straight along the blade to the tip.
[0027]
In addition, each wing piece is arranged close to each other so that the gap with the inner peripheral surface of the container is as small as possible (including the case where each wing piece is placed in contact with the inner peripheral surface of the container). It is possible to knead effectively including the viscous material along the peripheral surface.
[0028]
7 and 8 do not have a rotating shaft integrated with the blade, but each blade piece of the blade is fixed to the supporting portion that is rotationally driven by the rotating means. Along with this, the blade also rotates.
In addition, when kneading a viscous material, it is desirable to rotate the blade in a direction in which each blade piece is deformed inward. This is because when the blades are deformed due to resistance by kneading the viscous material, they do not hit the container too strongly.
[0029]
  Claim 4Like the viscous material kneading tool described in the above, each blade piece is preferably formed of a synthetic resin (polypropylene or the like). In this case, the size of each wing piece may be determined so that the outer edge and lower edge of each wing piece are in contact with the inner surface of the container.
[0030]
If each blade piece is made of a synthetic resin, it will bend more appropriately than a metal plate because of the resistance that each blade piece receives from a viscous material during kneading, so that each blade piece will rub the inner peripheral surface of the container. (Ie, in an ideal manner similar to that obtained by skilled manual work). As a result, it becomes possible to knead the viscous material particularly uniformly. Each wing piece may be embedded in a resin support portion in the above-described arrangement, or the two wing pieces and the support portion may be integrally molded.
Alginate impression materials can be easily scraped off from the blade with a disk or scraper after kneading is completed, and unlike metals, they do not adhere to synthetic resins (especially polypropylene) after curing. (It peels off very easily), so there is a special merit in forming the wing piece with synthetic resin.
[0031]
  Claim 5As described above, the pair of blade pieces and the support portion may be integrally formed of a single metal plate.
[0032]
  Two pieces of wingsClaim 3By arranging the blade as in the kneading tool, the viscous material can be kneaded well even if the blade piece is formed of a flat plate. Since the wing piece may be a flat plate, for example, as shown in FIG. 3 (a), a metal plate obtained by integrally punching two wing pieces and a rectangular support portion is perpendicular to each boundary as shown in FIG. 3 (b). The blade can be formed only by bending, and the manufacturing is easy and the cost is low. In particular, when stainless steel is used as the material, it is difficult to rust, so maintenance management is easy.
[0033]
  Furthermore,Claim 6The viscous material kneading tool described in 1 is characterized in that a rubber cup is mounted inside the container.
[0034]
The rubber cup is easily deformed, so if you put a viscous material in the rubber cup and knead, there will be no gap between it and the spatula used to take out the kneaded viscous material, and you can take out the viscous material without waste. Can be used.
[0035]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the invention is shown in FIGS.
FIG. 1 is a cross-sectional view of the kneading tool 1. As shown, the kneading tool 1 includes a container 2 for containing a viscous material, a blade 3 for kneading the viscous material by rotating in the container 2, and a disk 4 for scraping the viscous material attached to the blade 3. The container 2 is composed of a lid 5 that can seal the container 2.
[0036]
The lid 5 is rotatably provided with a shaft 7 that can be connected to a rotation motor (not shown) via a connector 6 and a packing 8 so that the container 2 can be sealed. The lid 5 is provided with a suction hole 9 so that the air in the container 2 can be extracted by a vacuum pump (not shown).
[0037]
The blade 3 is composed of a pair of blade pieces 10 whose width is about the radius of the container. Each blade piece 10 is formed with two large and small openings 11 so that the viscous material can be kneaded efficiently. At this time, it is desirable to arrange the openings 11 having the same size on the left and right in order to obtain a good kneading result.
[0038]
Each wing piece 10 is fixed at right angles to both sides of a horizontal and rectangular support portion 12 as shown in FIG. 2 so that the gap between the edge portion extending from the outside to the lower portion and the container 2 is minimized. If the width of the support portion 12 is too narrow, the strength of the disk 4 described later decreases, and if it is too wide, kneading unevenness may occur. Since the support portion 12 is fixed to the shaft 7 with a retaining screw 13, the connecting tool 6, the shaft 7, the support portion 12, and the blade piece 10 are rotated by a rotating means (not shown; see reference numeral 17 'in FIG. 7). The viscous material in the container 2 is kneaded by the blade piece 10 by rotating integrally.
[0039]
When the two blade pieces 10 and the support portion 12 are formed by punching them out of a metal plate in a shape in which they are integrated as shown in FIG. 3A and bending them at right angles at respective boundaries shown by two-dot chain lines, Easy and low cost. Here, a stainless steel plate having a thickness of about 0.2 mm is used as the metal plate, but the thickness and material are not limited to these.
[0040]
The disk 4 fitted to the blade 3 is a circular flat plate in which two slits 14 are formed as shown in FIG. If the gap between the slit 14 and the blade piece 10 is narrow, the viscous material adhering to the blade piece 10 can be scraped cleanly. become. Therefore, the width of each slit 14 is set wider by 0.1 to 0.3 mm than the thickness of the blade piece 10. FIG. 4B is a perspective view showing a state in which such a disk 4 is mounted on the blade 3. The material of the disk 4 may be metal or synthetic resin.
[0041]
The position of the disk 4 fitted to the blade 3 may be determined by friction between each blade piece 10 and the slit 14, but a magnet 15 is attached to the center of the disk 4 and the magnet 15 is applied to the retaining screw 13. It is preferable to fix the disk 4 by this. If the support portion 12 is a stainless steel plate made of a magnetic material, the magnet 15 can be directly applied to the support portion 12 and fixed. In this case, the support portion 12 may be fixed to the shaft 7 by an adhesive, welding, brazing or the like instead of the fastening screw 13.
[0042]
In the kneading tool 1, the rubber cup 16 is mounted in a state of being in close contact with the inside of the container 2 as shown in FIGS. Since the rubber cup 16 is easily deformed, when the kneaded viscous material is scooped with a spatula, a gap with the spatula is hardly generated, and the viscous material can be taken out without waste. It is also possible to remove the rubber cup 16 from the container 2 after completion of the kneading and take out the kneaded viscous material from the rubber cup with a spatula. Needless to say, smooth kneading can be performed without using a rubber cup.
[0043]
Hereinafter, the procedure for kneading the viscous material by the kneading tool 1 will be described by taking as an example the case of kneading the powdered alginate impression material with water.
{Circle around (1)} First, a rubber cup 16 is placed inside an empty container 2, and alginate powder (two spoons for exclusive use) and water (40 ml) are weighed in order and placed in the container 2. In order not to leave the unkneaded powder, a temporary kneading is performed for about 5 seconds by mixing the powder and water with a spatula and allowing them to blend.
[0044]
(2) The blade 3, that is, the pair of wing pieces 10 is passed through the slits 14 of the disk 4, and the disk 4 is slid and inserted until the magnet 15 of the disk 4 is fixed to the fixing screw 13 of the support portion 12. .
[0045]
(3) Insert the blade 3 into the container 2 (rubber cup 16) and attach the lid 5. In addition, the coupling tool 6 is coupled to a rotating means (not shown) and the suction hole 9 is connected to an intake portion (not shown) to the vacuum pump. The vacuum pump is turned on to bring the inside of the container 2 to a low pressure state close to vacuum, and the rotating means is activated to rotate the blade 3 clockwise (right rotation as viewed from above), and kneading is performed for about 30 seconds. Since the kneading is performed in a vacuum, a good alginate impression material free of bubbles can be obtained. Since the rotation direction is rightward, each blade piece 10 can be prevented from being bent toward the inside of the container 2 and hitting the rubber cup 16.
[0046]
{Circle around (4)} After kneading is completed, the lid 5 and the blade 3 are removed from the container 2 and the disk 4 is pulled out from the blade 3, so that the kneaded alginate impression material adhering to the blade 3 can be scraped off by the slit 14. The alginate impression material adhering to the disk 4 is put into the rubber cup 16 by cutting it off at the edge of the container 2. Since both the wing piece 10 and the disk 4 are flat plates, almost no alginate impression material remains and the material can be used effectively. The alginate impression material in the rubber cup 16 can also be easily removed with a spatula and used for treatment and technical work.
[0047]
As a means for scraping off the alginate impression material adhering to the blade piece 10 of the blade 3 after completion of the kneading, a scraper 24 shown in FIG. 5 may be used in place of the disk 4 described above. The scraper 24 has a grip portion 24a that can be grasped by hand and a tip portion 24b including two slits 34a and 34b, and has a shape similar to a fork for a table. is there.
[0048]
The scraper 24 is configured so that the tip part 24b is brought close to the two wing pieces 10 of the blade 3 from the side, and each wing piece 10 can be put into the slits 34a and 34b. Yes. The width of the slits 34a and 34b is slightly larger (about 0.1 to 0.3 mm) than the thickness of the blade piece 10, and the length of the slits 34a and 34b (depth from the tip 24b) is between each other. Is very different. The lengths of the slits are different because the positions of the blades 10 with respect to the tip 24b are greatly different from each other when the blades 10 are inserted into the slits 34a and 34b from the side.
[0049]
After the kneading is finished, the scraper 24 (each slit 34a, 34b) is inserted into the base of the blade 3 (each blade piece 10) removed from the container 2, and the scraper 24 is moved from the base toward the tip. By moving, the kneaded alginate impression material adhering to the blade 3 can be scraped off. When the scraper 24 is used, it is not necessary to attach the disk 4 to the blade 3 in advance.
[0050]
Further, instead of the metal blade 3 shown in FIGS. 1 and 3, etc., for example, a resin blade 23 as shown in FIG. 6 may be used. In the blade 23 of FIG. 6, two wing pieces 30 made of a polypropylene plate having a thickness of 0.5 to 1.0 mm are integrated under the support portion 32 which is a thick polypropylene circular plate. Is. Since the support part 32 is rotationally driven together with the shaft 7, the blade piece 30 also rotates. The outer edge of the wing piece 30, that is, the radially outer edge and the lower edge are sized and shaped so as to contact the inner surface of the container (reference numeral 2 in FIG. 1). In FIG. 6, reference numeral 31 denotes an opening formed in the blade piece 30.
[0051]
When kneading an alginate impression material using such a resin blade 23, a) the blade piece 30 rotates substantially in contact with the inner surface of the container 2 while being appropriately bent, so that efficient kneading is performed. B) Since the alginate impression material is easily peeled off from the resin wing piece 30, there is an advantage that it is particularly easy to collect the impression material and clean the blade 23.
[0052]
【The invention's effect】
  Claim 1According to the method for kneading a viscous material described in the above, the viscous material kneaded in a vacuum without containing bubbles can be used as easily and effortlessly as possible. In particular, the cost burden when kneading with a highly viscous material can be greatly reduced. Moreover, skill is not required for the kneading operation.
[0053]
  Claim 2According to the viscous material kneading tool described in the above, the above effect can be obtained by effectively carrying out the kneading method of claim 1.The
[0054]
  Claim 3According to the viscous material kneading tool described in the above, the mechanical strength of the disk for scraping the viscous material from the blade can be ensured. There is also an advantage that a scraper having a simple structure can be easily inserted into a pair of blades.
[0055]
  Claim 4According to the viscous material kneading tool described in (1), since the blade is appropriately bent, more uniform kneading can be performed. There is also an advantage that the alginate impression material can be easily removed from the surface of the blade piece.
[0056]
  Claim 5According to the viscous material kneading tool described in the above, the blade can be easily manufactured and the cost can be reduced. Since the structure of the blade is simple, it is easy to insert or remove a disk or scraper from the blade.
[0057]
  Claim 6According to the viscous material kneading tool described in the above, the kneaded viscous material can be easily taken out without waste.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a kneading tool 1 which is an embodiment of the invention.
FIG. 2 is a longitudinal sectional view of the kneading tool 1 showing a state in which the blade 3 of FIG. 1 is rotated 90 degrees.
FIG. 3 (a) is a plan view in which a pair of blade pieces 10 and a support portion 12 of the blade 3 are integrally punched from a metal plate, and FIG. 3 (b) shows the two blade pieces. It is a perspective view which shows the state bent so that 10 might become parallel.
4A is a plan view of the disk 4, and FIG. 4B is a perspective view showing a state in which each blade piece 10 of the blade 3 is inserted into each slit 14 of the disk 4. FIG.
5 is a plan view showing the scraping tool 24. FIG.
6 is a perspective view showing a blade 23 and the like different from those in FIG. 1 and the like. FIG.
FIG. 7 is a sectional view of a conventional dental vacuum kneader 1 '.
8 (a) is a side view of the stirring tool 3 'of FIG. 7, and FIG. 8 (b) is a plan view thereof.
[Explanation of symbols]
1 Kneading tool
2 containers
3.23 Blade
4 discs
5 lid
6 Connecting tools
7 Shaft
8 Packing
9 Suction hole
10.30 Wings
11.31 opening
12.32 Support part
13 Fastening screw
14 Slit
15 Magnet
16 Rubber cup

Claims (6)

In the kneading method of the viscous material, the unkneaded viscous material is put into a container, a rotatable blade is inserted into the container and the container is evacuated and the container is evacuated, and the blade is rotated to knead the viscous material.
A disk provided with a slit is attached in advance to the base of the blade with the blade inserted into the slit, and after kneading is completed, the lid and the blade are removed from the container, and then the above disk is extracted from the blade. A method for kneading a viscous material, characterized by scraping off the viscous material adhering to a blade. A viscous material kneading tool having a container for storing an unkneaded viscous material, a rotatable blade for kneading the viscous material, a vacuum pump for discharging air in the container, and a rotating means for the blade. There,
A viscous material kneading tool, wherein a slit capable of inserting a blade from a tip portion to a base portion is formed, and a disk capable of rotating with the blade in a state where the blade is inserted to the base portion is attached to the slit. The blade includes a pair of wing pieces having a width approximately equal to the radius of the container, and one edge of each wing piece is disposed close to the inner peripheral surface of the container, and each wing piece sandwiches the center of rotation. 3. The viscous material kneading tool according to claim 2, wherein the viscous material kneading tool is arranged in parallel with each other, and an upper portion of each blade piece is fixed to a support portion that is rotationally driven by a rotating means. The viscous material kneading tool according to claim 3, wherein each of the blade pieces is made of a synthetic resin. 4. The viscous material kneading tool according to claim 3 , wherein the pair of wing pieces and the support portion are integrally formed of a single metal plate. The viscous material kneading tool according to any one of claims 2 to 5 , wherein a rubber cup is attached to the inside of the container.

Images