JP2010099209A - Blade for trituration - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blade for trituration of a vacuum agitator for dental craftsman, performing agitation and trituration of mixing materials such as implant, gypsum or impression material in dental surgery under reduced pressure without uneven kneading. <P>SOLUTION: In the agitator, materials blown up to an outside upper part by centrifugal force are moved downward by a return piece and incorporated by a trituration blade side edge in agitation and trituration. In the structure, a central staircase-like hole 7 is provided to thereby prevent powder and liquid such as implant from adhering to the central part of the trituration blade, so that uneven kneading is reduced. The blade for trituration is used to hold down uneven kneading to the minimum, so that kneading can be performed to hardly affect curing of contents. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a mixing tool for a dental stirrer that stirs and kneads materials such as dental investment, gypsum, and impression material under reduced pressure.

Conventionally, a mixing mixer for a vacuum stirrer for dental technicians has been designed in consideration of mixing efficiency, cleanability, and stable mixing without uneven kneading, and has various forms.

The kneading honey shown in FIG. 1 has a shape in which the kneading honey side edge is folded and has a return piece at the upper end, and returns the material blown up to the outer upper part by centrifugal force during stirring kneading. It is structured to be moved downward with a piece and kneaded at the side edge of the kneading honey. However, since the holes through which the material passes are small, when kneading a material having high viscosity, the holes do not pass smoothly, and not only the kneading efficiency is deteriorated but also the torque applied to the kneading motor is increased. Further, since the peripheral speed of the center of the mixing honey becomes 0, if powder or liquid such as an investment material adheres to the center portion, it is not sufficiently stirred and kneaded and causes uneven kneading. Further, since the kneading side edge portion and the return piece have a direction, the shape is unsuitable for forward and reverse rotation stirring kneading. The kneading efficiency was poor.

Recently, however, a vacuum stirrer for dental technicians that performs preliminary kneading by rotating the kneading honey forward and reverse has been sold, and the shape of the kneading honey is only the edge as shown in FIG. It has a frame-like shape and does not have a return piece or the like at the side edge or upper end. When stirring and kneading is performed with these mixing honey, since the material blown up to the outer upper part by centrifugal force does not have the return pieces, it is not kneaded sufficiently and causes kneading unevenness. Moreover, since the shape of the honey is only the edge portion, it is easy to entrain bubbles, and as a result, residual bubbles remain.
Japanese Patent No. 3870989 discloses a stirrer provided with a pair of left and right stirrer blades provided with a peripheral edge of a stirrer blade with a slight gap along the inner peripheral surface thereof in a container for containing a material to be kneaded. The stirring blades occupy 7 to 80% of the area, and a plurality of through holes large enough to insert a fingertip are shifted to the left and right wings by approximately ½ step alternately in steps. In addition, an arc-shaped depression is provided in the peripheral edge of the stirring blade on the lateral extension of the partition between the through holes, and a return piece protrudes slightly above the horizontal line at the upper end of each stirring blade. The conventional unevenness was solved. However, in the arc-shaped depression, sufficient kneading is often not carried out and remains, and when powder or liquid such as an investment material adheres to the central part, it is not sufficiently stirred and kneaded and causes uneven kneading.
Japanese Patent No. 3870989

With conventional mixing honey, the holes through which the material passes are small, so when kneading a material with high viscosity, it does not pass through the hole smoothly, reducing the kneading efficiency and also requiring the torque of the kneading motor. Met. Further, since the peripheral speed of the center of the honey for mixing is 0, if powder or liquid such as investment material adheres to the center portion, the mixture is not sufficiently kneaded and causes uneven kneading. Further, since the kneading honey side edge and the return piece have a direction, the shape is unsuitable for forward and reverse rotation stirring kneading. Conventionally, the stirring material is often not sufficiently stirred, resulting in unevenness and balls, and fine stirring has been desired. Furthermore, the stirring material with insufficient stirring has an influence on the curing rate of the stirring material after stirring, and a constant curing rate cannot be obtained. Therefore, the operation of the stirring material is complicated. Further, when unevenness occurred in the stirring, unevenness was caused particularly in the reaction state, resulting in uneven curing. In particular, when a dental material or the like is used as a stirring material, when a precise impression is obtained as an impression material after stirring, an accurate impression due to mixing unevenness may not be obtained. Further, in the investment material and the plaster, when embedded wax or the like is embedded, if uneven curing occurs, the wax may be deformed, causing a problem.
When a plurality of stirring materials are put into a container and stirred, the portion initially adhering to the kneading honey is not sufficiently stirred, often causing unevenness of stirring, causing a problem. Similarly, the stirring material adhering to the container was not sufficiently stirred, and many remained.

In the case of mixing with a kneading mixture as shown in FIG. 2, since the material blown to the outer upper part by centrifugal force does not have a return piece, it is not kneaded sufficiently and causes kneading unevenness. It was. Moreover, since the honey has a shape only at the edge portion, bubbles are easily involved, and as a result, residual bubbles remain.

The present invention is a mixing tool for a dental stirrer that stirs and kneads stirring materials such as investment materials, gypsum and impression materials in dentistry under reduced pressure,
The honey for kneading
Attached to the rotary shaft of the rotary drive body having the axial direction of the hollow cylindrical container to which the stirring material is added and stirred and kneaded,
In the slag for mixing, which has a flat wing spreading left and right with respect to the rotation axis inside the hollow cylindrical container, and the wing is installed with a slight gap on the bottom and side walls,
The side wall of the flat blade is provided in parallel with the rotation axis, and the bottom surface of the flat blade is provided at a right angle to the rotation axis.
It has a central step-like hole in the approximate center of the flat plate-shaped mixing honey,
A lower stepped hole is provided in the lower stage of the left wing or right wing of the plate-shaped mixing honey, and a stepped hole is formed by connecting with the central stepped hole.
An upper hole is provided above the lower stepped hole, and a lower hole is provided on the opposite wing of the lower stepped hole.
The mixing honey is characterized in that an upper stepped hole is provided on the wing opposite to the upper hole above the lower hole.

In the present invention, the upper stepped hole is connected to the lower stepped hole and the central stepped hole to form a stepped hole,
The blade edge on the side wall side of the flat blade is bent to the opposite side to the rotation axis direction to form the blade edge,
Lower stepped hole, upper stepped hole, upper hole and lower hole are formed to reach the wing edge,
At the upper end of the blade edge, a turning piece is formed so that the stirring material does not cross the blade in the direction of the rotation axis,
At least one of the side walls of the lower stepped hole, upper stepped hole, upper hole, lower hole and central stepped hole constitutes a side parallel to the rotation axis,
The parallel sides of the lower stepped hole and the upper hole near the wing edge are located on a straight line,
The parallel sides of the upper stepped hole and the lower hole near the wing edge are located on a straight line,
At least one of the bottom and upper sides of the lower stepped hole, upper stepped hole, upper hole, lower hole and central stepped hole constitutes a side perpendicular to the rotation axis,
The lower stepped hole is closer to the bottom than the lower hole,
The upper stepped hole is closer to the upper surface than the upper hole.
The bottom of the lower step-like hole is closer to the bottom than the bottom of the lower hole,
The upper side of the lower step hole is closer to the bottom than the upper side of the lower hole.
The bottom of the upper step hole is closer to the top surface than the bottom of the upper hole.
The upper side of the upper stepped hole is closer to the upper surface than the upper side of the lower hole,
2. The kneading mixer according to claim 1, wherein the upper side of the lower hole is closer to the bottom surface than the bottom side of the upper hole.
The present invention relates to a mixing tool for a dental stirrer that stirs and kneads materials such as investing material, gypsum and impression material in dentistry under reduced pressure, and the left and right side edges of the kneading tool are kneaded. Folded in the direction opposite to the rotation direction when viewed from above, and has a return piece folded upward from the horizontal at the upper end of the side edge, and has a stepped hole in the center of the mixing honey. In addition, there is provided a mixing mixer for a vacuum stirrer for a dental technician, characterized in that a material passage hole is provided below the upper stepped hole and above the lower stepped hole.

If the kneading mixture of the present invention is used, kneading unevenness can be minimized and kneading can be performed to such an extent that the curing of the contents is hardly affected.
By providing the central stepped hole, the kneading honey of the present invention does not adhere to powder or liquid such as an investment material in the central portion of the kneading honey, and can reduce kneading unevenness. Further, by providing the stepped holes, the kneading motor can be kept at a small torque and the kneading efficiency is improved because the holes smoothly pass even when kneading a highly viscous material. Furthermore, by making the size of the upper stepped hole and the lower stepped hole larger than the size of the upper passage hole and the lower passage hole, the pressure fluctuation caused by the difference in the size of the investment material during mixing with stirring As a result, the kneading efficiency is improved because it flows in the vertical direction.
According to the mixing honey of the present invention, in the initial stirring state, the contents of the stirring material are immersed, and torque is required. In this case, since the lower step hole provided in the lower part is connected to the central step hole, the initial torque is reduced and the target stirring speed can be easily increased. From this, it is possible to suppress deterioration of the driving device and suppress power consumption.
When the agitation reaches the target speed, the agitated material is agitated on the side wall side by centrifugal force. However, in the wing state of the present invention, a pressure difference is generated between the upper and lower sides of the wing so that the agitated material moves upward or downward. Moving. In addition to rotation by centrifugal force, the blade can move the stirring material up and down, and can be easily stirred.
The efficiency of stirring is improved from the positional relationship and shape of the stirring blade of the present invention, and further from the positional relationship and shape of the holes.

  Hereinafter, preferred embodiments of the present invention will be described in detail, but the present invention is not limited thereto.

First, an outline of a vacuum stirrer for a dental technician will be described.
The dental stirrer is a device for stirring and kneading materials such as dental investment, gypsum and impression material under reduced pressure. Generally, the material for mixing and stirring, kneading material, and water and liquid, or the impression material, etc. are put into the kneading cup and mixed well. Covering the kneading cup lid with a honey, when installed in the instrument, the vacuum pump or vacuum generator is activated and the kneading cup is sucked. Next, the kneading motor is operated and stirring kneading is performed for a preset kneading time.

Next, the form of the mixing honey according to the present invention will be described.
FIG. 3 shows a front view of the mixing honey according to the present invention. In the figure, 1 is a right side edge, 2 is a left side edge, 5 is a stepped hole, 9 is an upper hole, and 10 is a lower hole. FIG. 4 shows a top view of the mixing honey according to the present invention. In the figure, 3 indicates a right turn piece and 4 indicates a left turn piece.
The left and right side edge portions 1 and 2 of the kneading honey are preferably folded in the direction opposite to the rotation direction when viewed from above the kneading honey, and the most preferable angle is 45 degrees. By this edge portion, the stirring material is pushed to the side wall, and the stirring material adhering to the side wall can be removed and guided to kneading. Furthermore, it is a powerfully mixed part. Moreover, it is preferable to have the left and right turning pieces 3 and 4 folded upward from the drive shaft plane at the upper end of the side edge portion, and more preferably, it is folded upward by 5 to 10 degrees. is there.
The stepped hole 5 includes an upper stepped hole 6, a central stepped hole 7, and a lower stepped hole 8. In FIG. 5, the stepped hole 5 includes a central stepped hole 7 and a lower stepped hole 8. As a preferable form, it is preferable that the upper stepped hole 6 and the central stepped hole 7 and the central stepped hole 7 and the lower stepped hole 8 are orthogonal to each other.
The size of the stepped hole 5 may be any size as long as the material can pass through, but a hole having a width of about 12 to 20 mm is preferable. The size of the upper hole 9 and the lower hole 10 is preferably smaller than the stepped hole 5.

A dental stirrer that stirs and kneads stir materials such as investing materials, gypsum, impression materials, etc. under reduced pressure is a device equipped with a kneading tool. In dentistry, the situation in the oral cavity is taken with an impression material, replaced with gypsum, and the prototype of the structure is made up with wax to create a restoration, and the lost wax method is used to produce the structure. To do. At that time, two materials such as dental impression material, dental gypsum, and dental investment material are kneaded, and many materials are used. Since these dental materials are used in the respective mills, there is a need for a kneader that they have in common. Furthermore, these kneaders are sufficient for dental impression materials, dental gypsum, and dental investment materials. There has been a demand for a kneading honey that exhibits its function.

The kneading honey is a kneading honey for stirring the stirring material in a stirring container (kneading cup) installed in a dental kneader. In general, it is rotated by one axis and stirred.
The stirring container (kneading cup) is a hollow cylindrical container, usually having a shape with a bottom provided on the side wall of the hollow cylindrical shape, and the lid is a rotating shaft connected to the drive unit on the upper part of the mixing honey. By inserting the mixing honey into the hollow cylinder, the lid on the upper part of the honey seals the hollow cylindrical container and confines the stirring material. It is preferable to improve the confidentiality between the lid and the hollow cylindrical container with rubber or the like.
Stirring material is put into this hollow cylindrical container and stirred and kneaded, but the rotational drive body direction in the axial direction of the hollow cylindrical container is set as the upper side. The fold attached to the kneader is attached to the rotating shaft, and the lid is connected to the driving device at the upper portion of the mixing honey and connected to the driving device.

The kneading honey has a flat wing extending left and right with respect to the rotation axis inside the hollow cylindrical container. The wings preferably have a thickness of 0.5 to 3 mm and 0.7 to 1.5 mm. When it is thin, it is deformed by the force of the driving device, and when it is thick, it is inconvenient to use. The wing is installed with a slight gap on the bottom and side walls. Sliding contact damages the container and wings, which is not preferable. The kneading does not work well in a large gap. This gap is 0.3 to 1.0 mm, preferably 0.3 to 0.5 mm. The gap is preferably a gap that is substantially equal to the side wall and the bottom surface. Or it is also preferable that the side wall is opening about 0.1-0.2 mm toward the opening part of a hollow cylindrical container.
The mixing honey has a flat plate shape, the side of the blade is provided in parallel with the rotation axis, and the bottom of the flat blade is provided at a right angle to the rotation shaft. This is because a substantially uniform gap is formed between the side wall and the bottom surface of the hollow cylindrical container.
A central stepped hole is provided in the approximate center of the flat plate of the mixing honey. This hole has a low kneading efficiency at the center, so that the initial stirrer material is prevented from adhering and remaining, and it can also be used as a hole to reduce the stir pressure applied by the stirrer material to the lower stepped hole. Used. The substantially central portion is in the vicinity of the drive shaft of the mixing honey, and is preferably provided with a width of about 5.0 to 20.0 mm, preferably about 10.0 to 15.0 mm, centering on the drive shaft.

A lower stepped hole is provided in the lower stage of the left wing or right wing of the flat plate-shaped mixing honey, and is connected to the central stepped hole to form a stepped hole. By being connected, the contents can be carried out from the measuring method to the center and stirred.
An upper hole is provided above the lower stepped hole. The upper hole has an effect of pushing the stirring material bounced up during stirring into the hole and further promoting kneading.
A lower hole is provided on the opposite wing of the lower stepped hole. The lower hole has an effect of pushing the stirring material flowing from the lower step-like hole into the hole during stirring and further promoting kneading.
An upper stepped hole is provided above the lower hole and on the opposite wing of the upper hole. Preferably, the upper stepped hole is connected to the central stepped hole to form a stepped hole. Even if it is not connected, the effect of the invention can be obtained, but it is preferable to connect when stirring in large quantities. Preferably, the upper stepped hole is connected to the lower stepped hole and the central stepped hole to form a stepped hole.

The blade edge portion on the side wall side of the flat blade is bent in the direction opposite to the rotation axis direction to form the blade edge portion. Stirring in the gap between the side wall of the stirrer vessel and the mixing hane further proceeds due to the bending of the blade edge, and the stirrer material in the vicinity of the stirrer vessel participates in the stirring.
A lower stepped hole, an upper stepped hole, an upper hole, and a lower hole are formed to reach the blade edge. Agitation is promoted by the lower stepped hole, the upper stepped hole, the upper hole and the lower hole reaching part of the blade edge. It is not preferred that these holes reach the side of the wing. This is because it affects the stirring with the side wall. It is preferable that about 30 to 10% and 25 to 15% of the area of each hole is formed in the blade edge portion. In these ranges, the mixing efficiency is improved.
A turning piece is formed at the upper end of the blade edge so that the stirring material does not cross the blade in the direction of the rotation axis. It is preferable that one side of the return piece is formed substantially along the inner wall of the hollow cylindrical container.

At least one of the side walls of the lower stepped hole, the upper stepped hole, the upper hole, the lower hole, and the central stepped hole constitutes a side parallel to the rotation axis. Preferably, each side wall of the lower stepped hole, the upper stepped hole, the upper hole, the lower hole, and the central stepped hole forms a side parallel to the rotation axis.
Parallel sides of the lower stepped hole and the upper hole near the blade edge are positioned on a straight line.
Parallel sides of the upper stepped hole and the lower hole in the vicinity of the blade edge are located on a straight line.
At least one of the bottom and upper sides of the lower stepped hole, the upper stepped hole, the upper hole, the lower hole, and the central stepped hole constitutes a side perpendicular to the rotation axis. Preferably, the bottom and upper sides of the lower stepped hole, the upper stepped hole, the upper hole, the lower hole, and the central stepped hole constitute a side perpendicular to the rotation axis.
The lower stepped hole is closer to the bottom surface than the lower hole. The lower stepped hole is preferably wider in the upper bottom direction than the lower hole.
The upper stepped hole is closer to the upper surface than the upper hole. The upper stepped hole is preferably wider in the upper bottom direction than the upper hole.
The bottom of the lower stepped hole is closer to the bottom than the bottom of the lower hole.
The upper side of the lower stepped hole is closer to the bottom surface than the upper side of the lower hole.
The bottom of the upper stepped hole is closer to the upper surface than the bottom of the upper hole.
The upper side of the upper stepped hole is closer to the upper surface than the upper side of the lower hole.
The upper side of the lower hole is closer to the bottom surface than the bottom side of the upper hole.
The corners of each hole are preferably processed into a round shape in order to improve cleanability.
These structures are important in order to eliminate stirring unevenness, and it is preferable to maintain these relationships.
Next, the action of the mixing honey according to the present invention will be described.
While stirring and kneading, the material blown up to the outside upper part by centrifugal force is moved downward with a return piece and is kneaded at the edge of the kneading honey side, but by providing a central stepped hole 7, The powder and liquid such as investment material do not adhere to the central portion of the kneading honey, and kneading unevenness is reduced. In addition, by providing the stepped holes 5, the kneading motor torque can be kept small because kneading through a hole smoothly even when kneading a material with high viscosity, and kneading efficiency is improved. Further, by making the size of the upper stepped hole 6 and the lower stepped hole 8 larger than the size of the upper passage hole 9 and the lower passage hole 10, the material such as the investment material becomes the size of the hole during the stirring and kneading. The kneading efficiency is improved because the fluid flows in the vertical direction due to the pressure fluctuation due to the difference between the two.

The present invention relates to a mixture for a kneading machine mounted on a dental kneading machine.

External view of conventional honey for mixing External view of conventional honey for mixing Front view of the mixing honey of the present invention Top view of the mixing honey of the present invention Front view of the mixing honey of the present invention

Explanation of symbols

1 right edge 2 left edge 3 right turning piece 4 left turning piece 5 stepped hole 6 upper stepped hole 7 central stepped hole 8 lower stepped hole 9 upper passage hole 10 lower passage hole

Claims (3)

A mixing tool for dental stirrers that stirs and stirs stir materials such as investing materials, gypsum and impression materials under reduced pressure.
The honey for kneading
Attached to the rotary shaft of the rotary drive body having the axial direction of the hollow cylindrical container to which the stirring material is added and stirred and kneaded,
In the honey for mixing, which has a flat wing extending left and right with respect to the rotation axis inside the hollow cylindrical container, and the wing is installed with a slight gap on the bottom and side walls,
The side of the flat wing is provided parallel to the rotation axis, and the bottom of the flat wing is provided perpendicular to the rotation axis.
It has a central step-like hole in the approximate center of the flat plate-shaped mixing honey,
A lower stepped hole is provided in the lower stage of the left wing or right wing of the plate-shaped mixing honey, and a stepped hole is formed by connecting with the central stepped hole.
An upper hole is provided above the lower stepped hole, and a lower hole is provided on the opposite wing of the lower stepped hole.
A honey for mixing, characterized in that an upper stepped hole is provided on the wing opposite to the upper hole above the lower hole. The upper stepped hole is connected to the lower stepped hole and the central stepped hole to form a stepped hole,
The blade edge on the side wall side of the flat blade is bent to the opposite side to the rotation axis direction to form the blade edge,
Lower stepped hole, upper stepped hole, upper hole and lower hole are formed to reach the wing edge,
At the upper end of the blade edge, a turning piece is formed so that the stirring material does not cross the blade in the direction of the rotation axis,
At least one of the side walls of the lower stepped hole, upper stepped hole, upper hole, lower hole and central stepped hole constitutes a side parallel to the rotation axis,
The parallel side of the lower stepped hole and the upper hole near the wing edge is located above the straight line,
The parallel sides of the upper stepped hole and the lower hole near the wing edge are located on the straight line,
At least one of the bottom and upper sides of the lower stepped hole, upper stepped hole, upper hole, lower hole and central stepped hole constitutes a side perpendicular to the rotation axis,
The lower stepped hole is closer to the bottom than the lower hole,
The upper stepped hole is closer to the upper surface than the upper hole.
The bottom of the lower step-like hole is closer to the bottom than the bottom of the lower hole,
The upper side of the lower step hole is closer to the bottom than the upper side of the lower hole.
The bottom of the upper step hole is closer to the top surface than the bottom of the upper hole.
The upper side of the upper stepped hole is closer to the upper surface than the upper side of the lower hole,
2. The mixing honey according to claim 1, wherein the upper side of the lower hole is closer to the bottom surface than the bottom side of the upper hole. In the knives of the vacuum stirrer for dental technician that stirs and kneads materials such as implants, gypsum and impression materials in dentistry under reduced pressure, the left and right side edges of the kneading honey are from above the kneading slats. It is folded in the direction opposite to the rotation direction as seen, and has a return piece folded upward from the horizontal at the upper end of the side edge, and further has a stepped hole in the center of the mixing honey, 2. The dental technique vacuum stirrer mixer according to claim 1, wherein a material passage hole is provided below the stepped hole and above the lower stepped hole.

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