JPH0345702Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a model trimmer for a dental laboratory, and more particularly to a wet model trimmer for a dental laboratory having an improved grinding disc portion.

(Prior Art) Conventionally, a model trimmer for dental technology has been used to grind and shape a dental plaster model in order to accurately set the dental plaster model in an articulator.

This general structure consists of a workbench on which the dental plaster model that is the object to be ground is placed, a casing with a front panel having a working opening window on the front, and a motor installed inside the casing. , and a dental model grinding disk part fixed to a rotating shaft of a motor, and the dental model grinding disk part has a grinding disk stacked on a grinding disk reinforcing support plate made of metal such as iron or aluminum. It is in a heavy state.

In addition, generally the grinding disk is made of silicon carbide,
It is formed by solidifying ceramic powder particles such as alumina and zirconia with a binder such as resin and glass, and is fixed to the motor rotation shaft by reinforcing and supporting the metal grinding disk reinforcing support plate as described above. be carried out.

In addition, to prevent ground gypsum dust from scattering into the air and entering the worker's respiratory system during work, water is injected from the water injection pipe inside the casing onto the dental grinding disc work surface. .

(Problem to be solved by the invention) However, in the case of resinoid grindstones and vitrified grindstones, which are obtained by bonding ceramic powder particles with a synthetic resin, a glassy binder, etc., the ceramic powder particles and the binder It is not easy to manufacture to ensure homogeneous mixing and homogeneous pressure forming, and the raw materials and manufacturing process are extremely costly, and even though the entire grinding disk is made of abrasive, There is a problem that because the tissue is not used until it is exhausted, a large amount of waste remains.

In addition, although the conventional model trimmer disk has sufficient compressive strength, it has low elasticity and is weak against bending stress, so when grinding a dental model, the model must be strongly pressed against the grinding disk surface to increase the grinding efficiency. If this is done, there are problems in that the grinding disk may crack and break, or it may break due to impact loads during loading and unloading during transportation of the grinding disk.

Therefore, the inventor of the present invention attempted to construct a substrate made of other materials and adhere a coated abrasive paper on top of the substrate instead of composing the entire grinding disk with abrasive material. It was found that those attached with adhesives were bent, warped, and deformed due to the difference in expansion rate or swelling during drying or when grinding dental models with water spraying.

This is particularly noticeable when a rubber plate is used as the substrate, resulting in the problem that the coated abrasive paper peels off from the disk substrate.

If such a deformed or warped grinding disk is used, the grinding disk will fluctuate during grinding of a dental model, making it difficult to grind a good dental model.

Additionally, if the dental model is strongly pressed against the grinding disk during the grinding process, slips may occur between the reinforcing support plate (retainer back plate) of the dental grinding disk and the grinding disk, making it impossible to perform effective and precise grinding. become unable.

Furthermore, in the case of a model trimmer for dental laboratories equipped with a front panel on the front, it is very complicated to select and replace grinding disks made of abrasives of various grain sizes depending on the work stage.

(Means and effects for solving the problem) The present invention was made to solve the problem, and includes a workbench part, a casing part equipped with a front panel having an opening window for work, A model trimmer for dental laboratory equipped with a motor installed in a casing part and a dental model grinding disc part fixed to a rotating shaft of the motor.
By configuring the dental model grinding disk part from a grinding disk reinforcing support plate and a grinding disk having an abrasive layer on both sides of the disk substrate,
This was created after discovering that it would be an excellent model trimmer for dental technology.

Furthermore, the present invention is such that the dental model grinding disk part is sandwiched between the grinding disk reinforcing support plate and the grinding disk with a clamping disk made of a soft elastic body in the above-mentioned dental laboratory model trimmer. It has been discovered that this method has advantages such as no slippage occurring between the grinding disk and the support plate.

In other words, the present invention includes a workbench, a casing part having a front panel having a working opening window on the front side, and a motor installed in the casing part.
In a dental laboratory model trimmer equipped with a dental model grinding disc part fixed to the motor rotating shaft, the dental model grinding disc part is equipped with: (1) grinding material on both sides of the grinding disc reinforcing support plate and the disc substrate; or (2) a grinding disk having an abrasive material layer on both sides of the grinding disk reinforcing support plate and the disk substrate;
This model trimmer for dental technology is comprised of a reinforcing support plate for the grinding disk and a holding disk made of a soft elastic material held between the grinding disk.

In the present invention, the abrasive material layer provided on the disk substrate surface may be formed by adhering an abrasive material onto the disk substrate surface with an adhesive, but it may also be formed using, for example, sandpaper, cloth emery material, etc. A commercially available coated abrasive paper may be attached.

Preferable examples of the coated abrasive paper include water-resistant sandpaper and sandpaper.

The abrasive layer can be used by appropriately selecting its particle size, hardness, strength, color, etc., depending on the intended use of the grinding disk. It is also possible to use abrasive layers with different characteristics (for example, different grain size and hardness) on the front and back surfaces of the grinding disk. A grinding disk having different grinding properties on the front and back surfaces has the advantage that a single grinding disk can provide a product with different machining performance, and its range of use can be expanded.

The abrasive particles used in the present invention include artificial abrasives and natural abrasives, such as silicon carbide, alumina, zirconia, emery, and garnet.

The grinding disk substrate that can be used in the present invention preferably has a certain degree of hardness and elasticity, such as rubber, especially raw rubber, synthetic resin,
FRP etc. are suitable.

In particular, the grinding disk substrate made of raw rubber has elasticity, so even if a strong pressing force is applied by pressing the model during grinding work, the grinding disk will not be affected by the pressure of the dental model. Since it follows the pressure to some extent and deforms and rotates with some repulsive force, it can exhibit extremely ideal grinding performance. Furthermore, it is not brittle and has excellent durability.

The thickness of the grinding disk substrate that can be used in the present invention can be selected as appropriate, and for example, when raw rubber is used, it can be about 2 to 10 mm.

In the present invention, the adhesive used to form the abrasive material layer on the disk substrate may be any commonly used adhesive as long as it has strong adhesive strength, and the type of the abrasive disk substrate to be formed. and is selected and used depending on the type of abrasive layer.

Examples include cyanoacrylate adhesives, epoxy adhesives, and the like.

In the present invention, the holding disk made of a soft elastic material and used between the grinding disk reinforcing support plate and the grinding disk is made of, for example, raw rubber, and does not come into contact with the grinding disk reinforcing support plate to cause slipping. A soft elastic material that does not damage the abrasive powder particles when it comes into contact with the abrasive layer is preferable.

A soft elastic disk made of raw rubber or the like is in contact with the grinding disk reinforcing support plate on one side to reduce slippage, and on the other side is in contact with the grinding disk reinforcing support plate to push abrasive powder particles in order to provide soft support. Do not damage grains.

The grinding disk reinforcing support plate of the present invention is made of metal such as iron or aluminum, and its shape is 2 to 5.
It may have a flat disk shape as shown in the figure, or it may have a ring-shaped upright wall formed on its outer periphery as shown in FIG. 6.

Preferably, the ring-shaped upright wall has an inner diameter corresponding to the diameter of the grinding disk.

Having such a ring-shaped upright wall prevents moisture from entering the back surface of the grinding disk when the grinding disk is attached, and the abrasive material layer on the back surface of the grinding disk due to water leakage. There is no possibility of peeling off during use, and no slipping occurs between the grinding disk and its support plate. This also serves as a reinforcement structure for the outer peripheral portion of the grinding disk reinforcing support plate.

(Example) An example of the model trimmer for dental technology of the present invention will be described in detail below based on the drawings.

Fig. 1 is a perspective view of the model trimmer for dental technology of the present invention, Fig. 2 is a partially cutaway horizontal cross-sectional view thereof, and Fig. 3 shows the grinding disk stacked on the grinding disk reinforcing support plate of the model trimmer for dental technology. Figure 4 is an exploded view of the grinding disk, the soft elastic clamping disc, and the grinding disk reinforcing support plate being pivotally attached, and Figure 5 is the grinding disc, clamping disc, and grinding disc reinforcement support. FIG. 6 is a sectional view showing a state in which the grinding disk is combined with a grinding disk reinforcing support plate having a ring-shaped upright wall and is mounted in the shaft.

In Figure 1, 1 is a motor and a grinding disk 2 rotates counterclockwise by the rotation of the motor.
It is a rectangular casing that houses the.

The casing 1 is made up of a front panel 3 housing a rotating grinding disk 2 and a main body 4 housing a drive mechanism such as a motor. The front panel 3 is fastened to the main body 4 with screws 5. Furthermore, as shown in FIG. 2, a partition plate 6 is provided to prevent water splashing within the front panel 3 from entering the main body 4 housing electrical equipment such as a motor. An opening 7 is bored in the partition plate 6, and a rotating shaft 8 that is connected to and rotates a motor housed in the main body 4 passes through the opening 7 of the partition plate 6 and connects to the front panel 3. protrudes inward.

Preferably, the screws 5 are fastener handle type screws that allow the front panel to be easily attached and detached. In this way, the grinding disk can be easily replaced, and the advantage of having an abrasive layer on both surfaces of the grinding disk can be further utilized.

The grinding disk 2 is inserted into the rotating shaft 8 through its mounting hole, and the threaded end portion and fixing screw 9 are inserted into the rotating shaft 8.
A cap 10 is attached thereon. Further, water is supplied to the grinding disk 2 from a water supply pipe 11 and sprayed onto the front surface of the grinding disk 2 in order to prevent the ground gypsum powder from scattering and to prevent heat generation. The sprayed water moistens the grinding disk 2 and is then drained from the drain pipe 12 together with the ground gypsum powder.

The object to be ground, such as a plaster model, is placed on the workbench 13 and brought into contact with the grinding disk 2 for grinding. Because it is small and has low work efficiency, the outer peripheral end surface 2b of the grinding disk 2
It is desirable to grind nearby to improve work efficiency. Therefore, the inner circumferential edge plate 3a of the opening 14 opened in the front panel 3 is bent inward to narrow the opening 14 inward and widen the outside to form an inclined plate 15. The inner edge is formed close to the outer peripheral end surface 2b of the grinding disk 2.

Inner peripheral edge plate portion 3 of opening 14 of front panel 3
By making a into such a structure, it is possible to work even near the outer peripheral end surface 2b of the grinding disk 2 without the hand holding the workpiece 16 hitting the inclined plate 15, and the outer peripheral end surface 2b of the grinding disk 2 Since the grinding work can be done at a nearby location with high work efficiency, the work can be done extremely efficiently. In addition, in terms of safety, since the inclined plate 15 is formed close to the grinding disk 2, fingers etc. will not be drawn in during operation.

However, the inclined plate 15 that is close to the grinding disk 2 is arranged at a predetermined distance from the inclined plate 15 because it makes it easier for the gypsum water scattered by the centrifugal force generated by the rotation of the grinding disk 2 to scatter outward from the inside of the front panel 3. A water scattering prevention plate 17 starting from the front panel 3 is placed on the front panel 3 apart from
The grinding disk 2 is formed so as to protrude beyond the
The hand holding the grinding object does not hit the water scattering prevention plate 17 even near the outer peripheral end surface 2b, thereby preventing gypsum water from scattering.

FIGS. 3 to 6 explain the state of the shaft attachment of the grinding disk 2 in the model trimmer and the structure of the grinding disk 2. FIG.

In Fig. 3, a synthetic resin adhesive is applied to both sides of a raw rubber grinding disk substrate (7 mm thick), a coated abrasive paper 22 is attached, and then it is punched out into a disk shape (diameter 230 mm). The prepared grinding disk 2 is stacked on a grinding disk reinforcing support plate 23 of a dental model trimmer, and is fixed to a rotating shaft 8.

The grinding disc itself used in this invention does not warp or deform, and also has the advantage of being able to use both sides.A model trimmer equipped with such a grinding disc is easy to use and has excellent performance. It has excellent machining performance and can achieve precise grinding. Further, the side in contact with the grinding disk reinforcing support plate 23 of the dental model trimmer is coated with abrasive paper 2.
2 and has a rough surface, so the grinding disk does not slip during grinding work.

Furthermore, the abrasive disc has a coated abrasive paper 22.
Since it can be manufactured by simply adhering it to the disk substrate 1, it is possible to easily provide many types of grinding disks by simply using the coated abrasive paper 22 by selecting the particle size, hardness, etc. of the abrasive powder particles. A model trimmer equipped with a grinding disc can easily provide different machining performances.

(Example 2:) Figures 4 and 5 show that the grinding disk in Figure 3 is
The raw rubber (thickness: 5 mm) 24, which is a clamping disk made of a soft elastic material having approximately the same diameter as the grinding disk, is attached to the mounting side of the dental model trimmer, that is, the grinding disk reinforcing support plate 23 of the dental model trimmer. It is placed in between and attached to the shaft.

With this configuration, the coated abrasive paper 22 surface of one side of the grinding disk sticks to the surface of the raw rubber so as to bite into it, and furthermore, one surface of the disk made of raw rubber is used as a reinforcing support for the grinding disk of the dental model trimmer. It comes into close contact with the plate 23. Therefore,
The grinding disk did not slip during the grinding process, and very good grinding performance was achieved.

On the other hand, when the grinding disk 2 having such a configuration is not attached to the dental model trimmer, the surface of the coated abrasive paper 22 and the raw rubber disk (clamping disk) 24
Therefore, it is possible to utilize both polished surfaces.

Elastic clamping disk 24 used in this example
is preferably made of raw rubber, and has a diameter approximately the same as that of the grinding disk 2 and a thickness of approximately 2 to 10 mm.

FIG. 6 shows an example of using a grinding disk reinforcing support plate with a special structure, in which the grinding disk 2 and the grinding disk reinforcing support plate 25 molded into a shape that fits snugly fit together, that is, its outer periphery. The model trimmer has a ring-shaped upright wall on its part, and is coupled to the model trimmer.

Furthermore, a non-slip washer 20 and a grinding disk retainer 19 are stacked on the tip of the rotating shaft 8.

In a model trimmer using such a grinding disk reinforcing support plate 25, water or the like will not enter between the grinding disk and the grinding disk reinforcing support plate, and the life of the grinding disk will be extended.

Since the ring-shaped upright wall serves as a reinforcing structure near the outer periphery of the grinding disk reinforcing support plate, it also has the effect of increasing the mechanical strength of the grinding disk reinforcing support plate.

In addition, there is no slippage between the grinding disk and the disk support plate, which not only provides excellent machining performance, but also prevents water from penetrating between the disk substrate and the abrasive layer, resulting in bonding. Since the surface is no longer affected, the service life of the grinding disk is extended and costs can be reduced.

(Effects of the invention) As described above, a model trimmer for a dental laboratory equipped with a grinding disk for a dental model trimmer in which an abrasive layer is formed on both sides of the grinding disk substrate of the present invention has a grinding disk of the model trimmer. Since no slip occurs between the support plate and the grinding disk, and the grinding disk itself is less warped or deformed, there is less distortion of the polished surface of the model trimmer equipped with it. Excellent grinding performance when using.

In addition, the grinding disk attached to the model trimmer can have the properties of different types of grindstones on both surfaces, so it is extremely convenient to be able to perform different grinding processes with one grinding disk. In addition, if a material with some degree of elasticity, such as raw rubber, is used as the grinding disk substrate, the grinding disk will be able to exhibit good grinding workability during grinding work, and will also have excellent durability. This will increase the durability of the product.

In the case of a model trimmer equipped with a soft elastic holding disc between the grinding disc and the support plate of the model trimmer, even if the dental model is strongly pressed during the grinding operation,
It has good grinding workability, with no slips occurring between the grinding disk and the support plate, and the motor of the model trimmer is less likely to be damaged.

As described above, the model trimmer for dental technology of the present invention exhibits excellent functions and effects not seen in the past.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the model trimmer for dental technology of the present invention, Fig. 2 is a partially cutaway horizontal sectional view thereof, and Fig. 3 shows the grinding disk stacked on the grinding disk reinforcing support plate of the dental model trimmer. Figure 4 is an exploded view of the grinding disk, the soft elastic clamping disc, and the grinding disk reinforcing support plate being pivotally attached, and Figure 5 is the grinding disc, clamping disc, and grinding disc reinforcement support. Fig. 6 is a cross-sectional view of the grinding disk in combination with a grinding disk reinforcing support plate having a ring-shaped upright wall on the outer periphery and the grinding disk is attached to the shaft. show. 1: Casing, 2: Grinding disk, 2a: Rotation center, 2b: Outer peripheral end surface, 2c: Rotation surface,
3: Front panel, 3a: Inner peripheral edge plate, 4: Main body, 6: Partition plate, 7: Opening, 8: Rotating shaft, 9:
Fixing screw, 10: Center cap, 11: Water supply pipe, 12: Drainage pipe, 13: Workbench, 1
4: opening, 15: inclined plate, 17: water scattering prevention plate, 18: front extension line, 19: grinding disc holder, 20: anti-slip washer, 21: grinding disc substrate, 22: abrasive sheet (abrasive coated paper) ), 2
3, 25: Grinding disk reinforcement support plate, 24: Clamping disk.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A workbench, a casing with a front panel having an opening for working, a motor installed inside the casing, and a dental appliance fixed to the motor rotation shaft. In the model trimmer for dental technology, the dental model grinding disc part is composed of a grinding disc reinforcing support plate and a grinding disc having an abrasive material layer on both sides of the disc substrate. Characteristic model trimmer for dental technology. (2) Utility model registration claim No. 1, characterized in that the dental model grinding disk part has a clamping disk made of a soft elastic material sandwiched between the grinding disk reinforcing support plate and the grinding disk. The model trimmer for dental technology according to item 1. (3) The model trimmer for dental technology according to claim 1 or 2, wherein the abrasive layer is coated abrasive paper. (4) The model trimmer for dental technology according to claim 3, wherein the coated abrasive paper is sandpaper. (5) The model trimmer for dental technology according to claim 3, wherein the coated abrasive paper is a cloth file. (6) The model trimmer for dental technology according to any one of claims 1 to 5, wherein the disc substrate is made of a rubber plate. (7) A utility model registration claim described in any one of claims 1 to 6, characterized in that the grinding disk reinforcing support plate has a ring-shaped standing wall on the outer periphery of the support plate. A model trimmer for dental laboratories. (8) The model trimmer for dental technology according to any one of claims 2 to 7, wherein the holding disc made of a soft elastic material is made of raw rubber. (9) The model trimmer for dental technology according to any one of claims 1 to 8, which is a registered utility model, characterized in that the front panel is removable using a fastener handle. (10) A workbench, a casing with a front panel having an opening for working, a motor mounted inside the casing, and a dental model grinding disc fixed to the motor rotation shaft. Further, the inner circumferential edge of the opening of the front panel is bent inward to form an inclined plate, and the inner edge of the inclined plate is formed close to the end surface of the rotating outer circumferential portion of the grinding disk portion, and the inclined A water scattering prevention plate is erected at a front panel part a predetermined distance outward from the plate, and the height of the water scattering prevention plate starts from the front panel and extends beyond the extension line of the sloped plate surface. 10. A model trimmer for a dental laboratory according to any one of claims 1 to 9, which is a model trimmer for a dental laboratory that has a distance of .