JPS5839697Y2 - Dental high frequency centrifugal casting equipment - Google Patents

Description

[Detailed description of the invention] The present invention is based on commercially available dental casting alloys, such as Ni.
- A high melting point alloy such as Cr type or Co-Cr type is melted in a crucible using high frequency waves, and the dental casting alloy melted by rotating the whole crucible around a rotating shaft is poured into a mold by centrifugal force, The present invention relates to an improvement in a dental high-frequency centrifugal casting device for producing a cast product having a desired shape.

Conventionally, dental casting alloys such as those described above are melted in a crucible using high frequency waves, and the crucible is rotated around a rotating shaft to pour the melted dental casting alloy into a mold using centrifugal force to form the desired shape. The dental high frequency centrifugal casting apparatus used to form the cast product had the following structure.

1 and 2 are perspective views of a conventional dental high-frequency centrifugal casting apparatus, and FIG. 3 is a perspective view of the dental high-frequency centrifugal casting apparatus shown in FIG. 2 with the toggle lever pulled upward.

In the drawing, 21 is a device body M of a dental high frequency centrifugal casting device.
22 is a rotating shaft rotatably pivoted to the rotating bearing 21; 23 is a rotating base metal fitting fixed to the upper end of the rotating shaft 22;
4 is a crucible attached to a crucible mounting plate fixed at a position a certain distance from the rotating base metal fitting 23;
The sprue 24a is installed toward the side opposite to the center of rotation of the rotating base metal fitting 230.

Reference numeral 25 denotes a fixing rod fixed horizontally to both sides of the rotating base metal fitting 230, and has a male threaded portion 25a at the tip.
is formed.

Reference numeral 26 denotes a casting platform supported by the fixed rod 25, and a recess 26a that approximately matches the outer shape of the mold E is formed in the center thereof.

A mold mounting plate 27 is held at the rear end of the fixed rod 25, and is adjusted to move in the longitudinal direction of the fixed rod 25 by an adjustment fitting 28 screwed onto the male threaded portion 25a of the fixed rod 25.

Reference numeral 29 is attached to protrude from the opposite side of the mold mounting plate 27 of the rotating base metal fitting 23, and a counter weight 30 for balancing the rotating base fitting 23 with respect to the rotating shaft 22 is movably attached. This is the pole that is being held.

31 is used to attach the rod 29 to the rotating base metal fitting 2 when the rod 29 is slidably attached to the rotating base metal fitting 23.
This is a balance adjustment bundle that is fixed at a predetermined position.

Reference numeral 32 denotes a toggle lever which is pivotally attached to both sides of the rotating base metal fitting 230 so as to be freely rotatable about a shaft 32a, and whose free ends are connected to each other by a handle 32b; 33 is an intermediate part of the toggle lever 32; The lever is a comb-shaped lever having a U-shape in plan view, and long grooves 33a into which pins 32c protruding from the top are inserted are formed at predetermined intervals on both ends thereof.

34 is a mold holder attached to the center of the comb-shaped lever 32 via a spring 33b; 35 is a mold holder attached to the center of the comb-shaped lever 32;
This mold contact plate has a hole 35a connected to the sprue 24a of No. 4 and is fixed to the side surface of the rotating base metal fitting 23.

A conventional dental high-frequency centrifugal casting device has the above-mentioned configuration, but in the device shown in FIG. 26a, then rotate the adjustment fitting 28 screwed onto the male threaded portion 25a of the fixed rod 25 to move the mold mounting plate 27 along the fixed rod 25, and place the mold E on the mold. The retaining plate 27 and the mold retaining plate 35 are more firmly clamped to firmly hold the mold E on the rotary base metal fitting 23, and then the balance adjustment bundle 31 is used to balance the rotary base metal fitting 23 with respect to the rotating shaft 22.
Loosen the lever to slide the rod 29 into position, then move the counterweight 30 slightly to achieve complete balance, fix the counterweight 30, and tighten the balance adjustment bundle 31 to prevent the rod 29 from moving during rotation. Rotate to .

Preparations are completed by this operation, so a high frequency oscillation device (not shown) is used to oscillate a high frequency wave by placing a dental casting alloy in the crucible 24 and melting the dental casting alloy in the crucible 24 . The rotating shaft 22
The molten dental casting alloy in the crucible 24 is caused to flow into the mold E through the sprue 24a by centrifugal force, and then slowly cooled to produce a cast product of a desired shape.

However, in the case of such a conventional device, the mold E has to be firmly fixed to the rotating base metal fitting 23, and a troublesome operation must be performed to balance it with respect to the rotating shaft 22. In addition, the adjustment time is relatively long. It had the disadvantage of hitting too many targets.

In particular, in dental high-frequency centrifugal casting equipment, where the size and weight of each mold E is usually different, the troublesome operation of balancing each mold E as described above is required. What he had to do had become a fatal flaw.

On the other hand, in the device shown in FIG. 2, the toggle lever 32 is
By rotating the mold E around the center 2a, the mold E can be easily held firmly by the mold support 34 and the mold contact plate 35, and the fixing rod 25 can be easily held by the mold support 34 and the mold stopper plate 35, unlike the conventional device shown in FIG. Adjustment fitting 2 screwed onto male threaded portion 25a
Although it has the advantage of not having to rotate 8,
When the toggle lever 32 is rotated about the shaft 32a and pulled upward as shown in FIG. 3, the tip of the comb-shaped lever 33 is also pulled upward, resulting in an inclined state as a whole.

Therefore, when the mold E with a flat bottom is brought into contact with the mold holder 34 and the mouth of the mold E is placed on the mold contact plate 35 by the action of the spring 33b, the bottom part is lifted up, and the mold E is rotated. It had a drawback that it could not be held by the base metal fitting 23.

Moreover, after the mold E is held by the rotating base metal fitting 23,
The rotating base metal fitting 23 is balanced with respect to the rotating shaft 22 by the same operation as in the conventional device as shown in FIG. 1, and then a dental casting alloy is placed in the crucible 24 and a high frequency oscillation device (not shown) is used to oscillate a high frequency. , crucible 2
Rotating base metal fitting 23 after melting the dental casting alloy in 4
is rotated at high speed around the rotating shaft 22, and the crucible 2
After the molten dental casting alloy in No. 4 is poured into the mold E from the sprue 24a by centrifugal force, it is slowly cooled to produce a casting of the desired shape. When the mold E is held on the rotating base metal fitting 23, the bottom of the mold E is lifted up, and the mouth of the mold E and the sprue 24a of the crucible 24 are misaligned.

Furthermore, after holding the mold E on the rotating base metal fitting 23 in the same way as in the conventional device shown in FIG. 29 into the specified position,
Furthermore, the counterweight 30 must be slightly moved to achieve perfect balance, and the counterweight 30 must be kept constant, and the balance adjustment bundle 31 must be tightened to fix the rod 29 so that it does not move during rotation, which is a cumbersome operation. The flaws had not been eliminated.

The present invention eliminates the drawbacks of the conventional device as described above.
This invention relates to a dental high-frequency centrifugal casting device that allows a mold E to be held on a rotating base metal fitting easily and in a short time, and also simplifies the operation of balancing the rotating base metal fitting with respect to a rotating shaft.

More specifically, the present invention provides a dental high-frequency centrifugal casting apparatus that melts a dental casting alloy using high frequency waves and pours it into a mold using centrifugal force to produce a cast product having a desired shape.
A rotating shaft rotatably pivoted to a rotating bearing attached to a device main body, a rotating base metal fitting rotatably attached to the upper end of the rotating shaft, and a rotating base metal fitting fixed at a predetermined position on the upper surface of the rotating base metal fitting. a crucible with a sprue facing opposite to the center of rotation; a mold stopper plate having a hole connected to the sprue of the crucible and fixed to an end surface of the rotary base metal fitting; and the rotary base. A sliding rod is attached so as to be able to slide through cylinders that are fixed horizontally on both sides of the metal fitting, and a spring is attached to the inner surface of the sliding rod with both ends held at the rear end of the sliding rod. A mold holding plate is attached to the mold holding plate, a mold holding plate is supported by the end of the spring and has a hole bored in the center into which the attachment is inserted, and the sliding rod is attached to the rotating base metal fitting. A sliding mechanism that allows the rotary base metal to slide to a predetermined position, and a freely movable counterweight that is protrudingly installed on the side opposite to the mold presser of the rotary base metal and that balances the rotary base metal with respect to the rotating shaft. The present invention provides a dental high-frequency centrifugal casting device characterized by comprising a rod attached to the rod.

Hereinafter, the dental high frequency centrifugal casting apparatus according to the present invention will be explained in detail using the drawings.

FIG. 4 is a perspective view of one embodiment of the dental high-frequency centrifugal casting apparatus according to the present invention, FIG. 5 is a perspective view of the dental high-frequency centrifugal casting apparatus according to the present invention with a short mold attached, and FIG.
The figure is a perspective view of a state in which a long mold is also installed.

In the drawing, 1 is a rotary bearing attached to the main body M of a dental high-frequency centrifugal casting device, 2 is a rotary shaft rotatably attached to the rotary bearing 1, and 3 is a rotary shaft horizontally attached to the upper end of the rotary shaft 2. The fixed rotary base metal fitting 4 is a crucible fixed at a predetermined position on the upper surface of the rotary base metal fitting 3, and its sprue 4a is installed facing the side opposite to the rotation center of the rotary base metal fitting 3.

5 is a mold stopper plate having a hole 5a connected to the sprue 4a of the crucible 4 and fixed to the end face of the rotating base metal fitting 3;
are sliding rods that are slidably mounted through cylinders 6a that are horizontally fixed to both sides of the rotating base metal fitting 3.

By sliding this slide rod 6 to a predetermined position on the rotating base metal fitting 3 by the sliding mechanism 11, the mold holding plate 8 held at the rear end of the sliding rod 6 is moved onto the rotating base metal fitting 3.
Then, the mold E is held between the mold stopper plate 5 and the mold holder 10.

Reference numeral 8 denotes a mold holding plate whose both ends are held by the rear end of the sliding rod 6, and a spring 7 is attached to the center of the inner surface.

This spring 7 is used to provide cushioning properties to the mold holder 10.

Reference numeral 10 denotes a mold holder supported by the end of the spring I, and a hole 10a into which the attachment 9 is inserted is bored in the center.

Reference numeral 9 denotes an attachment that is installed between the bottom of the mold E and the mold holder 10 when the length of the mold E is short, and is prepared in advance so that the total weight of the mold E and the attachment 9 is constant. Please stop me.

11 pulls the sliding rod 6 toward the rotating base metal fitting 3 side and molds E.
It is a sliding mechanism for holding the mold between the mold support 10 and the mold contact plate 7, and is rotatably pivotally attached to both sides of the rotating base metal fitting 3, and mutually connected by a handle 14a at the free end of the rotation. The toggle lever 14 is connected to the toggle lever 14, and one end is rotatably connected to the intermediate part of the toggle lever 14 and the other end is rotatably connected to the front end of the sliding rod 6, and the toggle lever 14 is rotated. This is a sliding mechanism that is more sensitive to the connecting rod 15 that allows the sliding rod 6 to slide relative to the rotating base metal fitting 3 by movement.

Reference numeral 13 is a rod protruding from the side opposite to the mold holder 10 of the rotating base metal fitting 3, and 12 is a counterweight movably attached to the rod 13.

The dental high-frequency centrifugal casting device according to the present invention does not require the counterweight 12 to be moved significantly along the rod 13 as in conventional devices, so the rod 13 is slidably attached to the rotating base metal fitting 3. It is not necessarily necessary.

Therefore, the rod 13 is made male threaded, and the counterweight 12
The position of the counterweight 12 can be finely adjusted by screwing a female screw into the center of the shaft and screwing it onto the male screw of the rod 13, and rotating the counterweight 12. This is sufficient for balance adjustment.

Incidentally, reference numeral 16 denotes a mold mounting stand for preventing the mold E from dropping downward, and is fixed to the rotary base metal fitting 3 as necessary.

The dental high-frequency centrifugal casting apparatus according to the present invention has the above-mentioned configuration, and its usage will be explained below.

First, as shown in FIG. 5, the toggle lever 14 is pulled upward toward the mold support plate 8 to push the sliding rod 6 away from the rotating shaft 2, thereby increasing the distance between the mold support plate 5 and the mold support 10. Spread it out, hold the mold E with the width of the tongs, and insert it between the mold support plate 5 and the mold holder 10.

Next, align the opening of the mold E with the hole 5a of the mold stopper plate 5, hold the handle 14a of the toggle lever 14 with one hand, and rotate the connecting rod 14 toward the counterweight 12.
The sliding rod 6 is pulled toward the rotating shaft 2 via the mold support plate 5 and the mold support 10 to firmly hold the casting pot E.

In this case, if the length of the mold E is short, the protrusion of the attachment 9 is fitted into the hole 10a of the mold holder 10 as shown in FIG. 5, and the same operation is performed.

After the mold E is held in the rotating base metal fitting 3, the counterweight 12 is slightly moved along the rod 13 to balance the rotating base metal fitting 3 with respect to the rotating shaft 2, and then the dental casting alloy is placed in the crucible 4. After the dental casting alloy in the crucible 4 is melted by oscillating a high frequency wave using a high frequency oscillator (not shown), the rotating base metal fitting 3 is rotated at high speed around the rotating shaft 2.

The molten dental casting alloy in the crucible 4 is poured into the casting E through the sprue 4a by centrifugal force, and then slowly cooled to produce a cast in a desired shape.

As described above, the dental high-frequency centrifugal casting apparatus according to the present invention can easily and quickly hold the mold E on the rotating base metal fitting 3, and furthermore, even if the length of the mold E is different, It has the advantage that it can be used as is by simply attaching the attachment, and if the weight of the attachment is selected so that the total weight of the attachment and the mold is constant, the balance of the rotating base metal fitting with respect to the rotating shaft will be maintained. Since almost all of the balance has been taken, the balance adjustment can be completed with just a minute movement of the counterweight, and there is almost no time loss, which has great practical value.

[Brief explanation of drawings]

Figures 1 and 2 are perspective views of a conventional dental high frequency centrifugal casting machine, Figure 3 is a perspective view of the dental high frequency centrifugal casting machine shown in Figure 2 with the toggle lever pulled upward; FIG. 4 is a perspective view of an embodiment of the dental high-frequency centrifugal casting apparatus according to the present invention, FIG. 5 is a perspective view of the dental high-frequency centrifugal casting apparatus according to the present invention with a short mold attached, and FIG. 2 is a perspective view of a state in which a long mold is similarly installed. DESCRIPTION OF SYMBOLS 1... Rotating bearing, 2... Rotating shaft, 3... Rotating base metal fitting, 4... Crucible, 4a... Sprue, 5...
・Mold contact plate, 5a...hole, 6...sliding rod, 6a...
・Cylinder, 7... Spring, 8... Mold holding plate, 9... Attachment, 10... Mold holding, 10
a... Hole, 11... Sliding mechanism, 12... Counter weight, 13... L 14.) Glue lever,
14a... Handle, 15... Connecting rod, 16... Mold mounting stand, 21... Rotating bearing, 22... Rotating shaft, 23... Rotating base metal fitting, 24... Crucible, 24a
...Gate, 25...Fixing rod, 25a...Male thread part, 26...Mold mounting stand, 26a...Recess, 27...
・Mold holding plate, 28...adjustment fittings, 29...shank, 3
0... Counter weight, 31... Balance adjustment... handle, 32... Toggle lever, 32a... Shaft, 32b... Handle, 32c... Pin, 33... Comb-shaped lever, 33a...Long groove, 33b...Spring, 34...Mold holder, 35...Mold contact plate, 35a...
... Hole, M ... Device body, E ... Mold, T ... Tongs.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ In a dental high-frequency centrifugal casting device that melts a dental casting alloy using high frequency waves and pours it into a mold using centrifugal force to produce a cast product with a desired shape, a rotating device attached to the device body M is used. A rotating shaft 2 rotatably pivoted to a bearing 1, a rotating base metal fitting 3 fixed to the upper end of the rotating shaft 2, and a button fixed to a predetermined position on the upper surface of the rotating base metal fitting 3. A crucible 4 having a sprue 4a facing opposite to the center of rotation, and a mold stopper plate 5 having a hole 5a connected to the sprue 4a of the crucible 4 and fixed to the end surface of the rotating base metal fitting 3. , a sliding rod 6 that is slidably mounted through cylinders 6a that are horizontally fixed on both sides of the rotating base metal fitting 3, and both ends at the rear end of the sliding rod 6. a mold valve plate 8 which is held and has a spring 7 attached to its inner surface;
A cast presser foot 10 is supported by the end of the spring 7 and has a hole 10a in the center thereof into which the attachment 9 is inserted, and the slide rod 6 is fixed to the rotating base metal fitting 3 in a predetermined manner. Sliding mechanism 11 that slides to a certain position
and a counterweight 1 which is protrudingly installed on the opposite side of the rotary base metal fitting 3 from the mold valve valve 10 and is a button and which balances the rotary base metal fitting 3 with respect to the rotating shaft 2.
1. A dental high-frequency centrifugal casting device, characterized in that the rod 2 is movably mounted on the rod 13. 2. The sliding mechanism 11 is rotatably pivotally attached to both ends of the rotating base metal fitting 3, and a handle 14a is attached at the free end.
A toggle lever 14 is connected to the toggle lever 14, and one end is connected to the intermediate part of the toggle lever 14, and the other end is connected to a sliding rod 6.
A sliding mechanism comprising a connecting rod 15 which is rotatably pivotally attached to the front end of each of the connecting rods and which slides the sliding rod 6 relative to the rotating base metal fitting 3 by rotation of the toggle lever 14. A dental high-frequency centrifugal casting apparatus according to claim 1, which is a utility model.