KR101248630B1 - Casting apparatus of dental prosthesis having easy decision of optimum casting timing and casting method thereof - Google Patents

Abstract

PURPOSE: A casting apparatus for a dental prosthesis for easily determining an optimal casting timing and a casting method thereof are provided to easily and accurately determine a casting timing, thereby casting a dental prosthesis without casting defects. CONSTITUTION: A casting apparatus for a dental prosthesis for easily determining an optimal casting timing manufactures the dental prosthesis as follows: An investment material fills the inside of a casting ring, and the investment material is hardened so that a cast(60) can be formed; a wax pattern manufactured into the shape of a dental prosthesis is housed inside the investment material; and molten metal, in which a molten material is melted, is injected into a mold from which the melted wax pattern is removed. A settling portion(61) is formed inside the cast, and the molten material is settled on the settling portion. A concave housing portion(62) is formed inside the settling portion, and at least one injecting port is formed on the bottom of the housing portion. A supporting ring for supporting the molten material upwardly protrudes on the top of the cast.

Description

Dental prosthesis casting device and its casting method which is easy to determine the optimum casting timing {CASTING APPARATUS OF DENTAL PROSTHESIS HAVING EASY DECISION OF OPTIMUM CASTING TIMING AND CASTING METHOD THEREOF}

The present invention relates to an apparatus for casting a dental prosthesis and a casting method thereof, and more particularly, it is possible to easily cast the dental prosthesis by judging the optimum casting timing, so that an optimum casting timing judgment of excellent strength and airtightness of the product is determined. It relates to an easy dental prosthesis casting device and a casting method thereof.

Generally, dental prosthesis, such as crowns, bridges, artificial teeth, implant cases, etc., is widely used in dental care and pore fields, which are implanted in the alveolar bone in the oral cavity and across the side teeth of the missing tooth. It is used in various fields such as being artificially implanted by a denture or denture method.

The dental prosthesis is made of a material such as metal (for example, gold, nickel-chromium alloy, cobalt-chromium alloy), resin, and ceramic, and as a manufacturing method, precision casting method such as lost wax process is mainly used. The lost wax method is to bury a model made of wax in a buried material, to dry it, and then to heat and melt the wax to form a mold, which is an empty space, and to inject a molten material into the mold to form a cast body.

At this time, as the investment material, a gypsum investment material (Pypsum investment), a phosphate-based investment material (Phosphate bonded investment) and the like are known.

In the conventional method of casting a dental prosthesis, as shown in FIG. 1, a lead mold 1 is made of wax on a tooth or its vicinity, and an injection line 2 is attached to the lead mold 1. The injection line 2 is attached to the support 3, the lead mold 1 is mounted on the support 3, and the hollow cylindrical casting ring 4 is erected on the support.

The dental prosthesis may be cast by filling the casting ring 4 with a liquid buried material 5 and curing the molten metal. The dental prosthesis may be cast by melting and removing the lead mold 1 and the injection line 2 in a furnace. A mold 6 and an inlet 7 of molten metal are formed, and a molten melt is injected into the mold 6 through an inlet 7 by heating the molten material M on the upper surface of the casting ring 4. After curing, the dental prosthesis is cast, and when the investment material 5 is removed from the molded dental prosthesis, the dental prosthesis used in the dental medical field can be obtained.

In addition, centrifugal casting, pressure diecasting, mechanical casting, and the like may be used as the casting method.

In addition, casting of dental prosthesis should start casting immediately after the molten material is completely melted, but the casting effect is improved, but the casting timing is very narrow because the solidification speed of molten molten metal is very fast, and thus casting starts. If the casting timing is too fast or too late, there is a problem that an effective casting effect cannot be obtained.

Therefore, it is very important to cast with optimum casting timing. However, in the past, casting timing was judged by visually observing the presence or absence of shadow of molten material, shaking or flow state of molten material, and thus the judgment was inaccurate. The problem is that the molten metal is not filled in all the molds, the product structure is uneven or the pores or cracks are generated inside and outside the product, which adversely affects the strength and tightness of the product, causing serious defects in the quality of the molded dental prosthesis. There is.

The present invention has been made in order to solve all the above-described problems, when the molten material is all melted and completely flowed into the receiving portion can be determined as the optimum casting timing, it is easy to determine the casting timing It is an object of the present invention to provide a dental prosthesis casting apparatus and a casting method thereof, in which an optimum casting timing judgment capable of accurately casting a dental prosthesis free of casting defects is easy.

In addition, it is possible to manufacture a dental prosthesis having a perfect shape by minimizing the imperfection of the cast form due to the lack of casting pressure, incomplete melting of the molten material and incomplete filling into the mold of the molten metal by the judgment of the accurate casting timing. The cast body has a homogeneous structure, no pores do not occur inside and outside, there is no crack on the outside, excellent in strength, airtightness and durability of the product, there is also a purpose for the production of dental prosthesis without discoloration.

In order to solve the above problems, the present invention, the investment material is filled in the casting ring to form a hardened formwork, the lead mold made in the shape of the dental prosthesis is accommodated in the investment material, the molten material in the mold melted lead mold In the apparatus for casting a dental prosthesis by injecting molten molten metal, a seating portion for forming the molten material is formed on the inner side of the formwork, is formed to be recessed to fill the molten metal inside the seating portion, at least one on the bottom surface Provided is a dental prosthesis casting device that is easy to determine the optimum casting timing, characterized in that the receiving portion is formed with an injection hole.

In addition, the present invention forms a mold in which the casting ring is removed after the investment material is filled and cured inside the casting ring, the lead mold made in the shape of the dental prosthesis is accommodated in the investment material, the lead mold is melted in the molten removed mold In the apparatus for casting a dental prosthesis by injecting melted molten ash, a seating portion for forming the molten material is formed on the inner side of the formwork, the recess is formed to fill the molten metal inside the seating portion, one on the bottom surface Provided is a dental prosthesis casting apparatus that is easy to determine the optimum casting timing, characterized in that the receiving portion is formed with the above-described injection port.

At this time, the injection hole is characterized in that the diameter is in the range of 0.5 to 4.0 mm.

In addition, the formwork is also characterized in that an annular support ring for supporting the molten material protrudes upward.

Furthermore, there is a feature in that a cover for fixing the molten material to the outside of the casting ring is detachably coupled.

In addition, the present invention is filled with a buried material in the casting ring to form a hardened formwork, the lead mold made in the shape of the dental prosthesis is accommodated in the investment material, the molten material is injected into the mold in which the lead mold is melted and removed In the method of casting a dental prosthesis, the molten material is seated in the seating portion formed inside the mold, the mold on which the molten material is seated is put into a casting machine and heated, all the molten material is melted inside the seating portion The present invention provides a dental prosthesis casting method that is easy to determine the optimal casting timing, characterized in that casting is started by judging the timing of filling into the recessed receiving portion.

In addition, the present invention forms a mold in which the casting ring is removed after the investment material is filled and cured inside the casting ring, the lead mold made in the shape of the dental prosthesis is accommodated in the investment material, the lead mold is melted and removed in the mold A method of casting a dental prosthesis by injecting a molten melted molten material, wherein the molten material is seated in a seating portion formed inside the mold, and the mold on which the molten material is seated is placed in a casting machine and heated. The present invention provides a dental prosthesis casting method which is easy to determine the optimal casting timing, characterized in that the casting is started by judging the time point of melting into the receiving portion recessed inside the seating portion as the casting timing.

Here, the casting machine is also characterized by using a pressure casting machine.

In addition, the pressure casting machine is also characterized in that the dental prosthesis is cast by injecting the molten metal into the mold through the injection hole by pressing the pressure plate.

In addition, the pressure plate is also characterized in that the casting pressure is in the range of 0.05 to 0.6 MPa.

According to the present invention, when the molten material is all melted and completely flowed to flow into the receiving portion, the optimum casting timing can be judged, and the casting timing can be judged easily and accurately, thereby casting a dental prosthesis without casting defects. It can work.

In addition, it is possible to manufacture a dental prosthesis having a perfect shape by minimizing the imperfection of the cast form due to the lack of casting pressure, incomplete melting of the molten material and incomplete filling into the mold of the molten metal by the judgment of the accurate casting timing. The cast body has a homogeneous structure, no pores are generated inside and outside, there is no crack on the outside, excellent in strength, airtightness and durability of the product, there is an effect that can produce a dental prosthesis without discoloration.

1 (a) and 1 (b) are cross-sectional views showing a conventional dental prosthesis casting device.
2 (a) to 2 (c) is a perspective view showing a dental prosthesis casting device according to an embodiment of the present invention.
Figure 3 is a perspective view of a dental prosthesis casting apparatus according to an embodiment of the present invention having a cover.
Figures 4a to 4l is a view showing each step of the process of the dental prosthesis casting method according to an embodiment of the present invention.
Figure 5 (a) to Figure 5 (c) is a view showing a process for carrying out the summoning process by loading into the summoning furnace in the state of seating the molten material on the formwork.
6 (a) to 6 (d) is a photograph of a state in which the molten material is completely melted according to an embodiment of the present invention.
7 is a photograph of a dental prosthesis cast in accordance with an embodiment of the present invention.

The present inventors have conventionally determined the casting timing by visually observing the presence or absence of the shadow of the molten material, the shaking or flow state of the molten material, so that the determination is inaccurate and the molten metal is not filled in the mold at all, or the product structure is inhomogeneous, or the product is It has been recognized that pores or cracks occur inside and outside, which adversely affect the strength and airtightness of the product, causing serious casting defects in the quality of the cast dental prosthesis.

Accordingly, the present inventors have conducted research and efforts to solve all these problems, and as a result, all the molten material is melted and completely flowed into the receiving part, and can be judged as the optimum casting timing, and the casting timing can be determined. It is easy and accurate to judge the dental prosthesis without casting defects, and it is also possible to cast the dental prosthesis without casting defects. It is possible to produce a dental prosthesis having a perfect shape by minimizing the defect, as well as having a homogeneous structure of the cast body, no pores occurring inside and outside, and no cracks on the outside, thereby improving the strength, airtightness, and durability of the product. All of them are excellent, and it is easy to judge the optimal casting timing for producing dental prosthesis without discoloration. The present invention relates to a dental prosthesis casting apparatus and a casting method thereof.

Hereinafter, the structure of the present invention will be described in detail with reference to the drawings.

Dental prosthesis casting device is easy to determine the optimum casting timing according to the present invention by forming a mold 60 by filling the liquid investment material 50 inside the casting ring 40, the shape of the dental prosthesis The lead mold 10 is accommodated in the investment material 50, and the molten material F in which the molten material F is melted is injected into the mold 70 in which the lead mold 10 is melted out through a burn out process. It is a device for casting dental prosthesis.

As shown in Figure 2 (a) and 2 (b), the die 60 is a hollow casting ring by filling the liquid buried material 50 in the interior of the casting ring 40 made of a hollow cylindrical shape 40 may be included, and as shown in FIG. 2 (c), the formwork 60 has a liquid buried material 50 in the interior of the casting ring 40 having a hollow and cylindrical shape. ) May be formed in a state where the casting ring 40 is removed after the filling and curing.

In this case, the casting ring 40 may be a metal such as iron or stainless steel, rubber, silicon or the like.

In addition, the shape of the formwork 60 is not limited to a cylindrical shape may be made of a hollow structure having a variety of geometric shapes, such as polygonal or elliptical.

And, as shown in Figure 4b, the casting ring 40 has a form in which both upper and lower ends are open, to prevent the mold from being broken, the inner surface allows the side ring of the cured investment material 50 to cast the casting ring In order to compensate the casting shrinkage of 40, it is preferable that a cushioning material (not shown) is provided.

In addition, as shown in Figure 4a and 4b, the casting ring 40 is the inside of the lead mold 10 made of wax by looking at the model of the teeth or the vicinity therein is accommodated therein, the lead mold 10 An injection line 20 is attached to the injection line 20, and the injection line 20 is melted and removed in the summoning process to form an injection path 80, and the injection path 80 is a molten metal M filled in the receiving part 62. ) Is injected into the inlet (62a) and serves to guide to the mold (70).

Further, as shown in Figure 4a, the tip of the injection line 20 is inserted into the center of the support 30 to substantially support and fix the lead 10, the support 30 is a hardened investment material Determining the position of the lead 10 in the interior of 50, and when the support 30 is separated from the formwork 60 after the buried operation, the seating portion 61, the receiving portion on the upper surface of the formwork (60) The shape of the part 62 and the support ring 63 is made.

At this time, the support 30 is connected to detachable after the investment material 50 is cured, the surface in contact with the investment material may be made of a silicon material to facilitate separation, the support 30 is a formwork 60 On the upper surface of the seating portion 61, the receiving portion 62 and the support ring 63 is formed so as to have a shape corresponding to each of them.

Thus, when the investment material 50 is buried in the casting ring 40, the seating portion 61, the receiving portion 62 and the support on the upper surface of the formwork 60 according to the shape formed on the support 30 Ring 63 is formed.

In addition, the casting ring 40 is installed on the support 30 to support and fix the lead 10, the lead 10 supported and fixed on the support 30 is the die ( 60).

In addition, as shown in FIGS. 4C and 4D, the mold 60 is filled with a liquid buried material 50 from the opposite direction to which the lead 10 is injected so as to cover and embed the lead 10.

As shown in FIG. 4D, when the investment material 50 is cured, the formwork 60 has a seating portion 61 on which a molten material F is seated on an upper surface thereof, where the edge of the formwork 60 is formed. May be formed to protrude slightly upward to induce filling into the receiving portion 62 when the molten material F is melted.

In addition, the outer side of the seating portion 61 supports the molten material (F), and even when the molten material (F) is melted in an annular shape to induce filling into the recessed portion 62 without exiting to the outside The support ring 63 may be formed to protrude upward.

In addition, an accommodating part 62 is recessed in an inner side of the seating part 61 to fill and melt the molten material M in which the molten material F is melted. In this case, the accommodating part 62 has an upper side. Made of a wider conical shape, the melt (M) can be injected into the mold easily and quickly.

In addition, at least one injection hole 62a is formed on the bottom surface of the accommodation portion 62, and the molten metal M filled in the accommodation portion 62 is injected into the injection hole 62a to the mold 70. It is derived.

At this time, the inlet (62a) is preferably having a diameter of the range of 0.5 to 4.0 mm, which may not be rapid injection of the molten metal (M) when the diameter of the inlet (62a) is less than 0.5 mm, When the diameter of the injection hole 62a exceeds 4.0 mm, a part of the molten metal M may be introduced into the injection hole 62a and hardened before reaching the casting timing, thereby causing the cast body to have an incomplete shape or a tissue to be heterogeneous. Because there is.

However, in order to cast a cast body of higher quality, it may be more preferable that the diameter of the injection hole is in the range of 1.0 to 2.5 mm.

In addition, as shown in Figure 3, it is preferable that the cover 64 for fixing the molten material (F) on the outside of the casting ring 40 is coupled to be easily detachable, which is the molten material (F) Is to prevent the molten material (F) from shaking or falling down when the mold (60) is moved in a seated state, and the cover (64) is formed in a roughly "c" shape, and the bottom surface is a mold. The lower part of the 60 is wrapped, and the upper surface is wrapped around the upper part of the molten material F, and is separated from the mold 60 before the molten material F is melted in the press casting machine.

In addition, as shown in Figure 4e, through the summoning step of charging the formwork 60 in the summoning furnace (Furnace), and then heated to a heat of approximately 600 ℃ or more to melt remove the lead mold 10, as shown in Figure 4f It is possible to form a mold 70 which is an empty space for casting a dental prosthesis.

At this time, after performing the summoning process as shown in FIGS. 4d to 4f, the molten material F may be seated on the formwork 60 to perform casting, as illustrated in FIGS. 5 (a) to 5 (c). As described above, the summoning process may be performed by charging the sump into the summoning furnace while the molten material F is seated on the formwork 60.

Therefore, when the mold 60 is heated in the state in which the injection line 20 is faced downward, the lead mold 10 and the injection line 20 are melted to escape the outside of the form 60 and are removed. As a result, a mold 70 which is an empty space for casting the injection path 80 and the dental prosthesis is formed, and the molten material M in which the molten material F is melted is injected through the injection port 62a, thereby forming the injection path ( 80 is to be cast into the mold 70 to cast a dental prosthesis.

Dental prosthesis casting method is easy to determine the optimum casting timing according to the present invention, as shown in Figure 4a, first to make a lead 10 with a wax based on the model, and then directly attached to the injection line (Sprue), The injection line 2 fixes the lead mold 10 when the investment material 50 is buried, and also serves as a passage through which the molten wax is discharged when the sump is buried, and the molten material F is melted (M). This is injected to provide a passage for filling into the mold 70.

Then, the end of the injection line 20 opposite the lead 10 is inserted into the center of the support 30 to fix the separated lead 10 to the support 30.

The support 30 determines the position of the lead mold 10 in the investment material 50, and after the investment material 50 is cured, the support material 30 is separated again to allow the molten metal M to be accommodated. Crucible is made.

Then, as shown in Figure 4b, on the support 30, the hollow cylindrical casting ring 40 is built up and fixed. The casting ring 40 is used to prevent the mold 70 from being damaged, and a metal, rubber, or silicon material such as iron or stainless steel may be used.

Here, it is preferable that a cushioning material (not shown) is installed on the inner surface of the casting ring 40 to allow lateral expansion of the cured investment material 50 to compensate casting shrinkage of the casting ring 40.

And, as shown in Figure 4c, to form the mold 60 by filling the liquid buried material 50 in the interior of the casting ring 40 to cover the lead 10. However, the die 60 may be formed in a state in which the casting ring 40 is removed after the casting member 40 is filled with a liquid buried material 50 and cured.

Here, the investment material 50 is present in a state combined with the refractory material so as not to be damaged even at a high temperature, there are a gypsum investment investment (Pypsum investment), a phosphate investment investment (Phosphate bonded investment).

In addition, when the support member 30 is separated from the formwork 60 after the investment material 50 is cured, as shown in FIG. 4D, the upper surface of the formwork 60 is formed according to the shape formed on the support 30. The mounting portion 61, the receiving portion 62, the support ring 63 and the like are formed.

Thereafter, as shown in FIG. 4E, the mold 60 is placed in a summoning furnace and heated to melt and remove the lead mold 10 and the injection line 20 to perform a burnout.

At this time, the molten material (F) is seated on the formwork 60 in the summoning furnace to carry out the summoning process, or after performing the summoning process to seat the molten material (F) in the formwork (60) Casting may be carried out.

The summoning is a process of heating the lead mold 10 and the like to remove the lead mold 10 and inflating the mold 70. In order to obtain a dental prosthesis as a complete cast, the lead mold 10 must be completely removed.

The summoning is carried out in the summoning passage, and first heats the formwork 60 with the injection line 20 facing down to allow most of the wax to flow into the liquid state, and then the oxygen inside the summoning passage is easily The mold 60 is turned upside down so that the injection line 20 is heated upward to vaporize the wax.

As shown in FIG. 4F, the mold 60 is taken out of the summoning path, and the mold 60 in which the molten material F is seated is placed in a casting machine and heated to melt the molten material F. FIG. The molten material (F) may be a noble metal alloy, nickel-chromium alloy, cobalt-chromium alloy and the like.

In addition, the casting machine includes a centrifugal casting machine for pushing the molten melted molten material into the mold of the cavity by using the centrifugal force, and a pressure casting machine for pushing the molten melted molten material into the mold of the cavity by using the pressing force.

Here, as shown in Figure 4g, for example, when casting with a pressure casting machine, the die 60 in which the molten material (F) is seated in a pressure casting machine and the molten material (F) is a gas-air torch ( It is preferable to heat-melt using a gas-air blow torch or the like, and to heat the molten material (F) to a high temperature so that it can be completely melted as soon as possible.

At this time, depending on the type of the molten material (F), when the molten material (F) starts to melt, a small amount of solvent (Flux) is sprayed to cover the surface of the molten molten metal to prevent oxidation or to prevent gas intrusion to the casting body It is also possible to prevent the generation of pores inside and outside.

Then, as shown in Figure 4h, the molten molten material (F) is filled into the space of the receiving portion 62 recessed inside the seating portion 61 to form a molten metal (M), the melting When the ash F is completely melted and flows out of the seating portion 61 into the receiving portion 62 to be filled, casting timing is the casting timing, and when such casting timing is reached, FIGS. 4I and FIG. As shown in FIG. 4j, the molten metal M is pushed into the mold 70 by immediately pressing the pressure plate installed in the pressure casting machine without delay.

That is, the molten metal (M) is pressurized into the inlet (62a) is filled in the mold 70 through the injection path 80 in a short time is to be a dental prosthesis is cast.

Here, the casting timing refers to a time point in which the molten material (F) is completely melted and sufficient fluidity is generated to cast as shown in FIGS. 6 (a) to 6 (d), and the casting of the dental prosthesis is a molten material. Casting effect improves when casting starts immediately after (F) is completely melted, but the solidification speed of molten molten metal M is very fast, so that the casting timing tolerance is very narrow, and casting timing is too fast. If it is late or late, no effective casting effect is obtained.

Therefore, in the present invention, forming the seating portion 61 in which the molten material (F) is seated inside the formwork 60, and the housing (62) is formed to be recessed inside the seating portion 61 ( 60, when the molten material (F) is all melted to form a molten metal (M) having fluidity, the molten material (F) seated on the seating portion 61 is melted and flows to the receiving portion 62 This can be easily seen by the naked eye, and this is the casting timing.

Therefore, the optimum casting timing can be easily and accurately judged and cast, thereby not only casting a dental prosthesis free of casting defects in the product, but also having a homogenized structure, no pores or cracks, A dental prosthesis with excellent durability can be obtained.

Furthermore, the casting pressure of the pressure plate of the pressure casting machine is preferably in the range of 0.05 to 0.6 MPa. If the casting pressure is less than 0.05 MPa, casting defects such as the molten metal may not completely fill the mold or the surface of the casting may not be smooth. This is because there is a problem that, if the casting pressure exceeds 0.6 MPa there is a problem that can destroy the casting wall.

And, as shown in Figure 4k, after the casting is completed, the mold 60 is removed from the pressure casting machine and cooled, the cured investment material 50 is removed, and the molded dental prosthesis is separated.

Then, as shown in Figure 4l, by using a sand blaster (Sand blaster) to remove the unnecessary residues remaining in the dental prosthesis at high pressure to complete the final product as shown in FIG.

If the surface of the dental prosthesis is turned black due to the oxide, pickling is carried out by putting it in an acid solution to remove the oxide from the surface.

And, the finished dental prosthesis is visually judged as casting defects, and if casting defects appear, it is corrected by soldering or polishing, or newly manufactured, but in the case of no casting defects, it is in the patient's mouth. Will be installed.

In this case, the casting defect refers to deformation of the cast body, surface roughness of the outer surface of the cast body, bubbles generated in the cast body, incomplete form of the cast body, and solidification shrinkage of the cast body.

As a result, according to the dental prosthesis casting apparatus and the casting method of which the optimum casting timing can be easily judged according to the present invention, it is judged as the optimal casting timing when all the molten material is melted and completely flowed into the receiving part and filled. The casting timing can be easily and precisely judged, so that the dental prosthesis without casting defect can be cast.In addition, due to the lack of casting pressure, incomplete melting of the molten material, and incomplete filling into the mold of the molten metal, the casting timing can be judged accurately. It is possible to produce a dental prosthesis having a perfect shape by minimizing the imperfections of the cast form, as well as having a homogeneous structure of the cast, no pores inside and outside, no cracks on the outside, It is excellent in strength, airtightness and durability, and can produce a dental prosthesis without discoloration.

As described above, the present invention has been described in detail by using a preferred embodiment, but the scope of the present invention is not limited to the specific embodiment, it should be interpreted by the appended claims. In addition, those of ordinary skill in the art that various modifications and applications are possible without departing from the scope and spirit of the present invention.

* Conventional technology
1. Lead type 2. Injection line
3. Support 4. Casting Ring
5. investment material 6. mold
7. Inlet
* Present invention
10. Lead type 20. Injection line
30. Support 40. Casting Ring
50. Investment material 60. Formwork
61. Seating part 62. Receiving part
62a. Inlet 63. Jiwonhwan
64.Cover 70.Mould
80. F. Melt Furnace
M. Yung Tang

Claims (10)

The investment material is filled into the casting ring to form a hardened formwork, and a lead mold made in the shape of a dental prosthesis is accommodated in the investment material, and a molten material is injected into the mold from which the lead mold is melted and removed, thereby casting a dental prosthesis. In the device,
A seating portion in which the molten material is seated is formed inside the formwork,
It is formed to be recessed so that the molten metal is filled in the seating portion, the receiving portion is formed with at least one injection hole is formed on the bottom surface,
The mold is a dental prosthesis casting apparatus that is easy to determine the optimum casting timing, characterized in that the support ring of the annular for supporting the molten material protruding upwardly formed on the upper surface.
After the investment material is filled into the casting ring and cured to form a mold in which the casting ring is removed, a mold made in the shape of a dental prosthesis is accommodated in the investment material, and a molten material is melted in the mold in which the lead mold is melted and removed. An apparatus for injecting and casting a dental prosthesis,
A seating portion in which the molten material is seated is formed inside the formwork,
It is formed to be recessed so that the molten metal is filled in the seating portion, the receiving portion is formed with at least one injection hole is formed on the bottom surface,
The mold is a dental prosthesis casting apparatus that is easy to determine the optimum casting timing, characterized in that the support ring of the annular for supporting the molten material protruding upwardly formed on the upper surface.
3. The method according to claim 1 or 2,
The injection hole is a dental prosthesis casting apparatus easy to determine the optimum casting timing, characterized in that the diameter ranges from 0.5 to 4.0 mm.
delete 3. The method according to claim 1 or 2,
Dental prosthesis casting apparatus is easy to determine the optimal casting timing, characterized in that the cover for fixing the molten material on the outside of the casting ring detachably coupled.
The investment material is filled into the casting ring to form a hardened formwork, and a lead mold made in the shape of a dental prosthesis is accommodated in the investment material, and a molten material is injected into the mold from which the lead mold is melted and removed, thereby casting a dental prosthesis. In the way,
The molten material is seated on the seating portion formed inside the formwork,
Optimal casting timing, characterized in that the casting timing is determined by casting the mold in which the molten material is seated in the casting machine and heated, and judges the timing at which all of the molten material is melted and filled into the receiving part recessed inside the seating part as the casting timing. Easy to judge dental prosthesis casting method.
After the investment material is filled into the casting ring and cured to form a mold in which the casting ring is removed, a mold made in the shape of a dental prosthesis is accommodated in the investment material, and a molten material is melted in the mold in which the lead mold is melted and removed. In the method of injection and casting a dental prosthesis,
The molten material is seated on the seating portion formed inside the formwork,
Optimal casting timing, characterized in that the casting timing is determined by casting the mold in which the molten material is seated in the casting machine and heated, and judges the timing at which all of the molten material is melted and filled into the receiving part recessed inside the seating part as the casting timing. Easy to judge dental prosthesis casting method.
8. The method according to claim 6 or 7,
The casting machine is a method of casting the dental prosthesis easy to determine the optimum casting timing, characterized in that using a pressure casting machine.
The method of claim 8,
The press casting machine is pressurized by a pressure plate to inject the molten metal into the mold through the injection hole for the optimal casting timing, it is easy to determine the optimal casting timing.
The method of claim 9,
The pressure plate is a casting pressure is 0.05 to 0.6 MPa range, characterized in that the optimal casting timing casting easy to determine the dental prosthesis.

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