KR101961292B1 - Manufacturing Method of Titanium-based Dental Alloy Block for 3D Machining using CAD / CAM - Google Patents

Abstract

The present invention relates to a method for manufacturing a titanium-based dental alloy block for 3D cutting using CAD/CAM, in which the titanium-based dental alloy block is cut through a 3D cutting apparatus using CAD/CAM to be formed as a dental prosthesis. According to the present invention, the method comprises: a mixing process of mixing a raw material including titanium as a main raw material; a melting process of inserting the mixed raw material into a melting furnace to melt the raw material; a casting block forming process of injecting the molten raw material into a casting mold to cast a titanium-based casting block; a cold forging process of arranging the casted titanium-based casting block in a forging mold, and repeatedly pressing the titanium-based casting block with a forging press punch to correct the shape of the titanium-based casting block arranged in the forging mold and uniformize the density of a structure; and a pickup process of ejecting the cold forged casting block from the forging mold. The present invention can secure quality stability and uniformity.

Description

Technical Field [0001] The present invention relates to a method of manufacturing a titanium-based dental alloy block for a three-dimensional cutting process using a CAD / CAM,

The present invention relates to a method of manufacturing a titanium-based dental alloy block for three-dimensional cutting using a CAD / CAM, and more particularly, to a method of manufacturing a titanium- / CAM. BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a titanium-

As is well known, an implant in a dental field refers to a metal structure that functions as an artificial root by adhering to the alveolar bone by being placed in the alveolar bone of the site where the tooth is partially or totally lost in the oral cavity.

Unlike conventional prostheses or dentures, the implants do not injure the surrounding dental tissue and have a function and shape similar to natural teeth but have a relatively long life span.

Moreover, the implants do not need to shave adjacent teeth, prevent the alveolar bone from being absorbed, and can make functional and aesthetically superior prostheses, and have advantages such as when talking, laughing, or missing a denture at meal time.

Typical implants consist of a fixture, a abutment and a crown that forms the appearance of an artificial tooth. The fixture is inserted and fixed in the alveolar bone covered with the gum skin, The abutment is coupled to an upper portion of the fixture to expose the upper portion of the gum.

Titanium having the appropriate mechanical strength, biocompatibility, excellent corrosion resistance and excellent osseointegration ability is most widely used as the material of such a fixing body.

Meanwhile, recently, the dental prosthesis is not fabricated by hand-machining, and the shape of the dental prosthesis is designed by three-dimensionally scanning the mouth through the 3D mouth scanner device. Then, according to the design value, the dental alloy block is subjected to CAD / CAM The shape of a dental prosthesis to be used is shaped by cutting through a three-dimensional cutting apparatus using a cutting tool.

Therefore, the quality of the dental alloy block is an important factor that affects the quality of the dental prosthesis formed by three-dimensional cutting.

Conventionally, a raw material is melted, a molten raw material is put into a casting mold to mold a casting block according to the shape of the casting mold, and the surface of the casting block is polished to manufacture a dental alloy block have.

However, since the dental alloy block having the casting block polished can generate pores in the casting process and the density of the structure is not uniform, the dental restorative block is subjected to three- It is difficult to guarantee uniformity of quality.

KR 10-2013-0110677 A KR 10-1133677 B1 KR 10-0534243 B1

It is an object of the present invention, which is devised to solve the above-mentioned problems, to provide a titanium-based cast block which is uniquely post-treated by casting- The present invention also provides a method of manufacturing a titanium-based dental alloy block for three-dimensional cutting using a CAD / CAM to ensure the stability of dental prosthesis quality.

The above object is achieved by the following constitutions provided in the present invention.

A method of manufacturing a titanium-based dental alloy block for three-dimensional cutting using a CAD / CAM according to the present invention comprises:

A mixing step of blending a raw material containing titanium as a main raw material;

A dissolving step of injecting the raw material thus compounded into a melting furnace to dissolve the raw material;

A casting block forming step of casting the titanium-based cast block by injecting the molten raw material into a casting mold;

The titanium casting block is placed in a forging mold, and then the titanium casting block is repeatedly compressed through a forging press punch to calibrate the shape of the casting block disposed in the forging mold and to equalize the density of the tissue A cold forging process; And

And a taking-out step of taking out the cold-forged cast block in a forging mold,
In the casting block molding step,
A plurality of shaped cores are disposed in the casting mold so that a plurality of dispersion pressing holes vertically passing through the molding core are formed on the titanium casting block at regular intervals,
In the cold forging process,
Using a forged press punch formed in such a manner that the divided pressing cores are projected outwardly from the pressing face,
The titanium-based cast block disposed in the forging die is pressed down by the pressing face of the forged press punch in the downward direction,
The divided compressed cores are introduced into the respective dispersion pressure sockets formed in the titanium-based cast block to support the inner sidewall of the dispersion squeeze hole,
The titanium-based cast block is squeezed in the forging mold, including downward squeezing and lateral squeezing,
Wherein a central aligning groove is formed on the bottom surface of the forging die so as to be aligned with the center of the dispersed squeeze hole formed in the titanium die casting block, The supported steel ball is disposed so as to protrude downward,
Wherein each of the downwardly divided crushing cores that are lowered by the forged press punches enters the central alignment groove through a steel ball disposed at the lower portion and descends while being centered on the center of the dispersion pressure bonding hole, And the side wall is squeezed in the lateral direction.

Preferably, the raw material constituting the titanium-based cast block is a mixture of 16 to 20 atomic% of niobium and the balance of titanium and titanium containing other impurities.

More preferably, the titanium-based cast block taken out by the takeout step is subjected to heat treatment at a temperature of 1100 to 1200 占 폚 for 60 to 90 minutes and then slowly cooled to obtain a titanium-based alloy block for dental A heat treatment process is formed.

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As described above, in the present invention, the cast titanium-based cast block is uniquely post-treated so as to have a uniform density while eliminating the occurrence of pores in the structure.

That is, in the present invention, it is possible to provide a titanium-based alloy block for dental materials having homogeneous physical properties by cold-forging the cast titanium-based cast block to remove pores existing in the titanium cast block and to uniformize the density of the structure Do.

Particularly, in the present embodiment, in the cold forging of the cast-formed titanium-based cast block, by forming a split compression structure for laterally dividing and pressing the titanium-based cast block, the structure of the titanium- And the resultant three-dimensional three-dimensional split pressing causes the structure of the titanium-based cast block to be uniformly pressed so that the uniformity of the structure of the titanium- .

Thus, the dental prosthesis formed by three-dimensionally cutting the dental prosthesis can have uniform physical properties without occurrence of porosity or deviation due to tissue density, thereby ensuring quality stability and uniformity.

FIG. 1 is a flowchart showing a process of manufacturing a dental prosthesis using a titanium-based alloy block for dental molding formed by a method of manufacturing a titanium-based dental alloy block for three-dimensional cutting using a CAD / CAM according to the present invention,
FIG. 2 shows a sequential flow state of a method of manufacturing a titanium-based dental alloy block for three-dimensional cutting using a CAD / CAM according to the present invention,
FIGS. 3 to 6 are schematic views illustrating a manufacturing process of a titanium-based alloy block for dental use according to a method for producing a titanium-based alloy block for dental use, which is a preferred embodiment of the present invention.

Hereinafter, a method of manufacturing a titanium-based dental alloy block for three-dimensional cutting using a CAD / CAM, which is a preferred embodiment of the present invention, will be described in detail with reference to the accompanying drawings.

FIG. 1 is a flowchart showing a manufacturing process of a dental prosthesis using a titanium-based alloy block for dental molding formed by a method of manufacturing a titanium-based dental alloy block for three-dimensional cutting using a CAD / CAM according to the present invention. FIGS. 3 to 6 are views showing a sequential flow state of a method of manufacturing a titanium-based dental alloy block for three-dimensional cutting using a CAD / CAM according to the present invention. Based alloy block according to a manufacturing method of a block according to the present invention.

A method for manufacturing a titanium alloy block for dental use according to the present invention is a method for manufacturing a titanium alloy block for dental use, which comprises three-dimensionally cutting a multi-axial three-dimensional cutting device according to a design value of a dental prosthesis measured and collected through a 3D mouth scanner or the like, To thereby produce a titanium-based alloy block for dental use.

The dental titanium-based alloy block (DM) is a kind of processing specimen which is made of titanium as a main raw material, which has high nasal strength, excellent biocompatibility and corrosion resistance and is not oxidized even when contacted with air or body fluids.

In the present invention, for example, a titanium alloy block for dental use is formed through a raw material mixed with 16 to 20 atomic% of niobium and the balance of titanium and titanium containing other impurities.

Niobium (Nb) mixed with oxygen is mixed with oxygen and impurities such as nitrogen, carbon and hydrogen. The niobium (Nb) compounded with titanium is an element that improves the workability of the titanium alloy. When niobium (Nb) The formation of the alpha phase is suppressed and the formation of the beta phase is promoted to play a critical role in stabilizing the structure of the alloy block.

In this embodiment, a unique post-treatment process is added to produce a titanium-based alloy block for dental use through a raw material containing titanium as its main raw material, and the titanium alloy block for dental molding formed through the titanium- And a plurality of titanium-based alloy blocks are formed in a single step by a single molding process, thereby improving the productivity.

Thus, if the dental titanium alloy block for dental use has the dimensional accuracy and the uniform density of the tissue by the post-treatment step provided in the present invention, the dental prosthesis molded through the dental titanium alloy block can be precisely cut according to the three- The accuracy is ensured and the uniformity of the strength is ensured, so that the defect occurrence rate is reduced, and the uniformity and stability of the quality can be ensured.

That is, in the present invention, the titanium-based alloy block for dental molding formed into various dental prosthesis through three-dimensional cutting through CAD / CAM has a dimensional accuracy and uniform density without remaining pores in the tissue, Quality stability of dental prostheses is ensured.

Hereinafter, a method for manufacturing a titanium-based alloy block for dental use using such a raw material will be described in detail with reference to FIG. 1 to FIG.

As shown in FIG. 2, the method for producing a titanium-based alloy block for dental use according to the present invention comprises a mixing step (S 10) of blending a raw material containing titanium as a main raw material; A dissolving step (S 20) of injecting and dissolving the compounded raw material into a melting furnace; And a cast block forming process (S30) for casting the titanium-based cast block (CM) by injecting the molten raw material into the casting mold (100).

In this embodiment, the raw material containing titanium as its main raw material is put into the high-frequency melting furnace and dissolved. Then, as shown in FIG. 3, the melt containing the raw material is injected into the casting mold 100, Thereby molding the cast block CM.

However, since the titanium-based cast block (CM) is simply formed by injecting raw materials dissolved in a flask, the titanium-based cast block is difficult to ensure uniformity of the structure and a plurality of pores are inevitably present in the structure.

In this embodiment, the titanium-based cast block (CM) cast in this manner is post-processed to be formed into a titanium-based alloy block DM for dental use having a dimensional accuracy and a uniform density of the structure without residual pores in the structure.

To this end, in this embodiment, the cast titanium mold cast block CM is placed in the forging mold 210, and then the cast block CM is repeatedly compressed through the forged press punch 220, A cold forging step (S 40) of forming a titanium-based dental alloy block (DM) whose shape is corrected by the dicing machine and whose density is uniformized; (S50) for extracting the titanium-based dental alloy block (DM) after completion of the cold forging step (S40) in the forging mold (210).

As shown in FIGS. 4 and 5, the forging press apparatus for performing the cold forging process (S 40) includes an upper open forging mold frame 210 housing the cast titanium formed cast block CM, And a forged press punch 220 which is disposed on the upper part of the forging mold 210 and repeatedly presses the titanium-based cast block CM disposed in the forging mold 210.

Accordingly, the titanium-based cast block CM disposed in the forging mold 210 is repeatedly pressed by the forged press punch 220, and the titanium-based cast block CM disposed in the forged casting mold 210 As the shape is corrected, the pores remaining in the interior are removed, and the uniform density of the tissue is obtained.

In addition, in the present embodiment, the titanium-based cast block CM is configured so that it is compressed not only in the downward direction but also in the lateral direction by the forged press punch 220 so that the titanium- And is sterically compressed by the compressive force provided from the press punch 220 so that the density of the tissue is uniformly formed.

For this purpose, in the present embodiment, in the casting of the titanium-based cast block CM through the cast block forming step S30, as shown in FIG. 3, the titanium- So that the balls H are formed at regular intervals.

That is, as shown in FIG. 3, a plurality of molded cores 110 are disposed in the casting mold 100, and the titanium-based cast block CM molded and cast in the casting mold 100 has a molded core A plurality of dispersion pressing holes H passing through the upper and lower portions are formed at regular intervals.

In the cold forging step (S 40), the compression bonding punch (220) is provided with a compression bonding punch (220) on which divided compression bonding holes (H) formed in the titanium casting block (221) are formed so as to protrude downward.

At this time, each of the distributed pressure bonding holes H and the divided pressing core 221 entering correspondingly to the respective distributed pressure bonding holes have a wedge-like shape gradually becoming narrower from the upper part to the lower part, The divided compression core 221 that enters the dispersion pressurized hole H supports the inner wall of the dispersion pressurized hole H in an oblique structure.

In this embodiment, the sidewall of the dispersed squeeze hole H and the outer sidewall of the divided squeeze core 221 form an inclination angle of 2 to 3 degrees.

Accordingly, the titanium-based cast block CM disposed in the forging mold 210 is flat-pressed downward by the pressing face of the lowering forged press punch 220, and at the same time, the pressing of the forged press punch 220 The divided compression bonding cores 221 protruding downward from the surface of the metal mold CM enter the dispersion pressing holes H formed in the titanium casting block CM and squeeze the inner walls of the dispersion pressing holes H laterally.

Thus, the titanium-based cast block CM disposed in the forging mold frame 210 is flatly pressed in the downward direction by the pressing face of the forged press punch 220, and at the same time, And is laterally compressed by the split pressing core 221.

That is, the titanium-based cast block CM disposed in the forging mold frame 210 is squeezed in three dimensions including a downward squeezing and a lateral squeezing, whereby the shape is corrected, and the uniform density The bubbles remaining in the interior are removed.

Thereafter, the titanium-based dental alloy block DM formed through the cold forging step (S 40) is taken out from the forging mold 210 through the take-out step (S 50) To form a titanium-based dental alloy block DM 'cut into a unit size.

In this embodiment, as shown in FIG. 5B, on the bottom surface of the forging die 210, there are formed center aligning grooves 211 (see FIG. 5A) aligned with the centers of the dispersion pressing holes H formed in the titanium- And a steel ball 222 supported downward by a spring 223 is disposed on the bottom surface of the divided pressing core 221 formed on the forging press punch so as to protrude downward.

In this case, each of the lower divided compression bonding cores 221 enters the center alignment groove 211 through the steel ball 222 disposed at the lower portion thereof, And the inner wall of the dispersion pressing hole H is squeezed in the lateral direction.

Thus, the phenomenon that the split pressing core 221 is collided with the titanium casting block CM and is physically damaged while descending to an abnormal trajectory can be prevented.

Thereafter, the dental titanium-based alloy blocks DM 'cut into a unit size through the split cutting process (S 60) are subjected to a heat treatment process (S 70 ) And then slowly cooled to perform the polishing process (S 80) in which stabilization of the structure is achieved by the heat treatment process.

The thus prepared dental titanium alloy block DM 'is inserted into a three-dimensional machining apparatus using a CAD / CAM to scan the mouth through a 3D mouth scanner device, thereby obtaining a design value of a dental prosthesis (Three-dimensional cutting process; S 200), and is formed into a dental prosthesis (S 300).

If the titanium-based alloy block for dental use is constructed so as to have the dimensional accuracy and the uniform density of the tissue, the dental prosthesis molded through it can be precisely cut according to the three-dimensional cutting, thereby ensuring dimensional accuracy and having uniform strength The defect occurrence rate is reduced, and uniformity and stability of quality can be secured.

While the present invention has been particularly shown and described with reference to certain exemplary embodiments thereof, it should be understood that the same is by way of illustration and example only and is not to be taken by way of limitation.

It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. .

Accordingly, all equivalents of the claims and their equivalents, as well as the embodiments described hereinabove and the appended claims, are also within the scope of the inventive concept.

100. Casting mold 110. Molding core
210. Forging mold 211. Center alignment groove
220. FORGED PRESS PUNCH 221. Split-Pressed Core
222. Steel ball 223. Spring
CM. Casting block
H. Dispersed squeeze balls DM, DM '. Titanium-based dental alloy block

Claims (3)

A mixing step of blending a raw material containing titanium as a main raw material;
A dissolving step of injecting the raw material thus compounded into a melting furnace to dissolve the raw material;
A casting block forming step of casting the titanium-based cast block by injecting the molten raw material into a casting mold;
The titanium casting block is placed in a forging mold, and then the titanium casting block is repeatedly compressed through a forging press punch to calibrate the shape of the casting block disposed in the forging mold and to equalize the density of the tissue A cold forging process; And
And a taking-out step of taking out the cold-forged cast block in a forging mold,
In the casting block molding step,
A plurality of shaped cores are disposed in the casting mold so that a plurality of dispersion pressing holes vertically passing through the molding core are formed on the titanium casting block at regular intervals,
In the cold forging process,
By using a forged press punch in which the divided pressing cores are formed so as to protrude radially on the pressing face,
The titanium-based cast block disposed in the forging die is pressed down by the pressing face of the forged press punch in the downward direction,
The divided compressed cores are introduced into the respective dispersion pressure sockets formed in the titanium-based cast block to support the inner sidewall of the dispersion squeeze hole,
The titanium-based cast block is squeezed in the forging mold, including downward squeezing and lateral squeezing,
Wherein a central aligning groove is formed on the bottom surface of the forging die so as to be aligned with the center of the dispersed squeeze hole formed in the titanium die casting block, The supported steel ball is disposed so as to protrude downward,
Wherein each of the downwardly divided crushing cores that are lowered by the forged press punches enters the central alignment groove through a steel ball disposed at the lower portion and descends while being centered on the center of the dispersion pressure bonding hole, Wherein the side wall is squeezed in a lateral direction. The method of manufacturing a titanium-based dental alloy block for three-dimensional cutting using a CAD / CAM. The method according to claim 1, wherein the titanium-based cast block is formed of a raw material containing 16 to 20 atomic percent of niobium and the balance of titanium and titanium containing other impurities. Method of manufacturing titanium-based dental alloy block for cutting process. The titanium based casting block according to claim 1, wherein the titanium-based cast block taken out by the takeout step is heat-treated at a temperature of 1100 to 1200 캜 for 60 to 90 minutes and then slowly cooled to obtain a titanium- Of the titanium-based dental alloy block for three-dimensional cutting using the CAD / CAM.

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