JPH05111789A - Tack adhesive agent-containing brazer - Google Patents

Abstract

PURPOSE:To complete brazing with simple operations and improve the economics, quality and stability by combining a flux, wax for tack adhesion or a high- polymer adhesive with a metallic brazing filler metal. CONSTITUTION:The wax for tack adhesion or the high-polymer adhesive as well as the brazing filler metal and the flux can be simultaneously set at the time of tack adhesion and the need for heating up in order to fluidize the tack adhesive of the ensuing stages is eliminated in a series of operating stages for a tack adhering operation, removing the tack adhesive by heating up, applying a flux, heating up, setting the metallic brazer, and again heating up. The brazing is thus completed by the simple operations.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to joining metal materials, ceramics and the like, and more particularly to a joining material for brazing dental materials and brazing or soldering various parts such as electric contacts and electronic parts. ..

[0002]

2. Description of the Related Art The method of joining metals is roughly classified into welding for melting and joining metals, diffusion welding or pressure welding by heating, and melting and joining of other metal materials. Brazing and soldering are generally used.

Among these, the joining called brazing or soldering is performed by using both materials to be joined and a metal brazing material or solder having a slightly lower melting point, melting the brazing material or solder, It is a material that joins the materials of 600 and is practically 600
A brazing material with a temperature above ℃ or solder that melts at 150 to 300 ℃ is used. And these brazing operations or soldering are performed in vacuum, in a gas atmosphere, or in the atmosphere. However, in brazing or soldering in the atmosphere, a flux is generally used because the material or the braze itself is oxidized. Used to prevent oxidation and braze.

In this way, the brazing or soldering work in the atmosphere is easy to handle, and there is no need for capital investment such as a vacuum furnace with large equipment and a conveyor type atmosphere furnace. It has been used by many companies and individuals since ancient times because it can achieve its purpose even with a soldering iron, an atmospheric electric furnace, etc.

For example, in the case of dental brazing, an example will be taken in which a part of a patient's missing tooth is repaired (a denture is inserted) with metal.

In order to fix the metal used as a restoration (denture) in the mouth, it is necessary to cover the teeth on both sides with metal and to connect the metal and the metal block for repairing the missing part. .. Therefore, after cutting the outer sides of the teeth on both sides of the missing tooth, the whole mold is taken in the mouth including the missing part, and a model is made from the mold. Wax is raised on the scraped tooth part on the model to restore the original tooth morphology, and a mold is made with wax including the missing part by occlusion suitable for the patient. Then, the wax mold is removed from the model, and a metal denture is manufactured by the lost wax method.

The metal denture is sometimes cast as a single block, but in many cases it is cast in two or three blocks, and then each block is positioned on the model or in the mouth of the patient. Then, brazing is performed. As a method, fit a cast metal block to each tooth carved in the patient's mouth, check the bite, and then temporarily wear each metal block including the missing part. Or, use a polymer adhesive for temporary attachment. Next, the temporarily attached metal blocks are taken out from the model or mouth as a lump, and the brazing part is exposed and buried in a refractory material for brazing. After the refractory material is hardened, the whole wax is melted and the temporary adhesive wax or polymer adhesive is removed by heating. Next, apply flux to the brazing part and heat it further.When the brazing part is covered with the melted flux and the temperature rises to near the melting temperature of the brazing part, a thin plate or wire type brazing material is placed on the brazing part. ,
Heat it further and let it flow.

[0008] At present, since such work is performed in order to manufacture a metal denture, a difference in the level of technology caused by the skill of each individual in the manufacture appears as success or failure of brazing, and man-hours required for the work. There was a problem such as being expensive.

[0009]

SUMMARY OF THE INVENTION In the above-described process of making dental restorations (dentures) performed in dentistry, it is necessary to position each restoration so that it is brazed at a correct position. Temporary fitting is performed on the model or in the patient's mouth using temporary wearing wax or polymeric adhesive, removed from the model or mouth to prevent deformation and secured with brazing refractory. Then, after melting and removing the temporary tacking material, apply flux between the restorations to be joined and heat it, and after the brazing part is covered with the molten flux, a thin plate or wire An appropriate amount of wax is placed, the wax is melted, and brazing is performed.

In such an operation, each metal block must be fitted and fixed in the mouth of the patient with a certain gap. Generally, the brazing strength is such that the gap between the metals to be joined is 50-80.
The range of μm is preferable, and it is said that the strength is stable.

Further, as described above, temporary work with the temporary wax or polymer adhesive, removal of the temporary wax or polymer adhesive by temperature increase, flux application, temperature increase, metal brazing, and again It was necessary to complete a series of work steps of raising the temperature and performing melting brazing in a single step and obtaining the same result no matter who performed it.

[0012]

In view of the above-mentioned problems, the inventors of the present invention have conducted intensive studies on measures for simultaneously carrying out the work of temporarily attaching and brazing metal blocks in order to solve the above problems. The temporary wax or polymer adhesive used for temporary adhesion is combined with the metallic brazing material and flux used for brazing, and the required amount of metallic brazing and flux is set at the brazing point during temporary adhesion. Wearing is complete,
When it is fixed to the investment material (refractory material), the brazing preparation work is completed, then the temperature rises, brazing can be done when it reaches a certain temperature, and the brazing is completed if cooled and taken out. (EN) A wax containing a temporary adhesive, which is a composite of a wax for temporary wearing or a polymer adhesive, a flux, and a metal brazing material, which enables a manufacturing process with extremely good workability.

[0013]

According to the present invention, as described above, a metal block made to repair a lost tooth portion of a patient is placed on a model or in the mouth, and a temporary wearing wax or polymer is used. Adhesive is used, but by using a temporary adhesive containing braze, the amount of metal braze required for brazing can be freely adjusted for the part that requires brazing. can do.

In addition, since the required amounts of the metal brazing material and the flux can be placed at the same time at the time of temporary fixing, which is performed at the beginning, immediately after fixing with the refractory material, heating is performed by an electric furnace or a burner for brazing. You can braze it. At that time, the wax or polymer adhesive used for temporary attachment melts when heated, and the flux component remains in the refractory material, leaving the flux component infiltrated, so it is necessary to remove the temporary attachment wax or polymer adhesive. It can be omitted. Furthermore, by performing the work that was normally done by using a burner at the time of brazing in an electric furnace, the atmosphere such as depressurized state or inert gas (argon gas) can be freely selected, and the temperature can be controlled accurately. Can be done.

From the above, the work of raising the temperature for removing the temporary wearing wax or the polymer adhesive, the application of the flux, and the work of placing the required amount of the metal braze on the brazing portion later are all unnecessary. Moreover, since the work is simple, systematization is easy, and brazing work can be performed under the same conditions without requiring a skilled worker having a certain level or higher to perform the work as in the past.

The composition of the wax containing a temporary adhesive according to the present invention is a composite of a temporary wax or a polymer adhesive, a flux and a metal brazing material, and the appropriate ratio thereof is:
Although it depends on the material, shape and quality to be brazed, if the weight ratio of the flux to the metal braze is 10% or more, the flux plays a role of preventing oxidation.

The weight ratio of the wax for temporary wear or the polymer adhesive is 10 with respect to the amount containing the metal brazing material and the flux.
% Or more is sufficient for temporary clothing.

The proportion of the metal brazing material varies depending on the size of the particles, but it is better to adjust the amount of the metal brazing material during brazing as long as the fluidity is not lost. In order to bring out the total goodness that combines the effects of molecular adhesive and flux, the weight ratio of metal brazing is 30% ~
90% is good. Brazing work is possible even if it is more or less than this, and is not limited to this. The metal brazing material is a thin plate, a strip, a wire and fine particles or flakes produced by an atomizing method or a pulverizing method, or a thin plate,
Fine wires and the like, chemically produced powders, flakes and the like may be used.

The flux used may be a dry powder, or a flux which has been once melted at a high temperature to be vitrified and then re-granulated. When vitrified particles are used, they do not gasify at a high temperature and do not contain a component that generates a residue during combustion, so that the brazing metal material does not spread to the surroundings during brazing and good brazing can be performed.

Needless to say, the temporary wearing wax or the polymer adhesive must have a sufficiently high temporary adhesion strength. However, in the brazing operation using such a composite temporary adhesion agent-containing wax, in the heating and heating process. If the wax for temporary wear or the polymer adhesive remains, or if soot is generated when burned, the brazing property is significantly affected. Beyond the above, the wax or polymer adhesive begins to melt and flow, and at several hundred degrees the temporary wax or polymer adhesive permeates and is absorbed by the investment material (refractory material), and only the metal braze and the flux try to bond. It has the feature that it remains at the joint of the dental material. Then, when the temperature is further raised, the flux begins to melt, and then the metal brazing material melts to allow brazing.

The wax containing the temporary adhesive according to the present invention is not limited to the above-mentioned examples, and may be used for electrical contacts,
When used for brazing of electronic industrial parts, ornaments, etc., when temporary brazing is performed to determine the position and brazing is performed, the work efficiency is very good and the positioning accuracy is improved.

[0022]

Example A: A metal brazing material is Au25% Ag35% Cu15% Pd.
21% In13% alloy is melt-cast and average particle size is 100 ~
Molded into 150μm fine particles, mixed with flux powder,
A sticky wax (manufactured by GC Co., Ltd.) was mixed with a metal wax and a flux in a molten state, kneaded, and cooled to prepare a sticky temporary adhesive-containing wax. Then, using the wax containing the sticky temporary adhesive, two teeth (metal block) made by lost-wax casting a commonly used Au-Ag-Pd-based dental alloy for casting are placed on the patient's teeth. Set to fit and warm the tip of a small spoon made of stainless steel to melt the sticky tacky agent-containing wax in a fixed amount and place it between two teeth. I put it on temporarily. Then, after confirming the position and fixing to the investment material (refractory material), the temperature was raised and brazing was performed in the electric furnace. Table 1 shows an example thereof.

[0023]

[Table 1] Next, the flux powder is once heated and melted to 1000 ° C or higher,
Table 2 shows the results obtained by crushing the glass-like material into powder having an average of about 100 μm and performing the same in the same manner as the above embodiment.

[0024]

[Table 2]

[0025]

[Example B] Metal braze was prepared by using the same components as in Example A and having an average particle size of 40 μm by an atomizing method.
Flux powder, melting at 1000 ° C or higher, average particle size 50 μm
Melt the temporary wear wax using the powder of
The kneaded material is molded into an extrusion die, put into the extrusion die, and extruded at a temperature of 50 to 70 ° C.
The linear wax containing the temporary adhesive was prepared. The same wax containing Au-Ag-as that used in Example A was used with the wax containing the linear temporary adhesive.
A brazing operation was performed on the Pd-based dental alloy for casting. In this case, the temporary brazing filler metal-containing wax is warmed to flow to the joint portion of the tooth material and the necessary amount is placed on the dental alloy to complete the temporary fastening operation. After that, the fitting condition was confirmed, and the temperature was raised to perform brazing. The example is shown in Table 3.

[0026]

[Table 3]

[0027]

[Example C] A polymer adhesive powder was dissolved in ethanol, and a flux powder and Au-Ag-Pd-Cu-In were added thereto.
Powder of alloy 50 μm is kneaded, dried and pulverized to obtain a composite mixture powder. Then, when the brush is dipped in the polymerization agent and the composite mixed powder is applied to the brush, the polymer adhesive is polymerized and melted. Ni plate width 10mm, length 30mm, thickness 1mm2
The pieces were joined by butt brazing. The results are shown in Table 4.

[0028]

[Table 4]

[0029]

EFFECTS OF THE INVENTION In conventional brazing for dentistry, a cast metal denture (metal block) is temporarily attached on a working model or in the oral cavity with a temporary wax or polymer adhesive after trial fitting, and an investment material (fireproof material) is used. After fixing by, the melted wax of the temporary wearing wax or the polymer adhesive is brazed, then the flux is applied, and the temperature is raised by heating.
After the flux is melted, a brazing metal is placed on the brazing portion for brazing. Such a series of working steps is carried out according to the present invention by using a wax containing a temporary adhesive at the time of temporary adhesion using a wax for temporary adhesion or a polymer adhesive, a wax for a temporary adhesion, a polymer adhesive, a metal brazing material and a flux. It can be set at the same time, there is no need to heat and raise the temperature in order to run the temporary adhesive in the next step, and anyone who is not a technical expert can easily perform brazing, which is economical and economical. Significant effect on quality stability.

Claims (5)

[Claims] 1. A brazing filler metal for joining metals, ceramics or the like, which is a composite of a flux material and a temporary wax or a polymer adhesive. 2. A composite metal brazing material comprising 10% to 95% of a brazing material and 2% to 50% of a flux, the rest being a wax for temporary attachment or a polymer adhesive. 3. The brazing filler containing the above-mentioned item 1, which is characterized in that a wire, a plate or a powder of a metal brazing material is used. 4. A wax containing a temporary adhesive, characterized in that the flux is melted at a high temperature, and thereafter the flux formed into fine particles is used. 5. The brazing filler containing the above-mentioned 1 which is formed into a plate, a strip, a preform, a grain, a rod or a wire.