KR100401044B1 - Manufacturing Process of Magnet Structure for Dental Attachement - Google Patents

Abstract

The present invention forms a magnet internal groove by drilling or milling a bulk stainless steel ingot, and then cuts a predetermined thickness at the edge of the magnet internal groove to manufacture an attachment cap, thereby minimizing the fatigue phenomenon that may occur in the attachment cap. By improving the strength and corrosion resistance of the magnet structure, the permanent magnet embedded in the attachment cap is treated with Ti and TiN coating by electron beam, so that the attachment cap is damaged and the saliva in the oral cavity penetrates the permanent magnet. Durability, corrosion resistance, and abrasion resistance can be minimized by increasing the corrosion resistance and improving the wear resistance by plasma nitriding the lower end of the attachment cap in contact with the keeper. Excellent dental attachment chair To provide a structural body.

Description

Manufacturing Process of Magnet Attachment {Manufacturing Process of Magnet Structure for Dental Attachement}

The present invention relates to a method for manufacturing a magnet structure for dental attachment, and more particularly to a method for manufacturing a magnet structure for dental attachment having good corrosion resistance, durability and wear resistance.

Conventionally manufactured and commercially available dental attachment magnet structures are mainly made of stainless steel attachment caps having a cylindrical shape, permanent magnets embedded in the attachment caps, and sealings such as covers or adhesives for sealing the attachment caps. By means of

However, the conventional magnet structure has some fatal disadvantages in corrosion resistance and durability, firstly, the attachment cap by deep drawing by pressing a plate-like stainless steel sheet to make a cylindrical attachment cap first; At this time, the side and bottom of the attachment cap, especially the bent portion, cause fatigue, that is, minute damage caused by repeated external force applied to the material. Due to scratching, the strength and corrosion resistance of the attachment cap are significantly reduced.

Second, the magnet embedded in the attachment cap uses Nd-Fe-B and Sm-Co permanent magnets, which are very susceptible to corrosion, and thus have a closed end that easily corrodes even if only a small saliva penetrates due to damage of the attachment cap. will be.

Therefore, the dental attachment using the magnet structure manufactured by the above method generates friction and impact between the magnet structure and the keeper during detachment or use, and serious corrosion occurs due to the weak strength and low corrosion resistance of the attachment cap. In addition, as the attachment cap is corroded, the magnet is corroded more quickly, and when a huge amount of expensive attachment is used for a short period (3 to 4 months), it can no longer be used.

This means that the user who can not only use dentures has the inconvenience of having to deal with multiple procedures, as well as having to consider huge economic losses.

The present invention is devised to solve the closed end of the conventional magnetic attachment magnet structure, first to form a magnet embedded groove by drilling or milling in a bulk stainless steel ingot, and at the edge of the magnet embedded groove The dental cap is manufactured by cutting the laser cutting device along the virtual cutting line formed to a certain thickness to minimize the fatigue phenomenon that can occur in the attachment cap and thereby significantly improving the strength and corrosion resistance of the magnet structure. It is to provide a magnet structure for attachment.

In another aspect, the present invention is to provide a magnet structure for dental attachment that can improve the corrosion resistance of the magnet by allowing the permanent magnet to be coated with Ti and TiN coating by the electron beam and then embedded in the attachment cap.

In another aspect, the present invention is to provide a magnetic structure for dental attachment that can minimize the damage caused by erosion corrosion by improving the wear resistance by plasma nitriding the lower end of the attachment cap in contact with the keeper.

1 to 6 is a reference diagram for showing a manufacturing process of the magnetic structure of the present invention.

7 is a reference view of the state of use of the magnetic structure of the present invention.

* Explanation of symbols for main parts of the drawings

1: Magnet structure for dental attachment (hereinafter referred to as magnet structure)

2: keeper

11: attachment cap 12: permanent magnet

13: cover

100: stainless steel ingot 200: magnet built-in groove

300: cutting line

A: Denture B: Abutment

The present invention will be described in detail with reference to the accompanying drawings.

The present invention is to reinforce the corrosion resistance and durability of the magnetic structure (1) for dental attachment, and provides a new method of manufacturing the attachment cap (11), which deviates from the conventional deep drawing method for which fatigue is inevitable. The permanent magnet 12 embedded in the attachment cap 11 can be further strengthened corrosion resistance by coating Ti and TiN by an electron beam, and the lower end of the attachment cap 11 in contact with the keeper 2 is plasma nitrided. This minimizes damage due to erosion corrosion by improving wear resistance.

The present invention is described in detail by process as follows.

First, the stainless steel ingot 100 in a bulk state is machined into a circular magnet embedded groove 200 by milling or drilling. This is well represented in FIG. 3, which shows the cross section of FIGS. 2 and 2.

The height of the stainless steel ingot 100 should be equal to the height of the attachment cap 11 of the magnet structure 1 to be manufactured. In the present invention, a stainless steel ingot 100 of 3mm height was used as a sample.

The stainless steel ingot 100 is preferably using a ferritic stainless steel containing Tidan (Ti) to enhance the corrosion resistance.

Next, the stainless steel ingot 100 is cut with a laser cutting device, not shown, along a virtual cutting line 300 formed by a predetermined thickness at the edge of the magnet embedded groove 200.

Therefore, the attachment cap 11 of the cylindrical container shape as shown in FIG. 4 is manufactured.

Next, the permanent magnet 12 is embedded in the magnet built-in groove 200 of the attachment cap 11, and after the permanent magnet 12 is embedded, the upper end of the attachment cap 11 is bonded with resin or made of stainless steel. The cover 13 is covered and then laser welded to seal the cover 13.

In this case, since the permanent magnet 12 is a material having very low corrosion resistance, if microcracks or pores exist in the attachment cap 11, saliva penetrates easily and causes expansion of the volume, thereby causing a loss of magnetic force at a very high speed. Therefore, a separate treatment for improving the corrosion resistance is required.

Therefore, in the present invention, after the Ti or TiN coating treatment on the surface of the permanent magnet 12 is embedded in the attachment cap 11 and then sealed, the Ti or TiN coating treatment on the permanent magnet 12 uses a known electron beam vacuum deposition method. It was.

The electron beam vacuum deposition method is a method of forming a thin film by irradiating an electron beam of a metal, a metal compound or an alloy in a vacuum to condense the evaporated metal or the evaporated metal compound on the surface of the target material. By coating TiN by electron beam vacuum deposition, the attachment cap 11 is damaged, and even if saliva in the oral cavity is penetrated, the corrosion resistance of the permanent magnet 12 can be increased to extend the period of magnetic loss.

The sealing of the magnet structure of the present invention (1) is a plasma nitridation of the lower end, which is usually formed on the upper end of the abutment (B) of the lower end of the magnet structure (1) formed on the lower end of the denture (A) In order to minimize the erosion-corrosion caused by frequent friction and impact in contact with the upper end of the keeper (2) to extend the life of the product, the embodiment of the plasma nitriding method of the attachment cap 11 Will be explained.

In other words, the processed specimen was polished with 1000 grit of emery paper and cleaned in an alcohol solution with an ultrasonic cleaner, and then, it was installed on the cathode of the plasma nitriding device and a mixed gas of N2 + H2 (1: 1) was pressured to 6 torr. It was given to wear resistance by nitriding for 3 hours at 550 ℃.

At this time, the plasma nitriding treatment is also performed on the upper surface of the keeper 2 to provide a dental attachment with enhanced durability along with the magnet structure 1 of the present invention having improved wear resistance.

The present invention forms a magnet internal groove by drilling or milling a bulk stainless steel ingot, and then cuts a predetermined thickness at the edge of the magnet internal groove to manufacture an attachment cap, thereby minimizing the fatigue phenomenon that may occur in the attachment cap. By improving the strength and corrosion resistance of the magnet structure, the permanent magnet embedded in the attachment cap is treated with Ti and TiN coating by electron beam, so that the attachment cap is damaged and the saliva in the oral cavity penetrates the permanent magnet. The corrosion resistance is increased to extend the period of magnetic loss.

In addition, the present invention improves wear resistance by plasma nitriding the lower end of the attachment cap in contact with the keeper, thereby minimizing damage due to erosion corrosion, thereby obtaining a dental attachment magnetic structure excellent in durability, corrosion resistance and abrasion resistance. It has an effect.

Claims (3)

Fabrication of a dental attachment magnet structure comprising a stainless steel attachment cap having a cylindrical shape, a permanent magnet coated with Ti and TiN embedded in the attachment cap, and sealing means such as a cover or an adhesive for sealing the attachment cap. In the way The attachment cap is manufactured by forming a magnet embedded groove by drilling or milling a stainless steel ingot in a bulk state, and cutting it with a laser cutting device along a virtual cutting line formed by a predetermined thickness at the edge of the magnet embedded groove. Method for producing a magnetic structure for dental attachment, characterized in that. delete The method of claim 1, wherein the lower end of the attachment cap is plasma nitrided manufacturing method of the magnetic structure for dental attachment.