High Precision and Difficult Processing Technology Exhibition 2023

Joining precision parts without melting the base material.

This time, I would like to introduce examples of joining using silver solder. There are various methods for joining metals, such as gas welding, arc welding, laser welding, and electron beam welding, all of which involve melting the base material to join them. On the other hand, in the case of brazing, a filler material with a lower melting point than the base material is melted to join the parts, allowing for the joining of complex shapes or precision parts without melting the base material. Additionally, with metallization treatment, it is also possible to join metals and ceramics. The common method for melting the filler material is using a gas burner, but high-frequency induction heating or heating furnaces may also be used, and the optimal method is chosen based on the size, shape, and quantity of the parts to be joined. I am looking forward to trying various materials in the future. Furthermore, I can offer proposals that include not only joining but also shape processing, so please feel free to consult with me. ■ Cross-sectional images Cu + Cu (Copper + Copper) W + Cu (Tungsten + Copper) Mo + Cu (Molybdenum + Copper) Mo + Mo (Molybdenum + Molybdenum)

• Analytical Equipment and Devices

"I want conductive alumina ceramic!" Background and an overview of the development will be introduced.

This case study collection includes solutions to problems related to tungsten and high melting point metals. We introduce numerous cases such as "I want an alternative to thorium tungsten," "I want tungsten that is easy to process," and "I want conductive alumina ceramic." We also provide background information and an overview of the development for each case. Please take a moment to read through it. [Contents (excerpt)] ■ I want an alternative to thorium tungsten ■ I want tungsten that is easy to process ■ I want conductive alumina ceramic ■ I want tungsten that can discharge even at low energy ■ Ultra-high temperature! Development of a 2800°C vacuum furnace *For more details, please refer to the PDF document or feel free to contact us.

• Technical and Reference Books

We have ultra-high temperature heat treatment furnaces! We will address your challenges with our years of heat treatment technology. Leave the coating and brazing of metals and ceramics to us!

We would like to introduce some coating examples. This one is tungsten coated with alumina (Al2O3). To enhance thermal efficiency, we have further coated the alumina coating with (alumina + tungsten). This is a component inside the cathode used in electric propulsion systems for small satellites, but it seems to be used in other applications as well. Our company has a well-equipped heat treatment furnace, and in addition to coating, we respond to various requests such as brazing and material development. We also accept commissioned processing from research and development, so if you have any concerns, please feel free to consult us first. ◆ We will propose solutions utilizing our heat treatment furnace tailored to your needs: - Coating - Brazing - Functional material development - Sintering - Residual stress removal - Crystal grain size control - Oxide removal - Contamination removal - Degassing - De-greasing ...and more.

• Contract manufacturing

Metals and ceramics: We will propose the optimal heat treatment tailored to your needs!

Generally, high-temperature heat treatment takes several hours, which can be costly and time-consuming. Gakuseki Electric has been conducting heat treatment of high melting point metals and ceramics, including tungsten. In particular, to quickly and efficiently perform heat treatment for small, low-volume, and diverse products, we have repeatedly conducted various experiments and successfully developed a high-speed high-temperature vacuum furnace capable of reaching approximately 2700°C. With this equipment, ■2500°C for 30 minutes ⇒ The entire process from the start of heating to cooling down is completed in about 2 hours! We have achieved efficiency and cost reduction. Additionally, substances that cannot be completely removed in general furnaces can also be heated and removed. ーーー We also accommodate various high-temperature heat treatments, including multi-atmosphere sintering furnaces and forming gas flushing furnaces. Through these high-temperature heat treatments, it is possible to ultimately prevent the residue and contamination of impurities. With decades of accumulated experience and know-how in heat treatment, please leave the heat treatment of metals to Gakuseki Electric. ーーー

• Processing Contract

From prototyping to mass production of difficult-to-machine materials such as tungsten, molybdenum, and tantalum.

We perform precision machining of difficult-to-cut and difficult-to-process materials such as tungsten, molybdenum, and tantalum. For mass production, we automate the process using feeding machines, while for prototypes ranging from one to a few pieces, we respond quickly with manual operations. In particular, precision machining of small products with tolerances in the micron or millimeter range is our specialty. ◆ Precision machining using NC lathes and other machine tools We utilize NC lathes, MC multi-tasking machines, milling machines, centerless grinders, automatic precision cutting machines, wire-cut and electrical discharge machines, automatic surface grinders, injection molding machines, extrusion molding machines, and presses. ◆ In-house automatic assembly and processing machines We have a wide range of in-house developed fully automatic machines, including fully automatic hot press machines, automatic heater coil assembly machines, and fully automatic electrode assembly machines. Gakuseki Electric often takes on the manufacturing of products that other companies are reluctant or unable to produce. If there are no machines available in the market for manufacturing, we design and build our own processing machines. ◆ Processing - Cutting - Machining - Milling - Cutting - Tapering - Drilling *Sizes, precision, and handled materials are detailed in the "Basic Information" section.

• Contract manufacturing

Active in medical X-rays, non-destructive testing equipment, mass spectrometry devices, and more.

■Background of Development For many years, we have been commercializing various shapes of filaments using tungsten. However, in recent years, with advancements in science and technology, customer needs have diversified, making it increasingly difficult to meet their demands with tungsten alone. ■Overview of Development With the aim of enhancing the functionality of filaments, examples of customer requests included "insulation," "corrosion resistance," and "low work function." In response, we have incorporated the following into our filaments: ● Aluminum oxide (alumina) for [insulation] (Coating alumina onto tungsten coils) ● Yttrium oxide (yttria) to provide [corrosion resistance] and [low work function], successfully enhancing functionality. (Coating yttria (Y203) onto the filaments) ■Details of Development In developing the coating technology, we adopted a certain method. While it is a common approach, it is based on [our unique equipment and manufacturing process]. We optimize factors such as particle size, mixing ratio, and film thickness through experimental investigation, but this is not easy. Ultimately, the number of experiments has reached into the thousands, and we continue to work on quality improvement.

• Processing Contract

Active in medical X-rays, non-destructive testing equipment, mass spectrometers, and more.

■Development of Molybdenum-Ruthenium Filler Metal This filler metal is used for joining (brazing) high melting point metals due to its high melting point, but it is not commercially available, so it was necessary to procure the materials independently. Using the developed filler metal, we attempted brazing between tungsten pieces. *The left side of the photo shows porous tungsten.* Photo 1: Observed by a CCD camera. This is a failed example where a large gap occurred at the joint. In reality, it was quite difficult to achieve a good result. Photo 2: Successful example! (The joint is in the center of the photo.) Photo 3: Reflection electron image by SEM. It can be seen that the joint is made without gaps due to the filler metal. Photo 4: Element mapping. The joint area has become clear. Perhaps due to its porous nature, the filler metal seems to have diffused on the left side. ◆Our company possesses a super high-temperature heat treatment furnace capable of up to [2700°C]. We have numerous furnaces that can accommodate various atmospheres and offer solutions utilizing heat treatment furnaces tailored to your needs. - Coating - Brazing - Functional material development - Sintering - Residual stress removal - Grain size control - Oxide removal - Contamination removal - Degassing - De-greasing ...and more.

• Processing Contract

Utilizing the properties of Ni-Ti alloy, along with a safe coating that can be used within the body.

Now, let me introduce the "Ni-Ti Coating Coil." It may sound a bit confusing as I write this, but here are the processes involved: (1) Coiling of Ni-Ti (high elasticity, shape memory alloy) (2) Shape memory treatment (500°C) (3) PTFE coating The Ni-Ti alloy is known for its superelasticity, and we plan to develop products that leverage this characteristic. By applying a PTFE coating, the design is safe for insertion into the body. Additionally, PTFE allows for color selection based on purpose (please consult for color variations). As a side note, the current sample is intended for orthodontic purposes, and there was a request for a slightly yellowish white instead of a bright white, as the latter would be too conspicuous (though it would be a perfect match for Coach Shinjo). This also depends on user preferences, but in Western countries, due to high medical costs, there is a perception that "orthodontics = wealth," leading to opinions that some may want it to stand out more.

• Contract manufacturing

We would like to extend our heartfelt congratulations on the continued prosperity of your esteemed company. Our company will be exhibiting at the following trade show, where we will showcase a variety of products, including new ones. We sincerely invite you to visit us during this busy time. 【 Exhibition Name 】 Automotive Technology Exhibition 2025 YOKOHAMA https://aee.expo-info.jsae.or.jp/ja/yokohama/ (An "online exhibition" will also be held during and around the event period) 【 Dates 】 May 21 (Wednesday) - 23 (Friday), 2024 10:00 AM - 6:00 PM *On the final day, 9:00 AM - 4:00 PM (Online exhibition: May 14 (Wednesday) - June 4 (Wednesday)) 【 Venue 】 Pacifico Yokohama (1-1-1 Minatomirai, Nishi-ku, Yokohama, Kanagawa Prefecture) Our booth number: "Concourse 505"

We would like to extend our heartfelt congratulations on the continued prosperity of your esteemed company. Our company will be exhibiting at the following trade show, where we will showcase a variety of products, including new ones. We sincerely apologize for the inconvenience during your busy schedule, but we would like to invite you to attend this event. 【 Exhibition Name 】 27th INTERPHEX Week Tokyo https://www.interphex.jp/tokyo/ja-jp.html 【 Dates 】 July 9 (Wednesday) - 11 (Friday), 2025 10:00 AM - 5:00 PM 【 Venue 】 Tokyo Big Sight (3-11-1 Ariake, Koto-ku, Tokyo 135-0063)

Nitto Kohki will hold the "2025 Attack Fair in Meiko" for two days from July 23 (Wednesday) to July 24 (Thursday), 2025, at the "Kowa Seminar Plaza 2F Training Room NO.12 (inside Kowa Sports Land)." The Attack Fair is an exhibition where you can actually "see, touch, and operate" Nitto Kohki's products. Additionally, there will be wonderful souvenirs for attendees and many fun activities planned. We look forward to welcoming everyone!

On February 13 (Friday), we will be exhibiting a corporate panel at the Interphex Conference in Toyama. We sincerely look forward to your visit. Event Name: Interphex Conference Toyama 2026 Date: February 13, 2026 (Friday) Venue: Toyama International Conference Center Panel Content: New Proposals for Tablet Pressing Issues (TL Business: PVD Coating Processing)

We will be exhibiting at the "23rd Japan Yarn Fair" held at the Ichii Shinkin Arena on February 19 (Thursday) and 20 (Friday), 2026. We will showcase a variety of knitted samples, including pullovers and one-pieces made with our computer-controlled flat knitting machines, apparel knit products for sports and outdoor activities, knitted accessories and goods such as socks, gloves, hats, scarves, leggings, and bags, as well as knitted interior products like chairs, cushions, and rugs. Additionally, we will present industrial knitted materials for wearable mobility. We will also introduce our design software, APEXFiz Design, and our web service platform, SHIMA SEIKI Online Services. Booth No.: Sen-1 Exhibition Contents: Knitted Samples APEXFiz Design (Design Software) SDS KnitPaint-Online (Knitting Software) yarnbank (Comprehensive Web Service for Yarn Information) SHIMA Datamall (Digital Content Web Service) <Contact Information> Nishi-Nihon Branch, Kodama, TEL: 0725-31-0511