セイリン List of Products and Services

We would like to introduce a case where our products were used for the sample containment brought back by Hayabusa2 (the asteroid exploration spacecraft). We manufactured and provided a needle with a pointed tip made from non-magnetic and relatively lightweight element, titanium 64. In addition to acupuncture needles for medical devices, we also perform needle processing based on the materials and shapes requested by our customers. 【Case Overview】 ■ Issue: A shape resembling a cut-off tip is required for sample handling. ■ Proposal - We manufactured and provided a needle with a pointed tip made from titanium 64, which is composed of non-magnetic and relatively lightweight elements. - The tip cutting process was carried out by the customer's business partner. *For more detailed information about the case, please refer to the related links. For further details, please check the PDF materials or feel free to contact us.

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In response to the customer's request for "a more rounded and sharper tip," we have been working on improving our tip processing technology. Seirin's tip processing technology has now made it possible to achieve a sharp processing tip radius of 1μm. Of course, it is also possible to process a more rounded tip (larger round tip with a radius of 15μm). We can process tips to be rounded, sharp, or thicker, and we can provide stable supply according to the shapes desired by our customers. Additionally, we conduct full inspections to maintain stable quality during mass production. 【Examples】 ■ Sharp processing ■ Size: Tip radius 1μm *For more details, please refer to the external link page or feel free to contact us.

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The thinnest acupuncture needles that Seirin typically manufactures are φ0.1mm in diameter and 15mm in length. In this context, we received a request from a medical device manufacturing customer for "φ0.08mm and 60mm in length with straight processing and tip processing." Straight processing of metal wire becomes more difficult as the diameter decreases, making it easier to break and bend, and the longer the length, the higher the difficulty level. The request for tip processing was for "sharp processing." In needle tip processing, the thinner the needle, the more challenging the processing becomes, and prior to that, handling (automated transport) itself becomes difficult. Despite these challenging conditions, we achieved stable precision. [Case Study] ■ Stable supply of straight processing and tip processing of metal wire ■ Size: 0.08mm *For more details, please refer to the external link page or feel free to contact us.

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We received a request from a semiconductor manufacturer stating, "We want to work with a hard material," and we took on the challenge of advanced processing of difficult-to-cut materials. Tungsten, which is used in projectiles due to its high density and hardness, and titanium, which has strength greater than steel, are considered difficult-to-cut materials. Tungsten itself is a material with extremely high hardness, used in high-end cutting tools. The customer's request was for "advanced processing of φ0.1mm tungsten." Wires made of hard materials have less flexibility, making them prone to breaking easily. Additionally, due to their hardness, they take longer to cut. Overcoming these challenges, Seirin's advanced processing technology successfully achieved the desired processing of the material as per the customer's request. [Case Study] ■ Advanced processing of tungsten ■ Size: φ0.1mm *For more details, please refer to the external link page or feel free to contact us.

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After achieving a stable supply of straight processing for φ0.08mm metal wire at Seirin, we began working on straight processing for thinner wire, specifically φ0.05mm metal wire. It is said that the thickness of a human hair is φ0.08mm. The φ0.05mm wire is thinner, which makes it prone to strong curling and very easy to break with just a little force, making it quite difficult to handle. Our development team has gone through trial and error and successfully achieved straight processing without damaging the surface of the metal wire. [Case Study] ■ Straight processing of metal wire ■ Size: φ0.05mm *For more details, please refer to the external link page or feel free to contact us.

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At Seirin, we are working on a more precise "tip grinding processing technology." As a result, we have achieved a high precision of roundness at 0.235 µm with no wear on the tip spherical surface processing. This time, the roundness measurement data was provided by Mitaka Optical Co., Ltd. With high roundness accuracy, we can access the targeted location without any axis deviation. Additionally, we have successfully achieved high precision spherical surface processing with a roundness of 0.904 µm even at a distance of 300 µm from the tip, with no wear. Our company has realized mass production of high roundness spherical surface processing even for ultra-fine wires of φ0.08 mm, enabling stable supply. [Case Studies] ■ Spherical processing with high roundness ■ Accuracy - Roundness of 0.235 µm at a distance of 7 µm from the tip - Roundness of 0.904 µm at a distance of 300 µm from the tip *For more details, please refer to the external link page or feel free to contact us.

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We would like to introduce a case study from Seirin Co., Ltd. regarding "linear processing and tip processing of metal wires under 10mm in length." The shortest needle we typically manufacture is 32mm in length. Recently, we received a request from a customer for "linear processing and tip processing of lengths under 10mm." Through trial and error, we successfully achieved linear processing and tip processing for a length of 10mm. The tip processing can accommodate both sharp processing and spherical processing. [Case Study] ■ Linear processing and tip processing of stainless steel wire ■ Length: under 10mm *For more details, please refer to the external link page or feel free to contact us.

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We would like to introduce a case study from Seirin Corporation, which performs straight processing and tip processing of ultra-fine metal wires, focusing on "lancet-shaped tip processing." The tips of the acupuncture needles we manufacture have an original shape known as the "improved pine leaf shape," which mimics the shape of pine needles. Recently, we received a request from an overseas customer to prototype a needle processed into a lancet shape using wire instead of a tube. We processed a φ0.35 straight wire into a lancet shape. [Case Study] ■ Lancet-shaped tip processing ■ Size: φ0.35 *For more details, please refer to the external link page or feel free to contact us.

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We would like to introduce a case study from Seirin Co., Ltd. on "Titanium Wire Processing and Mass Production," which involves straight processing and tip processing of ultra-fine metal wires. Titanium is known for its excellent properties such as lightweight, high strength-to-weight ratio, corrosion resistance, biocompatibility, and non-magnetic characteristics, but it is also considered a difficult material to process. We can accommodate mass production of straight processing and sharp tip processing of such titanium wires. Similar to stainless steel wires, we can produce lengths ranging from 10mm to 2,000mm and quantities from 100 to over 1,000,000 pieces per month. We will do our best to meet your requirements regarding wire diameter and other specifications, so please let us know your needs. [Case Study] ■ Titanium Wire Processing, Mass Production ■ Size: φ0.2mm *For more details, please refer to the external link page or feel free to contact us.

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We would like to introduce a case study of Seirin Co., Ltd., which performs straight processing and tip processing of ultra-fine metal wires, focusing on "tungsten carbide needle tip processing." Our company mainly processes SUS304 wire to manufacture needles. We received inquiries from the electrical and electronics industry asking if we could make needles from tungsten carbide. At that time, we responded that we were unsure if it was possible, but after trying it out, we successfully completed tungsten carbide needles. [Case Study] ■ Tungsten carbide needle tip processing ■ Shapes - Long taper - General pencil point shape - Blunt angle shape We are also open to inquiries about "tungsten carbide" needles or hard materials. *For more details, please refer to the external link page or feel free to contact us.

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We would like to introduce a case study of Seirin Co., Ltd. regarding the straight processing and tip processing of ultra-fine metal wire made of SUS304, along with photographs. Lengths can range from 5mm to 2000mm. Seirin's straight processing technology is evolving daily. Additionally, we are constantly working on the development of technologies that can respond quickly to customer requests. [Case Study] ■ Straight processing of φ0.032mm ultra-fine wire ■ Material: SUS304 *For more details, please refer to the external link page or feel free to contact us.

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Seirin Co., Ltd. developed and launched disposable acupuncture needles in 1978. Since then, we have consistently pursued our management philosophy of contributing to the modernization of acupuncture medicine, that is, "realizing safe and effective acupuncture treatment." In response to changes in the global environment and the needs of a new era, Seirin will continue to develop safer and more reliable products under the theme of "kind to people," and provide them worldwide. 【Business Activities】 ■ Development, manufacturing, and sales of medical devices *For more details, please refer to the PDF document or feel free to contact us.

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The "Seirin Comprehensive Catalog" is a catalog that features medical devices developed utilizing the technology of straight processing and tip processing of ultra-fine metal wires. It includes products such as the "JSP/J15sp," which achieves a smooth insertion with a rounded needle tip, the "Pionex" skin needle that uses breathable tape, and the compact and multifunctional "Pediatric Skin Needle." [Contents (excerpt)] ■ Seirin Needles ■ Seirin Round Skin Needles ■ Seirin Tape-Equipped Contact Devices ■ Seirin Intradermal Needles ■ Seirin Pediatric Skin Needles *For more details, please refer to the PDF document or feel free to contact us.

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Seirin Co., Ltd. has achieved mass production of ultra-fine wire spherical shapes that were previously unattainable by establishing "ultra-advanced polishing processing" technology in addition to conventional grinding processing. We also perform straight processing of ultra-fine metal wires. The materials used are mainly hard materials such as stainless steel wire. We cut coil-shaped wire to the desired length and thickness and straighten it. Please consult us for materials other than stainless steel. 【Features】 ○ Strict manufacturing and quality control ○ Integrated production system ○ Control in units of 1/1000mm ○ Established insert molding technology ○ Safe domestic processing and domestic production For more details, please contact us or download the catalog.

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