TOMBO No.1120 Example of Processing an Oval-Shaped Gasket
High-precision processing of large elliptical shapes with a water jet.
■Overview of Processing Example Product Name: TOMBO No.1120 Oval Gasket / Dimensions: Thickness 3t × Inner Dimensions 300W × 400L / This processing example features a large oval gasket made from expanded graphite joint sheet. It was manufactured for steam lines and exhaust systems in high-temperature environments. The oval shape is cut with high precision using water jet processing, achieving a uniform width sealing surface. ■Product Features TOMBO No.1120 is a joint sheet primarily composed of expanded graphite, with aramid fibers and NBR added. It excels in heat resistance, steam resistance, and corrosion resistance, and is characterized by its flexibility and scratch resistance. It is suitable for water, steam, oil, exhaust gases, etc., and is widely used in relatively high-temperature flanges and valves in petroleum refining, chemical plants, power plants, and more.
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■Processing Method Water jet cutting is a water pressure cutting machine that uses high-pressure water to cut materials. It processes by spraying high-pressure water. By changing the injection nozzle according to the processing material, high-quality products can be produced in a short time. Additionally, the dimensional tolerances that are significantly affected by traditional manual processing are greatly improved, resulting in stable processing accuracy. The taper on the cutting surface from press processing can also be improved with water jet processing. ■Q&A Q: What is the dimensional accuracy of elliptical gaskets? A: Water jet processing allows for high-precision processing of approximately ±0.5mm. Compared to manual processing, it significantly reduces dimensional variation. Q: What is the temperature range for TOMBO No.1120? A: It can withstand continuous use temperatures of up to about 260℃. It is suitable for steam lines and high-temperature exhaust gas equipment. Q: Can you accommodate shapes other than elliptical? A: Yes, if CAD data is available, we can handle complex shapes as well. Please feel free to consult with us.
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Please leave the processing of TOMBO No.1120 and other expanded graphite gaskets to Daiko. We can flexibly handle everything from prototypes of special shapes such as oval and irregular shapes to small lot production and mass production. Feel free to consult us about custom gaskets for high temperature and high pressure environments.
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Daiko is a manufacturer specialized in processing various industrial products, including gaskets and packing. With industry-leading processing equipment, including one of Japan's largest water jet cutting machines, and a wide range of materials such as joint sheets, rubber, resin, and metal, we meet our customers' diverse needs. Leveraging the technology and experience we have cultivated over 50 years, we provide high-quality, short-lead-time, and low-cost products to contribute to solving our customers' challenges. To respond to our customers' varied needs, Daiko's production bases are equipped with various processing facilities. Among them, the water jet cutting machines, with a total of four installed at our Osaka headquarters and Tokyo branch, boast one of the largest scales in the country. The maximum processing range is W4,000 × L5,500 mm, allowing for the high-precision manufacturing of large-diameter gaskets and packing. By maximizing material efficiency, we achieve the provision of 'high quality at low cost.'