Since the surface pressure concentrates on the protruding part at the time of sealing, the sealing performance is improved even for large-diameter flanges that are prone to distortion!
We would like to introduce a processing example of the "EPDM large-diameter gasket with R-shaped protrusions," which has been adopted for large connection flanges of water treatment equipment and various tanks and ducts. This special specification is based on a flat gasket with an outer diameter of φ710mm and a thickness of 5mm, with rubber protrusions (ribs) in an R5 shape (semi-circular) bonded to both sides along the central circumference of the sealing surface. By combining water jet cutting and advanced manual bonding techniques, we achieved short lead times and reduced initial costs without the need to create expensive large-diameter molding molds. [Case Overview] ■ Challenges - Gaskets with ribbed molded shapes require molds costing several million yen. ■ Key Processing Points - High sealing achieved through bonding technology between the flat plate and R protrusions. *For more details, please refer to the related links or feel free to contact us.
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【Specifications】 ■Dimensions/Standards: 5.0t × φ710 (outer diameter) × φ610 (inner diameter) [P670 / 24-φ19 holes] ■Material/Structure: EPDM (ethylene propylene rubber) / Base material (5t flat plate) + Upper and lower R5 protrusions (rubber cord adhesion) ■Processing Method: Water jet cutting + Craftsman's precision R cord endless adhesion *For more details, please refer to the related links or feel free to contact us.
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For more details, please refer to the related links or feel free to contact us.
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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.'
