High-precision manufacturing of large-diameter blind covers through press processing.
■Overview of Processing Example Product Name: Protective Seal for Flanges / Dimensions: 10K-450A FF Blind (10 Bolt Holes, Staggered Arrangement) / This processing example features a protective seal for flanges made from transparent PP sheet material. It was created to protect the piping flange surface from scratches and dirt during transportation and storage. Due to its blind cap shape, there are no inner diameter holes, and only the outer bolt holes are processed. By adopting press processing, we achieved uniform hole position accuracy and outer dimensions even in the mass production of 50 pieces. ■Product Features PP (Polypropylene) sheet is a lightweight, general-purpose resin material with excellent chemical resistance and water resistance. It has high transparency, allowing for internal visibility, and combines flexibility with moderate rigidity. It also has excellent impact resistance and is used in a wide range of applications such as protective covers, protective sheets, and packaging materials. It offers high cost performance and good processability.
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■Processing Method The manufacturing of sheet gaskets using a press machine and Thomson type is an efficient processing method that balances high quality, short delivery times, and excellent cost efficiency. At Daiko, we have established a robust mass production system with large presses of 300t and 100t, as well as high-speed automatic machines. Furthermore, by in-house designing and manufacturing of molds, we achieve optimal mold selection and process shortening, enabling us to respond promptly to our customers' urgent requests for short delivery times. ■Q&A Q: What applications are PP sheet protective seals used for? A: They are used to protect piping flange surfaces. They prevent scratches, dirt, and foreign substances from adhering during transportation and storage, maintaining a clean state until just before installation. Q: Why do you skip one bolt hole? A: The purpose is to improve workability during installation and removal and to reduce material costs. In protective applications, it is often unnecessary to secure all holes, allowing for sufficient fastening strength while achieving efficiency. Q: What are the benefits of selecting transparent materials? A: The condition of the flange surface can be visually checked while installed. You can check for scratches and dirt without removing it, contributing to the efficiency of quality control.
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Leave the processing of PP sheet protective seals to Daiko. We can flexibly accommodate everything from large-diameter flanges to compact sizes, from prototypes to mass production. We also accept custom dimensions and changes to bolt hole arrangements. With high precision and short delivery times through press processing, we meet our customers' needs.
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Company information
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.'
