Processing examples of NBR rubber C-shaped gaskets
Supports multiple hole processing with water jet cutting ■ Overview of processing examples
Dimensions: 81W × 96L (Plate thickness 3t) This case is an example of a manufactured plate gasket made of NBR rubber with C chamfering (C2) processing. It has a shape of 81W × 96L, with three φ10 holes and six φ5 holes arranged in the structure. Since hole position accuracy and processing reproducibility are important for multiple diameters of hole processing, water jet cutting was adopted. This method allows for processing without thermal impact, ensuring a uniform cutting surface while maintaining the material's elastic properties. Furthermore, the C chamfering processing helps to reduce interference during assembly, contributing to improved workability and stable sealing performance. ■ Product Features (NBR Rubber) NBR (Nitrile Rubber) has excellent oil resistance, making it an ideal synthetic rubber for seals in fuel oils and lubricants. It also has high mechanical strength and wear resistance, and is widely used in O-rings, gaskets, hoses, etc. However, its weather resistance and ozone resistance are low, making it unsuitable for outdoor use; it is mainly utilized in indoor hydraulic and pneumatic equipment.
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■Processing Method (Water Jet Cutting) Water jet cutting is a hydraulic 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 caused by press processing can also be improved with water jet cutting.
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■Q&A Q: Is it possible to perform C-edge processing on rubber materials? A: Yes, it is possible. We can accommodate C-edge processing such as C2 based on drawing instructions. Q: Can you process different hole diameters simultaneously? A: Yes, with water jet processing, we can achieve high positional accuracy even with holes of different diameters. Q: Do you support prototyping or production from a single piece? A: Yes, we can accommodate that. We are flexible in handling small lots and custom shapes. ■Daiko's Capability At Daiko, we provide consistent support from material selection of NBR rubber to processing method proposals, including C-edge processing and multiple hole processing. We also flexibly respond to prototyping projects and custom processing based on provided drawings.
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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.'