Skip to main content

Hitachi

Corporate InformationEnvironmental Activities

[Image] The environment is taken into account starting from the production phase.

Renewing the structure and production system of railway vehicles for environmental conservation to promote energy and resource savings.

Kasado Works, Rail Systems Business Unit, Hitachi, located in Kudamatsu City, Yamaguchi Prefecture in Japan, develops and manufactures railway and Shinkansen vehicles that feature lightweight aluminum raw materials. The Division has adopted a joining technology called “Friction Stir Welding” that only softens parts to be joined using friction heat for vehicle assembly. Since this method can be performed without melting aluminum, the required heat value is smaller than that used in conventional welding methods, thus reducing electricity usage per vehicle by 46%. “High-speed 3 dimensional machining technology” is used in the manufacture of Shinkansen's leading vehicle, which features a unique shape to reduce air resistance to the maximum extent. Smoothly machined surfaces have successfully reduced the amount of coating “putty” used to eliminate convex and concave portions on the surface by 89%, and also have drastically reduced the amount of chemical substances contained in the coating. The rate of reused water for the water proof test can be 100%. Furthermore, since FY 2002, it has achieved zero emission* of waste and a final disposal rate of less than 0.1% through various activities.

The factory roofs coated with thermal insulating ceramic provide cooler work places and a smaller air conditioning load.

*
Zero emission: Defined as a final disposal rate (landfill disposal/waste) of less than 0.5 percent in any given year.

Eco-Factories & Offices Select Certification Item

[Image] Recycling of waste and other resources

Recycling of waste and other resources
Achieved a final disposal rate of less than 0.1%, and 100% registration rate in electronic manifests in Japan (FY 2015)

Product Information

[Image] A-train

A-train
This railway vehicle adopts highly recyclable and lightweight aluminum materials; it is smaller processing deformation and beautiful without coating, thanks to a joining technology called “Friction Stir Welding”. The A-train is named after“ the initial ”A of four words: “Aluminum”, “Advance”, “Amenity”, and “Ability”.