Masahide Sumi

Title: Innovations by Masahide Sumi in Spark Plug Manufacturing

Introduction

Masahide Sumi is a notable inventor based in Gifu, Japan, recognized for his contributions to the field of spark plug manufacturing. With a total of 2 patents, Sumi has developed innovative methods that enhance the performance and durability of spark plugs.

Latest Patents

Sumi's latest patents include a "Method for manufacturing spark plug" and an "Apparatus for manufacturing spark plug." These inventions focus on improving the weld strength and service life of spark plugs by addressing issues such as depth insufficiency of the weld metal portion. The method involves attaching a noble metal chip to a chip joint face on the center electrode of a spark plug workpiece. A laser beam is then used to create a weld that intrudes into both the noble metal chip and the chip joint face, resulting in a robust noble-metal spark portion.

Another significant patent is a method that reduces the generation of spatters and the risk of insufficient weld strength. This method utilizes a heat-resistant alloy for the center electrode and employs a graded-index-type fiber optic cable to transmit the laser beam, ensuring precise welding.

Career Highlights

Masahide Sumi is currently employed at NGK Spark Plug Company, Limited, where he continues to innovate in spark plug technology. His work has significantly impacted the manufacturing processes within the company, leading to enhanced product quality and reliability.

Collaborations

Sumi has collaborated with notable colleagues, including Yutaka Taniguchi and Akio Sakura, contributing to a dynamic team focused on advancing spark plug technology.

Conclusion

Masahide Sumi's innovative approaches to spark plug manufacturing demonstrate his commitment to enhancing automotive technology. His patents reflect a deep understanding of materials and manufacturing processes, positioning him as a key figure in the industry.