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Kyoyu Seisakusho Co., Ltd.

Fujisawa, Kanagawa, Japan Unknown · unverified Japanese Founded 1973 Official site

15-person Fujisawa job shop that machines and joins custom liquid-cooled jacket cold plates in aluminum, copper, and stainless steel, using friction-stir welding for Al/Cu lids and TIG plus distortion correction for stainless.

AI-assisted directory profile. Export readiness, certifications, technical claims and partnership preferences are unverified unless individually supported and reviewed. Listing does not establish supplier endorsement or willingness to enter an NDA. Confirm with the original sources and supplier before procurement or citation.

Core capabilities

  • Friction-stir welding (FSW) of aluminum and copper cold-plate lids on the same hybrid machining center as channel milling
  • Custom water-jacket cold plates in Al, Cu, and stainless steel
  • TIG hermetic welding plus press-based distortion correction for stainless jackets
  • Vacuum chamber and backing-plate fabrication

Related capability assets

FSW-joined custom liquid cold plates in aluminum, copper, and stainless

Customer-spec water-jacket cold plates: channels milled in the base, lid joined by friction-stir welding (Al/Cu) or TIG (stainless), then press-straightened so lid thickness—and therefore cooling—is uniform across the heat-source face.

Source & provenance

Translation review status: unreviewed. Publication does not establish technical verification or supplier endorsement.

Record updated: .

  • コールドプレートの設計・製作

    https://kyoyu-ss.co.jp/cold-plate-development/

    Primary-source candidate; evidence review: pending.

    Source accessed / recorded (collector timestamp): .

    Source publication date: Not recorded.

  • 会社概要

    https://kyoyu-ss.co.jp/company/

    Primary-source candidate; evidence review: pending.

    Source accessed / recorded (collector timestamp): .

    Source publication date: Not recorded.

  • 摩擦攪拌接合(FSW)

    https://kyoyu-ss.co.jp/fsw/

    Primary-source candidate; evidence review: pending.

    Source accessed / recorded (collector timestamp): .

    Source publication date: Not recorded.

  • 事業譲渡のお知らせ

    https://kyoyu-ss.co.jp/news/20260227-2/

    Supporting / discovery source; evidence review: pending.

    Source accessed / recorded (collector timestamp): .

    Source publication date: Not recorded.

Collector timestamps record when a source was stored, not an independent verification date. Source links provide context; they do not validate every specification, readiness label, certification, or proposed partnership route.