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.
AI-assisted directory summary. Technical specifications, performance metrics, readiness and compliance labels are unverified unless individually supported and reviewed. Proposed partnership routes do not establish supplier consent, export eligibility, or willingness to sign an NDA. Confirm claims and test conditions with the linked sources and supplier before procurement or citation.
Problem solved
High-conductivity Al/Cu jackets are hard to melt-weld or braze without porosity, slag, or whole-part overheating; lid-thickness variation after finishing also creates hot spots. The shop mills channels and FSW-seals the lid on one hybrid machine, then press-corrects warp so the lid thickness (path from coolant to the heat-source face) is uniform.
Application contexts
- Custom liquid cold plates for process equipment and vacuum chambers
- Aluminum or copper jackets where braze voids or melt-weld porosity are unacceptable
- Stainless jackets that must hold vacuum-side leak tightness and a flattened heat-source face
Technical principle
Jacket = grooved base + lid. FSW: rotating tool, 1.2 t downforce, 4–6 mm stir depth, solid-state join below melting point; then ~1 mm face mill so the joint line disappears. Stainless: TIG lid weld plus press flattening; contact flatness stated within 0.2. Joining options also listed: vacuum braze, EBW. Max envelope φ800 mm or 1000 × 2000 mm. All parts customer-spec.
Typical use cases
- A6061 FSW cold plate, 60–270 mm, medical or automotive equipment prototype
- C1020 oval copper jacket with distortion correction after machining
- SUS304/316 circular jacket 400–900 mm for vacuum tools
Partnership route
How global engineering teams typically engage this asset.
Helpful to include: heat-source map and target T · coolant and allowable pressure drop · material (Al/Cu/SUS) · envelope and lid thickness · leak-test standard · whether the order should be placed to Hisamatsu Kiko Fujisawa after the 2026-02-27 transfer
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Source & provenance
Translation review status: unreviewed. Publication does not establish technical verification or supplier endorsement.
Original language: JA.
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.
- 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.
- アルミ製コールドプレート
https://kyoyu-ss.co.jp/case/coldplate4/
Primary-source candidate; 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.