Seam weld stainless steel sinks — faster, tighter, smarter.

Hwashi CNC Seam Welding Machine delivers continuous roller seam welding for kitchen sink manufacturing. MFDC inverter technology + Mitsubishi 3-axis servo control (X/Y/A) produce airtight, watertight seams on single, double, and triple-bowl sinks in any shape.

• ✅ 100% airtight seams — overlapping weld nuggets, zero pinhole leaks
• ✅ ~40–60 sec/bowl — high-speed continuous production cycle
• ✅ 95 stored programs — instant model changeover, zero setup time
• ✅ 360° R-corner welding — servo-driven A-axis handles all angles
• ✅ 30%+ energy savings — 2nd-gen MFDC vs. conventional AC power
• ✅ CE/CCC/ISO certified — proven reliability since 2001

Two precision roller wheels apply controlled pressure and MFDC current along the sink seam, creating overlapping weld nuggets that form a continuous airtight seal. Unlike spot welding (discrete welds, potential leak points), roller seam welding produces one uninterrupted sealed seam — no pinholes, no rework, no post-weld sealing required.

Mitsubishi servo motors drive X-axis (table movement), Y-axis (vertical travel), and A-axis (360° rotation). Input coordinates and welding current — the machine executes the complete welding path autonomously. Up to 95 programs stored for instant switch between sink models.

Medium-frequency DC output ensures fast current rise, stable arc, and minimal spatter. Current control accuracy ±1% guarantees consistent weld quality. Three-phase balanced input protects your facility power grid.

Large copper flat table provides stable, uniform conductivity. Custom fixtures per sink model ensure precise positioning. X-axis travel ≥2,500mm accommodates oversized sinks.

Closed-loop water cooling on transformer, SCR, and electrodes enables extended production runs without overheating. Low maintenance, stable quality throughout.