Laser welding uses a concentrated beam of energy to melt and fuse material with micron-level control. Unlike arc or TIG welding, the laser process creates minimal heat-affected zones (HAZ), ensuring precise repairs with little distortion.

Key Process Benefits:

• Non-contact, pinpoint accurate welding
• Controlled material deposition
• No filler wire required for micro-scale repairs
• High aspect ratio welds with minimal post-processing

• Extend Mould Lifespan Restore critical features and avoid full replacements.
• Improve Part Quality Consistent and accurate repairs reduce defect rates.
• Reduce Downtime Faster turnarounds mean fewer production stoppages.
• Lower Cost of Ownership Fewer replacements, consumables, and reworks.
• Sustainable Repair Method Eliminates waste and supports lean manufacturing goals.

Advantages of Laser Welding in Mould Repair

• High Precision Repair Repairs fine details without altering surrounding structures or surfaces. Suitable for micro-cracks, pin holes, worn edges, and surface damage.
• Minimal Thermal Distortion The small, focused beam limits heat propagation, reducing the risk of material warping, grain structure change, or softening.
• Versatility Across Materials Capable of welding tool steels, aluminium alloys, stainless steel, beryllium copper, and more.
• Time-Efficient Significantly faster than conventional repair methods, reducing lead times and increasing machine uptime.
• Repeatable Quality Digital controls ensure every repair is performed consistently, batch after batch, operator after operator.

Plastic Injection Moulds

Repair gate areas, edges, and surface defects with minimal dimensional change.

Die Casting Moulds

Restore heat-affected zones, cracks, and erosion without affecting base structure.

Forging and Stamping Tools

Rebuild contact zones and impact surfaces for longer service life.

Automotive Moulds

Support high-precision tooling in engine components, lighting, and sensor moulds.

Consumer Electronics

Maintain mould fidelity for precise casing and micro-feature production.

United Spectrum Instruments is the authorised distributor of Sigma Laser Gmbh (Germany)  in India, providing advanced Laser Welding Machines for Mould Repair, designed for high-precision, low-heat material joining. Backed by extensive experience and proven quality control, our systems deliver repeatable accuracy, reliable performance, and full support for integration into industrial workflows.

Why Choose Us?

• Decades of laser application experience
• Factory-tested systems tailored for Indian industries
• On-site training and lifetime customer support