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Goldplin Laser's Mold Laser Welding Machines are precision-engineered tools designed specifically for the repair, modification, and restoration of injection molds, die-casting dies, stamping tools, and precision tooling. Using a high-peak-power pulsed Nd:YAG laser, our mold welding machines deliver concentrated energy to extremely small areas — enabling toolroom technicians to build up worn surfaces, fill pitting and cracks, add missing material, and modify mold geometry with accuracy that conventional TIG welding simply cannot achieve.
Our mold laser welding machines are available in 200W, 300W, and 600W configurations to handle everything from fine jewelry mold repair to heavy industrial die restoration. The microscope-assisted viewing system with adjustable magnification allows operators to place welds precisely where needed — even in deep cavities and complex geometries that are inaccessible to conventional welding equipment.
The pulsed laser beam is focused through a microscope optical system onto the weld area, delivering short high-energy pulses that melt the filler wire and base material together. Because the energy is concentrated in an extremely small spot and delivered in microsecond pulses, the heat-affected zone remains minimal. The surrounding mold material stays at near-ambient temperature, eliminating thermal distortion, stress cracking, and the need for pre-heating or post-weld heat treatment in most applications.
Mold laser welding machines are used extensively in plastic injection mold repair shops for filling sink marks, parting line damage, ejector pin holes, and surface porosity. Tool and die shops use laser welding for repairing worn cutting edges on stamping dies and restoring dimensional accuracy on precision gauges and fixtures. The die-casting industry relies on laser mold welding for repairing thermal fatigue cracks and erosion damage on aluminum and zinc die-casting dies. Rubber mold manufacturers use laser welding to repair flash grooves and venting features without disturbing the critical mold surface finish.
Conventional TIG welding on molds requires pre-heating the entire mold to prevent cracking, generates a large heat-affected zone that can distort critical dimensions, and often requires post-weld stress relieving and extensive re-machining. Laser mold welding eliminates all of these steps. Welds can be placed directly on hardened tool steel, stainless steel, beryllium copper, and aluminum without pre-heating. The minimal heat input means the mold can often be returned to production the same day, and weld beads as small as 0.2mm in diameter can be placed with the precision of a surgical instrument.
Goldplin mold laser welding machines are built with high-reliability Nd:YAG laser sources, precision optical systems, and ergonomic workstations designed for extended toolroom use. The adjustable pulse width, frequency, and energy settings give operators full control over weld bead size, penetration depth, and heat input. A built-in argon gas shielding system protects the weld pool from oxidation, ensuring clean, porosity-free welds on all tool steel grades. Each machine comes with complete installation, operator training, and a range of filler wire materials suitable for common mold and die steels.
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