Mold Welding Machine – Professional Solution for Precision Mold Repair
ZS Laser’s mold welding machine is a specialized fiber laser welding system developed specifically for precision mold repair. Unlike standard welding equipment, this machine is engineered to handle the delicate and complex structures of molds used in plastic injection, die casting, stamping, and other high-value tooling industries.

Mold Repair Welding Machine
During mold production and use, defects such as cracks, pores, sand holes, overcuts, and accidental damage are almost inevitable. Traditional welding methods can cause excessive heat input, deformation, or rough seams, which compromise the mold’s accuracy and lifespan. The mold welding machine solves these issues by offering stable, fine, and precise laser welding. It ensures smooth weld seams that restore mold performance without affecting its structure.
In modern manufacturing, where molds are a cornerstone of mass production, this equipment has become a critical tool for reducing downtime, cutting costs, and extending mold life.
Why Choose a Mold Welding Machine?
Conventional welding processes such as arc welding, TIG, or MIG are not suitable for mold repair. They generate large heat-affected zones, high thermal stress, and poor seam accuracy, often damaging expensive molds instead of repairing them.
The mold welding machine offers significant advantages:
Precision repair:
The laser beam is focused into a tiny spot, allowing for micro-welding on cracks or pores as small as 0.1 mm.
Minimal thermal distortion:
With localized heating, only the defect area is melted, preventing large-scale deformation.
Superior weld appearance:
Weld seams are smooth, strong, and often require no post-processing.
Cost saving and efficiency:
Instead of scrapping or replacing molds, manufacturers can repair them quickly, saving both time and material costs.
Extended mold life: By restoring mold surfaces and defects, production can continue with consistent product quality.
This is why industries that rely heavily on high-value molds increasingly choose mold welding machines as their go-to repair solution.
Key Features & Benefits
Professional mold repair capability
Designed specifically for mold maintenance, this machine effectively repairs micro-cracks, hidden damages, gas holes, sand holes, wear, and accidental surface defects.
High-precision laser welding
Equipped with a specialized mold laser welding head and microscope monitor, operators can precisely control the welding process under magnification, ensuring accuracy down to microscopic levels.
Stable performance with branded components
The standard configuration includes a domestic top brand 1500W fiber laser source, XY synchronized motor, and intelligent laser control system. These components ensure reliability, long service life, and stable welding quality.
Smart control system
The intelligent laser control system allows fine adjustment of welding parameters such as pulse width, frequency, and energy, making it suitable for different mold materials and defect types.
Efficient cooling system
Integrated with an industrial-grade water chiller, the system maintains stable operating temperatures, protecting both the laser source and welding head for continuous, long-term use.
Compact and customizable design
The standard machine size (670 × 440 × 610 mm) is compact, saving workshop space. Customization options are available for specific customer requirements.
Expert training and guidance
ZS LASER provides technical training and professional guidance, ensuring your team can operate the equipment effectively and safely.

Mold welding machine microscope monitor
Recommended Operation
Because mold repair is a high-precision process, ZS LASER strongly recommends assigning dedicated operators to this machine. A specialized operator can:
Ensure correct parameter settings for different mold materials (such as tool steel, stainless steel, or aluminum alloys).
Monitor weld seams under the microscope for quality control.
Perform regular machine maintenance to keep the system at its peak performance.
By implementing specialized training and a dedicated position for mold welding, you can maximize the performance of the machine and achieve long-term reliability.
Technical Specifications
Parameter | Details |
Laser Source | 1500W Fiber Laser (domestic top brand) |
Welding Head | Specialized mold laser welding head |
Monitoring | Microscope monitor |
Cooling System | Industrial water chiller |
Motion System | XY synchronized motor |
Control System | Intelligent laser control |
Machine Size | 670 × 440 × 610 mm |
Configuration | Customizable upon request |
This is the standard configuration. When purchasing, please contact us to select the appropriate accessories according to your specific application and customize the configuration that suits you.
Applications
The mold welding machine is widely applied across industries that rely on high-precision molds made from materials such as stainless steel, copper, aluminum, and carbon steel. These molds are essential for mass production, yet often suffer from defects like cracks, pores, and surface wear during manufacturing or use. The mold welding machine provides a reliable, precise, and cost-effective repair solution.
Die-Casting Mold Repair (Aluminum, Magnesium, Zinc Alloys)
Die-casting molds are subjected to extreme heat and pressure, which often leads to thermal cracks, gas pores, or impact damage. The mold welding machine restores these molds with minimal thermal deformation, extending their service life.
Plastic Injection Mold Repair (Stainless Steel, Tool Steel)
Plastic injection molds require high surface precision and smoothness. Laser welding can effectively repair edge wear, micro-cracks, or overcuts, ensuring consistent part quality and reducing scrap rates.
Precision Stamping Mold Maintenance (Carbon Steel, Alloy Steels)
Stamping molds for sheet metal components often experience edge chipping, deformation, or surface wear. With localized, high-precision welding, these molds can be restored to maintain dimensional accuracy and prolong tool life.
Copper and Aluminum Mold Repair (Electronics & Automotive Sectors)
Molds made of copper or aluminum are widely used for electrical connectors, heat sinks, housings, and lightweight automotive parts. Laser welding allows precise, low-heat repair that preserves conductivity and material strength.
Automotive Industry
Automotive production heavily relies on molds for body panels, interiors, and precision parts. The mold welding machine helps manufacturers repair high-value molds quickly, avoiding costly downtime and mold replacement.
Aerospace Industry
Aerospace components demand molds with extreme accuracy and durability. The machine’s ability to repair high-strength alloy steel molds ensures reliable performance in producing turbine blades, structural parts, and composite components.
Electronics & Semiconductor Industry
For micro-molds used in connectors, casings, and semiconductor components, laser welding provides the fine precision required to repair delicate structures without damaging surrounding features.
By enabling professional and efficient repair of molds across different industries and materials, the mold welding machine significantly reduces mold replacement costs, minimizes downtime, and ensures uninterrupted production quality.
Why Choose ZS LASER?
Mold Welding Solutions Experts: Over a decade of experience in laser welding technology and mold-specific applications.
Competitive Manufacturer Pricing: Factory direct sales ensure customers receive the best value without middlemen.
Branded Components, Reliable Quality: All accessories are sourced from top domestic brands, partnered with leading component suppliers to ensure stable performance.
Customization Options: Our dedicated R&D and design team can configure machines based on specific mold repair needs to meet your customized requirements.
After-Sales Support and Spare Parts: Our dedicated service team ensures long-term reliability and customer confidence, providing timely online assistance to address any operational issues.
Included Professional Training: ZS LASER will adjust the machine to the appropriate parameters before shipment and provide instructional videos to ensure operators can quickly get up and running.
Looking for a reliable mold welding machine to repair and extend the life of your valuable molds?
Contact us today to get tailored solutions, professional guidance, and factory-direct pricing.