Choosing the Right System for Your Operation

Whether you choose micro TIG or laser welding, bringing mold repair in-house delivers the same core advantages: lower operational expenses, faster turnaround, and complete control over the process. Rather than sending molds out to an external service provider and waiting several days for their return, in-house welding allows your team to perform repairs the same day — keeping production on schedule and costs under control. Owning the process means your team develops expertise, maintains quality standards, and eliminates dependence on outside vendors.

Both technologies are well-suited for repairing defects on plastic injection molds, as well as supporting mold reengineering — modifying or redesigning existing mold geometry to improve part quality or extend mold life. The right choice between them comes down to your operation’s specific repair volume, mold complexity, and budget. Here is a straightforward breakdown to help you decide.

Side by Side Comparison

Attribute
Micro TIG Welding
Laser Welding
Speed
Up to 3 welds/sec. Heat buildup during extended use may require brief cooling pauses, making it better suited to moderate repair volumes.
Up to 10 welds/sec. Minimal heat input means no cooling pauses, making it ideal for high-volume mold repair environments.
Program Settings & CNC control
While power settings can be stored, the welding path is fully manual. The TIG electrode is held and guided by the operator’s hand.
Programmable laser path settings allow the welding head to follow precise, repeatable routes. Motorized X, Y, and Z axis control improves both accuracy and speed. Software-assisted tracked routes can weld circles, lines, and complex geometries automatically.
Mobility
Highly portable. The compact units can be brought to the mold and used directly at the press or on the shop floor.
Laser welders are usually kept in a dedicated welding area, and mold parts are brought to the laser welder for repair.
Weld Strength
Produces strong, reliable welds that withstand the pressures and working conditions of the molding process. Heat is concentrated at the weld spot, minimizing distortion to surrounding steel.
Produces equivalent weld strength. Minimal heat-affected zone offers additional protection for hardened tool steels and tight-tolerance surfaces.
User Friendliness
Easy to learn, especially for operators with existing TIG welding experience. Pre-programmed power settings reduce the guesswork
Also easy to learn but requires more time to master due to a broader range of options — including programmable path settings, pulse shaping, and multiple power controls. Once proficient, operators benefit from highly consistent and repeatable results.
Budget
Lower capital investment. Micro TIG welders are typically priced around $15,000, making them accessible for most shop budgets.
Larger capital investment. Laser welding systems generally range from $100,000 to $200,000, suited for operations where speed, precision, and volume justify the cost.
Consumables & Maintenance
Requires replacement electrodes, argon gas, and periodic electrode sharpening. Consumable costs are low and replacement parts are readily available.
Fiber laser models are maintenance-free with no consumable parts needed. YAG models use flash lamps that require periodic replacement. Internet connectivity enables remote service management.

Which System Is Best For You?

  • Choose Micro Tig if you:

    • Need portability for in-press or on floor repairs without removing the mold

    • Handle a lower to moderate volume of mold repairs

    • Want a lower initial equipment investment — micro TIG welders are typically priced around $15,000

  • Choose Laser Welding if you:

    • Repair a high volume of molds and need maximum throughput

    • Work on precision molds with fine features, intricate parting lines, or complex geometries

    • Need programmed path settings and motorized axis control for consistent, repeatable results

In most cases, the laser welder delivers the greatest overall benefit for plastic injection mold repair. Its speed, precision, and semi-automated programming capabilities make it the superior choice for shops looking to maximize throughput and consistency. However, for operations that do not yet have the budget to invest in a laser welding system, a micro TIG welder is an excellent alternative — producing very similar results at a fraction of the cost.

Explore Our Range of Welders

Not sure where to start? We carry a range of micro TIG and laser welding systems built for industrial applications — take a look at what we offer and find the best welding solution for your operations.

Micro Tig Welders

Our micro TIG welders are designed for the precision demands of industrial work — from mold repair and tooling restoration to fine metalwork requiring tight control and repeatability.

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Industrial Laser Welders

Our industrial laser welders are crafted by Sisma, a renowned Italian company known for delivering best-in-class laser technology. These systems provide unmatched precision and efficiency for welding and mold repair tasks.

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Frequently Asked Questions

What is the difference between micro TIG welding and laser welding for mold repair?

Both technologies are used to repair plastic injection molds by adding material to worn, damaged, or modified areas. The primary differences are speed, automation, portability, and cost. Micro TIG welders are portable and cost-effective, while laser welders offer faster welding speeds, greater precision, and programmable weld paths for high-volume applications.

Is laser welding better than micro TIG welding?

It depends on your application. Laser welding is generally the preferred choice for shops that perform frequent mold repairs, work with complex geometries, or require maximum precision and repeatability. Micro TIG welding can produce comparable repair quality at a significantly lower equipment cost, making it an excellent option for lower-volume operations.

Can micro TIG welding repair plastic injection molds effectively?

Yes. Modern micro TIG welders are specifically designed for precision mold repair and can produce strong, reliable welds with minimal heat distortion. They are commonly used to repair parting lines, damaged edges, worn surfaces, and other mold defects.

What types of mold repairs can be performed with laser welding?

Laser welding is commonly used for repairing worn mold surfaces, damaged corners, chipped edges, parting lines, vent areas, and fine mold details. It is also widely used for mold modifications and reengineering projects that require precise material addition.

Does laser welding create stronger welds than micro TIG welding?

No. When properly performed, both technologies produce welds that are strong enough to withstand the pressures and operating conditions of plastic injection molding. The main advantage of laser welding is its smaller heat-affected zone and greater precision, not increased weld strength.

How much does a micro TIG welder cost?

Micro TIG welders typically start around $15,000, making them an affordable entry point for shops looking to bring mold repair in-house and reduce outsourcing costs.

How much does a laser welding system cost?

Laser welding systems for mold repair generally range from $100,000 to $200,000, depending on features such as power output, axis control, software capabilities, and automation options.

Can mold repairs be performed without removing the mold from the press?

In many cases, yes. One of the biggest advantages of micro TIG welding is portability. Compact systems can often be brought directly to the press or production floor, allowing repairs to be completed without moving the mold to a dedicated repair station.

Which welding system is best for high-volume mold repair?

Laser welding is typically the best choice for high-volume repair environments. Its faster welding speeds, minimal heat buildup, and programmable weld paths allow operators to complete repairs more quickly and consistently than manual welding methods.

Is bringing mold repair in-house worth the investment?

For many molders, yes. In-house repair capabilities reduce downtime, eliminate outsourcing delays, lower long-term repair costs, and give teams greater control over quality and scheduling. The return on investment often comes from reduced production interruptions and faster mold turnaround times.