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Laser welding for mold repair

In 2009 we added a further service to our offer: injection mold laser welding. It is an innovative system that allows modifications and refurbishing on already-existing molds without overheating the part or creating damage, distortions or tempering which cause loss of characteristics.

Laser welding is typically used to:

  • Build up damaged or worn up surfaces
  • Fill in small voids
  • fix cracks or mistakes
  • Accommodate engineering changes
  • Repair parting lines

The welding process allows us to assemble many materials such as steel, bronze, copper, aluminum and titanium alloys, with a hardness of up to 60HRC in order to meet all customers’ demands.


Do you need mold repair?

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Carrying out laser welding for molds

The most common way to repair a mold is laser welding. As a matter of fact, this process can restore the mold to its original and optimal condition by eliminating or sensibly reducing the problems that can arise, instead, with traditional welding. That is, laser welding can increase mold life while improving the whole manufacturing process.

Laser welding for mold repair is usually carried out through four gradual steps:

1. Damage analysis to determine the damage degree

2. Defects inspections to find the source of the damage

3. Removal of the damaged material to restore the mold to a like-new condition

4. Injection mold laser welding - A filler rod is usually placed between the worn or the damaged surface and the laser beam. The latter fuses the filler rod with the base material and repairs the area (a microscope must be used to target the weld point, while a filler rod fills in voids)



The benefits of injection mold laser welding

There are several reasons why we have chosen laser welding for injection mold repair. One of the most important ones lies in the fact that laser mold welding is way cheaper and faster than making a brand-new mold.

Other reasons regard the advantages of laser welding for mold repair over conventional TIG and micro-TIG welding:

  • It offers higher return on investment as it reduces rework and finishing costs
  • It offers a high degree of heat localization and controllability, which makes it the ideal choice for repairing complex molds too such as the custom-made ones used in the design field
  • It makes the entire mold remain cool to the touch, preserving its original shape
  • The sink of the base material that surrounds the welded area is remarkably reduced as the quantity of metal drawn into the melt pool is minimum
  • Laser welding for molds also reduces the amount of finishing, machining and handwork required
  • It can be used to repair a great variety of materials, including non-ferrous ones such as copper and aluminum which do not stand micro-TIG well


Do you need to repair molds?

Contact us for more information


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