"Mould has an extremely important role in modern industry. Its quality directly determines the quality of the product. Improving the service life and accuracy of the mold. Shortening the manufacturing cycle of the mold is a technical problem that many enterprises need to solve urgently, but in the process of using the mold There are often failure forms such as collapse, deformation, wear, and even breakage. "Luo Baihui, a mold expert, said that there are many ways to repair the mold, such as EDM process, argon arc welding repair, laser surfacing technology, and brush plating method.

Welding is performed by using an arc burning between the continuously fed welding wire and the workpiece as a heat source, and the arc is protected by the gas sprayed from the welding torch nozzle. At present, argon arc welding is a commonly used method and can be applied to most major metals, including carbon steel and alloy steel. Dissolved extremely inert gas shielded welding is suitable for stainless steel, aluminum, magnesium, copper, titanium, zirconium, and nickel alloys. Due to its low price, it is widely used for mold repair welding, but the shortcomings of large heat-affected area and large solder joints are currently in Precision mold repair has been gradually replaced by laser welding.

Brush plating technology uses a special DC power supply device. The positive pole of the power supply is connected to the plating pen as the anode during brush plating. The negative pole of the power supply is connected to the workpiece and used as the cathode during brush plating. The high-purity fine graphite block is usually used as the plating pen. Anode material, graphite block is covered with cotton and wear-resistant polyester-cotton sleeve. During operation, the power supply assembly is adjusted to a proper voltage, and the plating pen immersed in the plating solution is brought to a certain relative movement speed at the part contacted by the surface of the workpiece to be repaired. The metal ions in the plating solution diffuse to the workpiece under the action of the electric field force. On the surface, the electrons obtained on the surface are reduced to metal atoms, so that these metal atoms are deposited and crystallized to form a plating layer, that is, the required uniformly deposited layer is obtained on the working surface of the cavity of the plastic mold to be repaired.

Laser welding is a welding process that uses a high-power coherent monochrome photon stream to focus the laser beam as a heat source. This welding method usually has continuous power laser welding and pulse power laser welding. The advantage of laser welding is that it does not need to be performed in a vacuum. The disadvantage is that the penetration is not as strong as that of electron beam welding. During laser welding, precise energy control can be performed, so welding of precision components can be achieved. It can be applied to many metals, especially to solve the welding of some difficult-to-weld metals and dissimilar metals. It has been widely used in mold repair.

Light welding is a welding process that uses a high-power coherent monochrome photon stream to focus the laser beam as a heat source. This welding method usually has continuous power laser welding and pulse power laser welding. The advantage of laser welding is that it does not need to be performed in a vacuum. The disadvantage is that the penetration is not as strong as that of electron beam welding. During laser welding, precise energy control can be performed, so welding of precision components can be achieved. It can be used for many metals, especially it can solve the welding of some difficult and dissimilar metals. It has been widely used in mold repair.