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Four methods of cleaning mould repair

During the use of the cleaning mould, it is inevitable that there will be failure modes such as collapse, deformation, wear, and even breakage.When these problems occur in the cleaning mould, we need to repair the mould

1. The electric spark process uses the arc that is continuously fed between the welding wire and the workpiece as a heat source, and the gas shielded arc sprayed by the welding torch nozzle is used for welding.

2. Argon arc welding is a commonly used method and can be applied to most major metals, including carbon steel and alloy steel. MIG 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 in cleaning mould repair welding, but the welding heat has a large impact area and large welding points. The precision cleaning mould repair has been gradually replaced by laser welding.

3. The brush plating technology uses a special DC power supply device. The positive electrode of the power supply is connected to the plating pen as the anode during brush plating; the negative electrode of the power supply is connected to the workpiece as the cathode during brush plating. The plating pen usually uses high-purity fine graphite The block is used as the anode material, and the graphite block is wrapped with cotton and wear-resistant polyester-cotton sleeve. When working, the power supply component is adjusted to the appropriate voltage, and the plating pen is saturated with the plating solution at a certain relative movement speed at the part of the surface of the workpiece being 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 coating, which is to obtain the required uniform deposition layer on the working surface of the repaired plastic cleaning mould cavity.

4. Laser welding is welding using a laser beam as a heat source by focusing on a high-power coherent monochromatic photon stream. 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, but the disadvantage is that the penetrating power is not as strong as electron beam welding. During laser welding, the energy control can be carried out, so the welding of precision devices can be realized. It can be applied to many metals, especially can solve the welding of some difficult-to-weld metals and dissimilar metals. It has been widely used in the repair of cleaning moulds.

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