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Precision mold repair has been gradually replaced by laser welding

2016/10/7 19:25:32

Although it is in the selected molding materials, molding equipment, in the expected process conditions for mold design, but people's understanding is often imperfect, it must be completed in the mold after the test, try to shape the workpiece How is the quality. Found that after all, to eliminate the wrong mode of repair.

Plastic parts of the phenomenon of many types of bad phenomenon, the reasons are very complex, there are mold reasons, there are reasons for the process conditions, the two are often only together. Before repairing the mold, it should be based on the plastic parts of the adverse phenomena of the actual situation, a detailed analysis of the study, identify the cause of defects caused by plastic parts after the remedial approach. Because the molding conditions are easy to change, so the general practice is to change the molding conditions, when changing the molding conditions can not solve the problem, only to consider repair mold.

"Mold in modern industry has an extremely important role, its quality directly determines the quality of the product.Improve the mold life and accuracy.To shorten the mold manufacturing cycle, many enterprises need to solve the technical problems, but in the mold use process Often appear collapse angle, deformation, wear, and even broken and other failure forms. "Mold expert Luo Baihui said, repair mold a lot of methods, such as EDM, welding, laser welding technology, brush plating method.

TIG welding repair

The use of continuous feeding between the welding wire and the workpiece between the arc as a heat source, the torch nozzle spray from the gas to protect the arc welding. At present, argon arc welding is a commonly used method, can be applied to most of the major metals, including carbon steel, alloy steel. Solderable inert gas shielded welding is suitable for stainless steel, aluminum, magnesium, copper, titanium, zirconium and nickel alloy, because of the low price, is widely used in mold repair welding, but the welding heat affected area, solder joints and other shortcomings, Precision mold repair has been gradually replaced by laser welding.

Brush plating repair

Brush plating technology is the use of a dedicated DC power supply equipment, the power of the positive pole connected to the pen, as the brush when the anode; the negative power of the workpiece, as the brush when the cathode, the pen is usually made of high purity graphite Anode material, graphite block wrapped around the cotton and wear-resistant polyester and cotton sets. Work, the power supply components to adjust to the appropriate voltage, and so that the bath was filled with a certain relative speed of movement in the repair surface contact with the workpiece, the metal ions in the bath under the action of electric field force spread to the workpiece On the surface, electrons are reduced to metal atoms on the surface, so that these metal atoms are deposited to form a coating on the crystal, that is, to obtain the required uniform deposition layer on the working surface of the plastic mold cavity.

Laser surfacing repair

Laser welding is the use of high-power coherent monochromatic photon focusing made of laser beam as a heat source for welding. This welding method usually has continuous power laser welding and pulsed power laser welding. Laser welding advantage is not required in a vacuum, the drawback is that penetration is not as strong as electron beam welding. Laser welding can be carried out when the precise energy control, which can achieve the welding of precision devices. It can be applied to many metals, in particular, can solve some difficult to weld metal and dissimilar metal welding. Currently widely used for mold repair.

Optical welding is the use of high-power coherent monochromatic photon focusing made of laser beam as a heat source for welding. This welding method usually has continuous power laser welding and pulsed power laser welding. Laser welding advantage is not required in a vacuum, the drawback is that penetration is not as strong as electron beam welding. Laser welding can be carried out when the precise energy control, which can achieve the welding of precision devices. It can be used for many metals, in particular, can solve some difficult to weld the metal and dissimilar metal welding. Currently widely used for mold repair.