There are many varieties of plastic parts that exhibit defects, and the reasons are also complex, including mold related reasons and technical conditions. The two are usually only combined. Before repairing the mold, a detailed analysis and research should be conducted based on the actual situation of the defects that occur in the plastic part, to identify the reasons for the defects in the plastic part, and propose compensation methods. Due to the simple modification of the forming conditions, the usual approach is to first modify the forming conditions. When the modification of the forming conditions cannot solve the problem, the repair of the mold is considered.
Molds have extremely important effects in modern industry, and their quality directly determines the quality of products. Improve the service life and accuracy of molds. Reducing the manufacturing cycle of molds is a technical issue that many companies urgently need to address, but failure methods such as corner collapse, deformation, wear, and even breakage often occur during the use of molds.
There are many methods for correcting molds, such as electric discharge technology, argon arc welding correction, laser surfacing technology, and brush plating method. The argon arc welding correction uses the arc burned between the continuously fed welding wire and the workpiece as the heat source, and the gas shielded arc sprayed from the welding torch nozzle is used for welding. At that time, argon arc welding was a commonly used method that could be applied to most primary metals, including carbon steel and alloy steel. Dissolved electrode inert gas welding is suitable for stainless steel, aluminum, magnesium, copper, titanium, zirconium and nickel alloys. Due to the low quotation, it is widely used for mold correction welding. However, due to the shortcomings of large welding heat affected area, large welding spots and so on, it has gradually been replaced by laser welding machine in precision mold repair at that time. Brush plating correction: Brush plating technology uses a specialized DC power supply device, with the positive pole of the power supply connected to a 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 blocks as the anode material, and the graphite blocks are wrapped with cotton and wear-resistant polyester cotton sleeves.
At that time, it was widely used for correcting molds. The laser welding machine uses the laser beam which is assembled by high-power coherent monochromatic photon flow as the heat source for welding. This welding method usually includes continuous power Laser beam welding and Pulsed power Laser beam welding. Laser welding machine? The advantage is that it does not need to be carried out in a vacuum, while the disadvantage is that the penetration force is not as strong as electron beam welding. Laser beam welding can carry out accurate energy control, so it can complete the welding of precision devices. It can be used for welding many metals, especially for processing some difficult to weld metals and dissimilar metals. At that time, it was widely used for correcting molds.
