A mold is a tool used to shape objects. This tool is composed of various parts, and different molds are composed of different parts.
It primarily achieves the shaping of objects by altering the physical state of the material being molded. In blanking, forming stamping, die forging, cold heading, extrusion, powder metallurgy pressing, pressure casting, and compression or injection molding of engineering plastics, rubber, ceramics, and other products, it is used as a tool to shape blanks into parts with specific shapes and dimensions under external force.
Mold repair requires professionally trained and qualified mold repair technicians. During repair, technicians must be familiar with mold technical standards. For example, die-casting molds are very expensive and specialized precision machinery, requiring a high degree of expertise. This demands not only excellent skills and meticulous work ethic from the mold repair technician, but also a responsible and conscientious attitude. Therefore, we will explain some important points regarding mold repair below.
1, The entire process involves cleaning all metal parts and accumulated dirt from the mold to reveal its original appearance.
2, Referring to the last die-cast product sent for repair along with the mold, carefully inspect the mold for any problems. Check for scratches, sticking, crushing, or chipping; bent or broken small cores; inaccurate insertion and positioning of movable cores; broken ejector pins or changes in ejector pin length; inaccurate positioning of inserts; and loose fastening bolts. Determine whether to repair or replace the mold based on the extent of the damage.
3, For minor scratches such as cavity collapse, cracks, and chipping that cause minor damage to castings, local welding repairs can be performed. Welding repairs must be strictly performed according to the welding repair process; otherwise, it will significantly reduce the lifespan of the mold. Smaller molded parts will experience more severe damage from these defects or even mold failure.
4, For larger molded parts with severe surface collapse, cracks, or chipping, local welding repair can be performed. Welding repair must be strictly performed according to the welding process; otherwise, it will significantly reduce the lifespan of the mold. Smaller molded parts will experience more severe problems or mold damage.
5, Sliding parts such as core-pulling mechanisms and guide devices should be thoroughly cleaned, carefully inspected, and repaired. Re-lubricate with high-temperature grease before reassembly.
6, If hydraulic core pulling is used, the hydraulic system and mold should be repaired simultaneously. Special attention should be paid to cleanliness during hydraulic system repairs to prevent contamination, otherwise the entire die-casting machine’s hydraulic system will be contaminated.
7, When a mold malfunctions or is damaged during production, a repair plan should be determined based on the specific circumstances. If necessary, comprehensive repairs should be carried out using the methods described above.
8, After maintenance and repair, apply rust prevention treatment to the molding surface, parting surface, and mounting surface of the mold. Close and fix the mold, and place it on the pad according to the installation direction of the mold on the machine. Place the mold accessories together with the mold.
