Zinc die casting is a process of injecting molten zinc into a mold to produce complex and precise metal parts. It is widely used in various industries due to its high strength, corrosion resistance, and cost-effectiveness.

Common fault analysis and solution of mold manufacturing / stamping die

Stamping mold, is in the cold stamping processing, the material processing into parts (or semi-finished products) of a special process equipment, known as cold stamping mold (commonly known as cold punching mold). Stamping, is a pressure processing method to apply pressure to the material at room temperature to produce separation or plastic deformation, so as to obtain the desired parts.

Stamping is one of the practical processes of large batch parts molding production. In the process of stamping production, the mold has the most problems, and it is the most important factor in the whole stamping production factor. It directly affects the production efficiency and cost. Affect the delivery cycle of the product. Mold problems mainly focus on the mold damage, product quality defects and mold blade grinding, they have long troubled the industry production. Only these key points are handled correctly. Stamping production can be conducted smoothly.

Mold failure is the most likely problem in stamping production, often causing production suspension, affecting the product production cycle. Therefore, it is necessary to find the cause of the mold fault as soon as possible and reasonable maintenance.

1, mold damage mold damage refers to the mold cracking, breaking, open open, etc., to deal with the mold damage problem, must be from the mold design, manufacturing process and mold use to find the reason. First of all, check whether the manufacturing material of the mold is appropriate and the corresponding hot burial process is reasonable. Generally, the heat treatment process of the mold material has a great influence on it. If the quenching temperature of the mold is too high, the quenching method and time are unreasonable, and the number of tempering and temperature, elbow selection is improper, the mold will be damaged after entering the stamping production. The size or depth of the drop hole design is not enough, easy to make the slot block, causing damage to the drop plate. The spring force design is too small or the high set, will make the spring fracture, drop plate tilt. Cause overlap and damage the parts. Improper fixing of the punch or insufficient screw strength. Can cause a punch to fall or break. When the mold is used, the position and direction of the parts are not installed correctly or the bolts are not fastened properly. Working height adjustment is too low, and the guide column lubrication is insufficient. Feed equipment failure, abnormal press, etc., will cause damage to the mold. If there is a foreign body into the mold, production parts overlap, waste blockage and other conditions are not handled in time, continue processing and production, it is easy to damage the mold drop board, punch, lower template and guide column.

2. In the process of stamping the mold, once the mold is not flexible, or even stuck, we must immediately stop production, find out the cause of the mold, and eliminate the fault. Otherwise, the fault will be expanded, causing damage to the mold. The main reasons for the card mold are: poor mold guidance, tilt. Or foreign matter between the templates; the strength is not to design or uneven stress. Causes mold deformation, such as the hardness and thickness of mold base and formwork are too small, which are easy to be deformed by external force; the mold position is not installed, and the positioning error of upper and lower die is super poor. Or the accuracy of the press is too poor, so that the mold interference; the strength of the punch is too close, so that the lateral force of the die is unbalanced. At this time, the punch strength should be improved to enhance the guide and protection of the unloading board.

3, mold damage and repair stamping production mold cost is high. Usually the mold cost accounts for 1 / 5-1 / 4 of the total cost of the parts. This is because, in addition to the mold manufacturing difficulty, high cost. The mold repair and blade grinding maintenance costs are also high, and the original cost of the mold only accounts for about 40% of the whole mold cost. Therefore, timely maintenance of the mold, to prevent the mold damage, can greatly reduce the cost of stamping production mold.

Generally speaking, after the mold is damaged, there is also a choice of maintenance and scrapping. Non-natural wear failure of stamping die, such as failure of non-critical parts. And small convex mold fracture, convex mold upsetting, concave template cracking, cutting edge cracking and other faults. Most of them can be completely restored to the normal state and re-put into stamping production. but. When the key parts of the mold are seriously damaged, sometimes convex and concave mold are damaged at the same time. The one-time repair cost exceeds 70% of the original cost of the mold, or the life of the mold is close. The significance of maintenance is not big, at this time, we should consider scrapped mold: in addition to large mold, complex continuous mold. When the mold maintenance technology is too complex and the cost of mold repair is too large, the difficulty will inevitably make the maintenance cycle too long, seriously affecting the normal production of stamping, we should choose to scrap in advance and rebuild the mold.

Stamping production efficiency and cost are highly dependent on the mold. In the production process of the mold fault, should be specific problem specific analysis, develop the correct maintenance plan. Timely solve the mold damage, mold card, blade grinding and product quality defects. To deal with the relationship between mold maintenance and scrap, to reduce the production of mold repair time, shorten the production cycle, to ensure the normal operation of stamping production.

zinc die casting