The current mold is the main process equipment for industrial production. The development of modern industrial products and the improvement of technical level largely depend on the development level of the mold industry.
The current mold is the main process equipment for industrial production. The development of modern industrial products and the improvement of technical level largely depend on the development level of the mold industry. Since the Second World War, the increase in automation has led to rapid development of foreign molds. Although my country is a big country in mold production, it is not a strong country in mold manufacturing. For springs that match the mold, this detail is also the key to achieving quality. Affect the performance of the entire mold.
The surface of the spring is identified by various paint layers. For example, light and small loads are represented by yellow paint; light loads are represented by blue paint; medium loads are represented by red paint; extremely heavy loads are represented by brown paint;
Performance analysis: A good paint layer to match the spring surface treatment can be described as two birds with one stone. The color is used to identify various technical parameters, which is convenient for industrial production and operation, and the anticorrosion performance of the spring surface can be better guaranteed.
At present, the main manufacturers that have successfully used the above methods are many foreign manufacturers, such as Japan Dongfa Company.
In China, only a small number of manufacturers have effectively visited. At present, it is mainly due to some fixed technical requirements, such as the use of imported materials to achieve foreign standards, but there is an obvious gap in the surface treatment effect of the entire spring.
Manual paint spraying is generally used in China, and the appearance will appear sagging, leaking, poor combination, and poor rust resistance. Due to its own process limitations, a large number of products have to be stripped and reworked.
The electrophoretic paint is used abroad. In the water-soluble paint tank, the workpiece is used as the cathode, and a certain voltage and time are applied to form a paint layer of uniform thickness on all surfaces of the spring, and then it can be cleaned and dried. The appearance is clean and bright, no particles, no bottoming phenomenon, good binding force, not easy to fall off, good hardness is 3-4H, if the British LVH company polyurethane cathode electrophoretic paint is used, its flexibility is quite good.
There is no strong solvent smell in the operating environment, less air pollution, and the wastewater treatment and discharge process is simple. Just adjust the resin of the PH sedimentation electrophoresis paint, and then discharge clean water.
The design process for a domestic manufacturer is: forming spring → shot peening → hanging tool → alkaline degreasing → double water washing → (micro acid 1% neutralization) phosphating → double water washing → double deionized water washing → cathode system polyurethane color Electrophoretic paint→Recycling→Double water washing→Assisting washing→Baking and curing→Under hanging tool.