The surface treatment technology of mould spring and the matters needing attention
The mould is the main equipment of industrial production. The development of modern industrial products and the improvement of the technical level, to a large extent depend on the level of development of the mold industry. In recent years, the degree of automation to improve the rapid development of foreign mold. And many similar manufacturing situation, although China is a major producer of mold, but it is not a mold manufacturing powerhouse. This is the key to the success of the spring, which is matched with the mold. The surface treatment technology has a direct impact on the performance of the whole mold. To this end, HC surface treatment network Xiaobian collected information, here to share with you simple.
Color paint coating features a beautiful set
The spring surface using a variety of paint to make the recognition, such as lotus light yellow paint that reuse of light load; blue paint; Dutch red paint reuse said Brown paint; extremely heavy duty said;
Performance analysis: paint the spring supporting surface treatment, can shoot two hawks with one arrow use color to mark, various technical parameters, convenient industrial production operation, and the anticorrosion performance of spring surface can be better guaranteed.
At present, the successful use of the above-mentioned major manufacturers in foreign countries, especially in japan. In China, this is only a small number of manufacturers to visit, at present, some of the main technical requirements, such as the use of imported materials to reach the level of foreign countries, but the entire spring surface treatment effect is clearly a gap.
In general, the use of manual spray paint, the appearance of the flow will hang, leak spray, the combination is not good, rust. The limitations of their own technology caused a large number of products to take off paint rework.
Abroad is the use of electrophoretic paint, water soluble paint tank, the workpiece as a cathode, the application of a certain voltage and time, you can form a uniform thickness of the paint on all surfaces of the spring, and then can be cleaned and dried. Its appearance is clean, no particles, no threadbare phenomenon, the binding force is not easy to fall off, hardness is 3-4H, if the British company LVH polyurethane cathodic electrophoretic paint, the softness is quite good. The operating environment has no strong solvent taste, less air pollution, simple process of waste water treatment and discharge, as long as the resin of the PH electrophoretic paint is adjusted, and then the water is discharged.
Paint for spring paint layer
A. asphalt paint has good water resistance, moisture resistance, corrosion resistance, especially excellent acid resistance and good alkali resistance. But adhesion, mechanical strength, poor decoration.
B. phenolic paint phenolic paint is divided into two kinds of primer and finish, phenolic primer adhesion, rust resistance, but the film mechanical strength and gloss. Phenolic paint film is hard, shiny, but the weather resistance is poor, film yellowing.
C. alkyd paint alkyd paint film tough, strong adhesion, good mechanical properties, excellent gloss, good durability and has a certain oil resistance, insulation performance. The disadvantage is that the surface of fast drying and sticky time is long, easy to wrinkle, no water, no alkali.
D. epoxy paint epoxy paint strong adhesion, high hardness, good toughness and impact resistance, flex, and hard but not brittle, has excellent resistance to water, acid, alkali and many organic solvents, especially to alkali is more prominent. The disadvantage is that the surface of the powder fast, solvent selectivity. Water soluble epoxy paint for electrophoretic coating.
In general, the paint layer can be used alone, but also as a coloring agent after phosphating. Sometimes, some springs are divided according to their loads, and they are painted differently. Specific selection of types and grades of paint should be based on the working environment. If necessary, it shall be indicated in the spring pattern.
Spring surface finish
In recent years, the surface of the spring decoration (finishing) is also known by the spring designer.
The finishing process of the utility model is that the spring is directly arranged in a series of light decorative machines, such as an inclined centrifugal type or a spiral vibrating type, an eddy current type, etc., and an appropriate amount of abrasive material, grinding agent and water are added, and the finishing process is carried out. In general, the light is about 20~30min, and the specific lighting time depends on the shape of the spring and the quantity of the device. After the end of the light to take out the spring, and rinse with water, and then immersed in SM series of water film to replace the anti rust oil after a few minutes. At this time, the surface of the spring is attached with a layer of 5 m antirust oil film. This kind of processing method has greatly supported the traditional complex processes, such as degreasing, cleaning, pickling, hydrogen removal, etc..
At present, the use of light decoration (the whole) of the process of the spring are: oil pump nozzle plunger spring and injector pressure regulating spring; refrigerator compressor with supporting springs, etc.. The comparison between the performance of the light treatment and the conventional oxidation or the coating treatment of the spring, the performance (life) and corrosion resistance, and so on, do not need to be further tested, after practice, to make a more reliable conclusion.
Method for eliminating unqualified paint layer:
At present, some factories use oil paint layer, and then clean the surface with shot blasting, but the process of making considerable pollution, and easy to appear in the process of artificial fire.
The paint layer is coated with concentrated sulfuric acid, but the strong acid itself can cause hydrogen embrittlement.
Using KRT paint remover, with swelling method, paint stripping, not to hurt the spring base, simple operation, the method is relatively advanced, but the paint remover of goods may lead to rising costs, but if the reduction of scrap rate, the total cost would not rise.
Metal protective layer of spring
There are many kinds of metal protective layer, in terms of spring, it is usually used to obtain the metal protective layer. Plating protective layer
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