According to the survey, due to mold raw materials and energy prices rose sharply and other reasons, in 2014 the mold industry products profit decline. In order to survive and develop, many enterprises have adopted the material switching as a major step in the development of transformation measures. It is understood that many companies launched a graphite EDM discharge material, in the mold production plays an extremely important role.
Compared with the traditional copper mold, the graphite material has the advantages of high precision and good surface effect, especially in the precision, complex, thin-walled, high-hard material mold cavity processing has a greater advantage.
Compared with copper, graphite material has the advantages of less consumption, fast discharge, light weight and small thermal expansion coefficient. Therefore, the replacement of copper electrode becomes the mainstream of discharge machining material.
In contrast, EDM Graphite Electrodes materials have the following six advantages:
Graphite discharge is 2-3 times faster than copper, the material is not easy to deformation, in the thin bar electrode processing on the obvious advantages of copper softening point of about 1000 degrees, easily due to heat and deformation, graphite sublimation temperature of 3650 degrees, In contrast, the thermal expansion coefficient of graphite material is only 1/30 of copper.
Graphite density only copper 1/5, large electrode discharge processing, can effectively reduce the burden of machine tools (EDM), more suitable for large-scale mold applications.
Third, the loss is small
As the spark oil contains C atoms, in the discharge processing, the high temperature lead to the spark oil in the C atoms are decomposed, and in the EDM Graphite Electrodes surface to form a protective film to compensate for the loss of EDM Graphite Electrodess.
Copper electrode in the processing after the end of the need to manually remove the burr, and graphite processing without burrs, which not only saves a lot of cost and manpower, while easier to achieve automated production.
Five. Easy to polish
As the graphite cutting resistance is only 1/5 of copper, the operation is more easy to hand grinding and polishing.
Due to rising prices of copper in recent years, and now, all aspects of the same price of graphite is lower than the copper; the same volume of the same carbon under the universal, the price of graphite products lower than 30 percent to 30 percent, Prices are relatively stable, short-term price fluctuations are relatively small.
With the energy saving and processing efficiency increasingly become the focus of the manufacturing sector, EDM Graphite Electrodes material has its advantage will gradually replace the copper electrode in the EDM plays an important role.
Similarly, in the mold market increasingly competitive today, the use of advanced processing technology, the development of high-quality mold products, is the enterprise to win the market and the best way customers.