Benefits Corrosion Resistant Coatings-www.kepu.net.cn

Computers-and-Technology The armoloy corrosion resistant coating is used to protect both metal and plastics molds, even though the continuous effects of hot metal injected into die-casting molds represent on the toughest wear problems. With even the hot work series of alloy steels (H-13) are not able to stand up continuously to the effects of the heating and cooling cycles demanded of the mold. With the addition of the use of mold releases can cause a build-up and a release of residue on the cavity surface to the point where the mold must be removed from the press and cleaned and then polished. The special corrosion coating improves the lasting qualities of the mold on both problems: heat checking and release build-up. The inherently hard armoloy surface is corrosion-resistant and lowers the coefficient of friction between the coated surface and other materials which can help to reduce galling and pick-up between sliding metal parts. The satiny-matte, micro-orange peel finish of the special coating it also tends to also prevent mold release drips and runs on the cavity surface. Polishing and grinding requirements prior to coating with these kinds of special coatings are the same as that with standard chrome plating. For thermo set materials, alkyds can cause considerable maintenance problems requiring periodic leaning of mold surfaces and recoating. The special coating reduces maintenance requirements and extends mold life up to ten times that of normal molds without the coating. With just standard chrome plating over the nitrided surfaces can best be described as sporadic. Another down fall is the adhesion is definitely a problem and the flash-plating is very liable to peel off. The coating can also solve this problem with a special cleaning technique that provides a secure bond to the nitrided surface. Automatic unscrewing molds for threaded closures have a wear and galling problem between the rotating core and stripper ring. Ideally these running surfaces would be lubricated, but this is not always possible due to the close proximity to the molding area. Tests indicate that the siding coefficient of friction when one surface is coated is reduced 20 percent and when both surfaces are coated, friction is reduced in excess of 40 percent compared to steel against steel contact. In addition, it can be used to protect working part surfaces on scrap grinders, grinder blades, cheek plates and rotors, improving part life up to two to three times that of uncoated parts while reducing common maintenance problems. Wet parts and runners from water-bath cooling set-ups may be put directly into a protected grinders without concern about discoloring the plastic due to rust of corrosion. Of course when using a grinder for wet material, some type of protective coating should be used on the scrap bin and grinder body as well. About the Author: 相关的主题文章:

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