To optimize the durability of the region around the mouth spray in mold, should use flexible steel (steel work in hot mode, for example DIN 12343), with about 48-50 HRC hardness. Avoid hardening by seepage of nitrogen or Chrome. The polished and rounded the corner edges are done to reduce the export application inside. Where the nozzle is easy machining being brittle and need to be noted.The type of nozzle shape pairing can replace help use the more flexible nozzle. Can change the shape of the mouth spray without having to change the entire top of the spray nozzle.
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