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Aluminum manufacturers surface tear lines of its causes and elimination methods
aluminum manufacturers surface tear lines causes and elimination methods of surface crack defects of a aluminum manufacturers features: aluminum manufacturers present longitudinal surface fish Lin partition between repetitive lines, serious disconnect separation shaped directly. Aluminum manufacturers surface crack causes: ( A) Aluminum manufacturers extrusion coefficient is too large, extrusion temperature is too high, Rod, tube, die three temperature) , the extrusion speed too fast; （ 2) Unstable extrusion pressure, high and low, or multiple speed regulating speed difference between apparent, shift conversion processes fast; （ 3) Aluminum profile extrusion pressure on the head end ( Stamping) Too fast, the end run fast or slow down, dead zone of aluminum infiltration; （ 4) Of poor quality, burnt stick, big grain, loose. More than pressure ( V3 aluminum) A thin; （ 5) Extrusion die velocity than a serious imbalance between the design and manufacture is not reasonable. Aluminum manufacturers surface crack elimination method: ( A) Extrusion profiles can be placed in small machine production coefficient is too large, use appropriate extrusion ratio; Three temperature and extrusion must be strictly in accordance with the requirements of production process control, to adopt proper extrusion speed; （ 2) Smooth operator concentration, speed, pressure not higher or lower, shift when manual operation to cooperate; （ 3) Aluminum manufacturers stop printing front-end and back-end is dead zone volume or V3 ( Aluminum rod surface) Aluminum, impurities, the quality is poor, viscosity is not enough, so the profile extrusion head end speed will slow down; （ 4) Aluminum rod to surface clean without oil, the internal organization to amount to mark, pressure than normal leave ( 5%) ； （ 5) Extrusion die designers to design and manufacture of uniform velocity of qualified mold.