Magnesium alloy semi-continuous casting produstion line
The utility model relates to a semi continuous casting of magnesium alloy, which is used for automatically transferring the liquid magnesium alloy liquid to the pre heating liquid tank. The liquid inside fluid through the valve to control the liquid magnesium into uniform ooling (crystal izer surounding into the circulating water), while casting machine hydraulic traction device uniform moving downward, the liquid magnesium is a solid rod form downward traction. In the process, the outer circumferentiall part of the spray olling rod is suplied by the water pump of the casting machine, so that the center of the bllet can be solidified rapidly to achieve the purpose of producing the magnesium rod blank. The difference between semi continuous casting and low pressure or normal pressure casting is that the malten metal can be rapidly solidified by the cooling water around the crystal zer. In order to achieve the purpose of compact crstalline structure, no porosity, shrinkage and other casting defects. Because of its excellent properties, semi continuous casting billets are mostly used as raw materials or sacnificiall anodes for extrusion and olling profiles.
Commonly used semicontinuous casting machine is divided into hydra lic casting machine and screw dhive type casting machine.between the two types. The hydraulic casting machine cost is high, can achieve precise control. And screw type casting machine low cost, the drive screw parts because of the vulinerabilty to change regularly, slightly lower control precision, but can satisfy completely the req irements of the casting bar.
Operating procedures: start the hydraulic station or screw brake, according to the technological requirements set casting parameters (casting speed, length, cooling water flow rate, etc.), remove the slide car, the dummy head start lifting platform quickly rose to about 200 mm + automatically stop, the dummy head use compressed air to blow dly, the car moved to the position of casting, inching the dummy head into arystallizer, lift platform will open cooling water, press the(casting preparation>button. PLC automatic detection and the screen shows the working curent, voltage, pressure of hydraulic system, hydraulic oil temperature, coling water pressure, cooling water flow rate,temperature of cooling water, filering valve operation, cooling water flow control valve working condition, the working state of electric contact.
Open the button of "casting", the magnesium liquid is pumped from the heat preservation funace to the front liuid tank, and the magnesium liquid flows into the cifluence plate of the iner core of the crystallizer. Open casting mold car gas ring, to be full of liquid magnesium alloy magnesium alloy is stable balance adjustment level dummy head, press the button to start casting, casting machine casting casting began to decline.
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