Novel magnesium alloy casting pipette and pipetting method thereof

Abstract

The invention relates to a novel magnesium alloy casting pipette and a pipetting method thereof, and belongs to the technical field of magnesium alloy forming and pouring. The novel magnesium alloy casting pipette can effectively prevent magnesium alloy liquid from blocking a pipeline due to temperature reduction, save electric energy and reduce temperature fluctuation of the magnesium alloy liquid so as to guarantee the product quality. The novel magnesium alloy casting pipette comprises an inner-layer flow guide pipe, an outer-layer flow guide pipe, a sleeve arranged on the outer side of theinner-layer flow guide pipe in a sleeving manner, electric heating wires wound on the outer wall of the inner-layer flow guide pipe in a segmented manner, a thermocouple used for detecting the temperature of each electric heating wire and a heat preservation belt arranged between the sleeve and the electric heating wires, wherein a connecting flange is fixedly arranged on the sleeve, and one endof the sleeve is hinged to a liquid baffle plate covering the end of the inner-layer flow guide pipe. The pipetting method comprises the following steps of S1, segmented preheating; S2, pipette fixing; S3, pipette heating; and S4, material discharging.

Description

technical field [0001] The invention relates to a novel magnesium alloy casting pipette and a liquid pipetting method thereof, belonging to the technical field of magnesium alloy molding and pouring. Background technique [0002] Due to a series of advantages such as light weight and good vibration damping, magnesium alloy castings have been widely used in aerospace, national defense and military industries. Magnesium alloy pouring methods mainly include: tilting pouring, mechanical pump extraction, manual scooping and pressure flow transfer liquid pouring and other methods. Compared with pouring methods such as tilting pouring and mechanical pumps, the purity of magnesium alloy liquid is low, the process control is difficult; the requirements for workers' skills are high, and the risk factor is high. The emerging pressurized flow method has simple structure and low cost. It is easy to control, has the advantages of high purity in transporting magnesium alloy liquid, energy...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing magnesium alloy pipettes adopt the pouring method inclined downward. Unbalanced, easy to cause frequent tripping or damage to the heating wire

Moreover, the existing magnesium alloy liquid pipette generally has two or more bends, and it is difficult to dredge and maintain

There is no slag protection at the bottom of the pipette. During discontinuous pouring, the magnesium alloy liquid flowing back in the pipe directly impacts the crucible melt, which is likely to arouse the bottom sediment and reduce the purity of the magnesium alloy liquid, resulting in a decline in product quality or even scrapping. Flooding of slag into the pipette is easy to cause pipe blockage, especially when pipettes with small diameters are used for small-flow non-continuous delivery operations.

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