Heat pipe cooling heat exchange method for aluminum alloy wheel low-pressure casting die
A technology of low-pressure casting and aluminum alloy, which is applied in the field of cooling and heat exchange of aluminum alloy low-pressure casting molds. It can solve the problems of water vapor blocking channels and loss, complex water circulation equipment, and easy fouling of water channels, so as to improve the performance of castings and casting production. Efficiency, temperature reduction, improved performance quality and productivity effects
Inactive Publication Date: 2011-02-02
CITIC DICASTAL
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Problems solved by technology
However, the problem is that the water circulation equipment is complicated, the water channel is easy to scale and rust, and
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[0015] The method for cooling and exchanging heat of the heat pipe of the aluminum alloy wheel low-pressure casting mold of the present invention will be further described in conjunction with specific implementation modes.
[0016] Such as figure 1 As shown, the heat pipe cooling heat exchange device is divided into three stages from top to bottom, which are condensation section, adiabatic section, and evaporation section in turn, and the heat is smoothly exported from the heat pipe.
[0017] The heat pipe cooling and heat exchange method of the present invention is aimed at the low-pressure casting mold of the aluminum wheel, and the heat pipe is hereby made into a standard heat pipe part. The outer diameter of the heat pipe shell is 12mm, the inner diameter is 8mm, the shell material is carbon steel, and the heat conduction working medium is naphthalene. The working temperature of the heat pipe is 300°C to 450°C, and the preheating temperature of the low pressure casting mo...
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Abstract
The invention provides a heat pipe cooling heat exchange method for an aluminum alloy wheel low-pressure casting die. When in use, naphthalene is used as a heat pipe heat-conducting working medium, a heat pipe shell material is made of carbon steel, and the content of the heat-conducting working medium naphthalene and the pipe diameter of a shell are calculated according to the demand of heat irradiation of a die. in the operation of the method, the liquid working medium naphthalene adsorbs a heat phase to be changed into stream at the evaporating section (one side in contact with the die and aluminum liquid); under tiny pressure difference, the stream flows to a condensing section and is condensed and liquefied at the condensing section to rapidly lead heat out; and under the action of a capillary liquid sucking core, the steam flows back to the evaporating section to finish circulation. The crystallizing solidification of the casting and the cooling heat exchange of the temperature of the die are finished by repeatedly and continuously leading heat out.
Description
[0001] technical field [0002] The invention relates to a method for cooling and exchanging heat of a mould, in particular to a method for cooling and exchanging heat in an aluminum alloy low-pressure casting mould, using heat pipe technology. Background technique [0003] Alloy wheels, as the only appearance safety part of a car, need to continuously improve their performance and quality under the demand of lightweight and low cost in the highly competitive global automotive industry. Then, the key to improving the performance and quality of aluminum wheels is to control the solidification process of castings, that is, to control the cooling and heat transfer of casting molds. [0004] The traditional cooling methods are air cooling and water cooling. The cost of air cooling is low and safe, but the casting mold requires complex cooling channels and appropriate wall thickness design, and because the heat capacity of the gas is small, the efficiency of adjusting the heat f...
Claims
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Inventor 杜德喜屈丽杰张秀丰赵振久王大东
Owner CITIC DICASTAL