A foamed aluminum preparation device that effectively suppresses liquid separation

Abstract

An aluminum foam preparation device that can effectively suppress liquid separation, comprising a crucible and a gas blowing tube, the crucible is divided into a liquid storage chamber and a foaming chamber, the liquid storage chamber and the foaming chamber are separated by a partition, and at the bottom of the crucible A liquid-permeable hole is opened on the partition plate; the blowing pipe is fixedly installed on the side wall of the crucible, one end of the blowing pipe is located in the foaming chamber, and the other end of the blowing pipe is located outside the crucible and communicated with the blowing gas source; A foam output pipe is communicated with the crucible side wall on the top of the chamber, and an electromagnetic field generator is installed on the foam output pipe. The direction of the magnetic induction line of the electromagnetic field generated by the electromagnetic field generator is perpendicular to the direction of gravity. The invention introduces the principle of electromagnetic braking into the aluminum foam preparation process for the first time, effectively suppresses the phenomenon of liquid separation, can artificially control the thickness of the liquid film of bubbles, effectively prevents the phenomenon of bubble merging, and distributes the bubbles in the melt more uniformly.

Description

technical field [0001] The invention belongs to the technical field of aluminum foam preparation, and in particular relates to an aluminum foam preparation device which can effectively suppress the liquid separation phenomenon. Background technique [0002] As a new type of material, aluminum foam has excellent physical properties, chemical properties and mechanical properties, and is recyclable. The specific properties include light weight, high specific stiffness, good acoustic properties, excellent electromagnetic shielding properties, and good thermal properties. , high damping shock absorption performance and high impact energy absorption rate, etc., due to these excellent properties of aluminum foam, it has broad application prospects in today's material field, and is an engineering material with good development prospects, especially in transportation Applications in industry, aerospace industry and building structure industry. [0003] The performance of foamed alum...

AI Technical Summary

Problems solved by technology

[0003] The performance of foamed aluminum is mainly determined by its pore structure characteristics, and the pore structure characteristics mainly include pore size, pore shape and porosity. A large number of studies have shown that in the preparation process of foamed aluminum, the foam generated in the intermediate link is inevitably affected by gravity factors. Under the influence of gravity, the foam will appear liquid separation phenomenon. When the liquid separation phenomenon occurs, the bubble liquid film in the foam will be obviously thinner, and individual small bubbles will merge into large bubbles, and the bubbles in the melt There will also be uneven distribution, which will lead to the instability of the pore structure characteristics, and finally affect the material properties of foamed aluminum

Therefore, if a way to suppress the phenomenon of liquid separation cannot be found as soon as possible, it will seriously restrict the improvement of the performance of foamed aluminum materials.

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