Device for preparing aluminum foam and copper foam and preparation method thereof

Abstract

The invention discloses a device for preparing aluminum foam and copper foam. The device comprises an inner die, an outer die, a crucible and a liquid raising pipe, wherein compacted seepage particlesare stored in the inner die; a stainless steel net grid and a screen mesh are arranged at the bottom end of the inner die which is arranged in an empty chamber of the outer die; the outer die is positioned on the crucible and communicates with the crucible; the liquid raising pipe is positioned in the crucible in which molten aluminum is stored; the outer edge of the liquid raising pipe is connected to the bottom end of the outer die, and the liquid raising pipe is fixed to the top end of the crucible; an air feeding pipe is connected to the outer wall of the crucible. According to the device, a vacuum-pumped hood is arranged; the molten aluminum or molten copper can flow only along a seam which is formed through a mould weight and the hood at the end of seepage, so as to prevent the molten aluminum or molten copper from overflowing; circulating water pipes are arranged and increase the molten aluminum cooling speed, thus the backflow is avoided, and the structure and performance stability of the aluminum foam and the copper aluminum can be ensured; the stainless steel net grid and the screen mesh are movably arranged, so that the seepage particles in the inner die can maintain uniform compactness after being compacted.

Description

technical field [0001] The invention relates to the technical field of preparing foamed aluminum and foamed copper, in particular to a device for preparing foamed aluminum and foamed copper and a preparation method thereof. Background technique [0002] At present, in the process of preparing foamed aluminum and copper foam by the low-pressure infiltration method in China, the following disadvantages generally exist: (1) Since the aluminum liquid (or copper liquid) at the end of the infiltration process cannot be solidified in time after the infiltration process is completed, it will cause aluminum Liquid (or copper liquid) overflows along the upper cover of the seepage device, thereby increasing the risk of the preparation process; (2) During the process of preparing foamed aluminum and foamed copper materials using the low-pressure seepage method, because the top of the riser pipe cannot be timely Solidification will cause the unsolidified aluminum liquid (or copper liquid...

AI Technical Summary

Problems solved by technology

[0002] At present, in the process of preparing foamed aluminum and copper foam by the low-pressure infiltration method in China, the following disadvantages generally exist: (1) Since the aluminum liquid (or copper liquid) at the end of the infiltration process cannot be solidified in time after the infiltration process is completed, it will cause aluminum Liquid (or copper liquid) overflows along the upper cover of the seepage device, thereby increasing the risk of the preparation process; (2) During the process of preparing foamed aluminum and foamed copper materials using the low-pressure seepage method, because the top of the riser pipe cannot be timely Solidification will cause the unsolidified aluminum liquid (or copper liquid) to flow back into the crucible along the riser pipe after the air pressure is removed. The returned aluminum liquid (or copper liquid) also includes the The molten aluminum (or molten copper) infiltrated into the seepage particles will cause the lower end of the composite of the obtained seepage particles and molten aluminum (or molten copper) to be non-compact, which will affect the structure and performance of aluminum foam and copper foam materials; (3) Since the bottom of the inner mold is fixed, when the seepage particles are tight, only the particles above the inner mold can move downward, while the particles below the inner mold cannot move, which will cause the seepage particles in the inner mold to be compacted After that, there is a phenomenon of uneven compactness

[0003] The above phenomena will have different degrees of influence on the preparation of foamed aluminum, thereby affecting the quality of foamed aluminum and copper foam

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