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Semi-continuous production line of closed-cell aluminum foam

A closed-cell aluminum foam, semi-continuous technology, applied in the field of aluminum foam production line, can solve the problems of uneven distribution of foam, difficulty in precise operation, poor fluidity of aluminum liquid, etc., to achieve simple and controllable production process and consistent performance Good, low production cost effect

Active Publication Date: 2012-07-18
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing process is simple, it also has the following deficiencies: (1) the consistency of the obtained product performance is difficult to effectively guarantee
This is because there are multiple pouring operations in the process, and once the temperature, time and other parameters in the process are controlled differently, it will inevitably lead to differences in the properties of the foamed aluminum products.
(2) It is difficult to operate precisely
TiH as described in US.pat.3743353 2 When used as a foaming agent to prepare aluminum foam, the stirring and foaming time is required to be controlled within 1-2 minutes, but the viscosity of the melt added with the tackifier and foaming agent is relatively high, resulting in poor fluidity, and it is prone to pouring difficulties during the pouring process, etc. Problems arise, which eventually lead to performance differences between batches
(3) It can only be operated intermittently, as the method described in CN1320710A has improved foreign patents, so that the difficulty of foamed aluminum operation is greatly reduced, but this method belongs to intermittent operations; it is difficult to prepare large-scale foamed aluminum products
The main reason here is still that pouring cannot take too long, and large-sized aluminum foam products require a large amount of aluminum liquid, and the pouring process takes a long time. If the pouring time is too long, it will inevitably lead to the need to pour aluminum liquid later. The fluidity is poor, and solidification may occur; (4) When the control is improper, a solid body with a certain thickness will appear at the bottom of the foam, and the distribution of the foam in the foam is uneven; (5) In order to solve the gap type aluminum foam production High cost authority, US patent US.pat6984356B2 and Chinese patent ZL200610032465.0 respectively describe a continuous preparation method and continuous foaming equipment for aluminum foam. Although these two patents can achieve low-cost continuous production of aluminum foam, it is difficult Prepare super-sized aluminum foam products

Method used

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  • Semi-continuous production line of closed-cell aluminum foam
  • Semi-continuous production line of closed-cell aluminum foam
  • Semi-continuous production line of closed-cell aluminum foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1, using pure aluminum as a raw material to prepare a semi-continuous production process for closed-cell aluminum foam.

[0023] In this embodiment, calcium metal is used as a tackifier, and titanium hydride is used as a foaming agent.

[0024] The specific implementation of this embodiment includes the following steps:

[0025] Step 1, assemble more than 000 composite molds. First place the asbestos rope soaked in high-temperature glue in the groove 023 on the bottom plate of the filling mold 020, then hoist the transition crucible 010 so that the bottom of the transition crucible 010 is embedded in the groove 023, and then, use high-temperature glue and asbestos powder The prepared paste fills the joint between the transition crucible 010 and the filling mold 020 to obtain a composite mold 000;

[0026] In the second step, preheat the composite mold 000, vacuum ladle 110, tundish 120 and foaming furnace 208. Their preheating temperatures are 680°C, 900°C, 900°...

Embodiment 2

[0036] Example 2, using ZL102 as a raw material to prepare a semi-continuous production process of closed-cell aluminum foam.

[0037] In this embodiment, calcium metal is used as a tackifier, and titanium hydride is used as a foaming agent.

[0038] The specific implementation of this embodiment is basically the same as that of Embodiment 1, the difference is the following process parameters.

[0039] ①. The preheating temperatures of composite mold 000, vacuum ladle 110, tundish 120 and foaming furnace 208 are 650°C, 900°C, 900°C, and 620°C respectively, and the preheating temperature is allowed to have a deviation of ±10°C.

[0040] ②. The melting temperature of ZL102 aluminum ingot is 780 in the melting furnace 100, and the melt is kept at this temperature. The melting and holding temperature are allowed to have a deviation of ±10°C.

[0041] 3., the tackifier calcium add-on of the present embodiment is 3%, and foaming agent add-on is 1.5%, and the time of stirring after ...

Embodiment 3

[0043] Example 3, using fly ash as a tackifier to prepare a semi-continuous production process of closed-cell aluminum foam.

[0044] In this embodiment, fly ash is used as a tackifier, zirconium hydride is used as a foaming agent, and pure aluminum is used as a raw material for production.

[0045] The specific implementation of this embodiment is basically the same as that of Embodiment 1, and the main difference with Embodiment 1 is as follows:

[0046] ①. The preheating temperature of the vacuum ladle 110 and the tundish 120 is the same as 780°C, and the preheating temperature is allowed to have a deviation of ±10°C.

[0047] ②. The melting temperature of pure aluminum ingots in the melting furnace 100 is 800, and the melt is kept warm at this temperature. The melting and holding temperatures are allowed to have a deviation of ±10°C.

[0048] 3. The amount of the tackifier fly ash added in the present embodiment is 5%; when the present embodiment proceeds to the "6th step...

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Abstract

The invention discloses a semi-continuous production line of closed-cell aluminum foam. The semi-continuous production line comprises a composite die, a continuous preheating system of the composite die, a melt melting and distributing system, a melt foaming system and a full-automatic cooling system. The continuous preheating system comprises the composite die and a tunnel preheating kiln with amobile movable baseplate; and the composite die is formed by movably connecting a transition crucible without upper and lower cover plate with a filling die. The melt melting and distributing system comprises a melting furnace, a vacuum ladle and a tundish, a stirring device capable of sucking a tackifier in a negative pressure manner is arranged at the upper part of the tundish, and a flow port is arranged at the lower part of the tundish. The melting foaming system comprises a viscosity sensor, the stirring device capable of sucking a foaming agent in the negative pressure manner and a foaming furnace. The full-automatic cooling system comprises a cooling fan and a cooling pipe, wherein an atomizing shower head is arranged at the upper part of the cooling pipe. The semi-continuous production line disclosed by the invention can realize semi-continuous production of the aluminum foam, reduce labor intensity and further effectively ensure the consistency of product performances.

Description

technical field [0001] The invention relates to a production line of foamed aluminum, in particular to a semi-continuous production line of closed-cell foamed aluminum. Background technique [0002] Aluminum foam is a kind of composite material with a large number of bubbles inside and the bubbles are distributed in the continuous metal phase to form a pore structure. It organically combines the metal characteristics of the continuous phase aluminum and the pore characteristics of the dispersed phase pores, making it unique. The characteristics of light density, good energy absorption performance, unique acoustic and thermal performance, and excellent electromagnetic shielding also make it have great application potential in the fields of construction, rail transit, machinery manufacturing, and aerospace. At present, large-scale industrial production prepares closed The method of porous aluminum foam is the melt foaming method. The melt foaming method has the advantages of ...

Claims

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Application Information

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IPC IPC(8): C22C1/08C22C21/00
Inventor 周向阳杨娟王辉文康伍上元刘宏专
Owner CENT SOUTH UNIV
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