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Hollow spherical aluminum foam material and its preparation method and filled sphere used in the preparation

A foamed aluminum and hollow ball technology, which is applied in the field of filled balls and foamed aluminum materials, can solve the problems of long warm-up time, high energy consumption and water consumption, and difficult cleaning, so as to achieve uniform foam body, improve product quality, and improve sound-absorbing effect Effect

Active Publication Date: 2016-03-23
王宁伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a hollow spherical aluminum foam material and its preparation method, so that it has the advantages of both open-cell and closed-cell types, and at the same time overcomes the long preheating time and energy consumption in the existing technology Technical defects such as excessive water and difficult cleaning make it effective in saving energy, reducing production costs and improving product quality

Method used

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  • Hollow spherical aluminum foam material and its preparation method and filled sphere used in the preparation
  • Hollow spherical aluminum foam material and its preparation method and filled sphere used in the preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Prepare filled spheres earlier: by weight, 10% wood charcoal is prepared into the wood charcoal bead that diameter is 3mm with granulator earlier, stand-by; % vermiculite powder, put the mixture and wood charcoal pellets into the granulator, and continuously spray water in the machine, like a snowball, so that the mixture is evenly coated on the surface of the wood charcoal pellets, making Filled spheres with a coating layer of 2 mm and a diameter of 5 mm were air-dried for later use.

[0037] Put the dried filled sphere into a mold of 1000*500*100cm, make it dense, and start preheating. When the preheating temperature reaches about 300°C, the filled sphere forms a hollow filled sphere, forming a hollow filled sphere. Continue to preheat to a temperature of 600°C, keep the temperature constant for 25 minutes, and then carry out the operation of infiltrating aluminum liquid, controlling the weight ratio of filled spheres to aluminum liquid to be 1:3. The vacuum pump con...

Embodiment 2

[0039] Prepare filled spheres first: by weight, first prepare 15% wood charcoal with a granulator into wood charcoal pellets with a diameter of 5mm, and set aside; air-dried naturally for later use. Then mix 30% sepiolite, 40% bentonite and 15% vermiculite powder, put the mixture into the granulator together with wood charcoal pellets, and spray water continuously in the machine at the same time, like a snowball Similarly, the mixture is evenly coated on the surface of the wood charcoal pellets to make a filled sphere with a coating layer of 2.5mm and a diameter of 7.5mm, air-dried naturally, and set aside.

[0040] Put the dried filled sphere into a 400*400*150 mold, vibrate to make it compact, and start preheating. When the heating temperature reaches about 350°C, the filled sphere will form a hollow filled sphere, and continue to preheat. Heat to a temperature of 650°C, keep the temperature constant for 30 minutes, and then carry out the operation of seepage aluminum liquid...

Embodiment 3

[0043] By weight, first 12% wood charcoal is prepared into wood charcoal pellets with a diameter of 5.5mm with a granulator, stand-by; then 35% sepiolite, 38% nano-bentonite and 15% vermiculite powder Mixing, put the mixture and wood charcoal pellets into the granulator, and spray water continuously in the machine at the same time, like a snowball, so that the mixture is evenly coated on the surface of the wood charcoal pellets to form a coating layer Filled spheres with a diameter of 2.5 mm and a diameter of 8 mm were air-dried for later use.

[0044] Put the prepared filled sphere into a 500*500*150 mold, vibrate to make it dense, and start preheating. When the preheating temperature reaches 350°C, the filled sphere will start to burn and form a hollow filled sphere. Continue Preheat to a temperature of 650°C, keep the temperature constant for 40 minutes, and then perform the operation of percolating molten aluminum, controlling the weight ratio of filled spheres to molten a...

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Abstract

The invention discloses a hollow ball foamed aluminum material, a preparation method of the hollow ball foamed aluminum material and filling spheres used by the preparation method. The hollow ball foamed aluminum material comprises multiple hollow balls which are connected with each other and have individual bubbles and communicated holes are formed between the hollow balls so that an open pore-close pore mixed structure is formed. The preparation method comprises the following steps of preparing the core-shell filling spheres comprising 10-15% of charcoal as a core, 30-45% of sepiolite, 35-40% of sodium bentonite and 10-15% of vermiculite powder as a coating, putting the spheres into a mold so that the spheres are compact, carrying out molten aluminum transfusion according to a weight ratio of the filling spheres to the molten aluminum of 1: 3 to 1: 4, carrying out gas exhaust at the bottom side of the mold by a vacuum pump so that the molten aluminum permeates into gaps between the hollow filling spheres, carrying out cooling, removing the mold, and carrying out cleaning by water to obtain the hollow ball foamed aluminum material. The hollow ball foamed aluminum material solves the problem that the existing material is cleaned difficultly and is heated for a long time, greatly reduces energy consumption and effectively improves anti-compression performances and sound-absorbing effects.

Description

technical field [0001] The invention relates to an aluminum foam material, in particular to a hollow ball aluminum foam material, a preparation method thereof and a filled sphere used in the preparation, belonging to the technical field of preparation of new functional materials. Background technique [0002] Aluminum foam material is a new type of functional material, which has been invented for more than 40 years. Up to now, a variety of methods for producing foamed aluminum have been developed at home and abroad, but basically can be divided into two types, one is that the bubbles exist independently, called the independent bubble type, also known as the closed cell type; The bubbles are in a continuous state, which is called continuous bubble type, also known as open cell type. [0003] The production process adopted by the closed-cell aluminum foam material is to make the hydride foam in the high-temperature aluminum liquid, and its noise reduction and filtration perfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C21/00B22D23/04
Inventor 王宁伟
Owner 王宁伟
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