CN107586983A - A kind of production technology accelerated internal cooling and improve foamed aluminium uniform in foaming degree - Google Patents
A kind of production technology accelerated internal cooling and improve foamed aluminium uniform in foaming degree Download PDFInfo
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- CN107586983A CN107586983A CN201710842692.8A CN201710842692A CN107586983A CN 107586983 A CN107586983 A CN 107586983A CN 201710842692 A CN201710842692 A CN 201710842692A CN 107586983 A CN107586983 A CN 107586983A
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Abstract
The invention discloses a kind of production technology accelerated internal cooling and improve foamed aluminium uniform in foaming degree, comprise the following steps：(1) aluminum or aluminum alloy is fused into liquid, obtains aluminium liquid；(2) adhesion agent is added into aluminium liquid, after being well mixed, obtains viscosifying liquid；(3) under agitation, liquid nitrogen or dry ice are added into thickening liquid, when viscosifying liquid and being cooled to higher than 25~35 DEG C of freezing point, obtains foamed material；(4) foamed material is poured into mould, coagulation forming.Present invention process is simple, easily implement, existing foaming agent is replaced with liquid nitrogen or dry ice, safety and environmental protection, cost is low, and when adding liquid nitrogen or dry ice, liquid nitrogen or dry ice endothermic gasification, are cooled down from the inside of aluminium liquid, and this mode cools fast and uniform, so as to reduce the sinking of the floating of bubble and aluminium liquid, solves uneven problem caused by foaming graded.
Description
Technical field
The present invention relates to material manufacture field, relates in particular to a kind of internal cooling of accelerating and improves foamed aluminium uniform in foaming
The production technology of degree.
Background technology
Foamed aluminium is after adding foaming agent in pure aluminum or aluminum alloy, and the material that is formed by foam process, it is simultaneously simultaneous
Have metal and bubble feature, its density is small, high-selenium corn impact capacity is strong, high temperature resistant, fire protecting performance are strong, anticorrosive, sound insulation and noise reduction,
Low thermal conductivity, electromagnetic wave shielding are high, weatherability is strong, have filter capacity, easy processing, easy to install, forming accuracy is high, can carry out surface
Application.
The preparation technology of existing foamed aluminium is that aluminium skimmings particle and foaming agent first are mixed with into foamed aluminium blank, then will bubble
Poured into after the fusing of foam aluminium blank in mould, and cooling processing is carried out to mould, cooling obtains foamed aluminium material.
The conventional foaming agent of foamed aluminium is TiH at present2, TiH2Because of premature decomposition so that foamed aluminium is difficult to uniformly, and carry out
During cooling processing, can only gradually it cool down from outside to inside, this needs a period of time, during this period of time, bubble floating, also causes to steep
The pore structure uniformity of foam aluminium is poor.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of simple in construction, can reduce production cost, improve foamed aluminium
Pore structure uniformity accelerate internal cooling improve foamed aluminium uniform in foaming degree production technology.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that：One kind accelerates internal cooling and improves foam
The production technology of aluminium uniform in foaming degree, comprises the following steps：
(1) aluminum or aluminum alloy is fused into liquid, obtains aluminium liquid；
(2) adhesion agent is added into aluminium liquid, after being well mixed, obtains viscosifying liquid；
(3) under agitation, liquid nitrogen or dry ice are added into thickening liquid, when thickening liquid is cooled to higher than freezing point 25
At~35 DEG C, foamed material is obtained；
(4) foamed material is poured into mould, coagulation forming.
Further, the adhesion agent is MnO2、Ca、Mg、SiC、Al2O3, Pb, any one or more in charcoal, add
Enter 1.8~2.3% that amount is aluminium liquid quality.
Further, in step (3), while liquid nitrogen or dry ice is added into thickening liquid, also added into thickening liquid
Foaming agent, the addition of the foaming agent are no more than the 5% of thickening liquid quality.
Further, it is right when foamed material pours into mould and foamed material is poured into after mould in 15~25S
Mould carries out ultrasonic activation processing.
Further, liquid nitrogen or dry ice are added in thickening liquid by agitator, the agitator include agitating shaft and
The more than one paddle being fixed on the agitating shaft, liquid nitrogen or dry ice passage are provided with along its axial direction on the agitating shaft,
At least one paddle is hollow-core construction and connected with the liquid nitrogen or dry ice passage, and the stirring of the hollow-core construction
Leaf is provided with multiple ventholes.
Further, the venthole is located at the lee face of the paddle.
Further, it is coated with heat-barrier material on liquid nitrogen or the dry ice conduit wall.
Beneficial effects of the present invention are embodied in：
Present invention process is simple, easily implements, existing foaming agent is replaced with liquid nitrogen or dry ice, and safety and environmental protection, cost is low, and
And when adding liquid nitrogen or dry ice, liquid nitrogen or dry ice endothermic gasification, cooled down from the inside of aluminium liquid, this mode cools fast and equal
It is even, so as to reduce the sinking of the floating of bubble and aluminium liquid, solve uneven problem caused by foaming graded, improve foam
The pore structure uniformity of aluminium, in addition, the present invention enormously simplify the production work of foamed aluminium without previously prepared foamed aluminium blank
Skill, production cost is reduced, there is extraordinary application prospect.
Brief description of the drawings
Fig. 1 is the first structural representation for implementing the production equipment of the present invention.
Fig. 2 is second of structural representation for implementing the production equipment of the present invention.
Fig. 3 is enlarged drawing at A.
In accompanying drawing the mark of each part for：1 mixing tank, 2 aluminium liquid storage tanks, 3 adhesion agent storage tanks, 4 liquid nitrogen or dry ice storage tank, 5
Foaming agent storage tank, 61 agitating shafts, 611 liquid nitrogen or dry ice passage, 62 paddles, 621 ventholes, 63 motor, 7 moulds,
71 asbestos, 8 mixing tank elevating mechanisms, 9 agitator elevating mechanisms, 10 valves.
Embodiment
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.It should be noted that in the feelings not conflicted
Under condition, the feature in embodiment and embodiment in the application can be mutually combined.
The present invention accelerates the production technology that internal cooling improves foamed aluminium uniform in foaming degree, comprises the following steps：
(1) aluminum or aluminum alloy is fused into liquid, obtains aluminium liquid；
(2) under the conditions of 650~680 DEG C, adhesion agent is added into aluminium liquid, after being well mixed, obtains viscosifying liquid；
(3) under agitation, liquid nitrogen or dry ice are added into thickening liquid, when thickening liquid is cooled to higher than freezing point 25
At~35 DEG C, foamed material is obtained；
(4) foamed material is poured into mould, coagulation forming.
The present invention adds liquid nitrogen or dry ice, liquid nitrogen or dry ice endothermic gasification into thickening liquid, and big gas is formed in aluminium liquid
Bubble, these big bubbles are stirred and form small bubble again, and here it is the foam theory of the present invention, and liquid nitrogen or dry ice absorb heat
Rapidly aluminium liquid can be cooled again, this cooling method is carried out from the inside of aluminium liquid, and cooling is fast and uniform, so as to reduce
The sinking of the floating and aluminium liquid of bubble, uneven problem caused by solving foaming graded, improve the pore structure of foamed aluminium
Uniformity, in addition, the present invention enormously simplify the production technology of foamed aluminium without previously prepared foamed aluminium blank.
In one embodiment, the adhesion agent is MnO2、Ca、Mg、SiC、Al2O3, Pb, in charcoal any one or it is more
Kind, addition is the 1.8~2.3% of aluminium liquid quality.On the one hand adhesion agent can increase the viscosity of aluminium liquid, ensure the stagnant of bubble
Stay, on the other hand can reduce the freezing point of aluminium liquid.
In one embodiment, in step (3), while liquid nitrogen or dry ice is added into thickening liquid, also into thickening liquid
Foaming agent is added, the addition of the foaming agent is no more than the 5% of thickening liquid quality.In the present invention, although existing liquid nitrogen or dry
Ice uses as foaming agent, but can also separately add the existing foaming agent used, such as TiH in specific implementation2, foaming effect can be increased
Fruit, 5% of addition no more than thickening liquid quality can reach existing foaming effect.
In one embodiment, when foamed material pours into mould and foamed material pours into 15~25S after mould
It is interior, ultrasonic activation processing is carried out to mould.In the presence of ultrasonic wave, bubble conglobulates certainly, and bubble is scattered
Property is further improved, so as to improve the pore structure uniformity of foamed aluminium.
In one embodiment, liquid nitrogen or dry ice are added in thickening liquid by agitator, and the agitator includes agitating shaft
And the more than one paddle on the agitating shaft is fixed on, it is provided with liquid nitrogen along its axial direction on the agitating shaft or dry ice leads to
Road, at least one paddle is hollow-core construction and connected with the liquid nitrogen or dry ice passage, and the hollow-core construction is described
Paddle is provided with multiple ventholes.This addition manner, existing device is taken full advantage of, it is easy to operate, and foaming effect can
Lean on.
Using the foamed aluminium obtained by production technology of the present invention, the pore structure uniformity is higher than what prior art produced, whole
Body structural strength is more preferable, and stability is higher.
Below, there is provided a kind of production equipment for implementing the present invention, referring to Fig. 2 and Fig. 3, it includes：
Mixing tank 1, the mixing place as raw material；
Aluminium liquid storage tank 2, connected with the mixing tank 1, for adding aluminium liquid into the mixing tank 1；
Adhesion agent storage tank 3, connected with the mixing tank 1, for adding adhesion agent into the mixing tank 1；
Liquid nitrogen or dry ice storage tank 4, connected with the mixing tank 1, for adding liquid nitrogen or dry ice into the mixing tank 1；
Agitator, for being stirred to the raw material in the mixing tank 1, the agitator include agitating shaft 61 with
And the more than one paddle 62 on the agitating shaft 61 is fixed on, upper end and the liquid nitrogen or the dry ice of the agitating shaft 61
The discharging opening of storage tank 4 is rotatably assorted connection, and is provided with axle envelope part between the two, on the agitating shaft 61 along its axial direction be provided with liquid nitrogen or
Dry ice passage 611, at least one paddle 62 is hollow-core construction and connected with the liquid nitrogen or dry ice passage 611, and is somebody's turn to do
The paddle 62 of hollow-core construction is provided with multiple ventholes 621；
And mould 7, for contoured foam aluminium, the bottom open design of the mixing tank 1, the mould 7
Bottom interior wall be provided with annular groove, the bottom of the mixing tank 1 is inserted in the annular groove, and is provided with sealing between the two
Part.
When producing foamed aluminium using the present invention, in aluminium liquid storage tank 2 then solid aluminum feedstock heating and melting will into aluminium liquid
Aluminium liquid is added in mixing tank 1, and afterwards under the conditions of 650~680 DEG C, the adhesion agent in adhesion agent storage tank 3 is added into batch mixing
In tank 1, after aluminium liquid is well mixed with adhesion agent, agitator is simultaneously stretched into mixing tank 1 by turn on agitator, opens liquid nitrogen or dry ice
The discharging opening of storage tank 4, liquid nitrogen or liquid nitrogen or dry ice endothermic gasification in dry ice storage tank 4, pressure is formed, into agitating shaft 61
Liquid nitrogen or dry ice passage 611, and venthole 621 by the paddle 62 of hollow-core construction and thereon is discharged, liquid nitrogen or dry ice stream
After going out liquid nitrogen or dry ice storage tank 4, continue gradually heat absorption and gasify, big bubble is formed in aluminium liquid, these big bubbles and quilt
Agitator is smashed and forms small bubble, and here it is the foam theory of the present invention, and liquid nitrogen or dry ice heat absorption can be rapidly
Aluminium liquid is cooled, this cooling method is carried out from the inside of aluminium liquid, and cooling is fast and uniformly, so as to reduce the floating of bubble and
The sinking of aluminium liquid, when soon close to aluminium liquid freezing point (being higher than 25~35 DEG C of freezing point), mixing tank 1 and agitator are proposed, aluminium
Liquid stream enters mould 7, is molded afterwards according to existing method.
It is noted that when proposing and cooling and stirring device, the outflow of liquid nitrogen or dry ice is kept, is easy to next use.
Preferably, the seal is the asbestos being filled between the bottom of the mixing tank 1 and the annular groove.Adopt
It is convenient to implement with this design, and sealing effectiveness is reliable；Axle envelope part selects existing conventional mechanical shaft seal.
Preferably, in addition to mixing tank elevating mechanism 8, for the mixing tank 1 to be proposed from the mould 7.
In specific implementation, mixing tank elevating mechanism 8 can select hoist engine, the conventional jacking equipment such as electric expansion bar or hydraulic cylinder.
Preferably, in addition to agitator elevating mechanism 9, for the agitator to be proposed from the mixing tank 1.Specifically
In implementation, agitator elevating mechanism 9 can select hoist engine, the conventional jacking equipment such as electric expansion bar or hydraulic cylinder.It is specific real
Shi Zhong, agitator elevating mechanism 9 are connected with liquid nitrogen or dry ice storage tank 4, avoid interference with the rotation of agitating shaft 61.
Preferably, the agitator also includes motor 63, the output shaft of the motor 63 and the agitating shaft 61 it
Between be connected with chain belt drive structure.Namely driving wheel is installed on the output shaft of motor 63, installed on agitating shaft 61 driven
Wheel, winding driving-chain or transmission belt between driving wheel and driven pulley, agitating shaft 61 is driven to rotate by motor 63 with this.
Referring to Fig. 1, the present invention can also install cylinder in the bottom of motor 63 or hydraulic cylinder 11 carrys out drive motor 63
Lifting, so as to drive the agitator to lift, save agitator elevating mechanism 9.
Preferably, the agitating shaft 61 is provided with more than two layers of the paddle 62, wherein the undermost stirring
Leaf 62 is hollow-core construction and connected with the liquid nitrogen or dry ice passage 611.So design, nitrogen and carbon dioxide are from most lower
Side is discharged, and bubbling efficiency is high, and the undermost paddle 62 not only can be vented but also can stir, other each layer paddles 62
Stomata is not set out, only serves the effect that stirring crushes bubble, the vertical cross-section outer end of the paddle 62 is greater than the inner, to increase
Add the disturbance to aluminium liquid periphery, to reduce the centrifugal motion of aluminium liquid.
Certainly, as needed, this equipment also includes ultrasonic oscillation device, is shaken for carrying out ultrasound to the mould 7
Dynamic processing；Foaming agent storage tank 5, the foaming agent storage tank 5 connect with the mixing tank 1, for adding hair into the mixing tank 1
Infusion.
In one embodiment, it is coated with heat-barrier material on the wall of liquid nitrogen or dry ice passage 611.Liquid nitrogen can so be prevented
Or dry ice excessively quickly gasifies, ensure that outlet is smooth.
In one embodiment, the venthole 621 is located at the lee face of the paddle 62.So design, equally also may be used
To prevent liquid nitrogen or dry ice from excessively quickly gasifying, and it is not easy to block up into aluminium liquid.
In specific implementation, the discharging opening of aluminium liquid storage tank 2, adhesion agent storage tank 3 and foaming agent storage tank 5 is respectively connected with discharge nozzle,
Discharge nozzle is stretched into mixing tank 1, the discharging of aluminium liquid storage tank 2, adhesion agent storage tank 3, foaming agent storage tank 5 and liquid nitrogen or dry ice storage tank 4
Valve 10 is mounted at mouthful, is easy to the adition process of safe each raw material of control.
In specific implementation, the mixing tank 1 is coated with insulation material, prevents that aluminium liquid quickly cools down when pouring out aluminium liquid.
In specific implementation, the tank body of liquid nitrogen or dry ice storage tank 4 is provided with regulatable firing equipment, it is convenient control liquid nitrogen and
The outflow of dry ice.
It should be understood that example as described herein and embodiment are not intended to limit the invention, this area only for explanation
Technical staff can make various modifications or change according to it, within the spirit and principles of the invention, any modification for being made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (7)
1. a kind of production technology accelerated internal cooling and improve foamed aluminium uniform in foaming degree, it is characterised in that comprise the following steps：
(1) aluminum or aluminum alloy is fused into liquid, obtains aluminium liquid；
(2) adhesion agent is added into aluminium liquid, after being well mixed, obtains viscosifying liquid；
(3) under agitation, liquid nitrogen or dry ice are added into thickening liquid, when thickening liquid is cooled to higher than freezing point 25~35
DEG C when, obtain foamed material；
(4) foamed material is poured into mould, coagulation forming.
2. accelerate the production technology that internal cooling improves foamed aluminium uniform in foaming degree as claimed in claim 1, it is characterised in that
The adhesion agent is MnO2、Ca、Mg、SiC、Al2O3, Pb, any one or more in charcoal, addition is aluminium liquid quality
1.8~2.3%.
3. accelerating the production technology that internal cooling improves foamed aluminium uniform in foaming degree as claimed in claim 1 or 2, its feature exists
In in step (3), adding liquid nitrogen or while dry ice into thickening liquid, also adding foaming agent, the foaming into thickening liquid
The addition of agent is no more than the 5% of thickening liquid quality.
4. accelerating the production technology that internal cooling improves foamed aluminium uniform in foaming degree as claimed in claim 1 or 2, its feature exists
In when foamed material pours into mould and foamed material is poured into after mould in 15~25S, and mould is surpassed
Acoustic vibration is handled.
5. accelerating the production technology that internal cooling improves foamed aluminium uniform in foaming degree as claimed in claim 1 or 2, its feature exists
In liquid nitrogen or dry ice are added in thickening liquid by agitator, and the agitator includes agitating shaft and is fixed on the stirring
More than one paddle on axle, liquid nitrogen or dry ice passage are provided with along its axial direction on the agitating shaft, it is at least one described to stir
Leaf is mixed hollow-core construction and connect with the liquid nitrogen or dry ice passage, and the paddle of the hollow-core construction provided with it is multiple go out
Stomata.
6. accelerate the production technology that internal cooling improves foamed aluminium uniform in foaming degree as claimed in claim 5, it is characterised in that
The venthole is located at the lee face of the paddle.
7. accelerate the production technology that internal cooling improves foamed aluminium uniform in foaming degree as claimed in claim 5, it is characterised in that
Heat-barrier material is coated with liquid nitrogen or the dry ice conduit wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710842692.8A CN107586983A (en) | 2017-09-18 | 2017-09-18 | A kind of production technology accelerated internal cooling and improve foamed aluminium uniform in foaming degree |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710842692.8A CN107586983A (en) | 2017-09-18 | 2017-09-18 | A kind of production technology accelerated internal cooling and improve foamed aluminium uniform in foaming degree |
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| CN107586983A true CN107586983A (en) | 2018-01-16 |
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| CN201710842692.8A Withdrawn CN107586983A (en) | 2017-09-18 | 2017-09-18 | A kind of production technology accelerated internal cooling and improve foamed aluminium uniform in foaming degree |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109055829A (en) * | 2018-10-09 | 2018-12-21 | 合肥斯姆雷品牌管理有限公司 | A kind of continuous foamed technique of foamed aluminium |
| CN109136619A (en) * | 2018-10-09 | 2019-01-04 | 合肥斯姆雷品牌管理有限公司 | It is a kind of that internal cooling foamed aluminium foamed system and method may be implemented |
| CN111394605A (en) * | 2020-03-20 | 2020-07-10 | 江苏大学 | TiB2Preparation method of particle reinforced foamed aluminum/aluminum alloy |
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| CN1179474A (en) * | 1996-10-10 | 1998-04-22 | 中国科学院固体物理研究所 | Process for preparing adjustable foam size foamed aluminium |
| CN1546696A (en) * | 2003-12-03 | 2004-11-17 | 东南大学 | Low porosity closed cell foam aluminum alloy and its preparation method |
| CN107012353A (en) * | 2017-04-21 | 2017-08-04 | 新疆大学 | A kind of inexpensive tackifier and foaming agent for preparing foamed aluminium |
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2017
- 2017-09-18 CN CN201710842692.8A patent/CN107586983A/en not_active Withdrawn
Patent Citations (4)
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|---|---|---|---|---|
| CN1179474A (en) * | 1996-10-10 | 1998-04-22 | 中国科学院固体物理研究所 | Process for preparing adjustable foam size foamed aluminium |
| CN1546696A (en) * | 2003-12-03 | 2004-11-17 | 东南大学 | Low porosity closed cell foam aluminum alloy and its preparation method |
| CN107012353A (en) * | 2017-04-21 | 2017-08-04 | 新疆大学 | A kind of inexpensive tackifier and foaming agent for preparing foamed aluminium |
| CN107058781A (en) * | 2017-06-16 | 2017-08-18 | 尚圣杰 | The continuous foamed new technology of metal |
Non-Patent Citations (1)
| Title |
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| 张人佶主编: "《先进成形制造实用技术》", 30 August 2009, 清华大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109055829A (en) * | 2018-10-09 | 2018-12-21 | 合肥斯姆雷品牌管理有限公司 | A kind of continuous foamed technique of foamed aluminium |
| CN109136619A (en) * | 2018-10-09 | 2019-01-04 | 合肥斯姆雷品牌管理有限公司 | It is a kind of that internal cooling foamed aluminium foamed system and method may be implemented |
| CN111394605A (en) * | 2020-03-20 | 2020-07-10 | 江苏大学 | TiB2Preparation method of particle reinforced foamed aluminum/aluminum alloy |
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