CN110016581B - Preparation method of open-cell foamed aluminum pore section - Google Patents
Preparation method of open-cell foamed aluminum pore section Download PDFInfo
- Publication number
- CN110016581B CN110016581B CN201910464013.7A CN201910464013A CN110016581B CN 110016581 B CN110016581 B CN 110016581B CN 201910464013 A CN201910464013 A CN 201910464013A CN 110016581 B CN110016581 B CN 110016581B
- Authority
- CN
- China
- Prior art keywords
- polyurethane foam
- foam board
- temperature
- polyurethane
- ribs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
- C22C1/081—Casting porous metals into porous preform skeleton without foaming
- C22C1/082—Casting porous metals into porous preform skeleton without foaming with removal of the preform
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a preparation method of an open-cell foamed aluminum profile, belongs to the technical field of foamed aluminum preparation processes, and solves the technical problems that ribs of a polyurethane plate are thin in the preparation process of a foamed aluminum plate, and the coarsening degree of the ribs is not uniform when the ribs of the polyurethane plate are coarsened by a glue spraying method. The solution is as follows: coarsening ribs in the polyurethane foam board → preparing slurry → grouting → preparing gypsum type prefabricated body → pouring aluminum liquid to prepare open-cell foam aluminum section; the coarsening process of the ribs in the polyurethane foam board comprises the following steps: preparing a polyurethane foam board with a porous structure, varnish and a diluent → preparing varnish diluent → completely soaking the polyurethane foam board in the varnish diluent, taking out the polyurethane foam board for drying, naturally air-drying → repeatedly soaking and air-drying for multiple times, and finishing coarsening of a middle rib of the polyurethane foam board. The coarsening process by using the paint soaking is simpler, and only needs to dip the paint for multiple times and then put out for drying, so that ribs in the polyurethane foam board can be coarsened relatively uniformly.
Description
Technical Field
The invention belongs to the technical field of foamed aluminum preparation processes, and particularly relates to a preparation method of an open-cell foamed aluminum profile.
Background
Foamed aluminum is a brand-new strategic functional structural material, reflects a new trend of multidisciplinary interpenetration of structural materials and functional materials, and shows a wide development space in the field of materials. The foamed aluminum has wide application in the industries of transportation, war industry, industrial materials, building industry and the like, so that the foamed aluminum becomes a strategic leading-edge hotspot material for competitive research of America, English, Japanese and Germany in the 21 st century and China.
The foamed aluminum is mainly used as a sound absorption and insulation material and is widely applied to various industries, such as a highway, an underground tunnel, noise control in an urban light rail, and a sound insulation wall of a vocal music classroom to improve sound effect. In addition, the foamed aluminum also has the functions of heat preservation, electromagnetic shielding and impact energy reduction. Due to the advantages, the demand of the foamed aluminum is increased year by year, and how to obtain the foamed aluminum product meeting the requirements is the problem to be solved.
At present, a gypsum template method (gypsum investment casting method) is an effective method for preparing foamed aluminum with high porosity, and the foamed aluminum prepared by the method has uniform pore structure, high porosity (more than 95 percent) and high aperture ratio (more than 98 percent), and has wide application in the aspects of fluid filtration, catalyst carriers, electromagnetic shielding and the like, but the method has some problems in the preparation of foamed aluminum plates: the used polyurethane carrier has fine pore ribs, so that the preparation of foamed aluminum is difficult, the obtained foamed aluminum has fine pore ribs and poor strength, and the application of the foamed aluminum is limited, so that the ribs of the polyurethane plate are fine and must be roughened to a certain extent when in use.
Disclosure of Invention
The invention provides a method for preparing a qualified open-cell foamed aluminum profile, which aims to overcome the defects of the prior art and solve the technical problems that the ribs of a polyurethane plate are thin in the preparation process of a foamed aluminum plate, and the coarsening degree of the ribs is not uniform when the ribs of the polyurethane plate are coarsened by adopting a glue spraying method.
The invention is realized by the following technical scheme.
The preparation method of the open-cell foamed aluminum profile comprises the following steps:
s1 coarsening ribs in polyurethane foam board
Preparing a polyurethane foam board with a pore structure, varnish and thinner;
II, adding a diluent into the varnish, and uniformly stirring the mixed solution to obtain varnish diluent, wherein the volume ratio of the varnish to the diluent is (4-6): 1;
III, completely soaking the polyurethane foam board prepared in the step I in the varnish diluent prepared in the step II, taking out after completely soaking, alternately and repeatedly soaking the front side and the back side for 4-6 times, and taking out and draining;
IV, hanging the polyurethane foam board which is dipped in the paint and dried in the step III in the air for natural air drying;
v, completely immersing the air-dried polyurethane plate in a varnish diluting solution again, and repeating the steps III and IV eight to twelve times in sequence to finish coarsening of ribs in the polyurethane foam plate for later use;
s2, preparing slurry
Firstly, weighing raw materials of gypsum, water, bentonite, anhydrous magnesium sulfate and cellulose according to the weight ratio of 360:190:30:40: 1; secondly, adding the weighed anhydrous magnesium sulfate powder into water, and fully stirring to completely dissolve the anhydrous magnesium sulfate in the water; thirdly, fully mixing the weighed gypsum, bentonite and cellulose together, slowly adding the mixture into the anhydrous magnesium sulfate solution by using a spoon, and stirring at a constant speed until the mixed slurry is in a cream state for later use;
s3, grouting
Placing the polyurethane board roughened in the step S1 on a smooth horizontal plate, and uniformly pouring the slurry prepared in the step S2 into the polyurethane board for later use;
s4 preparation of Gypsum-based preform
After the polyurethane foam board is filled with the slurry, the polyurethane foam board is dried in a drying oven at 40 ℃ in a blast environment for 8-10 times, each time lasts for 7-9 minutes, and then the polyurethane foam board is put into a high-temperature crucible resistance furnace for roasting, wherein the temperature rise curve of the roasting is as follows: the temperature is 20-90 ℃, the heating speed is 3.5 ℃/min, the heating time is 20min, and the temperature is kept at 90 ℃ for 1 h; the temperature is 90-240 ℃, the heating speed is 10 ℃/min, the heating time is 15min, and the temperature is maintained for 1h at 240 ℃; the temperature is 240-360 ℃, the temperature rising speed is 10 ℃/min, and the heating time is 12 min; the temperature is 360-460 ℃, the heating rate is 10 ℃/h, the heating time is 10min, and the temperature is maintained for 1h at 460 ℃; the temperature is 460-580 ℃, the heating rate is 10 ℃/min, the heating time is 12min, and the temperature is maintained at 580 ℃ for 1 h; 580-720 ℃, the heating rate is 10 ℃/h, the heating time is 14min, the temperature of 720 ℃ is kept for 1h, the polyurethane foam board is completely gasified, the roasted product is cooled to the room temperature along with the furnace, and the roasted product is taken out from the high-temperature crucible resistance furnace, thus obtaining the gypsum type preform
S5 pouring molten aluminum
Firstly, placing the gypsum type prefabricated body prepared in the step S4 in a resistance furnace, heating to 400-500 ℃, and then carrying out heat preservation; then pouring molten aluminum liquid into the gypsum mold, covering a sealing cover and vacuumizing to ensure that the gypsum mold is uniformly filled with the molten aluminum liquid; and finally, after the plate is cooled, flushing gypsum with water to prepare the open-cell foamed aluminum profile.
Further, the slurry material prepared in the step S2 needs to be subjected to the grouting operation of the step S3 as soon as possible.
Further, in the step IV, the polyurethane foam board is naturally dried for 2-5 hours according to the size of the polyurethane foam board, and the next soaking is carried out after the polyurethane foam board is completely dried.
Further, the polyurethane foam board prepared in the step S1 is used for preparing the polyurethane investment in the foamed aluminum board process.
Compared with the prior art, the invention has the beneficial effects that:
according to the preparation method of the open-cell foamed aluminum profile, provided by the invention, paint is used for soaking for coarsening, compared with coarsening methods of polyurethane foam plate ribs such as glue spraying and the like, the ribs in polyurethane can be coarsened relatively uniformly, the finally obtained foamed aluminum plate ribs are more uniform, in addition, the process is simpler by soaking with the paint, only multiple times of paint soaking are needed, then drying is carried out, and industrial production is easier to realize compared with other methods. The mechanical property of the prepared open-cell foamed aluminum profile is similar to that of foamed aluminum prepared by other methods.
Drawings
FIG. 1 is a topographical view of ribs in an undegraded polyurethane foam board.
FIG. 2 is a morphology diagram of ribs in a polyurethane foam board after three coarsenings.
FIG. 3 is a morphology diagram of ribs in a polyurethane foam board after six coarsening.
FIG. 4 is a morphology diagram of ribs in the polyurethane foam board after eight times of coarsening.
FIG. 5 is a graph showing the temperature rise in the calcination of the gypsum mold.
Detailed Description
The present invention will be described in further detail with reference to examples.
The preparation method of the open-cell foamed aluminum profile comprises the following steps:
s1 coarsening ribs in polyurethane foam board
Preparing a polyurethane foam board with a pore structure, varnish and thinner;
II, adding a diluent into the varnish, and uniformly stirring the mixed solution to obtain varnish diluent, wherein the volume ratio of the varnish to the diluent is 6: 1;
III, completely soaking the polyurethane foam board prepared in the step I in the varnish diluent prepared in the step II, taking out after completely soaking, alternately and repeatedly soaking the front side and the back side for 4-6 times, and taking out and draining;
IV, hanging the polyurethane foam board which is subjected to paint dipping and drying in the step III in the air for natural air drying, naturally air-drying for 2-5 hours according to the size of the polyurethane foam board, and soaking for the next time after the polyurethane foam board is completely dried;
and V, completely immersing the air-dried polyurethane plate in a varnish diluting solution again, and repeating the steps III and IV eight to twelve times in sequence to finish coarsening of ribs in the polyurethane foam plate for later use.
In this embodiment, the above steps iii to iv are repeated nine times in sequence, and after 9 sets of experiments, the average value is obtained as follows:
the experimental data show that the diameter of the rib increases in a unimodal trend in the process of painting, namely the rib increases slightly first, increases greatly from the middle and increases in a small range from the end. The required coarsened diameter can be achieved after about 8 times of painting, such as the morphology of the ribs in the coarsened polyurethane foam board shown in fig. 1 to fig. 4.
S2, preparing slurry
Firstly, weighing raw materials of gypsum, water, bentonite, anhydrous magnesium sulfate and cellulose according to the weight ratio of 360:190:30:40: 1; secondly, adding the weighed anhydrous magnesium sulfate powder into water, and fully stirring to completely dissolve the anhydrous magnesium sulfate in the water; thirdly, the weighed gypsum, bentonite and cellulose are fully mixed together, then the mixture is slowly added into the anhydrous magnesium sulfate solution by a spoon and stirred at a constant speed until the mixed slurry is in a cream state for later use.
S3, grouting
And (4) placing the polyurethane board roughened in the step S1 on a smooth horizontal plate, and uniformly pouring the slurry prepared in the step S2 into the polyurethane board for later use. It should be noted that since the grout hardens quickly, it is desirable to perform the grouting step as quickly as possible.
S4 preparation of Gypsum-based preform
After the polyurethane foam board is filled with the slurry, the polyurethane foam board is dried in a drying oven at 40 ℃ in a blast environment for 8-10 times, each time lasts for 7-9 minutes, and then the polyurethane foam board is put into a high-temperature crucible resistance furnace for roasting, wherein the temperature rise curve of the roasting is as follows: the temperature is 20-90 ℃, the heating speed is 3.5 ℃/min, the heating time is 20min, and the temperature is kept at 90 ℃ for 1 h; the temperature is 90-240 ℃, the heating speed is 10 ℃/min, the heating time is 15min, and the temperature is maintained for 1h at 240 ℃; the temperature is 240-360 ℃, the temperature rising speed is 10 ℃/min, and the heating time is 12 min; the temperature is 360-460 ℃, the heating rate is 10 ℃/h, the heating time is 10min, and the temperature is maintained for 1h at 460 ℃; the temperature is 460-580 ℃, the heating rate is 10 ℃/min, the heating time is 12min, and the temperature is maintained at 580 ℃ for 1 h; 580-720 ℃, the heating rate is 10 ℃/h, the heating time is 14min, the temperature of 720 ℃ is kept for 1h, the polyurethane foam board is completely gasified, the roasted product is cooled to the room temperature along with the furnace, the roasted product is taken out from the high-temperature crucible resistance furnace, namely the prepared gypsum type prefabricated body, before roasting, the high-temperature crucible resistance furnace is checked, the gypsum type prefabricated body is placed into the furnace for burning after no problem is found, the gasification temperature of the polyurethane foam board is about 260 ℃, the set program of the high-temperature crucible resistance furnace is slow heating, the polyurethane can be fully gasified, the hardness of the gypsum board can be better, and finally the gypsum board is heated to 720 ℃ to completely gasify the polyurethane foam board, so that the gypsum type prefabricated body is obtained.
S5 pouring molten aluminum
Firstly, placing the gypsum type prefabricated body prepared in the step S4 in a resistance furnace, heating to 400-500 ℃, and then carrying out heat preservation; then pouring molten aluminum liquid into the gypsum mold, covering a sealing cover and vacuumizing to ensure that the gypsum mold is uniformly filled with the molten aluminum liquid; and finally, after the plate is cooled, flushing gypsum with water to prepare the open-cell foamed aluminum profile. Further, the slurry material prepared in the step S2 needs to be subjected to the grouting operation of the step S3 as soon as possible.
Further, the polyurethane foam board prepared in the step S1 is used for preparing the polyurethane investment in the foamed aluminum board process.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (4)
1. The preparation method of the open-cell foamed aluminum profile is characterized by comprising the following steps of:
s1 coarsening ribs in polyurethane foam board
Preparing a polyurethane foam board with a pore structure, varnish and thinner;
II, adding a diluent into the varnish, and uniformly stirring the mixed solution to obtain varnish diluent, wherein the volume ratio of the varnish to the diluent is (4-6): 1;
III, completely soaking the polyurethane foam board prepared in the step I in the varnish diluent prepared in the step II, taking out after completely soaking, alternately and repeatedly soaking the front side and the back side for 4-6 times, and taking out and draining;
IV, hanging the polyurethane foam board which is dipped in the paint and dried in the step III in the air for natural air drying;
v, completely immersing the air-dried polyurethane plate in a varnish diluting solution again, and repeating the step III and the step IV eight to twelve times in sequence to finish coarsening of ribs in the polyurethane foam plate for later use;
s2, preparing slurry
Firstly, weighing raw materials of gypsum, water, bentonite, anhydrous magnesium sulfate and cellulose according to the weight ratio of 360:190:30:40: 1; secondly, adding the weighed anhydrous magnesium sulfate powder into water, and fully stirring to completely dissolve the anhydrous magnesium sulfate in the water; thirdly, fully mixing the weighed gypsum, bentonite and cellulose together, slowly adding the mixture into the anhydrous magnesium sulfate solution by using a spoon, and stirring at a constant speed until the mixed slurry is in a cream state for later use;
s3, grouting
Placing the polyurethane board roughened in the step S1 on a smooth horizontal plate, and uniformly pouring the slurry prepared in the step S2 into the polyurethane board for later use;
s4 preparation of Gypsum-based preform
After the polyurethane foam board is filled with the slurry, the polyurethane foam board is dried in a drying oven at 40 ℃ in a blast environment for 8-10 times, each time lasts for 7-9 minutes, and then the polyurethane foam board is put into a high-temperature crucible resistance furnace for roasting, wherein the temperature rise curve of the roasting is as follows: the temperature is 20-90 ℃, the heating speed is 3.5 ℃/min, the heating time is 20min, and the temperature is kept at 90 ℃ for 1 h; the temperature is 90-240 ℃, the heating speed is 10 ℃/min, the heating time is 15min, and the temperature is maintained for 1h at 240 ℃; the temperature is 240-360 ℃, the temperature rising speed is 10 ℃/min, and the heating time is 12 min; the temperature is 360-460 ℃, the heating rate is 10 ℃/h, the heating time is 10min, and the temperature is maintained for 1h at 460 ℃; the temperature is 460-580 ℃, the heating rate is 10 ℃/min, the heating time is 12min, and the temperature is maintained at 580 ℃ for 1 h; 580-720 ℃, the heating rate is 10 ℃/h, the heating time is 14min, the temperature of 720 ℃ is kept for 1h, so that the polyurethane foam board is completely gasified, the roasted product is cooled to room temperature along with the furnace, and the roasted product is taken out from the high-temperature crucible resistance furnace, so that the gypsum type preform is prepared;
s5 pouring molten aluminum
Firstly, placing the gypsum type prefabricated body prepared in the step S4 in a resistance furnace, heating to 400-500 ℃, and then carrying out heat preservation; then pouring molten aluminum liquid into the gypsum mold, covering a sealing cover and vacuumizing to ensure that the gypsum mold is uniformly filled with the molten aluminum liquid; and finally, after the plate is cooled, flushing gypsum with water to prepare the open-cell foamed aluminum profile.
2. The preparation method of the open-cell foam aluminum profile according to claim 1, characterized in that: the slurry material prepared in the step S2 needs to be grouted as soon as possible in the step S3.
3. The preparation method of the open-cell foam aluminum profile according to claim 1, characterized in that: and in the step IV, naturally drying the polyurethane foam board for 2-5 hours according to the size of the polyurethane foam board, and soaking the polyurethane foam board for the next time after the polyurethane foam board is completely dried.
4. The preparation method of the open-cell foam aluminum profile according to claim 1, characterized in that: the polyurethane foam board prepared in the step S1 is used for preparing a polyurethane investment in a foamed aluminum board process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910464013.7A CN110016581B (en) | 2019-05-30 | 2019-05-30 | Preparation method of open-cell foamed aluminum pore section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910464013.7A CN110016581B (en) | 2019-05-30 | 2019-05-30 | Preparation method of open-cell foamed aluminum pore section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110016581A CN110016581A (en) | 2019-07-16 |
| CN110016581B true CN110016581B (en) | 2021-03-16 |
Family
ID=67194548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910464013.7A Active CN110016581B (en) | 2019-05-30 | 2019-05-30 | Preparation method of open-cell foamed aluminum pore section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110016581B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116213724B (en) * | 2023-02-23 | 2023-12-22 | 廊坊市正永泡沫制品有限公司 | Forming process and equipment for foam aluminum plate with through holes |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338140B (en) * | 2018-09-13 | 2020-12-15 | 昆明理工大学 | Layered gradient pore structure aluminum or aluminum alloy foam and preparation method thereof |
-
2019
- 2019-05-30 CN CN201910464013.7A patent/CN110016581B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110016581A (en) | 2019-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104725015B (en) | A kind of ardealite base material imitation wood wall brick and preparation method thereof | |
| CN110016581B (en) | Preparation method of open-cell foamed aluminum pore section | |
| CN105330333B (en) | Environmentally friendly integrated building lightweight assembled composite wall body material and its production technology | |
| CN106348650A (en) | Production technology of resin sand-based water permeable bricks | |
| CN106396732A (en) | High-strength, light-weight and heat-insulation wallboard and production method thereof | |
| CN111635189A (en) | Energy-saving environment-friendly light wallboard and preparation method thereof | |
| CN107574950B (en) | A kind of preparation method for the light composite wall that insulates against sound | |
| CN104086129B (en) | Hollow brick and preparation method thereof | |
| CN104193247A (en) | Internal partition wall light-weight wallboard and processing method thereof | |
| CN103058703A (en) | High-performance composite material heat-insulting board and preparation method thereof | |
| CN111153641A (en) | Method for preparing high-strength heat-insulation building block from graphite tailings | |
| CN103086658B (en) | Production method of three-dimensional skeleton composite board for building | |
| CN109650944A (en) | A kind of copper tailing foamed ceramic insulation board and preparation method thereof | |
| CN110451916A (en) | A kind of expanded perlite light thermal insulation decoration integrated board and preparation method thereof | |
| CN103912087A (en) | Heat insulation, decoration and enclosure integrated external curtain wall and production process thereof | |
| CN104129964B (en) | The light porous packing material of steam-pressing aero-concrete type | |
| CN107263672B (en) | A kind of preparation method of cracking resistance sound-proof lightweight wall | |
| CN112440368A (en) | Method for preparing high-strength light gypsum block by using phosphogypsum | |
| CN107056176A (en) | A kind of novel energy saving thermal insulation material and preparation method thereof | |
| CN103288380B (en) | Sandstone cultural brick manufacture craft | |
| JPS5836965A (en) | Improved lightweight aggregate and manufacture | |
| CN113024223B (en) | Ultrathin flexible cement decorative plate and preparation method thereof | |
| CN109678444B (en) | Preparation method of desulfurized gypsum external wall self-insulation building block | |
| CN102875193B (en) | Preparation method of porous lightweight heat insulation green brick body | |
| CN107285724A (en) | A kind of preparation method of wall decoration plasterboard |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |