CN104084570B - Vacuum liquid phase air pressure dipping quantitative injection device - Google Patents
Vacuum liquid phase air pressure dipping quantitative injection device Download PDFInfo
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- CN104084570B CN104084570B CN201410361869.9A CN201410361869A CN104084570B CN 104084570 B CN104084570 B CN 104084570B CN 201410361869 A CN201410361869 A CN 201410361869A CN 104084570 B CN104084570 B CN 104084570B
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Abstract
The invention discloses a kind of vacuum liquid phase air pressure dipping quantitative injection device.Described material injecting device has crucible; One cylinder body is set in described crucible, the wall of this cylinder body offers from top to bottom inlet, lower liquid outlet and lower adjustment mouth; The lower liquid outlet of described cylinder body is connected with a tube connector, and one end that tube connector is connected with the lower liquid outlet of cylinder body is lower than its other end; Described cylinder body is communicated with crucible with lower adjustment mouth by upper inlet, described cylinder body is built with the upper piston be connected with upper piston pipe and the lower piston be connected with lower piston rod, this upper piston is used for opening or close upper inlet, and this lower piston is used for opening or closing lower liquid outlet and lower adjustment mouth.The present invention makes the melting in vacuum liquid phase air pressure dipping process and dipping carry out in different bodies of heater respectively, smelting furnace only heats and is incubated, and dipping stove is only incubated and cools, in dipping stove, carry out pressure impregnation, to reduce energy consumption, to reduce aluminum substrate consumption, enhance productivity.
Description
Technical field
The present invention relates to new material technology and mechanical device transport field, be specially a kind of vacuum liquid phase air pressure dipping quantitative injection device.
Background technology
The distinguishing feature of particle reinforced aluminium-based composite material of silicon carbide is that quality is light, and thermal conductivity is high, and thermal coefficient of expansion is lower.Can be widely used in phased-array radar T/R assembly, spacecraft mechanism, great power LED, illuminator, large scale integrated circuit etc.At present, particle reinforced aluminium-based composite material of silicon carbide preparation mainly contains casting, pressure sintering, infiltration method etc., by the combination of casting (negative pressure casting method) with infiltration method (pressure infiltration method), define vacuum liquid phase air pressure infusion process, and become major processes prepared by current aluminum-base silicon carbide composite.At present, this process can not inject quantitative metal liquid under vacuum conditions, can only adopt artificial in advance in furnace charge mode, therefore, smelting furnace can not be separated with dipping stove, causes that dipping body of heater heats again and again, smelting furnace cools again and again, turn increases aluminum substrate consumption while the energy of at substantial, also reduce production efficiency, seriously constrain the expansion of this materials application scope.
Existing high-temperature liquid metal material injecting device is generally magnetic drive pump or atmospheric pressure material feeding mode, and the pressure of sprue outside can not lower than the pressure of material injecting device interior metal liquid, otherwise molten metal just can directly flow out under negative pressure, and institute is for atmospheric pressure environment material feeding.Vacuum liquid phase air pressure Infusion entails quantitatively injects liquid metal under vacuum conditions, silicon carbide substrate is wrapped with the complete submergence of molten metal, and then flood by gas pressurized, molten metal immerses in silicon carbide substrate under the effect of the pressure, in its process, sprue certainly exists the operating mode of the malleation sometimes of negative pressure sometimes, and current material injecting device still can not meet the demands, so, still adopt artificial in advance in furnace charge mode, and complete melting and dipping in same body of heater.
Summary of the invention
Can not be separated with dipping stove the deficiency causing energy waste to overcome existing vacuum liquid phase air pressure infusion process smelting furnace, the present invention aims to provide a kind of vacuum liquid phase air pressure dipping quantitative injection device, this device can reduce energy consumption, reduce aluminum substrate consumption, enhances productivity.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of vacuum liquid phase air pressure dipping quantitative injection device, has one for the crucible of carrying liquid; Its design feature is, arranges a cylinder body in described crucible, the wall of this cylinder body offers from top to bottom inlet, lower liquid outlet and lower adjustment mouth; The lower liquid outlet of described cylinder body is connected for the tube connector be connected with dipping stove with one, and one end that tube connector is connected with the lower liquid outlet of cylinder body is lower than its other end; Described cylinder body is communicated with crucible with lower adjustment mouth by upper inlet, described cylinder body is built with the upper piston be connected with upper piston pipe and the lower piston be connected with lower piston rod, this lower piston rod is through described upper piston pipe and upper piston, this upper piston is used for opening or close upper inlet along its sidewall during movement of cylinder block, and this lower piston is used for opening or closing lower liquid outlet and lower adjustment mouth along its sidewall during movement of cylinder block.
Thus, vacuum liquid phase air pressure of the present invention dipping quantitative injection device has and does not realize high-temperature vacuum sealing and positive seal ability by valve, negative pressure quantitative injection can be completed, the height in melting kettle inner metal liquid face can be made not affect molten metal injection capacity, for vacuum liquid phase air pressure dipping provides outside material feeding condition, melting in vacuum liquid phase air pressure dipping process and dipping can be carried out respectively in different bodies of heater, smelting furnace only heats and is incubated, dipping stove is only incubated and cools, and creates condition for adopting metal species impregnation mold.
Be below the technical scheme of further improvement of the present invention:
In order to realize upper piston sidewall better for opening or close the object of upper inlet, described upper inlet is to the distance of lower liquid outlet, be less than the distance bottom lower piston bottom upper piston, but be greater than the distance to lower piston top bottom upper piston, when closing lower liquid outlet to make lower piston, upper inlet is in opening, and when upper piston closes upper inlet, lower liquid outlet is in opening.
In order to realize lower piston sidewall better for opening or close the object of lower liquid outlet and lower adjustment mouth, be greater than the height of lower piston to the distance at lower adjustment mouth top bottom described lower liquid outlet, make lower piston sidewall when closing lower liquid outlet, lower adjustment mouth is in opening.
Control upper piston and lower piston for the ease of independent, described lower piston rod is connected independently servo-drive system respectively with upper piston pipe.
The gap entered between upper piston pipe and lower piston rod by upper adjustment mouth in order to the aluminium liquid ensured in crucible forms fluid-tight, and makes its pressure consistent with the external world, and described upper piston tube wall face has adjustment mouth.
Preferably, described tube connector is gooseneck, thus, after gooseneck is connected with dipping stove sprue, melting in vacuum liquid phase air pressure dipping process and dipping can be carried out respectively in different bodies of heater, smelting furnace only heats and is incubated, and dipping stove is only incubated and cools, in dipping stove, carry out pressure impregnation.
Preferably, described upper piston, lower piston, cylinder body, lower piston rod, upper piston pipe, tube connector, crucible all adopt ceramic base material to make.
Described cylinder body top is hatch frame.
Above structure, during work material feeding, the capacity of each injection molten metal is only equal with the variable quantity of the spatial volume between upper piston with lower piston, namely equals predetermined volumes; Upper piston and lower piston all can be driven by servo-drive system, and carry out self-movement or aggregate motion; Wherein, upper piston, lower piston, cylinder body, lower piston rod, upper piston pipe, gooseneck, crucible all adopt refractory ceramics base material matter, and the gooseneck mouth of pipe is connected with the inlet of dipping stove.
Compared with prior art, the invention has the beneficial effects as follows:
When vacuum impregnation stove is in vacuumizing phase, lower piston closes lower liquid outlet, liquid phase air pressure dipping quantitative injection device lower liquid outlet outside is negative pressure, the pressure of lower piston top and lower piston lower metal liquid is all higher than the pressure of lower liquid outlet, in lower piston top, lower piston bottom and gooseneck, molten metal is under capillary effect, can not enter the gap of piston side and inboard wall of cylinder block, in gooseneck, molten metal keeps elemental height, molten metal negative-pressure sealing.
After vacuum reaches predetermined value, upper and lower piston moves upward simultaneously, in motion process, lower liquid outlet is blocked all the time in lower piston side, when upper piston lower motion inlet position upper to unlatching, molten metal in cylinder body is communicated with the molten metal in crucible by upper inlet, now, lower piston stop motion, upper piston continues the certain distance that moves upward, be extracted in cylinder body by the molten metal of predetermined volumes in crucible, in gooseneck, metal bath surface still keeps elemental height.
Then, upper and lower piston is kept at a distance and is moved downward together, instantly when upper piston area moves to below lower liquid outlet, lower liquid outlet is opened, and the molten metal of upper and lower piston space communicates with the molten metal of gooseneck, now, lower piston stop motion, upper piston continues to move downward certain distance, by the molten metal of predetermined volumes press-in gooseneck (in dipping stove), carries out the material feeding under dipping stove vacuum environment; After completing material feeding, upper and lower piston moves upward simultaneously, and in motion process, lower liquid outlet is blocked gradually in lower piston side, and then keep blocking lower liquid outlet state, in gooseneck, metal bath surface keeps elemental height.
On upper and lower piston is blocked respectively when inlet and lower liquid outlet, carry out gas pressure dipping, in dipping process, the lower liquid outlet outside of liquid phase air pressure dipping quantitative injection device is malleation, and in gooseneck, the pressure of molten metal is higher than the pressure of lower piston top and lower piston lower metal liquid, and in gooseneck, molten metal is under capillary effect, the gap of piston side and inboard wall of cylinder block can not be entered, in gooseneck, metal bath surface keeps elemental height, now, and molten metal positive seal.
Dipping completes, and after composite cools down terminates, dipping stove pressure release, takes out aluminum-base silicon carbide composite, then is placed in by new SiC substrate in dipping stove, and dipping stove starts a new round and vacuumizes-flood-process that cools, moves in circles according to this.In whole material feeding, dipping, cooling procedure, in gooseneck, metal bath surface remains elemental height, not by the impact of crucible inner metal liquid face height.
Finally make the melting in vacuum liquid phase air pressure dipping process and dipping carry out in different bodies of heater respectively, smelting furnace only heats and be incubated, floods stove and is only incubated and cools, thus reduce energy consumption, decrease aluminum substrate consumption, improve production efficiency.
Below in conjunction with drawings and Examples, the present invention is further elaborated.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of one embodiment of the invention.
In the drawings
1-cylinder body; 2-crucible; 3-upper piston; 4-lower piston; 5-upper piston pipe; 6-lower piston rod; The upper inlet of 7-; 8-lower liquid outlet; Mouth is regulated under 9-; 10-regulates mouth; 11-servo-drive system; 12-gooseneck; The 13-gooseneck mouth of pipe; 14-aluminum alloy melt.
Detailed description of the invention
A kind of vacuum liquid phase air pressure dipping quantitative injection device, as shown in Figure 1, primarily of compositions such as servo-drive system 11, upper piston 3, lower piston 4, cylinder body 1, lower piston rod 6, upper piston pipe 5, gooseneck 12, crucibles 2, inlet 7, lower liquid outlet 8, lower adjustment mouth 9 on cylinder wall has, upper piston tube wall there is upper adjustment mouth 10, wherein lower liquid outlet 8 communicates with gooseneck 12, and upper piston 3, lower piston 4, cylinder body 1, lower piston rod 6, upper piston pipe 5, gooseneck 12, crucible 2 etc. adopt refractory ceramics base material matter.
Adopt double-piston with cylinder combined structure design, inlet 7, lower liquid outlet 8 and lower adjustment mouth 9 on the upper, middle and lower of cylinder body 1 has, open with upper piston 3 sidewall or close upper inlet 7, open with lower piston 4 sidewall or close lower liquid outlet 8, in the motion process of upper piston 3 and lower piston 4, in the top and bottom of upper piston 3 and lower piston 4 and gooseneck 12, all there is metal liquid;
On opening during inlet 7, upper piston 3 bottom is higher than upper inlet 7, and upper piston 3 continues to move upward, and sucks the molten metal of predetermined volumes from upper inlet 7.Move upward in the process of (suction molten metal) at upper piston 3, lower piston 4 closes lower liquid outlet 8 all the time by sidewall; When opening lower liquid outlet 8, lower piston 4 top is lower than lower liquid outlet 8, and upper piston 3 moves downward, and molten metal is discharged from lower liquid outlet 8;
When lower liquid outlet 8 outside is negative pressure, the gap of piston side and cylinder body 1 inwall, the pressure of lower piston 4 top and lower piston 4 lower metal liquid is higher than external pressure, molten metal can not enter gap under capillary effect, the molten metal of lower piston 4 top and lower piston 4 bottom seals, and makes dipping stove be in vacuum state;
When lower liquid outlet 8 outside is malleation, the gap of piston side and cylinder body 1 inwall, the pressure in lower piston 4 side gooseneck 12 is higher than in-cylinder pressure, and molten metal can not enter gap under capillary effect, sealed by the molten metal in gooseneck 12, make dipping stove be in vacuum state;
Cylinder body 1 top is hatch frame, casing wall bottom arranges lower adjustment mouth 9, make the liquid in upper and lower chamber in cylinder not affect moving up and down of piston group, and in whole material feeding, dipping, pressurization, cooling procedure, in gooseneck 12, metal bath surface remain elemental height.
After gooseneck 12 is connected with dipping stove sprue by the present embodiment, melting in vacuum liquid phase air pressure dipping process and dipping can be carried out respectively in different bodies of heater, smelting furnace only heats and is incubated, dipping stove is only incubated and cools, have and reduce energy consumption, minimizing aluminum substrate consumption, the effect of enhancing productivity.
The content that above-described embodiment is illustrated should be understood to these embodiments only for being illustrated more clearly in the present invention, and be not used in and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims limited range.
Claims (8)
1. a vacuum liquid phase air pressure dipping quantitative injection device, has one for the crucible (2) of carrying liquid, it is characterized in that, a cylinder body (1) is set in described crucible (2), the wall of this cylinder body (1) offers from top to bottom inlet (7), lower liquid outlet (8) and lower adjustment mouth (9), the lower liquid outlet (8) of described cylinder body (1) is connected for the tube connector be connected with dipping stove with one, and one end that tube connector is connected with the lower liquid outlet (8) of cylinder body (1) is lower than its other end, described cylinder body (1) is communicated with crucible (2) with lower adjustment mouth (9) by upper inlet (7), described cylinder body (1) is built with the upper piston (3) be connected with upper piston pipe (5) and the lower piston (4) be connected with lower piston rod (6), this lower piston rod (6) is through described upper piston pipe (5) and upper piston (3), when this upper piston (3) moves along cylinder body (1), its sidewall is used for opening or close upper inlet (7), when this lower piston (4) moves along cylinder body (1), its sidewall is used for opening or closing lower liquid outlet (8) and lower adjustment mouth (9).
2. vacuum liquid phase air pressure dipping quantitative injection device according to claim 1, it is characterized in that, described upper inlet (7) is to the distance of lower liquid outlet (8), be less than the distance of upper piston (3) bottom to lower piston (4) bottom, but be greater than the distance of upper piston (3) bottom to lower piston (4) top, when closing lower liquid outlet (8) to make lower piston (4), upper inlet (7) is in opening, and in upper piston (3) closedown time inlet (7), lower liquid outlet (8) is in opening.
3. vacuum liquid phase air pressure dipping quantitative injection device according to claim 1, it is characterized in that, be greater than the height of lower piston (4) to the distance at lower adjustment mouth (9) top bottom described lower liquid outlet (8), make lower piston (4) sidewall when closing lower liquid outlet (8), lower adjustment mouth (9) is in opening.
4., according to the vacuum liquid phase air pressure dipping quantitative injection device one of claim 1 ~ 3 Suo Shu, it is characterized in that, described lower piston rod (6) is connected independently servo-drive system respectively with upper piston pipe (5).
5., according to the vacuum liquid phase air pressure dipping quantitative injection device one of claim 1 ~ 3 Suo Shu, it is characterized in that, described upper piston pipe (5) wall has adjustment mouth (10).
6., according to the vacuum liquid phase air pressure dipping quantitative injection device one of claim 1 ~ 3 Suo Shu, it is characterized in that, described tube connector is gooseneck (12).
7. according to the vacuum liquid phase air pressure dipping quantitative injection device one of claim 1 ~ 3 Suo Shu, it is characterized in that, described upper piston (3), lower piston (4), cylinder body (1), lower piston rod (6), upper piston pipe (5), tube connector, crucible (2) all adopt ceramic base material to make.
8., according to the vacuum liquid phase air pressure dipping quantitative injection device one of claim 1 ~ 3 Suo Shu, it is characterized in that, described cylinder body (1) top is hatch frame.
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| CN201410361869.9A CN104084570B (en) | 2014-07-28 | 2014-07-28 | Vacuum liquid phase air pressure dipping quantitative injection device |
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| CN201410361869.9A CN104084570B (en) | 2014-07-28 | 2014-07-28 | Vacuum liquid phase air pressure dipping quantitative injection device |
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| CN108088255A (en) * | 2017-12-14 | 2018-05-29 | 湖南顶立科技有限公司 | A kind of dipping furnace structure of stove and pressure impregnation stove |
| CN109175313A (en) * | 2018-10-30 | 2019-01-11 | 天能电池(芜湖)有限公司 | A kind of weight control method of cast molding |
| CN110448953A (en) * | 2019-06-27 | 2019-11-15 | 广东工业大学 | A kind of garbage degradation experimental provision |
| CN114628168B (en) * | 2020-12-12 | 2023-06-30 | 丰宾电子科技股份有限公司 | Quantitative vacuum impregnation mechanism |
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