CN105935760A - Vacuum degassing device for metal-mould low-pressure casting and metal-mould low-pressure casting technique - Google Patents
Vacuum degassing device for metal-mould low-pressure casting and metal-mould low-pressure casting technique Download PDFInfo
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- CN105935760A CN105935760A CN201610132845.5A CN201610132845A CN105935760A CN 105935760 A CN105935760 A CN 105935760A CN 201610132845 A CN201610132845 A CN 201610132845A CN 105935760 A CN105935760 A CN 105935760A
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- casting
- metal
- pressure casting
- crucible
- mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/15—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using vacuum
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a vacuum degassing device for metal-mould low-pressure casting. The vacuum degassing device comprises a furnace body, wherein a casting mould is arranged in the furnace body; a crucible is arranged below the casting mould; a riser tube is arranged in the crucible; a heat preserving furnace is arranged outside the crucible; a pressure relief opening is formed in the upper end of the crucible, and communicates with one end of a cooling device; and the other end of the cooling device communicates with a vacuum pump. The invention further provides a metal-mould low-pressure casting technique which is used for realizing repeated fast refining of aluminum liquid in a low-pressure casting process, so as to ensure internal quality and quality stability of a continuous casting, ensure obvious improvement on tensile strength, elongation percentage and rigidity, and greatly improve the production efficiency of metal-mould low-pressure casting. Besides, due to adoption of vacuum degassing, energy consumption and environmental pollution can be reduced.
Description
Technical field
The invention discloses a kind of foundry goods device and casting process, be specifically related to a kind of metal-mold low-pressure casting vacuum degassing device.
Background technology
In recent years, along with the development of national defense industry, military project, Aerial-casting demand are continuously increased, and due to its dimensional accuracy, surface smoothness height, technique relatively simply, this technique is increasingly being widely applied metal low pressure casting in war production at present.
Metal-mold low-pressure casting process route is generally:
Current overwhelming majority low pressure casting factories all use as above process route to produce foundry goods, after an aquatic product of stove aluminum is complete, pull down low pressure mould, are added by aluminum liquid in the crucible of holding furnace at stalk, then join mould continuation production.Minority producer is convenient in order to add aluminum liquid, and crucible type holding furnace makes into bath formula holding furnace, directly can add aluminum liquid from holding furnace side, complete to produce continuously in the case of not dismantling mould.
It is known that the purpose of alloy refining is to remove the gas content in aluminum liquid, reduce the pin hole tendency in casting process.And in low pressure casting process, pin hole grade in the refined rear aluminum liquid of alloy typically can meet the requirements, proceed in holding furnace, waiting the heating of mould, spray paint, join mould, typical time is 3～4 hours, 250 kilograms of a stove aluminum water, vary in size according to product, it is generally required to 4～8 hours, after namely aluminum anodizing is qualified, through the isothermal holding of 7～12 hours.And national Specification: the effective time of alloy refining is 2～3 hours in permanent mold casting, and hereafter in aluminum liquid, gas content has exceeded the requirement of casting qualified products.Heat preserving furnace aluminum liquid surface is especially constantly carried out aerating boosting by low pressure casting process and release processes, the air-breathing of aluminum liquid is even more serious, this will be greatly increased the gas content in alloy, result is that the cast-internal pin hole produced increases, the internal quality of casting, performance are substantially reduced, it is impossible to meet the production requirement of war products high quality casting.
And the crucible type holding furnace that the overwhelming majority uses at present, owing to the aluminum liquid in holding furnace cannot directly be carried out repeating refine by its construction features way aborning, must first pull down mould, open bell, take out the pipe that heats up, refine can be carried out again, this process is got off to be changed the time of expense and is not less than 3 hours, greatly reduces production efficiency.Although and bath formula holding furnace opens bell conveniently, but owing to the general area of bath is relatively big, and having again stalk to keep off in centre, when using argon or refining agent refine, effect does not reaches production requirement.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of metal-mold low-pressure casting vacuum degassing device.
Present invention also offers a kind of metal-mold low-pressure casting technique.
Technical scheme: for solving above-mentioned technical problem, a kind of metal-mold low-pressure casting vacuum degassing device that the present invention provides, including body of heater, casting die it is provided with in body of heater, crucible it is provided with below casting die, stalk it is provided with in crucible, crucible is externally provided with a holding furnace, an air injection machine it is provided with between described casting die and crucible, described air injection machine is provided with a cup, cup is connected with stalk, it is connected with a vacuum cooling unit above described crucible, described vacuum cooling unit includes housing, the cooling copper tube being located in housing and coolant, described cooling copper tube one end connects with air injection machine, the other end is connected with vacuum pump.
Further, described casting die includes mould mo(u)ld top half and mould mo(u)ld bottom half,.
Further, described crucible is built with casting liquid.
Further, described air injection machine is provided with relief port, and cooling copper tube is connected with relief port.
Casting technique based on metal-mold low-pressure casting vacuum degassing device, its casting step is:
S1: alloy melting；
S2: the alloy melting liquid after refined proceeds to refine again in holding furnace, it concretely comprises the following steps:
A, foundry goods after cast is carried out pressurize, release, is not switched on mould, b, cooling tube one end is connected with low die casting machine relief port, the other end connects vacuum pump, and is placed in tank by cooling tube, opens vacuum pump by vacuum degree control 0.13～1.3Kpa, the process time is 10 minutes, c, takes off the connecting tube of air injection machine and cooling tube, opens mould low-pressure casting process routinely and produces continuously.
Beneficial effect: the present invention in terms of existing technologies, has the advantage that
(1) the inventive method is to realizing the repeatedly quickly refine of aluminum liquid in low pressure casting process, it is ensured that continuous casting inherent quality and quality stability.
(2) present invention is in terms of existing technologies, is obviously improved in tensile strength, elongation percentage, hardness, and can be greatly improved the production efficiency of metal-mold low-pressure casting.
(3) vacuum degassing is used, it is possible to reduce energy consumption, alleviate the pollution to environment.
Accompanying drawing explanation
Fig. 1 is that the present invention casts vacuum degassing device structural representation.
Fig. 2 is pressure relief opening structural representation of the present invention.
Wherein: 1-air injection machine；2-crucible；3-holding furnace；4-stalk；5-air injection machine；6-mould mo(u)ld top half；7-mould mo(u)ld bottom half；8-foundry goods；9-casts liquid；10-cup；11-cooling copper tube；12-coolant；13-vacuum pump；14-pressure relief opening.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is further described.
As shown in Figure 1, a kind of metal-mold low-pressure casting vacuum degassing device, including body of heater, casting die it is provided with in body of heater, crucible 2 it is provided with below casting die, stalk 4 it is provided with in crucible 2, crucible 2 is externally provided with a holding furnace 3, an air injection machine 5 it is provided with between described casting die and crucible 2, described air injection machine 5 is provided with a cup 10, cup 10 is connected with stalk 4, it is connected with a vacuum cooling unit above described crucible 2, described vacuum cooling unit includes housing, the cooling copper tube 11 being located in housing and coolant 12, described cooling copper tube 11 one end connects with air injection machine 5, the other end is connected with vacuum pump 13.Described casting die includes mould mo(u)ld top half 6 and mould mo(u)ld bottom half 7, is foundry goods 8 between mould mo(u)ld top half 6 and mould mo(u)ld bottom half 7.Described crucible 2 is built with casting liquid 9.Described air injection machine 1 is provided with relief port 14, and cooling copper tube 4 is connected with relief port 14.
Casting technique based on metal-mold low-pressure casting vacuum degassing device, its casting step is:
S1: alloy melting；
S2: the alloy melting liquid after refined proceeds to refine again in holding furnace, it concretely comprises the following steps:
A, foundry goods after cast is carried out pressurize, release, is not switched on casting die, b, cooling copper tube 11 one end is connected with low die casting machine 1 relief port 14, the other end connects vacuum pump 13, and cooling copper tube 11 is placed in coolant 12, opens vacuum pump by vacuum degree control 0.13～1.3Kpa, the process time is 10 minutes, c, takes off the connecting tube of air injection machine and cooling tube 11, opens mould low-pressure casting process routinely and produces continuously.
Relative with prior art ZL101A-J-T6 (antivacuum) and ZL114A-J-T5 (antivacuum) by the present invention, its performance parameter such as following table:
The above is only the preferred embodiment of the present invention; it is noted that, for those skilled in the art; under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (5)
1. a metal-mold low-pressure casting vacuum degassing device, it is characterised in that: it is provided with foundry goods in including body of heater, body of heater
Be provided with stalk in being provided with crucible, crucible below mould, casting die, crucible is externally provided with a holding furnace, described
Being provided with an air injection machine between casting die and crucible, described air injection machine is provided with a cup, cast gate
Cup is connected with stalk, is connected with a vacuum cooling unit, described vacuum cooling unit bag above described crucible
Including housing, the cooling copper tube being located in housing and coolant, described cooling copper tube one end connects with air injection machine,
The other end is connected with vacuum pump.
Metal-mold low-pressure casting vacuum degassing device the most according to claim 1, it is characterised in that: described foundry goods
Mould includes mould mo(u)ld top half and mould mo(u)ld bottom half.
Metal-mold low-pressure casting vacuum degassing device the most according to claim 1, it is characterised in that: described crucible
Built with casting liquid.
Metal-mold low-pressure casting vacuum degassing device the most according to claim 1, it is characterised in that: described low pressure
Casting machine is provided with relief port, and cooling copper tube is connected with relief port.
5., based on a casting technique for metal-mold low-pressure casting vacuum degassing device described in claim 1, its feature exists
In: its casting step is:
S1: alloy melting；
S2: the alloy melting liquid after refined proceeds to refine again in holding furnace, it concretely comprises the following steps:
A, carries out pressurize, release to the foundry goods after cast, is not switched on casting die, and b, by cooling copper tube one end with low
Die casting machine relief port connects, and the other end connects vacuum pump, and is placed in tank by cooling tube, opens vacuum pump
By vacuum degree control 0.13～1.3Kpa, the process time is 10 minutes, and c takes off air injection machine and cooling
The connecting tube of pipe, opens mould low-pressure casting process routinely and produces continuously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610132845.5A CN105935760A (en) | 2016-03-09 | 2016-03-09 | Vacuum degassing device for metal-mould low-pressure casting and metal-mould low-pressure casting technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610132845.5A CN105935760A (en) | 2016-03-09 | 2016-03-09 | Vacuum degassing device for metal-mould low-pressure casting and metal-mould low-pressure casting technique |
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| Publication Number | Publication Date |
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| CN105935760A true CN105935760A (en) | 2016-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610132845.5A Pending CN105935760A (en) | 2016-03-09 | 2016-03-09 | Vacuum degassing device for metal-mould low-pressure casting and metal-mould low-pressure casting technique |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112941350A (en) * | 2021-01-27 | 2021-06-11 | 浙江旺盛动力机电有限公司 | ZL205A alloy smelting process |
| CN114850453A (en) * | 2022-05-13 | 2022-08-05 | 上海皓越电炉技术有限公司 | Pressure difference impregnation equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0890202A (en) * | 1994-09-14 | 1996-04-09 | Toyota Motor Corp | Vacuum casting metallic mold |
| CN1382542A (en) * | 2002-03-26 | 2002-12-04 | 华中科技大学 | Antigravitational vacuum method and apparatus for asting Mg allor or Al alloy with lost mould |
| CN2764530Y (en) * | 2004-11-09 | 2006-03-15 | 江苏圆通汽车零部件有限责任公司 | Vacuum degassing apparatus for casting solution in low temperature casting machine |
| CN102179498A (en) * | 2011-06-21 | 2011-09-14 | 海门市沪海有色铸造有限公司 | Energy-saving device of liquid rising pipe of low-pressure casting machine |
| CN102398014A (en) * | 2011-11-15 | 2012-04-04 | 上海交通大学 | Casting device of low tension fine grain and method thereof |
| CN103785813A (en) * | 2014-01-07 | 2014-05-14 | 南通宏德机电有限公司 | Vacuum standing degassing and deslagging device of low-pressure casting heat-insulation furnace and deslagging method for vacuum standing degassing and deslagging device |
-
2016
- 2016-03-09 CN CN201610132845.5A patent/CN105935760A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0890202A (en) * | 1994-09-14 | 1996-04-09 | Toyota Motor Corp | Vacuum casting metallic mold |
| CN1382542A (en) * | 2002-03-26 | 2002-12-04 | 华中科技大学 | Antigravitational vacuum method and apparatus for asting Mg allor or Al alloy with lost mould |
| CN2764530Y (en) * | 2004-11-09 | 2006-03-15 | 江苏圆通汽车零部件有限责任公司 | Vacuum degassing apparatus for casting solution in low temperature casting machine |
| CN102179498A (en) * | 2011-06-21 | 2011-09-14 | 海门市沪海有色铸造有限公司 | Energy-saving device of liquid rising pipe of low-pressure casting machine |
| CN102398014A (en) * | 2011-11-15 | 2012-04-04 | 上海交通大学 | Casting device of low tension fine grain and method thereof |
| CN103785813A (en) * | 2014-01-07 | 2014-05-14 | 南通宏德机电有限公司 | Vacuum standing degassing and deslagging device of low-pressure casting heat-insulation furnace and deslagging method for vacuum standing degassing and deslagging device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112941350A (en) * | 2021-01-27 | 2021-06-11 | 浙江旺盛动力机电有限公司 | ZL205A alloy smelting process |
| CN114850453A (en) * | 2022-05-13 | 2022-08-05 | 上海皓越电炉技术有限公司 | Pressure difference impregnation equipment |
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Application publication date: 20160914 |