CN2569949Y - Magnesium alloy low-pressure die-casting machine which is convenient for dismounting and cleaning - Google Patents
Magnesium alloy low-pressure die-casting machine which is convenient for dismounting and cleaning Download PDFInfo
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- CN2569949Y CN2569949Y CN 02279478 CN02279478U CN2569949Y CN 2569949 Y CN2569949 Y CN 2569949Y CN 02279478 CN02279478 CN 02279478 CN 02279478 U CN02279478 U CN 02279478U CN 2569949 Y CN2569949 Y CN 2569949Y
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Abstract
The utility model discloses a magnesium alloy low-pressure casting machine which is convenient for dismounting and cleaning. A main member is composed of a holding furnace, a crucible, a riser tube, a mold, a low-pressure casting host machine and a pneumatic control system, wherein, the mold comprises a casting mold and a sprue sleeve. The utility model has the constructional characteristics that the connecting body of a pneumatic pump and the riser tube is hung on a flat plate of the low-pressure casting host machine by a hanging and clamping structure; the front end of the riser tube which is connected with the pneumatic pump into a whole is provided with a flange on a bayonet, which can be hung on the flat plate of the low-pressure casting host machine. Because the special design of the riser tube-pump hanging and clamping is adopted, the daily operation of the magnesium alloy low-pressure casting machine can become very easy; the structure makes installation very reliable and convenient and make the installation conform to the requirement of the production technology of magnesium alloy low-pressure casting; the requirements of reliability, frequent disassembly, frequent assembly and cleaning can be met. The utility model is also used for the low-pressure casting of aluminium alloys. The utility model has the advantages of simple design, convenient operation, low production cost, high productivity and superior safety performance; the quality of low-pressure casting parts can be greatly improved.
Description
Technical field:
The utility model belongs to a kind of air injection machine, especially belongs to a kind of magnesium alloy low-pressure casting machine of easy disassembly cleaning.
Background technology:
Abroad, in early in the twentieth century beginning one's study and using low pressure casting, the same period, the E.H.Lake of Britain registered first low pressure casting patent, be mainly used in the casting of babbit, the Frenchman has formulated the plan that is used for aluminium alloy and copper alloy, and has at first obtained applying in aluminium alloy casting production.After the World War II outburst, Britain extensively adopts the light-alloy part of the higher aero-engine of low pressure casting technology production requirement, and air injection machine is widely used in auto industry, electric machine industry, universal machine, textile machine, instrument and commercial product field subsequently.The production of air injection machine has at present realized specialized production.The design of air injection machine that is used in low-melting-point metal or alloy now is substantially based on a kind of identical principle: the gas that feeds compression in the sealing crucible of alloy liquid is housed, the pressure of gas acts on the alloy liquid level of the cast temperature that keeps certain, under lower mold filling pressure, alloy along the stalk that communicates with casting mold through runner, casting mold cast gate, reposefully be full of die cavity after, increase pressure, make the alloy liquid solidification and crystallization under higher pressure in the die cavity; Gas release in the crucible then, the liquid metal of ot-yet-hardened falls back in the crucible under the effect of gravity in the stalk.Carry out next one circulation after taking out foundry goods.
The low pressure casting of magnesium alloy is not both very easily oxidation of magnesium alloy, burning even blast with the maximum of the low pressure casting of other alloy.Therefore the low pressure casting of magnesium alloy must meet the characteristics of magnesium alloy, especially prevents the oxidation, burning of magnesium alloy, will prevent that magnesium alloy from blasting especially.
Conventional low pressure casting, the method that the crucible sealing is exerted pressure has following shortcoming: the interpolation of molten metal, the sealing of crucible and unlatching and cleaning operation quite bother, consuming time; " tripe rises " phenomenon can take place through exerting pressure repeatedly in crucible, and this phenomenon reduces the service life of crucible greatly; For resembling the such combustible metal of magnesium alloy, " tripe rises " may cause serious leakage magnesium security incident, and liquid magnesium alloy leaks as the stove inner chamber in the crucible, can cause heavy explosion usually.For preventing the generation of this type of major accident, exerting pressure simultaneously in the crucible outside of being everlasting, so that the crucible external and internal pressure is equal, prevents that crucible from breaking, and will make die casting machine become complicated more like this, and the control of pressure and adjusting also become very difficult; Because the capacity of crucible is generally bigger, consumption gas is more during pressurization, makes that air feed equipment increases, the air feed cost increases; If foundry goods requires higher freezing pressure, the crucible of the big volume of high temperature is difficult to realize, otherwise safety problem becomes very serious.Be mingled with because magnesium alloy generates easily, therefore do not carry out refining, insulation usually simultaneously in same crucible, the dismounting of frequent crucible cover makes operation very complicated.The oxidation that liquid magnesium alloy falls to causing in stalk during release is carried out repeatedly, can generate a large amount of oxide skin in stalk, influences the carrying out that produces, and also may cause the oxide inclusion of foundry goods.This shows that present existing air injection machine can not be applicable to the low pressure casting of magnesium alloy well.
Summary of the invention:
The purpose of this utility model provides a kind of air injection machine that pulsometer is conjuncted with stalk and can for convenience detachly be connected with the air injection machine flat board that makes.The purpose of this utility model is to realize like this, the magnesium alloy low-pressure casting machine of described easy disassembly cleaning, main member is made of holding furnace, crucible, stalk, mould and low pressure casting main frame and pneumatic control system, mould comprises casting mold and sprue bush, and its design feature is that pulsometer and the conjuncted employing of the stalk structure that hangs tag hangs on the low pressure casting main frame flat board.The purpose of this utility model also can be achieved through the following technical solutions, the magnesium alloy low-pressure casting machine of described easy disassembly cleaning, and its characteristics are for being shaped on flange on the bayonet socket that can hang over low pressure casting main frame flat board with the conjuncted stalk front end of pulsometer.The magnesium alloy low-pressure casting machine of described easy disassembly cleaning, its characteristics are that the holding furnace bottom is provided with wheel and elevating mechanism.The magnesium alloy low-pressure casting machine of described easy disassembly cleaning, its characteristics hang on the bayonet socket of low pressure casting main frame flat board by the refractory seals pad for the flange that the stalk front end is shaped on.The magnesium alloy low-pressure casting machine of described easy disassembly cleaning, its characteristics are the stalk cover having heaters below low pressure casting main frame flat board.Structure hangs on the air injection machine flat board the utility model because pulsometer and the conjuncted employing of stalk hang tag, generally be to be shaped on hook on the bayonet socket that can hang over the air injection machine flat board with the conjuncted stalk front end of pulsometer, the hook that the stalk front end is shaped on hangs on the bayonet socket of air injection machine flat board.Thereby have simplicity of design, easy to operate, producing cost is low, productivity ratio is high, security performance is good, and the quality of low pressure casting part is increased substantially.The utility model carries out multiple magnesium alloy low-pressure casting part experiment, and operations is functional, index up to specification.Owing to taked special stalk---the pump design that hangs tag, make the air injection machine regular job of magnesium alloy become very easy, this structure can make installation very reliable and easy, make it to meet the manufacturing technique requirent of magnesium alloy low-pressure casting, both required reliably, requirement can be satisfied the requirement of frequent dismounting, cleaning again.Magnesium alloy low-pressure casting machine performance of the present utility model will obviously surpass other design.The utility model also is used for the low pressure casting of aluminium alloy.
Description of drawings:
Fig. 1 is a pulsometer structural representation of the present utility model.
Fig. 2 is a structural representation of protecting compression ring in throat's arranged outside of stalk of the present utility model.
Fig. 3 is a structural representation of the present utility model.
Fig. 4 puts in the interior structural representation of bayonet socket that low pressure casting main frame flat board is provided with for stalk front end of the present utility model.
Fig. 5 hangs over structural representation on the bayonet socket that low pressure casting main frame flat board is provided with for stalk front end of the present utility model.
The specific embodiment:
Below in conjunction with accompanying drawing the utility model is elaborated:
As Fig. 1, Fig. 2, shown in Figure 3, novel air injection machine of the present utility model mainly is made of holding furnace 20, crucible 19, stalk 5, wheel 7, elevating mechanism 8 and low pressure casting main frame, design feature replaces exerting pressure in traditional sealed crucible for adopting the pulsometer be dipped in the normal pressure liquid magnesium alloy to exert pressure, pulsometer drive molten metal along stalk 5 to casting mold filling, supercharging, pressurize; Second, stalk is fixed on the pulsometer and is deep into the top, bottom of pulsometer inner chamber, pulsometer is provided with normal opening one-way valve, when stalk is dipped in molten metal, molten metal enters pulsometer automatically, pulsometer inner chamber top has pipeline to link to each other with pneumatic control system, during inflation, gas pressure acts on liquid level on the inner chamber of pulsometer, and normal opening one-way valve cuts out, molten metal along stalk to casting mold filling, supercharging, pressurize, after release, the not solidifying liq in the stalk falls, and normal opening one-way valve is opened, molten metal in the crucible enters pulsometer, for next one circulation is prepared.The 3rd, according to the size of alloy species, foundry goods, to the requirement of mold filling pressure, the replaceable different material of pulsometer, different volumes, different thickness of shell.The 4th, pulsometer and stalk are welded into one, and also can connect with knock-down form with multi-form.Pulsometer is connected with the low pressure casting main frame with the mode that the conjuncted usefulness of stalk hangs tag and dismantles, thereby realizes the very easy overall separation that makes crucible furnace with the low pressure casting main frame, makes operation greatly simplify and connects reliably.The 5th, make the liquid magnesium alloy in the stalk oxidized for preventing release, at throat's arranged outside protection compression ring of stalk, the inert gas of this protection compression ring is sucked by the negative pressure in the stalk when the pump release, thereby prevents the oxidation of liquid magnesium alloy effectively.In the air injection machine production process, liquid metal filling, supercharging and pressurize are done driving force by pulsometer independently, and crucible is in atmospheric pressure state in casting process.Because pulsometer can manufacture withstand voltage higher, to adapt to the magnesium alloy needs reach the tendency that reduces foundry goods shrinkage porosite, hot tearing by raising liquid metal filling, supercharging and dwell pressure requirement, the novel magnesium alloy air injection machine of the utility model design, maximum working pressure (MWP) can reach 0.3～0.8MPa, and general air injection machine is difficult to reach level like this.The structure of pulsometer comprises pump case 1, one-way cock and air inlet pipe 4 as shown in Figure 1, and one-way cock comprises check valve float 2, valve seat 6 and spacing 3, check valve float 2 be designed to normally open and under spacing 3 effect not away from valve seat 6; Pump case 1 inner chamber top has air inlet pipe 4 to link to each other with pneumatic control system.When gas did not enter, molten metal made check valve float 2 float from valve seat under the static pressure effect, and under spacing 3 effect not away from valve seat 6, molten metal just enters pump case 1 inner chamber.When beginning to fill type, gas enters pump chamber with pressure and the flow of adjusting from air inlet pipe, check valve float 2 causes the one-way cock closure with valve seat 6 contacts under the effect of fluid, this moment, the molten metal of pressurized entered stalk 5, filled type, supercharging and pressurize according to what molten metal was finished in the variation of air pressure subsequently.After pressurize finished, pump case 1 intracavity gas was released, under the effect of the static pressure of molten metal, and check valve float 2 come-ups, one-way cock is opened, and not solidified metal falls back in the pump chamber in the stalk.Treat behind the certain hour interval, to carry out next one circulation.Pulsometer and stalk welding join together, and stalk also can be made segmented, so that different situations adopt respectively.As shown in Figure 3, the formula structure that hangs tag is adopted in the installation of pulsometer and low pressure casting main frame flat board, and this structure can make installation very reliable and easy, makes it to meet the manufacturing technique requirent of magnesium alloy low-pressure casting, both required reliably, requirement can be satisfied the requirement of frequent dismounting, cleaning again; Stalk cover having heaters 12 below low pressure casting main frame flat board 10.The flange 9 that wheel 7 that is provided with by mobile holding furnace 20 bottoms and elevating mechanism 8 make the stalk front end puts in the bayonet socket 11 that low pressure casting main frame flat board 10 is provided with, see shown in Figure 4, when stalk front end flange 9 puts in the bayonet socket 11 on the low pressure casting main frame flat board, the flange 9 that wheel 7 that is provided with bottom mobile holding furnace and elevating mechanism 8 make stalk hangs on the bayonet socket 11 of low pressure casting main frame flat board, sees shown in Figure 5.Stalk adopts the stalk of two-period form, the flange 9 of stalk upper end by refractory seals pad 13 and low pressure casting main frame flat board 10 closely cooperate see shown in Figure 2.As shown in Figure 2, the throat at stalk adopts the molten metal backflow to fall to inflating anti-oxidation technology.Promptly when release, throat at stalk will have the top that the gas that prevents the liquid magnesium alloy oxidative function sucks the whereabouts liquid magnesium alloy of stalk by particular design, when being refluxed, molten metal obtains the protection of gas, avoid the generation of oxide skin, thereby prevent or reduce the generation and the gathering of stalk oxide skin of foundry goods oxide inclusion; Concrete structure can center on sprue bush 14 and stalk mouth 15 and can seal up sprue bush and the protection compression ring sealing ring 16 of stalk mouth for the throat's arranged outside at stalk 5 has; this protection compression ring sealing ring 16 is provided with inert gas access tube 17; protection compression ring sealing ring 16 is located between casting mold 18 bottom surfaces and the low pressure casting main frame flat board 10 and ring-type surrounds and can seal up sprue bush and stalk mouth 15, and protection compression ring sealing ring adopts high-temperature resistant seal ring to make.The inert gas of this protection compression ring is sucked by the negative pressure in the stalk when the pump release, thereby prevents the oxidation of liquid magnesium alloy effectively.
Example one of the present utility model:
Magnesium alloy medium size (wheel hub) part air injection machine, pulsometer employing wall thickness is the jessop welding more than 8 millimeters, volume is about 10 liters, the top of pump is that jessop links to each other with argon gas source more than 20 millimeters with internal diameter, the check valve float 2 of check valve (has pore for ducted body, prevent from that when gases are heated, they expand in the ducted body and can't release to set off an explosion), apparent specific volume is 1.2 gram/cubic centimetres, the valve plug of check valve also can be designed to the entity light weight, opens by the static pressure of liquid magnesium alloy.Pulsometer and stalk can be mentioned together with one of mold base plate with the core-pulling mechanism of air injection machine, and production shows that the production process that makes magnesium alloy low pressure make wheel hub is simplified, and the wheel hub metallurgical quality significantly improves.
Example two:
Magnesium alloy smallclothes air injection machine, the air injection machine commonly used of die casting body and two die sinkings (do not have mechanical core-pulling mechanism, form core cavity with husky core usually) is identical, and pulsometer and stalk can be with manually mentioning to clear up operations such as pump, stalk and crucible.
Example three:
The utility model also is used for the low pressure casting of aluminium alloy, and above-mentioned advantage is shown equally.
Claims (5)
1, a kind of magnesium alloy low-pressure casting machine of easy disassembly cleaning, main member is made of holding furnace (20), crucible (19), stalk (5), mould and low pressure casting main frame and pneumatic control system, mould comprises casting mold (18) and sprue bush (14), it is characterized in that the conjuncted employing of pulsometer and stalk (5) structure that hangs tag hangs on the low pressure casting main frame flat board (10).
2, the magnesium alloy low-pressure casting machine of easy disassembly cleaning according to claim 1 is characterized in that the stalk conjuncted with pulsometer (5) front end is shaped on the flange (9) on the bayonet socket (11) that can hang over low pressure casting main frame flat board.
3, the magnesium alloy low-pressure casting machine of easy disassembly cleaning according to claim 1 and 2 is characterized in that holding furnace (20) bottom is provided with wheel (7) and elevating mechanism (8).
4, the magnesium alloy low-pressure casting machine of easy disassembly cleaning according to claim 2 is characterized in that the flange (9) that stalk (5) front end is shaped on hangs on the bayonet socket (11) of low pressure casting main frame flat board by refractory seals pad (13).
5, the magnesium alloy low-pressure casting machine of easy disassembly cleaning according to claim 2 is characterized in that stalk (5) the cover having heaters (12) in the below of low pressure casting main frame flat board (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02279478 CN2569949Y (en) | 2002-09-30 | 2002-09-30 | Magnesium alloy low-pressure die-casting machine which is convenient for dismounting and cleaning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02279478 CN2569949Y (en) | 2002-09-30 | 2002-09-30 | Magnesium alloy low-pressure die-casting machine which is convenient for dismounting and cleaning |
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| Publication Number | Publication Date |
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| CN2569949Y true CN2569949Y (en) | 2003-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02279478 Expired - Fee Related CN2569949Y (en) | 2002-09-30 | 2002-09-30 | Magnesium alloy low-pressure die-casting machine which is convenient for dismounting and cleaning |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527994A (en) * | 2012-03-07 | 2012-07-04 | 威海万丰镁业科技发展有限公司 | Low-pressure casting device |
| CN102962433A (en) * | 2012-12-06 | 2013-03-13 | 淄博宏泰防腐有限公司 | Magnesium alloy low-pressure casting equipment |
| CN103978187A (en) * | 2014-05-06 | 2014-08-13 | 西北工业大学 | Device and method for counter-gravity casting of solidification process controlled titanium-based alloy |
| CN107096903A (en) * | 2017-04-26 | 2017-08-29 | 哈尔滨工业大学 | Antigravity casting stalk detent mechanism |
| CN108097922A (en) * | 2017-12-20 | 2018-06-01 | 西北工业大学 | A kind of metal-base composites vacuum low-pressure casting device and casting method |
-
2002
- 2002-09-30 CN CN 02279478 patent/CN2569949Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527994A (en) * | 2012-03-07 | 2012-07-04 | 威海万丰镁业科技发展有限公司 | Low-pressure casting device |
| WO2013131405A1 (en) * | 2012-03-07 | 2013-09-12 | 威海万丰镁业科技发展有限公司 | Low-pressure casting device |
| CN102962433A (en) * | 2012-12-06 | 2013-03-13 | 淄博宏泰防腐有限公司 | Magnesium alloy low-pressure casting equipment |
| CN103978187A (en) * | 2014-05-06 | 2014-08-13 | 西北工业大学 | Device and method for counter-gravity casting of solidification process controlled titanium-based alloy |
| CN107096903A (en) * | 2017-04-26 | 2017-08-29 | 哈尔滨工业大学 | Antigravity casting stalk detent mechanism |
| CN107096903B (en) * | 2017-04-26 | 2019-10-22 | 哈尔滨工业大学 | Antigravity casting stalk positioning mechanism |
| CN108097922A (en) * | 2017-12-20 | 2018-06-01 | 西北工业大学 | A kind of metal-base composites vacuum low-pressure casting device and casting method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |