CN101657282B - Low-pressure casting apparatus, method of inert gas filling and process for manufacturing cast article - Google Patents
Low-pressure casting apparatus, method of inert gas filling and process for manufacturing cast article Download PDFInfo
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- CN101657282B CN101657282B CN200880012074XA CN200880012074A CN101657282B CN 101657282 B CN101657282 B CN 101657282B CN 200880012074X A CN200880012074X A CN 200880012074XA CN 200880012074 A CN200880012074 A CN 200880012074A CN 101657282 B CN101657282 B CN 101657282B
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Abstract
A low-pressure casting apparatus designed to simply communicate a space provided above a molten metal in a pressurization chamber with either a stalk provided vertically from a pouring port of mold or a guide hole connected to the pouring port of mold to thereby allow an inert gas to fill the interior of the stalk or the interior of the guide hole. The low-pressure casting apparatus (100) is designed to pressurize a superior surface of molten metal by an inert gas to thereby fill a mold (7) with the molten metal via a stalk (8) provided vertically from a pouring port of the mold or a guide hole having its one end connected to the pouring port of the mold. The casting apparatus is characterized by having a molten metal retaining chamber (1) for retention of the molten metal; a pressurization chamber (2) provided in a fashion permitting communication with the molten metal retaining chamber via a communication hole (4) while allowing the lower end of the stalk (8) to come thereinside or allowing the other end of the guide hole (21) to be in connection therewith, the pressurization chamber adapted to pressurize the molten metal by an inert gas; an opening/closing valve (5) for opening and closing of the communication hole; detection means (15) for detecting communication between the space provided above the molten metal in the pressurization chamber and either the interior of the stalk or the interior of the guide hole; and inert gas supply means (30) for supplying the inert gas to a superior portion of the pressurization chamber.
Description
Technical field
The present invention relates to a kind of low-pressure casting apparatus, a kind of method and a kind of process for manufacturing cast article to this device inert gas injecting.
Background technology
Traditional low-pressure casting apparatus does not have complicated structure.It is a non-oxidized gas with the air displacement in casting mold, communicating pipe and the maintenance stove efficiently.This device comprises an airtight basically maintenance stove, to the communicating pipe that this maintenance stove provides the device, of non-oxidized gas to be used to be communicated with this a maintenance stove and a casting mold, and one be used for the maintenance furnace side opening of this communicating pipe is switched to a casting position or a casting mold displacement position switching device shifter.At this casting position place, the opening of this communicating pipe is immersed in the motlten metal in this maintenance stove, and at this displacement position place, this opening at least partly is arranged in the top of the motlten metal of this maintenance stove.When this communicating pipe was moved to displacement position, non-oxidized gas was provided to this maintenance stove.Therefore the air in this maintenance stove, communicating pipe and the casting mold is replaced into non-oxidized gas (seeing disclosed Japan Patent No.2000-42715).
Summary of the invention
Yet; Conventional low casting device with said structure has following defective: because will keep air displacement in stove, this communicating pipe and this casting mold to become non-oxidized gas the time at every turn; This maintenance stove all must move up and down, thereby each casting cycle is all longer, and productivity ratio and efficient reduce.And the structure of this low-pressure casting apparatus is more complicated also.In addition, be difficult to guarantee this maintenance furnace top cover and the seal between this communicating pipe.
In order to address the above problem, to the object of the present invention is to provide a kind of low-pressure casting apparatus, a kind of method, and adopt this low-pressure casting apparatus to produce the method for foundry goods to this device injection non-oxidized gas.In the present invention, the space that is formed at the motlten metal top in the compression chamber with are communicated with this communicating pipe or a guide hole so that perhaps inject non-oxidized gas in this guide hole to this communicating pipe.The place, sprue gate of hanging down this communicating pipe and being located at this casting mold, this guide hole then links to each other with this sprue gate.
In order to address the above problem, in this low-pressure casting apparatus of the present invention, utilize inert gas that motlten metal is pressurizeed, make motlten metal be located at guide hole that communicating pipe or an end on this casting-up mouth link to each other with this sprue gate through hanging down and poured into a mould in the casting mold.This low-pressure casting apparatus comprises a motlten metal accommodation chamber, a compression chamber, a switch valve, a sensing device and an inert gas generator.This compression chamber is communicated with this motlten metal accommodation chamber through an intercommunicating pore.This compression chamber is inserted in the bottom of this communicating pipe, and perhaps the other end of this guide hole links to each other with this compression chamber.The other end of this guide hole refers to the relative end of an end that is connected in this place, sprue gate with this guide hole.In this compression chamber, pressurizeed by inert gas in the surface of this motlten metal.The opening and closing of this this intercommunicating pore of switch valve control.The space that this sensing device is used for surveying this motlten metal top, compression chamber whether with are communicated with this communicating pipe or this guide hole.This inert gas generator provides inert gas to the top of this compression chamber.
In having the low-pressure casting apparatus of said structure, this switch valve is opened, to provide from the motlten metal in this motlten metal accommodation chamber to this compression chamber through this intercommunicating pore.Then, this switch valve cuts out this intercommunicating pore to stop to provide motlten metal.Then, this inert gas generator provides inert gas so that this motlten metal is pressurizeed in the compression chamber.So, the motlten metal from this compression chamber is injected in the die cavity of this casting mold through this communicating pipe or this guide hole.After the motlten metal in the die cavity that is injected into this casting mold solidifies, through this switch valve this intercommunicating pore to be opened, the motlten metal in this compression chamber is back in this motlten metal accommodation chamber.The top of this compression chamber and this communicating pipe or this guide hole are communicated with.Therefore the inert gas in this compression chamber flow into should communicating pipe or this guide hole in.Whether this sensing device is surveyed the space that is positioned at motlten metal top in this compression chamber and is communicated with this communicating pipe or this guide hole.The result makes the motlten metal in this communicating pipe or this guide hole avoid contacting with air.
As stated, in the present invention, utilize the surface pressurization of inert gas, motlten metal is injected this casting mold the motlten metal in this compression chamber.After the motlten metal in this casting mold solidifies, open this intercommunicating pore through this switch valve, the motlten metal in this compression chamber is back in this motlten metal accommodation chamber.
This sensing device is set, with the space of surveying the top of motlten metal in this compression chamber whether with are communicated with this communicating pipe or this guide hole.Since in this compression chamber the space of motlten metal top with are communicated with this communicating pipe or this guide hole, so the inert gas in this compression chamber can flow into really should communicating pipe perhaps this guide hole.So the present invention has such beneficial effect:, just avoided forming the oxidized metal on the motlten metal in this communicating pipe or this guide hole because the surface of the motlten metal in this communicating pipe or this guide hole does not contact with air.
Be regarded as quoting in full to the Japanese patent application No.2007-106639 that is filed on April 16th, 2007 and to the quoting of Japanese patent application No.2007-157055 that is filed on June 14th, 2007 among the application to above-mentioned two parts of patent documents.Below will make detailed description, to help to understand better the present invention to the present invention.Yet detailed specification and specific embodiment just to the example description of desirable embodiment of the present invention, only are used to explain the present invention.On the basis that combines detail specifications, to those skilled in the art, all be conspicuous to multiple possible change and the modification that the present invention made.The object of the invention does not lie in disclosing of embodiment.In the change that has been disclosed and revising, those possibly exceed the content of the protection domain of these claims on literal, will constitute a part of the present invention with the form of equivalents.Except explaining in addition or on the literal obviously the situation of contradiction, used article " ", " be somebody's turn to do " and similarly quote and all should be understood that to cover odd number and plural situation in specification and claims.Giving an example of any or all that adopts, perhaps exemplary statement (for example " for example ") only is for the present invention is described better, is not to be used to limit protection scope of the present invention, only if statement is arranged in addition.
Description of drawings
Fig. 1 is the vertical direction sectional view of the low-pressure casting apparatus in the embodiment of the invention one.
Fig. 2 is the operation chart of this low-pressure casting apparatus among Fig. 1.
Fig. 3 is the vertical direction sectional view of another embodiment bottom communicating pipe.
Fig. 4 is the vertical direction sectional view of the low-pressure casting apparatus in the embodiment of the invention two.
Fig. 5 is the vertical direction sectional view of the low-pressure casting apparatus in the embodiment of the invention three.
Fig. 6 is the operation chart of this low-pressure casting apparatus among Fig. 5.
Fig. 7 is the vertical direction sectional view of the low-pressure casting apparatus in the embodiment of the invention four.
The specific embodiment
With reference to accompanying drawing 1-7 four embodiment of this low-pressure casting apparatus among the present invention are elaborated.Described like embodiment one, low-pressure casting apparatus 100 has a liquid level sensor 9 as sensing device.As shown in Figure 1, this low-pressure casting apparatus comprises a motlten metal accommodation chamber 1; One through the compression chamber 2 of inert gas to the motlten metal pressurization; A switch valve 5 that is used to open or close an intercommunicating pore 4, this intercommunicating pore 4 is communicated with motlten metal accommodation chamber 1 and compression chamber 2 through an ancillary chamber 3; An open-topped lid 6 that is used for sealing airtightly compression chamber 2; A vertical communicating pipe 8 of being located at the place, sprue gate of casting mold 7; Be used for surveying the liquid level sensor 9 of the molten metal surface height that is positioned at compression chamber 2; And inert gas generator 30 that is used for providing inert gas to the top of compression chamber 2.This compression chamber 2 is configured to be communicated with motlten metal accommodation chamber 1.This communicating pipe 8 vertically pass lid 6 and get into compression chamber 2.This liquid level sensor 9 passes lid 6 and on it, hangs.This inert gas generator 30 is connected with inert gas supply hole 10 on the lid 6.
In this low-pressure casting apparatus 100, the part of intercommunicating pore 4 is used as valve seat, and the valve body of switch valve 5 is used to open or close this intercommunicating pore 4.Yet, a switch valve with a valve seat and a valve body also can be set on intercommunicating pore 4 control its opening and closing.
In this inert gas generator 30, an inert gas air accumulator 32 is communicated with inert gas supply hole 10 through a switch valve 34 and conduit 36.A steam vent 40 is arranged at the top of this compression chamber 2, be used for discharging inert gas so that the pressure drop of this motlten metal superjacent air space to atmospheric pressure.A magnetic valve 42 is communicated with this steam vent 40.Be respectively applied for the liquid level sensor 12 and 13 of surveying the motlten metal liquid level upper and lower bound be positioned at motlten metal accommodation chamber 1 being used to seal be provided with on the motlten metal accommodation chamber 1 open-topped lid 11.On lid 6, be provided with to be respectively applied for and survey the motlten metal liquid level upper limit and preset middle spacing liquid level sensor 14 and 15 that is positioned at compression chamber 2.At this, be used to survey preset in the middle of this spacing liquid level sensor 15 be set to survey and be positioned at several millimeters surfaces, top, communicating pipes 8 lower end to the motlten metal at tens millimeters places.
In the low-pressure casting apparatus with said structure 100, this inert gas generator 30 provides inert gas through the space of the motlten metal top of inert gas supply hole 10 in compression chamber 2.In addition, this inert gas is discharged from through steam vent 40, and is excessive with the pressure that prevents motlten metal superjacent air space in the compression chamber 2.In the case, at first console switch valve 5 is to open intercommunicating pore 4, and the motlten metal that is positioned at the motlten metal accommodation chamber is admitted to compression chamber 2.Motlten metal liquid level in liquid level sensor 14 detects compression chamber 2 reaches in limited time, and console switch valve 5 is to cut out intercommunicating pore 4.After this, high-pressure inert gas is provided, so that the motlten metal in the compression chamber 2 is pressurizeed through inert gas supply hole 10.Motlten metal in the compression chamber 2 is injected into through communicating pipe 8 in the die cavity of casting mold 7 (seeing Fig. 2 A).After the motlten metal in the die cavity of casting mold 7 solidified, console switch valve 5 made the motlten metal in the compression chamber 2 flow back to motlten metal accommodation chamber 1 (seeing Fig. 2 B) to open intercommunicating pore 4.
Except said method, also can control the pressure of inert gas in the compression chamber 2 through other any ways.For example, can control its pressure through an electromagnetic switch valve 42 that is communicated with steam vent 40.Can change the pressure of the inert gas that is discharged from through the operation of control electromagnetic switch valve 42.The pressure of the inert gas that operation change provided that alternatively, can be through the switch valve 34 in the control inert gas generator 30.
After liquid level sensor 15 detects the liquid level of the motlten metal in the compression chamber 2, reduce the pressure of the inert gas that provides through inert gas supply hole 10.Therefore when the space of the further reduction of motlten metal liquid level and this motlten metal top was communicated with this communicating pipe 8, inert gas stably injected communicating pipe 8, and can in communicating pipe 8, not bring any motlten metal into.When the liquid level that detects this motlten metal when liquid level sensor 9 reach a certain height, locate highly to be formed at wherein that the space above the motlten metal was communicated with this communicating pipe 8 in this compression chamber 2 at this, console switch valve 5 is to cut out intercommunicating pore 4 (seeing Fig. 2 C).Be meant the situation that gas (inert gas) passage is not melted metal and is hindered in this " connection ".
Next, through steam vent 40 inert gas is discharged, so that the pressure of motlten metal superjacent air space is decreased near atmospheric pressure in the compression chamber 2.The foundry goods that will be formed by the motlten metal after solidifying thereafter, takes out from casting mold 7.
In low-pressure casting apparatus 100, liquid level sensor 9 is used to survey being communicated with of motlten metal superjacent air space and communicating pipe 8.Therefore,, can close intercommunicating pore 4, be back in the motlten metal accommodation chamber 1 to stop the motlten metal in the compression chamber 2 through switch valve 5 examining inert gas after inflow communicating pipe 8.That is, because the motlten metal superjacent air space was communicated with communicating pipe 8 in the compression chamber 2, the inert gas in the compression chamber 2 has flowed in communicating pipe 8 really.Therefore, the molten metal surface in communicating pipe 8 does not contact with air, and this has prevented to form the oxidized metal on the motlten metal in communicating pipe 8 really.In addition, remaining motlten metal is prevented from being back to motlten metal accommodation chamber 1.Therefore, be shortened casting cycle and improved productivity ratio and efficient.And because motlten metal accommodation chamber 1 and the relative distance between communicating pipe 8, perhaps the relative distance between compression chamber 2 and communicating pipe 8 does not change, and can prevent that gas from leaking.
After the last drag box separation with casting mold 7, from the casting mold die cavity, take out the foundry goods that solidify to form by motlten metal.Subsequently cope and drag box assembling are formed die cavity.In low-pressure casting apparatus 100, this casting mold die cavity can be injected into inert gas through communicating pipe 8.
Shown in Fig. 3 A and 3B, the bottom of communicating pipe 8 can be diagonal cut joint or interrupted opening.Under this structure, when the lower submerged of communicating pipe 8 in compression chamber 2 from the motlten metal of motlten metal accommodation chamber 1 in the time, its a part of bottom opening is positioned at the top of molten metal surface.Therefore inflow should communicating pipe 8 more glibly under the effect of inert gas pressure for this motlten metal.
In the above-described embodiments, the motlten metal from compression chamber 2 was injected in the die cavity of casting mold 7 through communicating pipe 8.Yet the present invention is not limited thereto.For example, low-pressure casting apparatus 101, one guide holes 21 as shown in Figure 4 are communicated with compression chamber 22, be used for motlten metal from the compression chamber 2 guide to casting mold 7 the sprue gate.In this case, one has the liquid level of motlten metal in the liquid level sensor 29 detection compression chambers 22 of identical function with liquid level sensor 9.At this liquid level place, the space that is formed at this motlten metal top in this compression chamber 22 is communicated with guide hole 21.
In addition, in the above-described embodiments, a contact liquid level sensor is used as liquid level sensor, is used to survey the liquid level of motlten metal.Yet the present invention is not limited thereto.Also can adopt for example contactless liquid level sensor such as ultrasonic solution face sensor.
In the above-described embodiments, inert gas generator 30 comprises air accumulator 32, switch valve 34 and conduit 36.Yet the present invention is not limited thereto.Can adopt other any structures, for example from atmosphere separation of nitrogen and through compressor to its device that pressurizes.
Next, describe with reference to the low-pressure casting apparatus 110 among 5 couples of embodiment three of accompanying drawing.As shown in Figure 5, low-pressure casting apparatus 110 comprises a pressure sensor 19, is used for the liquid level sensor 9 of the low-pressure casting apparatus shown in the alternate figures 1.This pressure sensor 19 is by lid 6 supports and be used to survey the pressure in the compression chamber 2.
A liquid level sensor as in the compression chamber 2 is provided with a liquid level sensor 14, is used to survey the liquid level upper limit of motlten metal in the compression chamber 2.With reference to the description of low-pressure casting apparatus 100, any pressure that all can control inert gases in the compression chamber 2 in electromagnetic switch valve 42 and the switch valve 34, function is equivalent to a pressure control device.This pressure control device is based on by pressure sensor 19 or the measured pressure of other any pressure sensors the pressure in the compression chamber 2 being controlled.Typically, also be provided with a control device (figure do not show), its be used to receive pressure signal and operate one be used to control pressure device.
In the low-pressure casting apparatus with said structure 110, inert gas generator 30 is through the space inert gas injecting of inert gas supply hole 10 motlten metal top in compression chamber 2.In addition, inert gas is discharged from through steam vent 40, and is excessive with the pressure that prevents motlten metal superjacent air space in the compression chamber 2.In the case at first console switch valve 5 to open intercommunicating pore 4.The motlten metal that is arranged in motlten metal accommodation chamber 1 is injected into compression chamber 2.When liquid level sensor 14 detects going up in limited time of motlten metal liquid level in the compression chamber 2, console switch valve 5 is to cut out intercommunicating pore 4.The inert gas of high pressure is injected in the compression chamber 2 so that motlten metal is pressurizeed through inert gas supply hole 10 then.From the motlten metal in the compression chamber 2 through (seeing Fig. 6 A) in the casting mold die cavity that is injected into casting mold 7 communicating pipe 8.After the motlten metal of the casting mold die cavity that is positioned at casting mold 7 solidified, console switch valve 5 was opening intercommunicating pore 4, and control is from the pressure of the inert gas of inert gas generator 30.After this motlten metal in the compression chamber 2 is back in the motlten metal accommodation chamber 1 and (sees Fig. 6 B).The liquid level that pressure sensor 19 detects the motlten metal in the compression chamber 2 reduces, and the space of detecting above the motlten metal was communicated with communicating pipe 8.When the liquid level of motlten metal further was reduced to preset value, console switch valve 5 was to cut out intercommunicating pore 4 (seeing Fig. 6 C).That is to say; When this motlten metal is back to this motlten metal accommodation chamber 1 from this compression chamber 2; Cause the liquid level of motlten metal to reduce; Thereby make when the space of motlten metal top was communicated with this communicating pipe 8 in this compression chamber 2 that the pressure values that this pressure sensor 19 is detected in this case is as preset pressure.Also detectable other any pressure of pressure sensor 19, the pressure before for example the space above the motlten metal was communicated with communicating pipe 8 in compression chamber 2.Then, the pressure of the control inert gas that reduces to provide through inert gas supply hole 10.Like this, further reduce the liquid level of motlten metal so that the space of motlten metal top was communicated with communicating pipe, this inert gas stably flows into communicating pipe 8 thus, and can in communicating pipe 8, not bring motlten metal into.
When the liquid level of motlten metal when the height of communicating pipe 8 and the spatial communication of motlten metal top descends, the inert gases in the compression chamber 2 flowed in communicating pipe 8.Then, discharge inert gas, make the pressure in space of the motlten metal top in the compression chamber 2 equate with atmospheric pressure basically through steam vent.Then, will solidify the foundry goods that forms by motlten metal takes out from casting mold 7.
Even in low-pressure casting apparatus 110, behind the cope and drag box that separate casting mold 7, from the casting mold die cavity, will solidify the foundry goods that forms and take out by motlten metal.Then cope and drag box are assembled to form die cavity.Through filling with from the inert gas in the compression chamber 2 communicating pipe 8 to this casting mold die cavity.
In the above-described embodiments, the motlten metal from compression chamber 2 was injected in the die cavity of casting mold 7 through communicating pipe 8.But the present invention is not limited thereto.For example, in low-pressure casting apparatus as shown in Figure 7 111, guide hole 21 is communicated with compression chamber 22, is used for the motlten metal of compression chamber 22 is inducted into the sprue gate of casting mold 7.In this case, the pressure the when pressure sensor 39 identical with pressure sensor 19 effect surveyed space above this motlten metal when being formed at this compression chamber 22 in and be communicated with this guide hole 21 in this compression chamber 22 is with as preset pressure.
Thereby when through being pressurizeed in compression chamber 2 motlten metal being injected the die cavity of casting mold 7, pressure sensor 19 and 39 can be used as the pressure sensor that is used for controlling compression chamber's 2 pressure equally.
In the above-described embodiments, sensing device can be liquid level sensor 9 or 29, perhaps pressure sensor 19 or 39.Yet, also can adopt other anyly can detect the space of the top of motlten metal in the compression chamber and the sensing device that is communicated with of communicating pipe or guide hole.For example, survey above-mentioned connection and whether realize through surveying resistance between the weight in the compression chamber 2,22 or separate 2.
Claims (9)
1. a low-pressure casting apparatus wherein utilizes inert gas that motlten metal is pressurizeed, and makes motlten metal be injected into this casting mold through the guide hole that the hang down communicating pipe be located at casting-up mouth place or one one end link to each other with this sprue gate, and this device comprises:
One motlten metal accommodation chamber;
One compression chamber that is communicated with this motlten metal accommodation chamber through an intercommunicating pore, this compression chamber of insertion, bottom that wherein should communicating pipe, perhaps the other end of this guide hole links to each other with this compression chamber, and wherein pressurizeed by inert gas in the surface of this motlten metal;
One is used to open or close the switch valve of this intercommunicating pore, and this switch valve can make this motlten metal be fed to this compression chamber from this motlten metal accommodation chamber, and makes this motlten metal be back to this motlten metal accommodation chamber from this compression chamber;
One is used for surveying the space of this motlten metal top, compression chamber and the sensing device that is communicated with of this communicating pipe or this guide hole; And
One is used for inert gas is injected the inert gas generator on this top, compression chamber.
2. low-pressure casting apparatus according to claim 1; Wherein this sensing device is one to be used for surveying the liquid level sensor of a liquid level of the motlten metal of this compression chamber, and wherein the space above the motlten metal is communicated with this communicating pipe or this guide hole in this this compression chamber, liquid level place.
3. low-pressure casting apparatus according to claim 1; Wherein this sensing device is one to be used for surveying the pressure sensor of a preset pressure of this compression chamber, wherein under this preset pressure in this compression chamber the space above the motlten metal be communicated with this communicating pipe or this guide hole.
4. according to each described low-pressure casting apparatus among the claim 1-3, wherein should hang down communicating pipe and be located at this place, sprue gate, and
Wherein when the bottom of this communicating pipe was immersed in the motlten metal of this compression chamber, the part of the bottom opening of this communicating pipe was open in the surface of this motlten metal, and wherein this motlten metal is provided from this motlten metal accommodation chamber.
5. the method for inert gas injecting in this communicating pipe or this guide hole in the described low-pressure casting apparatus of claim 2, this method comprises the steps:
In this compression chamber, utilize inert gas that this motlten metal is pressurizeed, make this motlten metal be injected into this casting mold through this communicating pipe or this guide hole;
After the motlten metal that is injected into solidifies, open this intercommunicating pore;
Make this motlten metal that is arranged in this compression chamber be back to this motlten metal accommodation chamber, so that this liquid level sensor is surveyed the liquid level of this motlten metal in this compression chamber;
The space that is formed at this motlten metal top in this compression chamber is communicated with this communicating pipe or this guide hole; And
Inert gas in this compression chamber is flowed into should communicating pipe or this guide hole.
6. the method for inert gas injecting in the casting mold die cavity in the described low-pressure casting apparatus of claim 2, this method comprises the steps:
In this compression chamber, utilize inert gas that this motlten metal is pressurizeed, make this motlten metal be injected into this casting mold through this communicating pipe or this guide hole;
After the motlten metal that is injected into solidifies, open this intercommunicating pore;
Make this motlten metal that is arranged in this compression chamber be back to this motlten metal accommodation chamber, so that this liquid level sensor is surveyed the liquid level of this motlten metal in this compression chamber;
The space that is formed at this motlten metal top in this compression chamber is communicated with this communicating pipe or this guide hole;
Form a casting mold die cavity of this casting mold; And
After this casting mold die cavity forms, inert gas is provided to this compression chamber so that inert gas injects this casting mold die cavity.
7. the method for inert gas injecting in this communicating pipe or this guide hole in the described low-pressure casting apparatus of claim 3, this method comprises the steps:
In this compression chamber, utilize inert gas that this motlten metal is pressurizeed, make this motlten metal be injected into this casting mold through this communicating pipe or this guide hole;
After the motlten metal that is injected into solidifies, open this intercommunicating pore;
Make the motlten metal in this compression chamber be back to this motlten metal accommodation chamber to reduce the liquid level of this motlten metal, so that this pressure sensor is surveyed the preset pressure in this compression chamber;
The space that is formed at this motlten metal top in this compression chamber is communicated with this communicating pipe or this guide hole;
And
Inert gas in this compression chamber is injected should communicating pipe or this guide hole.
8. method to a casting mold die cavity inert gas injecting of this casting mold of the described low-pressure casting apparatus of claim 3, this method comprises the steps:
In this compression chamber, utilize inert gas that this motlten metal is pressurizeed, make this motlten metal be injected into this casting mold through this communicating pipe or this guide hole;
After the motlten metal that is injected into solidifies, open this intercommunicating pore;
Make the motlten metal in this compression chamber be back to this motlten metal accommodation chamber to reduce the liquid level of this motlten metal, so that this pressure sensor is surveyed the preset pressure in this compression chamber;
The space that is formed at this motlten metal top in this compression chamber is communicated with this communicating pipe or this guide hole;
Form a casting mold die cavity of this casting mold; And
After this casting mold die cavity forms, inert gas is provided to this compression chamber so that this inert gas injects this casting mold die cavity.
9. one kind is utilized the method that each described low-pressure casting apparatus is produced foundry goods among the claim 1-3, and this method comprises the steps:
To this compression chamber inert gas is provided by this inert gas generator;
Open this intercommunicating pore through this switch valve, the motlten metal in this motlten metal accommodation chamber is injected this compression chamber;
After opening the step of this intercommunicating pore, close this intercommunicating pore through this switch valve, will be injected into this compression chamber by the inert gas that this inert gas generator provides with to this motlten metal pressurization, make the motlten metal in this compression chamber inject this casting mold;
Cooling is injected into the motlten metal in this casting mold;
After waiting to be injected into the motlten metal cooling and curing in this casting mold, open this switch valve and make the motlten metal in this compression chamber be back to this motlten metal accommodation chamber; And
Treat that this motlten metal is back to this motlten metal accommodation chamber from this compression chamber, and after making the space that is formed at the top of motlten metal in this compression chamber and this communicating pipe or this guide hole being communicated with, close this intercommunicating pore through this switch valve.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007106639A JP2008044007A (en) | 2007-04-16 | 2007-04-16 | Low-pressure casting apparatus and method for filling inert gas |
| JP106639/2007 | 2007-04-16 | ||
| JP2007157055A JP2008044008A (en) | 2007-06-14 | 2007-06-14 | Low-pressure casting apparatus, and inert gas filling method |
| JP157055/2007 | 2007-06-14 | ||
| PCT/JP2008/056924 WO2008132991A1 (en) | 2007-04-16 | 2008-04-08 | Low-pressure casting apparatus, method of inert gas filling and process for manufacturing cast article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101657282A CN101657282A (en) | 2010-02-24 |
| CN101657282B true CN101657282B (en) | 2012-06-06 |
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| CN200880012074XA Active CN101657282B (en) | 2007-04-16 | 2008-04-08 | Low-pressure casting apparatus, method of inert gas filling and process for manufacturing cast article |
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| JP (1) | JP2008044007A (en) |
| CN (1) | CN101657282B (en) |
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| CN101956121B (en) * | 2010-10-13 | 2013-03-13 | 江苏万恒铸业有限公司 | Manufacture process of high-pressure hydro-stainless steel valve casting |
| CN102962430A (en) * | 2011-08-31 | 2013-03-13 | 广东鸿泰科技股份有限公司 | Low-pressure casting method and device thereof |
| KR101987151B1 (en) * | 2012-11-26 | 2019-06-10 | 현대자동차 주식회사 | Casting apparatus for cylinder head and heat treatment method for cyninder head |
| CN103196786B (en) * | 2013-03-14 | 2015-05-20 | 华中科技大学 | Method and device for quantitatively measuring content of gas inside aluminum alloy die casting |
| CN103658600B (en) * | 2013-12-31 | 2015-09-30 | 苏州明志科技有限公司 | A kind of pouring procedure of low pressure casting and apparatus for pouring |
| CN104625017B (en) * | 2015-02-03 | 2016-11-23 | 辽宁伊菲科技股份有限公司 | A kind of dual chamber holding furnace cast continuously for low pressure and operational approach |
| CN112692257B (en) * | 2021-01-29 | 2021-09-24 | 能硕热技术(清远)有限公司 | Two-chamber low-pressure casting holding furnace and low-pressure casting method |
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|---|---|---|---|---|
| US5913358A (en) * | 1993-11-11 | 1999-06-22 | Hi-Tec Metals Ltd. | Casting apparatus and method |
| US5948352A (en) * | 1996-12-05 | 1999-09-07 | General Motors Corporation | Two-chamber furnace for countergravity casting |
-
2007
- 2007-04-16 JP JP2007106639A patent/JP2008044007A/en active Pending
-
2008
- 2008-04-08 CN CN200880012074XA patent/CN101657282B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5913358A (en) * | 1993-11-11 | 1999-06-22 | Hi-Tec Metals Ltd. | Casting apparatus and method |
| US5948352A (en) * | 1996-12-05 | 1999-09-07 | General Motors Corporation | Two-chamber furnace for countergravity casting |
Non-Patent Citations (2)
| Title |
|---|
| JP特開2000-271723A 2000.10.03 |
| JP特開2000-42715A 2000.02.15 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101657282A (en) | 2010-02-24 |
| JP2008044007A (en) | 2008-02-28 |
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