CN109047668A - Dispellable mould casting riser and Casting Equipment - Google Patents
Dispellable mould casting riser and Casting Equipment Download PDFInfo
- Publication number
- CN109047668A CN109047668A CN201811140899.1A CN201811140899A CN109047668A CN 109047668 A CN109047668 A CN 109047668A CN 201811140899 A CN201811140899 A CN 201811140899A CN 109047668 A CN109047668 A CN 109047668A
- Authority
- CN
- China
- Prior art keywords
- riser
- casting
- opening
- metal liquid
- feeding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- 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
Abstract
Present disclose provides a kind of dispellable mould casting riser, for carrying out feeding to casting comprising: peripheral wall, peripheral wall are made of gas impermeable material, and form the Feeding channel passed through for the feeding metal liquid of casting；First opening, the first opening are used as the supply port of feeding metal liquid；And second opening, second opening be connected to casting, for casting provide feeding metal liquid, wherein first opening positioned at second be open top.
Description
Technical field
This disclosure relates to a kind of dispellable mould casting riser and Casting Equipment.
Background technique
Lost foam casting is mainly used for the Foundry Production of cast iron, magnesium iron, aluminium alloy and certain small-sized Thin-Section Steel Castings at present
On, cast iron and magnesium iron can be carried out from feeding in process of setting by graphite expansion, and aluminium alloy and small-sized Thin-Section Steel Castings exist
Required feeding amount very little when solidification shrinkage.And wall thickness is often gone out in being produced using lost foam casting compared with section steel castings
Not enough there is the defects of shrinkage cavity, cast-internal is not fine and close in existing feeding a casting, this is to produce heavy wall in lost foam casting at this stage
Insurmountable difficulty during steel-casting.
Riser is to feed metal liquid to the cavity for storing metal liquid in casting mold in casting formation, prevent from contracting
Hole, shrinkage porosite, the effect for being vented sum aggregate slag.In lost foam casting production, riser is generally white mould material, and riser and casting are simultaneously
It is acted on by negative pressure of vacuum, and the coating permeability brushed outside riser is good, in casting process, metal liquid rises and replaces
Bai Mo, during feeding, for riser inner metal liquid body by lateral negative-pressure sucking, this not only accelerates riser inner metal liquid
The setting rate of body, the feeding capacity for also causing riser inner metal liquid body downward weaken, and receive casting in liquid contraction and solidification
It cannot get enough metal liquids when contracting to carry out feeding and generate defect.
In actual production, inventor also attempts to replace insulated feeder used in sand casting and heat preservation riser
White mould riser increases the feeding capacity of riser, but due to insulated feeder and heat preservation riser tissue looseness, by negative
Under pressure effect, the metal liquid in riser occupies riser internal clearance, forms the iron of an infusibility after metal liquid is cooling with riser
Block and can not handle, as shown in Figure 1.
Summary of the invention
At least one of in order to solve the above-mentioned technical problem, present disclose provides a kind of dispellable mould casting riser and castings
Manufacturing apparatus.
According to one aspect of the disclosure, a kind of lost pattern casting riser, for carrying out feeding to casting, riser includes:
Peripheral wall, peripheral wall are made of gas impermeable material, and form the Feeding channel passed through for the feeding metal liquid of casting；First opens
Mouthful, the first opening is used as the supply port of feeding metal liquid；And second opening, second opening is connected to casting, be used for
Feeding metal liquid is provided to casting, wherein the first opening is located at the top of the second opening.
According at least one embodiment of the disclosure, the peripheral wall external atmospheric pressure of riser is less than gas on the inside of the peripheral wall of riser
Pressure.
According at least one embodiment of the disclosure, on the inside of the peripheral wall of riser and the air pressure of the first opening is atmosphere
Pressure, the peripheral wall outside of riser and the air pressure of the second opening are negative pressure.
According at least one embodiment of the disclosure, riser is made of heat-resisting material.
According at least one embodiment of the disclosure, the shape of riser is cylindrical or tapered.
According at least one embodiment of the disclosure, casting and feeding are Steel material with metal liquid.
According to another aspect of the present disclosure, Casting Equipment is planted, comprising: running channel, for providing casting metal liquid；It disappears
Mould receives casting metal liquid, to form casting；Filler surrounds evaporative pattern, and the periphery of filler is by gastight material
Sealing；Riser as described above, riser are connected to evaporative pattern；And vacuum evacuation device, including vacuum orifice, vacuum orifice be used for
The gas in filler is extracted to form negative pressure state.
According at least one embodiment of the disclosure, running channel and riser are at the opposite two sides of evaporative pattern.
According at least one embodiment of the disclosure, the quantity of riser is multiple.
According at least one embodiment of the disclosure, riser is set at the cooling the latest of casting metal liquid.
According at least one embodiment of the disclosure, filler is foundry sand, and foundry sand is contained in sandbox
In and the top of foundry sand covered by plastic film.
According at least one embodiment of the disclosure, the top of running channel and riser is exposed to except filler, lower part by
Filler surrounds.
According at least one embodiment of the disclosure, the second opening of vacuum orifice and riser is neighbouring.
According at least one embodiment of the disclosure, filler is nice foundry sand.
Detailed description of the invention
Attached drawing shows the illustrative embodiments of the disclosure, and it is bright together for explaining the principles of this disclosure,
Which includes these attached drawings to provide further understanding of the disclosure, and attached drawing is included in the description and constitutes this
Part of specification.
It should be noted that the disclosure attached drawing in various pieces for exemplary purposes, be not necessarily made to scale into
Row is drawn.
Fig. 1 shows the structural schematic diagram of riser according to prior art.
Fig. 2 shows the structural schematic diagrams according to the riser of the disclosure one embodiment.
Fig. 3 shows the structural schematic diagram of the Casting Equipment according to one embodiment of the disclosure.
Specific embodiment
The disclosure is described in further detail with embodiment with reference to the accompanying drawing.It is understood that this place
The specific embodiment of description is only used for explaining related content, rather than the restriction to the disclosure.It also should be noted that being
Convenient for description, part relevant to the disclosure is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the disclosure can
To be combined with each other.The disclosure is described in detail below with reference to the accompanying drawings and in conjunction with embodiment.
Riser used in feeding during lost foam casting in the prior art is illustrated with reference first to Fig. 1.
As shown in Figure 1, riser includes entrance 1 and outlet 2, and outside is painted with coating 4.Benefit is provided by entrance 1
Contracting metal liquid, outlet 2 is for carrying out feeding to casting 5.But in the manufacturing process of evaporative pattern in the prior art, need
Want riser side wall and the coating of brushing 4 that there is permeability, therefore when being poured the feeding metal liquid of Steel material, due to riser
The gas permeability of side wall and coating 4, metal liquid in riser will by horizontal negative pressure suction (as shown by the arrows in Figure 1) so that
The setting rate of metal liquid in riser is accelerated, and the liquid after solidification will be attached on the inner sidewall of riser, so that feeding is logical
Road 3 narrows, and ultimately forms blocking, and casting cannot get enough feeding metal liquids, and such feeding metal liquid cannot be to casting
Play the role of feeding.And due to the presence of above-mentioned negative pressure pressure, also make what metal liquid flowed downward to slow, therefore
It cannot play the role of the feeding casting in Best Times.It will be ultimately formed shrinkage cavity region 6 and shrinkage porosite region 7 as shown in Figure 1.
Therefore, because the presence of the above problem, although evaporative pattern, in cast-iron square surface technology comparative maturity, lost foam casting but cannot
It is used in Steel material casting field.
In order to solve this problem, present disclose provides one kind to be suitble to the riser used in lost foam casting.Fig. 2 shows
According to the disclosure emit outlet structure.
In Fig. 2, riser 10 may include the first opening 11, second opening 12 and peripheral wall 13.
First opening 11 can be used as the supply port of feeding metal liquid, during riser actual use, lead to
Cross the 11 injection feeding metal liquid of the first opening.
Peripheral wall 13 forms the Feeding channel 14 passed through for feeding metal liquid, and by high temperature resistant gas impermeable material system
At, such as when contacting 1600 DEG C or so of high temperature feeding metal liquid can guarantee certain intensity to maintain original shape.
In an optional embodiment of the disclosure, the peripheral wall 13 of riser 10 is made up of ceramic material, can also be wrapped by periphery
Refractory brick or refractory tube of tinfoil etc. is wrapped with the peripheral wall 13 of riser 10 is made.
Second opening 12 is connected to casting 20, for providing feeding metal liquid to casting 20.It is opened in this way by first
Mouth 11 injects feeding metal liquids, after metal liquid flows through Feeding channel 14, through the second 12 feeding of opening into casting 20.
In an optional embodiment of the disclosure, it is cold the latest that the position of the second opening 12 is preferably provided in casting 20
But locate.
In original riser, as described above because of the gas permeability of riser peripheral wall, feeding metal liquid in riser by
Lateral negative-pressure sucking, metal liquid after cooling in this way will be attached on the peripheral wall of riser, until by channel blockage.But root
According to the dead head structure of the disclosure, due to the air impermeability of 10 peripheral wall of riser, the inside pressure of riser 10 is an atmospheric pressure,
And the outside pressure of riser 10 is then negative pressure (arrow shown in referring to fig. 2).When metal liquid along Feeding channel 14 to flow down
When dynamic, it can't be influenced, will not be pasted on the peripheral wall of riser 10 by the outside negative-pressure sucking of riser 10.And due to
The effect of negative-pressure sucking at two openings 12, the metal liquid in the Feeding channel 14 of riser 10 will will receive from riser 10 to casting
The orientation atmospheric pressure of part 20 accelerates flowing of the metal liquid in Feeding channel 14, to make to generate siphon effect
It obtains metal liquid and is more quickly completed feeding effect.To sum up, the external atmospheric pressure of the peripheral wall 13 of riser 10 can be less than the week of riser 10
The inside air pressure of wall 13；Further the inside of the peripheral wall 13 of riser 10 and first opening 11 at air pressure can be atmospheric pressure,
And the air pressure at the outside of the peripheral wall 13 of riser 10 and the second opening 12 is negative pressure.
Due to the structure of the riser 10 of the disclosure, the cross that the metal liquid in the Feeding channel 14 of riser 10 is subject to is eliminated
To suction, the feeding capacity of riser 10 is enhanced, and the thermal center of casting 20 is enabled to obtain effective feeding, so as to
Guarantee the quality of casting 20 well.
In an embodiment of the disclosure, the shape of riser 10 can, top dome circle cylindrical according to selection needed for casting
Cylindricality, oval cylindricality, necking down shape or decrement shape etc..
And according to the disclosure, casting is wall thickness compared with section steel castings and feeding with metal liquid is Steel material.
According to another aspect of the present disclosure, a kind of Casting Equipment shown in Fig. 3 is additionally provided.
As shown in figure 3, the Casting Equipment may include riser 10, evaporative pattern, running channel 30, casting filler 40 and take out true
Empty device 60.
Wherein riser 10 can be above-mentioned riser.The quantity of riser 10 can be set as one as shown in Figure 3, can also be with
According to actual needs, multiple riser 10 are set, are arranged at the different thermal centers of casting 20.
Running channel 30 is used to receive the casting metal liquid of casting, and the metal liquid is guided into evaporative pattern, thus
Form casting 20.In an optional embodiment of the disclosure, running channel 30 be can be set with riser 10 in the opposite of evaporative pattern
It two sides or is located at the interval larger distance of evaporative pattern.
Casting surrounds evaporative pattern with filler 40, which can be foundry sand, such as nice foundry sand etc..Casting is used
Sand padding and compacting stably keeps the evaporative pattern into sandbox 51.
The sandbox 51 can be made of gas impermeable material, and as shown in figure 3, the top of the foundry sand can be by airtight
Material 52 seals, such as plastic film etc..And the first opening 11 of riser 10 is exposed to except plastic film, and running channel 30
Cast gate 31 also expose except plastic film.
The vacuum lead of vacuum evacuation device 60 can be set on the wall surface of sandbox 51, be made by vacuum evacuation device 60
The state of negative pressure of vacuum is formed in sandbox 51.In a preferred embodiment of the disclosure, vacuum evacuation device 60 setting with
At the neighbouring position of riser 10.
In the casting process of the casting device of the disclosure, by by riser 10, evaporative pattern, running channel 30, filler 40, take out
Vacuum plant 60 and other above-mentioned various pieces arrangement after the completion of, vacuum evacuation device 60 start to work, and by running channel 30 come
Inject casting metal liquid, casting is flowed into evaporative pattern with metal liquid and forms casting, and by riser 10 need into
Feeding metal liquid is injected at the position of row feeding a casting.Feeding with metal liquid by above-mentioned siphonage, rapidly
It flows into the casting portion for needing feeding, eventually forms the casting of high quality.
By the riser and casting device of the disclosure, can efficiently solve existing riser cannot carry out asking for feeding very well
Topic, and especially during producing heavy wall steel-casting, so that the use of original evaporative pattern is by that can not become possible.
In the description of this specification, reference term " one embodiment/mode ", " some embodiment/modes ", " show
The description of example ", " specific example " or " some examples " etc. mean to combine the specific features of the embodiment/mode or example description,
Structure, material or feature are contained at least one embodiment/mode or example of the application.In the present specification, to upper
The schematic representation for stating term is necessarily directed to identical embodiment/mode or example.Moreover, the specific features of description,
Structure, material or feature can be combined in any suitable manner in any one or more embodiment/modes or example.In addition,
Without conflicting with each other, those skilled in the art can by different embodiment/modes described in this specification or
Example and different embodiment/modes or exemplary feature are combined.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present application, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
It will be understood by those of skill in the art that above embodiment is used for the purpose of clearly demonstrating the disclosure, and simultaneously
Non- be defined to the scope of the present disclosure.For those skilled in the art, may be used also on the basis of disclosed above
To make other variations or modification, and these variations or modification are still in the scope of the present disclosure.
Claims (10)
1. a kind of dispellable mould casting riser, for carrying out feeding to casting, which is characterized in that the riser includes:
Peripheral wall, the peripheral wall are made of gas impermeable material, and form the benefit passed through for the feeding metal liquid of the casting
Contracting channel；
First opening, first opening are used as the supply port of the feeding metal liquid；And
Second opening, second opening is connected to the casting, for providing the feeding metal liquid to the casting,
Wherein, first opening is located at the top of second opening.
2. riser as described in claim 1, which is characterized in that the peripheral wall external atmospheric pressure of the riser is less than the week of the riser
Air pressure on the inside of wall.
3. riser as claimed in claim 1 or 2, which is characterized in that the peripheral wall inside of the riser and the gas of the first opening
Pressure is atmospheric pressure, and the peripheral wall outside of the riser and the air pressure of the second opening are negative pressure.
4. riser as claimed any one in claims 1 to 3, which is characterized in that the riser is made of heat-resisting material.
5. riser according to any one of claims 1 to 4, which is characterized in that the shape of the riser is for cylinder or gradually
Contracting shape.
6. the riser as described in any one of claims 1 to 5, which is characterized in that the casting and the feeding molten metal
Body is Steel material.
7. a kind of Casting Equipment characterized by comprising
Running channel, for providing casting metal liquid；
Evaporative pattern receives the casting metal liquid, to form casting；
Filler surrounds the evaporative pattern, and the periphery of the filler is sealed by gastight material；
Such as riser described in any one of claims 1 to 6, the riser is connected to the evaporative pattern；And
Vacuum evacuation device, including vacuum orifice, the vacuum orifice are used to extract the gas in the filler to form negative pressure
State.
8. Casting Equipment as claimed in claim 7, which is characterized in that the running channel is in the opposite of evaporative pattern with the riser
Two sides at.
9. Casting Equipment as claimed in claim 7 or 8, which is characterized in that the quantity of the riser is multiple.
10. the Casting Equipment as described in any one of claim 7 to 9, which is characterized in that the riser is set to the casting
At metal liquid the latest cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811140899.1A CN109047668A (en) | 2018-09-28 | 2018-09-28 | Dispellable mould casting riser and Casting Equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811140899.1A CN109047668A (en) | 2018-09-28 | 2018-09-28 | Dispellable mould casting riser and Casting Equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109047668A true CN109047668A (en) | 2018-12-21 |
Family
ID=64766405
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811140899.1A Pending CN109047668A (en) | 2018-09-28 | 2018-09-28 | Dispellable mould casting riser and Casting Equipment |
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| CN106825411A (en) * | 2017-01-17 | 2017-06-13 | 四川维珍高新材料有限公司 | A kind of super-low carbon stainless steel lost foam casting process |
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Application publication date: 20181221 |
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