CN207629138U - A kind of high exhaust lost foam casting structure - Google Patents
A kind of high exhaust lost foam casting structure Download PDFInfo
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- CN207629138U CN207629138U CN201721882801.0U CN201721882801U CN207629138U CN 207629138 U CN207629138 U CN 207629138U CN 201721882801 U CN201721882801 U CN 201721882801U CN 207629138 U CN207629138 U CN 207629138U
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Abstract
The utility model is related to casting technology field more particularly to a kind of high exhaust lost foam casting structures, it is characterised in that：Including negative-pressure flask, sprue foam mold, ingate foam mold, casting foam mold and riser foam mold；The sprue foam mold is assembled into an overall structure by ingate foam mold, casting foam mold and at least one riser foam mold, and the overall structure is externally provided with exhaust piece；The overall structure is placed in negative-pressure flask, and one layer of casting layer of sand is filled between the overall structure and negative-pressure flask；The negative-pressure flask has negative pressure ventilation mouth.It realizes the Quick air-discharge of cavity, coordinates vacuum extractor, certain negative pressure state can be formed in cavity, avoid returning spray phenomenon during lost foam casting, preferably prevent the defect of casting, improve the quality of cast member, it can also improve the degree of safety of production in addition.
Description
Technical field
The utility model is related to casting technology field more particularly to a kind of high exhaust lost foam casting structures.
Background technology
Lost foam casting is one kind in casting technique, which is first made foamed model by EPC techniques, is coated with special painting
Material, drying are placed in special sandbox, insert dry sand, and three-dimensional vibrating consolidation is vacuumized and cast under state, and model gasification disappears,
Metal replacement model copies the casting as foamed mould, discharges vacuum after condensation, casting is taken out from loose sand, into
The next cycle of row.Technology of EPC is also known as " green revolution of foundary industry "；
Lost foam casting can have various casting flaws in casting technique；It is bad to fill type, stomata, it is evaporative pattern to be mingled with etc.
Common several defects in casting, it is also that often there is a phenomenon where return not only possible when spraying serious in lost foam casting to return spray in addition
The personal safety of entail dangers to pourer can also make casting generate other a series of defects, it is necessary to be paid attention to, be returned to mitigate
Phenomenon is sprayed, the casting producer of commonly used lost foam casting process takes following measure：First, the density of bubbles model is reduced,
Ensureing foam surface quality, under the premise of ensureing mold strength, foam should be made more lighter better, getting angry when being poured into a mould to reduce
Amount.Second, bubbles model has to dry before coating, and every batch of bubbles model should inspect the weight change of its drying course by random samples, only
Have and no longer changes and can coat in weight.Third, increase the gas permeability of running gate system, especially sprue and
Cross gate should not be coated, and the gas generated when can enable cast in this way is quickly fully taken away, and does not coat, and save
The consumption of coating.4th, lost foam paint has very excellent gas permeability, can quickly export the product of apperance gasification,
The pressure of cavity is reduced, realization quickly fills type, avoids the occurrence of and return spray.
1, the density for reducing bubbles model is the scheme that each casting producer preferentially selects, and can not only reduce hair when cast
Tolerance, moreover it is possible to save the cost of bubbles model, 2, the drying of foam type be that lost foam casting hangs essential process before coating,
And be the process for having to strictly control, 3, increase the gas permeability of running gate system, the simple gas permeability for considering casting system is poured
Injection system can not swabbing, but not give running gate system swabbing, have sand washing risk in casting process, can further cause
Casting inclusion defect considers the method and undesirable from casting quality；4, the coating price of highly-breathable is relatively high, now big
Most lost foam casting producers use silica flour and graphite powder as the coating of refractory aggregate, and the gas permeability of coating is relatively poor
Some.In summary, it is necessary to from other directions as the breach for increasing exhaust, the method used in of the invention, in not shadow
In the case of ringing casting structure, the Quick air-discharge of cavity is realized, coordinate vacuum extractor, can form certain negative pressure in cavity
State avoids returning spray phenomenon during lost foam casting, preferably prevents the defect of casting, improve the quality of cast member, in addition
It can also improve the degree of safety of production.
Utility model content
In view of this, utility model aims to solve the above problems, and propose a kind of high exhaust lost foam casting
Structure.
In order to achieve the above objectives, the utility model provides the following technical solutions：A kind of high exhaust lost foam casting structure,
It is characterized in that：Including negative-pressure flask, sprue foam mold, ingate foam mold, casting foam mold and riser foam mold
Tool；The sprue foam mold passes through ingate foam mold, casting foam mold and at least one riser foam mold group
Dress is an overall structure, and the overall structure is externally provided with exhaust piece；The overall structure is placed in negative-pressure flask, and described
One layer of casting layer of sand is filled between overall structure and negative-pressure flask；The negative-pressure flask has negative pressure ventilation mouth.
Above structure setting benefit be：These bubbles models are fitted together, special coating is coated with, reserve placement
It is vented the position of piece, exhaust piece is assembled on built-up pattern after dry, it is whole that built-up pattern is placed in special sandbox, it inserts
Dry sand three-dimensional vibrating consolidation from negative pressure ventilation mouth to being vacuumized in sandbox, and is cast under the state that vacuumizes, and bubbles model is equal
Gasification disappears, and metal replacement bubbles model copies the casting as foamed mould, vacuum is discharged after waiting molten iron to condense, from pine
Casting is taken out in scattered sand, carries out next cycle；
It is vented piece by placement, realizes that the Quick air-discharge of cavity, negative pressure ventilation mouth coordinate vacuum extractor, the meeting in cavity
Certain negative pressure state is formed, avoids returning spray phenomenon during lost foam casting, preferably prevents the defect of casting, improve casting
The quality of part, in addition it can also improve the degree of safety of production.
Further, the sprue foam mold is connected to cross gate foam mold；The cross gate foam mold connection
At least two casting foam molds.
Above structure setting benefit be：Realize multiple casting of casting simultaneously in a negative-pressure flask；And each casting
It not will produce and return spray phenomenon.
Further, the exhaust piece is the high temperature resistant foamed ceramics piece with cellular gap.
Above structure setting benefit be：Under the action of negative pressure, the gas in cavity and impurity are from the unobstructed hole of exhaust piece
In be discharged in sandbox, reduce the pressure of cavity, be conducive to pouring molten iron when be full of cavity, and make foam gasification product and molten iron
In impurity be discharged cavity.
Further, at the top of the negative-pressure flask it is uncovered structure.
Above structure setting benefit be：When convenient for casting molten iron, molten iron is radiated faster, is convenient for rapid shaping,
And convenient for taking out casting.
Further, there is at least one layer of plastic cloth in the casting layer of sand of the negative-pressure flask.
Above structure setting benefit be：Prevent the vacuum extractor that negative pressure ventilation mouth connects from taking casting model powder away.
Further, it is described exhaust piece material can also be foam silicon carbide ceramics, Zirconium oxide foamed ceramic filter or
Alumina Foam Ceramics filter.
Above structure setting benefit be：It is vented piece to be made of the heat-resisting material of low expansion under the condition of high temperature, no
It can be expanded into casting because contact molten iron temperature increases to generate, casting is caused to generate dimensional discrepancy and dreg defect.
Further, the exhaust piece can also be high-temperature fibre cloth.
Above structure setting benefit be：As long as the gas and liquid impurities in discharge cavity can be realized, in sandbox
Dry sand, which does not enter cavity, to be used.
Further, it is connect with sprue cup at the top of the sprue foam mold.
Above structure setting benefit be：Convenient for pouring molten iron.
The beneficial effects of the utility model are compared with prior art：Realize that the Quick air-discharge of cavity, cooperation vacuumize
Device can form certain negative pressure state in cavity, avoid returning spray phenomenon during lost foam casting, preferably prevent casting
Defect, improve the quality of cast member, it can also improve the degree of safety of production in addition.
Description of the drawings
In order to keep the purpose of this utility model, technical solution and advantageous effect clearer, the utility model provides as follows
Attached drawing illustrates：
Fig. 1 is the lost foam casting inside configuration schematic diagram of the utility model；
Fig. 2 is the lost foam casting structure schematic top plan view of the utility model.
Specific implementation mode
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, so that those skilled in the art
The utility model can be better understood from and can be practiced, but illustrated embodiment is not as the restriction to the utility model.
As shown in Figure 1 and Figure 2, a kind of high exhaust lost foam casting structure, including negative-pressure flask 1, sprue foam
Mold 6, ingate foam mold 3, casting foam mold 5 and riser foam mold 9；The sprue foam mold 6, by interior
Cast gate foam mold 3, casting foam mold 5 and at least one riser foam mold 9 are assembled into an overall structure, the entirety
Structure is externally provided with exhaust piece 8；The overall structure is placed in negative-pressure flask 1, and between the overall structure and negative-pressure flask 1
One layer of casting layer of sand 10 of filling；The negative-pressure flask 1 has negative pressure ventilation mouth 4.
Preferably, the sprue foam mold 6 is connected to cross gate foam mold 2；The cross gate foam mold 2 connects
Lead to four casting foam molds 5.
Preferably, the exhaust piece 8 is the high temperature resistant foamed ceramics piece with cellular gap.
Preferably, 1 top of the negative-pressure flask is uncovered structure.
Preferably, there is one layer of plastic cloth 11 in the casting layer of sand 10 of the negative-pressure flask 1.
Preferably, 6 top of the sprue foam mold is connect with sprue cup 7.
Embodiment described above is only the preferred embodiment lifted to absolutely prove the utility model, the utility model
Protection domain it is without being limited thereto.Those skilled in the art on the basis of the utility model made by equivalent substitute or change
It changes, both is within the protection scope of the present invention.The scope of protection of the utility model is subject to claims.
Claims (8)
1. a kind of high exhaust lost foam casting structure, it is characterised in that：Including negative-pressure flask (1), sprue foam mold (6),
Ingate foam mold (3), casting foam mold (5) and riser foam mold (9)；The sprue foam mold (6) passes through
Ingate foam mold (3), casting foam mold (5) and at least one riser foam mold (9) are assembled into an overall structure,
The overall structure is externally provided with exhaust piece (8)；The overall structure is placed in negative-pressure flask (1), and the overall structure with
One layer of casting layer of sand (10) is filled between negative-pressure flask (1)；The negative-pressure flask (1) has negative pressure ventilation mouth (4).
2. high exhaust lost foam casting structure according to claim 1, it is characterised in that：The sprue foam mold
(6) it is connected to cross gate foam mold (2)；The cross gate foam mold (2) is connected at least two casting foam molds (5).
3. high exhaust lost foam casting structure according to claim 1, it is characterised in that：The exhaust piece (8) be with
The high temperature resistant foamed ceramics piece in cellular gap.
4. high exhaust lost foam casting structure according to claim 1, it is characterised in that：At the top of the negative-pressure flask (1)
For uncovered structure.
5. high exhaust lost foam casting structure according to claim 1, it is characterised in that：The casting of the negative-pressure flask (1)
Making in layer of sand (10) has at least one layer of plastic cloth (11).
6. high exhaust lost foam casting structure according to claim 1, it is characterised in that：The material of the exhaust piece (8)
It can also be foam silicon carbide ceramics, Zirconium oxide foamed ceramic filter or Alumina Foam Ceramics filter.
7. high exhaust lost foam casting structure according to claim 1, it is characterised in that：The exhaust piece (8) can be with
It is high-temperature fibre cloth.
8. high exhaust lost foam casting structure according to claim 1, it is characterised in that：The sprue foam mold
(6) top is connect with sprue cup (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721882801.0U CN207629138U (en) | 2017-12-28 | 2017-12-28 | A kind of high exhaust lost foam casting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721882801.0U CN207629138U (en) | 2017-12-28 | 2017-12-28 | A kind of high exhaust lost foam casting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207629138U true CN207629138U (en) | 2018-07-20 |
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ID=62851185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721882801.0U Active CN207629138U (en) | 2017-12-28 | 2017-12-28 | A kind of high exhaust lost foam casting structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN207629138U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110653337A (en) * | 2019-10-18 | 2020-01-07 | 常州市程伟铸造有限公司 | Lost foam casting process |
| CN111922287A (en) * | 2020-08-29 | 2020-11-13 | 晋城市金工铸业有限公司 | Lost foam casting process by open diversion method |
| CN112024823A (en) * | 2020-08-26 | 2020-12-04 | 东风汽车有限公司 | Dark exhaust structure, pouring system and casting method of large casting |
-
2017
- 2017-12-28 CN CN201721882801.0U patent/CN207629138U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110653337A (en) * | 2019-10-18 | 2020-01-07 | 常州市程伟铸造有限公司 | Lost foam casting process |
| CN112024823A (en) * | 2020-08-26 | 2020-12-04 | 东风汽车有限公司 | Dark exhaust structure, pouring system and casting method of large casting |
| CN111922287A (en) * | 2020-08-29 | 2020-11-13 | 晋城市金工铸业有限公司 | Lost foam casting process by open diversion method |
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