CN202725962U - Casting system for metal mold gravity casting aluminum piston - Google Patents
Casting system for metal mold gravity casting aluminum piston Download PDFInfo
- Publication number
- CN202725962U CN202725962U CN 201220363282 CN201220363282U CN202725962U CN 202725962 U CN202725962 U CN 202725962U CN 201220363282 CN201220363282 CN 201220363282 CN 201220363282 U CN201220363282 U CN 201220363282U CN 202725962 U CN202725962 U CN 202725962U
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- sprue
- cross
- ingate
- runner
- casting
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- 238000005266 casting Methods 0.000 title claims abstract description 91
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 67
- 239000002184 metal Substances 0.000 title claims abstract description 67
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 47
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 230000005484 gravity Effects 0.000 title claims abstract description 44
- 239000007788 liquid Substances 0.000 claims description 17
- 239000005995 Aluminium silicate Substances 0.000 claims 1
- 239000004411 aluminium Substances 0.000 claims 1
- PZZYQPZGQPZBDN-UHFFFAOYSA-N aluminium silicate Chemical compound O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 claims 1
- 229910000323 aluminium silicate Inorganic materials 0.000 claims 1
- 235000012211 aluminium silicate Nutrition 0.000 claims 1
- 238000005429 filling process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 239000002893 slag Substances 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 239000013049 sediment Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003031 feeding effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The utility model provides a casting system for a metal mold gravity casting aluminum piston. The casting system comprises a pouring cup, a sprue, a runner and an ingate, wherein the top end of the sprue is communicated with the outlet of the pouring cup, and the sprue extends along the vertical direction; the runner is communicated with the bottom end of the sprue, and the runner extends along a horizontal direction; the inlet of the ingate is communicated with the outlet of the runner, and the outlet of the ingate is communicated with the cavity of a piston mold; the cross section area of the sprue, the runner and the ingate is sequentially increased. As the minimum cross section area of the sprue, the runner and the ingate in the casting system is sequentially increased, the gate ratio of the sprue, the runner and the ingate is strictly controlled, and the casting system becomes an open casting system. The mold-filling speed of molten metal at the outlet of the ingate is fully reduced, the mold-filling process is stable, and the casting quality of an aluminum piston blank can be stabilized. The pinhole, slag inclusion and shrinkage porosity defects of the piston blank are reduced, and therefore the process yield of the piston blank is increased.
Description
Technical Field
The utility model relates to a metal mold gravity casting aluminum piston blank technical field, more specifically say, relate to a metal mold gravity casting system for aluminum piston.
Background
At present, piston blanks of engine piston production enterprises still adopt aluminum alloy metal mold gravity casting, wherein the gravity casting refers to a process of injecting molten metal into a casting mold under the action of gravity, and also refers to gravity casting.
The gating system is the passage of liquid metal into the mold cavity during gravity casting, which directly affects the quality of the gate. The existing aluminum piston casting system mainly comprises a pouring cup, a sprue, a cross runner, an inner runner and other structures, wherein the shape and the ratio of the pouring runner of each pouring runner are not strictly controlled, the randomness is high, and the stable filling of molten metal cannot be ensured, so that the defects of unstable casting quality and high randomness are caused, a cast piston blank often has pinholes, slag inclusion, shrinkage porosity and the like, and the process yield of the piston blank is seriously reduced.
The runner ratio refers to the ratio of the cross-sectional areas of the sprue, runner and ingate.
In summary, a technical problem to be solved by those skilled in the art is how to provide a casting system for a metal mold gravity casting aluminum piston to stabilize the casting quality of an aluminum piston blank and improve the process yield of the piston blank.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a casting system for metal mold gravity casting aluminum piston to stabilize the casting quality of aluminum piston blank, improve the technology yield of piston blank.
In order to achieve the above object, the utility model provides a following technical scheme:
a casting system for a metal mold gravity cast aluminum piston, comprising:
a pouring cup;
the top end of the sprue is communicated with the outlet of the sprue cup, and the sprue extends in the vertical direction;
the cross pouring channel is communicated with the bottom end of the straight pouring channel and extends along the horizontal direction; and
the inlet is communicated with the outlet of the cross pouring channel, and the outlet is communicated with the inner pouring channel of the piston mould; wherein,
the cross-sectional areas of the straight pouring channel, the cross pouring channel and the inner pouring channel are sequentially increased, and the cross-sectional area refers to the minimum cross-sectional area perpendicular to the liquid flow direction.
Preferably, in the casting system for the metal mold gravity casting aluminum piston, the ratio of the cross-sectional areas of the sprue, the runner and the ingate is 1:1.8: 2.
Preferably, the casting system for the metal mold gravity casting aluminum piston further comprises a heat preservation riser arranged at the top of the piston mold.
Preferably, in the casting system for the metal mold gravity casting aluminum piston, an inlet of the pouring cup is in a funnel shape with one side gradually expanding.
Preferably, in the casting system for the metal mold gravity casting aluminum piston, an included angle of 2-4 degrees is formed between the axis of the sprue and the axis of the piston mold.
Preferably, in the casting system for the metal mold gravity casting aluminum piston, the sprue and the runner are variable cross-section runners, the cross-sectional area of the sprue is gradually reduced from the inlet to the outlet, and the cross-sectional area of the runner is gradually increased from the inlet to the outlet; the ingate is a flow passage with equal cross section.
Preferably, in the above casting system for a metal mold gravity casting aluminum piston, the cross-sectional shape of the sprue is trapezoidal.
Preferably, the casting system for the metal mold gravity casting aluminum piston further comprises a filter screen, and the filter screen is arranged at the inlet of the cross gate.
Preferably, in the casting system for the metal mold gravity casting aluminum piston, the filter screen is an aluminum silicate fiber woven screen.
Preferably, in the casting system for the metal mold gravity casting aluminum piston, the bottom end of the ingate is higher than the bottom end of the piston mold, and the distance between the bottom end of the ingate and the bottom end of the piston mold is not more than 10 mm.
According to the above technical scheme, the utility model provides a sprue among the metal type gravity casting aluminum piston casting system, the minimum cross sectional area of sprue and ingate increases in proper order, its sprue, the sprue ratio of sprue and ingate has carried out the strict control, make above-mentioned casting system become an open casting system, the mould filling speed of metal liquid in the ingate exit has fully been reduced, it is steady to make the mould filling process, can stabilize the casting quality of aluminum piston blank, the emergence of the sediment is rolled up to the coil gas has been reduced, the pinhole of piston blank has been reduced, press from both sides the sediment, defects such as shrinkage porosity, thereby the technology yield of piston blank has been improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a casting system for a metal mold gravity casting aluminum piston according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a pouring cup provided in an embodiment of the present invention;
fig. 3 is a schematic cross-sectional structure diagram of a sprue provided in an embodiment of the present invention.
Detailed Description
The embodiment of the utility model provides a metal mold gravity casting system for aluminum piston can stabilize the casting quality of aluminum piston blank, has improved the technology yield of piston blank.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a casting system for a metal gravity casting aluminum piston according to an embodiment of the present invention includes a pouring cup 1, a sprue 2, a runner 3 and an ingate 4; wherein the sprue 2 extends along the vertical direction, and the top end of the sprue is communicated with an outlet of the pouring cup 1; the horizontal pouring gate 3 extends along the horizontal direction and is communicated with the bottom end of the straight pouring gate 2; the inlet of the ingate 4 is communicated with the outlet of the cross gate 3, and the outlet is communicated with the cavity of the piston mold 5; and the cross-sectional areas of the sprue 2, the runner 3 and the ingate 4 are sequentially increased, and the cross-sectional area refers to the minimum cross-sectional area perpendicular to the flow direction.
The pouring cup 1 is an inlet for metal liquid to enter a cavity, the metal liquid is aluminum liquid for manufacturing the aluminum piston, the metal liquid is injected from the pouring cup 1, then flows through the sprue 2 and the cross gate 3 in sequence, enters the ingate 4, and then enters the cavity of the piston mold 5 for mold filling. In the casting process, the sprue 2 is used for introducing molten metal into the runner 3 and providing mold filling pressure for mold filling of gravity casting; the horizontal pouring gate 3 is a part for connecting the sprue 2 and the ingate 4, can buffer the molten metal speed at the bottom of the sprue 2 and change the flow direction of the molten metal so that the molten metal smoothly flows into the cavity through the ingate 4; the ingate 4 is a channel for the molten metal to enter the cavity.
Because the embodiment of the utility model provides a sprue 2 among the metal type gravity casting aluminum piston casting system, the minimum cross sectional area of 3 and ingate 4 of horizontal runner increases in proper order, it is sprue 2, the runner ratio of 3 and ingate 4 of horizontal runner has carried out the strict control, make above-mentioned casting system become an open casting system, the mould filling speed of 4 exits of pouring including the metal liquid has fully been reduced, it is steady to make the mould filling process, can stabilize the casting quality of aluminum piston blank, the emergence of the gas book sediment has been reduced, the pinhole of piston blank has been reduced, press from both sides the sediment, defects such as shrinkage porosity, thereby the technology yield of piston blank has been improved.
Preferably, in the casting system for the metal mold gravity casting aluminum piston provided in the above embodiment, the size ratio of the cross-sectional areas of the sprue 2, the runner 3 and the ingate 4 is 1:1.8: 2. The proportion value is the pouring gate ratio of the casting system, and through years of production practice, the pouring gate ratio of 1:1.8:2 is preferably adopted, so that the casting quality of the aluminum piston blank can be stabilized to the maximum extent, and the process yield of the piston blank is improved. Of course, the above-mentioned pouring gate ratio is not limited to the above-mentioned specific value, and the suitable pouring gate ratio can be selected according to the casting of piston blanks with different sizes, and the embodiment is not limited.
Further, the casting system for the metal mold gravity casting aluminum piston provided by the above embodiment further comprises an insulating riser 6 arranged at the top of the piston mold 5. In the casting mould, the cavity of the riser is a cavity for storing liquid metal, and because the riser is cooled slowest, shrinkage cavity caused by feeding and self-shrinkage can be generated only in the riser, so the riser can feed molten metal when a casting is solidified, the shrinkage cavity and shrinkage porosity are effectively prevented, and the functions of exhausting and collecting slag are achieved. The insulating riser is characterized in that a layer of insulating material, namely an insulating sleeve with lower heat conductivity coefficient and density is arranged on the side surface of the riser, so that the solidification time of the riser is prolonged, and the feeding effect of the riser is improved.
Referring to fig. 2, in the casting system for a metal mold gravity casting aluminum piston provided in the above embodiment, the inlet of the pouring cup 1 is in a funnel shape with one side gradually expanding. At this time, the other side of the pouring cup 1 extends in the vertical direction, and the pouring cup can guide the molten metal to flow along the inner wall of the sprue 2 instead of flowing towards or impacting the inner wall of the sprue 2, so that the occurrence of scattering and slag entrapment is reduced. The inlet of the pouring cup 1 can also be an opening with two sides in a gradually expanding funnel shape, a disc-shaped opening or other opening shapes meeting requirements.
In order to further optimize the technical scheme, in the casting system for the metal mold gravity casting aluminum piston provided by the embodiment, the axis of the sprue 2 and the axis of the piston mold 5 form an included angle of 2-4 degrees. The sprue is arranged in an inclined mode, so that liquid flow in the sprue 2 is smooth when molten metal is poured, and the mold filling process is stable. Different inclination angles can also be selected according to the different lengths of the sprue 2.
Preferably, the sprue 2 and the runner 3 are variable cross-section runners, the cross-sectional area of the sprue 2 from the inlet to the outlet is gradually reduced, and the cross-sectional area of the runner 3 from the inlet to the outlet is gradually increased; the ingate 4 is a flow passage with equal section. Finally, the sprue 2 bottom outlet has a minimum cross-sectional area of the entire casting system, thereby controlling the casting process filling time in combination with the sprue 2 height.
At this time, the cross-sectional area of each flow passage of the sprue 2 and the runner 3 is not allowed to be suddenly enlarged or reduced to reduce the occurrence of the vortex. Furthermore, the cross-sectional areas of the sprue 2 and runner 3 may also be substantially constant.
Since the circular cross section is likely to generate the vortex, the cross-sectional shape of the sprue 2 is preferably trapezoidal in order to reduce the generation of the vortex when the gating system is filled, as shown in fig. 3. The cross-sectional shape of the sprue 2 may also be polygonal, oval or other non-circular shape.
In order to reduce slag inclusion waste, the casting system for the metal mold gravity casting aluminum piston provided by the embodiment further comprises a filter screen 7, and the filter screen 7 is arranged at the inlet of the cross runner 3, namely close to one end of the sprue 2. The filter screen 7 can reduce the mold filling speed of molten metal and prevent impurities from entering the casting; the filter screen 7 is arranged at one end, close to the sprue 2, of the cross runner 3, splitting of metal liquid flow can be controlled after the metal liquid falls to an outlet of the sprue 2, the metal liquid flow is converged again, then the metal liquid flow enters the cross runner 3 in a sufficiently slow and compact state, and due to the fact that metal liquid surface tension is generated when the metal liquid passes through meshes of the filter screen 7 and the blocking effect of friction force between the filter screen 7 and the metal liquid, flowing of the metal liquid at the bottom of the sprue 2 is blocked, the sprue 2 is completely filled at the early stage of a mold filling process, and accordingly gas entrainment can be reduced.
It will be appreciated by those skilled in the art that the filter screen 7 may also be provided at the top end of the sprue 2 or elsewhere in the runner 3.
Specifically, the filter screen 7 is an aluminum silicate fiber woven screen. The filter screen 7 can also be made of stainless steel or other types of filter screens suitable for casting molten metal.
In order to make the molten metal flow into the bottom of the cavity, in the casting system for the metal mold gravity casting aluminum piston provided in the above embodiment, the bottom end of the ingate 4 is higher than the bottom end of the piston mold 5, and meanwhile, in order to avoid the molten metal from obviously splashing, the distance between the bottom end of the ingate 4 and the bottom end of the piston mold 5 is not more than 10mm, and at this time, the molten metal in the ingate 4 can smoothly fill the cavity by means of gravity, so that a casting with good quality is obtained.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A casting system for a metal mold gravity cast aluminum piston, comprising:
a pouring cup (1);
the top end of the sprue (2) is communicated with the outlet of the sprue cup (1), and the sprue (2) extends in the vertical direction;
the horizontal pouring channel (3) is communicated with the bottom end of the straight pouring channel (2), and the horizontal pouring channel (3) extends along the horizontal direction; and
the inlet is communicated with the outlet of the cross pouring channel (3), and the outlet is communicated with the inner pouring channel (4) of the cavity of the piston mold (5);
the cross-sectional areas of the sprue (2), the cross gate (3) and the ingate (4) are sequentially increased, and the cross-sectional area refers to the minimum cross-sectional area perpendicular to the liquid flow direction.
2. The gating system for a metal mold gravity cast aluminum piston according to claim 1, wherein the ratio of the sizes of the cross-sectional areas of the sprue (2), the cross runner (3) and the ingate (4) is 1:1.8: 2.
3. The system of claim 1, further comprising an insulated riser (6) disposed at the top of the piston mold (5).
4. A casting system for a metal mold gravity cast aluminum piston according to claim 3, wherein the inlet of the pouring cup (1) is funnel-shaped with one side diverging.
5. A casting system for a metal mold gravity cast aluminum piston according to claim 4, characterized in that the axis of the sprue (2) is angled 2-4 ° from the axis of the piston mold (5).
6. The casting system for the metal mold gravity casting aluminum piston according to claim 1, wherein the sprue (2) and the cross runner (3) are variable cross-section runners, the sprue (2) is gradually reduced in cross-sectional area from an inlet to an outlet, and the cross runner (3) is gradually increased in cross-sectional area from the inlet to the outlet;
the ingate (4) is a flow passage with equal cross section.
7. A gating system for a metal mold gravity cast aluminum piston according to claim 6, wherein the cross-sectional shape of the sprue (2) is trapezoidal.
8. The gating system for a metal mold gravity cast aluminum piston according to claim 1, further comprising a filter screen (7), wherein the filter screen (7) is provided at an inlet of the runner (3).
9. A casting system for a metal type gravity cast aluminium piston according to claim 8, characterized in that the filter mesh (7) is a woven mesh of aluminium silicate fibres.
10. A gating system for a metal mold gravity cast aluminum piston according to any one of claims 1 to 9, wherein the bottom end of the ingate (4) is higher than the bottom end of the piston mold (5), and the distance between the bottom end of the ingate (4) and the bottom end of the piston mold (5) does not exceed 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220363282 CN202725962U (en) | 2012-07-25 | 2012-07-25 | Casting system for metal mold gravity casting aluminum piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220363282 CN202725962U (en) | 2012-07-25 | 2012-07-25 | Casting system for metal mold gravity casting aluminum piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202725962U true CN202725962U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220363282 Expired - Lifetime CN202725962U (en) | 2012-07-25 | 2012-07-25 | Casting system for metal mold gravity casting aluminum piston |
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| CN (1) | CN202725962U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102744370A (en) * | 2012-07-25 | 2012-10-24 | 湖南江滨机器（集团）有限责任公司 | Pouring system for permanent mold gravity casting aluminum piston |
| CN103639369A (en) * | 2013-12-25 | 2014-03-19 | 湖南江滨机器（集团）有限责任公司 | Piston casting method and mould |
| CN104815964A (en) * | 2015-04-30 | 2015-08-05 | 共享装备有限公司 | Gating system capable of solving inner runner inflow unevenness |
| CN106077493A (en) * | 2016-08-25 | 2016-11-09 | 四川南车共享铸造有限公司 | A kind of running gate system for casting diesel-engine body foundry goods |
-
2012
- 2012-07-25 CN CN 201220363282 patent/CN202725962U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102744370A (en) * | 2012-07-25 | 2012-10-24 | 湖南江滨机器（集团）有限责任公司 | Pouring system for permanent mold gravity casting aluminum piston |
| CN103639369A (en) * | 2013-12-25 | 2014-03-19 | 湖南江滨机器（集团）有限责任公司 | Piston casting method and mould |
| CN103639369B (en) * | 2013-12-25 | 2016-01-20 | 湖南江滨机器（集团）有限责任公司 | A kind of method for casting piston and casting for piston mould |
| CN104815964A (en) * | 2015-04-30 | 2015-08-05 | 共享装备有限公司 | Gating system capable of solving inner runner inflow unevenness |
| CN106077493A (en) * | 2016-08-25 | 2016-11-09 | 四川南车共享铸造有限公司 | A kind of running gate system for casting diesel-engine body foundry goods |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |
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| CX01 | Expiry of patent term |