CN113857433A - Gating system for metal casting - Google Patents
Gating system for metal casting Download PDFInfo
- Publication number
- CN113857433A CN113857433A CN202111150699.6A CN202111150699A CN113857433A CN 113857433 A CN113857433 A CN 113857433A CN 202111150699 A CN202111150699 A CN 202111150699A CN 113857433 A CN113857433 A CN 113857433A
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- China
- Prior art keywords
- runner
- cross
- sprue
- width
- bottom portion
- Prior art date
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- Pending
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- 238000005058 metal casting Methods 0.000 title claims abstract description 19
- 239000002893 slag Substances 0.000 claims abstract description 49
- 238000005266 casting Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
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
- B22C9/082—Sprues, pouring cups
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to a pouring system for metal casting, which comprises a pouring cup, wherein the bottom of the pouring cup is communicated with one end of a sprue, the bottom of the sprue is hemispherical, the bottom of the sprue penetrates through one end of the first cross gate, the sprue is communicated with the first cross gate, the side part of the first cross gate is in a trapezoidal table shape, a trapezoidal slag collecting bag is arranged on the first cross gate, the upper bottom part of the slag collecting bag faces the direction of the sprue cup, a trapezoidal second cross gate is arranged at the other end of the first cross gate, and the upper bottom part of the second horizontal pouring channel faces the direction of the pouring cup, the cross section area of the cross section of the first horizontal pouring channel is equal to that of the cross section of the second horizontal pouring channel, and the width of the first cross gate is larger than that of the second cross gate, the height of the first cross gate is lower than that of the second cross gate, and the length of the second cross gate is not less than 60 mm.
Description
Technical Field
The invention relates to the field of metal casting, in particular to a pouring system for metal casting.
Background
The casting gating system is built by applying the hydraulics principle and is gradually improved.
1. Pouring system
The passage in the mold that directs the liquid metal into the mold cavity is called the gating system. The pouring system comprises a pouring cup, a cross gate, a flow blocking sheet, an inner pouring gate and the like.
2. Horizontal pouring channel
The purpose of the runner is mainly to slow down the flow of liquid metal and to avoid the slag from entering the impression.
3. Design of cross runners
The runner data is obtained from either a relationship of the ingate cross-sectional area or a look-up table (see casting handbook).
The relation of the sectional area of the inner sprue:
in the formula
A < - - - - - -minimum flow control area of in-gate (& cm & lt)2)
G- -weight (kg) of molten metal flowing through the ingate;
u-flow loss factor of the gating system;
t-the time(s) to fill the cavity;
hp- -average static pressure head height (cm).
The cross-sectional area data of the transverse pouring channel is obtained by multiplying the cross-sectional area of the inner pouring gate by a coefficient of 1.1-1.5.
The cross runners for the casting process are various and multipurpose, and castings cast by the cross runners designed by the method have fewer defects.
Disclosure of Invention
The invention mainly aims to provide a metal casting gating system which is different from the design of the transverse pouring gate, and impurities (or slag in molten metal) in the transverse pouring gate can quickly rise by using the gating system, so that the impurities are prevented from entering a casting.
In order to accomplish the above object, the present invention provides a metal casting gating system, comprising a sprue cup, wherein the bottom of the sprue cup is communicated with one end of a sprue, the bottom of the sprue is hemispherical, the bottom of the sprue penetrates through one end of the first cross gate, the sprue is communicated with the first cross gate, the side part of the first cross gate is in a trapezoidal table shape, a trapezoidal slag collecting bag is arranged on the first cross gate, the upper bottom part of the slag collecting bag faces the direction of the sprue cup, a trapezoidal second cross gate is arranged at the other end of the first cross gate, and the upper bottom part of the second horizontal pouring channel faces the direction of the pouring cup, the cross section area of the cross section of the first horizontal pouring channel is equal to that of the cross section of the second horizontal pouring channel, and the width of the first cross gate is larger than that of the second cross gate, the height of the first cross gate is lower than that of the second cross gate, and the length of the second cross gate is not less than 60 mm.
Preferably, one end of the first runner, which is communicated with the sprue, is in a semicircular plate shape, and one end of the first runner, which is communicated with the second runner, is in a square plate shape.
Further preferably, the width of the upper bottom part of the slag collecting bag is equal to the width of the upper bottom part of the second cross gate, and the width of the lower bottom part of the slag collecting bag is equal to the width of the lower bottom part of the second cross gate.
Still further preferably, the length of the central axis of the sprue from the side of the slag trap closer to the sprue is half the width of the lower bottom portion of the first runner.
It is further preferred that the shortest length of the pack adjacent the second runner is equal to the longest length of the second runner coinciding with the first runner.
It is further preferred that the sum of the height of the slag trap and the height of the first runner is equal to the height of the second runner.
It is further preferred that the shortest length of the pack adjacent the second runner is less than 3mm than the width of the upper bottom portion of the first runner.
Still further preferably, the width of the upper bottom portion of the first runner is less than the width of the lower bottom portion of the first runner by 4 mm.
Still further preferably, the sprue has a diameter half of the width of the lower bottom portion of the first runner.
Still further preferably, the casting gating system is designed by the following method:
the cross-sectional area of the cross-section of the first runner is equal to the cross-sectional area of the cross-section of the second runner, i.e.: (W)1+W2)xH3/2＝(B1+B2)xH1/2；
L1≥60mm；
L2＝L3＝W2-3mm；
H1＝H2+H3；
W3＝W1/2；
D＝W2/2；
W1＝W2+4mm；
In the formula:
W1is the width of the lower bottom portion of the first cross runner;
W2is the width of the upper bottom portion of the first runner;
W3the shortest length between the central axis of the sprue and the slag collecting ladle is shown;
B1the widths of the slag collecting bag and the upper bottom part of the second cross pouring channel are respectively;
B2the widths of the slag collection bag and the lower bottom part of the second cross pouring channel are respectively;
H1the height of the second cross runner;
H2is the height of the slag collecting bag;
H3the height of the first cross runner;
d is the diameter of the sprue;
L1is the length of the second runner;
L2the shortest length between the slag collecting bag and the second cross pouring channel;
L3is the maximum linear length of the second runner coinciding with the first runner.
The invention has the beneficial effects that:
according to the invention, the cross sections of the first cross gate and the second cross gate are equal, meanwhile, the width of the first cross gate is wider than that of the second cross gate, the height of the first cross gate is lower than that of the second cross gate, and meanwhile, the first cross gate is provided with the slag collecting bag, so that the metal solution entering the first cross gate is filled with the slag collecting bag preferentially, and thus, impurities in the metal solution flowing into the second cross gate can be reduced, and the yield of metal castings is improved.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural view of a gating system of the present invention;
FIG. 2 is a front view of the gating system of the present invention;
FIG. 3 is a top view of the casting system of the present invention;
fig. 4 is a right side view of the casting system of the present invention.
Description of the reference numerals
10. A sprue; 20. a first runner; 30. collecting a slag ladle; 40. a second runner;
B-B, the cross section of the first runner; A-A, the cross section of the second cross runner;
W1is the width of the lower bottom portion of the first cross runner;
W2is the width of the upper bottom portion of the first runner;
W3the shortest length between the central axis of the sprue and the slag collecting ladle is shown;
B1the widths of the slag collecting bag and the upper bottom part of the second cross pouring channel are respectively;
B2the widths of the slag collection bag and the lower bottom part of the second cross pouring channel are respectively;
H1the height of the second cross runner;
H2is the height of the slag collecting bag;
H3the height of the first cross runner;
L1is the length of the second runner;
L2the shortest length between the slag collecting bag and the second cross pouring channel;
L3is the maximum linear length of the second runner coinciding with the first runner.
Detailed Description
The technical solution in the embodiments of the present invention is clearly and completely described below with reference to the drawings in the embodiments of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1, in order to accomplish the above object, the present embodiment provides a metal casting gating system, which includes a pouring cup (not shown), the bottom of the pouring cup is communicated with one end of a sprue 10, and the bottom of the sprue 10 is shaped like a hemisphere, so that molten metal forms a turbulent region at the bottom of the sprue 10, and the turbulent region has a certain buffer effect on the flow rate of molten metal. The bottom of the sprue 10 penetrates through one end of the first runner 20, and the sprue 10 communicates with the first runner 20, and preferably, the diameter of the sprue 10 is half of the width of the lower bottom portion of the first runner 20. In addition, in the present embodiment, the end of the first runner 20 communicating with the sprue 10 is formed in a semicircular plate shape, and this shape also has a certain buffer effect on the molten metal charged in the first runner 20.
The side portion of the first runner 20 is in a step shape, the first runner 20 is provided with a slag collecting bag 30 in a step shape, the slag collecting bag 30 is used for collecting impurities flowing into the first runner 20, certain impurities may exist in the initially poured molten metal during the pouring process, the impurities are formed for various reasons, the reason is not described in detail in this embodiment, and the slag collecting bag 30 is used for collecting the impurities. The upper bottom of the slag collecting ladle 30 faces the pouring cup direction, the other end of the first runner 20 is provided with a second runner 40 in a ladder shape, and preferably, one end of the first runner 20 communicated with the second runner 40 is in a square plate shape. The upper bottom part of the second runner 40 faces the direction of the pouring cup, the cross section B-B of the first runner 20 has the same sectional area as that of the cross section A-A of the second runner 40, the width of the first runner 20 is larger than that of the second runner 40, and the height of the first runner 20 is lower than that of the second runner 40, wherein the length of the second runner is not less than 60 mm. Due to the arrangement, the mold filling speed of the first runner 20 is higher than that of the second runner 40, so that the buoyancy of the molten metal in the first runner 20 is higher than that of the molten metal in the second runner 40, and impurities in the first runner 20 enter the slag collecting bag 30.
In the present embodiment, the width of the upper bottom portion of the slag trap 30 is equal to the width of the upper bottom portion of the second runner 40, and the width of the lower bottom portion of the slag trap 30 is equal to the width of the lower bottom portion of the second runner 40. That is, the inclination of the slag trap 30 is slightly greater than that of the second runner 40, so that the floating speed of the impurities is high, and the impurities in the first runner 20 are prevented from flowing into the second runner 40.
In the present embodiment, the length of the central axis of the sprue 10 from the side of the slag trap 30 near the sprue 10 is half the width of the lower bottom portion of the first runner 20. As shown in fig. 3 and 4, that is, W3＝W1And/2, which allows the molten metal flowing out of the turbulent zone at the bottom of the sprue 10 to have a sufficient buffering time in the first runner 20.
In this embodiment, the shortest length of the pack 30 adjacent the second runner 40 is equal to the longest length of the second runner 40 coincident with the first runner 20. That is, as shown in FIG. 2, L2＝L3So that a sufficient length is maintained between the first runner 20 and the second runner 40 so that the molten metal filling rate in the first runner 20 is greater than the filling rate in the second runner 40.
In this embodiment, the sum of the height of the pack 30 and the height of the first runner 20 is equal to the height of the second runner 40. That is, as shown in FIG. 2, H1＝H2+H3Is set as above (L)2＝L3) The filling speed of the second runner 40 is not too slow, so that the molten metal in the second runner 40 is prevented from being cooled too fast.
In this embodiment, the shortest length of the pack 30 adjacent the second runner 40 is 3mm less than the width of the upper bottom portion of the first runner 20. That is, as shown in FIGS. 2 and 3Shown as L2＝L3＝W23mm, and this arrangement is also intended to ensure that the first runner 20 has a sufficient length to allow impurities in the molten metal to flow into the slag ladle 30.
Still further preferably, the width of the upper bottom portion of the first runner is less than the width of the lower bottom portion of the first runner by 4 mm. That is, as shown in FIG. 4, W1＝W2+4mm for the avris position of first runner 20 has certain inclination, if undersize, is unfavorable for the come-up of impurity, if too big, makes impurity come-up too fast, thereby makes the impurity adhesion at the surface of die cavity, thereby flows into and does not advance in the scum bag 30.
In summary, the design method of the casting gating system of the present embodiment should satisfy the following relation:
the cross section area B-B of the cross section of the first runner is equal to the cross section area A-A of the cross section of the second runner, namely: (W)1+W2)xH3/2＝(B1+B2)xH1/2；
L1≥60mm；
L2＝L3＝W2-3mm；
H1＝H2+H3；
W3＝W1/2；
D＝W2；
W1＝W2+4mm；
In the formula:
W1is the width of the lower bottom portion of the first cross runner;
W2is the width of the upper bottom portion of the first runner;
W3the shortest length between the central axis of the sprue and the slag collecting ladle is shown;
B1the widths of the slag collecting bag and the upper bottom part of the second cross pouring channel are respectively;
B2the widths of the slag collection bag and the lower bottom part of the second cross pouring channel are respectively;
H1is as followsThe height of the two horizontal runners;
H2is the height of the slag collecting bag;
H3the height of the first cross runner;
L1is the length of the second runner;
L2the shortest length between the slag collecting bag and the second cross pouring channel;
L3is the maximum linear length of the second runner coinciding with the first runner.
In addition, it should be noted that this embodiment merely provides another design of the gating system, and other components can be processed according to specific casting process parameters, such as the arrangement of the ingate, the arrangement of the sprue, the arrangement of the pouring cup, and the like.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (10)
1. The pouring system for metal casting is characterized by comprising a pouring cup, wherein the bottom of the pouring cup is communicated with one end of a sprue, the bottom of the sprue is hemispheroid, the bottom of the sprue penetrates out of one end of a first runner, the sprue is communicated with the first runner, the side part of the first runner is in a trapezoidal platform shape, a slag collecting ladle in a trapezoidal shape is arranged on the first runner, the upper bottom part of the slag collecting ladle faces the pouring cup direction, a second runner in a trapezoidal shape is arranged at the other end of the first runner, the upper bottom part of the second runner faces the pouring cup direction, the sectional area of the cross section of the first runner is equal to that of the cross section of the second runner, and the width of the first runner is larger than that of the second runner, the height of the first runner is lower than that of the second runner, wherein the length of the second runner is not less than 60 mm.
2. The metal casting gating system according to claim 1, wherein an end of the first runner that communicates with the sprue is formed in a semicircular plate shape, and an end of the first runner that communicates with the second runner is formed in a square plate shape.
3. The metal casting gating system of claim 2, wherein the width of the upper bottom portion of the slag ladle is equal to the width of the upper bottom portion of the second runner, and the width of the lower bottom portion of the slag ladle is equal to the width of the lower bottom portion of the second runner.
4. The metal casting gating system according to claim 3, wherein a length of a central axis of the sprue from a side of the slag trap closer to the sprue is half a width of a lower bottom portion of the first runner.
5. The metal casting gating system of claim 4, wherein a shortest length of the pack adjacent the second runner is equal to a longest length of the second runner that coincides with the first runner.
6. The metal casting gating system of claim 5, wherein a sum of a height of the slag trap and a height of the first runner is equal to a height of the second runner.
7. The metal casting gating system of claim 6, wherein a shortest length of the pack adjacent the second runner is less than 3mm than a width of a bottom portion of the first runner.
8. The metal casting gating system of claim 7, wherein a width of the upper bottom portion of the first runner is less than a width of the lower bottom portion of the first runner by 4 mm.
9. The metal casting runner system of claim 8, wherein the sprue has a diameter that is half a width of a lower bottom portion of the first runner.
10. The metal casting gating system of any one of claims 1 to 9, wherein the casting gating system is designed by a method comprising:
the cross-sectional area of the first runner is equal to the cross-sectional area of the second runner,
namely: (W)1+W2)xH3/2＝(B1+B2)xH1/2；
L1≥60mm；
L2＝L3＝W2-3mm；
H1＝H2+H3；
W3＝W1/2；
D＝W2/2；
W1＝W2+4mm；
In the formula:
W1is the width of the lower bottom portion of the first cross runner;
W2is the width of the upper bottom portion of the first runner;
W3the shortest length between the central axis of the sprue and the slag collecting ladle is shown;
B1the widths of the slag collecting bag and the upper bottom part of the second cross pouring channel are respectively;
B2the widths of the slag collection bag and the lower bottom part of the second cross pouring channel are respectively;
H1the height of the second cross runner;
H2is the height of the slag collecting bag;
H3the height of the first cross runner;
d is the diameter of the sprue;
L1is the length of the second runner;
L2the shortest length between the slag collecting bag and the second cross pouring channel;
L3is the maximum linear length of the second runner coinciding with the first runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111150699.6A CN113857433A (en) | 2021-09-29 | 2021-09-29 | Gating system for metal casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111150699.6A CN113857433A (en) | 2021-09-29 | 2021-09-29 | Gating system for metal casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113857433A true CN113857433A (en) | 2021-12-31 |
Family
ID=78992637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111150699.6A Pending CN113857433A (en) | 2021-09-29 | 2021-09-29 | Gating system for metal casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113857433A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000141025A (en) * | 1998-11-05 | 2000-05-23 | Nissan Diesel Motor Co Ltd | Method and device for removing slag in frame |
| CN105689650A (en) * | 2016-04-28 | 2016-06-22 | 江苏锡华铸造有限公司 | Casting gating system with scum riser |
| CN209124844U (en) * | 2018-12-05 | 2019-07-19 | 泉州市恒通机械配件有限公司 | The integrated cast structure of guide wheel for excavator casting |
-
2021
- 2021-09-29 CN CN202111150699.6A patent/CN113857433A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000141025A (en) * | 1998-11-05 | 2000-05-23 | Nissan Diesel Motor Co Ltd | Method and device for removing slag in frame |
| CN105689650A (en) * | 2016-04-28 | 2016-06-22 | 江苏锡华铸造有限公司 | Casting gating system with scum riser |
| CN209124844U (en) * | 2018-12-05 | 2019-07-19 | 泉州市恒通机械配件有限公司 | The integrated cast structure of guide wheel for excavator casting |
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