CN107321924B - Semi-permanent type double-sprue basin combined structure and combined use method thereof - Google Patents
Semi-permanent type double-sprue basin combined structure and combined use method thereof Download PDFInfo
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- CN107321924B CN107321924B CN201710383909.3A CN201710383909A CN107321924B CN 107321924 B CN107321924 B CN 107321924B CN 201710383909 A CN201710383909 A CN 201710383909A CN 107321924 B CN107321924 B CN 107321924B
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- 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
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Abstract
The invention relates to a semi-permanent double-pouring basin combined structure used in casting and pouring in the technical field of casting and a combined use method thereof. In the pouring basin structure, the first pouring basin is used for directly containing pouring liquid poured from a pouring ladle, and the pouring liquid flows into the second pouring basin at a relatively low flow rate through the U-shaped channel, so that a turbulent flow area and a pouring advection area in the pouring basin are separated, and the problem that slag blocking and skimming cannot be carried out due to turbulent flow in the pouring basin is solved.
Description
Technical Field
The invention belongs to the technical field of casting, and particularly relates to a semi-permanent double-pouring basin combined structure used in casting and pouring and a combined use method thereof.
Background
And the pouring basin is arranged on a sand mold of the large casting and is used for containing pouring liquid from a pouring ladle. The conventional method is generally manufactured by using a pouring basin mould for founding, has low inner surface strength and heat resistance, is used for one time, and has high cost.
In the prior art, patent specification with publication number CN 103506579 a entitled "a pouring basin" describes a scheme of a reusable semi-permanent pouring basin, which uses refractory materials to surround and build inside a steel frame, and assists in realizing repeated use of the pouring basin with a ceramic nozzle nest, and simplifies maintenance of the pouring basin. The pouring basin in the form solves the problem of repeated use, but brings about a more serious slag problem. Because the molten metal speed under the free falling body of the ladle is very high, the turbulence, the splashing and the entrainment in the pool type pouring basin are serious, the slagging is further serious, and in addition, the oxidizing slag on the surface of the ladle is poured into the pouring basin, the molten metal in the pouring basin is further seriously mixed. On the other hand, the single-pool flat-bottom structure of the pool type pouring basin enables the pouring basin not to have any slag blocking and skimming functions, and impurities in the molten metal can be soaked into the cavity along with the turbulent molten metal, so that the quality problem of serious impurities of the casting is caused.
Disclosure of Invention
The invention provides a semi-permanent double-pouring basin combined structure and a combined use method thereof, aiming at the problem of serious casting inclusion caused by the problems of turbulence, incapability of slag blocking and skimming in the pouring of a single-pool pouring basin in the prior art, so as to solve the problem that the slag blocking and skimming in the pouring basin can not be realized due to the turbulence.
The invention provides a semi-permanent double-pouring basin combined structure, which comprises a first pouring basin and a second pouring basin which are arranged above a sand mold, wherein a liquid outlet is formed in the bottom of the first pouring basin, a liquid inlet and a liquid outlet are formed in the bottom of the second pouring basin, the liquid outlet of the first pouring basin is communicated with the liquid inlet of the second pouring basin through a U-shaped channel embedded in the sand mold, and the liquid outlet of the second pouring basin is communicated with a straight pouring gate of the sand mold.
In the pouring basin structure, two pouring basins are adopted, the first pouring basin is used for directly containing pouring liquid poured from a pouring ladle, the pouring liquid flows into the second pouring basin at a relatively low flow rate through the U-shaped channel, so that a turbulent flow area and a pouring advection area in the pouring basin are separated, the influence of slag impurities caused by turbulent flow of free falling bodies when the pouring liquid is poured is avoided, and meanwhile, the pouring liquid in a flow inlet area is consistent with the direction of slag inclusion floating from bottom to top from the inflow direction of the U-shaped channel, so that a better scum effect is obtained.
For the installation of the pouring basin, the U-shaped channel is a ceramic pipe channel pre-embedded in the sand mold in advance, one port of the U-shaped channel is in butt joint with a liquid outlet of the first pouring basin, and the other port of the U-shaped channel is in butt joint with a liquid inlet of the second pouring basin.
In order to control the liquid inlet speed in the second pouring basin conveniently, the sectional area of the U-shaped channel is 2-3 times of that of the sprue.
For the used repeatedly of runner basin, first runner basin and second runner basin are semi-permanent formula runner basin structure, including steel frame and bottom plate, the frame inboard is equipped with the firebrick layer with the bottom plate upside, and the liquid outlet position of runner basin is equipped with out the liquid runner nest respectively, the inlet position of second runner basin also is equipped with feed liquor runner nest, the opposite direction of feed liquor runner nest and play liquid runner nest to it is corresponding with the liquid stream direction.
The second purpose of the invention also provides a combined use method of the semi-permanent double-pouring basin combined structure, the first pouring basin and the second pouring basin are correspondingly installed with a sand mold, then pouring is carried out, a liquid outlet of the second pouring basin is blocked by a pouring gate, pouring liquid is added into the first pouring basin through a pouring ladle, the pouring liquid flows into the second pouring basin from the first pouring basin through a U-shaped channel, the pouring gate is pulled out when the pouring liquid level in the second pouring basin rises to 0.6-0.7 times of the total height of an inner cavity of the pouring basin, the pouring gate is started to feed liquid into a sprue, the pouring speed of the pouring ladle to the first pouring basin is adjusted, the liquid level in the two pouring basins is kept stable until the pouring is finished, and the two pouring basins are respectively moved to the displacement larger than the diameter of the U-shaped channel, so as to disconnect the liquid inlet of the two pouring basins and the passage of each liquid outlet.
According to the pouring method, after the pouring liquid flows into the second pouring basin from the first pouring basin under the interception effect of the U-shaped channel, the liquid inlet speed is obviously controlled, the turbulence degree is obviously weakened, the impurity slag in the ladle partially floats upwards in the first pouring basin, the slag content of the pouring liquid flowing into the second pouring basin from the liquid outlet at the bottom is obviously reduced, and then the slag entering the sprue is obviously reduced through the scum treatment of the second pouring basin, so that the problem that the pouring liquid with the existing pouring basin structure cannot block and remove slag due to serious turbulence is solved.
In order to ensure the stable installation of the double-sprue basin structure, when the quicksand molding is carried out before the pouring, a sprue and a U-shaped channel are pre-embedded at corresponding positions of the top of an upper sand mold; after the sand mold is closed, respectively covering plastic films on straight gate openings and U-shaped channel interfaces at the top of the sand mold, respectively placing two to three circles of mud strips around the periphery of each opening, then, cooperatively installing a first gate basin and a second gate basin, and enabling a liquid outlet of the second gate basin to be in concentric butt joint with the straight gate, so that a liquid inlet of the first gate basin and a liquid outlet of the second gate basin are respectively in concentric butt joint with a port of the U-shaped channel; and a plurality of wedge-shaped sizing blocks are inserted between the bottom of the pouring basin and the top of the upper sand mold in a plugging manner so as to ensure the stability of the pouring basin.
In order to improve the scum effect, during pouring, the pouring speed of pouring liquid into the first pouring basin is firstly high and then low, the liquid level in the two pouring basins is firstly quickly raised, and the pouring gate plug is pulled out to start to feed liquid into the sprue and then the pouring speed of pouring liquid into the first pouring basin is slowed down so as to keep the liquid level in the two pouring basins stable.
When pouring liquid begins to pour into the first pouring basin for avoiding pouring ladle, the pouring liquid directly enters the U-shaped channel, and during pouring, the liquid falling point of pouring liquid into the first pouring basin is far away from the liquid outlet of the first pouring basin.
Drawings
Fig. 1 is a schematic diagram of a semi-permanent double-runner basin combination structure of the present invention.
Wherein, 1 is a second pouring basin; 2, blocking a pouring gate; 3, a straight pouring channel; 4, sand molding; 5, casting a ladle; 6 a first runner tub; 7U-shaped channels; 8 casting cavity.
Detailed Description
Example 1
As shown in fig. 1, the semi-permanent double-runner basin combined structure comprises a first runner basin 6 and a second runner basin 1 which are arranged above a sand mold 4, wherein a liquid outlet is arranged at the bottom of the first runner basin 6, a liquid inlet and a liquid outlet are arranged at the bottom of the second runner basin, the liquid outlet of the first runner basin 6 is communicated with the liquid inlet of the second runner basin 1 through a U-shaped channel 7 which is pre-buried in the sand mold 4, the liquid outlet of the second runner basin 1 is communicated with a sprue 3 of the sand mold, and the sprue 3 is communicated with a casting cavity 8 through a pouring system channel.
In the structure of the embodiment, in order to facilitate the installation of the pouring basin, the U-shaped channel 7 is a ceramic pipe channel pre-embedded in the sand mold 4 in advance, one port of the U-shaped channel is in butt joint with a liquid outlet of the first pouring basin 6, and the other port of the U-shaped channel 7 is in butt joint with a liquid inlet of the second pouring basin 1 so as to communicate the first pouring basin with the second pouring basin; in order to control the liquid inlet speed of the second pouring basin conveniently, the sectional area of the U-shaped channel 7 is 2-3 times of that of the sprue 3.
The pouring basin combined structure is suitable for the transformation of pool type pouring basin structures, can be directly transformed and used through two pool type pouring basin structures in the prior art, and does not need to change the original pouring mode and the main structure of the pouring basin. In this embodiment, for reducing pouring cost, make runner basin ability used repeatedly many times, first runner basin 6 and the second runner basin 2 of this embodiment all adopt half permanent formula runner basin structure, be CN 103506579A's runner basin structure like disclosing, including steel frame and bottom plate, the frame inboard is equipped with the firebrick layer with the bottom plate upside, the liquid outlet position of two runner basins is equipped with out liquid runner nest respectively, the inlet position of second runner basin also is equipped with feed liquor runner nest, feed liquor runner nest sets up opposite direction with going out liquid runner nest structure is the same, and corresponding with the flow direction.
In the pouring basin structure of the embodiment, two pouring basins are adopted, the first pouring basin 6 is used for directly containing pouring liquid poured from the pouring ladle 5, the pouring liquid flows into the second pouring basin 1 through the U-shaped channel 7 at a relatively low flow rate, so that a turbulent flow area in the pouring basin is separated from a pouring horizontal flow area, the influence of slag inclusion caused by turbulent flow of free falling bodies when the pouring liquid is poured is avoided, and meanwhile, the pouring liquid in the pouring horizontal flow area (the pouring liquid in the second pouring basin) flows into the U-shaped channel 7 from bottom to top in the same direction as the floating direction of the slag inclusion, so that a better scum effect is obtained. Therefore, the transformation of the double-pouring basin combined structure solves the problem that the pouring liquid of the existing pouring basin structure cannot block and remove slag due to serious turbulence, and improves the quality and the qualification rate of castings.
Example 2
The embodiment is a combined use method of the semi-permanent double-sprue basin combined structure, and specifically, when sand flowing molding is performed before pouring, a sprue 3 and a U-shaped channel ceramic tube are pre-embedded at corresponding positions on the top of an upper sand mold 4; after the sand mold is closed, covering plastic films on the interface of the sprue 3 and the interface of the U-shaped channel 7 at the top of the sand mold respectively, and then placing two to three circles of mud strips around the periphery of each interface respectively so as to seal the periphery of the interface after the pouring basin is placed and prevent fire from running out during pouring; then, the first pouring basin 6 and the second pouring basin 1 are matched, aligned and placed on the upper portion of the sand mold 3, and when the first pouring basin 6 and the second pouring basin 1 are aligned, a liquid outlet of the second pouring basin 1 is in concentric butt joint with a straight pouring gate, so that a liquid inlet of the first pouring basin 6 and a liquid outlet of the second pouring basin 1 are in concentric butt joint with two ports of the U-shaped channel 7 respectively; in order to stabilize the pouring basin, a plurality of wedge-shaped sizing blocks are inserted between the bottom of the pouring basin and the top of the sand mold 3 in a plugging manner so as to prevent the pouring basin from shaking. After the pouring basin is installed, pouring preparation is carried out, a liquid outlet of a second pouring basin 1 is blocked by a pouring plug 2, then a pouring ladle 5 is poured to add pouring liquid into a first pouring basin 6, so that the pouring liquid flows into the second pouring basin 1 from the first pouring basin 6 through a U-shaped channel 7, when the pouring liquid level in the second pouring basin 1 rises to 0.6-0.7 times of the total height of an inner cavity of the pouring basin, the pouring plug 2 is pulled out to start liquid inlet pouring to a sprue 3, the pouring speed of the pouring ladle 5 to the first pouring basin 6 is adjusted at the same time, the liquid levels in the two pouring basins are kept stable until the pouring is finished, the two pouring basins are respectively moved to the displacement larger than the diameter of the U-shaped channel, so that the liquid inlets of the two pouring basins and the channels of the liquid outlets are disconnected, and the pouring basin cannot be moved after the.
In order to reduce slag inclusion from entering the second pouring basin, pouring liquid into the first pouring basin 6 during pouring, wherein a liquid dropping point is far away from a liquid outlet of the first pouring basin 6 so as to prevent the originally poured turbulent flow liquid with slag entrapment from directly entering the U-shaped channel 7; the liquid pouring speed is controlled according to the first-speed and second-speed control, the liquid level in the two pouring basin rises quickly, when the liquid level of the first pouring basin rises to 0.6-0.7 times of the total height of the inner cavity of the pouring basin, the pouring plug 3 is pulled out, liquid is poured into the sprue channel, and the speed of pouring liquid into the first pouring basin 6 is slowed down to keep the liquid level in the two pouring basins stable.
According to the pouring method, after the pouring liquid flows into the second pouring basin 1 from the first pouring basin 6 through the interception effect of the U-shaped channel 7, the liquid inlet speed is obviously controlled, the turbulence degree is obviously weakened, the impurity slag in the ladle partially floats upwards in the first pouring basin 6, the slag content in the pouring liquid flowing into the second pouring basin 1 from the liquid outlet at the bottom is obviously reduced, and then the slag entering the straight pouring gate is obviously reduced through the scum treatment of the second pouring basin, so that the problem that the pouring liquid with the conventional pouring basin structure cannot block and remove slag due to serious turbulence is solved.
The double-runner basin structure is not limited to the above embodiment, the U-shaped channel for connecting the double-runner basins can be adjusted to be a connecting channel with other structural shapes according to needs, and the connecting channel can be embedded in a sand mold, or can be embedded in another separately arranged sand mold structure or sand mold part convenient for communicating the two runner basins.
Claims (8)
1. The utility model provides a semi-permanent formula double-gate basin integrated configuration, is including arranging first runner basin and the second runner basin in the sand mould top in, first runner pelvic floor portion is equipped with the liquid outlet, second runner pelvic floor portion is equipped with inlet and liquid outlet, its characterized in that, the liquid outlet of first runner basin and the inlet of second runner basin are through pre-buried U-shaped channel intercommunication in the sand mould, the vertical setting of two links of U-shaped channel communicates respectively first runner basin and second runner basin, the liquid outlet of second runner basin and the sprue intercommunication of the vertical direction of sand mould.
2. The semi-permanent double-pouring basin combined structure according to claim 1, wherein the U-shaped channel is a ceramic pipe channel pre-embedded in a sand mold in advance, one port of the U-shaped channel is in butt joint with a liquid outlet of a first pouring basin, and the other port of the U-shaped channel is in butt joint with a liquid inlet of a second pouring basin.
3. The semi-permanent dual sprue basin combination according to claim 1 wherein the cross-sectional area of the U-shaped channel is 2-3 times the cross-sectional area of the sprue.
4. The semi-permanent double-runner basin combined structure as claimed in claim 1, wherein the first runner basin and the second runner basin are both of a semi-permanent runner basin structure and comprise a steel outer frame and a bottom plate, refractory brick layers are arranged on the inner side of the outer frame and the upper side of the bottom plate, liquid outlet positions of the runner basins are respectively provided with a liquid outlet runner pit, a liquid inlet runner pit is also arranged on a liquid inlet position of the second runner basin, and the liquid inlet runner pit and the liquid outlet runner pit are opposite in direction and correspond to the liquid flow direction.
5. A method for using the combination of the semi-permanent double-pouring basin combination structure as defined in any one of claims 1-4, it is characterized in that the first pouring basin and the second pouring basin are installed corresponding to the sand mold, then pouring is carried out, the liquid outlet of the second pouring basin is blocked by a pouring plug, pouring liquid is added into the first pouring basin through the pouring ladle, so that the pouring liquid flows into the second pouring basin from the first pouring basin through the U-shaped channel, the pouring gate plug is pulled out to start liquid feeding pouring to the sprue when the pouring liquid level in the second pouring basin rises to 0.6-0.7 times of the total height of the inner cavity of the pouring basin, simultaneously, the pouring speed of the ladle to the first pouring basin is adjusted, the liquid levels in the two pouring basins are kept stable until the pouring is finished, the two pouring basins are respectively moved to the displacement larger than the diameter of the U-shaped channel, so as to disconnect the liquid outlet of the first pouring basin from the liquid inlet of the second pouring basin and the connecting channel of the liquid inlet of the second pouring basin and the straight pouring gate.
6. The combined use method of the semi-permanent type double-sprue basin combined structure according to claim 5, wherein when the quicksand molding is performed before the pouring, a sprue and a U-shaped channel are pre-embedded at corresponding positions of the top of an upper sand mold; after the sand mold is closed, respectively covering plastic films on straight gate openings and U-shaped channel interfaces at the top of the sand mold, respectively placing two to three circles of mud strips around the periphery of each opening, then, cooperatively installing a first gate basin and a second gate basin, and enabling a liquid outlet of the second gate basin to be in concentric butt joint with the straight gate, so that a liquid inlet of the first gate basin and a liquid outlet of the second gate basin are respectively in concentric butt joint with a port of the U-shaped channel; and a plurality of wedge-shaped sizing blocks are inserted between the bottom of the pouring basin and the top of the upper sand mold in a plugging manner so as to ensure the stability of the pouring basin.
7. The combined use method of the semi-permanent double-pouring basin combined structure according to claim 5 or 6, characterized in that during pouring, the pouring speed of the pouring liquid into the first pouring basin is fast and then slow, the liquid level in the two pouring basins is fast raised, the pouring plug is pulled out, the liquid is fed into the sprue channel, and then the pouring speed of the pouring liquid into the first pouring basin is slowed down so as to keep the liquid level in the two pouring basins stable.
8. The combined use method of the semi-permanent double-pouring basin combined structure according to claim 5 or 6, wherein a liquid falling point of pouring liquid into the first pouring basin is far away from a liquid outlet of the first pouring basin during pouring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710383909.3A CN107321924B (en) | 2017-05-26 | 2017-05-26 | Semi-permanent type double-sprue basin combined structure and combined use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710383909.3A CN107321924B (en) | 2017-05-26 | 2017-05-26 | Semi-permanent type double-sprue basin combined structure and combined use method thereof |
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| CN107321924A CN107321924A (en) | 2017-11-07 |
| CN107321924B true CN107321924B (en) | 2020-09-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111250662B (en) * | 2020-01-21 | 2021-05-25 | 三鑫重工机械有限公司 | Contact type casting positioning device for castings |
| CN113523194B (en) * | 2021-07-24 | 2022-09-06 | 共享装备股份有限公司 | Staggered pouring structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103506579A (en) * | 2013-09-18 | 2014-01-15 | 宁夏共享集团有限责任公司 | Pouring basin |
| CN103537659A (en) * | 2013-11-14 | 2014-01-29 | 宁夏共享集团有限责任公司 | Slag blocking pouring basin |
| CN204052803U (en) * | 2014-07-18 | 2014-12-31 | 天津市宏达铸造厂 | A kind of anti-clogging skim gate basin |
| US20170106434A1 (en) * | 2015-10-15 | 2017-04-20 | GM Global Technology Operations LLC | Method to improve riser feedability for semi-permanent mold casting of cylinder heads |
-
2017
- 2017-05-26 CN CN201710383909.3A patent/CN107321924B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103506579A (en) * | 2013-09-18 | 2014-01-15 | 宁夏共享集团有限责任公司 | Pouring basin |
| CN103537659A (en) * | 2013-11-14 | 2014-01-29 | 宁夏共享集团有限责任公司 | Slag blocking pouring basin |
| CN204052803U (en) * | 2014-07-18 | 2014-12-31 | 天津市宏达铸造厂 | A kind of anti-clogging skim gate basin |
| US20170106434A1 (en) * | 2015-10-15 | 2017-04-20 | GM Global Technology Operations LLC | Method to improve riser feedability for semi-permanent mold casting of cylinder heads |
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| CN107321924A (en) | 2017-11-07 |
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Address after: 750000 No. 298 South st street, Yinchuan economic and Technological Development Zone, the Ningxia Hui Autonomous Region, China Applicant after: KOCEL INTELLIGENT EQUIPMENT Co.,Ltd. Address before: 750000 No. 298 South st street, Yinchuan economic and Technological Development Zone, the Ningxia Hui Autonomous Region, China Applicant before: NINGXIA KOCEL MOULD Co.,Ltd. |
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