CN107774913B - Pouring basin for sand mold and manufacturing method thereof - Google Patents
Pouring basin for sand mold and manufacturing method thereof Download PDFInfo
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- CN107774913B CN107774913B CN201710954954.XA CN201710954954A CN107774913B CN 107774913 B CN107774913 B CN 107774913B CN 201710954954 A CN201710954954 A CN 201710954954A CN 107774913 B CN107774913 B CN 107774913B
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- molten iron
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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 application provides a runner basin for sand mould includes: the molten iron containing cavity is formed by enclosing the basin wall, the top of the molten iron containing cavity is provided with a molten iron inlet, and the bottom of the molten iron containing cavity is provided with a molten iron outlet; the supporting frame is arranged at the top of the molten iron accommodating cavity; the slag stopping cylinder is hung on the supporting frame and provided with a top end and a bottom end which are opposite and communicated, and the bottom end of the slag stopping cylinder is aligned with the molten iron outlet and is spaced from the bottom surface of the molten iron accommodating cavity; and a gate plug extendable through the slag trap barrel and the molten iron outlet to the outside of the molten iron receiving cavity, the gate plug sealing the sprue inlet of the sand mold. An object of the application is to provide a runner basin that can effectively keep off slag. The application also provides a manufacturing method of the pouring basin.
Description
Technical Field
The present application relates to a pouring basin for a sand mold and methods of making and using the same.
Background
Casting refers to a processing mode of melting solid metal into liquid state, pouring the liquid metal into a mold with a specific shape, and solidifying and forming the liquid metal, and aims to obtain the structural shape of a part.
The pouring basin is connected with the top end of a sprue of a pouring system in the sand mould and is used for receiving and guiding a container of molten metal, so that the molten metal flows into the sprue after reaching a proper pouring speed. Especially for iron castings, a certain amount of liquid can be ensured in the pouring basin, the depth of the liquid is large, the molten iron can be prevented from being broken in the pouring process, vortex can be prevented, and the quality of the molten iron can be ensured.
The pouring basin is a throat part in the whole pouring process, and the quality of the pouring basin has important influence on the quality of a casting; for the traditional production method, one or more disposable pouring basin(s) made of molding sand are used before casting and mould assembling, and the pouring basin(s) can be used only once, so that the cost is high, the efficiency is low, and meanwhile, the problems of sand washing and the like are easy to occur due to weak high-temperature impact resistance. Particularly, the slag cannot be effectively blocked, and dross slag in molten iron easily enters a cavity of a sand mold, so that the defect of casting slag inclusion is easily caused.
Disclosure of Invention
To solve the problems in the related art, the present application aims to provide a pouring basin capable of effectively blocking slag.
The application provides a runner basin for sand mould includes: the molten iron containing cavity is formed by enclosing the basin wall, the top of the molten iron containing cavity is provided with a molten iron inlet, and the bottom of the molten iron containing cavity is provided with a molten iron outlet; the supporting frame is arranged at the top of the molten iron accommodating cavity; the slag stopping cylinder is hung on the supporting frame and provided with a top end and a bottom end which are opposite and communicated, and the bottom end of the slag stopping cylinder is aligned with the molten iron outlet and is spaced from the bottom surface of the molten iron accommodating cavity; and a gate plug extendable through the slag trap barrel and the molten iron outlet to the outside of the molten iron receiving cavity, the gate plug sealing the sprue inlet of the sand mold.
According to the application, the tub wall comprises an inner wall and an outer wall covering the inner wall, the outer wall being made of sheet metal, the inner wall being made of refractory cement.
According to the application, the internal surface of outer wall is provided with a plurality of interval arrangement's strengthening rib, and the strengthening rib extends into in the inner wall.
According to this application, the strengthening rib includes that horizontal pole and one end are fixed at the montant in the middle part of horizontal pole, and the internal surface at the outer wall is fixed to the other end of montant, and the horizontal pole is buried in the inner wall.
According to the present application, the nozzle block includes a spherical sealing portion and a handle connected to the spherical sealing portion, the handle extending through a bottom end and a top end of the slag trap barrel.
According to the application, the sprue inlet is configured as a funnel-shaped ceramic tube, and the spherical sealing portion abuts against the flaring end attached to the funnel-shaped ceramic tube.
According to the application, the size of the molten iron outlet is more than 30mm larger than the flared end of the funnel-shaped ceramic tube.
According to the application, the distance from the bottom end of the slag stopping cylinder to the bottom surface of the molten iron containing cavity is 10mm to 100 mm.
The application also provides a manufacturing method of the pouring basin, which comprises the following steps:
s10, providing a basin wall enclosing a molten iron containing cavity, wherein the top of the molten iron containing cavity is provided with a molten iron inlet, the bottom of the molten iron containing cavity is provided with a molten iron outlet, and the molten iron outlet is aligned to a sprue gate inlet of a sand mold;
s20, arranging a support frame at the position of the molten iron inlet corresponding to the molten iron outlet, suspending a slag stopping cylinder on the support frame, wherein the bottom end of the slag stopping cylinder is aligned with the molten iron outlet and is spaced from the bottom surface of the molten iron containing cavity;
and S30, arranging a water gap plug through the slag stopping cylinder, wherein the water gap plug seals the sprue inlet of the sand mold.
According to the present application, step S10 includes providing an outer wall, placing a runner pot mold inside the outer wall, filling a gap between the inner surface of the outer wall and the runner pot mold with refractory cement, and removing the runner pot mold after tamping, drying the refractory cement to form an inner wall, the outer wall and the inner wall together forming a pot wall.
According to the present application, step S10 further includes, after sanding the surface of the inner wall with sand paper, applying a high temperature resistant coating to the surface of the inner wall, and allowing the entire runner pot to naturally harden for more than two weeks.
According to the application, the step of applying the high temperature resistant coating includes applying a two-pass penetration coating and applying a one-pass hang-up coating.
The beneficial technical effect of this application lies in:
the utility model provides a runner basin is because the bottom of its pushing off the slag section of thick bamboo aligns and holds the bottom surface spaced apart in chamber with the molten iron export, before the molten iron that pours into does not reach the definite volume that the molten iron held the chamber, the sprue entry of mouth of a river stifled sealed sand mould always, when the molten iron reaches the definite volume that the molten iron held the chamber, pull out the mouth of a river stifled, the molten iron begins to pass the clearance between the bottom of pushing off the slag section of thick bamboo and the bottom surface that the molten iron held the chamber and gets into in the sprue of sand mould through the molten iron export. The scum slag floating on the surface of the molten iron is effectively blocked by the slag blocking cylinder, so that the scum slag cannot enter a sand mold, and the problem of slag inclusion of castings is solved.
Drawings
Fig. 1 is a perspective view of a runner bowl of the present application.
FIG. 2 is a schematic cross-sectional view of the runner pot of the present application taken along line A-A of FIG. 1.
Fig. 3 is a partially enlarged view of the pouring basin of the present application at the molten iron outlet.
Fig. 4 is a flowchart of a method of manufacturing a runner bowl of the present application.
Detailed Description
Illustrative embodiments are disclosed with reference to the accompanying drawings. However, it is to be understood that the disclosed embodiments are merely exemplary of embodiments that may be embodied in various and alternative forms. The figures are not necessarily to scale and some features may be exaggerated or minimized to show details of particular components. Specific structural and functional details disclosed are not to be interpreted as limiting, but as a representative basis for teaching one skilled in the art how to practice the disclosure.
With reference to fig. 1 and 2, the present application provides a pouring basin 2 for a sand mould 1, comprising: a molten iron accommodating cavity 20 enclosed by the basin wall 10, wherein the top of the molten iron accommodating cavity 20 is provided with a molten iron inlet 21, and the bottom is provided with a molten iron outlet 22; a support frame 30 provided at the top of the molten iron receiving chamber 20; a slag trap 40 suspended from the support frame 30, the slag trap 40 having opposed and through top and bottom ends 41, 42, the bottom end 42 of the slag trap being aligned with the molten iron outlet 22 and spaced from the floor 23 of the molten iron receiving cavity; and a gate plug 50 extendable through the slag trap 40 and the molten iron outlet 22 to the outside of the molten iron receiving chamber 20, the gate plug 50 sealing the sprue inlet 11 of the sand mold 1. The pouring basin 2 of the application is aligned with the molten iron outlet 22 due to the bottom end 42 of the slag bridge 40 and is spaced apart from the bottom surface 23 of the molten iron containing cavity, the water gap plug 50 seals the sprue inlet 11 of the sand mold until the injected molten iron does not reach a certain volume of the molten iron containing cavity 20, when the molten iron reaches the certain volume of the molten iron containing cavity 20, the water gap plug 50 is pulled open, and the molten iron starts to penetrate through the gap between the bottom end 42 of the slag bridge and the bottom surface 23 of the molten iron containing cavity from the bottom of the molten iron and enters the sprue 12 of the sand mold 1 through the molten iron outlet 22. However, dross slag floating on the surface of molten iron is effectively stopped by the slag trap 40 so that it cannot enter the sand mold 1, thereby solving the problem of slag inclusion in the cast. Preferably, the distance from the bottom end 42 of the slag trap to the bottom surface 23 of the molten iron receiving chamber is 10mm to 100mm, which ensures rapid filling of molten iron and effective blocking of dross.
Referring to fig. 2, in one embodiment, the tub wall 10 includes an inner wall 13 and an outer wall 14 covering the inner wall 13, the outer wall 13 being made of sheet metal (preferably steel) and the inner wall 14 being made of refractory cement. Since the outer wall 13 is made of a metal plate member and the inner wall 14 is made of refractory cement, the basin wall 10 is prevented from being made of molding sand, so that no sand washing defect occurs when molten iron is poured into the tundish 1, and the entire tundish is sturdy and durable and can be reused.
With continued reference to fig. 2, in one embodiment, the inner surface of the outer wall 13 is provided with a plurality of spaced apart ribs 15, the ribs 15 extending into the inner wall 14, the ribs 15 acting to prevent the inner wall from falling out of the outer wall. Specifically, the reinforcing rib 15 includes a cross bar 151 and a vertical bar 152 having one end fixed to a middle portion of the cross bar 151, the other end of the vertical bar 152 is fixed to an inner surface of the outer wall 13, and the cross bar 151 is buried in the inner wall 14. That is, the reinforcing ribs 15 are formed in a T shape, and the T-shaped reinforcing ribs 15 can better reinforce the inner wall 14 and prevent the inner wall from falling off. Preferably, the outer wall 13 is welded or cast from sheet steel, and the outer surface of the outer wall 13 is provided with a hanging handle 16 for easy handling of the mobile pouring basin 2.
With continued reference to FIG. 2, in one embodiment, the nozzle block 50 includes a spherical sealing portion 51 and a handle 52 coupled to the spherical sealing portion 51, the handle 52 extending through the bottom end 42 and the top end 41 of the slag trap 40. The handle 52 may be configured as an elongated thin rod and the spherical sealing part 51 may be configured as a heavy and temperature resistant sphere, such as a steel ball, so that the center of gravity of the entire gate plug 50 falls on the spherical sealing part 51 and thus can be stably positioned without tilting when the gate plug 50 seals the sprue inlet 11, using the principle of the tumbler.
Referring to fig. 3, in one embodiment the sprue inlet 11 is configured as a funnel-shaped ceramic tube with a spherical sealing portion 51 abutting against a flared end of the funnel-shaped ceramic tube. The sprue gate inlet 11 is constructed into a funnel-shaped ceramic tube, so that on one hand, stable molten iron filling is facilitated, and no cutoff and no entrainment gas exist; on the other hand, the stable placement of the water gap plug 50 and the sealing of the sprue inlet 11 are facilitated. It is further preferable that the size of the molten iron outlet 22 is larger than the flared end of the funnel-shaped ceramic tube by more than 30mm, so that the molten iron outlet 22 and the sprue inlet 11 form a larger funnel in structure, thereby further facilitating smooth filling of the molten iron.
The application also provides a manufacturing method of the pouring basin, which comprises the following steps:
s10, providing a basin wall 10 enclosing a molten iron accommodating cavity 20, wherein the top of the molten iron accommodating cavity 20 is provided with a molten iron inlet 21, the bottom of the molten iron accommodating cavity 20 is provided with a molten iron outlet 22, and the molten iron outlet 22 is aligned with a sprue gate inlet 11 of a sand mold;
s20, arranging a support frame 30 at a position corresponding to the molten iron outlet 22 at the molten iron inlet 21, hanging a slag-stopping cylinder 40 on the support frame 30, and aligning the bottom end 42 of the slag-stopping cylinder 40 with the molten iron outlet 22 and spacing the bottom surface 23 of the molten iron accommodating chamber;
and S30, arranging a water gap plug 50 through the slag stopping cylinder 40, wherein the water gap plug 50 seals the sprue inlet 11 of the sand mold.
Preferably, step S10 includes providing the outer wall 13, placing the tundish mold inside the outer wall 13, filling a gap between the inner surface of the outer wall 13 and the tundish mold with refractory cement, and removing the tundish mold after tamping, drying the refractory cement to form the inner wall 14, the outer wall 13 and the inner wall 14 together forming the basin wall 10. The specific method comprises the following steps: a pouring basin mold in the shape of the molten iron containing cavity 20 is manufactured in advance, the pouring basin mold is placed in a proper position in the outer wall 13, and the mixed high-temperature-resistant cement is filled in a gap between the outer wall and the pouring basin mold and is vibrated continuously, so that the filling compactness is ensured; after the cement is hardened, separating the basin wall 10 formed by the outer wall 13 and the inner wall 14 from the pouring basin mold; the runner bowl mold is preferably a metal mold or a resin mold.
Preferably, step S10 further includes, after sanding the surface of the inner wall 14 with sand paper, applying a high temperature resistant coating to the surface of the inner wall, and allowing the entire pouring basin 2 to naturally harden for more than two weeks.
Preferably, the step of applying the high temperature resistant coating comprises applying a two-pass penetration coating and applying a one-pass hang-up coating. The application of the high-temperature resistant coating ensures that the shape of the pouring basin can be kept intact under the impact of molten iron, and the pouring basin has no sand washing defect, so that the pouring basin can be reused.
In a particular embodiment, the inventive runner pot has the following manufacturing and use methods:
1) designing a pouring basin mold in advance;
2) modeling: preparing an outer wall 13 made of a steel plate and a mould, placing the outer wall 13 which is designed and manufactured in advance in place, adding the manufactured refractory cement into a gap between the outer wall 13 and a pouring basin mould, continuously tamping in the manufacturing process, taking out the mould after drying to form an inner wall 14, and applying three times of coatings to the inner wall 14, wherein the three times of coatings are respectively a permeable coating for 2 times and a coating-hanging coating for 1 time;
3) when a casting is molded, one or more sections of straight runners 12 are led to the position where the pouring basin 2 is expected to be placed on the sand mold 1, and then a funnel-shaped ceramic pipe is placed (a water gap plug can be placed above the ceramic pipe to prevent molten iron from entering a cavity in advance during pouring);
4) when the box is closed, refractory mortar is placed on the funnel-shaped ceramic tube, and a pouring basin is placed, so that the molten iron outlet 22 is hermetically connected with the sprue 12;
5) when the molten iron is poured to a volume more than 2/3 of the pouring basin, the water outlet plug 50 is pulled out, and the molten iron enters the cavity through the sprue 12 to finish the pouring of the casting.
6) And after the pouring is finished, the pouring basin is separated, and the next product is prepared after the pouring basin is cleaned.
In conclusion, the pouring basin and the manufacturing and using method thereof can realize that one pouring basin can be repeatedly used, effectively block slag and prevent the risk of sand washing of the pouring basin; no risk of sand inclusion and sand washing; low cost, high quality, good slag stopping effect, stable filling, no cutoff, no entrainment and other quality problems, thereby realizing the production of high-quality castings.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. A pouring basin for a sand mold, comprising:
the molten iron accommodating cavity is defined by the basin wall, the top of the molten iron accommodating cavity is provided with a molten iron inlet, and the bottom of the molten iron accommodating cavity is provided with a molten iron outlet;
the supporting frame is arranged at the top of the molten iron accommodating cavity;
a slag-stopping cylinder suspended on the supporting frame, the slag-stopping cylinder having a top end and a bottom end which are opposite and through, the bottom end of the slag-stopping cylinder being aligned with the molten iron outlet and spaced apart from the bottom surface of the molten iron accommodating chamber, and the distance from the bottom end of the slag-stopping cylinder to the bottom surface of the molten iron accommodating chamber being 10mm to 100 mm; and
a gate plug extendable through the slag trap barrel and the molten iron outlet to an exterior of the molten iron receiving cavity, the gate plug sealing a sprue inlet of the sand mold;
wherein the nozzle block comprises a spherical sealing portion and a handle connected to the spherical sealing portion, the handle extending through a bottom end and a top end of the slag trap barrel,
the sprue inlet is constructed as a funnel-shaped ceramic tube, the spherical sealing part is abutted against and attached to the flaring end of the funnel-shaped ceramic tube,
the size of the molten iron outlet is more than 30mm larger than the flaring end of the funnel-shaped ceramic tube.
2. The pouring basin according to claim 1, characterized in that the basin wall comprises an inner wall and an outer wall covering the inner wall, the outer wall being made of sheet metal and the inner wall being made of refractory cement.
3. The runner basin of claim 2, wherein the inner surface of the outer wall is provided with a plurality of spaced ribs extending into the inner wall.
4. The tundish of claim 3, wherein the stiffener comprises a cross-bar and a vertical bar having one end fixed to a middle portion of the cross-bar and the other end fixed to an inner surface of the outer wall, the cross-bar being embedded in the inner wall.
5. A method of manufacturing a runner bowl, comprising the steps of:
s10, providing a basin wall enclosing a molten iron containing cavity, wherein the top of the molten iron containing cavity is provided with a molten iron inlet, the bottom of the molten iron containing cavity is provided with a molten iron outlet, and the molten iron outlet is aligned to a sprue gate inlet of a sand mold;
s20, arranging a support frame at the position of the molten iron inlet corresponding to the molten iron outlet, hanging a slag stopping cylinder on the support frame, aligning the bottom end of the slag stopping cylinder with the molten iron outlet and spacing the bottom end of the slag stopping cylinder from the bottom surface of the molten iron containing cavity, wherein the distance between the bottom end of the slag stopping cylinder and the bottom surface of the molten iron containing cavity is 10 mm-100 mm;
s30, arranging a water gap plug through the slag stopping cylinder, wherein the water gap plug seals a sprue inlet of the sand mold,
wherein the nozzle block comprises a spherical sealing portion and a handle connected to the spherical sealing portion, the handle extending through a bottom end and a top end of the slag trap barrel,
the sprue inlet is constructed as a funnel-shaped ceramic tube, the spherical sealing part is abutted against and attached to the flaring end of the funnel-shaped ceramic tube,
the size of the molten iron outlet is more than 30mm larger than the flaring end of the funnel-shaped ceramic tube.
6. The method of manufacturing of claim 5, wherein step S10 includes providing an outer wall, placing a runner pot mold inside the outer wall, filling a gap between an inner surface of the outer wall and the runner pot mold with refractory cement, and removing the runner pot mold after tamping, drying the refractory cement to form an inner wall, the outer wall and the inner wall together forming the pot wall.
7. The manufacturing method according to claim 6, wherein the step S10 further comprises, after sanding the surface of the inner wall with sand paper, applying a high temperature resistant coating to the surface of the inner wall, and allowing the entire pouring basin to naturally harden for more than two weeks.
8. The method of manufacturing of claim 7, wherein the step of applying a high temperature resistant coating includes applying a two-pass penetration coating and applying a one-pass hang-up coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710954954.XA CN107774913B (en) | 2017-10-13 | 2017-10-13 | Pouring basin for sand mold and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710954954.XA CN107774913B (en) | 2017-10-13 | 2017-10-13 | Pouring basin for sand mold and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN107774913A CN107774913A (en) | 2018-03-09 |
| CN107774913B true CN107774913B (en) | 2020-04-07 |
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| CN201710954954.XA Active CN107774913B (en) | 2017-10-13 | 2017-10-13 | Pouring basin for sand mold and manufacturing method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112024826B (en) * | 2020-08-26 | 2022-07-08 | 共享装备股份有限公司 | Anti-siphon pouring basin and manufacturing method and using method thereof |
| CN113059123A (en) * | 2021-03-25 | 2021-07-02 | 共享装备股份有限公司 | Pouring basin and manufacturing and using method thereof |
| WO2022212219A1 (en) * | 2021-03-29 | 2022-10-06 | Skuld Llc | Process for evaporative casting |
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| JPS5668577A (en) * | 1979-11-09 | 1981-06-09 | Kawasaki Steel Corp | Discharging method of floating slag in ladle |
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