CN212495220U - Pouring system for antigravity casting - Google Patents
Pouring system for antigravity casting Download PDFInfo
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- CN212495220U CN212495220U CN202021482955.2U CN202021482955U CN212495220U CN 212495220 U CN212495220 U CN 212495220U CN 202021482955 U CN202021482955 U CN 202021482955U CN 212495220 U CN212495220 U CN 212495220U
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Abstract
The embodiment of the utility model provides a casting system of antigravity casting is related to, this system includes: a cavity and a pouring system consisting of pouring channels; the mold cavities of various types are connected with the corresponding pouring systems; each pouring system corresponds to different quantities of pouring channels; wherein the cavity comprises: a first cavity or a second cavity; the gating system includes: a first gating system or a second gating system; the first gating system surrounds the first cavity; the second runner system surrounds the second cavity. The utility model discloses a design two kinds of gating systems, solved and caused cold shut, gas pocket, water not enough scheduling problem easily in the diameter sudden change rotary body type aluminum alloy casting process. And castings with different diameters are cast by changing the number and the thickness of each pouring gate in the first pouring system and the second pouring system.
Description
Technical Field
The utility model relates to a pouring system of antigravity casting, in particular to a pouring system of antigravity casting of diameter sudden change solid of revolution type aluminum alloy foundry goods.
Background
The countergravity casting is a method which makes the metal in the crucible overcome gravity and other resistance from bottom to top along the riser tube under the action of pressure to fill the casting mould and obtain the casting under the action of pressure. Its advantages are controllable speed and pressure, stable process, high compression strength, and less defects. The pouring system is a channel which is arranged in the casting mold for introducing liquid metal into a casting mold cavity, is one of main contents of casting process design, and has the functions of guiding the molten metal to stably fill the mold, blocking slag and exhausting gas so as to enable a casting to accord with the sequential solidification principle. The diameter mutation revolving body type aluminum alloy casting has the defects of cold shut, air holes, insufficient pouring and the like due to large radial size change and difficult arrangement of a pouring system, so that the pouring system suitable for antigravity casting is designed, and the problem can be effectively solved by changing the number and the thickness of pouring channels.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a casting gating system of antigravity casting is through designing two kinds of casting gating systems to solve diameter sudden change solid of revolution type aluminum alloy foundry goods because radial dimension is big, difficult design casting gating system, cause cold shut, gas pocket, water not enough problem easily in the pouring process.
In order to achieve the above object, the utility model provides a casting system of antigravity casting, include: a cavity and a pouring system consisting of pouring channels;
the mold cavities of various types are connected with the corresponding pouring systems;
each pouring system corresponds to different quantities of pouring channels;
wherein the cavity comprises: a first cavity or a second cavity;
the gating system includes: a first gating system or a second gating system;
the first gating system surrounds the first cavity;
the second runner system surrounds the second cavity.
Alternatively to this, the first and second parts may,
the first pouring system comprises a first pouring gate opening, a first cross gate, a first straight gate, a first inner pouring gate, a first curved surface straight gate and a first curved surface inner pouring gate;
the first cavity is divided into a first upper cavity and a first lower cavity at the boundary of the cylindrical barrel and the hemispherical barrel of the first cavity;
the first curved surface sprue, the first cross runner and the first runner port are connected in sequence;
one side of the first inner pouring gate is connected with the first straight pouring gate, and the other side of the first inner pouring gate is connected with the side surface of the first lower cavity;
one side of the first curved surface ingate is connected with the first curved surface sprue, and the other side of the first curved surface ingate is connected with the side surface of the first upper cavity.
Alternatively to this, the first and second parts may,
a plurality of first straight pouring channels are uniformly distributed on the periphery of the first cavity in a closed manner;
the height of the first ingate is shorter than that of the first sprue;
the height of the first inner pouring gate is the same as that of the first lower cavity.
Alternatively to this, the first and second parts may,
the number of the first curved surface straight pouring channels is half of that of the first straight pouring channels; the intervals are evenly connected with the first straight pouring channel.
Alternatively to this, the first and second parts may,
the second gating system comprises a second gate opening, a second cross gate, a second straight gate, a second inner gate, a transition gate, a second curved-surface straight gate, a second curved-surface inner gate, a third straight gate and a third inner gate;
the second cavity is divided into a second upper cavity and a second lower cavity at the boundary of the cylindrical barrel and the hemispherical barrel of the second cavity;
the bottom of the second cross pouring channel is connected with the top of the second pouring channel opening;
the bottom of the second straight pouring channel and the bottom of the transition pouring channel are connected with the top of the second horizontal pouring channel;
one side of the second inner sprue is connected with the second sprue, and the other side of the second inner sprue is connected with the side surface of the second upper cavity;
the transition pouring channel, the second curved surface straight pouring channel and the third straight pouring channel are sequentially connected;
one side of the second curved surface ingate is connected with the second curved surface sprue, and the other side of the second curved surface ingate is connected with the side surface of the second lower cavity;
one side of the third ingate is connected with the third sprue, and the other side of the third ingate is connected with the side surface of the second upper cavity.
Alternatively to this, the first and second parts may,
a plurality of second straight pouring channels are arranged, and the number of the transition pouring channels is the same as that of the second straight pouring channels;
the second straight pouring gate and the transition pouring gate are uniformly arranged at a closed interval;
the height of the second in-gate is the same as the height of the second sprue.
Alternatively to this, the first and second parts may,
the third sprue is shorter in height than the second sprue.
The technical scheme has the following beneficial effects: the utility model discloses a design two kinds of gating systems, caused cold shut, gas pocket easily in having solved the aluminum alloy casting process, watered not enough scheduling problem. And castings with different diameters are cast by changing the number and the thickness of each pouring gate in the first pouring system and the second pouring system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only 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 pouring system for antigravity casting according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first gating system provided in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a second embodiment of a countergravity casting gating system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a second gating system according to an embodiment of the present invention.
Description of the symbols:
the casting mold comprises a first pouring system-1, a first cavity-2, a second pouring system-3, a second cavity-4, a first gate opening-11, a first cross runner-12, a first straight runner-13, a first curved surface straight runner-14, a first inner gate-15, a first curved surface inner gate-16, a first upper cavity-21, a first lower cavity-22, a second gate opening-31, a second cross runner-32, a second straight runner-33, a transition runner-34, a second curved surface straight runner-35, a third straight runner-36, a second inner gate-37, a second curved surface inner gate-38, a third inner gate-39, a second upper cavity-41 and a second lower cavity-42.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.
The revolving body type aluminum alloy shell with the diameter mutation blind hole structure has the advantages that due to the fact that the radial size of the revolving body type aluminum alloy shell is large in change, a pouring system is difficult to arrange, the defects of cold shut, air holes, insufficient pouring and the like are easily caused, and therefore the pouring system suitable for antigravity casting is designed, and castings with different diameters are cast by changing the number and the thickness of pouring channels in the first pouring system and the second pouring system. The problem that the radial size of the diameter mutation rotary casting is large in change is effectively solved.
The technical solution of the present invention is explained by the following specific embodiments with reference to the accompanying drawings:
a gating system for countergravity casting, the system comprising: a cavity and a pouring system consisting of pouring channels;
the mold cavities of various types are connected with the corresponding pouring systems;
each pouring system corresponds to different quantities of pouring channels;
wherein the cavity comprises: a first cavity or a second cavity;
the gating system includes: a first gating system or a second gating system;
the first gating system surrounds the first cavity;
the second runner system surrounds the second cavity.
Fig. 1 is a schematic structural diagram of a pouring system for antigravity casting according to an embodiment of the present invention, as shown, including: a first cavity 2 and a first gating system 1 consisting of pouring channels;
the first runner system 1 surrounds the first cavity 2.
Fig. 3 is a schematic structural diagram of a second embodiment of a gating system for antigravity casting according to an embodiment of the present invention, as shown, including: a second cavity 4 and a second gating system 3 consisting of runners;
the second gating system 3 surrounds the second cavity 4.
In order to cast aluminum alloy shells with different diameters, a pouring system suitable for antigravity casting is designed, molding sand is used for forming cavities of various types of castings aiming at different aluminum alloy shells to be manufactured, then the pouring system corresponding to the cavities of various types is cast by using the molding sand, two pouring systems are designed aiming at the castings with the diameters of 400-550mm, and a first pouring system 1 surrounds a first cavity 2; the first cavity 2 has an upward small opening, the second gating system 3 surrounds the second cavity 4, and the second cavity 4 has a downward small opening. In this embodiment, castings with different diameters can be cast by changing the number and thickness of the runners in the first gating system 1 and the second gating system 3. The problem that the radial size of the diameter mutation rotary casting is large in change is effectively solved.
Fig. 2 is a schematic structural diagram of a first gating system provided in an embodiment of the present invention, as shown in the drawing: alternatively to this, the first and second parts may,
the first gating system 1 comprises a first gate 11, a first cross gate 12, a first straight gate 13, a first inner gate 15, a first curved-surface straight gate 14 and a first curved-surface inner gate 16;
the first cavity 2 is divided into a first upper cavity 21 and a first lower cavity 22 at the boundary of the cylindrical barrel and the hemispherical barrel of the first cavity 2;
the first curved surface straight pouring gate 14, the first straight pouring gate 13, the first cross pouring gate 12 and the first pouring gate 11 are connected in sequence;
one side of the first ingate 15 is connected with the first sprue 13, and the other side of the first ingate 15 is connected with the side surface of the first lower cavity 22;
one side of the first curved surface ingate 16 is connected with the first curved surface sprue 14, and the other side of the first curved surface ingate 16 is connected with the side surface of the first upper cavity 21.
Due to the design of antigravity casting, aluminum liquid stably enters the first cavity 2 from bottom to top along the first inner pouring gate 15 arranged on the first pouring system 1, a small opening of a cast aluminum alloy casting is placed upwards, the first pouring gate 11 in the first pouring system 1 is designed to guide the aluminum liquid to enter the first cross gate 12, the first cross gate 12 is a channel connecting the first straight gate 13 and the first pouring gate 11, the aluminum liquid is introduced into the first straight gate 13 from the first cross gate 12, the heat balance of the first cavity 2 can be improved by the aluminum liquid in the first cross gate 12, the aluminum liquid in the first cross gate 12 is in a full state, and the flowing speed of the aluminum liquid is lower than the suspension speed of magazines, the first cross gate 12 can play a role in blocking slag and exhausting.
One side of the first inner pouring gate 15 is connected with the first straight pouring gate 13, and the first straight pouring gate 13 gradually shrinks towards the first inner pouring gate 15 so as to ensure that molten aluminum is continuously kept full of a pouring system and reduce vortex entrainment to the maximum extent.
In the embodiment, the aluminum alloy shells with different diameters can be cast by changing the number and the thickness of each pouring channel.
Alternatively to this, the first and second parts may,
a plurality of first straight runners 13 are uniformly distributed on the periphery of the first cavity 2 in a closed manner;
the height of the first in-gate 15 is shorter than the height of the first sprue 13;
the first in-gate 15 has the same height as the first lower cavity 22.
The runner is a channel through which aluminum liquid needs to pass when entering the first cavity 2, so that the flow speed and the filling time of the aluminum liquid can be influenced by the thickness of the runner, the diameter range of the aluminum alloy cast by the method is 400-550mm, the number of the designed first runners is 6, the first runners are uniformly distributed on the periphery of the first cavity 2 in a sealing manner, if the diameter of the aluminum alloy to be cast is larger, the diameter of the first cavity is larger, the number of the designed first runners is more, and the number of the designed first runners is thicker, so that the filling stability is ensured, the filling stability can impact the casting mold less, the coiling and slag inclusion can be effectively controlled, the alloy oxidation is prevented, and the defect of aluminum alloy pores is effectively overcome. Conversely, if the diameter of the aluminum alloy to be cast is smaller, the number of the first runners 13 is less, and the first runners 13 are thinner;
the first curved surface sprue 14, the first sprue 13 and the first runner 12 are connected in sequence, the first ingate 15 and the corresponding first sprue 13 are integrated, and the first curved surface ingate 16 and the corresponding first curved surface sprue 14 are integrated, so that the positioning and the operation are convenient; the height of the first inner gate 15 is designed to be the same as that of the first lower cavity 22, the shape curve of the side, connected with the first lower cavity 22, of the first inner gate 15 is consistent with that of the first lower cavity 22, the shape curve of the side, connected with the first upper cavity 21, of the first curved-surface inner gate 16 is consistent with that of the first upper cavity 21, and the pouring gate is guaranteed to be installed in place during molding.
Alternatively to this, the first and second parts may,
the number of the first curved surface straight pouring channels 14 is half of that of the first straight pouring channels 13; the first gates 13 are connected at regular intervals.
First curved surface sprue 14, first sprue 13, first runner 12 are connected in order, first sprue 13 is connected to first ingate 15 one side, first curved surface sprue 14 is connected to first curved surface ingate 16 one side, wherein, the quantity of first curved surface sprue 14 is compared in the quantity reduction of first sprue 13, and the quantity of first curved surface ingate 16 is compared in the reduction of first ingate 15 quantity, the small-end runner arrangement difficulty has been reduced, leave the space for placing of crust chill, improve casting quality.
Fig. 4 is a schematic structural diagram of a second gating system provided in an embodiment of the present invention, as shown in the drawing:
alternatively to this, the first and second parts may,
the second gating system 3 comprises a second gate 31, a second cross gate 32, a second straight gate 33, a second inner gate 37, a transition gate 34, a second curved straight gate 35, a second curved inner gate 38, a third straight gate 36 and a third inner gate 39;
the second cavity 4 is divided into a second upper cavity 41 and a second lower cavity 42 at the boundary of the cylindrical barrel and the hemispherical barrel of the second cavity 4;
the bottom of the second runner 32 is connected with the top of the second runner opening 31;
the bottom of the second straight pouring channel 33 and the bottom of the transition pouring channel 34 are connected with the top of the second cross pouring channel 32;
one side of the second ingate 37 is connected with the second sprue 33, and the other side of the second ingate 37 is connected with the side surface of the second upper cavity 41;
the transition pouring channel 34, the second curved surface straight pouring channel 35 and the third straight pouring channel 36 are connected in sequence;
one side of the second curved surface ingate 38 is connected with the second curved surface sprue 35, and the other side of the second curved surface ingate 38 is connected with the side surface of the second lower cavity 42;
one side of the third ingate 39 is connected to the third sprue 36, and the other side of the third ingate 39 is connected to a side surface of the second upper cavity 41.
The aluminum alloy casting mold is characterized in that small openings of aluminum alloy castings are placed downwards, namely small openings of a second cavity 2 are placed downwards, a second sprue channel port 31 in a second gating system 3 of the aluminum alloy casting mold guides aluminum liquid to enter a second cross gate 32, the second sprue channel 33 and a transition runner 34 are connected with the second sprue channel port 31 through the second cross gate 32, the aluminum liquid is introduced into the second sprue channel 33 and the transition runner 34 from the second cross gate 32, the heat balance of the second cavity 4 can be improved through the aluminum liquid in the second cross gate 32, the aluminum liquid in the second cross gate 32 is in a full state, the flowing speed of the aluminum liquid is lower than the suspension speed of magazines, the second cross gate 32 can play a role in blocking slag and exhausting.
The second sprue 33 is connected with the second upper cavity 41 through a second inner gate 37, the transition runner 34 guides aluminum liquid into the second curved surface sprue 35, the second curved surface sprue 35 and a corresponding second curved surface inner gate 38 are integrated, the aluminum liquid enters the second cavity 4 through the second curved surface inner gate 38, meanwhile, the aluminum liquid in the second curved surface sprue 35 flows into a third sprue 36 again, the third sprue 36 and a corresponding third inner gate 39 are integrated, and the aluminum liquid enters the second cavity 4 through the third inner gate 39.
In the pouring system, the sprue is gradually contracted from the sprue to the ingate so as to ensure that the pouring system is continuously filled with aluminum liquid and reduce vortex entrainment to the maximum extent.
The inner sprue and the corresponding sprue are integrated, so that the positioning and the operation are convenient; the shape curve of the side, connected with the second cavity 4, of the inner sprue is consistent with the curve of the second cavity 4, and the pouring gate is guaranteed to be installed in place during molding.
In the embodiment, aluminum alloy shells with different diameters can be cast by changing the number and the thickness of each pouring channel.
Alternatively to this, the first and second parts may,
a plurality of second straight runners 33 are arranged, and the number of the transition runners 34 is the same as that of the second straight runners 33;
the second straight pouring channel 33 and the transition pouring channel 34 are arranged at a closed interval uniformly;
the height of the second in-gate 37 is the same as the height of the second sprue 33.
The bottom of the second straight pouring channel 33 and the bottom of the transition pouring channel 34 are connected with the top of the second cross pouring channel 32; the transition pouring channel 34, the second curved surface straight pouring channel 35 and the third straight pouring channel 36 are connected in sequence; the second straight pouring gate 33 and the third straight pouring gate 36 are connected with a second upper cavity through an inner sprue, and the second curved-surface straight pouring gate 35 is connected with a second lower cavity through a second curved-surface inner sprue 38; the transition pouring gate 34 is arranged to be the same as the second curved-surface straight pouring gate 35, the second straight pouring gate 33 and the third straight pouring gate 36 in number, because the diameter of the second lower cavity 42 is smaller than that of the second upper cavity 41, the total stable mold filling is ensured, the number of pouring gates connected with the second upper cavity 41 is more than that of the second lower cavity 42, the number of the second curved-surface inner gates 38 is reduced compared with the total number of the second inner gates 37 and the third inner gates 39, and the arrangement difficulty of the small-end pouring gates is reduced.
Alternatively to this, the first and second parts may,
the height of the third sprue 36 is shorter than the height of the second sprue 33.
Because the third sprue 36 and the second curved sprue 35 are connected in sequence with the transition sprue 34 and the second runner 32, the second sprue 33 is directly connected with the second runner 32, and the height of the second sprue 33 is higher than that of the third sprue 36, so that the quantity of the runners connected with the second upper cavity 41 is more than that of the second lower cavity 42.
After a pouring system is designed, the sand mold is baked at high temperature, sand becomes crisp after being baked at high temperature, and the aluminum alloy shell required by people is obtained after the sand is cleaned by soaking water.
The aluminum alloy has small density, difficult mold filling, active chemical property and easy oxidation and air suction, and the density of metal oxide is similar to that of aluminum liquid and is difficult to remove when mixed into liquid, so that the cast aluminum alloy pouring system has the characteristics of quick mold filling, strong slag blocking capability, stable liquid, no vortex, splashing, granule and the like. And because the aluminum alloy solidified body has large shrinkage and is easy to form shrinkage cavities, shrinkage porosity, deformation and even cracks, sequential solidification is considered when the pouring system is arranged, and the factors such as feeding and the like are convenient. The casting in the embodiment is a revolving aluminum alloy casting, the height of the casting is 700mm, the wall thickness of the casting is 5mm, the casting is required to be capable of bearing 2t of pulling force in the axial direction, the diameter of the large end of the casting is 500mm, the diameter of the small end of the casting is 200mm, the appearance of the small end is spherical, the diameter of the large end and the small end is sharply reduced, and if a pouring system is unreasonable in design, casting defects are easily generated, and the use requirements cannot be.
The countergravity casting is a method which makes the metal in the crucible overcome gravity and other resistance from bottom to top along the riser tube under the action of pressure to fill the casting mould and obtain the casting under the action of pressure. Its advantages are controllable speed and pressure, stable process, high compression strength, and less defects. The pouring system is a channel which is arranged in the casting mold for introducing liquid metal into a casting mold cavity, is one of main contents of casting process design, and has the functions of guiding the molten metal to stably fill the mold, blocking slag and exhausting gas so as to enable a casting to accord with the sequential solidification principle.
Therefore, when a pouring system for antigravity casting is designed, on the premise of ensuring stable filling of molten aluminum, filling is fast, and slag discharge, exhaust and sequential solidification are facilitated. For the revolving body type aluminum alloy shell with the diameter mutation blind hole structure, a side surface gap type pouring system is adopted, so that the aluminum liquid can stably rise in a gap, the feeding in the vertical direction is fully exerted, and the feeding capability in the horizontal direction is not influenced.
The technical scheme has the following beneficial effects: the utility model discloses a design two kinds of gating systems, solved and caused cold shut, gas pocket, water not enough scheduling problem easily in the diameter sudden change rotary body type aluminum alloy casting process. And castings with different diameters are cast by changing the number and the thickness of each pouring gate in the first pouring system and the second pouring system.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
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| CN111957897A (en) * | 2020-07-24 | 2020-11-20 | 山西汾西重工有限责任公司 | Pouring system for antigravity casting |
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| CN111957897A (en) * | 2020-07-24 | 2020-11-20 | 山西汾西重工有限责任公司 | Pouring system for antigravity casting |
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Address after: 030027 Heping North Road, Shanxi, Taiyuan, No. 131 Patentee after: China State Shipbuilding Corporation Fenxi Heavy Industry Co.,Ltd. Country or region after: China Address before: 030027 Heping North Road, Shanxi, Taiyuan, No. 131 Patentee before: SHANXI FENXI HEAVY INDUSTRY Co.,Ltd. Country or region before: China |