CN216912021U

CN216912021U - Casting pouring system

Info

Publication number: CN216912021U
Application number: CN202220161521.5U
Authority: CN
Inventors: 陈善君; 隋大山
Original assignee: WUJIANG HUAMAO MACHINERY MANUFACTURING CO LTD; Langxi Huamao Machinery Manufacturing Co ltd; Shanghai Jiaotong University
Current assignee: WUJIANG HUAMAO MACHINERY MANUFACTURING CO LTD; Langxi Huamao Machinery Manufacturing Co ltd; Shanghai Jiaotong University
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2022-07-08
Anticipated expiration: 2032-01-20

Abstract

The application relates to the technical field of casting, in particular to a casting pouring system. The casting gating system comprises: the sprue is arranged along the vertical direction; each flow distribution assembly is arranged along the horizontal direction and comprises a first cross gate, a second cross gate, a third cross gate, a riser and an ingate which are sequentially communicated; the ingate is used for being communicated with the casting cavity; the first horizontal pouring channel of each flow distribution assembly is communicated with the bottom of the straight pouring channel; the third cross gate, the first cross gate and the second cross gate are arranged in a mode that the sectional area of an inner cavity is gradually increased, and the sectional area of the inner cavity of the inner gate is larger than that of the inner cavity of the third cross gate. According to the casting pouring system, the casting pouring systems arranged at the upstream and the downstream of the dead head respectively have the characteristics of semi-closed and open pouring systems with the inner cavity sectional areas increased firstly and then reduced and then increased, the stability of mold filling can be improved, the slag stopping effect is achieved, and the casting percent of pass is favorably improved.

Description

Casting pouring system

Technical Field

The application relates to the technical field of casting, in particular to a casting pouring system.

Background

The existing casting pouring system is generally provided with a filter assembly such as a filter screen and the like to filter scum or impurities in pouring fluid (such as molten metal), so that the mold filling speed is obviously reduced, and the phenomenon that a casting cavity cannot be effectively poured due to the blockage of the filter assembly is easy to occur; meanwhile, the existing casting pouring system is not stable enough in mold filling, and is not beneficial to ensuring the mold filling effect of pouring fluid on a casting cavity.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a casting gating system, which aims to improve the technical problem that the filling effect of the existing casting gating system is not good.

In order to achieve the purpose, the following technical means are adopted in the application:

the application provides a casting gating system, which comprises a sprue and at least two shunting assemblies.

The sprue is arranged in the vertical direction.

Each flow distribution assembly is arranged along the horizontal direction and comprises a first cross gate, a second cross gate, a third cross gate, a riser and an ingate which are sequentially communicated; the ingate is used for being communicated with the casting cavity; the first runner of each flow distribution assembly is in communication with the bottom of the sprue.

The third cross pouring gate, the first cross pouring gate and the second cross pouring gate are arranged in a mode that the sectional area of inner cavities of the third cross pouring gate, the first cross pouring gate and the second cross pouring gate is gradually increased, and the sectional area of the inner cavity of the inner pouring gate is larger than that of the inner cavity of the third cross pouring gate.

According to the casting mold, the flow distribution assembly is communicated with the sprue and comprises a first runner, a second runner, a third runner, a riser and an ingate which are sequentially communicated, and the third runner, the first runner and the second runner are arranged in a mode that the sectional areas of inner cavities of the third runner, the second runner and the third runner are increased one by one, so that the sectional area of the inner cavity of the casting mold system positioned at the upstream of the riser has the characteristics of a semi-closed casting system which is increased firstly and then reduced, the stability of mold filling can be ensured, a good slag blocking effect is achieved, scum and impurities in casting fluid are effectively blocked to the casting mold system, the possibility that the scum and the impurities enter a casting cavity is reduced, and filter assemblies such as a filter screen and the like are not required to be arranged; meanwhile, the sectional area of the inner cavity of the inner pouring channel is larger than that of the inner cavity of the third cross pouring channel, so that a casting pouring system located at the downstream of the riser presents the characteristic of an open pouring system, the filling speed of pouring fluid entering a casting cavity can be properly reduced, the filling is stable, the defects of sand inclusion or air entrainment and the like of the casting are reduced, and the qualified rate of the casting is improved. In addition, the number of the shunting assemblies is at least two, and the first cross gate of each shunting assembly is connected with the bottom of the sprue, so that the whole casting pouring system can pour a plurality of casting cavities simultaneously, and the production efficiency of castings is improved.

In some embodiments of the present application, the first runner, the second runner, the third runner, and the ingate have a ratio of lumen cross-sectional area of (1.2-1.7): (1.9-2.5): (0.65-0.95): (2-3).

The cross sections of the inner cavities of the first cross pouring gate, the second cross pouring gate, the third cross pouring gate and the inner pouring gate are in the proportion, so that a casting pouring system positioned at the upstream of the riser has a good slag blocking effect, and the possibility that scum or impurities in pouring fluid enter a casting cavity is reduced; meanwhile, the mold filling speed of the casting pouring fluid at the downstream of the riser into the casting cavity can be reduced, the mold filling stability is ensured, the defects of sand inclusion or air entrainment and the like generated by the casting are reduced, and the qualified rate of the casting is improved.

In some embodiments of the present application, the first runner, the second runner, the third runner, and the ingate have a ratio of lumen cross-sectional area of 1.5: 2: 0.85: 2.5.

the cross sections of the inner cavities of the first cross pouring channel, the second cross pouring channel, the third cross pouring channel and the inner pouring channel are in the proportion, so that the slag blocking and mold filling effects can be further improved.

In some embodiments of the present application, the cavity level of the second runner is higher than the cavity level of the first runner.

The arrangement mode enables a step type connection mode to be formed between the inner cavity of the first cross gate and the inner cavity of the second cross gate, most of scum or impurities in pouring fluid can be intercepted into the inner cavity of the first cross gate, the possibility that the scum or impurities in the pouring fluid enter the casting cavity is further reduced, and the casting yield is improved.

In some embodiments of the present application, the wall thickness of the ingate is 35-60 mm.

The ingate is arranged at the downstream of the riser and is used for being communicated with the casting cavity, and the wall thickness of the ingate is 35-60mm, so that the pouring fluid in the ingate can be solidified before the pouring fluid in the casting cavity, the casting cavity is separated from the riser, the pouring fluid in the casting pouring system and the pouring fluid in the casting cavity are in a non-communicated state, the phenomenon that the pouring fluid in the casting cavity is subjected to volume expansion in the solidification process to enable the pouring fluid in the casting cavity to back flow into the casting pouring system is avoided, the extrusion force generated by the volume expansion phenomenon in the casting cavity in the solidification process of the pouring fluid in the casting cavity can act on the casting body, the feeding effect of the casting is enhanced, the defects of shrinkage cavity, shrinkage porosity and the like are effectively reduced, and the density of the casting is improved.

In some embodiments of the present application, the first runner is provided with a buffer zone and two non-buffer zones communicating with each other; the two non-buffer areas are respectively positioned at the upstream and the downstream of the buffer area, and the sectional area of the inner cavity of the buffer area is larger than that of the non-buffer area.

By the arrangement mode, the pouring fluid with certain gravitational potential energy in the sprue flows into the buffer area in the second cross runner, and then the gravitational potential energy is gently converted into kinetic energy, so that the buffering effect is achieved, and the stability of mold filling is improved.

In some embodiments of the present application, the flow splitting assembly further comprises an uptake chamber downstream of and in communication with the third runner, and fluid flowing through the third runner has a tendency to preferentially flow toward the uptake chamber.

Because part of scum or impurities in the casting fluid can be concentrated at the front end of the flow direction of the casting fluid; the fluid flowing through the third cross pouring channel has the tendency of preferentially flowing to the receiving chamber, so that scum or impurities at the front end in the flowing direction of the pouring fluid can enter the receiving chamber and be intercepted by the receiving chamber, the possibility that the scum or the impurities enter the casting cavity after entering the riser is effectively reduced, and the casting yield is favorably improved.

In some embodiments of the present application, the third runner is provided with a first through hole, a second through hole and a third through hole, the orientation of the first through hole is parallel to the orientation of the second through hole, and the orientation of the third through hole forms an included angle with the orientation of the first through hole.

The first through hole is communicated with the second cross gate, the second through hole is communicated with the bearing chamber, and the third through hole is communicated with the riser.

According to the arrangement mode, the flow direction of the pouring fluid entering the third cross runner through the first through hole is the same as that of the pouring fluid entering the receiving chamber through the second through hole, and the flow direction of the pouring fluid entering the third cross runner through the first through hole is different from that of the pouring fluid entering the riser through the second through hole, so that the fluid flowing through the third cross runner has a tendency of preferentially flowing to the receiving chamber.

In some embodiments of the present application, the height of the sprue is 300-500 mm.

The height of the sprue is 300-500mm, so that the pouring fluid has enough static pressure head when entering the flow distribution assembly, and the mold filling speed is favorably ensured so that the pouring fluid can smoothly flow into the casting cavity.

In some embodiments of the present application, the at least two flow splitting assemblies are distributed about a peripheral array of the sprue.

The arrangement mode is beneficial to ensuring that the whole casting pouring system can pour a plurality of casting cavities at the same time, and the production efficiency of the castings is improved; and the consumption of materials such as molding sand and the like is reduced, and the production cost is saved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 shows a schematic structural diagram of a first view of a casting gating system provided by an embodiment of the application.

Fig. 2 is a schematic structural diagram illustrating a second perspective of a casting gating system provided by an embodiment of the present application.

Fig. 3 shows a casting pouring system and a structural schematic diagram of a casting provided by the embodiment of the application.

Fig. 4 shows an enlarged view at a in fig. 2.

An icon: 100-casting gating system; 110-sprue; 120-a flow splitting assembly; 121-first runner; 1211-non-buffer region; 1212-a buffer; 122-second runner; 123-third runner; 124-riser; 125-ingate; 126-receiving chamber; 200-casting.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when products of the application are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of description and simplification of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the application.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Examples

Fig. 1 shows a schematic structural diagram of a first perspective view of a casting gating system 100 provided in an embodiment of the present application, fig. 2 shows a schematic structural diagram of a second perspective view of the casting gating system 100 provided in an embodiment of the present application, and fig. 3 shows a schematic structural diagram of the casting gating system 100 and a casting 200 provided in an embodiment of the present application, please refer to fig. 1, fig. 2, and fig. 3, the present application provides a casting gating system 100 that can be used for fluid pouring in a casting cavity to manufacture a casting 200, and the present application does not limit a specific pouring fluid used in the casting gating system 100, for example, the pouring fluid may be molten metal such as molten iron containing carbon.

The casting gating system 100 includes a sprue 110 and a flow divider assembly 120. The sprue 110 is disposed in a vertical orientation and the flow distribution assembly 120 is disposed in a horizontal orientation. The flow distribution assembly 120 includes a first runner 121, a second runner 122, a third runner 123, risers 124 and an ingate 125 in serial communication. The first runner 121 of the flow distribution assembly 120 communicates with the bottom of the sprue 110. The ingate 125 is adapted to communicate with a casting cavity (not shown). During pouring, a pouring fluid enters the flow distribution assembly 120 through the sprue 110, sequentially flows through the first runner 121, the second runner 122, the third runner 123, the riser 124 and the ingate 125, and then enters the casting cavity, and is solidified to form the casting 200.

In the present embodiment, the casting 200 is a disc-type iron casting. It should be noted that the present application does not limit the specific shape and structure of the casting 200.

The number of reposition of redundant personnel subassembly 120 is at least two, and every reposition of redundant personnel subassembly 120 all sets up along the horizontal direction, and the first cross gate 121 of every reposition of redundant personnel subassembly 120 all communicates with the bottom of sprue 110 for in pouring fluid gets into every reposition of redundant personnel subassembly 120 through sprue 110, and then realize that whole foundry goods gating system 100 pours a plurality of foundry goods die cavities simultaneously, improve the production efficiency of foundry goods 200. In the present embodiment, the number of the shunt assemblies 120 is 5. It should be noted that in other embodiments of the present application, the number of the diversion assemblies 120 may also be 2, 3, or more, and the number of the diversion assemblies 120 may be adjusted according to the actual production requirement and the volume of the casting cavity.

Further, in this embodiment, the at least two shunting assemblies 120 are distributed around the periphery of the sprue 110 in an array manner, which is beneficial to ensuring that the whole casting gating system 100 simultaneously gates a plurality of casting cavities, and is beneficial to improving the production efficiency of the casting 200; and the consumption of materials such as molding sand and the like is reduced, and the production cost is saved.

In the present embodiment, the first runner 121, the second runner 122, the third runner 123, and the ingate 125 are substantially elongated in shape; the sprue 110 and risers 124 are generally cylindrical in shape. The shape of the sprue 110, the first runner 121, the second runner 122, the third runner 123, the riser 124, and the ingate 125 are not limited in this application.

In this embodiment, the height of the sprue 110 is 300-500mm, so that the pouring fluid has sufficient static head when entering the flow distribution assembly 120, which is beneficial to ensure the mold filling speed so that the pouring fluid can smoothly flow into the casting cavity. Illustratively, the height of the sprue 110 may be 300mm, 320mm, 350mm, 400mm, 450mm, or 500mm, among others. Further, in the present embodiment, the height of the sprue 110 is 320 mm.

Since the pouring fluid in the sprue 110 has a certain gravitational potential energy, the pouring fluid has a high flow rate in order to prevent the pouring fluid having a certain gravitational potential energy from flowing into the first runner 121. In this embodiment, the first runner 121 is provided with two non-buffer areas 1211 and two buffer areas 1212, which are communicated with each other, the number of the non-buffer areas 1211 is two and the non-buffer areas 1211 and the buffer areas 1212 are respectively located at the upstream and the downstream of the buffer area 1212, and the cross-sectional area of the inner cavity of the buffer area 1212 is greater than the cross-sectional area of the inner cavity of the non-buffer area 1211 (not shown in the figure), so that the gravitational potential energy is gently converted into the kinetic energy after the casting fluid with a certain gravitational potential energy in the sprue 110 flows into the buffer area in the second runner 122, which plays a role in buffering, and is beneficial to improving the stability of mold filling.

It should be noted that in other embodiments of the present application, the non-buffer 1211 and the buffer 1212 of the sprue 110 may not be provided.

In order to further improve the slag stopping effect of the whole casting pouring system 100, in this embodiment, the horizontal height of the inner cavity of the second runner 122 is higher than the horizontal height of the inner cavity of the first runner 121, that is, along the flowing direction of the pouring fluid, a rising step-like structure is formed between the inner cavity of the first runner 121 and the inner cavity of the second runner 122, so that the possibility that scum or impurities in the pouring fluid enters the casting cavity is effectively reduced, and the yield of the casting 200 is improved.

In the present embodiment, the inner runner 125 has a wall thickness of 35-60mm, and the inner runner 125 may have a thickness of 35mm, 40mm, 45mm, 50mm, 60mm, or the like, for example.

Because the ingate 125 is arranged at the downstream of the riser 124 and is used for communicating with the casting cavity, and the wall thickness of the ingate 125 is set to 35-60mm, the wall thickness of the ingate 125 is relatively thin, so that when the pouring fluid is solidified, the pouring fluid in the ingate 125 is solidified before the pouring fluid in the casting cavity, thereby isolating the casting cavity from the riser 124, that is, the pouring fluid in the casting pouring system 100 and the pouring fluid in the casting cavity are in a non-communicated state, avoiding that the pouring fluid in the casting cavity is subjected to volume expansion in the solidification process to reflux the pouring fluid in the casting cavity into the casting pouring system 100, thereby ensuring that the volume expansion phenomenon (for example, the graphitization volume expansion phenomenon of carbon-containing molten iron in the solidification process) generated in the casting cavity can act on the casting 200 body, so as to enhance the feeding effect of the casting 200, effectively reduce the defects of shrinkage cavity, shrinkage porosity and the like, and be beneficial to improving the density of the casting 200.

In this embodiment, the cross-sectional area of each portion of the inner cavity of the sprue 110 is the same along the flow direction of the casting fluid; similarly, along the flowing direction of the pouring fluid, the cross-sectional area of each part of the inner cavity of the second runner 122 is the same, the cross-sectional area of each part of the inner cavity of the third runner 123 is the same, and the cross-sectional area of each part of the inner cavity of the inner runner 125 is the same; since the first runner 121 includes the non-buffer 1211 and the buffer 1212, the cross-sectional area of each portion of the cavity of the non-buffer 1211 is the same and the cross-sectional area of each portion of the cavity of the buffer 1212 is the same in the flowing direction of the casting fluid.

In other embodiments of the present invention, the cross-sectional areas of the portions of the sprue 110, the portions of the first runner 121, the portions of the second runner 122, the portions of the third runner 123, and the portions of the cavity of the ingate 125 may be different from each other along the flowing direction of the casting fluid.

In the present embodiment, the third runner 123, the first runner 121 and the second runner 122 in each flow dividing assembly 120 are arranged in a manner that the cross-sectional area of the inner cavity is gradually increased (not shown in the figure); in other words, the sectional area of the inner cavity of the third runner 123 is smaller than the sectional area of the inner cavity of the first runner 121 and smaller than the sectional area of the inner cavity of the second runner 122, so that the sectional area of the inner cavity of the casting gating system 100 located upstream of the riser 124 presents the characteristic of a semi-closed gating system which is increased and then decreased, thereby not only ensuring the stability of mold filling, but also having good slag blocking effect, effectively blocking scum and impurities in the pouring fluid to the casting gating system 100, and reducing the possibility that the scum and the impurities enter the casting cavity; compare current foundry goods gating system, need not to set up filter assembly such as filter screen, avoid appearing filter assembly block and the obvious exemption phenomenon of the mould flow rate of filling that leads to and filter assembly blocks up and the phenomenon that can't effectively carry out the pouring to the foundry goods die cavity that leads to.

In this embodiment, the sectional area of the inner cavity of the ingate 125 in each flow dividing assembly 120 is greater than the sectional area of the inner cavity of the third runner 123, so that the casting gating system 100 located downstream of the riser 124 has the characteristic of an open gating system, the flow rate of the casting fluid flowing into the casting cavity from the ingate 125 can be properly reduced, the mold filling is more stable, the defects of sand inclusion or air entrainment and the like caused by the excessively high flow rate of the casting fluid are effectively reduced, and the yield of the casting 200 is improved.

In this embodiment, since the cross-sectional areas of the inner cavities of the second runner 122 and the third runner 123 are the same, the cross-sectional areas of the inner cavities of the ingate 125 and the non-buffer 1211 are the same, and the cross-sectional areas of the inner cavities of the buffer 1212 and the third runner are the same, respectively, along the flowing direction of the casting fluid; the sectional area of the inner cavity of the third runner 123 is less than the sectional area of the inner cavity of the first runner 121 is less than the sectional area of the inner cavity of the second runner 122, which means that: the cross-sectional area of the inner cavity of the third runner 123 < the cross-sectional area of the inner cavity of the non-buffer 1211 in the first runner 121 < the cross-sectional area of the buffer 1212 in the first runner 121 < the cross-sectional area of the inner cavity of the second runner 122.

In other embodiments of the present application, since the cross-sectional areas of the first runner 121, the second runner 122, the third runner 123 and the inner cavity of the ingate 125 may be different from each other along the flowing direction of the casting fluid, the cross-sectional area of the third runner 123 may be different from each other, and the cross-sectional area of the inner cavity of the third runner 123 < the cross-sectional area of the inner cavity of the first runner 121 < the cross-sectional area of the inner cavity of the second runner 122 means: the maximum inner cavity sectional area of the third runner 123 is less than the minimum inner cavity sectional area of the non-buffer area 1211 in the first runner 121, the maximum inner cavity sectional area of the non-buffer area 1211 in the first runner 121 is less than the minimum inner cavity sectional area of the buffer area 1212 in the first runner 121, and the maximum inner cavity sectional area of the buffer area 1212 in the first runner 121 is less than the maximum inner cavity sectional area of the second runner 122; similarly, the fact that the sectional area of the inner cavity of the inner runner 125 is larger than the sectional area of the inner cavity of the third runner 123 means that: the minimum inner cavity sectional area of the inner runner 125 is larger than the maximum inner cavity sectional area of the third runner 123.

In order to effectively improve the yield of the castings 200, the applicant sets the sectional areas of the inner cavities of the first runners 121, the second runners 122, the third runners 123 and the ingate 125 in proportion. In the present embodiment, the ratio of the inner cavity cross-sectional areas of the first runner 121, the second runner 122, the third runner 123, and the ingate 125 is (1.2-1.7): (1.9-2.5): (0.65-0.95): (2-3). In this embodiment, the cross-sectional areas of the inner cavities of the second runner 122, the third runner 123, the inner cavity of the ingate 125, the non-buffer 1211, and the buffer 1212 are the same, respectively, along the flowing direction of the casting fluid; the "first runner 121" in the "ratio of the inner cavity sectional areas of the first runner 121, the second runner 122, the third runner 123, and the ingate 125" means the non-buffer area 1211 of the first runner 121; in other embodiments of the present application, the first sprue 121, the second sprue 122, the third sprue 123, and the ingate 125 may be referred to as the first sprue 121 itself because the first sprue 121 may be provided without the non-buffer area 1211 and the buffer area 1212.

As an example, the ratio of the inner cavity cross-sectional areas of the first runner 121, the second runner 122, the third runner 123, and the ingate 125 may be 1.2: 1.9: 0.65: 2. 1.5: 2: 0.85: 2.5 or 1.7: 2.5: 0.95: 3, etc. With the above cross-sectional area ratio, the casting gating system 100 located upstream of the riser 124 can further have a good slag-stopping effect, and the possibility that scum or impurities in the pouring fluid enter the casting cavity is reduced; meanwhile, the mold filling speed of pouring fluid at the downstream of the riser 124 entering the casting cavity can be reduced, the mold filling stability is ensured, the defects of sand inclusion or air entrainment and the like generated in the casting 200 are reduced, and the qualification rate of the casting 200 is improved.

Further, in the present embodiment, the ratio of the inner cavity sectional areas of the first runner 121, the second runner 122, the third runner 123, and the ingate 125 is 1.5: 2: 0.85: 2.5, better slag stopping and mold filling effects of the whole casting pouring system 100 can be realized.

In the present embodiment, the inner cavity cross-sectional area of the sprue 110 corresponds to the sum of the inner cavity cross-sectional areas of the first runners 121, the second runners 122, the third runners 123, and the inner cavity cross-sectional area of the inner runner 125 in all the flow dividing assemblies 120. In this embodiment, since the cross-sectional areas of the inner cavities of the sprue 110 and the second runner 122 are the same, the cross-sectional areas of the inner cavities of the third runner 123 and the ingate 125 are the same, the cross-sectional areas of the inner cavities of the non-buffer 1211 and the buffer 1212 are the same, and the ratio of the inner cavity cross-sectional area of the sprue 110 to the sum of the inner cavity cross-sectional areas of the first runner 121, the second runner 122, the third runner 123 and the ingate 125 in all the branching assemblies 120 is 1: (1.2-1.7): (1.9-2.5): (0.65-0.95): (2-3); further, the ratio of the inner cavity cross-sectional area of the sprue 110 to the sum of the inner cavity cross-sectional areas of the first runners 121, the second runners 122, the third runners 123, and the inner cavity cross-sectional area of the inner runners 125 in all the flow distribution assemblies 120 is 1: 1.5: 2: 0.85: 2.5.

the sum of the cross-sectional areas of the inner cavities of the first runners 121 in all the flow dividing assemblies 120 is: the cross-sectional area of the internal cavity at any point in the first runner 121 is multiplied by the number of flow distribution assemblies 120 in the direction of flow of the casting fluid, and so on.

Fig. 4 is an enlarged view of a portion a in fig. 2, and referring to fig. 1 to 4, since a portion of dross or impurities in the casting fluid is concentrated at a front end of a flowing direction of the casting fluid, for example, when the casting fluid is molten metal such as molten iron, the dross or impurities may be present at the front end of the flowing direction of the molten metal such as molten iron. In order to achieve a significant improvement in the slag-stopping effect of the overall casting gating system 100, and to effectively control the amount of dross and impurities in the gating fluid flowing into the risers 124, in this embodiment, the flow diversion assembly 120 further includes a receiving chamber 126, the receiving chamber 126 being downstream of the third runner 123 and in communication with the third runner 123, and having a tendency for fluid flowing through the third runner 123 to preferentially flow toward the receiving chamber 126. Because the riser 124 and the receiving chamber 126 are both located downstream of the third runner 123 and are both directly communicated with the third runner 123, the fluid flowing through the third runner 123 has a tendency to flow preferentially toward the receiving chamber 126, so that the receiving chamber 126 can trap scum or impurities at the front end of the flowing direction of the casting fluid, the possibility that the scum or impurities enter the riser 124 and then enter the casting cavity is reduced, and the yield of the casting 200 is improved.

Specifically, it is achieved that the fluid flowing through the third runner 123 has a tendency to flow preferentially towards the receiving chamber 126, in the following manner. In this embodiment, the third runner 123 is provided with a first through hole, a second through hole and a third through hole (not shown), the first through hole is communicated with the second runner 122, the second through hole is communicated with the receiving chamber 126, and the third through hole is communicated with the riser 124. The orientation of the first through holes is parallel to the orientation of the second through holes, and the orientation of the third through holes is at an angle to the orientation of the first through holes, so that the flow direction of the casting fluid entering the third runner 123 through the first through holes is the same as the flow direction of the casting fluid entering the receiving chamber 126 through the second through holes, and the flow direction of the casting fluid entering the third runner 123 through the first through holes is different from the flow direction of the casting fluid entering the risers 124 through the second through holes, thereby achieving that the fluid flowing through the third runner 123 has a tendency to flow preferentially towards the receiving chamber 126.

In other embodiments of the present application, the tendency of the fluid flowing through the third runner 123 to preferentially flow toward the receiving chamber 126 may be achieved in other ways, for example, the third runner 123 is provided with a first through hole, a second through hole and a third through hole, the first through hole is communicated with the second runner 122, the second through hole is communicated with the receiving chamber 126, and the third through hole is communicated with the riser 124; the level of the second through-hole is lower than the level of the first through-hole, and the level of the third through-hole is higher than the level of the first through-hole.

In this embodiment, the receiving chamber 126 is substantially elongated in shape. The shape of the receiving chamber 126 is not limited in the present application. Also, in other embodiments of the present application, the manifold assembly 120 may be provided without the receiving chamber 126.

The casting gating system 100 provided by the embodiment has at least the following advantages:

according to the semi-closed type casting system, at least two shunting assemblies 120 communicated with a sprue 110 are arranged, each shunting assembly 120 comprises a first transverse pouring gate 121, a second transverse pouring gate 122, a third transverse pouring gate 123, a riser 124 and an ingate 125 which are sequentially communicated, and the third transverse pouring gate 123, the first transverse pouring gate 121 and the second transverse pouring gate 122 in each shunting assembly 120 are arranged in a mode that the sectional area of an inner cavity is increased one by one, so that the sectional area of the inner cavity of the casting system 100 positioned at the upstream of the riser 124 presents the characteristic of a semi-closed type casting system which is increased firstly and then reduced, and the stable filling is ensured, and a good slag blocking effect is achieved; meanwhile, the sectional area of the inner cavity of the inner pouring channel 125 is larger than that of the inner cavity of the third cross pouring channel 123, so that the casting gating system 100 located at the downstream of the riser 124 has the characteristic of an open gating system, the mold filling speed of pouring fluid entering a casting cavity can be properly reduced, and the mold filling is stable. The number of the flow distribution assemblies 120 communicating with the sprue 110 is at least two, which can improve the productivity of the castings 200.

Further, the cavity level of the second runner 122 is higher than the cavity level of the first runner 121, and scum or impurities in the casting fluid can be mostly trapped in the cavity of the first runner 121. The inner pouring gate 125 has a wall thickness of 35-60mm, and separates the casting cavity from the riser 124 when the casting fluid is solidified, so as to ensure that the extrusion force generated by the volume expansion in the casting cavity during the solidification process of the casting fluid can act on the casting 200 body, thereby enhancing the feeding effect of the casting 200.

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

1. A casting gating system, comprising:

the straight pouring gate is arranged along the vertical direction; and

each flow distribution assembly is arranged along the horizontal direction and comprises a first cross gate, a second cross gate, a third cross gate, a riser and an ingate which are sequentially communicated; the ingate is used for being communicated with the casting cavity; the first cross pouring channel of each flow distribution assembly is communicated with the bottom of the straight pouring channel;

the third runner, the first runner and the second runner are arranged in a mode that the sectional area of an inner cavity is gradually increased, and the sectional area of the inner cavity of the inner runner is larger than that of the third runner.

2. A casting gating system according to claim 1, wherein the first runner, the second runner, the third runner, and the ingate have a ratio of internal cavity cross-sectional areas of (1.2-1.7): (1.9-2.5): (0.65-0.95): (2-3).

3. A casting gating system according to claim 2, wherein the first runner, the second runner, the third runner, and the ingate have an internal cavity cross-sectional area ratio of 1.5: 2: 0.85: 2.5.

4. a casting gating system according to any one of claims 1 to 3, wherein the cavity level of the second runner is higher than the cavity level of the first runner.

5. A casting gating system according to any one of claims 1 to 3, wherein the wall thickness of the ingate is 35 to 60 mm.

6. A casting gating system according to any one of claims 1 to 3, wherein the first runner is provided with a buffer zone and two non-buffer zones in communication with each other;

the two non-buffer areas are respectively positioned at the upstream and the downstream of the buffer area, and the sectional area of the inner cavity of the buffer area is larger than that of the inner cavity of the non-buffer area.

7. A casting gating system according to any one of claims 1 to 3, wherein the flow divider assembly further comprises an uptake chamber downstream of and in communication with the third runner, and fluid flowing through the third runner has a tendency to flow preferentially towards the uptake chamber.

8. A casting gating system according to claim 7, wherein the third runner is provided with a first through hole, a second through hole and a third through hole, the orientation of the first through hole and the orientation of the second through hole are parallel, and the orientation of the third through hole and the orientation of the first through hole form an included angle;

9. A casting gating system as claimed in any one of claims 1 to 3, wherein the height of the sprue is 300 and 500 mm.

10. A casting gating system according to any one of claims 1 to 3, wherein the at least two flow diversion assemblies are distributed about a peripheral array of the sprue.