CN102319891B - Gating system capable of effectively controlling air entrainment and slag entrainment and design method thereof - Google Patents

Gating system capable of effectively controlling air entrainment and slag entrainment and design method thereof Download PDF

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CN102319891B
CN102319891B CN 201110269115 CN201110269115A CN102319891B CN 102319891 B CN102319891 B CN 102319891B CN 201110269115 CN201110269115 CN 201110269115 CN 201110269115 A CN201110269115 A CN 201110269115A CN 102319891 B CN102319891 B CN 102319891B
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gate
area
sprue
slag
molten metal
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CN 201110269115
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CN102319891A (en
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傅排先
康秀红
李殿中
夏立军
李依依
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中国科学院金属研究所
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Abstract

The invention relates to a gating system capable of effectively controlling air entrainment and slag entrainment and a design method thereof. The gating system comprises a sprue, a runner and a plurality of ingates; the sprue is of a big-end-up conical structure, and the maximum cross-sectional area of the upper end is 1.5 to 3 times larger than the minimum cross-sectional area of the lower end; the runner is connected with the lower end of the sprue through a smooth curve, the radius of the curve is 1 to 5 times larger than the equivalent diameter of the runner, the cross-sectional radius of the curve is reduced, and the radius-reducing change is between 1 and 5 times larger than the cross-sectional equivalent radius of the runner; the ingates are connected with the runner, and the sum of the cross-sectional areas of the ingates is 2 to 10 times larger than the cross-sectional area of the runner. The invention solves the problem that the conventional gating system is not reasonable and can hardly guarantee the smooth filling and purity of molten metal, the phenomena of secondary oxidation, air entrainment and slag entrainment are prevented in the process of pouring molten metal, so that the quality of castings can be guaranteed, and the invention is suitable for the design of gating systems for the sand mold casting, metal mold casting, casting blank casting and precision casting of non-ferrous metal, ferrous metal, high-temperature alloy and the like.

Description

Running gate system and the method for designing thereof of a kind of effective control volume gas, volume slag
Technical field
The present invention relates to the running gate system of casting process, specifically a kind of do not have air gap and steadily fill running gate system and the method for designing thereof that type is effectively controlled volume gas, volume slag, generally is applicable to the Design of Runner System of sand casting, permanent mold casting, strand cast and the accurate casting of non-ferrous metal, ferrous metal, high temperature alloy etc.
Background technology
Traditional Design of Runner System normally closed (pressured) and open (unpressured) two kinds of methods.The basal area of the sprue of positive-pressure gating system, cross gate, ingate progressively diminishes, and the molten metal flow velocity is too fast, and turbulent flow is serious, easy scour cast, cause volume gas and inclusion defect (X ray is observed and shown, filling velocity causes turbulent flow and volume gas defective easily greater than 0.5m/s the time).The basal area of the sprue of unchoked running system, cross gate, ingate progressively enlarges, when causing liquid metal filling, in running channel, there is very air gaps, gas and molten metal interact, form oxide-film, gas and oxide-film are involved in the molten metal, form crackle and loose source, foundry goods are cracked and rarefaction defect.
Summary of the invention
At problems of the prior art, the object of the present invention is to provide the method for designing of the running gate system of a kind of effective control volume gas, volume slag;
Another object of the present invention is to provide the running gate system of a kind of effective control volume gas, volume slag, and the present running gate system of solution factory is unreasonable and be difficult to guarantee that molten metal steadily fills the problem of aspects such as type and degree of purity.
Technical scheme of the present invention is:
The method for designing of the running gate system of a kind of effective control volume gas, volume slag,
1) minimum speed that rises divided by metal bath surface in the casting mold according to the gross weight of casting of molten metal obtains the maximum filling time of molten metal, then according to flow equal principle and maximum filling time, at the terminal terminal minimum sectional area of sprue of determining the liquid metal filling that whole running gate system is required of sprue;
2) equate principle according to flow and determine the terminal minimum sectional area of good sprue, the maximum secting area of determining the sprue top is 1.5-3 times of terminal smallest cross-section area;
3) according to the terminal minimum sectional area of the sprue of step 1), be the sectional area that the 1-3 of sprue minimum sectional area doubly designs cross gate according to the sectional area of cross gate;
4) be connected the negative pressuren zone that the place produces according to molten metal with cross gate at sprue, design circular arc bend, the radius of circular arc bend be the cross gate equivalent diameter 1-5 doubly, the cross section radius of circular arc bend carries out the reducing design, change in radius be cross gate sectional area equivalent redius 1-5 doubly between;
5) according to ingate sectional area sum be the cross gate sectional area 2-10 doubly, design a plurality of ingates.
Method for designing of the present invention comprises that also the design sprue exceeds the height of casting pressing port, make apart from foundry goods farthest rising head center and sprue top line and the control of horizontal angle 5 spend-45 spend between.
Sprue is up big and down small tapered structure, and the terminal minimum sectional area of sprue is obtained by following formula: Q=A 2V 2, V 2 = 2 g H P B 1 , H P = h + H 2 , B 1=1.25+n 1* 0.25; Wherein: Q is the molten metal flow, the m of unit 3/ s, A 2Be the terminal minimum sectional area of sprue, the m of unit 2V 2Be the sprue tip speed, the m/s of unit; H PBe the average hydrostatic head of running gate system, the m of unit; G is acceleration of gravity; H is cup and sprue molten metal height overall, the m of unit; B 1For molten metal at sprue self-energy loss factor, n 1For sprue turns the quantity of 90 ℃ of bends, h is the height of cup molten metal, the m of unit.
Cross gate is designed to first cross gate and two parallel cross gates of second cross gate, and first cross gate is identical with the sectional area of second cross gate, and the 1-3 that its sectional area is the sprue minimum sectional area doubly; Distance between first cross gate and second cross gate is between 10-200mm.
A plurality of resistance slag cross gates are set between first cross gate and second cross gate, resistance slag cross gate is the necking down structure, its sectional area reduces to second cross gate gradually from first cross gate, and maximum secting area is 0.2-1 times of cross gate sectional area, and minimum sectional area is 0.2-0.7 times of maximum secting area; The length of resistance slag cross gate is 1-2 times of parallel cross gate equivalent diameter.
The running gate system of a kind of effective control volume gas, volume slag comprises:
Sprue is up big and down small tapered structure, and the upper end the maximum cross-section area is 1.5-3 times of terminal smallest cross-section area;
Cross gate is connected with the lower end of sprue by smooth circular arc bend, and the radius of circular arc bend is 1-5 times of cross gate equivalent diameter, and the cross section radius of circular arc bend carries out the reducing design, between 1-5 times that reducing changes at cross gate sectional area equivalent redius;
Be connected the multiple tracks ingate on the cross gate, the 2-10 that a plurality of ingate sectional area sums are the cross gate sectional area doubly.
Cross gate is first cross gate and two parallel cross gates of second cross gate, and first cross gate is identical with the sectional area of second cross gate, and the 1-3 that its sectional area is the sprue minimum sectional area doubly; Distance between first cross gate and second cross gate is between 10-200mm.
A plurality of resistance slag cross gates are set between first cross gate and second cross gate, resistance slag cross gate is the necking down structure, its sectional area reduces to second cross gate gradually from first cross gate, and maximum secting area is 0.2-1 times of cross gate sectional area, and minimum sectional area is 0.2-0.7 times of maximum secting area; The length of resistance slag cross gate is 1-2 times of parallel cross gate equivalent diameter.
The height that sprue exceeds casting pressing port satisfy foundry goods farthest the line on rising head center and sprue top and the control of horizontal angle between 5 degree-45 degree.
The present invention has following beneficial effect:
1. because the present invention adopts sprue smallest cross-sectional method for designing to make molten metal constantly be in full state in running gate system, and no gas and oxide-film are involved in the molten metal, defective such as be difficult for causing crackle and loosen;
2. adopt smooth circular arc bend transition to replace traditional right angle transition, the radius at circular arc transition turning is 1-5 times of cross gate equivalent diameter, change in radius be cross gate sectional area equivalent redius 1-5 doubly between, avoid in running gate system, producing negative pressuren zone, eliminate negative pressuren zone, avoid rolling up gas, guarantee the degree of purity of molten metal;
3. the present invention adopts the utilization of parallel cross gate design and the resistance slag technology between parallel cross gate, not only make molten metal in running gate system, be in full state, no air gap, no disturbance, do not roll up gas and do not roll up slag, defectives such as foundry goods is difficult for cracking, loosens and is mingled with, performance and the service life of greatly having improved foundry goods simultaneously;
The a plurality of ingate sectional area of the present invention sum be the cross gate sectional area 2-10 doubly, can guarantee the metal flow quantity effectively, avoid molten metal in the foundry goods die cavity, to produce simultaneously and splash;
The running gate system sprue of the present invention height that exceeds casting pressing port satisfy foundry goods farthest rising head center and sprue upper end line and the control of horizontal angle between 5 degree-45 are spent, adopt the advantage of this angle to be to be conducive to the long-range mobile of metal, avoid the reduction significantly of molten metal temperature;
6. Pouring System Design Method of the present invention generally is applicable to system's design of the technologies such as sand casting, permanent mold casting, hot investment casting of various alloys, along with the raising to casting quality and service life, steadily the filling the type running gate system and will become new design principle of this effective control volume gas, volume slag.
Description of drawings
Fig. 1 is sprue of the present invention and circular arc bend structural representation;
Fig. 2 is the parallel cross gate of the present invention and resistance slag cross gate structural representation;
Fig. 3 is traditional running gate system structural representation, and wherein Fig. 3 (a) is rearview, and Fig. 3 (b) is front view;
Fig. 4 is that the embodiment of the invention 1 is used for bed piece running gate system structural representation;
Fig. 5 is used for the simulation drawing of bed piece running gate system for the embodiment 1 that obtains by computer simulation;
Fig. 6 is embodiment 1 bed piece spray figure;
Fig. 7 is the running gate system structural representation that the embodiment of the invention 3 is used for ingot steel casting, wherein 7(a) be vertical view, 7(b) be side view;
Wherein, 1 is sprue; 2 is the terminal minimum sectional area of sprue; 3 is the circular arc bend; 4 is cross gate; 41 is first cross gate; 42 is second cross gate; 5 are resistance slag cross gate; 6 is ingate; 31 is the sprue of traditional running gate system; 32 is the cross gate of traditional running gate system; 33 is the ingate of traditional running gate system; 34 is lathe; 61 is steel ingot.
The specific embodiment
Below in conjunction with drawings and Examples in detail the present invention is described in detail.
The present invention effectively controls the method for designing of the running gate system of volume gas, volume slag:
Obtain the maximum filling time of molten metal divided by the minimum speed of metal bath surface rising in the casting mold according to the gross weight of casting of molten metal, according to flow equal principle and maximum filling time, at the terminal minimum sectional area of determining the liquid metal filling that whole running gate system is required of sprue;
The minimum speed that metal bath surface rises in the casting mold is according to the difference of each casting mold kind, obtain by the document of searching technical field, obtain the maximum filling time of the casting mold of required cast according to the minimum speed of finding, obtain the flow of molten metal in conjunction with the cumulative volume of molten metal, formula is: Wherein: Q is the molten metal flow, the m of unit 3/ s, V: the cumulative volume of casting of molten metal, unit are m 3T: the maximum filling time of casting of molten metal, unit are s.Obtain the molten metal flow and just can be used for determining the terminal minimum sectional area of the needed sprue of different casting mold kinds;
The terminal minimum sectional area of sprue is obtained by following formula: Q=A 2V 2, B 1=1.25+n 1* 0.25; Wherein: Q is the molten metal flow, the m of unit 3/ s, A 2Be the area of sprue end, the m of unit 2V 2Be the sprue tip speed, the m/s of unit; H PBe the average hydrostatic head of running gate system, the m of unit; G is acceleration of gravity; H is cup and sprue molten metal height overall, the m of unit; B 1For molten metal at sprue self-energy loss factor, n 1For sprue turns the quantity of 90 ℃ of bends, h is the height of cup molten metal, the m of unit.
Equate principle and determine good minimum sectional area that the maximum secting area of determining the sprue top is 1.5-3 times of terminal smallest cross-section area according to flow; The formula that specifically passes through is: A 2V 2=A 1V 1, Can obtain the maximum secting area at sprue top, wherein: A 1Be the maximum secting area at sprue top, the m of unit 2V 1Be the entrance velocity at sprue top, the m/s of unit; G is acceleration of gravity, 9.8m 2/ s; H is the height of cup molten metal, the m of unit;
According to the minimum sectional area of step 1), the sectional area of determining cross gate is 1-3 times of sprue minimum sectional area;
Be connected the negative pressuren zone that the place produces according to molten metal with cross gate 4 at sprue 1, when being right-angle design, the corner produces negative pressure and causes volume gas, size according to the negative pressure that produces, carry out the smooth circular arc bend 3 of design of size and the sectional area reducing size of analytical calculation arc radius according to hydrodynamics, the radius of circular arc bend 3 is 1-5 times of cross gate 4 equivalent diameters, the cross section radius of circular arc bend 3 carries out reducing design, change in radius be cross gate sectional area equivalent redius 1-5 doubly between; Carry out the negative pressure test, when molten metal enters this zone, do not have the phenomenon of rolling up gas, illustrate that the negative pressure that produces is very little.
According to ingate 33 sectional area sums be cross gate 4 sectional areas 2-10 doubly, design a plurality of ingates 6.The quantity of ingate is determined in conjunction with the kind of casting mold according to the size of cross-sectional area.
Method for designing of the present invention also can be designed to cross gate 4 first cross gate 41 and 42 two parallel cross gates of second cross gate, and first cross gate 41 is identical with the sectional area of second cross gate 42, and the 1-3 that its sectional area is the sprue minimum sectional area doubly; Distance between first cross gate 41 and second cross gate 42 is between 10-200mm.
A plurality of resistance slag cross gates 5 are set between first cross gate 41 and second cross gate 42, resistance slag cross gate 5 is the necking down structure, its sectional area reduces gradually from first cross gate, 41 to second cross gates 42, maximum secting area is 0.2-1 times of cross gate sectional area, and minimum sectional area is 0.2-0.7 times of maximum secting area; The length of resistance slag cross gate 5 is 1-2 times of parallel cross gate equivalent diameter.
Sprue 1 exceeds the height of casting pressing port, make apart from foundry goods farthest rising head center and sprue 1 upper end line and the control of horizontal angle between 5 degree-45 degree.
According to a kind of effective control volume gas of said method design, the running gate system of volume slag, as Fig. 1,2 and shown in Figure 4, structure is as described below: comprising: sprue 1, be up big and down small tapered structure, the upper end the maximum cross-section area is 1.5-3 times of terminal smallest cross-section area, up big and down small design is conducive to gas, be mingled with and float to the top, can avoid molten metal washing away sprue 1 simultaneously; Cross gate 4, be connected with the lower end of sprue 1 by smooth circular arc bend 3, the radius of circular arc bend 3 is 1-5 times of cross gate 4 equivalent diameters, and the cross section radius of circular arc bend 3 carries out the reducing design, between 1-5 times that reducing changes at cross gate sectional area equivalent redius; Be connected the multiple tracks ingate 6 on the cross gate, the 2-10 that a plurality of ingate 6 sectional area sums are cross gate 4 sectional areas large scale designing technique doubly.
As shown in Figure 2, cross gate 4 is first cross gate 41 and 42 two parallel cross gates of second cross gate, and first cross gate 41 is identical with the sectional area of second cross gate 42, and the 1-3 that its sectional area is the sprue minimum sectional area doubly; Distance between first cross gate 41 and second cross gate 42 is between 10-200mm, it is steady to be conducive to control liquid metal filling by parallel cross gate, make molten metal in running gate system, constantly be in full state, prevent that gas and oxide-film are involved in molten metal and cause crackle and gas hole defect.
A plurality of resistance slag cross gates 5 are set between first cross gate 41 and second cross gate 42, resistance slag cross gate 5 is the necking down structure, its sectional area reduces gradually from first cross gate, 41 to second cross gates 42, maximum secting area is 0.2-1 times of cross gate sectional area, and minimum sectional area is 0.2-0.7 times of maximum secting area; The length of resistance slag cross gate 5 is 1-2 times of parallel cross gate equivalent diameter, and the slagging-off technology between two cross gates prevents that bits and the foreing impuritys in the molten metal from entering in the foundry goods, causes cinder hole and field trash to exceed standard; Guarantee the degree of purity of molten metal.
As shown in Figure 4, ingate 6 can be made as multiple tracks for large scale, and ingate sectional area sum has guaranteed the molten metal flow for 2-10 times of parallel cross gate sectional area, avoids molten metal to produce in the foundry goods die cavity simultaneously and splashes.
Embodiment 1
Certain model bed piece cast, cast material HT250,1360 ℃ of pouring temperatures, casting weight is 12t, its Design of Runner System is, sprue 1 is designed to tapered, and wherein the sprue tip size is Φ 90mm, and the terminal minimum sectional area of sprue is of a size of Φ 55mm, the height of sprue 1 is 1650mm, its design principle is that flow equates that principle, up big and down small design are conducive to gas, are mingled with and float to the top, can avoid molten metal washing away sprue simultaneously.
As shown in Figure 4, sprue 1 adopts 3 transition of circular arc bend with cross gate 4 corners, circular arc bend 3 radiuses are 80mm, cross gate 4 equivalent diameters are 60mm, the cross-sectional area of circular arc bend 3 carries out the reducing design, and vary in diameter is avoided the corner to produce negative pressure and caused volume gas between 55mm-90mm, Fig. 3 (a) and Fig. 3 (b) are traditional running gate system, can find out that the present invention is with respect to difference of the prior art.
Utilize the parallel design of two cross gates, parallel cross gate, first cross gate 41 is identical with the sectional area of second cross gate 42, and its sectional area diameter is 60mm, and the distance between the cross gate is 50mm.It is steady to be conducive to control liquid metal filling by parallel cross gate, makes molten metal be in full state constantly in running gate system.
Design multiple tracks resistance slag cross gate 5 between parallel cross gate, the distance between the resistance slag cross gate 5 is 55mm, resistance slag cross gate 5 adopts the necking down design, its sectional area reduces gradually, its maximum secting area diameter is 40mm, and the minimum sectional area diameter is 30mm, and its length i.e. distance between the parallel cross gate.Ingate 6 large scale designing techniques, ingate 6 can be made as 10 roads, and ingate sectional area sum is 230mm 2The present invention pours into a mould blank and sees shown in Figure 6, no gas and oxide-film are involved in the molten metal in the casting process, do not cause crackle and gas hole defect, because adopt the design of resistance slag, bits and foreing impuritys in the molten metal enter foundry goods, cinder hole and field trash are little, during cast, no molten metal produces in the foundry goods die cavity and splashes.
By the design parameter to running gate system of the present invention, the process computer simulation obtains the simulation drawing that is used for the bed piece running gate system as shown in Figure 5, has verified that by simulation drawing the design of running gate system of the present invention is rational.
Embodiment 2
Certain model bed piece cast, cast material HT250,1370 ℃ of pouring temperatures, casting weight is 12t, its Design of Runner System is, sprue 1 is designed to tapered, and wherein the sprue tip size is Φ 95mm, and sprue 1 tip dimensions is Φ 60mm, the height of sprue 1 is 1750mm, its design principle is that flow equates that principle, up big and down small design are conducive to gas, are mingled with and float to the top, can avoid molten metal washing away sprue 1 simultaneously.
Sprue 1 adopts arc transition with cross gate 4 corners, circular arc bend 3 radiuses are 90mm, cross gate 4 equivalent diameters are 70mm, the circular arc bend carries out the reducing design, vary in diameter is between 60mm-100mm, from sprue 1 to cross gate 4, diameter of section becomes greatly gradually, avoids the corner to produce negative pressure and causes volume gas.Utilize the parallel design of two cross gates, the sectional area of parallel cross gate is identical, and its sectional area diameter is diameter 70mm, and the distance between two cross gates is 60mm.It is steady to be conducive to control liquid metal filling by parallel cross gate, makes molten metal be in full state constantly in running gate system.Design multiple tracks resistance slag cross gate 5 can be decided according to space and pouring temperature between parallel cross gate, and the distance between the resistance slag cross gate 5 is 60mm, resistance slag cross gate 5 adopts the necking down design, its sectional area reduces gradually, and its maximum secting area diameter is 50mm, and the minimum sectional area diameter is 30mm.Ingate 6 large scale designing techniques, ingate 6 can be made as 4 roads, and ingate 6 sectional area sums are 340mm 2Adopt the lathe of the running gate system cast of present embodiment to be difficult for after tested cracking, unloose and defective such as be mingled with, when cast, be in full state in the running gate system, no air gap, no disturbance, do not roll up gas and do not roll up slag.
Embodiment 3
The 15t ingot steel casting, cast material 40Cr2,1560 ℃ of pouring temperatures, weight are 15t, as shown in Figure 6: its Design of Runner System is, sprue is designed to tapered, and wherein the sprue tip size is Φ 85mm, and the sprue tip dimensions is Φ 50mm, the height of sprue is 1550mm, its design principle is that flow equates that principle, up big and down small design are conducive to gas, are mingled with and float to the top, can avoid molten metal washing away sprue simultaneously.
Sprue 1 adopts the transition of circular arc bend with cross gate 4 corners, the radius of circular arc bend 3 is 65mm, and cross gate 4 equivalent diameters are 65mm, and circular arc bend 3 carries out the reducing design, the diameter reducing changes between 60mm-85mm, avoids the corner to produce negative pressure and causes volume gas.Utilize the parallel design of two cross gates, the sectional area of parallel cross gate is identical, and its sectional area diameter is diameter 65mm, and the distance between the cross gate is 65mm.It is steady to be conducive to control liquid metal filling by parallel cross gate, makes molten metal be in full state constantly in running gate system.Design 9 roads resistance slag cross gate 5 between parallel cross gate, the distance between the resistance slag cross gate 5 is 65mm, and resistance slag cross gate 5 adopts the necking down design, and its sectional area reduces gradually, and its maximum secting area diameter is 50mm, the minimum sectional area diameter is 35mm.Ingate 6 large scale designing techniques, ingate can be made as together, and ingate sectional area sum is 300mm 2
The course of work of the present invention and result:
The present invention is by the minimum sectional area at the required liquid metal filling of the whole running gate system of sprue tip designs, and utilize the parallel design control of two cross gates liquid metal filling steady, make molten metal in running gate system, be in full state constantly, prevent that gas and oxide-film are involved in the molten metal, cause crackle and gas hole defect; By utilizing the slagging-off technology such as resistance slag design between two cross gates, prevent that bits and the foreing impuritys in the molten metal from entering in the foundry goods, cause cinder hole and field trash to exceed standard; Arc transition is adopted in sprue and cross gate corner, change in radius be cross gate sectional area equivalent redius 2-3 doubly between, avoid the corner to produce negative pressure and cause volume gas, guarantee the degree of purity of molten metal; Ingate large scale designing technique has guaranteed the molten metal flow, avoids molten metal to produce in the foundry goods die cavity simultaneously and splashes.
The result of embodiment shows that the present invention has designed the running gate system of a kind of effective control volume gas, volume slag, guarantees the filling time of molten metal by the design of sprue minimum sectional area; Utilize two cross gate designs and arc transition to guarantee that molten metal is full of running gate system; Do not enter the foundry goods die cavity by the slag that is mingled with, rolls up in the control slag technical guarantee molten metal.This Design of Runner System, secondary oxidation, volume gas and the volume slag phenomenon of having avoided molten metal to produce at casting process have guaranteed that the degree of purity of molten metal guarantees casting quality.

Claims (9)

1. effectively control the method for designing of rolling up gas, rolling up the running gate system of slag for one kind, it is characterized in that: may further comprise the steps:
1) minimum speed that rises divided by metal bath surface in the casting mold according to the gross weight of casting of molten metal obtains the maximum filling time of molten metal, then according to flow equal principle and maximum filling time, at the terminal terminal minimum sectional area of sprue of determining the liquid metal filling that whole running gate system is required of sprue;
2) according to flow equal principle and the terminal minimum sectional area of definite good sprue, the maximum secting area of determining the sprue top is 1.5-3 times of terminal minimum sectional area;
3) according to the terminal minimum sectional area of the sprue of step 1), be the sectional area that the 1-3 of sprue minimum sectional area doubly designs cross gate according to the sectional area of cross gate;
4) be connected the negative pressuren zone that the place produces according to molten metal with cross gate at sprue, design circular arc bend, the radius of circular arc bend be the cross gate equivalent diameter 1-5 doubly, the cross section radius of circular arc bend carries out the reducing design, change in radius be cross gate sectional area equivalent redius 1-5 doubly between;
5) according to ingate sectional area sum be the cross gate sectional area 2-10 doubly, design a plurality of ingates.
2. roll up the method for designing of the running gate system of gas, volume slag according to the described effective control of claim 1, it is characterized in that: comprise that also the design sprue exceeds the height of casting pressing port, make apart from foundry goods farthest rising head center and sprue top line and the control of horizontal angle 5 spend-45 spend between.
3. roll up the method for designing of the running gate system of gas, volume slag according to the described effective control of claim 1, it is characterized in that: sprue is up big and down small tapered structure, and the terminal minimum sectional area of sprue is obtained by following formula: Q=A 2V 2, V 2 = 2 g H P B 1 , H P = h + H 2 , B 1=1.25+n 1* 0.25; Wherein: Q is the molten metal flow, the m of unit 3/ s, A 2Be the terminal minimum sectional area of sprue, the m of unit 2V 2Be the sprue tip speed, the m/s of unit; HP is the average hydrostatic head of running gate system, the m of unit; G is acceleration of gravity; H is cup and sprue molten metal height overall, the m of unit; B 1For molten metal at sprue self-energy loss factor, n 1For sprue turns the quantity of 90 ℃ of bends, h is the height of cup molten metal, the m of unit.
4. roll up the method for designing of the running gate system of gas, volume slag according to the described effective control of claim 1, it is characterized in that: cross gate is designed to first cross gate and two parallel cross gates of second cross gate, first cross gate is identical with the sectional area of second cross gate, and the 1-3 that its sectional area is the sprue minimum sectional area doubly; Distance between first cross gate and second cross gate is between 10-200mm.
5. roll up the method for designing of the running gate system of gas, volume slag according to the described effective control of claim 4, it is characterized in that: a plurality of resistance slag cross gates are set between first cross gate and second cross gate, resistance slag cross gate is the necking down structure, its sectional area reduces to second cross gate gradually from first cross gate, maximum secting area is 0.2-1 times of cross gate sectional area, and minimum sectional area is 0.2-0.7 times of maximum secting area; The length of resistance slag cross gate is 1-2 times of parallel cross gate equivalent diameter.
6. effective control volume gas of the described method for designing of claim 1, the running gate system of volume slag is characterized in that, comprising:
Sprue is up big and down small tapered structure, and the top maximum secting area is 1.5-3 times of terminal minimum sectional area;
Cross gate is connected with the lower end of sprue by smooth circular arc bend, and the radius of circular arc bend is 1-5 times of cross gate equivalent diameter, and the cross section radius of circular arc bend carries out the reducing design, between 1-5 times that reducing changes at cross gate sectional area equivalent redius;
Be connected the multiple tracks ingate on the cross gate, the 2-10 that a plurality of ingate sectional area sums are the cross gate sectional area doubly.
7. roll up the running gate system of gas, volume slag according to the described effective control of claim 6, it is characterized in that, cross gate is first cross gate and two parallel cross gates of second cross gate, and first cross gate is identical with the sectional area of second cross gate, and the 1-3 that its sectional area is the sprue minimum sectional area doubly; Distance between first cross gate and second cross gate is between 10-200mm.
8. roll up the running gate system of gas, volume slag according to the described effective control of claim 7, it is characterized in that, a plurality of resistance slag cross gates are set between first cross gate and second cross gate, resistance slag cross gate is the necking down structure, its sectional area reduces to second cross gate gradually from first cross gate, maximum secting area is 0.2-1 times of cross gate sectional area, and minimum sectional area is 0.2-0.7 times of maximum secting area; The length of resistance slag cross gate is 1-2 times of parallel cross gate equivalent diameter.
9. according to the running gate system of the described effective control volume of claim 6 gas, volume slag, it is characterized in that, the height that sprue exceeds casting pressing port satisfy foundry goods farthest rising head center and sprue top line and the control of horizontal angle 5 spend-45 spend between.
CN 201110269115 2011-09-13 2011-09-13 Gating system capable of effectively controlling air entrainment and slag entrainment and design method thereof CN102319891B (en)

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CN102744370A (en) * 2012-07-25 2012-10-24 湖南江滨机器(集团)有限责任公司 Pouring system for permanent mold gravity casting aluminum piston
CN103231039B (en) * 2013-04-16 2014-12-31 莆田市荣兴机械有限公司 Die casting die for manufacturing lower snapping heads
CN105642835A (en) * 2016-01-20 2016-06-08 烟台新潮铸造有限公司 Pouring method for eliminating oxidizing slag on working table casting
CN106040981A (en) * 2016-08-16 2016-10-26 辽源市福源重型矿山机械制造有限公司 Pouring system for sand casting
CN107350427A (en) * 2017-05-25 2017-11-17 南通宏德机电有限公司 A kind of super thick strip running gate system of injection machine and its pouring technology
CN107716871B (en) * 2017-09-22 2020-02-18 共享装备股份有限公司 Pouring method for negative pressure lost foam casting
CN107931529B (en) * 2017-11-24 2019-05-17 共享装备股份有限公司 Closing-unchoked running system
CN111036849A (en) * 2019-12-02 2020-04-21 中国科学院金属研究所 Pouring system for controlling slag and purifying horizontally pouring gate and design method thereof
CN110918893A (en) * 2019-12-03 2020-03-27 中国船舶重工集团公司第十二研究所 Design method of flow-adaptive curve-shaped gravity pouring system

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SU1161225A1 (en) * 1983-11-09 1985-06-15 Предприятие П/Я Р-6930 Ceramic ingate system of mould for centrifugal casting about vertical axis
JPS6134899B2 (en) * 1984-08-07 1986-08-09 Toyota Motor Co Ltd
CN1552542A (en) * 2003-11-28 2004-12-08 中国科学院金属研究所 Design method and system for no air gap stable filling casting
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CN101332490B (en) * 2008-07-04 2011-03-30 日月重工股份有限公司 Medium-pressure heavy-section outer-cylinder iron casting gating system of steam turbine

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