CN107931529A - Close unchoked running system - Google Patents
Close unchoked running system Download PDFInfo
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- CN107931529A CN107931529A CN201711188523.3A CN201711188523A CN107931529A CN 107931529 A CN107931529 A CN 107931529A CN 201711188523 A CN201711188523 A CN 201711188523A CN 107931529 A CN107931529 A CN 107931529A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
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Abstract
One kind closing unchoked running system, it is related to casting technology field, including sprue, cross gate, several passageway piece, ingates, by varying the depth-width ratio of cross gate and the ratio of width to height of passageway piece, and the setting position of first passageway piece and last passageway piece, to provide enough distances and space to cross gate, make to flow into the top that miscellaneous slag in the molten metal of cross gate floats on cross gate, miscellaneous slag is avoided to flow into the piece of passageway, and then flowed into by passageway piece in cavity, influence the quality of casting.And the situation that filter screen is set in cross gate is eliminated at the same time, it is cost-effective.
Description
Technical field
The present invention relates to casting technology field, and in particular to a kind of closing-unchoked running system.
Background technology
Traditional running gate system according to the proportionate relationship in running gate system each unit section, can be divided into it is closed, semi-enclosed,
Open, closing-open 4 type：（1）On ingate, molten metal easily fills in the choked flow section of positive-pressure gating system
Full running gate system, pushing off the slag ability is stronger, and the consumption of common metal liquid is few, and clears up conveniently, but the flow velocity for filling type liquid stream is fast, scouring force
Greatly, splash is also easy to produce, causes volume gas and inclusion defect；（2）Enlarged running system choked flow section is on ingate, cross gate
Section is maximum, and running gate system can be full of, but more closed evening, had certain pushing off the slag ability, filled the stationarity of type and to cavity
Scouring force it is better than closed；（3）Unchoked running system choked flow section fills that type is steady, and scouring force is small on sprue, but
Molten metal is not easy to be full of running gate system, and state is moved in pressure free current, and pushing off the slag ability is poor, and the consumption of common metal liquid is more, is not easily cleaned；
（4）Closing-unchoked running system, closes before choked flow section, opens thereafter, therefore not only improves pushing off the slag, and it is steady to make to fill type,
Have the advantages of closed and open concurrently；But choked flow section can not be generally rapidly filled with cross gate, cross gate（Unless cross gate
Below casting）, there is very big air gap, be easy to cause volume gas and inclusion defect.
The content of the invention
In view of this, it is necessary to provide a kind of pushing off the slag effect good while cost-effective closing-unchoked running system, wrap
Sprue, cross gate, several passageway piece, ingates are included, the sprue is cylindric, and lower end and the cross gate of sprue hang down
It is direct-connected logical, sprue base is set in sprue bottom, passageway piece is arranged on the side wall of cross gate, and one end of passageway piece and horizontal stroke
Running channel connects, and the other end of passageway piece is connected with ingate, and ingate is arranged on passageway piece bottom, and ingate is connected with cavity,
It is provided with slag trap in cross gate end, the cross gate section is narrow high type structure, depth-width ratio >=2 of cross gate:1, it is described
Passageway piece is wide thin type structure, the ratio of width to height >=4 of passageway piece:1, so that the molten metal in cross gate is flowed slowly into by passageway piece
Into cavity, avoid molten metal splashing and produce vortex, the position that passageway piece is connected with cross gate is less than the height of cross gate
1/2-2/3, so that the scum silica frost of the molten metal in cross gate is highly higher than the height of passageway piece, and then avoids scum silica frost from flowing into passageway piece
Interior, the quantity of passageway piece is set according to the size of casting, and the passageway piece nearest apart from sprue is first passageway piece, distance
The farthest passageway piece of sprue is last passageway piece, and first passageway piece is with a distance from sprue equal to sprue height
2 times so that the miscellaneous slag in molten metal floats without flowing into passageway piece, last passageway piece with a distance from cross gate end also etc.
In 2 times of sprue height, so that the miscellaneous slag in cross gate is discharged into slag trap through cross gate end, without into passageway
Piece, is arranged on the interval of passageway piece of centre more than or equal to 2 times of passageway piece width, is made with providing enough distances for cross gate
Miscellaneous slag in cross gate avoids flowing into passageway piece influence casting quality floating to the top of cross gate.
Preferably, be provided with cross gate extension in cross gate end, the bottom of cross gate extension be it is horizontal, it is horizontal to pour
The top of road extension is ramp-like to dip down, and prolongs from the initiating terminal of cross gate extension to cross gate extension end, cross gate
The cross-sectional area of long section tapers into, and to prevent molten metal flow to cross gate extension end from the situation of turning back occur, slag trap is set
Put in the bottom of cross gate extension end, to be initially flowed into by the guiding of cross gate extension in the molten metal to cross gate
Slag inclusion guide into slag trap.
Preferably, the ingate includes entrance and outlet section, and the entrance is isometrical L-type passage, and outlet section is
Vertical variable diameter passage, the cross-sectional area of outlet section gradually increase from lower end to upper end, the minimum sectional area and entrance of outlet section
Sectional area it is equal so that molten metal is flowed slowly into cavity by ingate, avoid molten metal from producing whirlpool when flowing into cavity
Stream and splashing.
Preferably, the entrance of ingate is arranged on the position of the 1/3-2/3 of passageway leaf length, and is set in passageway piece end
The passageway piece extension tilted down is equipped with, to collect the miscellaneous slag of the molten metal flowed into the piece of passageway.
Preferably, the outlet section of ingate is inverted cone channel, and the top of outlet section is connected with cavity, the top of outlet section
Bore be more than bottom bore so that molten metal from outlet section fill type upwards when flow velocity it is slack-off, play current stabilization and avoid slag
Effect, tip section area and the bottom sectional area ratio of outlet section are 6:1~10:1.
Preferably, the ratio between area of section of sprue, cross gate, passageway piece and ingate=1:1.5~3:0.9~1:0.8~
0.9, choked flow section is arranged on ingate, so as to fulfill being rapidly filled with for cross gate, effectively avoids flowing into the metal of passageway piece
Liquid gas enclosure and it is mingled with.
The present invention uses above-mentioned technical proposal, and its advantage is：Including sprue, cross gate, several passageway pieces,
Ingate, by varying the depth-width ratio of cross gate and the ratio of width to height of passageway piece, and first passageway piece and last passageway piece
Setting position, to provide enough distance and space to cross gate, make to flow into miscellaneous slag in the molten metal of cross gate and float on
The top of cross gate, avoids miscellaneous slag from flowing into the piece of passageway, and then is flowed into by passageway piece in cavity, influences the matter of casting
Amount.And the situation that filter screen is set in cross gate is eliminated at the same time, it is cost-effective.
Brief description of the drawings
Fig. 1 is the structure diagram of closing-unchoked running system of a better embodiment.
Fig. 2 is the structure diagram of another angle of closing-unchoked running system in Fig. 1.
Fig. 3 is the partial enlarged view of A-A sectional views in Fig. 2.
In figure：Closing-unchoked running system 10, sprue 20, sprue base 21, cross gate 30, cross gate extension
31st, slag trap 32, passageway piece 40, passageway piece extension 41, ingate 50, entrance 51, outlet section 52.
Embodiment
Fig. 1 to Fig. 3 is refer to, an embodiment of the present invention provides a kind of closing-unchoked running system 10, including sprue
20th, cross gate 30, several passageway pieces 40, ingate 50, the sprue 20 are cylindric, and the lower end of sprue 20 is poured with horizontal
30 vertical connection of road, molten metal is drained to cross gate 30 by sprue 20, sprue base is set in 20 bottom of sprue
21, to mitigate impact of the molten metal to 20 bottom of sprue, while the bubble emersion in the molten metal that sprue 20 is flowed down, mistake
Road piece 40 is arranged on the side wall of cross gate 30, and one end of passageway piece 40 is connected with cross gate 30, the other end of passageway piece 40
Connected with ingate 50, ingate 50 is arranged on 40 bottom of passageway piece, and ingate 50 is connected with cavity, to be incited somebody to action by passageway piece 40
Molten metal in cross gate 30 is drained to ingate 50, and then is guided molten metal to cavity by ingate 50 and poured into a mould,
Ingate 50 can not also be set when pouring into a mould light casting, is directly guided molten metal to cavity by passageway piece 40, in cross gate
30 ends are provided with slag trap 32, and to collect the miscellaneous slag of outflow in cross gate 30,30 section of cross gate is narrow high type structure,
Depth-width ratio >=2 of cross gate:1, the passageway piece 40 is wide thin type structure, the ratio of width to height >=4 of passageway piece:1, so that cross gate 30
Interior molten metal is flowed slowly into cavity by passageway piece 40, is avoided molten metal splashing and is produced vortex, passageway piece 40 and horizontal stroke
The position that running channel 30 connects is less than the 1/2-2/3 of the height of cross gate 30, so that the scum silica frost height of the molten metal in cross gate is high
In the height of passageway piece 40, and then scum silica frost is avoided to flow into passageway piece 40, the quantity of passageway piece 40 is set according to the size of casting
Put, the passageway piece 40 nearest apart from sprue 20 is first passageway piece 40, and the passageway piece 40 farthest apart from sprue 20 is most
The latter passageway piece 40, first passageway piece 40 is equal to 2 times of 20 height of sprue with a distance from sprue 20, so that molten metal
Interior miscellaneous slag floats without flowing into passageway piece 40, last passageway piece 40 is also equal to sprue with a distance from 30 end of cross gate
2 times of 20 height, so that the miscellaneous slag in cross gate 30 is discharged into slag trap 32 through 30 end of cross gate, without entering passageway piece
40, the interval for being arranged on the passageway piece 40 of centre is more than or equal to 2 times of 40 width of passageway piece, enough to be provided for cross gate 30
Distance makes the miscellaneous slag in cross gate 30 floating to the top of cross gate 30, avoids flowing into the influence casting quality of passageway piece 40.
Further, cross gate extension 31 is provided with 30 end of cross gate, the bottom of cross gate extension 31 is water
Flat-shaped, the top of cross gate extension 31 is ramp-like to dip down, from the initiating terminal of cross gate extension 31 to cross gate extension
31 ends, the cross-sectional area of cross gate extension 31 taper into, to prevent molten metal flow to 31 end of cross gate extension from going out
Now turn back situation, slag trap 32 is arranged on the bottom of 31 end of cross gate extension, to be guided most by cross gate extension 31
Slag inclusion in the molten metal just flowed into cross gate 30 is guided into slag trap 32.
Since when pouring into a mould large scale casting, the metal liquid measure flowed into sprue 20 and cross gate 30 is very big, therefore
The flow velocity for the molten metal for flowing into cavity, further, the ingate are adjusted by setting ingate in 40 end of passageway piece
50 include entrance 51 and outlet section 52, and the entrance 51 is isometrical L-type passage, and outlet section 52 is vertical variable diameter passage, is gone out
The cross-sectional area of mouth section 52 gradually increases from lower end to upper end, the minimum sectional area of outlet section 52 and the sectional area phase of entrance 51
Deng molten metal is flowed slowly into from the entrance 51 of ingate 50, the gradually increase again of the area of section of outlet, can pass through molten metal
Outlet section 52 is smoothly flowed into cavity, so that Filling Processes of Castings is steady, is avoided producing vortex and is splashed.
Further, the entrance 51 of ingate is arranged on the position of the 1/3-2/3 of passageway leaf length, is made with providing distance
Miscellaneous slag in molten metal in the piece of passageway and is provided with the passageway tilted down in 40 end of passageway piece floating to the top of passageway piece
Piece extension 41, to collect the miscellaneous slag of the molten metal flowed into passageway piece 40.
Further, the outlet section 52 of ingate 50 is inverted cone channel, and the top of outlet section 52 is connected with cavity, outlet
The bore on the top of section 52 is more than the bore of bottom so that molten metal from outlet section 52 fill type upwards when flow velocity it is slack-off, play steady
Stream avoids the effect of slag, and tip section area and the bottom sectional area ratio of outlet section 52 are 6:1~10:1.
Further, the ratio between area of section of sprue 20, cross gate 30, passageway piece 40 and ingate 50=1:1.5:
0.9:0.8, the sectional area of ingate 50 is minimum, can ensure that the metal flow velocity for flowing into ingate 50 is small, by choked flow section
Be arranged on ingate 50, so as to fulfill being rapidly filled with for cross gate 30, effectively avoid flowing into passageway piece 40 molten metal gas enclosure and
It is mingled with.
Embodiment 1：
A kind of closing-unchoked running system 10, including sprue 20, cross gate 30, several passageway pieces 40, ingate 50,
The sprue 20 is cylindric, lower end and 30 vertical connection of cross gate of sprue 20, with by sprue 20 by molten metal
Cross gate 30 is drained to, sprue base 21 is set in 20 bottom of sprue, to mitigate impact of the molten metal to 20 bottom of sprue,
Bubble emersion in the molten metal that sprue 20 is flowed down at the same time, passageway piece 40 is arranged on the side wall of cross gate 30, and passageway
One end of piece 40 is connected with cross gate 30, and the other end of passageway piece 40 is connected with ingate 50, and ingate 50 is arranged on passageway piece
40 bottoms, ingate 50 are connected with cavity, the molten metal in cross gate 30 is drained to ingate 50 by passageway piece 40, into
And molten metal is guided to cavity by ingate 50 and is poured into a mould, ingate 50 can not also be set when pouring into a mould light casting, directly
Connect passageway piece 40 to guide molten metal to cavity, and 30 end of cross gate is provided with slag trap 32, to collect cross gate 30
The miscellaneous slag of interior outflow, 30 section of cross gate are narrow high type structure, depth-width ratio >=2 of cross gate:1, the passageway piece 40 is
Wide thin type structure, the ratio of width to height >=4 of passageway piece:1, so that the molten metal in cross gate 30 is flowed slowly into type by passageway piece 40
In chamber, avoid molten metal splashing and produce vortex, the position that passageway piece 40 is connected with cross gate 30 is less than the height of cross gate 30
1/2 so that the scum silica frost of molten metal in cross gate is highly higher than the height of passageway piece 40, and then avoid scum silica frost from flowing into passageway piece
In 40, the quantity of passageway piece 40 is set according to the size of casting, and the passageway piece 40 nearest apart from sprue 20 is first mistake
Road piece 40, the passageway piece 40 farthest apart from sprue 20 are last passageway piece 40, and first passageway piece 40 is from sprue 20
Distance be equal to 2 times of 20 height of sprue so that the miscellaneous slag in molten metal floats without flowing into passageway piece 40, last mistake
Road piece 40 is also equal to 2 times of 20 height of sprue with a distance from 30 end of cross gate, so that the miscellaneous slag in cross gate 30 is poured through horizontal
30 end of road is discharged into slag trap 32, and without entering passageway piece 40, the interval for being arranged on the passageway piece 40 of centre is more than or equal to
2 times of 40 width of passageway piece, make the miscellaneous slag in cross gate 30 floating to cross gate 30 to provide enough distances for cross gate 30
Top, avoids flowing into the influence casting quality of passageway piece 40.
Further, cross gate extension 31 is provided with 30 end of cross gate, the bottom of cross gate extension 31 is water
Flat-shaped, the top of cross gate extension 31 is ramp-like to dip down, from the initiating terminal of cross gate extension 31 to cross gate extension
31 ends, the cross-sectional area of cross gate extension 31 taper into, to prevent molten metal flow to 31 end of cross gate extension from going out
Now turn back situation, slag trap 32 is arranged on the bottom of 31 end of cross gate extension, to be guided most by cross gate extension 31
Slag inclusion in the molten metal just flowed into cross gate 30 is guided into slag trap 32.
Since when pouring into a mould large scale casting, the metal liquid measure flowed into sprue 20 and cross gate 30 is very big, therefore
The flow velocity for the molten metal for flowing into cavity, further, the ingate are adjusted by setting ingate in 40 end of passageway piece
50 include entrance 51 and outlet section 52, and the entrance 51 is isometrical L-type passage, and outlet section 52 is vertical variable diameter passage, is gone out
The cross-sectional area of mouth section 52 gradually increases from lower end to upper end, the minimum sectional area of outlet section 52 and the sectional area phase of entrance 51
Deng molten metal is flowed slowly into from the entrance 51 of ingate 50, the gradually increase again of the area of section of outlet, can pass through molten metal
Outlet section 52 is smoothly flowed into cavity, so that Filling Processes of Castings is steady, is avoided producing vortex and is splashed.
Further, the entrance 51 of ingate is arranged on 1/3 position of passageway leaf length, makes passageway to provide distance
Miscellaneous slag in molten metal in piece and is provided with the passageway piece tilted down in 40 end of passageway piece and prolongs floating to the top of passageway piece
Long section 41, to collect the miscellaneous slag of the molten metal flowed into passageway piece 40.
Further, the outlet section 52 of ingate 50 is inverted cone channel, and the top of outlet section 52 is connected with cavity, outlet
The bore on the top of section 52 is more than the bore of bottom so that molten metal from outlet section 52 fill type upwards when flow velocity it is slack-off, play steady
Stream avoids the effect of slag, and tip section area and the bottom sectional area ratio of outlet section 52 are 6:1.
Further, the ratio between area of section of sprue 20, cross gate 30, passageway piece 40 and ingate 50=1:1.5:
0.9:0.8, the sectional area of ingate 50 is minimum, can ensure that the metal flow velocity for flowing into ingate 50 is small, by choked flow section
Be arranged on ingate 50, so as to fulfill being rapidly filled with for cross gate 30, effectively avoid flowing into passageway piece 40 molten metal gas enclosure and
It is mingled with.
Embodiment 2：
A kind of closing-unchoked running system 10, including sprue 20, cross gate 30, several passageway pieces 40, ingate 50,
The sprue 20 is cylindric, lower end and 30 vertical connection of cross gate of sprue 20, with by sprue 20 by molten metal
Cross gate 30 is drained to, sprue base 21 is set in 20 bottom of sprue, to mitigate impact of the molten metal to 20 bottom of sprue,
Bubble emersion in the molten metal that sprue 20 is flowed down at the same time, passageway piece 40 is arranged on the side wall of cross gate 30, and passageway
One end of piece 40 is connected with cross gate 30, and the other end of passageway piece 40 is connected with ingate 50, and ingate 50 is arranged on passageway piece
40 bottoms, one end are connected with passageway piece 40, and the other end leads to cavity, to be drawn the molten metal in cross gate 30 by passageway piece 40
Ingate 50 is flow to, and then molten metal is guided to cavity by ingate 50 and is poured into a mould, can also when pouring into a mould light casting
Ingate 50 is not set, is directly guided molten metal to cavity by passageway piece 40, and 30 end of cross gate is provided with slag trap 32,
To collect the miscellaneous slag of outflow in cross gate 30,30 section of cross gate is narrow high type structure, its depth-width ratio >=2:1, the mistake
Road piece 40 is wide thin type structure, its ratio of width to height >=4:1 so that molten metal in cross gate 30 by passageway piece 40 flow slowly into
In cavity, avoid molten metal splashing and produce vortex, the position that passageway piece 40 is connected with cross gate 30 is less than the height of cross gate 30
The 2/3 of degree, so that the scum silica frost of the molten metal in cross gate is highly higher than the height of passageway piece 40, and then avoids scum silica frost from flowing into passageway
In piece 40, the quantity of passageway piece 40 is set according to the size of casting, and the passageway piece 40 nearest from sprue 20 is first mistake
Road piece 40, the passageway piece 40 farthest from sprue 20 are last passageway piece 40, and first passageway piece 40 is from sprue 20
Distance is equal to 2 times of 20 height of sprue, so that the miscellaneous slag in molten metal floats without flowing into passageway piece 40, last passageway
Piece 40 is also equal to 2 times of 20 height of sprue with a distance from 30 end of cross gate, so that the miscellaneous slag in cross gate 30 is through cross gate
30 ends are discharged into slag trap 32, and without entering passageway piece 40, the interval for being arranged on the passageway piece 40 of centre was more than or equal to
2 times of 40 width of road piece, to provide the top that enough distances make the miscellaneous slag in cross gate 30 floating to cross gate 30 for cross gate 30
Portion, avoids flowing into passageway piece 40, so as to influence casting quality.
Further, cross gate extension 31 is provided with 30 end of cross gate, the bottom of cross gate extension 31 is water
Flat-shaped, the top of cross gate extension 31 is ramp-like to dip down, from the initiating terminal of cross gate extension 31 to cross gate extension
31 ends, the cross-sectional area of cross gate extension 31 taper into, to prevent molten metal flow to 31 end of cross gate extension from going out
Now turn back situation, slag trap 32 is arranged on the bottom of 31 end of cross gate extension, to be guided most by cross gate extension 31
Slag inclusion in the molten metal just flowed into cross gate 30 is guided into slag trap 32.
Since when pouring into a mould large scale casting, the metal liquid measure flowed into sprue 20 and cross gate 30 is very big, therefore
The flow velocity for the molten metal for flowing into cavity, further, the ingate are adjusted by setting ingate in 40 end of passageway piece
50 include entrance 51 and outlet section 52, and the entrance 51 is isometrical right-angle structure, and outlet section 52 is variable-diameter structure, outlet section
52 cross-sectional area gradually increases, and the minimum sectional area of outlet section 52 is equal with the sectional area of entrance 51, and molten metal pours in
The entrance 51 in road 50 flows slowly into, and the area of section gradually increase again of outlet, can make molten metal stable by outlet section 52
Flow into cavity, so that Filling Processes of Castings is steady, avoids producing vortex and splash.
Further, the entrance 51 of ingate is arranged on 2/3 position of passageway leaf length, and in 40 end of passageway piece
The passageway piece extension 41 tilted down is provided with, to collect the miscellaneous slag of the molten metal flowed into passageway piece 40.
Further, the outlet section 52 of ingate 50 is inverted cone channel, and the top of outlet section 52 is connected with cavity, outlet
The bore on the top of section 52 is more than the bore of bottom so that molten metal from outlet section 52 fill type upwards when flow velocity it is slack-off, play steady
Stream avoids the effect of slag, and tip section area and the bottom sectional area ratio of outlet section 52 are 10:1.
Further, the ratio between area of section of sprue 20, cross gate 30, passageway piece 40 and ingate 50=1:3:1:
0.9, the sectional area of ingate 50 is minimum, can ensure that the metal flow velocity for flowing into ingate 50 is small, choked flow section is set
In ingate 50, so as to fulfill being rapidly filled with for cross gate 30, effectively avoid flowing into the molten metal gas enclosure of passageway piece 40 and be mingled with.
Embodiment 3：
A kind of closing-unchoked running system 10, including sprue 20, cross gate 30, several passageway pieces 40, ingate 50,
The sprue 20 is cylindric, lower end and 30 vertical connection of cross gate of sprue 20, with by sprue 20 by molten metal
Cross gate 30 is drained to, sprue base 21 is set in 20 bottom of sprue, to mitigate impact of the molten metal to 20 bottom of sprue,
Bubble emersion in the molten metal that sprue 20 is flowed down at the same time, passageway piece 40 is arranged on the side wall of cross gate 30, and passageway
One end of piece 40 is connected with cross gate 30, and the other end of passageway piece 40 is connected with ingate 50, and ingate 50 is arranged on passageway piece
40 bottoms, one end are connected with passageway piece 40, and the other end leads to cavity, to be drawn the molten metal in cross gate 30 by passageway piece 40
Ingate 50 is flow to, and then molten metal is guided to cavity by ingate 50 and is poured into a mould, can also when pouring into a mould light casting
Ingate 50 is not set, is directly guided molten metal to cavity by passageway piece 40, and 30 end of cross gate is provided with slag trap 32,
To collect the miscellaneous slag of outflow in cross gate 30,30 section of cross gate is narrow high type structure, its depth-width ratio >=2:1, the mistake
Road piece 40 is wide thin type structure, its ratio of width to height >=4:1 so that molten metal in cross gate 30 by passageway piece 40 flow slowly into
In cavity, avoid molten metal splashing and produce vortex, the position that passageway piece 40 is connected with cross gate 30 is less than the height of cross gate 30
The 3/5 of degree, so that the scum silica frost of the molten metal in cross gate is highly higher than the height of passageway piece 40, and then avoids scum silica frost from flowing into passageway
In piece 40, the quantity of passageway piece 40 is set according to the size of casting, and the passageway piece 40 nearest from sprue 20 is first mistake
Road piece 40, the passageway piece 40 farthest from sprue 20 are last passageway piece 40, and first passageway piece 40 is from sprue 20
Distance is equal to 2 times of 20 height of sprue, so that the miscellaneous slag in molten metal floats without flowing into passageway piece 40, last passageway
Piece 40 is also equal to 2 times of 20 height of sprue with a distance from 30 end of cross gate, so that the miscellaneous slag in cross gate 30 is through cross gate
30 ends are discharged into slag trap 32, and without entering passageway piece 40, the interval for being arranged on the passageway piece 40 of centre was more than or equal to
2 times of 40 width of road piece, to provide the top that enough distances make the miscellaneous slag in cross gate 30 floating to cross gate 30 for cross gate 30
Portion, avoids flowing into passageway piece 40, so as to influence casting quality.
Further, cross gate extension 31 is provided with 30 end of cross gate, the bottom of cross gate extension 31 is water
Flat-shaped, the top of cross gate extension 31 is ramp-like to dip down, from the initiating terminal of cross gate extension 31 to cross gate extension
31 ends, the cross-sectional area of cross gate extension 31 taper into, to prevent molten metal flow to 31 end of cross gate extension from going out
Now turn back situation, slag trap 32 is arranged on the bottom of 31 end of cross gate extension, to be guided most by cross gate extension 31
Slag inclusion in the molten metal just flowed into cross gate 30 is guided into slag trap 32.
Since when pouring into a mould large scale casting, the metal liquid measure flowed into sprue 20 and cross gate 30 is very big, therefore
The flow velocity for the molten metal for flowing into cavity, further, the ingate are adjusted by setting ingate in 40 end of passageway piece
50 include entrance 51 and outlet section 52, and the entrance 51 is isometrical right-angle structure, and outlet section 52 is variable-diameter structure, outlet section
52 cross-sectional area gradually increases, and the minimum sectional area of outlet section 52 is equal with the sectional area of entrance 51, and molten metal pours in
The entrance 51 in road 50 flows slowly into, and the area of section gradually increase again of outlet, can make molten metal stable by outlet section 52
Flow into cavity, so that Filling Processes of Castings is steady, avoids producing vortex and splash.
Further, the entrance 51 of ingate is arranged on 1/2 position of passageway leaf length, and in 40 end of passageway piece
The passageway piece extension 41 tilted down is provided with, to collect the miscellaneous slag of the molten metal flowed into passageway piece 40.
Further, the outlet section 52 of ingate 50 is inverted cone channel, and the top of outlet section 52 is connected with cavity, outlet
The bore on the top of section 52 is more than the bore of bottom so that molten metal from outlet section 52 fill type upwards when flow velocity it is slack-off, play steady
Stream avoids the effect of slag, and tip section area and the bottom sectional area ratio of outlet section 52 are 8:1.
Further, the ratio between area of section of sprue 20, cross gate 30, passageway piece 40 and ingate 50=1:2:0.95:
0.85, the sectional area of ingate 50 is minimum, can ensure that the metal flow velocity for flowing into ingate 50 is small, choked flow section is set
In ingate 50, so as to fulfill being rapidly filled with for cross gate 30, effectively avoid flowing into the molten metal gas enclosure of passageway piece 40 and be mingled with.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
Enclose, one of ordinary skill in the art will appreciate that realize all or part of flow of above-described embodiment, and will according to right of the present invention
Made equivalent variations are sought, still falls within and invents covered scope.
Claims (6)
- A kind of 1. closing-unchoked running system, it is characterised in that：Including sprue, cross gate, several passageway pieces, interior pour Road, the sprue are cylindric, and lower end and the cross gate vertical connection of sprue, sprue base is set in sprue bottom, Passageway piece is arranged on the side wall of cross gate, and one end of passageway piece is connected with cross gate, the other end and ingate of passageway piece Connection, ingate are arranged on passageway piece bottom, and ingate is connected with cavity, and slag trap, the horizontal stroke are provided with cross gate end Running channel section is narrow high type structure, depth-width ratio >=2 of cross gate:1, the passageway piece is wide thin type structure, and the width of passageway piece is high Than >=4:1, so that the molten metal in cross gate is flowed slowly into cavity by passageway piece, avoid molten metal splashing and produce whirlpool Stream, the position that passageway piece is connected with cross gate are less than the 1/2-2/3 of the height of cross gate, so that the molten metal in cross gate is floating Slag is highly higher than the height of passageway piece, and then avoids scum silica frost from flowing into the piece of passageway, the quantity of passageway piece according to casting size and Set, the passageway piece nearest apart from sprue is first passageway piece, and the passageway piece farthest apart from sprue is last mistake Road piece, first passageway piece are equal to 2 times of sprue height with a distance from sprue so that the miscellaneous slag in molten metal float without Passageway piece is flowed into, last passageway piece is also equal to 2 times of sprue height with a distance from cross gate end, so that in cross gate Miscellaneous slag be discharged into through cross gate end into slag trap, without entering passageway piece, the interval of passageway piece for being arranged on centre is more than Equal to 2 times of passageway piece width, to provide the top that enough distances make the miscellaneous slag in cross gate floating to cross gate for cross gate, Avoid flowing into passageway piece influence casting quality.
- 2. closing-unchoked running system as claimed in claim 1, it is characterised in that：Cross gate end is provided with horizontal pour Road extension, the bottom of cross gate extension is horizontal, and the top of cross gate extension is ramp-like to dip down, and prolongs from cross gate The initiating terminal of long section to cross gate extension end, the cross-sectional area of cross gate extension tapers into, to prevent molten metal stream There is the situation of turning back to cross gate extension end, slag trap is arranged on the bottom of cross gate extension end, to be poured by horizontal The slag inclusion that road extension guiding is initially flowed into the molten metal to cross gate is guided into slag trap.
- 3. closing-unchoked running system as claimed in claim 2, it is characterised in that：The ingate include entrance and Outlet section, the entrance are isometrical L-type passage, and outlet section is vertical variable diameter passage, the cross-sectional area of outlet section from lower end to Upper end gradually increases, and the minimum sectional area of outlet section is equal with the sectional area of entrance, so that molten metal is slow by ingate Flow into cavity, avoid molten metal from producing vortex when flowing into cavity and splash.
- 4. closing-unchoked running system as claimed in claim 3, it is characterised in that：The entrance of ingate was arranged on The position of the 1/3-2/3 of road leaf length, and the passageway piece extension tilted down is provided with passageway piece end, flowed into collecting The miscellaneous slag of molten metal in passageway piece.
- 5. closing-unchoked running system as claimed in claim 4, it is characterised in that：The outlet section of ingate is back taper Passage, the top of outlet section are connected with cavity, and the bore on the top of outlet section is more than the bore of bottom, so that molten metal is from outlet Flow velocity is slack-off when section fills type upwards, plays the role of current stabilization and avoids slag, tip section area and the bottom sectional area of outlet section Than for 6:1~10:1.
- 6. closing-unchoked running system as claimed in claim 5, it is characterised in that：Sprue, cross gate, passageway piece and The ratio between area of section of ingate=1:1.5~3:0.9~1:0.8 ~ 0.9, choked flow section is arranged on ingate, so as to fulfill horizontal stroke Running channel is rapidly filled with, and is effectively avoided flowing into the molten metal gas enclosure of passageway piece and is mingled with.
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| CN201711188523.3A CN107931529B (en) | 2017-11-24 | 2017-11-24 | Closing-unchoked running system |
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| CN201711188523.3A CN107931529B (en) | 2017-11-24 | 2017-11-24 | Closing-unchoked running system |
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| CN107931529B (en) | 2019-05-17 |
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