CN110548857B - Quick vacuum upper suction casting mould - Google Patents
Quick vacuum upper suction casting mould Download PDFInfo
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- CN110548857B CN110548857B CN201910907976.XA CN201910907976A CN110548857B CN 110548857 B CN110548857 B CN 110548857B CN 201910907976 A CN201910907976 A CN 201910907976A CN 110548857 B CN110548857 B CN 110548857B
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- vertical pipe
- transition groove
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- mold
- flow channel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
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Abstract
The invention discloses a quick vacuum updraught casting mold, which comprises a mold tree and a mold, wherein the mold tree comprises a vertical pipe which is vertically communicated, the vertical pipe is obliquely connected with a plurality of mold cavities, the mold cavities are communicated with the vertical pipe through liquid flowing channels, and the height of the liquid flowing channels is gradually reduced along the radial outward direction of the vertical pipe; the transition groove is sunken in the inner wall of the vertical pipe, a transition groove is intersected above each liquid flow channel, the depth of the sunken part of each transition groove is gradually deeper along the direction from top to bottom, and the plane of the intersection line of the transition groove and the liquid flow channel is vertical to the axis of the liquid flow channel; the sealed shell wraps up the mould tree, and the mould tree possesses the intubate that just communicates with the external world with the sealed shell assembly, and the sealed shell is connected with vacuum generator. The transition groove specially designed by the invention can carry away the metal liquid partially retained on the liquid flowing channel, meets the size requirement after solidification, reduces the subsequent trimming amount and achieves the effect of quick processing.
Description
Technical Field
The invention relates to the field of casting equipment, in particular to a quick vacuum upper suction casting mold.
Background
Vacuum suction casting is a casting method in which a vacuum is created in a cavity, and molten metal is sucked into the cavity from bottom to top to be solidified. The technological principle of vacuum suction casting is that the investment shell mould is placed in a sealed chamber, the sealed chamber descends, a sprue is immersed in liquid metal, then a vacuum pump is started to vacuumize the sealed chamber, and liquid is simultaneously suction cast. And after the casting in the shell is solidified, the vacuum state is released, the residual metal liquid in the pouring channel flows back to the melting furnace, and the vacuum suction casting is obtained through sand removal. A vertical main pipeline for molten metal to flow is arranged in the shell certainly, and when vacuum is released finally, the molten metal in the main pipeline almost flows back due to self weight, but the molten metal is remained at the junction of the main pipeline and the die cavity inevitably, so that the size precision of a solidified workpiece is influenced.
Disclosure of Invention
The invention aims to solve the problem of providing a quick-forming vacuum updraught casting mold, wherein a specially designed transition groove can carry away locally retained molten metal on a liquid flowing channel, the solidified molten metal meets the size requirement, the subsequent trimming amount is reduced, and the effect of quick-forming processing is achieved.
In order to solve the problems, the invention provides a quick vacuum updraught casting mould, and in order to achieve the purposes, the technical scheme adopted by the invention for solving the technical problems is as follows:
a rapid-build vacuum updraught casting mold comprising: the mold tree comprises vertical tubes which are vertically communicated, a plurality of mold cavities are obliquely connected to the vertical tubes, the mold cavities are communicated with the vertical tubes through liquid flowing channels, and the height of the liquid flowing channels is gradually reduced along the radial outward direction of the vertical tubes; the transition groove is sunken in the inner wall of the vertical pipe, a transition groove is intersected above each liquid flow channel, the depth of the sunken part of each transition groove is gradually deeper along the direction from top to bottom, and the plane of the intersection line of the transition groove and the liquid flow channel is vertical to the axis of the liquid flow channel; the sealed shell wraps up the mould tree, and the mould tree possesses the intubate that just communicates with the external world with the sealed shell assembly, and the sealed shell is connected with vacuum generator.
The beneficial effect of adopting above-mentioned technical scheme is: the length direction of the die cavity is parallel to the liquid flow channel, and forms an acute included angle with the plumb line, namely the axis of the vertical pipe, the junction of the liquid flow channel and the vertical pipe is the highest position of the liquid flow channel, when the vacuum generator operates, the metal liquid is filled into each die cavity, the liquid flow channel and the vertical pipe from bottom to top, the metal liquid in the vertical pipe automatically falls back firstly after pressure relief, the metal liquid in the die cavity and the liquid flow channel continues to be reserved under the action of gravity, and the shape of the liquid flow channel is a member piece inherent in a workpiece after the die cavity is formed. At the intersection of the transition groove, the liquid flow channel and the vertical pipe, the transition groove damages the upper end of the junction of the liquid flow channel and the vertical pipe, otherwise, if the transition groove is not arranged, the junction of the liquid flow channel on the vertical pipe is oblique, and only a beveled end can be formed after forming. The liquid level opening part of the liquid flow channel is basically flush, and then the tail part of the cooled and formed workpiece is also straight. The workpieces corresponding to the solidified flow channel ports basically meet the size requirement, and cannot become connecting ribs for connecting the workpieces. The subsequent trimming workload is reduced, and the effect of quick processing is achieved.
As a further improvement of the invention, the cross sections of the vertical pipe and the liquid flow channel are circular, the transition groove is a concave curved surface, and the boundary line of the transition groove and the inner wall of the vertical pipe is a parabola.
The beneficial effect of adopting above-mentioned technical scheme is: vertical pipe, flow liquid way, transition groove are similar respectively with the crossing effect of cylinder chamber recess, and the parabola makes the juncture of transition groove and vertical pipe more blunt, also can not be detained the metal liquid.
As a further improvement of the invention, the included angle between the self axis of the fluid channel and the self axis of the vertical pipe is 80-85 degrees, and the included angle between the section line of the transition groove and the self axis of the vertical pipe is 1-10 degrees on the vertical symmetrical longitudinal section of the fluid channel.
The beneficial effect of adopting above-mentioned technical scheme is: the angle selection ensures that the molten metal in the die cavity can not flow back, the depth change of the transition groove is relatively slow, and the bottom of the transition groove is basically close to the vertical direction, so that the adhesive force between the transition groove and the molten metal is very low, and the molten metal is easy to fall back.
As a further improvement of the invention, on the vertical symmetrical longitudinal section of the flow channel, the included angle between the section line of the transition groove and the self axis of the vertical pipe is always smaller than the complementary angle between the self axis of the flow channel and the self axis of the vertical pipe.
The beneficial effect of adopting above-mentioned technical scheme is: further guarantee to cross the degree of depth change of aqueduct relatively slowly, the bottom of crossing the aqueduct is then close more and vertical, and the self axis of flowing liquid way is then close and level relatively not so for only can take away the partial molten metal of flowing liquid way port when the molten metal falls back on flowing liquid way, and can excessively take away the molten metal of flowing liquid way depths.
As a further improvement of the invention, the vertical pipes are connected with the die cavities at different heights, only one transition groove is arranged on the same horizontal plane in each vertical pipe, and only one transition groove is arranged on the same bus of each vertical pipe.
The beneficial effect of adopting above-mentioned technical scheme is: the die cavities are basically spirally arranged on the vertical pipe, and the arrangement of the transition grooves can avoid that the smoothness of the inner wall of the vertical pipe is damaged due to the fact that the transition grooves are high in density on a certain bus and a certain horizontal height of the inner wall of the vertical pipe, so that molten metal is obviously retained at the position.
As a still further improvement of the invention, the height of the highest position in the single mold cavity is not higher than the height of the highest position of the connected flow passage.
The beneficial effect of adopting above-mentioned technical scheme is: the top of the die cavity can be fully filled with the molten metal, and no vacuole is formed.
As a further improvement of the invention, the top of the vertical pipe is communicated with a funnel which is communicated up and down, and the diameter of the funnel is gradually reduced along the direction from top to bottom.
The beneficial effect of adopting above-mentioned technical scheme is: the top funnel provides a larger receiving space and the width of the funnel is larger the further up. The funnel can temporarily hold molten metal, providing a wide range of control lines. The time and the volume of the molten metal entering the mold tree do not need to be accurately mastered during vacuumizing, and the operation difficulty is reduced. No matter how little the metal liquid is temporarily stored in the funnel, the metal liquid flows back to the containing pool along with the vertical pipe. The upper opening of the funnel is the opening above the whole mold tree, and vacuum negative pressure can act on each mold cavity. Meanwhile, the molten metal overflows in a large-capacity mode through the funnel.
As a further improvement of the invention, the sealing shell comprises an upper sealing shell and a lower sealing shell which are sequentially sealed and attached up and down, the upper sealing shell is provided with an air exhaust hole, the air exhaust hole is connected with a vacuum generator, and the bottom of the upper sealing shell and the top of the lower sealing shell are respectively provided with a flange which extends outwards and radially.
The beneficial effect of adopting above-mentioned technical scheme is: the upper sealing shell and the lower sealing shell which can be opened and closed improve the space path for the mold tree to enter the sealing shells, the flange improves the contact area between the lower sealing shell and the upper sealing shell, and the integral air tightness of the sealing shells is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a cross-sectional view of a capsule according to one embodiment of the present invention.
FIG. 2 is a cross-sectional view of a mold tree in accordance with one embodiment of the present invention.
FIG. 3 is an enlarged view of a portion of one embodiment of the present invention at A.
Fig. 4 is a schematic diagram of an application of an embodiment of the present invention.
1-upper sealed shell; 2-lower sealing shell; 3-air extraction holes; 4-through pipe; 5-a flange; 6-intubation; 7-an expansion section; 8-a mold tree; 9-a mold cavity; 10-a funnel; 11-a fluid channel; 12-a transition groove; 13-a vertical tube; 14-a holding tank; 15-molten metal.
Detailed Description
The present invention will be further described in detail with reference to the following specific examples:
to achieve the object of the present invention, a rapid vacuum updraught casting mold comprising: the mold tree 8 comprises vertical tubes 13 which are vertically communicated, the vertical tubes 13 are obliquely connected with a plurality of mold cavities 9, the mold cavities 9 are communicated with the vertical tubes 13 through liquid flow channels 11, and the height of the liquid flow channels 11 is gradually reduced along the radial outward direction of the vertical tubes 13; the transition groove 12 is sunken in the inner wall of the vertical pipe 13, the transition groove 12 is intersected above each liquid flowing channel 11, the sunken depth of each transition groove 12 is gradually deepened along the direction from top to bottom, and the plane where the intersection line of the transition groove 12 and the liquid flowing channel 11 is located is vertical to the axis of the liquid flowing channel 11; sealed shell, including 8 parcels of mould tree, mould tree 8 possesses with the assembly of sealed shell and with the intubate 6 of external intercommunication, and sealed shell is connected with vacuum generator.
The beneficial effect of adopting above-mentioned technical scheme is: the length direction of the die cavity is parallel to the liquid flow channel, and forms an acute included angle with the plumb line, namely the axis of the vertical pipe, the junction of the liquid flow channel and the vertical pipe is the highest position of the liquid flow channel, when the vacuum generator operates, the metal liquid is filled into each die cavity, the liquid flow channel and the vertical pipe from bottom to top, the metal liquid in the vertical pipe automatically falls back firstly after pressure relief, the metal liquid in the die cavity and the liquid flow channel continues to be reserved under the action of gravity, and the shape of the liquid flow channel is a member piece inherent in a workpiece after the die cavity is formed. At the intersection of the transition groove, the liquid flow channel and the vertical pipe, the transition groove damages the upper end of the junction of the liquid flow channel and the vertical pipe, otherwise, if the transition groove is not arranged, the junction of the liquid flow channel on the vertical pipe is oblique, and only a beveled end can be formed after forming. The liquid level opening part of the liquid flow channel is basically flush, and then the tail part of the cooled and formed workpiece is also straight. The workpieces corresponding to the solidified flow channel ports basically meet the size requirement, and cannot become connecting ribs for connecting the workpieces. The subsequent trimming workload is reduced, and the effect of quick processing is achieved.
In other embodiments of the present invention, the cross-sections of the vertical pipe 13 and the fluid passage 11 are circular, the transition groove 12 is a concave curved surface, and the boundary line between the transition groove 12 and the inner wall of the vertical pipe 13 is a parabola.
The beneficial effect of adopting above-mentioned technical scheme is: vertical pipe, flow liquid way, transition groove are similar respectively with the crossing effect of cylinder chamber recess, and the parabola makes the juncture of transition groove and vertical pipe more blunt, also can not be detained the metal liquid.
In other embodiments of the invention, the angle between the axis of the flow channel 11 and the axis of the vertical pipe is in the range of 80 ° to 85 °, and the angle between the section line of the transition groove 12 and the axis of the vertical pipe 13 is in the range of 1 ° to 10 ° in the vertical symmetrical longitudinal section of the flow channel 11.
The beneficial effect of adopting above-mentioned technical scheme is: the angle selection ensures that the molten metal in the die cavity can not flow back, the depth change of the transition groove is relatively slow, and the bottom of the transition groove is basically close to the vertical direction, so that the adhesive force between the transition groove and the molten metal is very low, and the molten metal is easy to fall back.
In other embodiments of the present invention, on the vertical symmetrical longitudinal section of the flow channel 11, the included angle between the section line of the transition groove 12 and the self axis of the vertical pipe 13 is always smaller than the complementary angle between the self axis of the flow channel 11 and the self axis of the vertical pipe 13.
The beneficial effect of adopting above-mentioned technical scheme is: further guarantee to cross the degree of depth change of aqueduct relatively slowly, the bottom of crossing the aqueduct is then close more and vertical, and the self axis of flowing liquid way is then close and level relatively not so for only can take away the partial molten metal of flowing liquid way port when the molten metal falls back on flowing liquid way, and can excessively take away the molten metal of flowing liquid way depths.
In other embodiments of the invention, not shown in the drawings, the vertical pipes 13 are connected with the mold cavities 9 at different heights, only one transition groove 12 is arranged on the same horizontal plane in each vertical pipe 13, and only one transition groove 12 is arranged on the same bus of each vertical pipe 13.
The beneficial effect of adopting above-mentioned technical scheme is: the die cavities are basically spirally arranged on the vertical pipe, and the arrangement of the transition grooves can avoid that the smoothness of the inner wall of the vertical pipe is damaged due to the fact that the transition grooves are high in density on a certain bus and a certain horizontal height of the inner wall of the vertical pipe, so that molten metal is obviously retained at the position.
In other embodiments of the invention, the height of the highest point in the single mould cavity 9 is not higher than the height of the highest point of the connected fluid passage 11.
The beneficial effect of adopting above-mentioned technical scheme is: the top of the die cavity can be fully filled with the molten metal, and no vacuole is formed.
In other embodiments of the present invention, the top of the vertical tube 13 is connected to a funnel 10, the funnel 10 is vertically through, and the diameter of the funnel 10 decreases from top to bottom.
The beneficial effect of adopting above-mentioned technical scheme is: the top funnel provides a larger receiving space and the width of the funnel is larger the further up. The funnel can temporarily hold molten metal, providing a wide range of control lines. The time and the volume of the molten metal entering the mold tree do not need to be accurately mastered during vacuumizing, and the operation difficulty is reduced. No matter how little the metal liquid is temporarily stored in the funnel, the metal liquid flows back to the containing pool along with the vertical pipe. The upper opening of the funnel is the opening above the whole mold tree, and vacuum negative pressure can act on each mold cavity. Meanwhile, the molten metal overflows in a large-capacity mode through the funnel.
In other embodiments of the present invention, the sealed shell includes an upper sealed shell 1 and a lower sealed shell 2 which are sequentially sealed and attached up and down, the upper sealed shell 1 has an air extraction hole 3, the air extraction hole 3 is connected with a vacuum generator, and the bottom of the upper sealed shell 1 and the top of the lower sealed shell 2 are both provided with flanges 5 which extend radially outward.
The bottom of the lower sealing shell 2 is provided with a through pipe 4 which is vertically penetrated, and the inner wall of the through pipe 4 is assembled with the outer wall of the insertion pipe 6 in a sealing way. An expansion section 7 which expands radially is arranged above the insertion tube 6, and the outer diameter of the expansion section 7 is larger than the inner diameter of the through tube 4. The outer wall at the interface of the expansion section 7 and the insertion tube 6 is transited by an inner fillet.
When in use, as shown in fig. 4, a containing pool 14 is arranged below the lower sealing shell 2, the containing pool 14 is internally provided with molten metal 15, the bottom of the lower sealing shell 2 is submerged under the liquid level of the molten metal 15, the vacuum generator works, the molten metal 15 enters from the vertical pipe 13 and fills the die cavities 9.
The beneficial effect of adopting above-mentioned technical scheme is: the upper sealing shell and the lower sealing shell which can be opened and closed improve the space path for the mold tree to enter the sealing shells, the flange improves the contact area between the lower sealing shell and the upper sealing shell, and the integral air tightness of the sealing shells is ensured.
The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (7)
1. A rapid-rise vacuum updraught casting mold, comprising:
the mold tree comprises vertical tubes which are vertically communicated, a plurality of mold cavities are obliquely connected to the vertical tubes, the mold cavities are communicated with the vertical tubes through liquid flowing channels, and the height of the liquid flowing channels is gradually reduced along the radial outward direction of the vertical tubes;
the transition groove is sunken in the inner wall of the vertical pipe, a transition groove is intersected above each liquid flowing channel, the sunken depth of each transition groove is gradually deep along the direction from top to bottom, and the plane of the intersection line of the transition groove and the liquid flowing channel is vertical to the axis of the liquid flowing channel;
the mould tree is wrapped in the sealing shell, the mould tree is provided with an insertion pipe which is assembled with the sealing shell and communicated with the outside, and the sealing shell is connected with a vacuum generator;
the height of the highest position in the single mold cavity is not higher than the height of the highest position of the connected flow passage.
2. The rapid vacuum updraught casting mold of claim 1, wherein: the cross sections of the vertical pipe and the liquid flowing channel are circular, the transition groove is a concave curved surface, and the boundary line of the transition groove and the inner wall of the vertical pipe is a parabola.
3. The rapid vacuum updraught casting mold of claim 2, wherein: the included angle range of the self axis of the flow channel and the self axis of the vertical pipe is 80-85 degrees, and the included angle range of the section line of the transition groove and the self axis of the vertical pipe is 1-10 degrees on the vertical symmetrical longitudinal section of the flow channel.
4. The rapid vacuum updraught casting mold of claim 3, wherein: on the vertical symmetrical longitudinal section of the flow channel, the included angle between the section line of the transition groove and the self axis of the vertical pipe is always smaller than the complementary angle between the self axis of the flow channel and the self axis of the vertical pipe.
5. The rapid vacuum updraught casting mold of claim 1, wherein: the vertical pipes are connected with the die cavities at different heights, only one transition groove is arranged on the same horizontal plane in each vertical pipe, and only one transition groove is arranged on the same bus of each vertical pipe.
6. The rapid vacuum updraught casting mold of claim 1, wherein: the top intercommunication of vertical pipe has the funnel, the funnel link up from top to bottom, along from last direction down, the funnel diameter is gradually littleer.
7. The rapid vacuum updraught casting mold of claim 1, wherein: the sealed shell includes upper seal shell, the lower seal shell of upper and lower seal laminating in proper order, upper seal shell possesses the aspirating hole, the aspirating hole is connected vacuum generator, the bottom of upper seal shell, the top of lower seal shell all possess outside radial extension's flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910907976.XA CN110548857B (en) | 2019-09-24 | 2019-09-24 | Quick vacuum upper suction casting mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910907976.XA CN110548857B (en) | 2019-09-24 | 2019-09-24 | Quick vacuum upper suction casting mould |
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| Publication Number | Publication Date |
|---|---|
| CN110548857A CN110548857A (en) | 2019-12-10 |
| CN110548857B true CN110548857B (en) | 2021-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910907976.XA Active CN110548857B (en) | 2019-09-24 | 2019-09-24 | Quick vacuum upper suction casting mould |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4112997A (en) * | 1977-02-28 | 1978-09-12 | Hitchiner Manufacturing Co., Inc. | Metal casting |
| US4791977A (en) * | 1987-05-07 | 1988-12-20 | Metal Casting Technology, Inc. | Countergravity metal casting apparatus and process |
| JPH0357549A (en) * | 1989-07-25 | 1991-03-12 | Daido Steel Co Ltd | Pressure reduction/suction casting method |
| US5044420A (en) * | 1990-08-13 | 1991-09-03 | General Motors Corporation | Vacuum-assisted, countergravity casting apparatus and method |
| US5303762A (en) * | 1992-07-17 | 1994-04-19 | Hitchiner Manufacturing Co., Inc. | Countergravity casting apparatus and method |
| JPH09300061A (en) * | 1996-05-15 | 1997-11-25 | Hitachi Metals Ltd | Reduced pressure suction casting device and cast parts using this |
| JPH1099959A (en) * | 1996-09-26 | 1998-04-21 | Hitachi Metals Ltd | Reduced pressure suction casting device |
| CN205437044U (en) * | 2016-04-12 | 2016-08-10 | 承德荣茂铸钢有限公司 | Casting device |
| CN109719277A (en) * | 2017-10-30 | 2019-05-07 | 科华控股股份有限公司 | The anti-gravity feeding shell structure of heat resisting steel volute process for suction casting |
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2019
- 2019-09-24 CN CN201910907976.XA patent/CN110548857B/en active Active
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