CN205996168U - Large-scale impeller precision casting mold and system and large-scale impeller low pressure casting system - Google Patents

Abstract

The utility model discloses a kind of large-scale impeller precision casting mold and system and large-scale impeller low pressure casting system, upper die and lower die including corresponding setting up and down, it is provided with profile member, described profile member top is provided with to form the core of impeller inner chamber and blade in the die cavity that described upper die and lower die are formed；On described, mould is provided with the first cooling end for being cooled down to impeller internal, and the top of described upper mould is provided with multiple second cooling ends for upper mould is carried out with jet cooling, and the lower surface of described upper mould is provided with the multiple exhaust portion for being exhausted.Annular groove, venting plug is had to improve aerofluxuss in upper mould, improving foundry goods rate of cooling, plaster core bottom is conducive to bottom aluminium liquid insulation and the feeding to foundry goods using profile member for cooling ring and cooling cone.It is capable of the one piece casting program to the large-sized impeller of thin-walled, Forming Quality is good, high precision.

Description

Large-scale impeller precision casting mold and system and large-scale impeller low pressure casting system

Technical field

This utility model belongs to precision casting technology field and in particular to a kind of large-scale impeller precision casting mold and system And large-scale impeller low pressure casting system.

Background technology

Centrifugal compressor or centrifugal pump are used for providing pressurization for various flow of fluids.This compressor or centrifugal pump comprise Impeller, when the impeller is rotated, fluid axial direction enters, and then accelerates into circumference and radial direction, and high flow rate fluid enters Diffuser, exports high-pressure fluid after converted speed, to such compressor or centrifugal pump, the impeller being used is generally accurate casting Make large thin-wall impeller.

When using low-pressure casting method casting impeller, its cooling procedure needs to meet certain cooling gradient, the most preferable The state of cooling be from top to bottom, from outside to inside, bottom aluminium liquid can carry out feeding to top foundry goods, can be prevented effectively from appearance Shrinkage porosite.Existing pump vane casting mould is traditionally arranged to be upper die and lower die and core, carried out using existing casting mould large-scale thin During the casting processing of wall impeller, often due to itself mould structure unreasonable it is impossible to reach preferably from top to bottom, by outer To interior cooling order and cooling effect, the rate of cooling heterogeneity of impeller casting in whole cooling procedure, cooling degree is uneven One, the defects such as shrinkage porosite in the impeller casting of final molding；

Because the diameter dimension of large thin-wall impeller is larger, the wall of impeller is relatively thin, blade thinnest part about 1.2mm, existing Casting mould in casting large-scale impeller, the poor air permeability of mould, cause casting process aerofluxuss not smooth, casting solution toward mould Resistance can be produced during interior filling, lead to impeller casting that misrun phenomenon occurs, or in mould, gas row does not go out to melt Molten metal is choked with resentment phenomenon, makes impeller casting produce the defects such as pore, sand holes, structure property is low, affects impeller casting quality；

Because the vane thickness of large thin-wall impeller is little, the shape distortion of blade, complex structure, using existing pump vane casting When mould is cast, molding difficulty height is it is difficult to ensure dimensional accuracy and the surface roughness of impeller casting, right meeting Under the premise of the cooling of impeller casting, to large thin-wall impeller casting issuable shrinkage cavity cannot feeding further, final molding Impeller casting yield rate low, of poor quality.

And, when carrying out low pressure casting using existing pump vane casting mould, often because can not reach cold well But gradient.Generally occur that the internal structure such as blade and surface of internal cavity of impeller are brighter and cleaner, but in root of blade T-shaped thermal center portion Shrinkage porosite is more serious for position, is repeatedly improved the situation that also cannot obtain castings.And in large thin-wall pump vane casting, by it The increase of diameter dimension, mould structure size itself also increases, and is more difficult to when whole mould structure cools down meet one Fixed cooling gradient, the impeller casting of final molding cannot meet the demand of normal use.

Utility model content

The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, providing a kind of large-scale impeller hot investment casting mould Tool, this mould improves aerofluxuss by the annular groove in upper mould, venting plug, and setting cooling cone and cooling ring on upper mould, improves casting Part rate of cooling；The cooperation of core and profile member (can adopt sand mold/gypsum mould/ceramic mould) is also beneficial to bottom aluminum simultaneously Liquid insulation and the feeding to foundry goods.

A kind of large-scale impeller hot investment casting system is also provided, above-mentioned casting mould and existing casting device are cooperatively formed leaf Wheel casting system, lifts the cooling effect of pump vane casting, by ring on mould by the setting of cooling ring on mould and cooling cone The setting of groove lifts the exhaust effect of pump vane casting, by these special setting on mould structure, so that the impeller ultimately forming is cast Part high precision, quality is good, realizes the hot investment casting to impeller.

A kind of large-scale impeller low pressure casting system is also provided, mould and existing low-pressure casting apparatus is cooperatively formed impeller low Pressure casting system, lifts the cooling effect of pump vane casting, by ring on mould by the setting of cooling ring on mould and cooling cone The setting of groove lifts the exhaust effect of pump vane casting, by these special setting on mould structure, so that the impeller ultimately forming is cast Part high precision, quality is good, realizes the low pressure casting to impeller.

For achieving the above object, this utility model adopts following technical proposals：

A kind of large-scale impeller precision casting mold, including the upper die and lower die of corresponding setting up and down, described upper mould and under It is provided with profile member, described profile member top is provided with to form the core of impeller inner chamber and blade in the die cavity that mould is formed； On described, mould is provided with the first cooling end for being cooled down to impeller internal, and the top of described upper mould is provided with for upper mould Carry out multiple second cooling ends of jet cooling, the lower surface of described upper mould is provided with for entering to the gas producing in casting process Multiple exhaust portion of row aerofluxuss.It is incubated and to foundry goods beneficial to bottom aluminium liquid using core and being combined with of profile member in mould Feeding；On upper mould, the cooling ring of setting and cooling cone can be very good to improve the rate of cooling of foundry goods, improve shrinkage porosite；In upper mould Upper setting annular groove is discharged to the gas that casting produces, and improves the aerofluxuss of pump vane casting.

Large-scale impeller refers to the impeller of a diameter of more than 600mm, and the casting mould of this utility model scheme is suitably modified After the conditions such as physical dimension, can be used for small impeller.

Profile member can be sand mold or gypsum mould, can also be ceramic mould or other materials.Ceramic mould and stone Cream type can reach to aluminium liquid insulation and the function to feeding a casting, and ceramic mould and gypsum mould all ratio sand mold good heat insulating.

Preferably, described upper die and lower die are metal pattern, and described core is plaster core；By metal pattern and profile member Match and poured into a mould, the foundry goods that common die is made can be avoided to have the mass defects such as sand holes, shrinkage porosite.

Described first cooling end is cooling cone, is passed through cooling medium in the first cooling end.After casting filling finishes, by First cooling end is passed through cooling gas, and impeller internal is lowered the temperature.

For realizing the purpose that this utility model cools down to impeller internal, cooling cone can be replaced by Cooling Holes it is also possible to replace The cavity type structure that can enter for cooling medium on behalf of other；It is to be passed through cooling medium into the first cooling end, can be in cooling Plug, in cone or Cooling Holes, the air inlet pipe being passed through cooling gas, be passed through cooling gas in air inlet pipe, and then impeller internal is entered Row cooling.

Described second cooling end is cooling ring, and the quantity of cooling ring is more than 4, and the quantity of cooling ring is set as needed Put, cooling interannular spacing is difficult excessive, in order to avoid affecting cooling effect, when arranging more than 4 cooling rings in this utility model mould More preferably, cooling ring is arranged on above mould when needing cooling cooling effect again, that is, be assembled into when assembling casting device Above mould.Described cooling ring bottom have on the opening blown of mould upper surface；It is passed through cooling air in cooling ring Afterwards, blow out from opening, upper mould upper surface is cooled down.Using the set-up mode of multiple cooling rings, can in mould cooling stage, First it is passed through cooling medium in outermost cooling ring, afterwards, be inwardly passed through cooling medium in other cooling rings successively, It is passed through medium eventually in cooling cone, form a cooling gradient from outside to inside.

Above-mentioned opening can open up in multiple perforates of cooling ring bottom interval laying or in cooling ring bottom Slit, or other structures that from cooling ring bottom, upper mould can be blown.

Described second cooling end be helicoidal structure, described helicoidal structure bottom have on mould upper surface blow The opening of gas；After being passed through cooling air in cooling ring, blow out from opening, upper mould upper surface is cooled down.

Described second cooling end can lay for serpentine configuration or wavy shaped configuration or with other arbitrary forms or S type structure or V-structure or W type structure.

Described exhaust portion is ring groove-like structure, and the quantity of described ring groove-like structure is more than 3, the quantity root of ring groove-like structure It is configured according to needs, between ring groove-like structure, spacing is difficult excessive, more than 3 annular groove shapes knots of setting in this utility model mould More preferably, in described ring groove-like structure, multiple steam vents are laid at interval to structure exhaust effect, arrange venting plug in described steam vent；? Lay steam vent on annular groove, improve the aerofluxuss of mould, venting plug is arranged on steam vent, it is molten that casting is not arranged in a realization aerofluxus simultaneously Liquid.

According to the needs of aerofluxuss, dioptric type gap can be opened up on mould as exhaust passage；Can also be in a mold Arrange exhaust needle to be exhausted, or make setting exhaust line at the position of setting exhaust needle and venting plug into and be exhausted；? Aerofluxuss piece can be arranged in a mold be exhausted.

Described exhaust portion is helicoidal structure, and on described helicoidal structure, multiple steam vents, described aerofluxuss are laid in interval Venting plug is set in hole；Lay steam vent on annular groove, improve the aerofluxuss of mould, venting plug is set on steam vent simultaneously, real Now casting solution is not arranged in an aerofluxus.

Described upper mould lower surface arranges slag trap；The least significant end that slag trap flows in aluminium liquid, can play gathering oxide skin, The effect of foreing impuritys, removes it in Impeller Machining.

Described lower mould is detachably provided with core rod ring at cast gate laying, arranges sealing member between described core rod ring and lower mould； The dismounting of core rod ring, when appearance casting solution solidification is blocked up, is conveniently cleared up by split setting core rod ring on lower mould.

Described sealing member is graphite plate；Graphite plate is set between core rod ring and lower mould, can effectively prevent from casting solution Spill；Setting graphite plate easy to disassemble can also be cleared up when leakage aluminum.

Preferably, described lower mould lower surface is provided with multiple annular grooves；Reduce lower metal pattern with connecing between casting platform Contacting surface is amassed, make that mould places on casting platform more steadily it is ensured that in casting process mould steadiness.

The setting of described profile member bottom supports the support member of core, is provided with for pouring that casting solution enters between support member Road；Support member can be with using stepped form or other possible forms such as block, stepped, the step support type of profile member Core, the running channel between step enters in-mold molding for casting solution.Support member can arrange more than 3.

Preferably, described sand mold top is provided with the supporting positioning member supporting alignment core, and described core has to be determined with supporting The keeper that position part matches；The supporting positioning member of setting on profile member, the keeper of core bottom and supporting positioning member can To match, in molding assembly element and core, by keeper is directly engaged in supporting positioning member, you can be implemented as Type element and the positioning of core.

For realizing the positioning supporting role to core for the profile member, supporting positioning member can be in the setting of profile member top Groove, keeper can be on core setting supporting table；Supporting positioning member can also be arranged to supporting table, and will determine Position part is arranged to groove；Supporting positioning member and keeper can also be arranged to male-female engagement shape structure, or other any can Structure with positioning.

There is between described core side and profile member to be formed the first setting gap of impeller lower cover；Core side Gap between face and profile member forms impeller lower cover, in order to form enclosed impeller structure.

There is between described core upper surface and upper mould to be formed the second setting gap of impeller upper cover plate；Core upper table Gap between face and upper mould forms impeller upper cover plate, in order to form enclosed impeller structure.

It is provided with a plurality of gap in order to form impeller blade inside described core；Multiple and impeller in setting in core The gap that blade shape is adapted, in order to form the blade of impeller in casting process.

Described lower mould is provided with housing in profile member periphery, and described outer arch has and limits the first spacing of upper mould position Element, described upper mould bottom is provided with the second limit element matching with the first limit element；By housing and upper die and lower die Cooperation, form the casting mould structure of closing, housing and upper mould pass through the first limit element and the second limit element simultaneously Restriction effect, the position of mould in fixation.

In order to realize the position-limiting action to upper mould for the housing, the first limit element can be set to limiting stand, and by second Limit element is set to the limited block with limiting stand cooperation；First limit element can also be set to limited block, and by second Limit element is set to the limiting stand with limited block cooperation；First limit element and the second limit element can also be arranged to it The structure that he is any can to cooperate or engage or agree with etc..

A kind of large-scale impeller hot investment casting system, including mould and casting device, mould adopts foregoing macrophyll Wheel precision casting mold.Mould and existing casting device are cooperatively formed pump vane casting system, by cooling ring on mould and cold But the setting bored lifts the cooling effect of pump vane casting, lifts the exhaust effect of pump vane casting by the setting of annular groove on mould, By these special setting on mould structure, make the impeller casting high precision ultimately forming, quality is good, realize the precision to impeller Casting.

A kind of large-scale impeller low pressure casting system, is characterized in that, including mould and low-pressure casting apparatus, mould is using above Described large-scale impeller precision casting mold.Mould and existing low-pressure casting apparatus are cooperatively formed impeller low pressure casting system, Lift the cooling effect of pump vane casting by the setting of cooling ring on mould and cooling cone, by the setting lifting of annular groove on mould The exhaust effect of pump vane casting, by these special setting on mould structure, makes the impeller casting high precision ultimately forming, quality Good, realize the low pressure casting to impeller.

It is provided with, in described lower mould, the cast gate entering for casting solution, be provided with to pouring between described low-pressure casting apparatus and mould The heater (intermediate heater) that at mouthful, casting solution is heated；Avoid casting solution frozen plug at the cast gate of lower mould Cast gate.

Described low-pressure casting apparatus include the casting platform supporting described mould, described casting platform lower setting heating dress Put, heater top is provided with cover plate, described cover plate is connected with stalk, stalk is connected with the cast gate of mould.

Described heater is built-in with crucible, and described cover plate is inserted with air inlet pipe.

Preferably, it is provided with air layer or heat transfer layer between described crucible and heater；Make between crucible and heater By air layer or heat transfer layer isolation, it is to avoid heater directly carries out heating the damage causing crucible to crucible.

It is fixedly connected by stalk disk between described stalk and cover plate.

Preferably, described stalk top is connected with intermediate heater, and described intermediate heater passes through casting platform and pours Mouth connects；It is connected to setting intermediate heater at cast gate in stalk, the casting solution in stalk is heated, it is to avoid casting Make solution frozen plug cast gate at the cast gate of lower mould.

The beneficial effects of the utility model are：

1st, in the upper mould of this utility model mould setting annular groove and venting plug improve aerofluxuss, on upper mould setting cooling cone and To improve foundry goods rate of cooling in upper mould upper surface setting cooling ring, to be conducive to bottom in plaster core bottom using sand mold simultaneously Aluminium liquid insulation and the feeding to foundry goods.

2nd, on this utility model mould by improve aerofluxuss and cooling be capable of whole to the large-sized impeller of thin-walled Body casts program, and Forming Quality is good, high precision.

3. this utility model mould is equipped with dismountable core rod ring and graphite plate on lower mould, casting solution When solidification is blocked up, convenient dismantle core rod ring is cleared up, and can effectively prevent casting solution from spilling.

4. the mould after improving and casting device are combined by this utility model casting system, disclosure satisfy that pump vane casting process In aerofluxuss and cooling requirement, using this casting system produce impeller quality of finished product good.

Brief description

Fig. 1 is the structural representation of this utility model pump vane casting mould；

Fig. 2 is the top view of pump vane casting mould；

Fig. 3 is the structural representation of this utility model pump vane casting system；

In figure, mould on 1,2 times moulds, 3 profile members, 4 cores, 5 cooling cones, 6 cast gates, 7 cooling rings, 8 annular grooves, 9 air inlet pipe, 10 slag traps, 11 core rod rings, 12 graphite plates, 13 annular grooves, 14 steps, 15 grooves, 16 supporting tables, 17 housings, 18 limiting stands, 19 casting platforms, 20 heaters, 21 cover plates, 22 stalks, 23 stalk disks, 24 crucibles, 25 air inlet pipe, heating in the middle of 26 Device, 27 mats, 28 steam vents, 29 gaps.

Specific embodiment

With reference to the accompanying drawings and examples this utility model is further illustrated.

Embodiment 1：

As shown in figure 1, large-scale impeller precision casting mold, the upper mould 1 including corresponding setting up and down and lower mould 2, upper mould 1 It is provided with profile member 3 and core 4, upper mould 1 and lower mould 2 select metal pattern, and core 4 selects Gypsum Fibrosum in the die cavity being formed with lower mould 2 Core, upper die and lower die can also select other materials, preferably with metal material；Core can also adopt other materials, such as Pottery, high temperature polymeric materialses, sand mold etc.；Be provided with the cooling cone 5 for being cooled down to impeller internal in upper mould 1, under Mould 2 is provided with the cast gate 6 entering for casting solution, and the top of upper mould 1 is provided with the multiple coolings for upper mould 1 is carried out with jet cooling Ring 7, the lower surface of upper mould 1 is provided with the multiple annular grooves 8 for being exhausted to the gas producing in casting process.Adopt in mould Core and being combined with of profile member are incubated and the feeding to foundry goods beneficial to bottom aluminium liquid；The cooling ring and cold of setting on upper mould But cone can be very good to improve the rate of cooling of foundry goods, improves shrinkage porosite；The gas row that setting annular groove produces to casting on upper mould Go out, improve the aerofluxuss of pump vane casting.

In order to coordinate impeller shape, upper mould 1 medial recess, hollow, and it is provided with cooling cone 5, cooling cone 5 is a cavity. It is inserted with air inlet pipe 9 in cooling cone 5, after casting filling finishes, be passed through cooling gas, impeller internal is lowered the temperature.Processing it During his impeller, if impeller if upper mould medium position has similar circular arc it is also desirable to respective design depression, effect be reduce processing Surplus, raising rate of cooling.

The quantity of cooling ring 7 be more than 4, cooling ring 7 hollow, cooling ring 7 bottom have multiple on mould 1 upper surface enter The gas outlet that row is blown；After being passed through cooling air in cooling ring, blow out from gas outlet, upper metal pattern upper surface is cooled down. The cooling being disposed to reinforcement local of cooling ring.In this casting mould, in order to meet cooling gradient from top to bottom, institute Arranged above upper mould with cooling ring 7.Cooling ring 7 can be substituted for helicoidal structure or serpentine configuration or wavy shaped configuration, Can be S type structure or V-structure or W type structure, or be laid with other arbitrary structures forms.Gas outlet can be in cooling ring Multiple perforates or the slit opening up in cooling ring bottom that 7 bottom intervals are laid, or other can be from cooling ring bottom The structure that upper mould is blown.Using the set-up mode of multiple cooling rings, can be in mould cooling stage, first in outermost cooling It is passed through cooling medium in ring, afterwards, be inwardly passed through cooling medium in other cooling rings successively, be finally passed through in cooling cone Medium, forms a cooling gradient from outside to inside.

In lower mould 2 lower surface, slag trap 10 is set；Lower mould 2 is detachably provided with core rod ring 11, core rod ring at cast gate 6 laying Sealing member is set between 11 and lower mould 2；The sealing member selecting can be graphite plate 12；Lower mould 2 bottom is detachably provided with core rod ring 11, core rod ring 11 and lower mould 2 link together, split setting core rod ring 11 on lower mould 2, casting solution solidification can When blocking up, convenient dismounting, cleaning：There is graphite plate 12 in the middle of core rod ring 11 simultaneously, solution can be cast by effectively anti-leak-stopping.

Lower mould 2 lower surface is provided with multiple annular grooves 13；Reduce lower mould 2 with the contact area between casting platform 19, make It is more steady that mould is placed on casting platform.

It is provided with profile member 3, profile member 3 top is filled with core 4, core 4 bottom is placed on molding unit inside lower mould 2 On the step 14 of part 3, step 14 quantity is more than or equal to 3, is provided with running channel between two steps 14, and aluminium liquid is from wherein entering into mould Tool is internal.In the present embodiment, profile member adopts sand mold.

Profile member 3 top is provided with the groove 15 supporting alignment core 4, and core 4 has the support matching with groove 15 Platform 16；Core 4 is placed on profile member 3 step 14, and core 4 outside lower limb is axially arranged with supporting table 16, is correspondingly placed at In groove 15.

Core 4 lower surface leaves certain distance space between profile member 3, in order to form the lower cover of impeller, its away from Set from according to impeller lower cover plate thickness.Have between core 4 upper surface and upper mould 1 to be formed between the setting of impeller upper cover plate Gap, in order to form the upper cover plate of impeller, its distance sets according to the thickness of impeller upper cover plate；In order to form enclosed impeller.Type Core 4 is provided with a plurality of gap 29, in order to form the filling of the blade of impeller.

It is provided with housing 17 in profile member 3 periphery, housing 17 top has the limiting stand limiting upper mould 1 position on lower mould 2 18, upper mould 1 bottom is provided with the limited block matching with limiting stand 18, and upper mould 1 is placed on the housing 17 of lower mould 2, by housing The limiting stand 18 at 17 tops fixes its position.

As shown in Fig. 2 upper mould 1 lower surface setting annular groove 8 is more than 3, in every ring to improve aerofluxuss, the quantity of annular groove 8 Keep at a certain distance away on groove 8 the multiple steam vents 28 of laying, arranges venting plug in steam vent 28, realizes an aerofluxus and does not arrange solution.Row Being prepared from by heat proof material of vent plug, centre is provided with very little exhaust gap it is ensured that not leaking casting solution.Annular groove 8 can also set It is set to helicoidal structure.

According to the needs of aerofluxuss, dioptric type gap can be opened up on mould as exhaust passage；Can also be in a mold Arrange exhaust needle to be exhausted, or make setting exhaust line at the position of setting exhaust needle and venting plug into and be exhausted；? Aerofluxuss piece can be arranged in a mold be exhausted.

In casting process, control the temperature of mould, adjust the temperature of heater by the input adjusting cooling air Degree is to control 700-740 DEG C of temperature of aluminum liquid, to control admission pressure to control the parameter such as mold filling pressure and speed, dwell time to change Kind casting flaw, raising castability.

Embodiment 2：

Profile member in embodiment 1 is substituted for gypsum mould by sand mold, in the other structures part of mould and embodiment 1 Identical.

It should be noted that：Because gypsum mould is to be irrigated with slurry and need thoroughly being dried, so being substituted for Gypsum Fibrosum During type, need to ensure that during perfusion, each several part cooperation is unable to spillage material, gypsum mould is not forced deformation and crackle in dry run.

Embodiment 3：

Profile member in embodiment 1 is substituted for ceramic mould by sand mold, in the other structures part of mould and embodiment 1 Identical.

Embodiment 4：

Large-scale impeller hot investment casting system, including mould and casting device, mould is using foregoing as Fig. 1-Fig. 2 institute The impeller precision casting mold showing.Mould is placed on existing casting device and cooperatively forms pump vane casting system, by mould The setting of cooling ring and cooling cone lifts the cooling effect of pump vane casting, lifts pump vane casting by the setting of annular groove on mould Exhaust effect, by these special setting on mould structure, makes the impeller casting high precision ultimately forming, quality is good, and it is right to realize The hot investment casting of impeller.

Embodiment 5：

As shown in figure 3, large-scale impeller low pressure casting system, including mould and low-pressure casting apparatus, mould is using above institute The impeller precision casting mold as Figure 1-Figure 2 stated.Mould is placed on existing low-pressure casting apparatus and cooperatively forms impeller Low pressure casting system, lifts the cooling effect of pump vane casting, by mould by the setting of cooling ring on mould and cooling cone The setting of annular groove lifts the exhaust effect of pump vane casting, by these special setting on mould structure, makes the impeller ultimately forming Casting accuracy is high, and quality is good, realizes the low pressure casting to impeller.

Low-pressure casting apparatus include the casting platform 19 supporting described mould, and casting platform 19 fixes on the ground, thereon It is placed with lower mold, casts platform 19 center hollow, intermediate heater 26 therefrom passes.The setting of casting platform 19 bottom Heater 20, heater 20 top is provided with cover plate 21, and heater 20 is built-in with crucible 24, for crucible and inside Aluminium alloy is heated.Heater 20 can and crucible 24 between directly contact it is also possible to by air layer, heat transfer layer every From.Heater can be heating mantle etc..

It is inserted with stalk 22, cover plate 21 is provided with air inlet pipe 25, provides pressure, by the aluminium liquid in crucible inside crucible 24 It is filled in mould along stalk.Stalk 22 top is provided with stalk disk 23, in order to be fixedly connected on cover plate 21, rises liquid The upper outlet of pipe 22 connects with intermediate heater 26 bottom, and intermediate heater 26 passes through casting platform 19 to be connected with cast gate 6, in Between between heater 26 and core rod ring 11 arrange mat 27.

Although the above-mentioned accompanying drawing that combines is described to specific embodiment of the present utility model, not new to this practicality The restriction of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability Field technique personnel do not need to pay the various modifications that creative work can make or deformation still in protection model of the present utility model Within enclosing.

Claims (12)

1. a kind of large-scale impeller precision casting mold, is characterized in that, including the upper die and lower die of corresponding setting up and down, described on It is provided with profile member, described profile member top is provided with to be formed impeller inner chamber and blade in the die cavity that mould and lower mould are formed Core；On described, mould is provided with the first cooling end for being cooled down to impeller internal, the top of described upper mould be provided with for Upper mould is carried out with multiple second cooling ends of jet cooling, the lower surface of described upper mould is provided with the multiple aerofluxuss for being exhausted Portion.

2. large-scale impeller precision casting mold as claimed in claim 1, is characterized in that, described first cooling end is cooling cone, It is passed through cooling medium in the first cooling end.

3. large-scale impeller precision casting mold as claimed in claim 1, is characterized in that, described second cooling end is cooling ring, Described cooling ring bottom have on the opening blown of mould upper surface；Or described second cooling end is helicoidal structure, Described helicoidal structure bottom have on the opening blown of mould upper surface.

4. large-scale impeller precision casting mold as claimed in claim 1, is characterized in that, described exhaust portion is ring groove-like structure, Or described exhaust portion is helicoidal structure；In described exhaust portion, multiple steam vents are laid at interval, setting row in described steam vent Vent plug.

5. large-scale impeller precision casting mold as claimed in claim 1, is characterized in that, described lower mould is removable at cast gate laying Unload and be provided with core rod ring, sealing member is set between described core rod ring and lower mould；Described sealing member is graphite plate.

6. large-scale impeller precision casting mold as claimed in claim 1, is characterized in that, the setting of described profile member bottom supports The support member of core, is provided with the running channel entering for casting solution between support member.

7. the large-scale impeller precision casting mold as described in claim 1 or 6, is characterized in that, described profile member top is provided with Support the supporting positioning member of alignment core, described core has the keeper matching with supporting positioning member.

8. the large-scale impeller precision casting mold as described in claim 1 or 6, is characterized in that, described core side is first with molding There is between part to be formed the first setting gap of impeller lower cover；Have in order to shape between described core upper surface and upper mould Become the second setting gap of impeller upper cover plate；It is provided with a plurality of gap in order to form impeller blade inside described core.

9. the large-scale impeller precision casting mold as described in claim 1 or 6, is characterized in that, described lower mould is in profile member week While being provided with housing, described outer arch has the first limit element limiting upper mould position, and described upper mould bottom is provided with and first The second limit element that limit element matches.

10. a kind of large-scale impeller hot investment casting system, is characterized in that, including mould and casting device, described mould is using as weighed Profit requires the impeller precision casting mold described in any one of 1-9.

A kind of 11. large-scale impeller low pressure casting systems, is characterized in that, including mould and low-pressure casting apparatus, described mould adopts Impeller precision casting mold as described in any one of claim 1-9.

12. large-scale impeller low pressure casting systems as claimed in claim 11, is characterized in that, are provided with to enter for casting solution in lower mould The cast gate entering, is provided with the heater that casting solution at cast gate is heated between described low-pressure casting apparatus and mould.