CN105344935A - Closed impeller wax mold manufacturing method - Google Patents

Closed impeller wax mold manufacturing method Download PDF

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Publication number
CN105344935A
CN105344935A CN201510873747.2A CN201510873747A CN105344935A CN 105344935 A CN105344935 A CN 105344935A CN 201510873747 A CN201510873747 A CN 201510873747A CN 105344935 A CN105344935 A CN 105344935A
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Prior art keywords
wax
pattern
cover
open runner
center
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CN201510873747.2A
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CN105344935B (en
Inventor
黄谭喜
李水姣
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AECC South Industry Co Ltd
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China National South Aviation Industry Co Ltd
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Priority to CN201510873747.2A priority Critical patent/CN105344935B/en
Publication of CN105344935A publication Critical patent/CN105344935A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C7/00Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/02Lost patterns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/22Moulds for peculiarly-shaped castings
    • B22C9/28Moulds for peculiarly-shaped castings for wheels, rolls, or rollers

Abstract

The invention discloses a closed impeller wax mold manufacturing method. The closed impeller wax mold manufacturing method is used for preparing a closed impeller wax mold for precise casting, and comprises the following steps: (A) the closed impeller wax mold is divided into three parts for respective manufacturing; and the three parts include a gate wax mold, an internal wax mold and a cover wax mold; (B) the internal wax mold is provided with a channel mold shell for filling an opening runner; and (C) the gate wax mold and the cover wax mold in the step (A) are bonded with the internal wax mold, so that a cover is fixedly connected with the opening runner, and full filling of the channel mold shell in the step (B) in a closed cavity formed by the cover and the opening runner is guaranteed to finish the manufacturing of the closed impeller wax mold. The closed impeller wax mold manufacturing method, provided by the invention, can manufacture the mold shell corresponding to a closed airflow channel firstly, so that the quality of the mold shell for forming the closed airflow channel can be guaranteed.

Description

A kind of double shrouded wheel method for manufacturing wax membrane
Technical field
The present invention relates to precision casting technology field, especially a kind of manufacture method of the double shrouded wheel for engine, particularly a kind of double shrouded wheel method for manufacturing wax membrane.
Background technology
Double shrouded wheel, namely there is the impeller of the closed gas circulation road of profile complexity, the windage loss of impeller blade tip is reduced because it has, the feature of raising the efficiency, at the air-admission pressure-booster that the centripetal turbine of gas-turbine unit and centrifugal compressor, piston-mode motor are used, in centrifugal compressor, obtain more and more extensive use.High (the 20000r/min-40000r/min of working speed of double shrouded wheel, even higher), need when bearing the mechanical forces such as powerful centrifugal load and complicated aerodynamic force, realize combustion gas expansion work or by air compressing to design pressure, therefore it adopts hot investment casting mode to manufacture usually, and strict guarantee castability is needed in part blank manufacture process, do not allow the casting flaw affecting intensity to exist; Accurately to control the size of its pipes' analysis within the scope of design tolerance simultaneously.
Fig. 1 is a kind of structural representation of double shrouded wheel, Fig. 2 a is that the A of Fig. 1 is to perspective view, Fig. 2 b is the sectional structure schematic diagram of Fig. 2 a, shown in Fig. 1-2 b, this double shrouded wheel 1 is made up of rotating shaft 11, wheel disc 12, outer cover 13 (also claiming integral shroud) and multiple blades 14 of connecting described wheel disc 12 and described outer cover 13.The effect of described outer cover 13 is the gas channels 15 can splitting each blade 14 both sides better, that is to say and makes described gas channel 15 become closed gas circulation road, thus reduce the windage loss of the blade tip of described blade 14, raise the efficiency.The inner surface 131 (also claiming the outer flow passage face of enclosed rotor) of described outer cover 13 is connected with described blade 14 end face, is therefore the surface of revolution centered by pivot center; The outer surface 132 of described outer cover 13 needs to coordinate with small―gap suture with casing, therefore is similarly the surface of revolution centered by pivot center.
Fig. 3 is the structural representation of the blank for the manufacture of the double shrouded wheel shown in Fig. 1, shown in Figure 3, blank 2 for the manufacture of double shrouded wheel 1 has multiple closed channel 21 (with shape and the consistent size of aforementioned gas channel 15), its Chief manufacturing process is: use fusible (molten) material to manufacture fusible pattern, the shape of fusible pattern and size reflect the shape of described double shrouded wheel blank 2 and size (that is to say the shape of fusible pattern and the shape of size and described double shrouded wheel blank 2 and consistent size), and fusible pattern is also referred to as wax-pattern; In the surface coatings of wax-pattern, stucco, sclerosis, drying, repeated multiple times coating, stucco, sclerosis, drying, make formwork; Melt out wax-pattern, cleaning formwork; High-temperature roasting formwork; Pour into molten metal; Molten metal cools, solidifies; Blank can be obtained after removing the fifth wheel such as formwork, cap pouring port.Fig. 4 is the structural representation of the monoblock type wax-pattern of the existing blank for the manufacture of Fig. 3, Fig. 5 a is that the B of Fig. 4 is to perspective view, Fig. 5 b is the C-C revolved section structural representation of Fig. 5 a, shown in Fig. 4-5b, wax-pattern 3 used in existing manufacturing process is monolithic construction, primarily of wax-pattern main body 31 (shape of corresponding blank 2 and size), in order to improve castability and additional balance channel 32 and the additional cast gate 33 for pouring into molten metal.Wherein the shape of balance channel 32, quantity, size and choosing of position depend on concrete technology specification.When surface coatings, the loose sand to described monoblock type wax-pattern 3, owing to there is individual irregular cavity 310 (with shape and the consistent size of aforementioned closed channel 21) that is that close, elongated, bending in wax-pattern main body 31, to coating, the stucco operating difficulties of these cavitys 310, therefore the coating of the inner surface of these cavitys 310, stucco are of poor quality, and then the formwork surface quality made can be caused poor, thus intensity existing defects.The gas channel molding surface size deviation of the blank cast out finally can be caused large, and surface quality is poor, often occurs the defects such as pit, swollen bag, pit.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of double shrouded wheel method for manufacturing wax membrane, to reduce or to avoid problem noted earlier.
For solving the problems of the technologies described above, the present invention proposes a kind of double shrouded wheel method for manufacturing wax membrane.It is for the preparation of the double shrouded wheel wax-pattern for hot investment casting, and it comprises the steps:
Steps A, three parts are divided into manufacture respectively described double shrouded wheel wax-pattern, comprise cast gate wax-pattern, inner wax-pattern and outer cover wax-pattern, described cast gate wax-pattern comprises first depressed part, described inner wax-pattern is provided with the first center-pole, described first center-pole is provided with first protuberance corresponding with described first depressed part, a hollow via-hole and a disk body section, described disk body section is provided with multiple wax-pattern blade, the semi-enclosed open runner of described wax-pattern blade composition, described outer cover wax-pattern comprises the second center-pole for docking with described first center-pole, described second center-pole is connected with multiple passage die body, described passage die body is connected with one for closing the cover body of described open runner,
Step B, described inner wax-pattern is made the passage formwork of filling described open runner;
Step C, by the described cast gate wax-pattern in steps A and described outer cover wax-pattern bonding with described inner wax-pattern, described cover body is fixedly connected with described open runner, and ensure in the closed cavity that described cover body and described open runner are formed the passage formwork filled up in step B, complete the manufacture of described double shrouded wheel wax-pattern.
Preferably; in stepb; use a bracket and a top cover to support described inner wax-pattern and profile protection, described bracket comprises a supporting disk and a center threaded rod, and described top cover comprises multiple screening glass for the protection of described wax-pattern blade end face.
Preferably, prepare in the process of described passage formwork in step B, further use shaping sheet carries out shaping to described open runner, and described shaping sheet is provided with the lamellar body consistent with the profile of described open runner bottom surface and a handle portion be connected with described lamellar body.
Preferably, described screening glass end winding support is connected with connecting ring.
Preferably, the thickness of described screening glass and described connecting ring is 3-5mm.
Preferably, described body thickness is 3-5mm.
Preferably, in step C, after described outer cover wax-pattern is bonding with described inner wax-pattern, at the two ends of the described open runner be closed, the exposed division of described wax-pattern blade is bonded with the reinforcement wax disk(-sc) of arc.
Preferably, the thickness strengthening wax disk(-sc) is 1-3mm.
Preferably, the thickness h 1 of described first depressed part is 1/3 to 1/5 of described first protuberance diameter d 1.
Preferably, described top cover is provided with the prerotation vane be fixedly connected with described screening glass.
Double shrouded wheel method for manufacturing wax membrane provided by the present invention, the structure of existing monoblock type wax-pattern is carried out fractionation optimization, be divided into three part manufactures, thus the gas channel closed can be made first to keep semi-closed state in the fabrication process, so both first can make the formwork of the corresponding gas channel closed, and then Split type structure is combined as a whole, continue the formwork making outer profile, so just can guarantee the quality of the formwork for the formation of the gas channel closed.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the present invention and explain, not delimit the scope of the invention.Wherein,
Fig. 1 is a kind of structural representation of double shrouded wheel;
Fig. 2 a is that the A of Fig. 1 is to perspective view;
Fig. 2 b is the sectional structure schematic diagram of Fig. 2 a;
Fig. 3 is the structural representation of the blank for the manufacture of the double shrouded wheel shown in Fig. 1;
Fig. 4 is the structural representation of the monoblock type wax-pattern of the existing blank for the manufacture of Fig. 3;
Fig. 5 a is that the B of Fig. 4 is to perspective view;
Fig. 5 b is the C-C revolved section structural representation of Fig. 5 a;
Fig. 6 a is the sectional structure schematic diagram of the cast gate wax-pattern of a kind of double shrouded wheel method for manufacturing wax membrane according to a specific embodiment of the present invention;
Fig. 6 b is that perspective view is looked on a left side for the cast gate wax-pattern of Fig. 6 a;
Fig. 7 a is the structural representation of the inside wax-pattern corresponding with Fig. 6 a;
Fig. 7 b is the C1-C1 sectional structure schematic diagram of Fig. 7 a;
Fig. 8 a is the structural representation of the outer cover wax-pattern corresponding with Fig. 7 a;
Fig. 8 b is the C2-C2 sectional structure schematic diagram of Fig. 8 a;
Fig. 9 a is the structural representation of the top cover of a kind of double shrouded wheel method for manufacturing wax membrane according to a specific embodiment of the present invention;
Fig. 9 b is the C3-C3 sectional structure schematic diagram of Fig. 9 a;
Figure 10 is the structural representation of the shaping sheet corresponding with Fig. 9 a;
Figure 11 a is the manufacturing theory schematic diagram of the passage formwork of the inside wax-pattern of Fig. 7 a;
Figure 11 b is the C4-C4 revolved section structural representation of Figure 11 a;
Figure 12 a is the general assembly structural representation of the outer cover wax-pattern of the cast gate wax-pattern of Fig. 6 a, the inside wax-pattern of Fig. 7 a and Fig. 8 a;
Figure 12 b is the D place enlarged diagram of Figure 12 a;
Figure 12 c is the C5-C5 revolved section structural representation of Figure 12 a.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and the specific embodiment of the present invention is described.Wherein, identical parts adopt identical label.
Just as described in the background section, in existing manufacturing process, in order to hot investment casting double shrouded wheel, usually a monoblock type wax-pattern is first made, then formwork manufacture is being carried out by this monoblock type wax-pattern, thus cause the gas channel molding surface size deviation of the blank cast out large, surface quality is poor, often occurs the defects such as pit, swollen bag, pit.The invention provides the defect that a kind of double shrouded wheel method for manufacturing wax membrane solves prior art.
Fig. 6 a is the sectional structure schematic diagram of the cast gate wax-pattern of a kind of double shrouded wheel method for manufacturing wax membrane according to a specific embodiment of the present invention; Fig. 6 b is that perspective view is looked on a left side for the cast gate wax-pattern of Fig. 6 a; Fig. 7 a is the structural representation of the inside wax-pattern corresponding with Fig. 6 a; Fig. 7 b is the C1-C1 sectional structure schematic diagram of Fig. 7 a; Fig. 8 a is the structural representation of the outer cover wax-pattern corresponding with Fig. 7 a; Fig. 8 b is the C2-C2 sectional structure schematic diagram of Fig. 8 a; Figure 12 a is the general assembly structural representation of the outer cover wax-pattern of the cast gate wax-pattern of Fig. 6 a, the inside wax-pattern of Fig. 7 a and Fig. 8 a; Figure 12 b is the D place enlarged diagram of Figure 12 a; Figure 12 c is the C5-C5 revolved section structural representation of Figure 12 a.Shown in Fig. 6 a-8b, 12a, 12c, a kind of double shrouded wheel method for manufacturing wax membrane that the present invention proposes.It is for the preparation of the double shrouded wheel wax-pattern 4 for hot investment casting, and it comprises the steps:
Steps A, three parts are divided into manufacture respectively described double shrouded wheel wax-pattern 4, comprise cast gate wax-pattern 41, inner wax-pattern 42 and outer cover wax-pattern 43, described cast gate wax-pattern 41 comprises first depressed part 411, described inner wax-pattern 42 is provided with the first center-pole 421, described first center-pole 421 is provided with first protuberance 422 corresponding with described first depressed part 411, a hollow via-hole 423 and a disk body section 424, described disk body section 424 is provided with multiple wax-pattern blade 425, described wax-pattern blade 425 forms semi-enclosed open runner 426, described outer cover wax-pattern 43 comprises the second center-pole 431 for docking with described first center-pole 421, described second center-pole 431 is connected with multiple passage die body 432, described passage die body 432 is connected with one for closing the cover body 433 of described open runner 426,
Step B, described inner wax-pattern 42 is made the passage formwork 44 of filling described open runner 426;
Step C, by the described cast gate wax-pattern 41 in steps A and described outer cover wax-pattern 43 bonding with described inner wax-pattern 42, described cover body 433 is fixedly connected with described open runner 426, and ensure in the closed cavity that described cover body 433 and described open runner 426 are formed the passage formwork 44 filled up in step B, complete the manufacture of described double shrouded wheel wax-pattern 4.
Fig. 1 is a kind of structural representation of double shrouded wheel, Fig. 2 a be the A of Fig. 1 to perspective view, Fig. 2 b is the sectional structure schematic diagram of Fig. 2 a, and Fig. 4 is the structural representation of the monoblock type wax-pattern of the existing blank for the manufacture of Fig. 3, Fig. 5 a is that the B of Fig. 4 is to perspective view, Fig. 5 b is the C-C revolved section structural representation of Fig. 5 a, shown in Fig. 1-5b, in order to prepare described double shrouded wheel 1, technical scheme provided by the present invention and the maximum improvements of prior art are just, by carrying out fractionation optimization to the structure of monoblock type wax-pattern 3 of the prior art, be divided into three part manufactures, thus can make described cavity 310 can wax-pattern close as a whole before form semi-closed structure, that is, can when described cavity 310 remains on semi-closed structure state, first make the formwork of corresponding described cavity 310, and then Split type structure is combined as a whole, continue the formwork making outer profile, so just can guarantee the quality of the formwork for the formation of described cavity 310.
Specifically, described double shrouded wheel wax-pattern 4 prepared by the present invention, three parts are divided into corresponding to existing monoblock type wax-pattern 3 and double shrouded wheel 1, comprise the cast gate wax-pattern 41 of corresponding described cast gate 33, the inside wax-pattern 42 of the described rotating shaft 11 of corresponding described wheel disc 12, described blade 14 and part, the outer cover wax-pattern 43 of corresponding described balance channel 32 and described outer cover 13.Namely die joint between described cover body 433 and described wax-pattern blade 425, also correspond to the inner surface 131 (also claiming the outer flow passage face of enclosed rotor) of described outer cover 13.
Described first depressed part 411 and described first protuberance 422 can increase the connection area between described cast gate wax-pattern 41 and described inner wax-pattern 42, thus can ensure the intensity of bonding mutually.
The thickness h 1 of described first depressed part 411 can be set to 1/3 to 1/5 of described first protuberance 422 diameter d 1, so both can ensure the structural strength of described first depressed part 411 and described first protuberance 422, the bond area between described first depressed part 411 and described first protuberance 422 can have been ensured again.
Described hollow via-hole 423 can make when carrying out the operations such as processing to described inner wax-pattern 42, is convenient to install location.
After cast gate wax-pattern 41, inner wax-pattern 42 and outer cover wax-pattern 43 have been prepared respectively, both cast gate wax-pattern 41 and outer cover wax-pattern 43 have been placed in cleaning ambient, then independent to inner wax-pattern 42 according to step B process.Namely, the described passage formwork 44 of described open runner 426 is filled in preparation.
Due in formwork preparation process; need the operation being repeatedly coated with surface layer/backing layer material, spreading thick/fine sand; therefore; in described passage formwork 44 process of preparation; need to protect with the joint face of described cast gate wax-pattern 41 and described outer cover wax-pattern 43 described inner wax-pattern 42; avoid joint face to suffer the pollution of the foreign material such as sand, thus affect final wax-pattern quality.That is, when preparing described passage formwork 44, the material such as sheet metal or plastic foil can be utilized to protect each joint face, then utilize existing formwork preparation technology to be prepared according to the size of described passage formwork 44.
In order to enhance productivity and ensure wax-pattern quality; the present invention additionally provides a bracket 51 and top cover 52 supports described inner wax-pattern 42 and profile protection further in stepb; described bracket 51 comprises a supporting disk 511 and a center threaded rod 512, and described top cover 52 comprises multiple screening glass 521 for the protection of described wax-pattern blade 425 end face.
Shown in Figure 11 b; described bracket 51 can carry out available protecting to the joint face of corresponding described cast gate wax-pattern 41 side of described inner wax-pattern 42 (i.e. described first protuberance 422); effective support can be provided in addition to described disk body section 424; described top cover 52 comprises multiple screening glass 521 for the protection of described wax-pattern blade 425 end face, so just can carry out available protecting to the end face of the end face of described wax-pattern blade 425 and the corresponding described outer cover wax-pattern 43 of described first center-pole 421.
Described screening glass 521 end can be fixedly connected with connecting ring 522.The structural strength of described screening glass 521 can be strengthened like this; avoid preparing in described passage formwork 44 process; described screening glass 521 is subjected to displacement; and described connecting ring 522 can also be connected with described bracket 51 further, thus better ensure the stable connection between described bracket 51 and described top cover 52.
Described bracket 51 and described top cover 52 can be made up of metal material (such as stainless steel) or resin material, and in order to alleviate the weight of described bracket 51 and described top cover 52, the thickness of described screening glass 521 and described connecting ring 522 can be 3-5mm.
Because described wax-pattern blade 425 is thinner, and in formwork preparation process, need the operation being repeatedly coated with surface layer/backing layer material, spreading thick/fine sand, in order to avoid described wax-pattern blade 425 produces deformation, prepare in the process of described passage formwork 44 in step B, further use shaping sheet 53 carries out shaping to described open runner 426, and described shaping sheet 53 is provided with the lamellar body 531 consistent with the profile of described open runner 426 bottom surface and a handle portion 532 be connected with described lamellar body 531.Concrete preparation section can be: be coated with capstock, spread fine sand, drying---be coated with for several times backing layer material, spread coarse sand, drying---be coated with backing layer material, spread coarse sand, shaping---dry---be coated with capstock,---drying---painting capstock that spreads fine sand, shaping, drying.
When described lamellar body 531 moves back and forth in described open runner 426, correction shaping can be carried out to described wax-pattern blade 425.Described lamellar body 531 can be made up of metal material (such as stainless steel) or resin material, and its thickness can be set to 3-5mm, can reduce construction weight like this when ensureing structural strength.
In order to better control the direction of motion of described lamellar body 531 in the use procedure of described shaping sheet 53, described top cover 52 can be provided with the prerotation vane 523 be fixedly connected with described screening glass 521.Like this by the guiding of described prerotation vane 523, described lamellar body 531 can facilitate and passes in and out described open runner 426 accurately.
After described passage formwork 44 fills full described open runner 426; the protection of the joint face to described inner wax-pattern 42 can be removed; then by the described cast gate wax-pattern 41 in steps A and described outer cover wax-pattern 43 bonding with described inner wax-pattern 42; described cover body 433 is fixedly connected with described open runner 426; and ensure in the closed cavity that described cover body 433 and described open runner 426 are formed the passage formwork 44 filled up in step B, complete the manufacture of described double shrouded wheel wax-pattern 4.
In order to compensate the structural strength of wax-pattern blade 425, after described outer cover wax-pattern 43 is bonding with described inner wax-pattern 42, at the two ends of the described open runner 426 be closed, the exposed division of described wax-pattern blade 425 can be bonded with the reinforcement wax disk(-sc) 61 of arc.The thickness strengthening wax disk(-sc) 61 can be set to 1-3mm.
Double shrouded wheel method for manufacturing wax membrane provided by the present invention, the structure of existing monoblock type wax-pattern is carried out fractionation optimization, be divided into three part manufactures, thus the gas channel closed can be made first to keep semi-closed state in the fabrication process, so both first can make the formwork of the corresponding gas channel closed, and then Split type structure is combined as a whole, continue the formwork making outer profile, so just can guarantee the quality of the formwork for the formation of the gas channel closed.
Although it will be appreciated by those skilled in the art that the present invention is described according to the mode of multiple embodiment, not each embodiment only comprises an independently technical scheme.So describe in description be only used to clear for the purpose of; description should integrally be understood by those skilled in the art, and regards technical scheme involved in each embodiment as the mode that mutually can be combined into different embodiment to understand protection scope of the present invention.
The foregoing is only the schematic detailed description of the invention of the present invention, and be not used to limit scope of the present invention.Any those skilled in the art, the equivalent variations done under the prerequisite not departing from design of the present invention and principle, amendment and combination, all should belong to the scope of protection of the invention.

Claims (10)

1. a double shrouded wheel method for manufacturing wax membrane.It is for the preparation of the double shrouded wheel wax-pattern (4) for hot investment casting, and it is characterized in that, it comprises the steps:
Steps A, three parts point described double shrouded wheel wax-pattern (4) are divided into manufacture respectively, comprise cast gate wax-pattern (41), inner wax-pattern (42) and outer cover wax-pattern (43), described cast gate wax-pattern 41 comprises first depressed part (411), described inner wax-pattern (42) is provided with the first center-pole (421), described first center-pole (421) is provided with first protuberance (422) corresponding with described first depressed part (411), a hollow via-hole (423) and a disk body section (424), described disk body section (424) is provided with multiple wax-pattern blade (425), described wax-pattern blade (425) forms semi-enclosed open runner (426), described outer cover wax-pattern (43) comprises the second center-pole (431) for docking with described first center-pole (421), described second center-pole (431) is connected with multiple passage die body (432), described passage die body (432) is connected with one for closing the cover body (433) of described open runner (426).。
Step B, described inner wax-pattern (42) is made the passage formwork (44) of filling described open runner (426).
Step C, by the described cast gate wax-pattern (41) in steps A and described outer cover wax-pattern (43) bonding with described inner wax-pattern (42), described cover body (433) is fixedly connected with described open runner (426), and ensure in the closed cavity that described cover body (433) and described open runner (426) are formed the passage formwork (44) filled up in step B, complete the manufacture of described double shrouded wheel wax-pattern (4).
2. the method for claim 1; it is characterized in that; in stepb; a bracket (51) and a top cover (52) is used to support described inner wax-pattern (42) and profile protection; described bracket 51 comprises a supporting disk (511) and a center threaded rod (512), and described top cover (52) comprises multiple screening glass (521) for the protection of described wax-pattern blade (425) end face.
3. the method as described in one of claim 1-2, it is characterized in that, prepare in the process of described passage formwork (44) in step B, further use shaping sheet (53) carries out shaping to described open runner (426), and described shaping sheet (53) is provided with the lamellar body (531) consistent with the profile of described open runner (426) bottom surface and a handle portion (532) be connected with described lamellar body (531).
4. method as claimed in claim 2, it is characterized in that, described screening glass (521) end winding support is connected with connecting ring (522).
5. the method as described in one of claim 1-4, is characterized in that, the thickness of described screening glass (521) and described connecting ring (522) is 3-5mm.
6. method as claimed in claim 3, it is characterized in that, described lamellar body (531) thickness is 3-5mm.
7. the method as described in one of claim 1-6, it is characterized in that, in step C, after described outer cover wax-pattern (43) is bonding with described inner wax-pattern (42), at the two ends of the described open runner (426) be closed, the exposed division of described wax-pattern blade (425) is bonded with the reinforcement wax disk(-sc) (61) of arc.
8. method as claimed in claim 7, is characterized in that, the thickness strengthening wax disk(-sc) (61) is 1-3mm.
9. the method as described in one of claim 1-8, is characterized in that, the thickness h 1 of described first depressed part (411) is 1/3 to 1/5 of described first protuberance (422) diameter d 1.
10. method as claimed in claim 3, it is characterized in that, described top cover (52) is provided with the prerotation vane (523) be fixedly connected with described screening glass (521).
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CN109128036A (en) * 2017-06-28 2019-01-04 通用电气公司 The casting core-shell hybrid mold and ceramic shell of increasing material manufacturing

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CN204061301U (en) * 2014-09-22 2014-12-31 安徽应流铸业有限公司 The cere adhesive tool of double shrouded wheel
CN204171276U (en) * 2014-10-21 2015-02-25 胜利油田胜利泵业有限责任公司 Submersible electric pump pump vane casting Wax mold

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* Cited by examiner, † Cited by third party
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CN107297453A (en) * 2017-05-10 2017-10-27 株洲中航动力精密铸造有限公司 Method for manufacturing wax membrane for shrouded centrifugal impellor
CN107297453B (en) * 2017-05-10 2020-07-21 中国航发南方工业有限公司 Wax mould manufacturing method for closed centrifugal impeller
CN109128036A (en) * 2017-06-28 2019-01-04 通用电气公司 The casting core-shell hybrid mold and ceramic shell of increasing material manufacturing
US11235378B2 (en) 2017-06-28 2022-02-01 General Electric Company Additively manufactured casting core-shell hybrid mold and ceramic shell

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