CN109550899A - Fusible pattern and counter-pressure casting combined shaping method - Google Patents

Fusible pattern and counter-pressure casting combined shaping method Download PDF

Info

Publication number
CN109550899A
CN109550899A CN201811420752.8A CN201811420752A CN109550899A CN 109550899 A CN109550899 A CN 109550899A CN 201811420752 A CN201811420752 A CN 201811420752A CN 109550899 A CN109550899 A CN 109550899A
Authority
CN
China
Prior art keywords
mould group
pattern
casting
counter
combined
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811420752.8A
Other languages
Chinese (zh)
Inventor
张旭亮
刘颖卓
何凯
陈俊杰
陈加运
孙浩
罗昭锐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Space Precision Machinery Research Institute
Original Assignee
Shanghai Space Precision Machinery Research Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Space Precision Machinery Research Institute filed Critical Shanghai Space Precision Machinery Research Institute
Priority to CN201811420752.8A priority Critical patent/CN109550899A/en
Publication of CN109550899A publication Critical patent/CN109550899A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/02Sand moulds or like moulds for shaped castings
    • B22C9/04Use of lost patterns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00Pressure casting; Vacuum casting
    • B22D18/04Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

The present invention provides a kind of fusible patterns and counter-pressure casting combined shaping method, hot investment casting part is produced using fusible pattern and counter-pressure casting combined forming process, this method had both had the characteristics that dimensional accuracy was high, surface quality is good, have product fine and close again simultaneously, the good advantage of internal soundness is the effective way of thin-wall member forming.Utilize method of the invention, it can not only realize the whole near-net forming of labyrinth, it increases substantially the utilization rate of material and reduces production cost, meet short, with short production cycle, the high-efficient manufacture requirement of process, but also the weak links such as welding in labyrinth, riveting, mechanical connection can be reduced, labyrinth overall performance is improved, realizes the lightweight of component.

Description

Fusible pattern and counter-pressure casting combined shaping method
Technical field
The present invention relates to a kind of fusible patterns and counter-pressure casting combined shaping method
Background technique
Currently, mainly applying sand casting process in equipment component manufacture, have easy to operate, lower-cost excellent Gesture.With equipment lightweight requirements continuous improvement, sand casting in terms of manufacturing complex component existing some problems also by Gradually highlight:
(1) dimensional accuracy is low: sand casting use molding modeling, manufacture complex component when, need to manufacture muti-piece casting mold and Row group type and casting again after sand core, founding molding, group type process generate the dimensional accuracy of type chamber and final casting larger It influences.In addition, sand casting also needs to also increase the passive weight of component using pattern draft, reduce the light of weaponry Quantization level.
(2) casting thin-wall construction forming difficulty is high: sand casting is poor in terms of special-shaped and thin-wall construction forming capacity, because This special-shaped, thin-wall construction can not pass through sand casting near-net-shape, it is desirable that forming wall thickness 3mm or more.
Summary of the invention
The purpose of the present invention is to provide a kind of fusible patterns and counter-pressure casting combined shaping method.
To solve the above problems, the present invention provides a kind of fusible pattern and counter-pressure casting combined shaping method, comprising:
Step S1 suppresses hot investment casting wax-pattern;
Step S2 carries out group weldering to the hot investment casting wax-pattern, by part dedicated pouring technique by qualified hot investment casting Wax-pattern and corresponding dead head are combined, the mould group combined;
Step S3 carries out oil removing to the mould group combined;
Step S4 prepares hanging coating;
Step S5 carries out hanging sand to the mould group;
The mould group is dried in step S6;
Step S7 carries out electric heating dewaxing to the mould group;
Step S8 roasts the mould group;
Crucible equipped with fusing molten metal is transferred in differential pressure equipment by step S9, guarantees that aluminium alloy sealer is complete It is good;
Step S10, partition and sealing ring in placement, being put into casting equipment among stalk therefrom partition;
Mould group after roasting is embedded in sandbox by step S11, is aligned stalk cast gate, tests simultaneously connection signal line;
Casting process parameters are arranged in step S12, start casting program in console;
Step S13 is opened to locking device, is transferred from shell, casting complete.
Further, in the above-mentioned methods, step S1, suppress hot investment casting wax-pattern before, further includes:
The mold temperature of hot investment casting wax-pattern is suppressed less than 30 DEG C, wax injector air pressure is 0.6MPa~0.8MPa.
Further, in the above-mentioned methods, after compacting hot investment casting wax-pattern, further includes:
1min~2min is cooled down after the completion, is dismantled the mold and is taken out hot investment casting wax-pattern, and cools down 10min into the water More than.
Further, in the above-mentioned methods, by part dedicated pouring technique by qualified hot investment casting wax-pattern and corresponding Dead head is combined, after the mould group combined, further includes:
The mould group combined is stored one week under 15 DEG C~25 DEG C environment.
Further, in the above-mentioned methods, oil removing is carried out to the mould group combined, comprising:
The mould group for preparing coating is put into the container for filling degreaser, mould group is carefully cleaned with banister brush or gauze and carries out clearly Remove oil;
After oil removing, it is to clean up in 15 DEG C~25 DEG C water that mould group, which is immersed in temperature,.
Further, in the above-mentioned methods, it prepares in hanging coating, the density of the coating is 1.64~1.72.
Further, in the above-mentioned methods, hanging sand is carried out to the mould group, comprising:
Mould group is continuously immersed in coating 2 times~3 times, to form superficial layer on the surface of mould group;
It is immersed in coating 1 time~2 times according to part shape, to form enhancement layer on the superficial layer.
Further, in the above-mentioned methods, the mould group is dried, comprising:
It is dry that nature, ventilation and ammonia are successively carried out to the mould group.
Further, in the above-mentioned methods, to the mould group carry out electric heating dewaxing in, dewaxing furnace temperature be 120 DEG C~ 140 DEG C, keep the temperature 1.5h~3h.
Further, in the above-mentioned methods, in roasting to the mould group, temperature is put into no more than 500 DEG C of roasters It is interior, it heats up 3h~4h to 900 DEG C, and keep the temperature 2h~2.5h.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, fusible pattern formwork technique produce it is accurate complicated, close to product final form, do not process or process less can be direct The metal parts or exquisite craftwork used, are a kind of near net-shaped metal liquid forming technologies.
2, an important feature of counter-pressure casting is that molten metal is made to be solidified and be crystallized under pressure.Casting has Good mechanics and mechanical performance, consistency height, stay in grade, accurate size.
3, the present invention combines precision casting technology and counter-pressure casting technology, realize the high quality of typical thin-wall member without Surplus forming, has the characteristics that stock utilization is high, at low cost, the period is short, is that the important forming mode of the following high-end casting mentions Metal-forming techniques ability is risen to be of great significance.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, With reference to embodiment The present invention is described in further detail.
The present invention provides a kind of fusible pattern and counter-pressure casting combined shaping method, comprising:
Step S1 suppresses hot investment casting wax-pattern;
Step S2 carries out group weldering to the hot investment casting wax-pattern, by part dedicated pouring technique by qualified hot investment casting Wax-pattern and corresponding dead head are combined, the mould group combined;
Step S3 carries out oil removing to the mould group combined;
Step S4 prepares hanging coating;
Step S5 carries out hanging sand to the mould group;
The mould group is dried in step S6;
Step S7 carries out electric heating dewaxing to the mould group;
Step S8 roasts the mould group;
Crucible equipped with fusing molten metal is transferred in differential pressure equipment by step S9, guarantees that aluminium alloy sealer is complete It is good;
Step S10, partition and sealing ring in placement, being put into casting equipment among stalk therefrom partition;
Mould group after roasting is embedded in sandbox by step S11, is aligned stalk cast gate, tests simultaneously connection signal line;
Casting process parameters are arranged in step S12, start casting program in console;
Step S13 is opened to locking device, is transferred from shell, casting complete.
Here, the present invention includes compacting hot investment casting wax-pattern, the weldering of wax-pattern group, wax-pattern oil removing, hanging, shell hanging sand, shell The processes such as dry, electric heating dewaxing, Baking and differential pressure casting.The method of the present invention realizes the high quality nothing left of typical thin-wall member Amount forming, has the characteristics that stock utilization is high, at low cost, the period is short, is the important forming mode of the following high-end casting.
Model casting is also known as lost-wax casting, is a kind of few casting method without surplus, has dimensional accuracy height, surface quality The advantages that good, but it is confined to the production of miniature precision casting.Counter-pressure casting is also referred to as Counter pressure casting, is tied under low pressure casting and pressure The combination of two kinds of technique of crystal solidification has the features such as filling is steady, and internal soundness is high.The present invention proposes to cast using fusible pattern and differential pressure Combined forming process production hot investment casting part is made, this method had not only had the characteristics that dimensional accuracy was high, surface quality is good, but also had There is product densification, the good advantage of internal soundness is the effective way of thin-wall member forming.Using method of the invention, not only may be used The whole near-net forming for realizing labyrinth, increases substantially the utilization rate of material and reduces production cost, and it is short, raw to meet process The manufacture requirement that the period is short, high-efficient is produced, but also the weak links such as welding in labyrinth, riveting, mechanical connection can be reduced, Labyrinth overall performance is improved, realizes the lightweight of component.
Preferably, step S1, suppress hot investment casting wax-pattern before, further includes:
The mold temperature of hot investment casting wax-pattern is suppressed less than 30 DEG C, wax injector air pressure is 0.6MPa~0.8MPa.
Preferably, step S1, suppress hot investment casting wax-pattern after, further includes:
1min~2min is cooled down after the completion, is dismantled the mold and is taken out hot investment casting wax-pattern, and cools down 10min into the water More than.
Preferably, step S2, by part dedicated pouring technique by qualified hot investment casting wax-pattern and corresponding dead head into Row combines, after the mould group combined, further includes:
The mould group combined is stored one week under 15 DEG C~25 DEG C environment.
Preferably, step S3 carries out oil removing to the mould group combined, comprising:
The mould group for preparing coating is put into the container for filling degreaser, mould group is carefully cleaned with banister brush or gauze and carries out clearly Remove oil;
After oil removing, it is to clean up in 15 DEG C~25 DEG C water that mould group, which is immersed in temperature,.
Preferably, step S4 is prepared in hanging coating, and the density of the coating is 1.64~1.72.
Preferably, step S5 carries out hanging sand to the mould group, comprising:
Mould group is continuously immersed in coating 2 times~3 times, to form superficial layer on the surface of mould group;
It is immersed in coating 1 time~2 times according to part shape, to form enhancement layer on the superficial layer.
Preferably, in step S6, the mould group is dried, comprising:
It is dry that nature, ventilation and ammonia are successively carried out to the mould group.
Preferably, step S7 carries out in electric heating dewaxing the mould group, and dewaxing furnace temperature is 120 DEG C~140 DEG C, heat preservation 1.5h~3h.
Preferably, step S8, roasts the mould group, is put into no more than 500 DEG C roasters of temperature, heat up 3h ~4h to 900 DEG C, and keep the temperature 2h~2.5h.
Embodiment 1
By taking the main frame rack of certain equipment configuration part as an example, material ZL101A, size Φ 500mm at maximum outer circle, height 300mm, most thin position are 3mm, and this method comprises the following steps that
S1, compacting hot investment casting wax-pattern, wax injector air pressure are 0.6MPa;
S2, the weldering of wax-pattern group, model of the bottom filling in conjunction with the running channel of gap are combined;
S3, dehydrated alcohol 60%, tap water (15 DEG C~25 DEG C of water temperature) 40%, with banister brush or gauze carefully clean mould group into Row cleaning oil removing;
S4, preparation hot investment casting hanging coating, coating density 1.65;
It is continuously immersed in S5, surface coating 2 times, enhancement layer immerses 1 time;
S6, mould group is spontaneously dried under 15 DEG C~25 DEG C of temperature of ventilating air, by mould after the completion of natural drying Group puts exhausting cabinet into and is aerated drying, and after the completion of aeration-drying, mould group is put into ammonia case by every layer of drying time 15min, Drying time 20min.
S7,120 DEG C of furnace temperature of dewaxing, keep the temperature 1.5h.
S8,3h to 900 DEG C of heating, keep the temperature 2h.
S9, the crucible equipped with fusing molten metal is transferred in differential pressure equipment, aluminium alloy sealer is intact;
Partition and sealing ring in S10, placement, being put into casting equipment among stalk therefrom partition;
S11, the shell after roasting is embedded in sandbox, is aligned stalk cast gate, test simultaneously connection signal line;
S12, setting casting process parameters start casting program in console;
S13, it is opened to locking device, is transferred from shell, casting complete.
Embodiment 2
With warhead cabin shell, material ZL201, diameter of phi 340mm, height 480mm, inner surface requires not process, should Casting is whole cylindrical structure, and this method comprises the following steps that
S1, compacting hot investment casting wax-pattern, wax injector air pressure are 0.8MPa;
S2, the weldering of wax-pattern group, model of the bottom filling in conjunction with the running channel of gap are combined;
S3, dehydrated alcohol 60%, tap water (15 DEG C~25 DEG C of water temperature) 40%, with banister brush or gauze carefully clean mould group into Row cleaning oil removing;
S4, preparation hot investment casting hanging coating, coating density 1.70;
It is continuously immersed in S5, surface coating 3 times, enhancement layer immerses 2 times;
S6, mould group is spontaneously dried under 15 DEG C~25 DEG C of temperature of ventilating air, by mould after the completion of natural drying Group puts exhausting cabinet into and is aerated drying, and after the completion of aeration-drying, mould group is put into ammonia case by every layer of drying time 20min, Drying time 30min.
S7,140 DEG C of furnace temperature of dewaxing, keep the temperature 2.0h.
S8,4h to 900 DEG C of heating, keep the temperature 2.5h.
S9, the crucible equipped with fusing molten metal is transferred in differential pressure equipment, aluminium alloy sealer is intact;
Partition and sealing ring in S10, placement, being put into casting equipment among stalk therefrom partition;
S11, the shell after roasting is embedded in sandbox, is aligned stalk cast gate, test simultaneously connection signal line;
S12, setting casting process parameters start casting program in console;
S13, it is opened to locking device, is transferred from shell, casting complete.
Embodiment 3
Tank bracket overall dimensions be 260mm × 310mm × 220mm, material ZL114A, CT7 grades of dimension precision requirement, Average wall thickness 5mm, this method comprises the following steps that
S1, compacting hot investment casting wax-pattern, wax injector air pressure are 0.7MPa;
S2, the weldering of wax-pattern group, gap running channel model;
S3, dehydrated alcohol 60%, tap water (15 DEG C~25 DEG C of water temperature) 40%, with banister brush or gauze carefully clean mould group into Row cleaning oil removing;
S4, preparation hot investment casting hanging coating, coating density 1.68;
It is continuously immersed in S5, surface coating 2 times, enhancement layer immerses 2 times;
S6, mould group is spontaneously dried under 15 DEG C~25 DEG C of temperature of ventilating air, by mould after the completion of natural drying Group puts exhausting cabinet into and is aerated drying, and after the completion of aeration-drying, mould group is put into ammonia case by every layer of drying time 20min, Drying time 30min.
S7,140 DEG C of furnace temperature of dewaxing, keep the temperature 1.5h.
S8,3h to 900 DEG C of heating, keep the temperature 2.0h.
S9, the crucible equipped with fusing molten metal is transferred in differential pressure equipment, aluminium alloy sealer is intact;
Partition and sealing ring in S10, placement, being put into casting equipment among stalk therefrom partition;
S11, the shell after roasting is embedded in sandbox, is aligned stalk cast gate, test simultaneously connection signal line;
S12, setting casting process parameters start casting program in console;
S13, it is opened to locking device, is transferred from shell, casting complete.
Compared with prior art, this present invention have it is following the utility model has the advantages that
1, fusible pattern formwork technique produce it is accurate complicated, close to product final form, do not process or process less can be direct The metal parts or exquisite craftwork used, are a kind of near net-shaped metal liquid forming technologies.
2, an important feature of counter-pressure casting is that molten metal is made to be solidified and be crystallized under pressure.Casting has Good mechanics and mechanical performance, consistency height, stay in grade, accurate size.
3, the present invention combines precision casting technology and counter-pressure casting technology, realize the high quality of typical thin-wall member without Surplus forming, has the characteristics that stock utilization is high, at low cost, the period is short, is that the important forming mode of the following high-end casting mentions Metal-forming techniques ability is risen to be of great significance.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Obviously, those skilled in the art can carry out various modification and variations without departing from spirit of the invention to invention And range.If in this way, these modifications and changes of the present invention belong to the claims in the present invention and its equivalent technologies range it Interior, then the invention is also intended to include including these modification and variations.

Claims (10)

1. a kind of fusible pattern and counter-pressure casting combined shaping method characterized by comprising
Step S1 suppresses hot investment casting wax-pattern;
Step S2 carries out group weldering to the hot investment casting wax-pattern, by part dedicated pouring technique by qualified hot investment casting wax-pattern It is combined with corresponding dead head, the mould group combined;
Step S3 carries out oil removing to the mould group combined;
Step S4 prepares hanging coating;
Step S5 carries out hanging sand to the mould group;
The mould group is dried in step S6;
Step S7 carries out electric heating dewaxing to the mould group;
Step S8 roasts the mould group;
Crucible equipped with fusing molten metal is transferred in differential pressure equipment by step S9, guarantees that aluminium alloy sealer is intact;
Step S10, partition and sealing ring in placement, being put into casting equipment among stalk therefrom partition;
Mould group after roasting is embedded in sandbox by step S11, is aligned stalk cast gate, tests simultaneously connection signal line;
Casting process parameters are arranged in step S12, start casting program in console;
Step S13 is opened to locking device, is transferred from shell, casting complete.
2. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that step S1, compacting are accurate Before casting wax-pattern, further includes:
The mold temperature of hot investment casting wax-pattern is suppressed less than 30 DEG C, wax injector air pressure is 0.6MPa~0.8MPa.
3. fusible pattern as claimed in claim 2 and counter-pressure casting combined shaping method, which is characterized in that compacting hot investment casting wax-pattern Later, further includes:
Cool down 1min~2min after the completion, dismantle the mold and take out hot investment casting wax-pattern, and cool down into the water 10min with On.
4. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that press part dedicated pouring work Qualified hot investment casting wax-pattern and corresponding dead head are combined by skill, after the mould group combined, further includes:
The mould group combined is stored one week under 15 DEG C~25 DEG C environment.
5. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that the mould group combined into Row oil removing, comprising:
The mould group for preparing coating is put into the container for filling degreaser, with banister brush or gauze carefully clean mould group carry out cleaning remove Oil;
After oil removing, it is to clean up in 15 DEG C~25 DEG C water that mould group, which is immersed in temperature,.
6. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that preparation hanging coating In, the density of the coating is 1.64~1.72.
7. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that hung to the mould group Sand, comprising:
Mould group is continuously immersed in coating 2 times~3 times, to form superficial layer on the surface of mould group;
It is immersed in coating 1 time~2 times according to part shape, to form enhancement layer on the superficial layer.
8. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that done to the mould group It is dry, comprising:
It is dry that nature, ventilation and ammonia are successively carried out to the mould group.
9. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that carry out electricity to the mould group In heat dewaxing, dewaxing furnace temperature is 120 DEG C~140 DEG C, keeps the temperature 1.5h~3h.
10. fusible pattern as described in claim 1 and counter-pressure casting combined shaping method, which is characterized in that carried out to the mould group In roasting, it is put into no more than 500 DEG C roasters of temperature, heats up 3h~4h to 900 DEG C, and keep the temperature 2h~2.5h.
CN201811420752.8A 2018-11-27 2018-11-27 Fusible pattern and counter-pressure casting combined shaping method Pending CN109550899A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811420752.8A CN109550899A (en) 2018-11-27 2018-11-27 Fusible pattern and counter-pressure casting combined shaping method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811420752.8A CN109550899A (en) 2018-11-27 2018-11-27 Fusible pattern and counter-pressure casting combined shaping method

Publications (1)

Publication Number Publication Date
CN109550899A true CN109550899A (en) 2019-04-02

Family

ID=65867552

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811420752.8A Pending CN109550899A (en) 2018-11-27 2018-11-27 Fusible pattern and counter-pressure casting combined shaping method

Country Status (1)

Country Link
CN (1) CN109550899A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110328351A (en) * 2019-08-13 2019-10-15 西安西工大超晶科技发展有限责任公司 A kind of anti-gravity pouring investment-casting exempts from the process of sodium silicate molding

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102554125A (en) * 2011-12-28 2012-07-11 西安西工大超晶科技发展有限责任公司 Precision casting method of aluminum gearbox
CN102784902A (en) * 2012-06-21 2012-11-21 西安航空动力控制科技有限公司 Metal mold pressure regulating casting device
CN104190875A (en) * 2014-09-12 2014-12-10 中国船舶重工集团公司第十二研究所 Composite casting mold forming method for complex thin-wall casing
CN104399891A (en) * 2014-11-27 2015-03-11 温州兰理工科技园有限公司 Casting method combining investment precise shell-making process with vacuum suction molding technology
CN104690249A (en) * 2015-03-16 2015-06-10 河南科技大学 Copper alloy vacuum counter-pressure casting machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102554125A (en) * 2011-12-28 2012-07-11 西安西工大超晶科技发展有限责任公司 Precision casting method of aluminum gearbox
CN102784902A (en) * 2012-06-21 2012-11-21 西安航空动力控制科技有限公司 Metal mold pressure regulating casting device
CN104190875A (en) * 2014-09-12 2014-12-10 中国船舶重工集团公司第十二研究所 Composite casting mold forming method for complex thin-wall casing
CN104399891A (en) * 2014-11-27 2015-03-11 温州兰理工科技园有限公司 Casting method combining investment precise shell-making process with vacuum suction molding technology
CN104690249A (en) * 2015-03-16 2015-06-10 河南科技大学 Copper alloy vacuum counter-pressure casting machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110328351A (en) * 2019-08-13 2019-10-15 西安西工大超晶科技发展有限责任公司 A kind of anti-gravity pouring investment-casting exempts from the process of sodium silicate molding
CN110328351B (en) * 2019-08-13 2021-06-04 西安西工大超晶科技发展有限责任公司 Water glass sand-free molding process method for anti-gravity pouring investment casting

Similar Documents

Publication Publication Date Title
CN101598585B (en) Preparation method of aluminum-alloy gas meter end cover
CN107150115B (en) A kind of alloy matrix aluminum engine Cast iron liner composite casting moulding process
CN103521715B (en) A kind of preparation method of the titanium or titanium alloy precision casting containing elongated lumens
CN103302242A (en) Precise casing method of tiles of floating wall of combustion chamber of aeroengine
CN102921902B (en) Composite shaping technique method of iron pattern coated sand and iron type core assembly
CN104399891A (en) Casting method combining investment precise shell-making process with vacuum suction molding technology
CN104209497A (en) Plaster casting method for large-sized complex thin-walled magnesium alloy part
CN102161089B (en) Inversion casting method for casting aluminum alloy long housing with two-cavity mold
CN102078919A (en) Precision casting method of double-layer thin-wall bent pipe casting
CN109396378B (en) Arrangement method of chilling blocks
CN103691886A (en) Metal mould casting method of cylinder cover
CN105328122B (en) A kind of high ferro brake disc drag ring device for sand coated iron mould casting device and casting technique
CN102744367A (en) Lost foam-shell mold casting vibration and solidification method based on foam mold
CN102371340A (en) Lost foam casting method for large casting
CN109434012A (en) A kind of lost foam casting process of high-mechanical property casting
CN104550719A (en) Ice mold based investment casting technology
CN110340279A (en) Heavy castings casting method
CN107671258B (en) A kind of vacuum centrifugal casting preparation method of zirconium-base amorphous alloy thin-wall part
CN102699279A (en) Large-size impeller processing technique in precise casting
CN106984795B (en) A kind of temperature control clotting method of Ti55 casting high-temperature titanium alloy
CN110640085A (en) Investment casting process for hollow casting
CN107282909A (en) A kind of running gate system and centre spinning method for tube shape component
CN109550899A (en) Fusible pattern and counter-pressure casting combined shaping method
CN106077470A (en) Compacted ferrum engine cylinder cover pouring technology
CN108889924A (en) Ferromagnetic alloy vacuum casting short route casting method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190402

RJ01 Rejection of invention patent application after publication