CN1827256A - Method for direct production of core in narrow groove and blind hole of wax mould - Google Patents
Method for direct production of core in narrow groove and blind hole of wax mould Download PDFInfo
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- CN1827256A CN1827256A CN 200610011679 CN200610011679A CN1827256A CN 1827256 A CN1827256 A CN 1827256A CN 200610011679 CN200610011679 CN 200610011679 CN 200610011679 A CN200610011679 A CN 200610011679A CN 1827256 A CN1827256 A CN 1827256A
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Abstract
The invention relates to a method for directly producing core inside the narrow groove and blind hole of wax hole, which provides a method that casting core with simple molding pattern. Said method fills the slurry with accelerant into the forward groove and blind hole before assembling the wax mold to prepare the core, which comprises: preparing wax mold to be compressed; preparing wax mold; adding raw materials at the mass percentages as: fireproof material : accelerant : surface active agent : defoaming agent as 100 : (100-40) : (0.1-10) : (0.1-0.3) : (0.1-0.3) to prepare the slurry; then filling into the wax mold to be shaped; being solidified to attain the core inside the narrow groove and blind hole. The inventive method is simple without special device and it can save energy, reduce cost, with shorten producing period.
Description
Technical field
Direct manufacturing mold core method in a kind of narrow groove, the blind hole at wax-pattern, the method that relates to a kind of easy system investment casting cores newly, more particularly, be a kind of at wax-pattern assembling forward direction deep trouth, blind holes etc. are located the method that filling is added with the pulp preparation core of coagulant, belong to the method and technology field of quick manufacturing mold core in the model casting.
Background technology
Model casting general technology process: processes such as compacting wax-pattern, system cast gate wax-pattern, group tree, system shell, dewaxing, roasting, cast, cleaning.
The inner chamber of general precision casting forms by being coated with operations such as hanging coating, stucco together with profile, does not need autocratic core.But when core cavity is too narrow or complex-shaped, conventional be coated with operations such as hanging coating, stucco and can't implement at all, or the inner chamber shell can't be dry during sclerosis, just must use prefabricated core to form core cavity, aero-engine hollow turbine vane for example, the cooling duct of blade is full of twists and turns, and shape is if ceramic core just must be adopted in the labyrinth.
It is introduced that about 20%～30% part uses ceramic core in U.S.'s investment-casting.Along with investment-casting to more accurate, more complicated, more large-scale development, investment casting cores is also had higher requirement.
Core production's method has three classes at present: (1) pre-formed core, annotate ceramic core manufacturing, grouting shaped ceramic core etc. such as hot pressing; (2) irritate sand as core behind system 1～2 stratotype shell; (3) the manufacturing mold core three major types method of directly being in the milk.
Fig. 1 is that several need use the model casting of core to comprise process flow diagrams such as coremaking, molding, system shell, and wherein solid box is a manufacturing mold core part (in order to strengthen the contrast intuitive, having comprised flow process of the present invention in the schematic diagram).
(1) the ceramic core method is annotated in hot pressing
◆ ceramic core method technical process is annotated in hot pressing
1) manufacturing mold core mould design, the accurate core mold of manufacturing reduced scale;
2) preparation of core stock is put into ball mushroom machine mix grinding with powder and mineralizer, takes out oven dry; Plasticizer is added in the stainless container of belt stirrer, be heated to 85 ~ 90 ℃, add the powder of oven dry and the mixture and the surfactant of mineralizer while stirring;
3) the about 2.7～4.0MPa of pressure injection pressure of the general pressure sintering moulding of compacting core base, the pressure injection temperature is higher 30～80 ℃ than plasticizer fusing point, the die mould temperature is 40～50 ℃, about 10～30s of dwell time.
4) need dress alms bowl and filling filler, de-waxing before de-waxing, the sintering core base core base sintering:
1. adorning alms bowl and filling filler dress alms bowl is that the core base substrate of compression moulding is imbedded in the alms bowl that fills filler, prevents core deformed damaged in roasting process.Filler is incubated the baked commercial alumina of 4～6h down for 1300 ℃ commonly used.At amplitude is the vibration bench moulding of 0.2～0.5mm.
2. de-waxing is generally absorbed by the filler around the base substrate immediately in the fusing of being heated gradually of plasticizer below 600 ℃, and by filler to external diffusion, volatilization and burning are about to plasticizer and remove; At this moment, core is sintering not, also is in complete loose condition (of surface), keeps its shape and size by the consolidation effect of filler on every side;
3. the common sintering temperature of sintering core base core is 1100～1400 ℃, insulation 2～4h.
5) strengthen core and adopt resin, silicate hydrolyzate liquid or Ludox that core is carried out low-temperature reinforcement and High-Temperature Strengthening, promptly obtain the core that needs in the investment-casting production process after the intensive treatment.
6) system wax-pattern die mould design, manufacturing wax-pattern die mould
7) core is put into die mould and will put into die mould through the core of strengthening
8) compacting of compacting wax-pattern is surrounded by the wax-pattern of core
9) system running gate system wax-pattern adopts compacting or records legal system running gate system wax-pattern
10) the group wax tree to the running gate system wax-pattern, is formed wax tree with the wax-pattern assembly welding
11) on the system shell coating, stucco, the drying of refractory material and binding agent mixed preparing are hardened, repeated multiple times is made the shell of the required number of plies.
◆ hot pressing is annotated ceramic core technology and is existed not enough:
1) equipment such as the accurate core mold of essential design reduced scale tool, the press injector that needs configuration compacting core base, high temperature sintering furnace obviously increase casting cost and production cycle;
2) press wax-pattern before, earlier core is put into the wax-pattern die mould, core deforms easily, misplaces and defective such as fracture during the pressure injection fusible pattern;
3) ceramic core often uses different materials with shell, and thermal coefficient of expansion is different, then can change inconsistent cause core distortion or fracture because of both when shell roasting and cast.
4) flat elongated or complex-shaped ceramic core also deforms easily during casting metal, misplaces, even fracture.
(2) grouting shaped ceramic core is made
◆ grouting shaped ceramic core production process
1) coremaking box design, the accurate core box of manufacturing reduced scale
2) the pulp preparation pulp preparation comprises hydrolyzing ethyl silicate, preparation slurry
1. hydrolyzing ethyl silicate prepares hydrolyzate according to required silica quality mark in the hydrolyzate;
2. prepare slurry and in silicate hydrolyzate liquid, add refractory material, mixing; Add coagulant, mixing;
3) 1. grouting shaping core base grouting shaping core base comprises slurry is poured into core box; 2. solidify;
3. open core box; 4. molding; 5. the core base is put in the special loose tool; 6. igniting self-combustion
4) the common sintering temperature of sintering core base core base is 700～1050 ℃.
5) strengthening core adopts silicate hydrolyzate liquid or Ludox core to be carried out promptly obtaining after the intensive treatment core that needs in the investment-casting production.
6) system wax-pattern die mould design, manufacturing wax-pattern die mould
7) core is put into die mould and will put into die mould through the core of strengthening
8) compacting of compacting wax-pattern is surrounded by the wax-pattern of core
9) system running gate system wax-pattern adopts compacting or records legal system running gate system wax-pattern
10) the group wax tree to the running gate system wax-pattern, is formed wax tree with the wax-pattern assembly welding
11) on the system shell coating, stucco, the drying of refractory material and binding agent mixed preparing are hardened, repeated multiple times is made the shell of the required number of plies.
◆ grouting shaped ceramic core technology exists not enough:
1) equipment such as the accurate core box of essential design reduced scale, need configuration high temperature sintering furnace obviously increases casting cost and production cycle.
2) before the pressure wax-pattern, earlier core is put into the wax-pattern die mould, defectives such as core distortion, dislocation and fracture take place during the pressure injection fusible pattern easily;
3) ceramic core often uses different materials with shell, and thermal coefficient of expansion is different, then can change inconsistent cause core distortion or fracture because of both when shell roasting and cast.
4) flat elongated or complex-shaped ceramic core, core also deforms easily, misplaces during casting metal, even fracture.
(3) system is irritated the method for sand behind 1～2 stratotype shell again, for avoiding buying and the trouble of prefabricated core the core-making method that some producers take.
◆ technical process
1) system wax-pattern die mould design, manufacturing wax-pattern die mould
2) compacting of compacting wax-pattern is not surrounded by the wax-pattern of core
3) system running gate system wax-pattern adopts compacting or records legal system running gate system wax-pattern
4) the group wax tree to the running gate system wax-pattern, is formed wax tree with the wax-pattern assembly welding
5) the system shell is made inside and outside the 1st layer of shell of wax-pattern simultaneously: go up by the coating of refractory material and binding agent mixed preparing, stucco, disclose in the hole and sand, sclerosis are floated by narrow groove place with iron wire, could make inside and outside the 2nd layer of shell of wax-pattern according to circumstances simultaneously, floating sand, sclerosis are disclosed with thin wire again by narrow groove, aperture place
6) in the hole, irritate sand in the hole and narrow groove place fill sand and promptly obtain the core that needs in the investment-casting production process;
The shell of 7) continuation system wax-pattern outer surface, repeated multiple times is made the shell of the required number of plies.
◆ irritate the sand method behind system 1～2 stratotype shell again and exist not enough:
1) aperture of often narrow, blind hole during less than 5mm, needs careful system 1 to 2 laminar surface shell than big, diameter,
For preventing that putting up a bridge, float sand too much also needs go to disclose by the hole with thin wire.But each wax-pattern also not all is beneficial in the position of module tree and discloses the hole;
2) internal diameter of system 1～2 stratotype shell metapore is littler, and the difficulty of irritating sand is very big;
3) shell herein (promptly being equivalent to core) intensity is low, easily runs away during cast, and cleaning is difficulty quite.
(4) the direct manufacturing mold core that is in the milk
Manufacturing belt grooves in the 52nd technical conference collection of thesis of in September, 2004 U.S.'s model casting association, a kind of new method introduction of blind hole core, develop a kind of novel core material, between molding novel core material is being filled on the wax-pattern, novel core material-NCM, be the pair of separated body, comprise binding agent and powder, pour into the wax-pattern cavity after the mixing, test 100% success with the space flight foundry goods.
But not enough is that concrete raw material, prescription etc. all do not disclose.
Summary of the invention
For solving the deficiency of above-mentioned manufacturing mold core, direct direct manufacturing mold core in the narrow groove of wax-pattern, blind hole, key is to select the coagulant of slurry, makes in a kind of narrow groove at wax-pattern, the blind hole directly manufacturing mold core method.
The object of the present invention is to provide direct manufacturing mold core method in a kind of narrow groove, the blind hole, solve the deficiency of above-mentioned production intricate casting technology at wax-pattern.
Direct manufacturing mold core method in a kind of narrow groove, the blind hole at wax-pattern, this method may further comprise the steps:
(1) system wax-pattern die mould
According to the foundry goods requirement, design, manufacturing wax-pattern die mould;
(2) system wax-pattern
Wax material is pressed into the described wax-pattern die mould of step (1), makes the wax-pattern of deep trouth, blind hole;
(3) pulp preparation
Binding agent in the slurry is divided into water based adhesive and pure based binder two big classes according to the solvent difference; The inhomogeneity binding agent, paste composition and preparation are different;
For water based adhesive:
Add raw material blending according to each mass unit proportioning in proper order by binding agent, surfactant, refractory material, defoamer, coagulant and prepare slurry;
Binding agent: refractory material: coagulant: surfactant: defoamer=
100∶(100～400)∶(0.1～10)∶(0.1～0.3)∶(0.1～0.3)；
Described binding agent is Ludox, strengthen any in rapidly-dried silica sol, waterglass, the aluminium dihydrogen phosphate;
Described refractory material any or multiple in refining quartz, vitreous silica, gangue, corundum, zirconium English, the brown corundum;
Described surfactant is that fatty alcohol polyoxy ethylether (JFC), sodium alkyl sulfonate are any;
Described defoamer is a silicone defoaming agent;
Described coagulant is any or multiple in acid, ackd salt, organic acid, the alcohols;
To pure based binder:
Add raw material blending according to each quality proportioning in proper order by binding agent, refractory material, coagulant and prepare slurry;
Binding agent: refractory material: coagulant=100: (100～400): (0.1～10);
Described binding agent silicate hydrolyzate liquid;
Described refractory material any or multiple in refining quartz, vitreous silica, gangue, corundum, zirconium English, the brown corundum;
Described coagulant is: basic anhydride or organic amine;
(4) grouting is shaped in wax-pattern
The slurry of step (3) preparation is poured into deep trouth, the blind hole place of the wax-pattern of step (2) preparation;
After treating that slurry solidifies in the wax-pattern, promptly directly make the narrow groove of wax-pattern, the core in the blind hole.
The present invention is according to the foundry goods requirement, and system wax-pattern die mould is pressed into die mould with wax material, makes the wax-pattern of deep trouth, blind hole; The slurry of preparation is poured into and solidifies the core that promptly directly makes with the foundry goods of narrow groove, blind hole in the wax-pattern.Be a kind of new quick manufacturing mold core method, can finish, be about to core molding material preparation pulping, pour in the wax-pattern, directly form core in the wax-pattern in pattern shop.After having made core, again by system running gate system commonly used, the group wax tree, steps such as system shell are made required foundry goods with narrow groove, blind hole.Fig. 1 is that several need use the model casting of core to comprise the schematic flow sheet of technologies such as coremaking, molding, system shell, and wherein solid box is the manufacturing mold core part, in order to strengthen the contrast intuitive, has comprised flow process of the present invention in the schematic diagram.As can be seen from Figure 1:
1. prefabricated core method need be made core mold, high temperature sintering etc., and many, the big energy-consuming of equipment, cost height are grown, needed to the time; Defectives such as core fractures, displacement easily take place when compacting wax-pattern, cast.
2. irritate the sand method again after making 1～2 stratotype shell, floating sand all need be disclosed one by one by pore and narrow groove place, and each wax-pattern also not all is beneficial in the position of module tree and discloses the hole and irritate the sand operation again; And when making behind 1～2 layer of shell, internal diameter is littler, and the difficulty of irritating sand is bigger; Shell herein (promptly being equivalent to core) intensity is low, easily runs away during cast, and cleaning is difficulty quite.
3. direct manufacturing mold core method in the narrow groove at wax-pattern of the present invention, the blind hole, before wax-pattern group tree, assemble the forward direction deep trouth at wax-pattern earlier, blind holes etc. are located the slurry that filling is added with coagulant, i.e. the first shell at the narrow groove of system, blind hole place, do not need Special Equipment, energy-conservation, cost is low, with short production cycle.
The advantage that the present invention has:
1) quick manufacturing mold core method, the used raw material of core slurry are the used raw material of model casting system shell except coagulant, and are free from environmental pollution; And can heat release not have variations in temperature during the slurry gelling, can not make the wax-pattern distortion, guarantee the dimensional accuracy of foundry goods; If select for use when strengthening rapidly-dried silica sol, core is removed easily in the foundry goods.
2) pattern shop can join slurry very easily, be in the milk in wax-pattern.Treat promptly to make core after the slurry gelling in the wax-pattern, can organize tree, system shell after 2～4 hours.
3) this manufacturing mold core production method simply, does not need special equipment, energy-conservation, and production cost is low, shorten the production cycle greatly, has a extensive future.If 1/3 unit wherein adopts this this method, economic benefit is also very considerable, have a extensive future in the whole nation nearly 2000 model casting factories, the company.
Description of drawings
Fig. 1 is that several need use the model casting of core to comprise the schematic flow sheet of technologies such as coremaking, molding, system shell, and wherein solid box is the manufacturing mold core part, in order to strengthen the contrast intuitive, has comprised flow process of the present invention in the schematic diagram.
Fig. 2 is a schematic flow sheet of the present invention.
The specific embodiment
Specify the present invention below in conjunction with accompanying drawing by embodiment.
Fig. 2 is a schematic flow sheet of the present invention.According to the foundry goods requirement, system wax-pattern die mould; Wax material is pressed into die mould, makes the wax-pattern of deep trouth, blind hole; Pulp preparation also pours into the slurry of preparation to solidify the core that promptly directly makes with the foundry goods of narrow groove, blind hole in the above-mentioned wax-pattern.It is a kind of new quick manufacturing mold core method.
Embodiment 1
Direct manufacturing mold core method in a kind of narrow groove, the blind hole at wax-pattern, this method may further comprise the steps:
(1) system wax-pattern die mould
According to the foundry goods requirement, design, manufacturing wax-pattern die mould;
(2) system wax-pattern
Wax material is pressed into the described wax-pattern die mould of step (1), makes the wax-pattern of deep trouth, blind hole;
(3) pulp preparation
Add raw material blending according to each mass unit proportioning in proper order by binding agent, surfactant, refractory material, defoamer, coagulant and prepare slurry; Its addition is: adhesive silicon sol 100g, refractory material vitreous silica 200g, coagulant organic acid 0.1g, surfactant fatty alcohol polyoxy ethylether (JFC) 0.3g, defoamer silicone defoaming agent 0.2g;
(4) grouting is shaped in wax-pattern
The slurry of step (3) preparation is poured into deep trouth, the blind hole place of the wax-pattern of step (2) preparation; After treating that slurry solidifies in the wax-pattern, promptly directly make the narrow groove of wax-pattern, the core in the blind hole.
Embodiment 2
Direct manufacturing mold core method in a kind of narrow groove, the blind hole at wax-pattern, this method may further comprise the steps:
(1) system wax-pattern die mould
According to the foundry goods requirement, design, manufacturing wax-pattern die mould;
(2) system wax-pattern
Wax material is pressed into the described wax-pattern die mould of step (1), makes the wax-pattern of deep trouth, blind hole;
(3) pulp preparation
Add raw material blending according to each mass unit proportioning in proper order by binding agent, surfactant, refractory material, defoamer, coagulant and prepare slurry; Its addition is: water glass of binder 100g, refractory material quartzy 50g, gangue 70g, coagulant acid 0.1g, surfactant fatty alcohol polyoxy ethylether (JFC) 0.2g, defoamer silicone defoaming agent 0.3g
(4) grouting is shaped in wax-pattern
The slurry of step (3) preparation is poured into deep trouth, the blind hole place of the wax-pattern of step (2) preparation; After treating that slurry solidifies in the wax-pattern, promptly directly make the narrow groove of wax-pattern, the core in the blind hole.
Embodiment 3
Direct manufacturing mold core method in a kind of narrow groove, the blind hole at wax-pattern, this method may further comprise the steps:
(1) system wax-pattern die mould
According to the foundry goods requirement, design, manufacturing wax-pattern die mould;
(2) system wax-pattern
Wax material is pressed into the described wax-pattern die mould of step (1), makes the wax-pattern of deep trouth, blind hole;
(3) pulp preparation
Add raw material blending according to each quality proportioning in proper order by binding agent, refractory material, coagulant and prepare slurry; Its addition is: binding agent silicate hydrolyzate liquid 100g, refractory material corundum 300g, coagulant hydramine 2g;
(4) core is made in grouting in wax-pattern
The slurry of step (3) preparation is poured into deep trouth, the blind hole place of the wax-pattern of step (2) preparation; After treating that slurry solidifies in the wax-pattern, promptly directly make the narrow groove of wax-pattern, the core in the blind hole.
More embodiment see the following form (table 1):
Table 1:(unit: gram)
Claims (2)
1, direct manufacturing mold core method in a kind of narrow groove at wax-pattern, the blind hole is characterized in that this method may further comprise the steps:
(1) system wax-pattern die mould
According to the foundry goods requirement, design, manufacturing wax-pattern die mould;
(2) system wax-pattern
Wax material is pressed into the described wax-pattern die mould of step (1), makes the wax-pattern of deep trouth, blind hole;
(3) pulp preparation
Add raw material blending according to each mass unit proportioning in proper order by binding agent, surfactant, refractory material, defoamer, coagulant and prepare slurry;
Binding agent: refractory material: coagulant: surfactant: defoamer=100: (100～400): (0.1～10): (0.1～0.3): (0.1～0.3);
Described binding agent is Ludox, strengthen any in rapidly-dried silica sol, waterglass, the aluminium dihydrogen phosphate;
Described refractory material any or multiple in refining quartz, vitreous silica, gangue, corundum, zirconium English, the brown corundum;
Described surfactant is that fatty alcohol polyoxy ethylether, sodium alkyl sulfonate are any;
Described defoamer is a silicone defoaming agent;
Described coagulant is any or multiple in acid, ackd salt, organic acid, the alcohols;
(4) grouting is shaped in wax-pattern
The slurry of step (3) preparation is poured into deep trouth, the blind hole place of the wax-pattern of step (2) preparation;
After treating that slurry solidifies in the wax-pattern, promptly directly make the narrow groove of wax-pattern, the core in the blind hole.
2, direct manufacturing mold core method in a kind of narrow groove at wax-pattern, the blind hole is characterized in that this method may further comprise the steps:
(1) system wax-pattern die mould
According to the foundry goods requirement, design, manufacturing wax-pattern die mould;
(2) system wax-pattern
Wax material is pressed into the described wax-pattern die mould of step (1), makes the wax-pattern that is not surrounded by core;
(3) pulp preparation
Add raw material blending according to each quality proportioning in proper order by binding agent, refractory material, coagulant and prepare slurry;
Binding agent: refractory material: coagulant=100: (100～400): (0.1～10);
Described binding agent silicate hydrolyzate liquid;
Described refractory material any or multiple in refining quartz, vitreous silica, gangue, corundum, zirconium English, the brown corundum;
Described coagulant is: basic anhydride or organic amine;
(4) core is made in grouting in wax-pattern
The slurry of step (3) preparation is poured into deep trouth, the blind hole place of the wax-pattern of step (2) preparation;
After treating that slurry solidifies in the wax-pattern, promptly directly make the narrow groove of wax-pattern, the core in the blind hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610011679XA CN100506428C (en) | 2006-04-14 | 2006-04-14 | Method for direct production of core in narrow groove and blind hole of wax mould |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610011679XA CN100506428C (en) | 2006-04-14 | 2006-04-14 | Method for direct production of core in narrow groove and blind hole of wax mould |
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| Publication Number | Publication Date |
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| CN1827256A true CN1827256A (en) | 2006-09-06 |
| CN100506428C CN100506428C (en) | 2009-07-01 |
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| CNB200610011679XA Expired - Fee Related CN100506428C (en) | 2006-04-14 | 2006-04-14 | Method for direct production of core in narrow groove and blind hole of wax mould |
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Cited By (17)
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| CN101480697B (en) * | 2008-01-11 | 2011-04-20 | 上海中洲特种合金材料有限公司 | Case-making method of silicasol investment casting with elongated hole structure |
| CN102773412A (en) * | 2012-08-16 | 2012-11-14 | 安徽应流集团霍山铸造有限公司 | Shell making method for deep blind hole of precision casting |
| CN103192024A (en) * | 2013-04-01 | 2013-07-10 | 无锡环宇精密铸造有限公司 | Preparation method of mixed binder of water glass and silicasol |
| CN104190855A (en) * | 2014-06-19 | 2014-12-10 | 泊头市宏昌机械有限责任公司 | Zircon-sand mullite-sand mold core used for silica sol precision casting and manufacturing method thereof |
| CN104190861A (en) * | 2014-09-15 | 2014-12-10 | 内蒙古第一机械集团有限公司 | Investment precoat for making shell in investment casting |
| CN104399878A (en) * | 2014-11-28 | 2015-03-11 | 柳州金特机械有限公司 | Wax pressing table |
| CN104550729A (en) * | 2014-07-28 | 2015-04-29 | 霍山瑞精铸业有限公司 | Sand mold forming casting process |
| CN104607591A (en) * | 2015-01-16 | 2015-05-13 | 青岛新诺科铸造材料科技有限公司 | Quick-drying silica sol and preparation method thereof |
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| CN108145095A (en) * | 2017-12-27 | 2018-06-12 | 安徽应流航源动力科技有限公司 | A kind of process for making shell of complexity deep groove structure precision castings |
| CN109317615A (en) * | 2018-11-23 | 2019-02-12 | 安徽应流航源动力科技有限公司 | A kind of grouting process for making shell of deep groove structure precision castings |
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| CN101480697B (en) * | 2008-01-11 | 2011-04-20 | 上海中洲特种合金材料有限公司 | Case-making method of silicasol investment casting with elongated hole structure |
| CN102773412A (en) * | 2012-08-16 | 2012-11-14 | 安徽应流集团霍山铸造有限公司 | Shell making method for deep blind hole of precision casting |
| CN103192024A (en) * | 2013-04-01 | 2013-07-10 | 无锡环宇精密铸造有限公司 | Preparation method of mixed binder of water glass and silicasol |
| CN104190855A (en) * | 2014-06-19 | 2014-12-10 | 泊头市宏昌机械有限责任公司 | Zircon-sand mullite-sand mold core used for silica sol precision casting and manufacturing method thereof |
| CN104550729A (en) * | 2014-07-28 | 2015-04-29 | 霍山瑞精铸业有限公司 | Sand mold forming casting process |
| CN104190861A (en) * | 2014-09-15 | 2014-12-10 | 内蒙古第一机械集团有限公司 | Investment precoat for making shell in investment casting |
| CN104399878A (en) * | 2014-11-28 | 2015-03-11 | 柳州金特机械有限公司 | Wax pressing table |
| CN104607591A (en) * | 2015-01-16 | 2015-05-13 | 青岛新诺科铸造材料科技有限公司 | Quick-drying silica sol and preparation method thereof |
| CN105414484A (en) * | 2015-11-24 | 2016-03-23 | 怀宁县群力汽车配件有限公司 | Fired mold precise casting technology for producing automobile H-shaped front shaft |
| CN108145095A (en) * | 2017-12-27 | 2018-06-12 | 安徽应流航源动力科技有限公司 | A kind of process for making shell of complexity deep groove structure precision castings |
| CN109317615A (en) * | 2018-11-23 | 2019-02-12 | 安徽应流航源动力科技有限公司 | A kind of grouting process for making shell of deep groove structure precision castings |
| CN110625065A (en) * | 2019-10-15 | 2019-12-31 | 张家港市华泰泵阀制造有限公司 | Method for directly casting hole on Cr28 casting |
| CN110722104A (en) * | 2019-11-26 | 2020-01-24 | 温州万虹阀门有限公司 | Precision casting process of small-diameter deep-hole valve joint |
| CN111168007A (en) * | 2020-01-20 | 2020-05-19 | 江苏中超航宇精铸科技有限公司 | Method for manufacturing formwork with cavity structure |
| CN112170780A (en) * | 2020-09-23 | 2021-01-05 | 鹰普（中国）有限公司 | Machining process for casting with double-layer structure |
| CN114260999A (en) * | 2021-12-31 | 2022-04-01 | 江苏永瀚特种合金技术股份有限公司 | Method for increasing strength of weak part of large-scale oriented single crystal ceramic by embedding platinum wire |
| CN116532614A (en) * | 2023-04-12 | 2023-08-04 | 无锡环宇精密铸造有限公司 | Mold core for precision casting and preparation method thereof |
| CN116532614B (en) * | 2023-04-12 | 2024-04-05 | 无锡环宇精密铸造有限公司 | Mold core for precision casting and preparation method thereof |
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