CN101301677A - Method for quickly and precisely casting complex parts - Google Patents
Method for quickly and precisely casting complex parts Download PDFInfo
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- CN101301677A CN101301677A CNA2008100183628A CN200810018362A CN101301677A CN 101301677 A CN101301677 A CN 101301677A CN A2008100183628 A CNA2008100183628 A CN A2008100183628A CN 200810018362 A CN200810018362 A CN 200810018362A CN 101301677 A CN101301677 A CN 101301677A
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Abstract
The invention provides a quick precision casting method for complex parts. The method uses a photosensitivity rapid prototyping technique to prepare a resin part prototype, a pouring system resin prototype and a resin process die shell which are then combined together to form a die; the method uses a gel-casting processing technique to pour ceramic slurries with high solid-phase and low viscosity into the die cavity so as to form a ceramic casting blank by quick in-situ solidification; the ceramic casting blank is dried and the resin prototype is burned and sintered to obtain the ceramic casting which contains the downsprue; finally, high-temperature metal liquid is poured into the ceramic casting; after being cooled, the ceramic casting is mechanically destroyed to obtain the precision casting. The method requires no manufacturing of metal dies, uses the ceramic casting prototyping which has high efficiency, good precision and short production period, and is especially suitable for the quick manufacture of middle and small batches and the trial-manufacture of new products in the precision castings with complex shapes.
Description
Technical field
The present invention relates to the precision-investment casting field, be specifically related to a kind of method for quickly and precisely casting complex parts based on photocureable rapid shaping technology and gel casting process.
Background technology
Precision-investment casting is a kind of casting technique of cutting less or not having cutting, is the technology of an excellence in the casting industry, and its application is very extensive.The preparation of ceramic shell is important step during model casting is produced, and it is to obtain by being coated with the extension ceramic size repeatedly in advance prefabricated fusible pattern (being generally wax-pattern) surface.In order to prepare fusible pattern, need design and make special-purpose metal die, for some complex-shaped foundry goods, the design of metal die and cost of manufacture height, the cycle is long, and difficulty is big.
The RP technology is a kind of Rapid tooling that develops rapidly over past ten years.It adopts the material accumulation principle, converts cad model to three-dimensional entity model.SLA (sl prototype technology), FDM (melt deposition manufacturing), SLS (selective laser sintering technology), LOM (laminated solid body manufacturing) business system etc. are arranged at present.The RP technology successfully is applied in the model casting production, and various RP technology can produce " fusible pattern " of model casting fast, manufacture and design thereby save metal die, have shortened the production cycle.As: the wax-pattern that FDM and SLS directly make, the papery fusible pattern of LOM, the resin fusible pattern of SLA and the plastics mould of SLS all can substitute traditional wax-pattern, are used for hot investment casting.The resin fusible pattern dimensional accuracy height that SLA makes, surface roughness is low, the most suitable alternative fusible pattern.
At present, adopt to be coated with the complexity that the process for making shell of hanging ceramic size has limited foundry goods to a certain extent repeatedly, for example features such as the aperture on fusible pattern surface, deep trouth are difficult to duplicate, and simultaneous type casing forming efficient is not high, and the system shell cycle is long.Though adopt grouting method such as plaster casting and ceramic mold casting can guarantee the casting mold disposal molding, system shell efficient height has needed modulo operation, and complex-shaped casting mold also is difficult to make.
Gel casting process is a kind of advanced ceramics forming technique that development in recent years is got up, and by U.S.'s Oak Ridge National Laboratory invention, has been widely used in the manufacturing of various ceramic members.This technology is based upon on the basis of traditional ceramics forming technique and polymer chemistry theory, and its core is to use the organic monomer polymerisation in solution to become the gel of the polymer-solvent of high-intensity, horizontal connection.Be mixed in by ceramic powder in the solution of organic monomer in the formed slurry cast progressive die tool, the organic monomer polymerization reaction take place forms the parts of gelling with the ceramic powder in-situ solidifying therein.Water base ceramic size good moldability in the gel casting process can be used for making the ceramic component of complicated shape, near net-shape, is particularly suitable for the preparation of complicated tiny ceramic member.The present invention has utilized this advantage of gel casting process just, has realized the near-net-shape of complicated ceramic-mould.
Summary of the invention
The present invention proposes a kind of method for quickly and precisely casting complex parts, this method need not to make metal die, ceramic-mould shaping efficiency height, and precision is good, with short production cycle, be particularly suitable for the complicated shape precision casting in, small lot is made fast and the trial-production of new product.
For achieving the above object, the present invention adopts technical scheme to be:
1) the quick preparation of resin die
The applying three-dimensional modeling software is taken out shell to the threedimensional model of the part of needs preparation and is handled, and solid part is taken out be hollow parts, takes out the thick 0.6～3mm of being of shell wall, utilizes light-curing rapid forming equipment then, produces the part resin pattern;
Utilize light-curing rapid forming equipment, produce the resin-cast system prototype;
Utilize light-curing rapid forming equipment to make the resin formwork of an outline greater than an end opening of resin pattern, resin pattern, running gate system and resin formwork are fitted together the formation resin die, wherein the distance between resin pattern and the resin formwork is 5～10mm, is used to fill ceramic size and forms casting mold;
2) dispose high solid phase, low viscosity ceramic size
A, batching: removing ionized water or distilled water, is 50%～60% to get the ceramic powder that particle diameter is 1～500 μ m according to solid volume fraction;
Organic monomer and the crosslinking agent mass ratio by 10: 1～30: 1 is mixed, its addition is 10～30% of a water weight, organic monomer is water soluble propene's acid amides or Methacrylamide, and crosslinking agent is N, N '-methylene-bisacrylamide or many ethyleneglycol dimethacrylates;
Get polyacrylate, poly-methyl acrylate, hydroxy acid salt or citrate as dispersant, its addition is 0.5～2.0% of a ceramic powder weight;
Taking polyethylene glycol is as plasticizer, and its addition is 1～5% of a ceramic powder weight;
B, mixing and ball milling: mixture, dispersant and the plasticizer of organic monomer and crosslinking agent are joined in deionized water or the distilled water, regulating the pH value is 9-10, and then the adding ceramic powder stirs, put into the ball mill ball milling at last, the ball milling time is 2～30h, ratio of grinding media to material is 1: 1～2: 1, forms ceramic size;
C, degasification: ceramic size is carried out vacuum stirring or vibration degasification;
D, adding initator and catalyst: add the initiator ammonium persulfate aqueous solution and catalyst tetramethylethylenediamine in the ceramic size after the vacuum stirring degasification, and stir, wherein the addition of initator is 0.2%～2% of an organic monomer quality, and the addition of catalyst is 0.02～0.1% of an organic monomer quality;
3) gel casting forming: ceramic size is cast in the cavity between resin fusible pattern and the resin formwork natural gelation;
4) drying: after treating ceramic slurry gelization, place it in 10 ℃～40 ℃, relative humidity is carried out drying more than 90%;
5) roasting: after treating the ceramic-mould drying, put it in the roaster, rise to 300 ℃ from room temperature with the heating rate of 5-10 ℃/h, heating rate with 100 ℃/h is warming up to 1500 ℃ from 300 ℃ again, 1550 ℃ of insulations 3 hours, behind sintering, finally obtain complete ceramic-mould;
6) hot investment casting moulding:
At last, the pouring liquid metal after cooling, obtains final precision casting.
Prefabricated some holes that are used to discharge unnecessary resin, resin fusible pattern of the present invention surface; Ceramic powder is one or more the mixture in electro-corundum, silica, zirconia or the mullite.
The present invention utilizes photocureable rapid shaping to produce complex-shaped resin fusible pattern, utilizes gel casting process to mold corresponding complicated ceramic-mould, and last casting metal obtains precision casting.Need not metal die and just can realize the preparation of any complicated shape fusible pattern, shortened life cycle of the product, reduced cost.In addition, in order to reduce resin fusible pattern expansion power to shell in roasting process, need take out shell to it and handle, to avoid with the shell spalling.
Description of drawings
Fig. 1 process chart of the present invention;
Fig. 2 is the vertical view and the profile of impeller;
Fig. 3 is the assembling plan view of impeller fusible pattern and technology formwork.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Embodiment 1, referring to Fig. 1, and 2,3, impeller shown in Figure 2 has complicated curve form, and the distance between blade and the blade is very narrow, and its die mould is difficult to design, therefore makes relatively difficulty, and utilizes the technology that proposes among the present invention to address this problem well.Concrete implementation step is as follows:
1) preparation of resin fusible pattern: the applying three-dimensional modeling software is taken out shell to the threedimensional model of impeller shown in Figure 2 and is handled, and solid part is taken out be hollow parts, takes out the thick 0.6mm of being of shell wall, utilizes light-curing rapid forming equipment then, produces the part resin pattern; Prefabricated some holes that are used to discharge unnecessary resin, resin pattern surface;
Utilize light-curing rapid forming equipment, produce the resin-cast system prototype;
Utilize light-curing rapid forming equipment to make the resin formwork of an outline greater than an end opening of resin pattern, resin pattern, running gate system and resin formwork are fitted together the formation resin die, wherein the distance between resin pattern and the resin formwork is 8mm, is used to fill ceramic size and forms casting mold (as Fig. 3);
2) dispose high solid phase, low viscosity ceramic size
A, batching: removing ionized water or distilled water, is 50% to get the ceramic powder electro-corundum that particle diameter is 1～500 μ m according to solid volume fraction;
Organic monomer and the crosslinking agent mass ratio by 10: 1 is mixed, and its addition is 20% of a water weight, and organic monomer is water soluble propene's acid amides, and crosslinking agent is N, N '-methylene-bisacrylamide or;
Get polyacrylate as dispersant, its addition is 2% of a ceramic powder weight;
Taking polyethylene glycol is as plasticizer, and its addition is 5 of a ceramic powder weight;
B, mixing and ball milling: mixture, dispersant and the plasticizer of organic monomer and crosslinking agent are joined in deionized water or the distilled water, regulating the pH value is 9, and then the adding ceramic powder stirs, put into the ball mill ball milling at last, the ball milling time is 30h, ratio of grinding media to material is 1: 1, forms ceramic size;
C, degasification: ceramic size is carried out vacuum stirring or vibration degasification;
D, adding initator and catalyst: add the initiator ammonium persulfate aqueous solution and catalyst tetramethylethylenediamine in the ceramic size after the vacuum stirring degasification, and stir, wherein the addition of initator is 2% of an organic monomer quality, and the addition of catalyst is 0.05% of an organic monomer quality;
The ceramic size that finally obtains, viscosity are between 0.2～1Pa.s, and good fluidity has excellent molding process, can satisfy the cast of complicated shape casting mold.
3) gel casting forming:
Ceramic size gravity-assist pouring or vacuum suction in the cavity between resin fusible pattern and resin formwork, also can be poured into a mould while vibrating, guarantee the complete filling mould each several part of slurry energy, behind the casting complete, treat its natural gelation;
4) drying: after treating ceramic slurry gelization, place it in 10 ℃, relative humidity is carried out drying more than 90%;
5) roasting: after treating the ceramic-mould drying, put it in the roaster, rise to 300 ℃ from room temperature with the heating rate of 8 ℃/h, heating rate with 100 ℃/h is warming up to 1500 ℃ from 300 ℃ again, 1550 ℃ of insulations 3 hours, behind sintering, finally obtain complete ceramic-mould;
6) hot investment casting moulding:
Last pouring liquid stainless steel obtains qualified impeller precision casting.
Embodiment 2,1) the quick preparation of resin die
The applying three-dimensional modeling software is taken out shell to the threedimensional model of the part of needs preparation and is handled, and solid part is taken out be hollow parts, takes out the thick 1mm of being of shell wall, utilizes light-curing rapid forming equipment then, produces the part resin pattern;
Utilize light-curing rapid forming equipment, produce the resin-cast system prototype;
Utilize light-curing rapid forming equipment to make the resin formwork of an outline greater than an end opening of resin pattern, resin pattern, running gate system and resin formwork are fitted together the formation resin die, wherein the distance between resin pattern and the resin formwork is 10mm, is used to fill ceramic size and forms casting mold;
2) dispose high solid phase, low viscosity ceramic size
A, batching: removing ionized water or distilled water, is 58% to get the ceramic powder silica that particle diameter is 1～500 μ m according to solid volume fraction;
Organic monomer and the crosslinking agent mass ratio by 20: 1 is mixed, and its addition is 15% of a water weight, and organic monomer is water-soluble Methacrylamide, and crosslinking agent is many ethyleneglycol dimethacrylates;
Get poly-methyl acrylate as dispersant, its addition is 1.5% of a ceramic powder weight;
Taking polyethylene glycol is as plasticizer, and its addition is 3% of a ceramic powder weight;
B, mixing and ball milling: mixture, dispersant and the plasticizer of organic monomer and crosslinking agent are joined in deionized water or the distilled water, regulating the pH value is 10, and then the adding ceramic powder stirs, put into the ball mill ball milling at last, the ball milling time is 15h, ratio of grinding media to material is 1.5: 1, forms ceramic size;
C, degasification: ceramic size is carried out vacuum stirring or vibration degasification;
D, adding initator and catalyst: add the initiator ammonium persulfate aqueous solution and catalyst tetramethylethylenediamine in the ceramic size after the vacuum stirring degasification, and stir, wherein the addition of initator is 1.5% of an organic monomer quality, and the addition of catalyst is 0.1% of an organic monomer quality;
The ceramic size that finally obtains, viscosity are between 0.2～1Pa.s, and good fluidity has excellent molding process, can satisfy the cast of complicated shape casting mold.
3) gel casting forming:
Ceramic size gravity-assist pouring or vacuum suction in the cavity between resin fusible pattern and resin formwork, also can be poured into a mould while vibrating, guarantee the complete filling mould each several part of slurry energy, behind the casting complete, treat its natural gelation;
4) drying: after treating ceramic slurry gelization, place it in 20 ℃, relative humidity is carried out drying more than 90%;
5) roasting: after treating the ceramic-mould drying, put it in the roaster, rise to 300 ℃ from room temperature with the heating rate of 6 ℃/h, heating rate with 100 ℃/h is warming up to 1500 ℃ from 300 ℃ again, 1550 ℃ of insulations 3 hours, behind sintering, finally obtain complete ceramic-mould;
6) hot investment casting moulding:
At last, the pouring liquid metal after cooling, obtains final precision casting.
Embodiment 3,1) the quick preparation of resin die
The applying three-dimensional modeling software is taken out shell to the threedimensional model of the part of needs preparation and is handled, and solid part is taken out be hollow parts, takes out the thick 1.5mm of being of shell wall, utilizes light-curing rapid forming equipment then, produces the part resin pattern;
Utilize light-curing rapid forming equipment, produce the resin-cast system prototype;
Utilize light-curing rapid forming equipment to make the resin formwork of an outline greater than an end opening of resin pattern, resin pattern, running gate system and resin formwork are fitted together the formation resin die, wherein the distance between resin pattern and the resin formwork is 10mm, is used to fill ceramic size and forms casting mold;
2) dispose high solid phase, low viscosity ceramic size
A, batching: removing ionized water or distilled water, is 52% to get the ceramic powder zirconia that particle diameter is 1～500 μ m according to solid volume fraction;
Organic monomer and the crosslinking agent mass ratio by 15: 1 is mixed, and its addition is 30% of a water weight, and organic monomer is water soluble propene's acid amides, and crosslinking agent is N, N '-methylene-bisacrylamide;
Get hydroxy acid salt as dispersant, its addition is 1% of a ceramic powder weight;
Taking polyethylene glycol is as plasticizer, and its addition is 1% of a ceramic powder weight;
B, mixing and ball milling: mixture, dispersant and the plasticizer of organic monomer and crosslinking agent are joined in deionized water or the distilled water, regulating the pH value is 9.5, and then the adding ceramic powder stirs, put into the ball mill ball milling at last, the ball milling time is 2h, ratio of grinding media to material is 2: 1, forms ceramic size;
C, degasification: ceramic size is carried out vacuum stirring or vibration degasification;
D, adding initator and catalyst: add the initiator ammonium persulfate aqueous solution and catalyst tetramethylethylenediamine in the ceramic size after the vacuum stirring degasification, and stir, wherein the addition of initator is 1% of an organic monomer quality, and the addition of catalyst is 0.07% of an organic monomer quality;
The ceramic size that finally obtains, viscosity are between 0.2～1Pa.s, and good fluidity has excellent molding process, can satisfy the cast of complicated shape casting mold.
3) gel casting forming:
Ceramic size gravity-assist pouring or vacuum suction in the cavity between resin fusible pattern and resin formwork, also can be poured into a mould while vibrating, guarantee the complete filling mould each several part of slurry energy, behind the casting complete, treat its natural gelation;
4) drying: after treating ceramic slurry gelization, place it in 30 ℃, relative humidity is carried out drying more than 90%;
5) roasting: after treating the ceramic-mould drying, put it in the roaster, rise to 300 ℃ from room temperature with the heating rate of 9 ℃/h, heating rate with 100 ℃/h is warming up to 1500 ℃ from 300 ℃ again, 1550 ℃ of insulations 3 hours, behind sintering, finally obtain complete ceramic-mould;
6) hot investment casting moulding:
At last, the pouring liquid metal after cooling, obtains final precision casting.
Embodiment 4,1) the quick preparation of resin die
The applying three-dimensional modeling software is taken out shell to the threedimensional model of the part of needs preparation and is handled, and solid part is taken out be hollow parts, takes out the thick 3mm of being of shell wall, utilizes light-curing rapid forming equipment then, produces the part resin pattern;
Utilize light-curing rapid forming equipment, produce the resin-cast system prototype;
Utilize light-curing rapid forming equipment to make the resin formwork of an outline greater than an end opening of resin pattern, resin pattern, running gate system and resin formwork are fitted together the formation resin die, wherein the distance between resin pattern and the resin formwork is 5mm, is used to fill ceramic size and forms casting mold;
2) dispose high solid phase, low viscosity ceramic size
A, batching: removing ionized water or distilled water, is 55% to get the ceramic powder mullite that particle diameter is 1～500 μ m according to solid volume fraction;
Organic monomer and the crosslinking agent mass ratio by 30: 1 is mixed, and its addition is 10% of a water weight, and organic monomer is water-soluble Methacrylamide, and crosslinking agent is many ethyleneglycol dimethacrylates;
Get citrate as dispersant, its addition is 0.5% of a ceramic powder weight;
Taking polyethylene glycol is as plasticizer, and its addition is 4% of a ceramic powder weight;
B, mixing and ball milling: mixture, dispersant and the plasticizer of organic monomer and crosslinking agent are joined in deionized water or the distilled water, regulating the pH value is 10, and then the adding ceramic powder stirs, put into the ball mill ball milling at last, the ball milling time is 10h, ratio of grinding media to material is 2: 1, forms ceramic size;
C, degasification: ceramic size is carried out vacuum stirring or vibration degasification;
D, adding initator and catalyst: add the initiator ammonium persulfate aqueous solution and catalyst tetramethylethylenediamine in the ceramic size after the vacuum stirring degasification, and stir, wherein the addition of initator is 1.3% of an organic monomer quality, and the addition of catalyst is 0.02% of an organic monomer quality;
The ceramic size that finally obtains, viscosity are between 0.2～1Pa.s, and good fluidity has excellent molding process, can satisfy the cast of complicated shape casting mold.
3) gel casting forming:
Ceramic size gravity-assist pouring or vacuum suction in the cavity between resin fusible pattern and resin formwork, also can be poured into a mould while vibrating, guarantee the complete filling mould each several part of slurry energy, behind the casting complete, treat its natural gelation;
4) drying: after treating ceramic slurry gelization, place it in 40 ℃, relative humidity is carried out drying more than 90%;
5) roasting: after treating the ceramic-mould drying, put it in the roaster, rise to 300 ℃ from room temperature with intensification 5 speed of 5 ℃/h, heating rate with 100 ℃/h is warming up to 1500 ℃ from 300 ℃ again, 1550 ℃ of insulations 3 hours, behind sintering, finally obtain complete ceramic-mould;
6) hot investment casting moulding:
At last, the pouring liquid metal after cooling, obtains final precision casting.
Embodiment 5,1) the quick preparation of resin die
The applying three-dimensional modeling software is taken out shell to the threedimensional model of the part of needs preparation and is handled, and solid part is taken out be hollow parts, takes out the thick 2mm of being of shell wall, utilizes light-curing rapid forming equipment then, produces the part resin pattern;
Utilize light-curing rapid forming equipment, produce the resin-cast system prototype;
Utilize light-curing rapid forming equipment to make the resin formwork of an outline greater than an end opening of resin pattern, resin pattern, running gate system and resin formwork are fitted together the formation resin die, wherein the distance between resin pattern and the resin formwork is 10mm, is used to fill ceramic size and forms casting mold;
2) dispose high solid phase, low viscosity ceramic size
A, batching: removing ionized water or distilled water, is 60% to get the ceramic powder electro-corundum that particle diameter is 1～500 μ m and the mixture of silica according to solid volume fraction;
Organic monomer and the crosslinking agent mass ratio by 25: 1 is mixed, and its addition is 25% of a water weight, and organic monomer is water soluble propene's acid amides, and crosslinking agent is many ethyleneglycol dimethacrylates;
Get poly-methyl acrylate as dispersant, its addition is 1.8% of a ceramic powder weight;
Taking polyethylene glycol is as plasticizer, and its addition is 2% of a ceramic powder weight;
B, mixing and ball milling: mixture, dispersant and the plasticizer of organic monomer and crosslinking agent are joined in deionized water or the distilled water, regulating the pH value is 9, and then the adding ceramic powder stirs, put into the ball mill ball milling at last, the ball milling time is 25h, ratio of grinding media to material is 1: 1, forms ceramic size;
C, degasification: ceramic size is carried out vacuum stirring or vibration degasification;
D, adding initator and catalyst: add the initiator ammonium persulfate aqueous solution and catalyst tetramethylethylenediamine in the ceramic size after the vacuum stirring degasification, and stir, wherein the addition of initator is 0.2% of an organic monomer quality, and the addition of catalyst is 0.03% of an organic monomer quality;
The ceramic size that finally obtains, viscosity are between 0.2～1Pa.s, and good fluidity has excellent molding process, can satisfy the cast of complicated shape casting mold.
3) gel casting forming:
Ceramic size gravity-assist pouring or vacuum suction in the cavity between resin fusible pattern and resin formwork, also can be poured into a mould while vibrating, guarantee the complete filling mould each several part of slurry energy, behind the casting complete, treat its natural gelation;
4) drying: after treating ceramic slurry gelization, place it in 25 ℃, relative humidity is carried out drying more than 90%;
5) roasting: after treating the ceramic-mould drying, put it in the roaster, rise to 300 ℃ from room temperature with the heating rate of 7 ℃/h, heating rate with 100 ℃/h is warming up to 1500 ℃ from 300 ℃ again, 1550 ℃ of insulations 3 hours, behind sintering, finally obtain complete ceramic-mould;
6) hot investment casting moulding:
At last, the pouring liquid metal after cooling, obtains final precision casting.
Embodiment 6,1) the quick preparation of resin die
The applying three-dimensional modeling software is taken out shell to the threedimensional model of the part of needs preparation and is handled, and solid part is taken out be hollow parts, takes out the thick 3mm of being of shell wall, utilizes light-curing rapid forming equipment then, produces the part resin pattern;
Utilize light-curing rapid forming equipment, produce the resin-cast system prototype;
Utilize light-curing rapid forming equipment to make the resin formwork of an outline greater than an end opening of resin pattern, resin pattern, running gate system and resin formwork are fitted together the formation resin die, wherein the distance between resin pattern and the resin formwork is 10mm, is used to fill ceramic size and forms casting mold;
2) dispose high solid phase, low viscosity ceramic size
A, batching: removing ionized water or distilled water, is 54% to get ceramic powder electro-corundum, silica and the zirconic mixture that particle diameter is 1～500 μ m according to solid volume fraction;
Organic monomer and the crosslinking agent mass ratio by 10: 1 is mixed, and its addition is 30% of a water weight, and organic monomer is water-soluble Methacrylamide, and crosslinking agent is N, N '-methylene-bisacrylamide;
Get hydroxy acid salt as dispersant, its addition is 1.3% of a ceramic powder weight;
Taking polyethylene glycol is as plasticizer, and its addition is 2.5% of a ceramic powder weight;
B, mixing and ball milling: mixture, dispersant and the plasticizer of organic monomer and crosslinking agent are joined in deionized water or the distilled water, regulating the pH value is 10, and then the adding ceramic powder stirs, put into the ball mill ball milling at last, the ball milling time is 8h, ratio of grinding media to material is 1.5: 1, forms ceramic size;
C, degasification: ceramic size is carried out vacuum stirring or vibration degasification;
D, adding initator and catalyst: add the initiator ammonium persulfate aqueous solution and catalyst tetramethylethylenediamine in the ceramic size after the vacuum stirring degasification, and stir, wherein the addition of initator is 0.5% of an organic monomer quality, and the addition of catalyst is 0.06% of an organic monomer quality;
The ceramic size that finally obtains, viscosity are between 0.2～1Pa.s, and good fluidity has excellent molding process, can satisfy the cast of complicated shape casting mold.
3) gel casting forming:
Ceramic size gravity-assist pouring or vacuum suction in the cavity between resin fusible pattern and resin formwork, also can be poured into a mould while vibrating, guarantee the complete filling mould each several part of slurry energy, behind the casting complete, treat its natural gelation;
4) drying: after treating ceramic slurry gelization, place it in 35 ℃, relative humidity is carried out drying more than 90%;
5) roasting: after treating the ceramic-mould drying, put it in the roaster, rise to 300 ℃ from room temperature with the heating rate of 10 ℃/h, heating rate with 100 ℃/h is warming up to 1500 ℃ from 300 ℃ again, 1550 ℃ of insulations 3 hours, behind sintering, finally obtain complete ceramic-mould;
6) hot investment casting moulding:
At last, the pouring liquid metal after cooling, obtains final precision casting.
Claims (3)
1, a kind of method for quickly and precisely casting complex parts is characterized in that:
1) the quick preparation of resin die
The applying three-dimensional modeling software is taken out shell to the threedimensional model of the part of needs preparation and is handled, and solid part is taken out be hollow parts, takes out the thick 0.6～3mm of being of shell wall, utilizes light-curing rapid forming equipment then, produces the part resin pattern;
Utilize light-curing rapid forming equipment, produce the resin-cast system prototype;
Utilize light-curing rapid forming equipment to make the resin formwork of an outline greater than an end opening of resin pattern, resin pattern, running gate system and resin formwork are fitted together the formation resin die, wherein the distance between resin pattern and the resin formwork is 5～10mm, is used to fill ceramic size and forms casting mold;
2) dispose high solid phase, low viscosity ceramic size
A, batching: removing ionized water or distilled water, is 50%～60% to get the ceramic powder that particle diameter is 1～500 μ m according to solid volume fraction;
Organic monomer and the crosslinking agent mass ratio by 10: 1～30: 1 is mixed, its addition is 10～30% of a water weight, organic monomer is water soluble propene's acid amides or Methacrylamide, and crosslinking agent is N, N '-methylene-bisacrylamide or many ethyleneglycol dimethacrylates;
Get polyacrylate, poly-methyl acrylate, hydroxy acid salt or citrate as dispersant, its addition is 0.5～2.0% of a ceramic powder weight;
Taking polyethylene glycol is as plasticizer, and its addition is 1～5% of a ceramic powder weight;
B, mixing and ball milling: mixture, dispersant and the plasticizer of organic monomer and crosslinking agent are joined in deionized water or the distilled water, regulating the pH value is 9-10, and then the adding ceramic powder stirs, put into the ball mill ball milling at last, the ball milling time is 2～30h, ratio of grinding media to material is 1: 1～2: 1, forms ceramic size;
C, degasification: ceramic size is carried out vacuum stirring or vibration degasification;
D, adding initator and catalyst: add the initiator ammonium persulfate aqueous solution and catalyst tetramethylethylenediamine in the ceramic size after the vacuum stirring degasification, and stir, wherein the addition of initator is 0.2%～2% of an organic monomer quality, and the addition of catalyst is 0.02～0.1% of an organic monomer quality;
3) gel casting forming: ceramic size is cast in the cavity between resin fusible pattern and the resin formwork natural gelation;
4) drying: after treating ceramic slurry gelization, place it in 10 ℃～40 ℃, relative humidity is carried out drying more than 90%;
5) roasting: after treating the ceramic-mould drying, put it in the roaster, rise to 300 ℃ from room temperature with the heating rate of 5-10 ℃/h, heating rate with 100 ℃/h is warming up to 1500 ℃ from 300 ℃ again, 1550 ℃ of insulations 3 hours, behind sintering, finally obtain complete ceramic-mould;
6) hot investment casting moulding:
At last, the pouring liquid metal after cooling, obtains final precision casting.
2, method for quickly and precisely casting complex parts according to claim 1 is characterized in that: prefabricated some holes that are used to discharge unnecessary resin, said resin pattern surface.
3, method for quickly and precisely casting complex parts according to claim 1 is characterized in that: said ceramic powder is one or more the mixture in electro-corundum, silica, zirconia or the mullite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100183628A CN101301677A (en) | 2008-06-03 | 2008-06-03 | Method for quickly and precisely casting complex parts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100183628A CN101301677A (en) | 2008-06-03 | 2008-06-03 | Method for quickly and precisely casting complex parts |
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| CN101301677A true CN101301677A (en) | 2008-11-12 |
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| CN101966558A (en) * | 2010-09-30 | 2011-02-09 | 安徽应流集团霍山铸造有限公司 | Precision casting method for large castings |
| CN101987347A (en) * | 2010-09-29 | 2011-03-23 | 西安交通大学 | Manufacturing method of core for casting engine exhaust manifold |
| CN102019346A (en) * | 2010-12-30 | 2011-04-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Making method of rapid forming wax pattern of diffuser |
| CN102019347A (en) * | 2010-12-30 | 2011-04-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for making guide vane inner ring by opening process window |
| CN102039375A (en) * | 2010-11-20 | 2011-05-04 | 沈阳工业大学 | Method for quickly manufacturing high-temperature alloy hollow blade casting |
| CN102688988A (en) * | 2012-06-18 | 2012-09-26 | 哈尔滨工业大学 | Micro-investment casting forming method for complex micro-component |
| CN103146166A (en) * | 2013-03-07 | 2013-06-12 | 佛山市浪鲸洁具有限公司 | Forming mold of sanitary product and preparation method thereof |
| CN103172391A (en) * | 2011-12-22 | 2013-06-26 | 辽宁省轻工科学研究院 | Method for manufacturing specially-shaped sprue cup by colloidal forming |
| CN103231025A (en) * | 2013-04-18 | 2013-08-07 | 西安交通大学 | Preparation method of wall thickness controllable directional solidification casting mould |
| CN103240791A (en) * | 2013-04-16 | 2013-08-14 | 西安交通大学 | Ceramic slurry liquidity control method for gel injection molding |
| CN103464690A (en) * | 2013-08-26 | 2013-12-25 | 西安交通大学 | Manufacturing method of ceramic mold of monocrystal turbine blade |
| CN103722127A (en) * | 2013-12-31 | 2014-04-16 | 陕西恒通智能机器有限公司 | Rapid investment casting method based on stereolithography (SL) |
| CN103801658A (en) * | 2014-02-17 | 2014-05-21 | 山东旗开重型机械有限公司 | Manufacturing method of ceramic mold shell |
| CN103979938A (en) * | 2014-04-25 | 2014-08-13 | 上海卫蓝海洋材料科技有限公司 | Deep-sea pressure resistant alumina ceramic hollow floating ball and preparation method thereof |
| CN104493094A (en) * | 2014-12-30 | 2015-04-08 | 浙江省机电设计研究院有限公司 | Rapid precise casting technology based on photocuring 3D printing technique |
| CN104985122A (en) * | 2015-07-22 | 2015-10-21 | 西安交通大学 | Method for integrally casting electric power fitting based on 3D printing technology |
| CN105801108A (en) * | 2016-03-11 | 2016-07-27 | 北京科技大学 | Preparation method of three-dimensional open-framework structure lithium base block tritium value-added agent material |
| CN106495706A (en) * | 2016-10-10 | 2017-03-15 | 东莞华晶粉末冶金有限公司 | A kind of ceramic size, ceramic shell and preparation method thereof |
| CN106853509A (en) * | 2016-12-12 | 2017-06-16 | 重庆市合川区银窝铸造厂 | A kind of high-accuracy ceramic casting mold production technology |
| CN106994759A (en) * | 2017-04-12 | 2017-08-01 | 北京科技大学 | A kind of ceramic impeller gel casting forming mould and its manufacture method |
| CN107067944A (en) * | 2017-06-08 | 2017-08-18 | 深圳市山之田模型艺术设计有限公司 | A kind of real estate models structure and its manufacture craft |
| CN107353008A (en) * | 2017-06-20 | 2017-11-17 | 西安交通大学 | A kind of preparation method of laminated metal ceramic composite part |
| CN108145084A (en) * | 2017-12-23 | 2018-06-12 | 安徽鑫宏机械有限公司 | A kind of combined type plaster inner core investment shell casting technique |
| CN105109040B (en) * | 2014-12-31 | 2018-09-11 | 广西科技大学 | Three-dimensional structure manufacturing process |
| CN109158542A (en) * | 2018-09-14 | 2019-01-08 | 浙江省机电产品质量检测所 | Ceramic mold casting PS unitary mould and its quick cast method based on selective laser sintering |
| CN109475928A (en) * | 2016-07-22 | 2019-03-15 | 赛峰集团 | A method of for manufacturing shell mold |
| CN110734291A (en) * | 2019-10-31 | 2020-01-31 | 陕西博鼎快速精铸科技有限责任公司 | Processing method for ceramic mold injection molding of high-temperature-resistant polymer parts |
| CN111761027A (en) * | 2020-05-21 | 2020-10-13 | 洛阳双瑞精铸钛业有限公司 | Process method for manufacturing titanium and titanium alloy precision castings through photosensitive resin mold |
| CN112552062A (en) * | 2020-12-24 | 2021-03-26 | 南京海通电子材料科技有限公司 | Method for manufacturing composite material |
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2008
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101987347A (en) * | 2010-09-29 | 2011-03-23 | 西安交通大学 | Manufacturing method of core for casting engine exhaust manifold |
| CN101987347B (en) * | 2010-09-29 | 2012-07-25 | 西安交通大学 | Manufacturing method of core for casting engine exhaust manifold |
| CN101966558B (en) * | 2010-09-30 | 2012-05-02 | 安徽应流集团霍山铸造有限公司 | Precision casting method for large castings |
| CN101966558A (en) * | 2010-09-30 | 2011-02-09 | 安徽应流集团霍山铸造有限公司 | Precision casting method for large castings |
| CN102039375B (en) * | 2010-11-20 | 2013-03-13 | 沈阳工业大学 | Method for quickly manufacturing high-temperature alloy hollow blade casting |
| CN102039375A (en) * | 2010-11-20 | 2011-05-04 | 沈阳工业大学 | Method for quickly manufacturing high-temperature alloy hollow blade casting |
| CN102019346A (en) * | 2010-12-30 | 2011-04-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Making method of rapid forming wax pattern of diffuser |
| CN102019347A (en) * | 2010-12-30 | 2011-04-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for making guide vane inner ring by opening process window |
| CN102019347B (en) * | 2010-12-30 | 2012-06-06 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for making guide vane inner ring by opening process window |
| CN102019346B (en) * | 2010-12-30 | 2012-11-07 | 沈阳黎明航空发动机(集团)有限责任公司 | Making method of rapid forming wax pattern of diffuser |
| CN103172391A (en) * | 2011-12-22 | 2013-06-26 | 辽宁省轻工科学研究院 | Method for manufacturing specially-shaped sprue cup by colloidal forming |
| CN103172391B (en) * | 2011-12-22 | 2014-11-12 | 辽宁省轻工科学研究院 | Method for manufacturing specially-shaped sprue cup by colloidal forming |
| CN102688988A (en) * | 2012-06-18 | 2012-09-26 | 哈尔滨工业大学 | Micro-investment casting forming method for complex micro-component |
| CN103146166A (en) * | 2013-03-07 | 2013-06-12 | 佛山市浪鲸洁具有限公司 | Forming mold of sanitary product and preparation method thereof |
| CN103146166B (en) * | 2013-03-07 | 2015-12-09 | 佛山市浪鲸洁具有限公司 | Forming mould of a kind of sanitaryware and preparation method thereof |
| CN103240791A (en) * | 2013-04-16 | 2013-08-14 | 西安交通大学 | Ceramic slurry liquidity control method for gel injection molding |
| CN103240791B (en) * | 2013-04-16 | 2015-08-26 | 西安交通大学 | A kind of mobility control method of gel injection-moulding ceramic size |
| CN103231025B (en) * | 2013-04-18 | 2015-01-21 | 西安交通大学 | Preparation method of wall thickness controllable directional solidification casting mould |
| CN103231025A (en) * | 2013-04-18 | 2013-08-07 | 西安交通大学 | Preparation method of wall thickness controllable directional solidification casting mould |
| CN103464690A (en) * | 2013-08-26 | 2013-12-25 | 西安交通大学 | Manufacturing method of ceramic mold of monocrystal turbine blade |
| CN103464690B (en) * | 2013-08-26 | 2016-12-07 | 西安交通大学 | A kind of manufacture method of ceramic mold of monocrystal turbine blade |
| CN103722127A (en) * | 2013-12-31 | 2014-04-16 | 陕西恒通智能机器有限公司 | Rapid investment casting method based on stereolithography (SL) |
| CN103722127B (en) * | 2013-12-31 | 2016-04-20 | 陕西恒通智能机器有限公司 | A kind of rapid investment casting method based on photocuring (SL) |
| CN103801658A (en) * | 2014-02-17 | 2014-05-21 | 山东旗开重型机械有限公司 | Manufacturing method of ceramic mold shell |
| CN103979938B (en) * | 2014-04-25 | 2016-03-30 | 上海卫蓝海洋材料科技有限公司 | The withstand voltage alumina-ceramic hollow float in a kind of deep-sea |
| CN103979938A (en) * | 2014-04-25 | 2014-08-13 | 上海卫蓝海洋材料科技有限公司 | Deep-sea pressure resistant alumina ceramic hollow floating ball and preparation method thereof |
| CN104493094A (en) * | 2014-12-30 | 2015-04-08 | 浙江省机电设计研究院有限公司 | Rapid precise casting technology based on photocuring 3D printing technique |
| CN105109040B (en) * | 2014-12-31 | 2018-09-11 | 广西科技大学 | Three-dimensional structure manufacturing process |
| CN104985122A (en) * | 2015-07-22 | 2015-10-21 | 西安交通大学 | Method for integrally casting electric power fitting based on 3D printing technology |
| CN105801108B (en) * | 2016-03-11 | 2018-09-14 | 北京科技大学 | A kind of preparation method of three-dimensional open-framework lithium matrix body tritium increment agent material |
| CN105801108A (en) * | 2016-03-11 | 2016-07-27 | 北京科技大学 | Preparation method of three-dimensional open-framework structure lithium base block tritium value-added agent material |
| CN109475928A (en) * | 2016-07-22 | 2019-03-15 | 赛峰集团 | A method of for manufacturing shell mold |
| CN106495706A (en) * | 2016-10-10 | 2017-03-15 | 东莞华晶粉末冶金有限公司 | A kind of ceramic size, ceramic shell and preparation method thereof |
| CN106853509A (en) * | 2016-12-12 | 2017-06-16 | 重庆市合川区银窝铸造厂 | A kind of high-accuracy ceramic casting mold production technology |
| CN106994759A (en) * | 2017-04-12 | 2017-08-01 | 北京科技大学 | A kind of ceramic impeller gel casting forming mould and its manufacture method |
| CN107067944A (en) * | 2017-06-08 | 2017-08-18 | 深圳市山之田模型艺术设计有限公司 | A kind of real estate models structure and its manufacture craft |
| CN107353008A (en) * | 2017-06-20 | 2017-11-17 | 西安交通大学 | A kind of preparation method of laminated metal ceramic composite part |
| CN108145084A (en) * | 2017-12-23 | 2018-06-12 | 安徽鑫宏机械有限公司 | A kind of combined type plaster inner core investment shell casting technique |
| CN108145084B (en) * | 2017-12-23 | 2019-09-06 | 安徽鑫宏机械有限公司 | A kind of combined type plaster inner core investment shell casting technique |
| CN109158542A (en) * | 2018-09-14 | 2019-01-08 | 浙江省机电产品质量检测所 | Ceramic mold casting PS unitary mould and its quick cast method based on selective laser sintering |
| CN110734291A (en) * | 2019-10-31 | 2020-01-31 | 陕西博鼎快速精铸科技有限责任公司 | Processing method for ceramic mold injection molding of high-temperature-resistant polymer parts |
| CN111761027A (en) * | 2020-05-21 | 2020-10-13 | 洛阳双瑞精铸钛业有限公司 | Process method for manufacturing titanium and titanium alloy precision castings through photosensitive resin mold |
| CN112552062A (en) * | 2020-12-24 | 2021-03-26 | 南京海通电子材料科技有限公司 | Method for manufacturing composite material |
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