CN106563763A - Granular material used for 3D printing and casting model for 3D printing - Google Patents
Granular material used for 3D printing and casting model for 3D printing Download PDFInfo
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- CN106563763A CN106563763A CN201610930392.0A CN201610930392A CN106563763A CN 106563763 A CN106563763 A CN 106563763A CN 201610930392 A CN201610930392 A CN 201610930392A CN 106563763 A CN106563763 A CN 106563763A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
Abstract
The invention discloses a granular material used for 3D printing and a casting model for 3D printing. The granular material comprises any one of silica sand, magnesite, chromite sand, ceramsite and forsterite sand; a grain size of the granular material ranges from 0.05 mm to 0.6 mm; within the range of the grain size, the grain size comprises a first grain size to a fifth grain size from small to big, and the first grain size and the fifth grain size are separately the smallest grain size and the biggest grain size within the range of the grain size; the grain size of the granular material is configured in mass proportion: less than 5% of the first grain size, 2%-20% of the second grain size, 15%-60% of the third grain size, 20%-50% of the fourth grain size and less than 15% of the fifth grain size. The casting model for 3D printing has good embedding property and porosity complementarity, and meets permeation of low-viscosity liquid, so that strength of a casting mould for 3D printing and (or) a sand core can be effectively improved.
Description
Technical field
The present invention relates to cast and 3D printing technique field, it particularly relates to one kind is in casting casting mold and (or) core
Forming process in, the casting pattern of granular materialss and 3D printing for 3D printing.
Background technology
Known method for producing, casting casting mold and (or) core has various, and wherein 3D printing method is a kind of nothing
The quick molding method of mould.
One kind among disclosed 3D printing method is the peaceful method of clo.The peaceful method of clo is specially laser sintered 3D molding
Method, realizes and produces without mould, and casting mold and (or) core are formed by the granular materialss of binding agent construction successively is coated with, single
Individual loose granular materialss are selectively heated by laser beam and realize bonding.But find in actual applications, this technology
There is the sufficient heat of low efficiency, first low intensity, final solidification needs in method, apply heat after-contraction and deform serious problem.
In the application of Publication No. US20050003189A1, a kind of layer building method for modeling is disclosed,
In the method thermoplastic particles material is mixed with powdery binder, and with aqueous solvent as print media successively
Print.Wherein, binding agent should be soluble in aqueous print media.Next, model is departed from the powder for surrounding, and can
Can be dried in hot stove in subsequent treatment, so as to improve intensity.But, the patent is not related to thermoplastic particles material
Composition content and granularity.In disclosed other 3D printing methods, there is also that high to instrument dependency, or just intensity is low
Problem.Therefore need to design a kind of high granular materialss for 3D printing of intensity.
The content of the invention
For in correlation technique, using the problem that the casting mold and (or) sand core strength of the casting of 3D printing method are low, the present invention is carried
Go out the casting pattern of a kind of granular materialss for 3D printing and 3D printing, the casting mold and (or) sand of 3D printing can be effectively improved
The intensity of core.
The technical scheme is that what is be achieved in that：
According to an aspect of the invention, there is provided a kind of granular materialss for 3D printing, granular materialss include silica sand,
Any one among magnesia, chromite sand, nice foundry sand and forsterite sand；The particle size range of granular materialss in 0.05mm extremely
Between 0.6mm, include in the particle size range granularity the first granularity from small to large, the second granularity, the 3rd granularity, the 4th granularity and
5th granularity, the first granularity are 30 mesh, 40 mesh, 50 mesh, 70 mesh, 100 mesh, 140 mesh, 200 mesh and 270 mesh to the 5th granularity
One of, and the first granularity and the 5th granularity are respectively the minimum particle size and maximum particle size of particle size range；The granularity of granular materialss
Configure by following mass ratio：The content of the first granularity below 5%, the content of the second granularity between 2% to 20%, the 3rd
Between 15% to 60%, between 20% to 50%, the content of the 5th granularity exists the content of granularity for the content of the 4th granularity
Less than 15%.
According to one embodiment of present invention, particle size range is 0.05mm to 0.2mm；First granularity be 70 mesh, second
Spend for 100 mesh, the 3rd granularity be 140 mesh, the 4th granularity be 200 mesh, the 5th granularity be 270 mesh；The granularity of granular materialss by with
Lower mass ratio configuration：Below 5%, between 8% to 20%, the content of 140 mesh exists the content of 70 mesh for the content of 100 mesh
Between 30% to 60%, between 20% to 35%, the content of 270 mesh is below 2% for the content of 200 mesh.
According to one embodiment of present invention, particle size range is 0.08mm to 0.3mm；First granularity be 50 mesh, second
Spend for 70 mesh, the 3rd granularity be 100 mesh, the 4th granularity be 140 mesh, the 5th granularity be 200 mesh；The granularity of granular materialss is by following
Mass ratio is configured：, below 5%, between 8% to 20%, the content of 140 mesh is 30% for the content of 100 mesh for the content of 70 mesh
To between 60%, between 20% to 35%, the content of 270 mesh is below 2% for the content of 200 mesh.
According to one embodiment of present invention, particle size range is 0.1mm to 0.4mm；First granularity is 40 mesh, the second granularity
For 50 mesh, the 3rd granularity be 70 mesh, the 4th granularity be 100 mesh, the 5th granularity be 140 mesh；The granularity of granular materialss presses following matter
Amount proportional arrangement：The content of 40 mesh below 0.8%, the content of 50 mesh between 8% to 15%, the content of 70 mesh 40% to
Between 60%, between 20% to 35%, the content of 140 mesh is below 5% for the content of 100 mesh.
According to one embodiment of present invention, particle size range is 0.15mm to 0.6mm；First granularity be 30 mesh, second
Spend for 40 mesh, the 3rd granularity be 50 mesh, the 4th granularity be 70 mesh, the 5th granularity be 100 mesh；The granularity of granular materialss presses following matter
Amount proportional arrangement：The content of 30 mesh below 0.2%, the content of 40 mesh between 2% to 10%, the content of 50 mesh 15% to
Between 40%, between 30% to 50%, the content of 100 mesh is between 5% to 15% for the content of 70 mesh.
According to one embodiment of present invention, granular materialss also include：Curing materials；Curing materials include fluent material and
At least one among solid material, curing materials are configured between 0.2% to 1.5% in the mass ratio in granular materialss；
Wherein, fluent material includes organic acid, mineral acid, alcohols and esters；Solid material includes PVA, CMC, PVP, MgO and hydroxyl second
Base cellulose.
According to one embodiment of present invention, mass ratio of the curing materials in granular materialss be configured in 0.3% to
Between 0.5%.
According to one embodiment of present invention, granular materialss are applied to the core for printing mold quality in below 100kg.
According to one embodiment of present invention, granular materialss are applied to printing mold quality between 100kg to 500kg
Core.
According to one embodiment of present invention, granular materialss are applied to printing mold quality between 500kg to 1000kg
Core.
According to one embodiment of present invention, granular materialss are applied to the core for printing mold quality in more than 1000kg.
According to one embodiment of present invention, silica sand includes：More than 90% is configured in the mass ratio in granular materialss
SiO2, be configured in less than 1% Fe2O3, and be configured in less than 3% Al2O3；Magnesia includes：Quality in granular materialss
MgO of the proportional arrangement more than 95%, the SiO for being configured in less than 3%2, and the Fe for being configured in less than 0.5%2O3；Chromite sand
Including：More than 46% Cr is configured in the mass ratio in granular materialss2O3, be configured in less than 29% Fe2O3, and configuration
SiO below 3%2；Nice foundry sand includes：More than 70% Al is configured in the mass ratio in granular materialss2O3, be configured in
Less than 15% SiO2, and be configured in less than 5% Fe2O3；Forsterite sand includes：Mass ratio in granular materialss is matched somebody with somebody
Put the MgO more than 47%, be configured in less than 40% SiO2, and be configured in less than 10% Fe2O3。
According to a further aspect in the invention, there is provided a kind of casting pattern of 3D printing, the material of casting pattern include
State granular materialss, wherein casting pattern at least include casting mold and core one of.
According to one embodiment of present invention, casting pattern also includes binding agent；Binding agent include thermoplastic polymer, can
Insoluble polymer, wax, synthetic resin, natural resin, sugar, salt, inorganic crosslinking agent and MgCl2In one or more of combination.
According to one embodiment of present invention, the viscosity of binding agent is configured between 4mPa.s to 500mPa.s.
According to one embodiment of present invention, the viscosity of binding agent is configured between 5mPa.s to 20mPa.s.
According to one embodiment of present invention, mass ratio of the binding agent in casting pattern is configured in 0.2% to 1.5%
Between.
The present invention can make the casting pattern of 3D printing have good mosaicism and hole complementary, meet low viscosity
The infiltration of liquid such that it is able to effectively improve the intensity of the casting mold and (or) core of 3D printing.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing that needs are used is briefly described, it should be apparent that, drawings in the following description are only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can be being obtained according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the schematic diagram to granular materialss jet binder according to embodiments of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, the every other embodiment obtained by those of ordinary skill in the art belong to present invention protection
Scope.
A kind of embodiments in accordance with the present invention, there is provided granular materialss for 3D printing.
Granular materialss for 3D printing according to embodiments of the present invention：The granular materialss include silica sand, magnesia, chromite
Any one among sand, nice foundry sand and forsterite sand；
The particle size range of granular materialss includes granularity from small to large between 0.05mm to 0.6mm, in the particle size range
First granularity, the second granularity, the 3rd granularity, the 4th granularity and the 5th granularity, the first granularity to the 5th granularity be 30 mesh, 40
One of mesh, 50 mesh, 70 mesh, 100 mesh, 140 mesh, 200 mesh and 270 purposes, and the first granularity and the 5th granularity are respectively particle diameter model
The minimum particle size enclosed and maximum particle size；
The granularity of granular materialss is configured by following mass ratio：Below 5%, second granularity contains the content of the first granularity
Amount between 2% to 20%, the content of the 3rd granularity between 15% to 60%, the content of the 4th granularity 20% to 50% it
Between, the content of the 5th granularity is below 15%.
By above-mentioned technical proposal, the granular materialss of the present invention can have good mosaicism and hole complementary, full
The foot infiltration of low-viscosity (mobile) liquid such that it is able to effectively improve the intensity of the casting mold and (or) core of 3D printing, it is to avoid pouring
Scab defect is produced during note；In addition, the granular materialss of the present invention are while with good vertical direction osmosiss, reduce
The diffusibility of horizontal direction, is improve the precision of the casting mold and (or) core of 3D printing, is reduced the difficulty of floating sand cleaning with this
Degree.
According to one embodiment of present invention, above-mentioned silica sand includes：Mass ratio in granular materialss is configured in 90%
SiO above2, be configured in less than 1% Fe2O3, and be configured in less than 3% Al2O3；Above-mentioned magnesia includes：In granular materialss
In mass ratio be configured in more than 95% MgO, be configured in less than 3% SiO2, and the Fe for being configured in less than 0.5%2O3；
Chromite sand includes：More than 46% Cr is configured in the mass ratio in granular materialss2O3, be configured in less than 29%
Fe2O3, and be configured in less than 3% SiO2；Above-mentioned nice foundry sand includes：Mass ratio in granular materialss be configured in 70% with
On Al2O3, be configured in less than 15% SiO2, and be configured in less than 5% Fe2O3；Above-mentioned forsterite sand includes：In granule
Mass ratio in material is configured in more than 47% MgO, is configured in less than 40% SiO2, and be configured in less than 10%
Fe2O3。
The sand grains form of granular materialss can be spherical, oval, or pointed shape, or other sand grains forms, this
Invention is not especially limited to the sand grains form of granular materialss.
According to one embodiment of present invention, the particle size range of granular materialss is 0.05mm to 0.2mm；The grain of granular materialss
Degree is configured by following mass ratio：Below 5%, between 8% to 20%, 140 purposes contain the content of 70 mesh for the content of 100 mesh
Between 30% to 60%, between 20% to 35%, the content of 270 mesh is below 2% for the content of 200 mesh for amount.Further,
The granular materialss are applicable to print core of the mold quality in below 100kg.
Preferred embodiment one：
Granular materialss include silica sand, and the specific composition of silica sand is configured by following mass ratio：
According to one embodiment of present invention, the particle size range of granular materialss is 0.08mm to 0.3mm；First granularity is 50
Mesh, the second granularity are 70 mesh, the 3rd granularity is 100 mesh, the 4th granularity is 140 mesh, the 5th granularity is 200 mesh；Granular materialss
Granularity is configured by following mass ratio：The content of 70 mesh below 5%, the content of 100 mesh between 8% to 20%, 140 purposes
Between 30% to 60%, between 20% to 35%, the content of 270 mesh is below 2% for the content of 200 mesh for content.Further
Ground, the granular materialss are applied to printing core of the mold quality between 100kg to 500kg.
Preferred embodiment two：
Granular materialss include silica sand, and the specific composition of silica sand is configured by following mass ratio：
According to one embodiment of present invention, the particle size range of granular materialss is 0.1mm to 0.4mm；First granularity is 40
Mesh, the second granularity are 50 mesh, the 3rd granularity is 70 mesh, the 4th granularity is 100 mesh, the 5th granularity is 140 mesh；The grain of granular materialss
Degree is configured by following mass ratio：Below 0.8%, between 8% to 15%, 70 purposes contain the content of 40 mesh for the content of 50 mesh
Between 40% to 60%, between 20% to 35%, the content of 140 mesh is below 5% for the content of 100 mesh for amount.Further,
The granular materialss are applied to printing core of the mold quality between 500kg to 1000kg.
Preferred embodiment three：
Granular materialss include silica sand, and the specific composition of silica sand is configured by following mass ratio：
According to one embodiment of present invention, particle size range is 0.15mm to 0.6mm；First granularity be 30 mesh, second
Spend for 40 mesh, the 3rd granularity be 50 mesh, the 4th granularity be 70 mesh, the 5th granularity be 100 mesh；The granularity of granular materialss presses following matter
Amount proportional arrangement：The content of 30 mesh below 0.2%, the content of 40 mesh between 2% to 10%, the content of 50 mesh 15% to
Between 40%, between 30% to 50%, the content of 100 mesh is between 5% to 15% for the content of 70 mesh.Further, this
Grain material is applied to the core for printing mold quality in more than 1000kg.
Preferred embodiment four：
Granular materialss include silica sand, and the specific composition of silica sand is configured by following mass ratio：
According to one embodiment of present invention, granular materialss also include：Curing materials；The curing materials include fluent material
With at least one among solid material, the mass ratio of curing materials is configured between 0.2% to 1.5%.Wherein, liquid material
Material can be：Organic acid, mineral acid, alcohols and esters；Solid material can be PVA (Polyvinyl Alcohol, polyethylene
Alcohol), CMC (Carboxyl Methyl Cellulose, carboxymethyl cellulose), PVP (polyvinyl Pyrrolidone, gather
Vinylpyrrolidone), MgO (magnesium oxide) and hydroxyethyl cellulose.
Preferably, curing materials are configured between 0.3% to 0.5% in the mass ratio in granular materialss.By
Above-mentioned curing materials are configured in grain material, the flowing of scalable granular materialss can promote, or accelerate binding agent solidification, or make
Granular materialss itself have certain ability to cure.
With reference to Fig. 1, when above-mentioned granular materialss are during the casting for 3D printing, be to each by granular materialss
The 20 layer of granular material successively jet binders for being formed, the first direction 10 in such as Fig. 1 show the injection direction of binding agent, the
Two directions 30 show the infiltration direction of binding agent.The binding agent can be containing the one kind that can occur chemically or physically to be polymerized or
Various of monomer, for example, can be thermoplastic polymer, soluble polymer, wax, synthetic resin, natural resin, sugar, salt, inorganic friendship
Connection agent and MgCl2In one or more of combination.The viscosity of binding agent preferably exists between 4mPa.s to 500mPa.s
Between 5mPa.s to 20mPa.s；Between 0.2% to 1.5%, the ratio is binding agent in granular materialss to binding agent addition
Mass ratio.Specifically, in the case where 3D multistage inkjet printings are applied to, by bonding between each layer of granular material
Agent infiltration is mutually bondd, as the granular materialss of the present invention have good osmotic effect to low viscosity binders, therefore
The maximum compressive strength of the casting mold and (or) core of 3D printing can be made to reach more than 5Mpa.As shown in table 1, it is using above-mentioned excellent
Select core composition and sand core strength that the granular materialss of embodiment one to preferred embodiment four are obtained by 3D printing.
Table 1
Embodiments in accordance with the present invention, additionally provide a kind of casting pattern of 3D printing, including above-mentioned granular materialss, wherein
Casting pattern includes casting mold and (or) core.
According to one embodiment of present invention, casting pattern also includes binding agent；Binding agent include thermoplastic polymer, can
Insoluble polymer, wax, synthetic resin, natural resin, sugar, salt, inorganic crosslinking agent and MgCl2In one or more of combination.Tool
Body, in the forming process of 3D printing casting pattern, to successively be sprayed to each by the layer of granular material that granular materialss are formed
Above-mentioned binding agent.
According to one embodiment of present invention, the viscosity of binding agent is between 4mPa.s to 500mPa.s.
Preferably, the viscosity of binding agent is between 5mPa.s to 20mPa.s.
According to one embodiment of present invention, mass ratio of the binding agent in casting pattern 0.2% to 1.5% it
Between.
In sum, by means of above-mentioned technical proposal, the granular materialss of the present invention can have good mosaicism and hole
Gap is complementary, meets the infiltration of low-viscosity (mobile) liquid such that it is able to effectively improve the intensity of the casting mold and (or) core of 3D printing,
Avoid scab defect is produced in cast；In addition, the granular materialss of the present invention are with good vertical direction osmosiss
While, reduce the diffusibility of horizontal direction, with this improve the casting mold and (or) core of 3D printing precision, reduce it is floating
The difficulty of sand cleaning；Mutually bondd by binding agent infiltration between each layer of granular material, as granular materialss are to low viscous
Degree binding agent has good osmotic effect, therefore reaches can the maximum compressive strength of the casting mold and (or) core of 3D printing
More than 5Mpa.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (17)
1. a kind of granular materialss for 3D printing, it is characterised in that
The granular materialss include any one among silica sand, magnesia, chromite sand, nice foundry sand and forsterite sand；
The particle size range of granular materialss includes granularity from small to large between 0.05mm to 0.6mm, in the particle size range
First granularity, the second granularity, the 3rd granularity, the 4th granularity and the 5th granularity, first granularity to the 5th granularity be 30 mesh,
One of 40 mesh, 50 mesh, 70 mesh, 100 mesh, 140 mesh, 200 mesh and 270 purposes, and first granularity and the 5th granularity be respectively
The minimum particle size and maximum particle size of particle size range；
The granularity of granular materialss is configured by following mass ratio：The content of first granularity below 5%, second granularity
Content between 2% to 20%, between 15% to 60%, the content of the 4th granularity exists for the content of the 3rd granularity
Between 20% to 50%, the content of the 5th granularity is below 15%.
2. granular materialss for 3D printing according to claim 1, it is characterised in that
The particle size range is 0.05mm to 0.2mm；
First granularity is 70 mesh, second granularity is 100 mesh, the 3rd granularity is 140 mesh, the 4th granularity is
200 mesh, the 5th granularity are 270 mesh；
The granularity of the granular materialss is configured by following mass ratio：, below 5%, the content of 100 mesh is 8% for the content of 70 mesh
To between 20%, between 30% to 60%, between 20% to 35%, 270 purposes contain for the content of 200 mesh for the content of 140 mesh
Amount is below 2%.
3. granular materialss for 3D printing according to claim 1, it is characterised in that
The particle size range is 0.08mm to 0.3mm；
First granularity is 50 mesh, second granularity is 70 mesh, the 3rd granularity is 100 mesh, the 4th granularity is
140 mesh, the 5th granularity are 200 mesh；
The granularity of the granular materialss is configured by following mass ratio：, below 5%, the content of 100 mesh is 8% for the content of 70 mesh
To between 20%, between 30% to 60%, between 20% to 35%, 270 purposes contain for the content of 200 mesh for the content of 140 mesh
Amount is below 2%.
4. granular materialss for 3D printing according to claim 1, it is characterised in that
The particle size range is 0.1mm to 0.4mm；
First granularity is 40 mesh, second granularity is 50 mesh, the 3rd granularity is 70 mesh, the 4th granularity is
100 mesh, the 5th granularity are 140 mesh；
The granularity of the granular materialss is configured by following mass ratio：Below 0.8%, the content of 50 mesh exists the content of 40 mesh
Between 8% to 15%, the content of 70 mesh between 40% to 60%, the content of 100 mesh between 20% to 35%, 140 purposes
Content is below 5%.
5. granular materialss for 3D printing according to claim 1, it is characterised in that
The particle size range is 0.15mm to 0.6mm；
First granularity is 30 mesh, second granularity is 40 mesh, the 3rd granularity is 50 mesh, the 4th granularity is 70
Mesh, the 5th granularity are 100 mesh；
The granularity of the granular materialss is configured by following mass ratio：Below 0.2%, the content of 40 mesh exists the content of 30 mesh
Between 2% to 10%, between 15% to 40%, between 30% to 50%, 100 purposes contain for the content of 70 mesh for the content of 50 mesh
Amount is between 5% to 15%.
6. granular materialss for 3D printing according to any one of claim 1, it is characterised in that the granular materialss are also
Including：Curing materials；
The curing materials include fluent material and at least one among solid material, and the curing materials are in the granular material
Mass ratio in material is configured between 0.2% to 1.5%；
Wherein, the fluent material includes organic acid, mineral acid, alcohols and esters；
The solid material includes PVA, CMC, PVP, MgO and hydroxyethyl cellulose.
7. granular materialss for 3D printing according to any one of claim 1, it is characterised in that the curing materials exist
Mass ratio in the granular materialss is configured between 0.3% to 0.5%.
8. granular materialss for 3D printing according to claim 2, it is characterised in that the granular materialss are applied to be beaten
Core of the print mold quality in below 100kg.
9. granular materialss for 3D printing according to claim 3, it is characterised in that the granular materialss are applied to be beaten
Print core of the mold quality between 100kg to 500kg.
10. granular materialss for 3D printing according to claim 4, it is characterised in that the granular materialss are applied to
Print core of the mold quality between 500kg to 1000kg.
11. granular materialss for 3D printing according to claim 5, it is characterised in that the granular materialss are applied to
Print core of the mold quality in more than 1000kg.
12. granular materialss for 3D printing according to claim 1, it is characterised in that
The silica sand includes：Mass ratio in the granular materialss is configured in more than 90% SiO2, be configured in less than 1%
Fe2O3, and be configured in less than 3% Al2O3；
The magnesia includes：Mass ratio in the granular materialss is configured in more than 95% MgO, is configured in less than 3%
SiO2, and the Fe for being configured in less than 0.5%2O3；
The chromite sand includes：Mass ratio in the granular materialss is configured in more than 46% Cr2O3, be configured in
Less than 29% Fe2O3, and be configured in less than 3% SiO2；
The nice foundry sand includes：Mass ratio in the granular materialss is configured in more than 70% Al2O3, be configured in 15%
Following SiO2, and be configured in less than 5% Fe2O3；
The forsterite sand includes：Mass ratio in the granular materialss is configured in more than 47% MgO, is configured in
Less than 40% SiO2, and be configured in less than 10% Fe2O3。
13. a kind of casting patterns of 3D printing, it is characterised in that the material of the casting pattern includes the claims 1-12
Granular materialss described in any one, the casting pattern at least include casting mold and core one of.
The casting pattern of 14. 3D printings according to claim 13, it is characterised in that
The casting pattern also includes binding agent；The binding agent includes thermoplastic polymer, soluble polymer, wax, synthesis tree
Fat, natural resin, sugar, salt, inorganic crosslinking agent and MgCl2In one or more of combination.
The casting pattern of 15. 3D printings according to claim 14, it is characterised in that
The viscosity of binding agent is configured between 4mPa.s to 500mPa.s.
The casting pattern of 16. 3D printings according to claim 15, it is characterised in that
The viscosity of the binding agent is configured between 5mPa.s to 20mPa.s.
The casting pattern of 17. 3D printings according to claim 14, it is characterised in that
Mass ratio of the binding agent in the casting pattern is configured between 0.2% to 1.5%.
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| CN108296424A (en) * | 2017-09-27 | 2018-07-20 | 柳州市柳晶科技股份有限公司 | A kind of 3D printing precoated sand prepared as adhesive using cellulose |
| CN109128010A (en) * | 2018-10-17 | 2019-01-04 | 共享智能铸造产业创新中心有限公司 | A kind of casting method of hydraulic valve class casting |
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| CN108296424A (en) * | 2017-09-27 | 2018-07-20 | 柳州市柳晶科技股份有限公司 | A kind of 3D printing precoated sand prepared as adhesive using cellulose |
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| CN109128010A (en) * | 2018-10-17 | 2019-01-04 | 共享智能铸造产业创新中心有限公司 | A kind of casting method of hydraulic valve class casting |
| CN110076289A (en) * | 2019-05-08 | 2019-08-02 | 同济大学 | A kind of 3D printing technique of sand mold manufacture |
| CN110076289B (en) * | 2019-05-08 | 2020-01-31 | 同济大学 | 3D printing process for manufacturing sand molds |
| CN113477878A (en) * | 2021-06-18 | 2021-10-08 | 广西玉柴机器股份有限公司 | Special molding sand for 3D printing of diesel engine cylinder cover sand core |
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