CN109732741A - A kind of forming device and method for inorganic coagulation material product increasing material manufacturing - Google Patents
A kind of forming device and method for inorganic coagulation material product increasing material manufacturing Download PDFInfo
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- CN109732741A CN109732741A CN201910168394.4A CN201910168394A CN109732741A CN 109732741 A CN109732741 A CN 109732741A CN 201910168394 A CN201910168394 A CN 201910168394A CN 109732741 A CN109732741 A CN 109732741A
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- product
- inorganic coagulation
- spray head
- forming
- forming device
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/001—Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material
-
- 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
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- 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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
Abstract
The invention discloses a kind of apparatus and method for inorganic coagulation material product increasing material manufacturing.The device is provided with no less than two groups of spray heads or jet array, in conjunction with correlation method, to manufacture the inorganic coagulation material product and special ceramics product that planform is complicated, dimensional accuracy and surface quality requirements are high.Permeability barrier forms the isolation strip of barrier coagulating agent infiltration between product and surrounding dusty material, guarantees that product has better surface quality and higher dimensional accuracy, and is contaminated the dusty material for having neither part nor lot in product forming not.
Description
Technical field
The present invention relates to inorganic coagulation material product forming technique fields, especially a kind of to be used for inorganic coagulation material product
The forming device and method of increasing material manufacturing.
Background technique
Inorganic coagulation material product is widely used in the every field of social production, life.Traditional cement (powdery hydraulicity
Inorganic coagulation material) and emerging geo-polymer product be all Typical Representative therein.
Common inorganic coagulation material product manufacturing process specifically includes that premix casting method, direct-injection method, injection vacuum
Evaporation, premix pressurization, premix extrusion molding, layer spread method etc..Wherein: it is thicker to be primarily adapted for manufacture wall thickness for premix casting method
Small-sized special-shaped product；Direct-injection method, is primarily adapted for manufacturing that plate, the shapes such as wave watt are simple, the biggish product of area；Injection is true
Empty evaporation is primarily adapted for manufacture and requires the product demoulded immediately；Pressurization is premixed, the complicated picture on surface of manufacture is primarily adapted for
Product；Extrusion molding is premixed, is primarily adapted for manufacturing the more complex special-shaped elongated article in surface；Layer spread method is primarily adapted for manufacturing shape
The simple product of shape.
The above method is had in common that: must make corresponding model according to the shape of product after forming in advance, so
The inorganic gel slurry perfusion progressive die type that will be mixed in different ways afterwards is sloughed model after slurry solidification again, is produced
Product.The above method is less complicated suitable for manufacture shape, and dimension precision requirement is not bery high (grade), the more coarse system in surface
Product, such as: large-scale component (structures), well lid, culvert pipe, Bo Wa and face brick.
By the constraint of existing molding and ejection technique, the shape of inorganic coagulation material product can not be designed very multiple
It is miscellaneous, to greatly limit its application range, it is difficult to manufacture that surface is smooth, the fine system of the preferable inorganic material of dimensional accuracy
Product.
Existing correlation increases material manufacturing technology can make shape or structure is relative complex, and dimension precision requirement is relatively high
Product.But for the printing of the powder bed of inorganic coagulation material, since coagulating agent seeps in loose porous inorganic coagulation material
Thoroughly, cause formed product in forming process, the inorganic powder materials blur boundary with its periphery, to seriously affect product
Surface quality and dimensional accuracy.
Summary of the invention
It is an object of the present invention in view of the problems of the existing technology, provide a kind of for inorganic coagulation material product
The forming device and its method of increasing material manufacturing can be used for manufacturing shape or the nothing that structure is complicated, surface is smooth, dimensional accuracy is high
Machine gelled material product.
In order to solve the above technical problems, the present invention provides a kind of formings for inorganic coagulation material product increasing material manufacturing
Device, forming device include power spreading device, injection apparatus, formation cylinder and lifting platform, and the power spreading device is used for inorganic gel
Material uniformly sprawls into plane in lifting platform upper surface, and the injection apparatus includes at least two groups spray head or two groups of jet arrays,
Wherein one group of spray head or jet array are used for the spray of horizontal cross-section entity area profile outer rim corresponding to product in the material layer
Resistance penetration enhancer is penetrated, another group of spray head or jet array are used for the injection of horizontal cross-section entity area corresponding to product in the material layer
Coagulating agent, the lifting platform are placed in formation cylinder, elevating movement are carried out along formation cylinder inner wall, for carrying the inorganic glue sprawled
Gel material.
Further, the spray head of the injection apparatus or the injection frequency of jet array are not less than 20KHz.
Further, for spraying the spray head or jet array of resistance penetration enhancer, the viscosity of the liquid sprayed is not less than
150CP。
This law is bright to additionally provide a kind of manufacturing process of forming device for inorganic coagulation material product increasing material manufacturing, packet
Include following steps:
A) powdered inorganic cementitious material is sprawled into the material layer of specified thickness by power spreading device in the plane；
B) one group of spray head or jet array the entity area profile outer rim in horizontal cross-section corresponding to product in the material layer are sprayed
Hinder penetration enhancer；
C) another group of spray head or jet array the entity area condensation by injection in horizontal cross-section corresponding to product in the material layer
Agent；
D) above-mentioned steps are repeated in, until completing the forming of product；
Wherein, the inorganic coagulation material and coagulating agent curing reaction form the product layer in corresponding material layer, hinder penetration enhancer
It prevents the cementitious material of coagulating agent and product outside the entity area of horizontal cross-section from reacting, and forms resistance infiltration in product surface
Wrapping layer abolishes product needed for resistance infiltration wrapping layer obtains after completing the forming of product, and the addition for hindering penetration enhancer can effectively prevent
Coagulating agent permeates in the dusty material of non-corresponding entity area, to guarantee the precision and surface smoothness of product.
Further, the coagulating agent matches with inorganic coagulation material, by water, waterglass, accelerator, alkali metal soln
One of or a variety of compositions.
Further, the inorganic coagulation material is cement or geo-polymer, also includes using inorganic coagulation material as base
The cement-base composite material or geopolymer composite material of material.
Further, the cement-base composite material is that cement matrix mixing filler material or enhancing are expected, geology polymerization
Object composite material is that geo-polymer substrate mixing filler material or enhancing are expected.
Further, the filler material is one of bone meal, mountain flour, ceramic powder or a variety of, and the enhancing material is carbon fiber
One of dimension, glass fibre, mineral fibres are a variety of.
Further, the filler material particle diameter distribution is D10=30 micron, D50=50 micron, D90=80 micron, the increasing
Strong material length is not more than 120 microns, is not less than 40 microns, and of length no more than 90 microns of ratio is not less than 90%.
Further, the filler material is clay mineral, quartz, feldspar or oxide ceramics, nitride ceramics, carbide
One of ceramic powder is a variety of, for making ceramic highly finished product.
Further, when inorganic coagulation material is high alumina cement, the filler material is ceramic powder, and ceramic powder partial size is not
More than 20 microns, product formed thereby is put into sintering furnace as green part, is sintered by ceramic sintering process, obtained to make pottery
The fine product of ceramics based on porcelain phase.Before starting ceramic post sintering, high-precision processing can be carried out to green part as needed, improved
The dimensional accuracy of green part.
The present invention occurs to chemically react and generate the characteristic of in-situ solidifying after mixing using inorganic coagulation material with coagulating agent,
Increasing material manufacturing (3D printing) technical principle of " Layered manufacturing, superposition forming " is applied to the forming of inorganic coagulation material product.
Compared with existing traditional inorganic material forming technique and increasing material manufacturing inorganic coagulation material forming technique, beneficial effects of the present invention
It is:
1, the transformation directly manufactured from Design of digital to digitlization is realized, the fine product of inorganic coagulation material can be preferably solved
Problems in forming, realize that the prior art was difficult to even make has complex appearance, complicated inner cavity, hollow out or nestable knot
Structure, the direct forming of the smooth fine product in surface, wherein dimensional accuracy is up to hundred micron orders or even hundred microns with junior；
2, laser, laser galvanometer system, no temperature field, vacuum degree and atmosphere is not used in forming device of the present invention
Protection etc. strict control requirement, compared with other relevant 3D printing forming modes, no matter equipment, material, or produce
The all great price advantage of the energy consumption of product manufacturing process；
3, in the present invention resistance infiltration wrapping layer setting, blocked coagulating agent to around drip molding surface without the powdered of forming
The path of inorganic coagulation material infiltration, on the one hand makes drip molding surface that will not adhere to surrounding inorganic gel powder, guarantee at
Shape part surface is smooth；On the other hand, the inorganic coagulation material for having neither part nor lot in forming is also made to be not condensed agent pollution, it is ensured that raw material
It reuses；
4, it uses aluminum oxide content to be up to 80% or more high alumina cement as base-material, then adds pure aluminum oxide as filling
Material, the composite material and water base coagulating agent formed after being mixed well with the two generate hydrated reaction of cement high three oxidation obtained
Two aluminium content cement products make ceramic as green part；It is completely different from existing ceramic production technology: a) with high aluminum water
Mud+pure aluminum oxide powder homogeneous mixture be ceramic raw material, b) curing mechanism be hydrated reaction of cement, c) ceramics
The production of product green part follows cement forming technology；The beneficial effect is that: because the condensation of the material is based on inorganic
In-situ solidifying caused by chemically reacting between cementitious material and coagulating agent, can greatly reduce in dry and sintering process, ceramic blank
Influence of the occupy-places such as moisture, binder removing object to ceramics forming part size in part；
5, after ceramic form generates, also high-precision processing can be carried out to it as needed, improves the dimensional accuracy of green part, realized
The Forward of ceramic product cold working, effectively reduces processing cost.
Detailed description of the invention
Fig. 1 shows be the device of the invention schematic diagram in one embodiment: (1) power spreading device；(2) Forming Workpiece；(3)
Spray head or jet array；(4) formation cylinder；(5) lifting platform；(6) inorganic coagulation material；
What Fig. 2 was indicated is the technical process for making geology polymer material highly finished product；
What Fig. 3 was indicated is the technical process for making ceramic highly finished product.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, clear, complete description is carried out to technical solution of the present invention.It is retouched
The embodiment stated is only the specific embodiment of the application, rather than all.Based on the embodiment in the application, the common skill in this field
The embodiment of art personnel every other form obtained without making creative work belongs to the application protection
Range.
Embodiment one
Fig. 1 gives forming device schematic diagram of the invention in one embodiment: forming device include power spreading device 1, spray head or
Jet array 3, formation cylinder 4 and lifting platform 5, power spreading device 1 is for uniformly spreading inorganic coagulation material 6 in 5 upper surface of lifting platform
Plane is transformed into, injection apparatus 3 includes at least two groups spray head or two groups of jet arrays, wherein one group of spray head or jet array 3 are used for
The injection of entity area profile outer rim in horizontal cross-section corresponding to product resistance penetration enhancer, another group of spray head or spray head battle array in the material layer
Column 3 are used for horizontal cross-section entity area condensation by injection agent corresponding to product, lifting platform 5 in the material layer and are placed in formation cylinder 4
It is interior, elevating movement is carried out along 4 inner wall of formation cylinder, for carrying the inorganic coagulation material sprawled.
Embodiment two
The present invention provides the manufacturing process of the forming device for the increasing material manufacturing of inorganic coagulation material product of an embodiment, lead to
It crosses this method and realizes the forming of geology polymer material highly finished product.
Referring to Fig. 2, the manufacturing process the following steps are included:
1, a series of two-dimensional horizontal cross-section figures, and input forming device control will be become to the three dimensional design figure of product is discrete
Computer processed；
2, by powdered geology polymer material, resistance the raw material such as penetration enhancer (french polish) and coagulating agent (NaOH solution) loading at
Shape dress is set；
3, the powder supply mechanism in forming device paves into powdery starting material smooth and thickness about 0.1mm or so uniform thin
Layer；
4, the resistance penetration enhancer nozzle group in forming device corresponds to the horizontal cross-section to product certain height on Xiang Shangshu powder thin layer
The profile outer rim injection resistance penetration enhancer of entity part；
5, the coagulating agent nozzle group in forming device, the condensation by injection agent into the region surrounded by above-mentioned profile are condensed agent leaching
The dusty material of profit generates chemical reaction, and condensation and in-situ solidifying in the short time are formed to respective cross-section in a certain height of product
Entity thin layer；
Above-mentioned 3,4,5, three steps would be repeated for, until be fully completed to product forming process；
6, Forming Workpiece is taken out out of forming device；
7, wrapping layer is permeated in the resistance for removing Forming Workpiece surface, is further processed as needed to Forming Workpiece surface or other
Post-processing；
8, process is completed the production.
It in forming process, is wrapped in non-condensing around formed product, and is never condensed because of the setting of permeability barrier agent dirt
The inorganic coagulation material of dye, after the proper treatments such as screening, the reusable production in new workpiece.
Embodiment three
The present invention also provides the forming sides of the forming device for the increasing material manufacturing of inorganic coagulation material product of another embodiment
Method realizes ceramic highly finished product forming by this method.
Referring to Fig. 3, the method the following steps are included:
1, a series of two-dimensional horizontal cross-section figures, and input forming device control will be become to the three dimensional design figure of product is discrete
Computer processed；
2, by the uniform mixture of high alumina cement and aluminum oxide, the resistance raw material such as penetration enhancer (french polish) and water base coagulating agent
It is loaded into forming device；
3, powdery starting material is paved into the thin uniform layer of smooth and thickness about 0.1mm by the powder supply mechanism in forming device;
4, the resistance penetration enhancer nozzle group in forming device corresponds to the horizontal cross-section to product certain height on Xiang Shangshu powder thin layer
The profile outer rim injection resistance penetration enhancer of entity part；
5, the coagulating agent nozzle group in forming device, the condensation by injection agent into the region surrounded by above-mentioned profile are condensed agent leaching
The dusty material of profit generates chemical reaction, and condensation and in-situ solidifying in the short time are formed to respective cross-section in a certain height of product
Entity thin layer；
Above-mentioned 3,4,5, three steps would be repeated for, until be fully completed to product forming process；
6, the ceramic form that forming finishes is taken out out of forming device；
7, wrapping layer is permeated in the resistance for removing ceramic form surface, place after being further processed as needed to its surface or being other
Reason；
8, ceramic form is placed in moist place, solidification is after being allowed to continue to reach expected intensity；
9, high-precision processing can be carried out to green part as needed, improves the dimensional accuracy of green part；
10, the ceramic form for having reached expected intensity is put into ceramic sintering furnace and is sintered, be finally completed the system of ceramic highly finished product
It makes.
It in forming process, is wrapped in non-condensing around formed product, and is never condensed because of the setting of permeability barrier agent dirt
The high alumina cement of dye and the uniform mixed-powder material of aluminum oxide, it is reusable in new workpiece after the proper treatments such as screening
Production.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of forming device for inorganic coagulation material product increasing material manufacturing, which is characterized in that the forming device includes
Power spreading device, injection apparatus, formation cylinder and lifting platform, the power spreading device are used for inorganic coagulation material in lifting platform upper surface
Plane uniformly is sprawled into, the injection apparatus includes at least two groups spray head or two groups of jet arrays, wherein one group of spray head or spray head
Array is used for the injection of horizontal cross-section entity area profile outer rim corresponding to product resistance penetration enhancer, another group of spray head in the material layer
Or jet array is used for horizontal cross-section entity area condensation by injection agent corresponding to product, the lifting platform in the material layer and sets
In in formation cylinder, elevating movement is carried out along formation cylinder inner wall, for carrying the inorganic coagulation material sprawled.
2. forming device according to claim 1, which is characterized in that the spray head of the injection apparatus or the spray of jet array
Radio frequency rate is not less than 20KHz.
3. forming device according to claim 1 or 2, which is characterized in that for spraying the spray head or spray head battle array of resistance penetration enhancer
The viscosity of column, the liquid that can be sprayed is not less than 150CP.
4. the forming described in a kind of any one of claims 1 to 3 for the forming device of inorganic coagulation material product increasing material manufacturing
Method, which comprises the following steps:
A) powdered inorganic cementitious material is sprawled into the material layer of specified thickness by power spreading device in the plane；
B) one group of spray head or jet array the entity area profile outer rim in horizontal cross-section corresponding to product in the material layer are sprayed
Hinder penetration enhancer；
C) another group of spray head or jet array the entity area condensation by injection agent in horizontal cross-section corresponding to product in the material layer；
D) above-mentioned steps are repeated in, until completing the forming of product；
Wherein, the inorganic coagulation material and coagulating agent curing reaction form the product layer in corresponding material layer, hinder penetration enhancer
It prevents the cementitious material of coagulating agent and product outside the entity area of horizontal cross-section from reacting, and forms resistance infiltration in product surface
Wrapping layer abolishes product needed for resistance infiltration wrapping layer obtains after completing the forming of product.
5. manufacturing process according to claim 4, which is characterized in that the coagulating agent matches with inorganic coagulation material,
By one of water, waterglass, accelerator, alkali metal soln or several form.
6. manufacturing process according to claim 4, which is characterized in that the inorganic coagulation material is that cement or geology polymerize
Object also includes using inorganic coagulation material as the cement-base composite material of base-material or geopolymer composite material.
7. manufacturing process according to claim 6, which is characterized in that the cement-base composite material is cement matrix mixing
Filler material or enhancing expect that geopolymer composite material is that geo-polymer substrate mixing filler material or enhancing are expected.
8. manufacturing process according to claim 7, which is characterized in that the filler material is bone meal, in mountain flour, ceramic powder
One or more, the enhancing material is one of carbon fiber, glass fibre, mineral fibres or a variety of.
9. according to any manufacturing process of claim 7-8, which is characterized in that the filler material particle diameter distribution is D10=30
Micron, D50=50 microns, D90=80 microns, the enhancing material length is not more than 120 microns, is not less than 40 microns, and length does not surpass
90 microns of ratio is crossed not less than 90%.
10. according to any manufacturing process of claim 7-9, which is characterized in that described when the cement is high alumina cement
Filler material is ceramic powder, and ceramic powder partial size is no more than 20 microns, product formed thereby obtained after sintering as green part with
Ceramic based on ceramic phase.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910168394.4A CN109732741A (en) | 2019-03-06 | 2019-03-06 | A kind of forming device and method for inorganic coagulation material product increasing material manufacturing |
| CN202010078217.XA CN110936466A (en) | 2019-03-06 | 2020-02-03 | Forming device and method for additive manufacturing of inorganic cementing material product |
| CN202010135122.7A CN111015895A (en) | 2019-03-06 | 2020-03-02 | Forming device and method for additive manufacturing of inorganic cementing material product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910168394.4A CN109732741A (en) | 2019-03-06 | 2019-03-06 | A kind of forming device and method for inorganic coagulation material product increasing material manufacturing |
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| CN201910168394.4A Pending CN109732741A (en) | 2019-03-06 | 2019-03-06 | A kind of forming device and method for inorganic coagulation material product increasing material manufacturing |
| CN202010078217.XA Pending CN110936466A (en) | 2019-03-06 | 2020-02-03 | Forming device and method for additive manufacturing of inorganic cementing material product |
| CN202010135122.7A Pending CN111015895A (en) | 2019-03-06 | 2020-03-02 | Forming device and method for additive manufacturing of inorganic cementing material product |
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| CN202010078217.XA Pending CN110936466A (en) | 2019-03-06 | 2020-02-03 | Forming device and method for additive manufacturing of inorganic cementing material product |
| CN202010135122.7A Pending CN111015895A (en) | 2019-03-06 | 2020-03-02 | Forming device and method for additive manufacturing of inorganic cementing material product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111015895A (en) * | 2019-03-06 | 2020-04-17 | 陈勃生 | Forming device and method for additive manufacturing of inorganic cementing material product |
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| CN111943690B (en) * | 2020-08-17 | 2022-09-23 | 山西高速公路工程检测有限公司 | Mullite mixed powder, preparation method thereof and application thereof in 3D printing |
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| KR101526827B1 (en) * | 2014-12-29 | 2015-06-05 | 김석문 | 3d printing apparatus and constructing method of steel frame concrete structure using the same |
| CN104043830B (en) * | 2014-06-30 | 2016-02-24 | 湖南华曙高科技有限责任公司 | Increase material manufacturing equipment and compound rolling power spreading device, method |
| CN104191495A (en) * | 2014-09-02 | 2014-12-10 | 陈勃生 | Forming method of cement, cement-based composite material and ceramic refined products |
| CN107998455A (en) * | 2018-01-31 | 2018-05-08 | 济宁学院 | Hydroxy apatite-base bone tissue engineering scaffold and its powder 3D printing method |
| CN109732741A (en) * | 2019-03-06 | 2019-05-10 | 陈勃生 | A kind of forming device and method for inorganic coagulation material product increasing material manufacturing |
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| CN111015895A (en) * | 2019-03-06 | 2020-04-17 | 陈勃生 | Forming device and method for additive manufacturing of inorganic cementing material product |
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| CN110936466A (en) | 2020-03-31 |
| CN111015895A (en) | 2020-04-17 |
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Application publication date: 20190510 |