CN110756731A - Device and method for 3D printing of clay molding sand casting mold - Google Patents
Device and method for 3D printing of clay molding sand casting mold Download PDFInfo
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- CN110756731A CN110756731A CN201911127215.9A CN201911127215A CN110756731A CN 110756731 A CN110756731 A CN 110756731A CN 201911127215 A CN201911127215 A CN 201911127215A CN 110756731 A CN110756731 A CN 110756731A
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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
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/18—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
- B22C1/181—Cements, oxides or clays
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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
- B33Y10/00—Processes of additive manufacturing
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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
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
Abstract
A device and a method for 3D printing of clay sand molds comprise: a computer and control system, a forming system, a powder spreading system and a clay molding sand casting mold; the computer and the control system are connected with the forming system and the powder spreading system, the forming system is arranged at the upper part of the powder spreading system, and the clay molding sand casting mold is arranged in the middle of the powder spreading system. And the solution spraying system, the solvent spraying system moving device and the drying system in the forming system are connected with the forming system moving device. The powder spreading system is characterized in that powder is located above a forming area bottom plate and a powder supplementing area bottom plate, a forming area bottom plate lifting device is connected with the forming area bottom plate, a powder supplementing area bottom plate lifting device is connected with the powder supplementing area bottom plate, and the powder spreading device is installed between the solution spraying system and the drying system and is connected with a forming system moving device. The casting mold adopts a method which can keep the characteristics of low air permeability and low gas evolution and reduce the possibility of air holes in the casting.
Description
Technical Field
The invention belongs to the technical field of casting, and relates to a device and a method for 3D printing of a clay sand casting mold.
Background
At present, in the prior art, the common method for rapidly manufacturing a casting mold based on 3D printing (layered manufacturing technology) is basically to form a resin sand casting mold by spraying a resin binder and a curing agent and then binding molding sand together.
The specific method for manufacturing the resin sand casting mold in a layered mode is to divide a processed object into a plurality of parallel thin layers, and manufacture and overlap the thin layers layer by layer so as to complete the manufacturing process of the whole casting mold. The following two main manufacturing methods are commonly used: one is to selectively sinter resin-coated sand with laser. The basic method adopted is as follows: a layer of resin-coated sand is laid on a workbench, heated to a temperature slightly lower than the melting point of the resin film, and then scanned in the shape of a thin layer by using a laser beam. And melting and solidifying the scanned precoated sand surface resin film, and bonding the precoated sand into a whole to form a thin-layer entity consistent with the scanning shape. Then, a layer of precoated sand is paved above the entity, the thickness of the precoated sand is consistent with that of the thin layer, and then the laser selective sintering of the next thin layer is carried out. The newly formed thin layer and the previous thin layer are also bonded into a whole through a sintering process, and the thin layer is manufactured layer by layer until the whole resin sand casting mould is manufactured. The method has the defects of large gas evolution of resin sand casting mould, high manufacturing cost, low manufacturing efficiency, high difficulty in cleaning and removing sand from casting, and solid and gas pollution to the environment caused by resin.
The other method is to spray a curing agent or resin to the molding sand coated with the resin or the curing agent by using a spray head and then selectively cure and form the molding sand. The basic method comprises the following steps: a layer of molding sand coated with resin or curing agent is laid on a workbench, the curing agent or resin is sprayed on the surface of the molding sand by using a spray head according to the shape of a thin layer, and the sprayed molding sand is bonded into a whole after a curing reaction, so that a thin layer entity consistent with a scanning shape is formed. Then another layer of molding sand coated with resin or curing agent is laid on the solid body, the thickness of the molding sand is consistent with that of the thin layer, then the selective spray forming of the next thin layer is carried out, the newly formed thin layer and the previous thin layer are bonded into a whole through the curing action, and the manufacturing of the whole resin sand casting mold is completed through the layer-by-layer manufacturing of the thin layers. The method has the defects of large gas evolution of resin sand casting mould, high raw material cost, high difficulty in cleaning and removing sand of casting, and solid and gas pollution to the environment caused by resin.
The method uses resin to manufacture the casting mold, so the method has the problems of high raw material cost, poor collapsibility, difficult cleaning of the casting, and the like, and for the casting with higher surface quality requirement, the casting mold is often required to use finer molding sand, more resin is required to be added, the resin content of the manufactured fine sand casting mold is high, the difficulty of cleaning the casting is further increased, the air permeability of the casting mold is poor, the resin in the casting mold can be decomposed to generate more gas, the gas enters liquid metal to form a gas hole defect, and the rejection problem of the casting due to the gas hole defect is very prominent.
The clay sand casting mold is manufactured by a mold manufacturing method at present, has the advantages of small gas evolution and low raw material cost, and the fine sand is adopted to manufacture the casting mold with high surface quality, so that the characteristics of low air permeability and low gas evolution can be kept, and the possibility of air holes in the casting is reduced. The clay sand mold is produced by a method of molding a mold by mixing sand, clay, water, etc. and then solidifying the mixture. The presently disclosed resin sand 3D printing device only aims at resin sand casting molds, and resin and curing agent are adopted as curing means instead of clay and water. Adopt resin sand 3D printing apparatus, change into clay and water with resin and curing agent and print the clay sand casting mold, can not satisfy normal solidification process, the casting mold intensity of printing can be very low, except the not enough of equipment moreover, still lacks clay sand casting mold 3D and prints forming method.
Disclosure of Invention
The invention aims to provide a device for 3D printing of clay sand molds and a method for 3D printing of clay sand molds, aiming at solving the problems of 3D printing of resin sand molds.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme:
an apparatus for 3D printing clay sand molds, comprising: a computer and control system, a forming system, a powder spreading system and a clay molding sand casting mold; the computer and the control system are respectively connected with the forming system and the powder spreading system, the forming system is arranged on the upper portion of the powder spreading system, the forming system can move along the powder spreading direction of the powder spreading system, and the clay molding sand casting mold is arranged in the middle of the powder spreading system.
The forming system includes: the device comprises a solution spraying system, a solution spraying system moving device, a drying system and a forming system moving device; the solution spraying system is filled with aqueous solution, the solvent spraying system is connected with the solution spraying system moving device, the two drying systems are arranged on two sides of the solution spraying system, and the solution spraying system, the solution spraying system moving device and the drying systems are all connected with the forming system moving device.
The powder paving system comprises: the powder replenishing device comprises a forming area bottom plate lifting device, a forming area bottom plate, powder, a powder replenishing area bottom plate lifting device, a powder replenishing area bottom plate and a powder paving device; the powder is located forming area bottom plate and mends whitewashed district bottom plate top, and forming area bottom plate elevating gear is connected with forming area bottom plate, mends whitewashed district bottom plate elevating gear and is connected with mend whitewashed district bottom plate, spreads whitewashed device and installs between solution injection system and drying system to be connected with forming system mobile device.
The 3D printing method of the clay sand mold comprises the following steps: the powder for manufacturing the clay sand mold is filled into a powder laying system of equipment for standby, and the powder can be coated sand powder which is prepared by coating a layer of clay film on the surface of the molding sand and then drying the molding sand or mixed powder which is prepared by mixing the molding sand and the clay. And (3) carrying out computer section layering processing on the casting mould information model to be manufactured. Firstly, paving a layer of powder on a workbench by using a powder paving system in equipment, then driving a spraying system of the equipment to spray water or hydrosolvent by a computer according to the data information of the section shape of the casting mold, and in the process, rapidly drying the surface of the powder layer by using a drying system of the equipment to form a first layer of the casting mold in an area for spraying the water or the hydrosolvent; after the first layer is formed, the workbench descends one layer high, and then the powder spreading and spraying of the second layer are carried out. And repeating the steps until all slicing layers are finally completed. And taking out the whole stacked body, removing the powder which is not solidified, heating, solidifying and dehydrating to obtain the required casting mold. The method comprises the following specific steps:
step 1: bottom powder is laid at the bottom; firstly, controlling a forming area bottom plate lifting device through a computer and a control system, lifting the forming area bottom plate to the top, enabling the top of the forming area bottom plate to be located below the bottom of a powder paving device, then moving the forming area bottom plate downwards by more than 5mm, moving a powder supplementing area bottom plate located at one end of a powder paving system upwards under the action of the powder supplementing area lifting device, enabling the powder paving device to move towards the other end under the driving of a forming system moving device, paving redundant powder above the powder supplementing area bottom plate above the forming area bottom plate, and ensuring that the powder paving device can pave the powder above the powder supplementing area bottom plate and the forming area bottom plate into a plane by the aid of the upwards moving height of the powder supplementing area bottom plate;
step 2: laying single layer of powder; moving the bottom plate of the forming area downwards by 0.2-2 mm, and paving the powder above the bottom plate of the forming area and the bottom plate of the powder supplementing area into a plane by using a powder paving device by the same method as the step 1, wherein the preferable thickness of the powder layer is 0.2-1 mm;
and step 3: forming a single layer; under the control of a computer and a control system, a solution spraying system moving device and a forming system moving device respectively move along the front-back direction and the left-right direction, a solution spraying system sprays aqueous solution to a casting area according to the data information of the section shape of the layer of the clay casting, and powder is formed under the solidification action of water or the aqueous solution;
and 4, step 4: strengthening the single layer; rapidly drying the surface of the powder by a drying system, bonding the powder into a whole in the curing process of the aqueous solution, and forming a first single layer under the strengthening of the drying effect; the drying system in the step can dry the aqueous solution sprayed by the solution spraying system moving device in time;
and 5: manufacturing a plurality of layers; repeating the steps 2 to 4, laying powder on the next layer, spraying water or aqueous solution for solidification and forming, and performing single-layer drying and strengthening until the stacking is finally completed to form the formed clay sand mold;
step 6: and taking out the formed clay sand mold, removing the powder which is not solidified, wherein the removed powder can be reused, and putting the formed clay sand mold in an oven for further heating, solidification and dehydration to obtain the required mold, wherein the preferable heating temperature can be set to be 110 ℃.
By adopting the technical scheme, the invention can achieve the following beneficial effects:
1. compared with a resin sand casting mold for 3D printing, the prepared clay sand casting mold removes gas-generating substances such as moisture, volatile matters and the like in the binder, so that gas is not generated in the process of pouring liquid metal, the possibility of generating air holes in a casting is avoided, and the yield of complex castings is obviously improved;
2. compared with a resin sand casting mold for 3D printing, the clay casting mold uses clay as a binder and water as a dispersion medium, is harmless to human bodies and is green and environment-friendly;
3. compared with a resin sand casting mold for 3D printing, the raw material clay used by the binder of the clay casting mold is low in material price, so that the production cost can be reduced;
4. compared with a resin sand casting mold for 3D printing, the clay sand casting mold is a clay sand fine sand mold made of fine sand, and has the characteristics of high surface quality and low gas evolution of the casting mold;
5. compared with a resin sand casting mold for 3D printing, the clay molding sand casting mold has good collapsibility, and a casting is easy to remove sand;
6. when the clay sand mold is manufactured in small batches, compared with a method for manufacturing the clay sand mold through a mold manufacturing method, the clay sand mold for 3D printing does not need a mold, so that the manufacturing period is short, and the cost is low;
7. when the clay sand casting mold is manufactured in small batches, compared with a method for manufacturing the clay sand casting mold through a mold manufacturing method, the clay sand casting mold for 3D printing is high in precision, free of draft, small in mold splitting quantity in the design process, and capable of achieving integral forming of a plurality of casting molds.
Drawings
FIG. 1 is a schematic view showing the construction of an apparatus for 3D printing clay sand molds according to the present invention in an operating state;
FIG. 2 is a schematic top view of an apparatus for 3D printing clay sand molds of the present invention;
fig. 3 is a schematic view of the sectional structure a-a of fig. 2.
In the figure: 1. a computer and a control system; 2. a forming system; 2-1 solution spraying system; 2-2, a solution spraying system moving device; 2-3, a drying system; 2-4, a forming system moving device; 3. a powder spreading system; 3-1, a forming area bottom plate lifting device; 3-2, forming area bottom plate; 3-3, powder; 3-4, a bottom plate lifting device of the powder supplementing area; 3-5, a powder supplementing area bottom plate; 3-6 powder spreading device; 4. clay sand casting mould.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
As shown in fig. 1 to 3, a device for 3D printing clay sand mold includes: a computer and control system 1, a forming system 2, a powder spreading system 3 and a clay sand casting mold 4; the computer and control system 1 is respectively connected with the forming system 2 and the powder spreading system 3, the forming system 2 is arranged at the upper part of the powder spreading system 3, and the clay sand casting mold 4 is arranged at the middle part of the powder spreading system 3.
The forming system 2 comprises: the device comprises a solution spraying system 2-1, a solution spraying system moving device 2-2, a drying system 2-3 and a forming system moving device 2-4; the solution spraying system 2-1 is filled with water or aqueous solution, the solution spraying system 2-1 is connected with the solution spraying system moving device 2-2, the two drying systems 2-3 are arranged at two sides of the solution spraying system 2-1, and the solution spraying system 2-1, the solution spraying system moving device 2-2 and the drying systems 2-3 are all connected with the forming system moving device 2-4.
The powder laying system 3 includes: a forming area bottom plate lifting device 3-1, a forming area bottom plate 3-2, powder 3-3, a powder supplementing area bottom plate lifting device 3-4, a powder supplementing area bottom plate 3-5 and a powder paving device 3-6; the powder 3-3 is positioned above a forming area bottom plate 3-1 and a powder supplementing area bottom plate 3-5, a forming area bottom plate lifting device 3-1 is connected with the forming area bottom plate 3-2, a powder supplementing area bottom plate lifting device 3-4 is connected with the powder supplementing area bottom plate 3-5, a powder spreading device 3-6 is arranged between a solution spraying system 2-1 and a drying system 2-3 and is connected with a forming system moving device 2-4, and preferably, the powder spreading device 3-6 can use a powder spreading roller or a scraping blade.
The 3D printing method of the clay sand mold comprises the following steps: powder 3-3 for manufacturing a clay sand mold 4 is filled into a powder spreading system 3 in equipment for standby, and the powder 3-3 can be precoated sand powder prepared by covering a clay film on the surface of molding sand and then drying the clay film, or can be mixed powder prepared by mixing the molding sand and the clay. And (3) carrying out computer section layering processing on the casting mould information model to be manufactured. Firstly, paving a layer of powder 3-3 on a workbench by using a powder paving system 3 in equipment, then driving a solvent spraying system 2-1 in the equipment to spray water or aqueous solution by using a computer and a control system 1 according to the data information of the section shape of the casting mold, and in the process, quickly drying the surface of the powder layer by using a drying system 2-3 in the equipment to form a first layer of a clay sand casting mold 4 model in a region for spraying the water or the aqueous solution; after the first layer is formed, the workbench descends one layer high, and then the powder spreading and spraying of the second layer are carried out. And repeating the steps until all slicing layers are finally completed. And taking out the whole stacked body, removing the powder which is not solidified, heating, solidifying and dehydrating to obtain the required casting mold. The method comprises the following specific steps:
step 1: bottom powder is laid at the bottom. Firstly, a forming area bottom plate lifting device 3-1 is controlled by a computer and control system 1, the forming area bottom plate 3-2 is lifted to the top, the top of the forming area bottom plate 3-2 is positioned below the bottom of a powder spreading device 3-6, then the bottom plate 3-2 of the forming area is moved downwards by more than 5mm, the bottom plate 3-5 of the powder supplementing area at one end of the powder laying system 3 is moved upwards by a certain height under the action of a lifting device 3-4 of the powder supplementing area, the powder paving device 3-6 is driven by the forming system moving device 2-4 to move towards the other end, redundant powder 3-3 above the powder supplementing area bottom plate 3-5 is paved above the forming area bottom plate 3-2, and the upward moving height of the powder supplementing area bottom plate 3-5 ensures that the powder paving device 3-6 can pave the powder 3-3 above the powder supplementing area bottom plate 3-5 and the powder 3-3 above the forming area bottom plate 3-2 into a plane;
step 2: and laying a single layer of powder. Moving the bottom plate 3-2 of the forming area downwards by 0.2-2 mm, and paving the powder 3-3 above the bottom plate 3-2 of the forming area and the bottom plate 3-5 of the powder supplementing area into a plane by using a powder paving device 3-6 by the same method as the step 1, wherein the thickness of the powder 3-3 layer is preferably 0.2-1 mm;
and step 3: and (4) forming a single layer. Under the control of the computer and control system 1, the solution spraying system moving device 2-2 and the forming system moving device 2-4 move along the front-back direction and the left-right direction respectively, water or aqueous solution is sprayed to the casting area by the solution spraying system 2-1 according to the data information of the section shape of the layer of the clay sand casting mold 4, and the powder 3-3 is formed under the solidification action of the water or the aqueous solution;
and 4, step 4: and (4) strengthening the single layer. The drying system 2-3 rapidly dries the surface of the powder 3-3, the powder 3-3 is bonded into a whole in the curing process of water or aqueous solution, and a first single layer is formed under the strengthening of the drying effect; the drying system in the step can dry the water or the aqueous solution sprayed by the solution spraying system moving device 2-2 in time, and can improve the strength of the formed casting mold, and the traditional 3D printing and forming process of the resin sand casting mold does not need to dry the resin;
and 5: and (4) manufacturing multiple layers. Repeating the steps 2 to 4, laying powder on the next layer, spraying water or aqueous solution for solidification and forming, and performing single-layer drying and strengthening until the stacking is finally completed to form the formed clay sand casting mold 4;
step 6: and taking out the formed clay sand mold 4, removing the powder 3-3 which is not solidified, wherein the removed powder 3-3 can be reused, and putting the formed clay sand mold 4 in an oven for further heating, solidification and dehydration to obtain the required mold, wherein the preferable heating temperature can be set to be 110 ℃.
3D printing clay sand mold, wherein the powder 3-3 is covering clay powder of refractory foundry sand or mechanical mixed powder of refractory foundry sand and clay. The casting refractory molding sand is quartz sand, ceramsite sand, chromite sand or olivine sand, and the preferred particle size of the molding sand is 70/140 meshes.
The method for 3D printing of the clay sand mold comprises the step of spraying water or a water-based solution by using a spraying system.
According to the technical scheme, the clay sand casting mold can be directly printed, the clay and the aqueous solution are used as raw materials, the drying system is used for drying moisture to realize solidification forming and mold strengthening, compared with a method for 3D printing of the resin sand casting mold in the background technology, the manufactured clay sand casting mold has the advantages of small gas evolution amount and low raw material cost, the process of manufacturing the high-surface-quality casting mold by adopting fine sand can keep the characteristics of low gas permeability and low gas evolution amount, and the possibility of gas holes in a casting is reduced.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, improvement and the like made within the spirit of the present invention shall be included in the scope of the protection of the claims of the present invention.
Claims (4)
1. An apparatus for 3D printing clay sand molds, comprising: a computer and control system (1), a forming system (2), a powder spreading system (3) and a clay sand casting mold (4); the method is characterized in that: computer and control system (1) are connected with forming system (2) and shop's powder system (3) respectively, and forming system (2) sets up in shop's powder system (3) upper portion, and forming system (2) can move along the shop's powder direction of shop's powder system (3), and clay molding sand casting mould (4) set up in shop's powder system (3) middle part.
2. The apparatus for 3D printing of clay sand molds according to claim 1, wherein: the forming system (2) comprises: the device comprises a solution spraying system (2-1), a solution spraying system moving device (2-2), a drying system (2-3) and a forming system moving device (2-4); the solution spraying system (2-1) is filled with aqueous solution, the solvent spraying system (2-1) is connected with the solution spraying system moving device (2-2), the two drying systems (2-3) are arranged at two sides of the solution spraying system (2-1), and the solution spraying system (2-1), the solution spraying system moving device (2-2) and the drying systems (2-3) are all connected with the forming system moving device (2-4).
3. The apparatus for 3D printing of clay sand molds according to claim 1, wherein: the powder spreading system (3) comprises: a forming area bottom plate lifting device (3-1), a forming area bottom plate (3-2), powder (3-3), a powder supplementing area bottom plate lifting device (3-4), a powder supplementing area bottom plate (3-5) and a powder spreading device (3-6); the powder (3-3) is positioned above the forming area bottom plate (3-1) and the powder supplementing area bottom plate (3-5), the forming area bottom plate lifting device (3-1) is connected with the forming area bottom plate (3-2), the powder supplementing area bottom plate lifting device (3-4) is connected with the powder supplementing area bottom plate (3-5), and the powder spreading device (3-6) is installed between the solution spraying system (2-1) and the drying system (2-3) and is connected with the forming system moving device (2-4).
4. The apparatus for 3D printing of clay sand molds according to claim 1, wherein: the method for 3D printing of the clay sand mold comprises the following specific steps:
step 1: bottom powder is laid at the bottom; firstly, a forming area bottom plate lifting device (3-1) is controlled by a computer and a control system (1) to lift a forming area bottom plate (3-2) to the top, the top of the forming area bottom plate (3-2) is positioned below the bottom of a powder spreading device (3-6), then the forming area bottom plate (3-2) is moved downwards by more than 5mm, a powder supplementing area bottom plate (3-5) positioned at one end of the powder spreading system (3) is moved upwards under the action of the powder supplementing area lifting device (3-4), a powder spreading device (3-6) is driven by a forming system moving device (2-4) to move towards the other end, redundant powder (3-3) above the powder supplementing area bottom plate (3-5) is spread above the forming area bottom plate (3-2), and the upward moving height of the powder supplementing area bottom plate (3-5) ensures that the powder spreading device (3-6) can enable the powder supplementing area bottom plate (3-5) and the forming area bottom plate (3-6) to move upwards (3-2) spreading the powder (3-3) above the powder to form a plane;
step 2: laying single layer of powder; moving the forming area bottom plate (3-2) downwards by 0.2-2 mm, and paving the powder (3-3) above the forming area bottom plate (3-2) and the powder supplementing area bottom plate (3-5) into a plane by using a powder paving device (3-6) by the same method as the step 1, wherein the thickness of the powder (3-3) layer is preferably 0.2-1 mm;
and step 3: forming a single layer; under the control of a computer and a control system (1), a solution spraying system moving device (2-2) and a forming system moving device (2-4) respectively move along the front-back direction and the left-right direction, a water solution is sprayed to a casting area by the solution spraying system (2-1) according to the data information of the slice shape of the clay casting (4), and the powder (3-3) is formed under the solidification action of water or the water solution;
and 4, step 4: strengthening the single layer; rapidly drying the surface of the powder (3-3) by a drying system (2-3), wherein the powder (3-3) is bonded into a whole in the curing process of the aqueous solution, and a first single layer is formed under the strengthening of the drying effect; the drying system in the step can dry the water solution sprayed by the solution spraying system moving device (2-2) in time;
and 5: manufacturing a plurality of layers; repeating the steps 2 to 4, laying powder on the next layer, spraying water or aqueous solution for solidification and forming, and carrying out single-layer drying and strengthening until the stacking is finally completed to form a formed clay sand casting mold (4);
step 6: taking out the formed clay sand mold 4, removing the powder (3-3) which is not solidified, wherein the removed powder (3-3) can be reused, putting the formed clay sand mold 4 in an oven for further heating, solidifying and dehydrating to obtain the required mold, and the preferable heating temperature can be set to be 110 ℃.
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| CN201911127215.9A CN110756731A (en) | 2019-11-18 | 2019-11-18 | Device and method for 3D printing of clay molding sand casting mold |
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| CN201911127215.9A CN110756731A (en) | 2019-11-18 | 2019-11-18 | Device and method for 3D printing of clay molding sand casting mold |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114289685A (en) * | 2022-01-12 | 2022-04-08 | 南京航空航天大学 | Multi-material composite sand mold forming method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114289685A (en) * | 2022-01-12 | 2022-04-08 | 南京航空航天大学 | Multi-material composite sand mold forming method and device |
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