CN112222358B - 3D prints forming device - Google Patents
3D prints forming device Download PDFInfo
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- CN112222358B CN112222358B CN202011046583.3A CN202011046583A CN112222358B CN 112222358 B CN112222358 B CN 112222358B CN 202011046583 A CN202011046583 A CN 202011046583A CN 112222358 B CN112222358 B CN 112222358B
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- sand
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention discloses a 3D printing forming device, and belongs to the field of additive manufacturing. The device comprises a molding sand pretreatment system, a vacuum sand feeding and feeding system, a sand laying and printing integrated system, a mobile platform and a control system. The device designs a sanding and printing integrated system, the system can realize the manufacture of a plurality of layers of sand molds in a single sanding and printing stroke, and meanwhile, the integrated reciprocating bidirectional printing and forming of sanding and printing can be realized. The device can realize the high-efficient 3D of large-scale casting sand mould and print the shaping, has very strong using value widely.
Description
Technical Field
The invention belongs to the field of additive manufacturing, and particularly relates to a 3D printing forming device.
Background
The sand mold 3D printing technology is a sand mold rapid manufacturing technology based on a layered manufacturing principle. At present, most of sand mold 3D printing technologies are rapid forming methods based on powder beds, in the forming process, molding sand particles and a certain amount of curing agents need to be mixed and stirred firstly, the molding sand is filled into a sand paving hopper, then a liftable working platform descends for a fixed height, the sand paving hopper moves on the liftable working platform for sand paving, after the sand paving is completed, a computer controls a printing nozzle to spray adhesives on the surface of a sand layer according to the contour information of the current layer of the sand mold, when the sprayed resin adhesives meet the molding sand premixed with the curing agents, the sand particles are bonded and cured into the current layer of the sand mold, then the liftable working platform descends for a fixed layer thickness, the sand paving and printing processes are repeated, and finally the required sand mold is printed layer by layer. After the sand mold is manufactured, the sand mold needs to be solidified for 2 to 3 hours at normal temperature so as to obtain higher sand mold strength and can be taken out.
The existing sand mold 3D printing and forming device still has the problems of multiple sand mold manufacturing processes, low forming efficiency, poor sand mold performance and the like, and cannot meet the production requirements of enterprises.
Disclosure of Invention
The invention provides a 3D printing forming device, which aims to solve the problems of more sand mold manufacturing procedures, low forming efficiency, poor sand mold performance and the like of the conventional sand mold 3D printing forming device.
The 3D printing forming device comprises: the system comprises a molding sand pretreatment system (1), a vacuum sand feeding and feeding system (2), a sand laying and printing integrated system (3), a moving platform (4) and a control system (5);
the molding sand pretreatment system (1) is positioned outside the sand paving and printing integrated system (3), is connected with the vacuum sand feeding and supplying system (2), and is used for providing molding sand particles mixed with a curing agent; the vacuum sanding and feeding system (2) is fixedly connected to one end of the sanding and printing integrated system (3) and is used for storing the molding sand particles mixed with the curing agent and uniformly filling the molding sand particles mixed with the curing agent into the sanding and printing integrated system (3); the moving platform (4) is located at the middle position of the bottom of the sanding and printing integrated system (3) and serves as a printing sand mold forming platform and can move horizontally.
When the 3D printing forming device works, the molding sand pretreatment system (1), the vacuum sand feeding and feeding system (2), the sand paving and printing integrated system (3) and the movable platform (4) are respectively and independently initialized, detected and operated in an operation state under the control of the control system (5). Wherein, molding sand preprocessing system (1) is responsible for carrying out the quantitative mixing stirring with former sand granule and curing agent to the molding sand after will stirring is deposited to the molding sand holding box, and when the molding sand memory space in the molding sand holding box reached rated value, sand and feeding system (2) can go on the sand process in the vacuum, and when the molding sand memory space in the molding sand holding box reached maximum value, molding sand preprocessing system (1) stop work. The vacuum sand feeding and feeding system (2) performs vacuum sand feeding and feeding procedures according to the storage amount of the medium-sized sand in the sand feeding box, when the storage amount of the medium-sized sand in the sand feeding box is insufficient, the vacuum sand feeding and feeding system (2) detects the molding sand storage state of the molding sand pretreatment system (1), when the storage amount of the molding sand reaches a rated value, the vacuum sand feeding and feeding system (2) starts to work, when the storage amount of the medium-sized sand in the sand feeding box reaches the rated value, and the vacuum sand feeding and feeding system (2) stops working. The sanding and printing integrated system (3) detects the initial state of the mobile platform and the storage amount of the molding sand in the plurality of sanding grooves, after the mobile platform moves to a working position, and the storage amount of the molding sand in the sanding grooves reaches a rated value, the sanding and printing integrated system (3) starts to independently run a multilayer sanding and printing process, and when the multilayer sanding and printing process is completed, the sanding and printing integrated system (3) rises along the Z direction to preset the thickness of the sand mold. When the molding sand memory space in the sand paving groove is not enough, the sand paving and printing integrated system (3) moves to the initial position, and the sand loading process is carried out on the sand paving groove by the vacuum sand loading and feeding system (2).
Furthermore, the sanding and printing integrated system (3) is positioned above the moving platform (4) and comprises an X-direction beam (3-1), X-direction moving modules (3-2-1 and 3-2-2), X-direction moving motors (3-3-1 and 3-3-2), a sanding and printing movable gantry (3-4), a sanding and printing device (3-5), a sanding and printing Z-direction moving module (3-6-1 and 3-6-2) and a sanding and printing Z-direction moving motor (3-7-1 and 3-7-2); the X-direction moving motors (3-3-1 and 3-3-2) are installed on the sanding printing movable gantry (3-4) and connected with X-direction moving modules (3-2-1 and 3-2-2) installed on the X-direction beam (3-1) and used for driving the sanding printing movable gantry (3-4) to move along the X-direction beam (3-1); the sanding printing Z-direction moving modules (3-6-1, 3-6-2) and the sanding printing Z-direction moving motors (3-7-1, 3-7-2) are all installed on the sanding printing moving gantry (3-4) and are connected with each other, and the sanding printing device (3-5) is connected with the sanding printing Z-direction moving modules (3-6-1, 3-6-2) and driven by the sanding printing Z-direction moving motors (3-7-1, 3-7-2) to realize Z-direction lifting movement.
Furthermore, the sanding printing device (3-5) comprises a full-breadth combined printing spray head module I (3-5-1-1), a full-breadth combined printing spray head module II (3-5-1-2), a sanding groove I (3-5-2-1), a sanding groove II (3-5-2-2), a sanding groove III (3-5-2-3), a sanding groove IV (3-5-2-4), an infrared heating pipe I (3-5-3-1), an infrared heating pipe II (3-5-3-2), an infrared heating pipe III (3-5-3-3), an infrared heating pipe IV (3-5-3-4), a powder spreading roller I (3-5-4-1), And the powder paving roller II (3-5-4-2) and the powder paving roller III (3-5-4-3) are used for realizing the paving, printing and forming of the two-layer sand mold in one sand paving and printing process.
Furthermore, the full-breadth combined printing spray head module (3-5-1), the sand paving groove (3-5-2), the infrared heating pipe (3-5-3) and the powder paving roller (3-5-4) are fixedly connected in a set, and are used for realizing sand paving and printing integrated forming.
Furthermore, the powder paving roller I (3-5-4-1) is fixedly connected to the left side of the sand paving groove I (3-5-2-1), the sand paving groove I (3-5-2-1) is fixedly connected to the left side of the infrared heating pipe I (3-5-3-1), the infrared heating pipe I (3-5-3-1) is fixedly connected to the left side of the full-breadth combined printing nozzle module I (3-5-1-1), the full-breadth combined printing nozzle module I (3-5-1-1) is fixedly connected to the left side of the infrared heating pipe II (3-5-3-2), the infrared heating pipe II (3-5-3-2) is fixedly connected to the left side of the sand paving groove II (3-5-2-2), the sand paving groove II (3-5-2-2) is fixedly connected to the left side of the sand paving roller II (3-5-4-2), the powder paving roller II (3-5-4-2) is fixedly connected to the left side of the sand paving groove III (3-5-2-3), the sand paving groove III (3-5-2-3) is fixedly connected to the left side of the infrared heating pipe III (3-5-3-3), the infrared heating pipe III (3-5-3-3) is fixedly connected to the left side of the full-breadth combined printing spray head module II (3-5-1-2), the full-breadth combined printing spray head module II (3-5-1-2) is fixedly connected to the left side of the infrared heating pipe IV (3-5-3-4), the infrared heating pipe IV (3-5-3-4) is fixedly connected to the left side of the sand paving groove IV (3-5-2-4), and the sand paving groove IV (3-5-2-4) is fixedly connected to the left side of the powder paving roller III (3-5-4-3) and used for realizing reciprocating bidirectional sand paving, printing and integrated forming of two layers of sand molds. The distance between the current sanding surface and the powder paving roller II (3-5-4-2) is h, and the distance between the powder paving roller I (3-5-4-1) and the distance between the powder paving roller III (3-5-4-3) and the current sanding surface are 2h respectively.
Furthermore, the reciprocating bidirectional sanding, printing and integrated forming of the two-layer sand mold requires two full-width combined printing spray head modules (3-5-1), four sanding grooves (3-5-2), four infrared heating pipes (3-5-3) and three powder paving rollers (3-5-4).
Furthermore, the reciprocating bidirectional sanding, printing and integrated forming of the three-layer sand mold requires four full-width combined printing spray head modules (3-5-1), six sanding grooves (3-5-2), six infrared heating pipes (3-5-3) and five powder paving rollers (3-5-4).
Furthermore, the relation between the number of the full-width combined printing spray head modules (3-5-1), the sand paving grooves (3-5-2), the infrared heating pipes (3-5-3) and the powder paving rollers (3-5-4) in the sand paving and printing devices (3-5) and the number of layers n is respectively 2n-2, 2n and 2n-1, and the structure layout is optimized.
Furthermore, the height difference between the powder spreading rollers of the sanding and printing integrated device (3-5) and the upper surface of the movable platform (4) is not completely the same.
Further, the full-width combined printing nozzle modules (3-5-1), the sand paving grooves (3-5-2), the infrared heating pipes (3-5-3) and the powder paving rollers (3-5-4) are installed in a mirror image layout mode relative to a certain powder paving roller in the middle, and are used for achieving reciprocating bidirectional sand paving, printing and integrated forming of the multilayer sand mold.
Furthermore, the molding sand pretreatment system (1) comprises a raw sand storage warehouse (1-1), a vertical feeding machine (1-2), a material fixing barrel (1-3), an electric butterfly valve (1-4), a curing agent storage barrel (1-6), a curing agent metering pump (1-5), a sand mixer (1-7) and a molding sand storage box (1-8); the vertical feeding machine (1-2) is fixedly connected with the raw sand storage warehouse (1-1) and the sizing barrel (1-3) and is used for feeding raw sand particles stored in the raw sand storage warehouse (1-1) into the sizing barrel (1-3); the electric butterfly valve (1-4) is arranged at an outlet below the fixed charging barrel (1-3) and used for opening and closing the outlet of the fixed charging barrel and controlling the quality of the raw sand entering the sand mixer (1-7); the curing agent metering pump (1-5) is fixedly connected with the curing agent storage barrel (1-6) and the sand mixer (1-7) and is used for quantitatively conveying the curing agent stored in the curing agent storage barrel (1-6) into the sand mixer (1-7); the molding sand storage box (1-8) is arranged at an outlet of the sand mixer (1-7) and used for storing molding sand particles mixed with a curing agent.
Furthermore, the vacuum sand feeding and feeding system (2) is fixedly connected with the sand paving and printing integrated system (3) and is positioned at one end of the sand paving and printing integrated system (3), and comprises a vacuum sand feeding machine (2-1), a vacuum charging bucket (2-2), a sand feeding box (2-3), a sand feeding beam (2-4), a sand feeding gantry (2-5), sand feeding beam Z-direction moving modules (2-6-1 and 2-6-2), sand feeding beam Z-direction moving motors (2-7-1 and 2-7-2) and a sand feeding gantry (2-5); wherein the vacuum sand feeder (2-1) is connected with the molding sand storage tank (1-8) and the vacuum feeding barrel (2-2) and is used for sucking the molding sand particles stored in the molding sand storage tank (1-8) into the vacuum feeding barrel (2-2); the sand feeding box (2-3) is arranged on the sand feeding beam (2-4) and connected with the vacuum feeding barrel (2-2) and used for storing the molding sand particles; the Z-direction moving modules (2-6-1 and 2-6-2) of the upper sand beam are arranged on the upper sand gantry (2-5) and are fixedly connected with the upper sand beam (2-4), so that the Z-direction movement can be realized; the sand feeding beam Z-direction moving motors (2-7-1 and 2-7-2) are arranged on the sand feeding gantry (2-5) and connected with the sand feeding beam Z-direction moving modules (2-6-1 and 2-6-2) for driving the sand feeding beam Z-direction moving modules (2-6-1 and 2-6-2) to move; the upper sand gantry (2-5) is fixedly connected with the sand paving and printing integrated system (3).
Furthermore, the moving platform (4) is positioned in the middle of an X-direction cross beam (3-1) of the sanding and printing integrated system (3), and comprises a movable platform trolley (4-1) and an X-direction moving slide rail (4-2) for realizing the reciprocating motion of the moving platform at a printing working position and a sand type cleaning working position.
Further, the control system (5) is used for realizing automatic operation of the 3D printing and forming device.
The invention has the following advantages:
1. the forming device adopts modularized independent operation, has simple structure and is suitable for large-scale equipment;
2. the multilayer sand mould single process once takes shape, and the sand mould manufacturing efficiency is high.
Drawings
FIG. 13D is a view showing the structure of a printing apparatus;
FIG. 2 is a view showing the construction of a molding sand pretreatment system;
FIG. 3 shows a structure diagram of a vacuum sanding and feeding system;
FIG. 4 shows a structure of the sanding and printing integrated system;
FIG. 5 shows a structure of the sanding and printing integrated system;
FIG. 6 is a block diagram of a mobile platform;
FIG. 7 is a diagram of an integrated forming process of reciprocating bidirectional sanding and printing of two layers of sand molds in the X + direction;
FIG. 8 is a diagram of an X-direction two-layer sand mold reciprocating bidirectional sanding printing integrated forming process;
in the figure, 1-a molding sand pretreatment system; 2-a vacuum sand feeding and feeding system; 3, sanding and printing integrated system; 4-moving the platform; 5-a control system;
1-1 storing a raw sand box; 1-2, vertically feeding a hopper; 1-3 of a material fixing barrel; 1-4 electric butterfly valves; 1-5 curing agent metering pumps; 1-6 curing agent storage barrels; 1-7 sand mixer; 1-8 molding sand storage boxes; 2-1, feeding a sand machine in vacuum; 2-2, vacuum feeding a barrel; 2-3, sanding; 2-4, sanding the beam; 2-5, sanding the gantry; 2-6-1, a sand feeding beam Z-direction moving module; 2-6-2, a sand feeding beam Z-direction moving module; 2-7-1, moving a sand beam in the Z direction; 2-7-2, moving a sand beam in the Z direction; a 3-1X-direction beam; 3-2-1X direction moving module; 3-2-2X direction moving module; 3-3-1X direction moving motor; a 3-3-2X direction moving motor; 3-4 sanding and printing the gantry; 3-5 sanding printing device; 3-5-1 full-width combined printing spray head module; 3-5-2 multiple sand paving grooves; 3-5-3 red heating pipes; 3-5-4 powder spreading rods; 3-5-1-1 full-width combined printing spray head module I; 3-5-1-2 full-width combined printing spray head module II; 3-5-2-1 paving a sand trough I; 3-5-2-2 sanding groove II; 3-5-2-3 paving a sand groove III; 3-5-2-4 paving a sand groove IV; 3-5-3-1 infrared heating tube I; 3-5-3-2 infrared heating tube II; 3-5-3-3 infrared heating tube III; 3-5-3-4 infrared heating tube IV; 3-5-4-1, spreading a powder stick I; 3-5-4-2 powder spreading rods II; 3-5-4-3 powder spreading stick III; 3-6-1 sanding and printing a Z-direction moving module; 3-6-2 sanding and printing a Z-direction moving module; 3-7-1 sanding and printing a Z-direction moving motor; 3-7-2 sanding and printing a Z-direction moving motor; 4-1 movable platform trolley; 4-2X-direction moving slide rails; a printing part; b, paving sand.
Detailed Description
The utility model provides a 3D prints forming device includes five parts of molding sand pretreatment systems (1), sand and feed system (2) in the vacuum, sanding printing integration system (3), moving platform (4) and control system (5). When the 3D printing forming device works, the molding sand pretreatment system (1), the vacuum sand feeding and feeding system (2), the sand paving and printing integrated system (3) and the mobile platform (4) are respectively and independently initialized, detected and operated in the operation state under the control of the control system (5).
The invention provides a 3D printing forming device, wherein the specific implementation mode of the reciprocating bidirectional sanding and printing integrated forming of two layers of sand molds is as follows:
the method comprises the following steps: before the 3D printing forming device works, three-dimensional modeling is carried out on a model to be printed, then layering slicing is carried out on the three-dimensional model, and then the sanding and printing integrated system (3) carries out model printing according to slicing information.
Step two: before the sand paving and printing process begins, raw sand particles stored in a raw sand storage box (1-1) are conveyed into a sizing barrel (1-3) through a spiral auger structure of a vertical feeding machine (1-2), and an electric butterfly valve (1-4) is used for opening and closing an outlet of the sizing barrel (1-3) to control the quality of the raw sand entering a sand mixer (1-7); quantitatively feeding the curing agent stored in the curing agent storage barrel (1-6) into a sand mixer (1-7) through a curing agent metering pump (1-5); mixing and stirring the raw sand particles and the curing agent in a sand mixer (1-7), and storing the sand mold of the molding sand particles with the pre-mixed curing agent in a molding sand storage box (1-8).
Step three: the vacuum sand feeding machine (2-1) sucks the molding sand particles stored in the molding sand storage box (1-8) into the vacuum feeding barrel (2-2), and the molding sand particles premixed with the curing agent in the vacuum feeding barrel (2-2) are stored in the sand feeding box (2-3).
In the course of the work, when the molding sand memory space in the molding sand storage box reaches rated value, sand and feeding system (2) can go on the sand process in the vacuum, and when the molding sand memory space in the molding sand storage box reached maximum value, molding sand preprocessing system (1) stopped working. The vacuum sand feeding and feeding system (2) performs vacuum sand feeding and feeding procedures according to the storage amount of the medium-sized sand in the sand feeding box, when the storage amount of the medium-sized sand in the sand feeding box is insufficient, the vacuum sand feeding and feeding system (2) detects the molding sand storage state of the molding sand pretreatment system (1), when the storage amount of the molding sand reaches a rated value, the vacuum sand feeding and feeding system (2) starts to work, when the storage amount of the medium-sized sand in the sand feeding box reaches the rated value, and the vacuum sand feeding and feeding system (2) stops working. The sanding and printing integrated system (3) detects the initial state of the mobile platform and the storage amount of the molding sand in the plurality of sanding grooves, after the mobile platform moves to a working position, and the storage amount of the molding sand in the sanding grooves reaches a rated value, the sanding and printing integrated system (3) starts to independently run a multilayer sanding and printing process, and when the multilayer sanding and printing process is completed, the sanding and printing integrated system (3) rises along the Z direction to preset the thickness of the sand mold. When the molding sand memory space in the sand paving groove is not enough, the sand paving and printing integrated system (3) moves to the initial position, and the sand loading process is carried out on the sand paving groove by the vacuum sand loading and feeding system (2).
Step four: after the sand filling process is finished, uniformly filling the molding sand particles mixed with the curing agent in the sand filling box (2-3) into a plurality of sand paving grooves (3-5-2) of the sand paving and printing integrated system (3); the two-layer sand mold reciprocating bidirectional sanding and printing integrated forming device comprises two full-breadth combined printing spray head modules (3-5-1), four sanding grooves (3-5-2), four infrared heating pipes (3-5-3) and three powder paving rollers (3-5-4).
Step five: before the sand paving printing device works, firstly, sand particles premixed with a curing agent are paved on a printing platform (4-1) in advance, as shown in a graph 7(a), the thickness of the sand paving layer is H, and H is more than or equal to H.
Step six: when the sand spreading and printing device moves in the positive X direction, the full-width combined printing nozzle module II (3-5-1-2) firstly performs resin injection on the surfaces of the molding sand particles premixed with the curing agent, and the infrared heating pipe III (3-5-3-3) performs heating and curing on the current layer of molding sand as shown in fig. 7 (b); and then opening a sand paving groove III (3-5-2-3) to perform a shakeout process, and paving sand on the current layer by a powder paving roller II (3-5-4-2) to enable the molding sand on the current layer to be paved as shown in a figure 7(c), wherein the distance between the powder paving roller II (3-5-4-2) and the current sand paving surface is h. Furthermore, the full-width combined printing nozzle module I (3-5-1-1) performs resin injection, and the infrared heating pipe I (3-5-3-1) performs heating on the current layer of sand mold, so that the current layer of sand mold has certain strength as shown in fig. 7 (d); and finally, opening a sand paving groove I (3-5-2-1) of the sand box, continuing to perform second shakeout, and performing second molding sand treatment on the powder paving roller I (3-5-4-1) to pave the molding sand of the second layer as shown in fig. 7 (e). At this time, the X-positive sanding printing process is finished, and two-layer printing is completed, and two-layer sanding is performed as shown in fig. 8 (a).
Step seven: when the sanding printing device moves along the negative X direction, the sanding printing device (3-5) is firstly raised for 2h along the positive Z direction. Then the full-width combined printing nozzle module I (3-5-1-1) performs resin injection on the current layer to complete printing on the current layer, and the infrared heating pipe II (3-5-3-2) performs heating on the sand mould of the current layer to enable the sand mould of the current layer to have certain strength as shown in a figure 8 (b); and opening a sand paving groove II (3-5-2-2) to perform a shakeout process, and performing sand paving treatment on the current layer (the third layer) by using a powder paving roller II (3-5-4-2) to enable the molding sand of the current layer to be paved as shown in a figure 8 (c). Subsequently, the full-width combined printing nozzle module II (3-5-1-2) performs resin injection, and the infrared heating pipe IV (3-5-3-4) performs heating on the current layer sand mold, so that the current layer sand mold has certain strength as shown in a figure 8 (d); and finally, opening a sand laying groove I (3-5-2-1) of the sand box, continuing to perform fourth shakeout as shown in the figure 8(e), and performing fourth layer molding sand treatment on the powder laying roller I (3-5-4-1) to lay the fourth layer of molding sand flat. At the moment, the sand paving and printing process in the X negative direction is finished, two-layer printing is finished, sand paving is carried out twice, and the reciprocating bidirectional sand paving and printing process of the two-layer sand mold is completely finished. The printing efficiency was four times that before.
The relation between the number of the full-width combined printing spray head modules (3-5-1), the sand paving grooves (3-5-2), the infrared heating pipes (3-5-3) and the powder paving rollers (3-5-4) in the sand paving and printing devices (3-5) and the number of layers n is respectively 2n-2, 2n and 2n-1, and the sand paving and printing devices are used for optimizing structural layout. The height difference between a plurality of powder spreading rollers of the sanding and printing integrated device (3-5) and the upper surface of the movable platform (4) is not completely the same. The full-breadth combined printing spray head module comprises a plurality of full-breadth combined printing spray head modules (3-5-1), a plurality of sand paving grooves (3-5-2), a plurality of infrared heating pipes (3-5-3) and a plurality of powder paving rollers (3-5-4), wherein the powder paving rollers are arranged in a mirror image mode relative to a certain middle powder paving roller, and the full-breadth combined printing spray head module is used for realizing reciprocating bidirectional sand paving and printing integrated forming of a multilayer sand mold.
Step eight: and carrying out reciprocating printing according to the slice information, overlapping layer by layer, and further printing to finish the required sand mold.
Claims (7)
1. A3D printing forming device is characterized in that the device comprises: the system comprises a molding sand pretreatment system (1), a vacuum sand feeding and feeding system (2), a sand laying and printing integrated system (3), a moving platform (4) and a control system (5);
the sanding and printing integrated system (3) comprises: the full-breadth combined printing spray head module I (3-5-1-1), the full-breadth combined printing spray head module II (3-5-1-2), the sanding groove I (3-5-2-1), the sanding groove II (3-5-2-2), the sanding groove III (3-5-2-3), the sanding groove IV (3-5-2-4), the infrared heating pipe I (3-5-3-1), the infrared heating pipe II (3-5-3-2), the infrared heating pipe III (3-5-3-3), the infrared heating pipe IV (3-5-3-4), the powder paving roller I (3-5-4-1), the powder paving roller II (3-5-4-2), The powder paving roller III (3-5-4-3) is used for paving, printing and forming two layers of sand molds in one sand paving and printing process;
the powder paving roller I (3-5-4-1) is fixedly connected to the left side of the sand paving groove I (3-5-2-1), the sand paving groove I (3-5-2-1) is fixedly connected to the left side of the infrared heating pipe I (3-5-3-1), the infrared heating pipe I (3-5-3-1) is fixedly connected to the left side of the full-breadth combined printing spray head module I (3-5-1-1), the full-breadth combined printing spray head module I (3-5-1-1) is fixedly connected to the left side of the infrared heating pipe II (3-5-3-2), the infrared heating pipe II (3-5-3-2) is fixedly connected to the left side of the sand paving groove II (3-5-2-2), the sand paving groove II (3-5-2-2) is fixedly connected to the left side of the sand paving roller II (3-5-4-2), the powder paving roller II (3-5-4-2) is fixedly connected to the left side of the sand paving groove III (3-5-2-3), the sand paving groove III (3-5-2-3) is fixedly connected to the left side of the infrared heating pipe III (3-5-3-3), the infrared heating pipe III (3-5-3-3) is fixedly connected to the left side of the full-width combined type printing spray head module II (3-5-1-2), the full-width combined type printing spray head module II (3-5-1-2) is fixedly connected to the left side of the infrared heating pipe IV (3-5-3-4), the infrared heating pipe IV (3-5-3-4) is fixedly connected to the left side of the sand paving groove IV (3-5-2-4), the sand paving groove IV (3-5-2-4) is fixedly connected to the left side of the powder paving roller III (3-5-4-3) and used for achieving reciprocating bidirectional sand paving, printing and integrated forming of two layers of sand molds, the distance between the current sand paving surface and the powder paving roller II (3-5-4-2) is h, and the distances between the powder paving roller I (3-5-4-1) and the powder paving roller III (3-5-4-3) and the current sand paving surface are 2h respectively.
2. The 3D printing and shaping device according to claim 1, wherein the sand-pretreating system (1) is located outside the sanding-printing integrated system (3) and is connected with the vacuum sanding and feeding system (2), and the sand-pretreating system (1) is used for providing the sand particles mixed with the curing agent; the vacuum sand feeding and supplying system (2) is fixedly connected to one end of the sand paving and printing integrated system (3), and the vacuum sand feeding and supplying system (2) is used for storing the molding sand particles mixed with the curing agent and uniformly filling the molding sand particles mixed with the curing agent into the sand paving and printing integrated system (3); the moving platform (4) is located in the middle of the bottom of the sand paving and printing integrated system (3), and the moving platform (4) can move horizontally as a forming platform for printing a sand mold.
3. The 3D print forming apparatus according to claim 1, wherein the molding sand pretreatment system (1) includes a raw sand storage tank (1-1), a vertical feeder (1-2), a fixing barrel (1-3), an electric butterfly valve (1-4), a curing agent storage barrel (1-6), a curing agent metering pump (1-5), a sand mixer (1-7), a molding sand storage tank (1-8); the vertical feeding machine (1-2) is fixedly connected with the raw sand storage warehouse (1-1) and the sizing barrel (1-3) and is used for feeding raw sand particles stored in the raw sand storage warehouse (1-1) into the sizing barrel (1-3); the electric butterfly valve (1-4) is arranged at an outlet below the fixed charging barrel (1-3) and used for opening and closing the outlet of the fixed charging barrel and controlling the quality of the raw sand entering the sand mixer (1-7); the curing agent metering pump (1-5) is fixedly connected with the curing agent storage barrel (1-6) and the sand mixer (1-7) and is used for quantitatively conveying the curing agent stored in the curing agent storage barrel (1-6) into the sand mixer (1-7); the molding sand storage box (1-8) is arranged at an outlet of the sand mixer (1-7) and used for storing molding sand particles mixed with a curing agent.
4. The 3D printing and forming device according to claim 1, wherein the vacuum sanding and feeding system (2) is fixedly connected with the sanding and printing integrated system (3) and is located at one end of the sanding and printing integrated system (3), and comprises a vacuum sanding machine (2-1), a vacuum feeding barrel (2-2), a sanding box (2-3), a sanding beam (2-4), a sanding gantry (2-5), a sanding beam Z-direction moving module (2-6-1, 2-6-2) and a sanding beam Z-direction moving motor (2-7-1, 2-7-2); wherein the vacuum sand feeder (2-1) is connected with the molding sand storage tank (1-8) and the vacuum feeding barrel (2-2) and is used for sucking the molding sand particles stored in the molding sand storage tank (1-8) into the vacuum feeding barrel (2-2); the sand feeding box (2-3) is arranged on the sand feeding beam (2-4) and connected with the vacuum feeding barrel (2-2) and used for storing the molding sand particles; the Z-direction moving modules (2-6-1 and 2-6-2) of the upper sand beam are arranged on the upper sand gantry (2-5) and are fixedly connected with the upper sand beam (2-4), so that the Z-direction movement can be realized; the sand feeding beam Z-direction moving motors (2-7-1 and 2-7-2) are arranged on the sand feeding gantry (2-5) and connected with the sand feeding beam Z-direction moving modules (2-6-1 and 2-6-2) for driving the sand feeding beam Z-direction moving modules (2-6-1 and 2-6-2) to move; the upper sand gantry (2-5) is fixedly connected with the sand paving and printing integrated system (3).
5. The 3D printing and forming device according to claim 1, wherein the sanding and printing integrated system (3) is located above the moving platform (4), and the sanding and printing integrated system (3) comprises an X-direction cross beam (3-1), X-direction moving modules (3-2-1, 3-2-2), X-direction moving motors (3-3-1, 3-3-2), a sanding and printing movable gantry (3-4), a sanding and printing integrated device (3-5), a sanding and printing Z-direction moving module (3-6-1, 3-6-2), and a sanding and printing Z-direction moving motor (3-7-1, 3-7-2); the X-direction moving motors (3-3-1 and 3-3-2) are installed on the sanding printing movable gantry (3-4), and the X-direction moving motors (3-3-1 and 3-3-2) are connected with X-direction moving modules (3-2-1 and 3-2-2) installed on the X-direction beam (3-1) and used for driving the sanding printing movable gantry (3-4) to move along the X-direction beam (3-1); the sanding printing Z-direction moving modules (3-6-1, 3-6-2) and the sanding printing Z-direction moving motors (3-7-1, 3-7-2) are all installed on the sanding printing moving gantry (3-4) and are connected with each other, and the sanding printing integrated device (3-5) is connected with the sanding printing Z-direction moving modules (3-6-1, 3-6-2) and is driven by the sanding printing Z-direction moving motors (3-7-1, 3-7-2) to realize Z-direction lifting movement.
6. The 3D printing and forming device according to claim 1, wherein the moving platform (4) is located in the middle of an X-direction cross beam (3-1) of the sanding and printing integrated system (3) and comprises a movable platform trolley (4-1) and an X-direction moving slide rail (4-2) for realizing reciprocating motion of the moving platform at a printing working position and a sand type cleaning working position.
7. 3D print forming apparatus according to claim 1, characterized in that the control system (5) is used to enable automatic operation of the 3D print forming apparatus.
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| CN113458327A (en) * | 2021-06-17 | 2021-10-01 | 郑州中兴三维科技有限公司 | Bidirectional sanding 3D sand mold printing device |
| CN113458328A (en) * | 2021-06-17 | 2021-10-01 | 郑州中兴三维科技有限公司 | Follow-up sand adding system for 3D sand mold printing |
| CN114289685B (en) * | 2022-01-12 | 2023-06-30 | 南京航空航天大学 | Multi-material composite sand mold forming method and device |
| CN114918371B (en) * | 2022-05-20 | 2023-04-25 | 南京航空航天大学 | High-flexibility multi-region sand paving method and device for multi-material sand mould printing |
| CN116493609B (en) * | 2023-03-10 | 2023-10-31 | 南京航空航天大学 | Combined sand mould additive manufacturing multi-material integrated sand paving device and method |
| CN116329483B (en) * | 2023-05-24 | 2023-08-15 | 冀凯河北机电科技有限公司 | Bidirectional paving equipment, sand distribution equipment and 3D printing system of 3D sand mould printer |
| CN117066447B (en) * | 2023-08-22 | 2024-06-04 | 山东科技大学 | Sand printer |
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