CN113145798B - Sand mould 3D printing forming device capable of achieving angle-variable moving printing - Google Patents
Sand mould 3D printing forming device capable of achieving angle-variable moving printing Download PDFInfo
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- CN113145798B CN113145798B CN202110301899.0A CN202110301899A CN113145798B CN 113145798 B CN113145798 B CN 113145798B CN 202110301899 A CN202110301899 A CN 202110301899A CN 113145798 B CN113145798 B CN 113145798B
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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
- B22C25/00—Foundry moulding plants
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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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- Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
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Abstract
The invention belongs to the field of additive manufacturing, and discloses a sand mold 3D printing forming device capable of achieving variable-angle mobile printing. The device comprises a frame main body, a forming sand box, a liftable working platform, a molding sand storage box, a vacuum sand feeding system, a movable sand laying system, a variable-angle movable printing system and a control system. The forming device can automatically adjust the liquid spraying direction of the printing spray head according to the moving speed of the printing spray head in the printing process of each layer of sand mold, and ensures that resin binder microdroplets enter the sand layer in the speed direction vertical to the surface of the sand layer, thereby eliminating the anisotropy problems of the X direction and the Y direction in the prior sand mold printing technology. The device can realize the high-quality 3D printing of casting sand mould and take shape, has very strong popularization and use value.
Description
Technical Field
The invention belongs to the field of additive manufacturing, and particularly relates to a sand type 3D printing and forming device capable of achieving variable-angle movable printing.
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 fast 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 sanding hopper, then a liftable working platform descends to a fixed height, the sanding hopper moves on the liftable working platform for sanding, after sanding is completed, a computer controls a printing nozzle to spray a binder on the surface of a sand layer according to the profile information of the current layer of a sand mold according to needs, when the sprayed resin binder meets the molding sand premixed with the curing agents, the sand is bonded and cured into the current layer of the sand mold, then the liftable working platform descends by a fixed layer thickness, sanding and printing procedures are repeated, so that the required sand mold is finally 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 printing nozzle of the current sand mold 3D printing and forming device sprays resin binder in the moving process, the printing nozzle is fixed on the moving device in the moving process, the spraying direction of the printing nozzle spraying the resin binder is consistent with the gravity direction, and when the nozzle sprays the binder in the moving process, the speed direction of the resin binder is the coupling of the horizontal movement direction and the gravity direction, so that the speed direction of printed resin droplets is not vertical to the surface of a sand layer when entering the sand layer. However, the sand mold manufactured by the sand mold 3D printing technology has obvious anisotropy problems in the X direction and the Y direction, the problem is related to the speed direction of penetration and diffusion of resin droplets in the sand layer, and the anisotropy problems of the manufactured sand mold in the X direction and the Y direction are more and more prominent with the increase of the moving speed of the printing nozzle.
Disclosure of Invention
The invention provides a sand mold 3D printing and forming device capable of realizing variable-angle mobile printing, aiming at the problem that the anisotropy of the X direction and the Y direction of a printing sand mold is caused by the fact that the ejection speed direction of resin microdroplets is not vertical to the surface of a sand layer in the existing sand mold 3D printing and forming device.
The utility model provides a sand mould 3D that variable angle moved and prints shaper, its characterized in that device includes: the molding sand box comprises a rack main body, a molding sand box, a liftable working platform, a molding sand storage box, a vacuum sand feeding system, a movable sand paving system, a variable-angle movable printing system and a control system. The main body of the frame is a main bearing structure of the forming device, so that the forming device is stable and reliable in the working process; the forming sand box is positioned in the middle of the frame main body and used for providing a space required by forming a printing sand mold in the forming process; the liftable working platform is arranged in the forming sand box and is used for supporting the molding sand; the molding sand storage box is positioned beside the frame main body, is connected with the vacuum sanding system and is used for storing molding sand mixed with a curing agent; the vacuum sand feeding system is positioned above the rack main body and used for providing molding sand required by printing; the movable sand paving system is positioned above the rack main body and used for paving molding sand mixed with a curing agent on the surface of the liftable working platform; the variable-angle mobile printing system is positioned above the rack main body, and can adjust the spraying angle of the printing nozzle according to the mobile printing speed, so as to spray the adhesive on the surface of the laid molding sand; the control system is connected with the liftable working platform, the vacuum sanding system, the movable sanding system and the variable-angle movable printing system.
Preferably, the variable angle mobile printing system comprises: the movable printing cross beam is positioned above the rack main body, so that the variable-angle movable printing system can horizontally move on the rack main body; the array spray heads of the combined array spray head are distributed in a delta shape or a straight shape and are used for spraying the adhesive; the angle adjusting frame is fixedly connected with the movable printing cross beam; the rotating shaft rotating around the X direction is fixedly connected with the angle adjusting frame and the combined array nozzle and is used for adjusting the rotating angle of the combined array nozzle around the X direction; and the swing shaft rotating around the Y direction is fixedly connected with the angle adjusting frame and the combined array spray head and is used for adjusting the rotating angle of the combined array spray head around the Y direction.
Preferably, the rotating shaft rotating around the X direction is one of a combination of an angle adjusting motor and a motor base, a combination of the angle adjusting motor and a connecting rod, and a combination of the angle adjusting motor and a gear, and is used for realizing angle adjustment of the combined array nozzle around the X direction by-10 degrees to 10 degrees in a printing plane.
Preferably, the swing shaft rotating around the Y direction is one of a combination of an angle adjustment motor and a motor base, a combination of the angle adjustment motor and a connecting rod, and a combination of the angle adjustment motor and a gear, and is used for realizing angle adjustment of the combined array nozzle around the Y direction by-10 degrees to 10 degrees in a printing plane.
The beneficial effects are that: the 3D printing and forming device for the sand mold with the variable-angle mobile printing, provided by the invention, adopts the variable-angle mobile printing system, and can finely adjust the angle of the printing direction of the spray head according to the moving printing speed of the spray head, so that the printing and forming of the high-performance sand mold are realized.
Drawings
FIG. 1 is a schematic structural diagram of a sand mold 3D printing and forming device with variable-angle mobile printing;
FIG. 2 is a schematic diagram of a variable angle mobile printing system;
in the figure: 1. a rack main body; 2. forming a sand box; 3. a liftable working platform; 4. a molding sand storage box; 5. a vacuum sanding system; 6. moving the sand paving system; 7. a variable angle mobile printing system; 8. a control system; 9. moving the printing cross beam; 10. a combined array spray head; 11. An angle adjusting frame; 12. an X-direction rotating shaft; 13. and a Y-direction swing shaft.
Detailed Description
The invention provides a 3D printing and forming device for a sand mold with variable-angle movable printing, which comprises a rack main body 1, a forming sand box 2, a lifting working platform 3, a sand storage box 4, a vacuum sand feeding system 5, a movable sand paving system 6, a variable-angle movable printing system 7 and a control system 8, as shown in figures 1 to 2. The machine frame main body 1 is a main bearing structure of the forming device, so that the forming device is stable and reliable in the working process; the forming sand box 2 is positioned in the middle of the frame main body 1 and used for providing a space required by forming a printing sand mould in the forming process; the liftable working platform 3 is arranged in the forming sand box 2 and is used for supporting the molding sand; the molding sand storage box 4 is positioned beside the frame body 1, is connected with the vacuum sand feeding system 5 and is used for storing molding sand mixed with a curing agent; the vacuum sand feeding system 5 is positioned above the frame main body 1 and used for providing molding sand required by printing; the movable sand paving system 6 is positioned above the rack main body 1 and used for paving molding sand mixed with a curing agent on the surface of the liftable working platform 3; the variable-angle mobile printing system 7 is positioned above the rack main body 1, can adjust the spraying angle of a printing nozzle according to the mobile printing speed and is used for spraying the adhesive on the surface of the laid molding sand; the control system 8 is connected with the liftable working platform 3, the vacuum sanding system 5, the movable sanding system 6 and the variable-angle movable printing system 7.
Specifically, the variable angle mobile printing system 7 includes: the movable printing cross beam 9 is positioned above the rack main body 1, so that the variable-angle movable printing system 7 can horizontally move on the rack main body 1; the combined array spray head 10 is in a delta-shaped or in-line layout, and is used for spraying the adhesive; the angle adjusting frame 11 is fixedly connected with the movable printing cross beam 9; the rotating shaft 12 rotates around the X direction, and the rotating shaft 12 rotates around the X direction is connected with the angle adjusting frame 11 and the swing shaft 13 rotates around the Y direction and is used for adjusting the rotating angle of the combined array spray head 10 around the X direction; and the swing shaft 13 rotates around the Y direction, and the swing shaft 13 rotates around the Y direction is connected with the rotating shaft 12 rotating around the X direction and the combined array spray head 10 and is used for adjusting the rotating angle of the combined array spray head 10 around the Y direction.
Specifically, the rotating shaft 11 rotating around the X direction is one of a combination of an angle adjustment motor and a motor base, a combination of an angle adjustment motor and a connecting rod, and a combination of an angle adjustment motor and a gear, and is used for realizing angle adjustment of the combined array nozzle around the X direction by-10 degrees to 10 degrees in the printing plane.
Specifically, the swing shaft 12 rotating around the Y direction is one of a combination of an angle adjustment motor and a motor base, a combination of an angle adjustment motor and a connecting rod, and a combination of an angle adjustment motor and a gear, and is used for realizing angle adjustment of the combined array nozzle around the Y direction by-10 degrees to 10 degrees in the printing plane.
The working principle is as follows:
when the device works, firstly, the molding sand mixed with the curing agent and stored in the molding sand storage box 4 is conveyed into the movable sand laying system 6 by the vacuum sand feeding system 5. The control system 8 controls the liftable working platform 3 to descend for fixing the layer thickness according to the process requirements, then the control system 8 controls the movable sand laying system 6 to move and lay sand on the liftable working platform 3 at a certain sand laying speed according to the process requirements, and then the control system 8 controls the variable-angle movable printing system 7 to spray resin binder on the surface of the laid sand layer at a certain movable printing speed according to the process requirements. Meanwhile, the rotating shaft 12 rotating around the X direction is driven by the angle adjusting motor to tilt at an angle, so that the nozzle plane of the combined array nozzle 10 tilts backwards at a certain angle relative to the horizontal plane in the process of driving the combined array nozzle 10 to move forwards for printing, and the angle is related to the moving and printing speed, so that the speed direction of the sprayed resin liquid drops is ensured to be vertical to the surface of a sand layer; the rotating shaft 13 rotating around the Y direction is driven by the angle adjusting motor to be inclined at an angle, so that the nozzle plane of the combined array nozzle 10 is driven to incline rightwards at a certain angle relative to the horizontal plane in the process of moving and printing leftwards, and the angle is related to the moving and printing speed, so that the speed direction of the sprayed resin liquid drops is ensured to be vertical to the surface of the sand layer. And then the control system 8 controls the liftable working platform 3 to descend again for fixing the layer thickness, and the movable sand laying system 6 lays the current sand layer again. The sanding and printing process is repeated, and finally the sand mold is manufactured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention.
Claims (3)
1. The utility model provides a sand mould 3D that variable angle removed printing prints forming device which characterized in that includes:
the main body of the machine frame is a main bearing structure of the forming device, so that the stability and reliability of the forming device in the working process are ensured;
the forming sand box is positioned in the middle of the frame main body and used for providing a space required by forming a printing sand mold in the forming process;
the lifting working platform is arranged in the forming sand box and used for supporting the molding sand;
the molding sand storage box is positioned beside the frame main body and used for storing molding sand required by printing;
the vacuum sand feeding system is positioned above the rack main body, is connected with the molding sand storage box and is used for providing molding sand required by printing;
the movable sand paving system is positioned above the rack main body and used for paving molding sand mixed with a curing agent on the surface of the liftable working platform;
the variable-angle mobile printing system is positioned above the rack main body, can adjust the spraying angle of the printing nozzle according to the mobile printing speed and is used for spraying the adhesive on the surface of the laid molding sand; the variable angle mobile printing system includes: the movable printing cross beam is positioned above the rack main body, so that the variable-angle movable printing system can horizontally move on the rack main body; the array spray heads of the combined array spray head are distributed in a delta shape or a straight shape and are used for spraying the adhesive; the angle adjusting frame is fixedly connected with the movable printing cross beam; the rotating shaft rotating around the X direction is fixedly connected with the angle adjusting frame and the combined array nozzle and is used for adjusting the rotating angle of the combined array nozzle around the X direction; the swing shaft rotates around the Y direction, is fixedly connected with the angle adjusting frame and the combined array spray head and is used for adjusting the rotation angle of the combined array spray head around the Y direction;
and the control system is connected with the liftable working platform, the vacuum sand feeding system, the mass weighing system, the curing agent quantitative supply system, the sand mulling system, the movable sand paving system and the variable-angle movable printing system.
2. A3D printing and forming device for a sand mold with variable-angle movable printing according to claim 1, wherein the rotating shaft rotating around the X direction is one of a combination of an angle adjusting motor and a motor base, a combination of the angle adjusting motor and a connecting rod, and a combination of the angle adjusting motor and a gear, and is used for realizing angle adjustment of the combined array nozzle around the X direction within a printing plane by-10 degrees to 10 degrees.
3. A3D printing and forming device for a sand mold with variable-angle mobile printing according to claim 1, wherein the swing shaft rotating around the Y direction is one of a combination of an angle adjusting motor and a motor base, a combination of the angle adjusting motor and a connecting rod, and a combination of the angle adjusting motor and a gear, and is used for realizing angle adjustment of the combined array nozzle around the Y direction within a printing plane by-10 degrees to 10 degrees.
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| CN202110301899.0A CN113145798B (en) | 2021-03-22 | 2021-03-22 | Sand mould 3D printing forming device capable of achieving angle-variable moving printing |
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| CN202110301899.0A CN113145798B (en) | 2021-03-22 | 2021-03-22 | Sand mould 3D printing forming device capable of achieving angle-variable moving printing |
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| CN113145798A CN113145798A (en) | 2021-07-23 |
| CN113145798B true CN113145798B (en) | 2023-02-10 |
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