CN215697750U - Bidirectional sanding 3D sand mold printing device - Google Patents
Bidirectional sanding 3D sand mold printing device Download PDFInfo
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- CN215697750U CN215697750U CN202121348301.5U CN202121348301U CN215697750U CN 215697750 U CN215697750 U CN 215697750U CN 202121348301 U CN202121348301 U CN 202121348301U CN 215697750 U CN215697750 U CN 215697750U
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Abstract
The utility model relates to a bidirectional sanding 3D sand mold printing device, which comprises a support frame and a sanding mechanism arranged on the support frame, wherein the sanding mechanism comprises a first sand storage tank, a second sand storage tank and an ink jet box arranged between the first sand storage tank and the second sand storage tank, the first sand storage tank, the second sand storage tank and the ink jet box are of the same structure and are arranged on the support frame through a fixing frame, a sand outlet hole is formed in the bottom of the first sand storage tank, and a scraper arranged in parallel with the sand outlet hole is arranged on one side of the sand outlet hole; according to the printing device provided by the utility model, bidirectional sanding is realized by using a double-storage-tank structure, idle running is avoided, and the production efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of 3D printing, and particularly relates to a bidirectional sanding 3D sand mold printing device.
Background
With the development of rapid prototyping technology, rapid prototyping of sand cores is widely used in the manufacture of complex sand cores. Compared with the traditional mould manufacturing method, the rapid sand core (mould) forming technology can realize the rapid production from a CAD model to a sand core (mould) entity. For castings with complex space structures such as engine cylinder bodies, cylinder covers, impellers, blades, transmission boxes and the like, the design and processing of dies such as a die sample, a core box and the like are a multi-link complex process in the traditional casting process, the processing mode is limited by the complexity of the dies, and once the forming is not easy to change, the use and the design are not flexible enough; the three-dimensional ink-jet printing technology is a rapid forming technology which selectively sprays liquid drops on the surface of a powder bed by utilizing the movement of a spray head and solidifies and forms a selected area through the comprehensive action of a binder and sand mixed with a curing agent, the three-dimensional ink-jet printing technology adopts the principle of dispersion and accumulation forming, and when a driving voltage is applied, the print spray head controls the spray holes needing to be sprayed to jet ink through a sensor according to a graphic file; the printing nozzle directly sprays or extrudes the binder ink from the nozzle, the binder ink is deposited on the surface of the powder material in the powder bed to form a 2D pattern with a set pattern, then a layer of powder is laid, a layer of binder is sprayed, and the powder is stacked layer by layer to form a printing green body; and printing the green blank, and finally obtaining a molded part through corresponding post-treatment. By means of computer aided design in manufacturing, the raw sand is directly molded into the three-dimensional solid sand core without any tooling die, is not influenced by the complexity of a molded part, and has the outstanding advantages of high molding speed, capability of integrally molding larger parts, no thermal stress residue, low equipment cost and operation cost and the like.
In the existing three-dimensional ink-jet printing equipment, after a layer of molding sand is generally laid in a cavity by sand laying equipment in a sand laying process, the binder is sprayed on the surface of the laid layer of sand by the ink-jet equipment, then the sand laying equipment returns to the initial position to carry out secondary sand laying, the operation is carried out in sequence, the sand laying equipment and the ink-jet equipment need to run empty once, and the next operation can be carried out, so that the production efficiency is reduced.
Disclosure of Invention
The utility model aims to solve the problems in the background art, and provides a bidirectional sanding 3D sand mold printing device.
The purpose of the utility model is realized as follows:
the utility model provides a two-way sanding 3D sand mould printing device, includes the support frame and locates the sanding mechanism on the support frame, sanding mechanism includes two the same storage sand groove one of structure, stores up sand groove two and locates the inkjet case that stores up between the sand groove one, the storage sand groove two, store up sand groove one, store up sand groove two and spout the inkjet case and all locate on the support frame through the mount, the bottom that stores up sand groove one is equipped with the sand outlet, one side of sand outlet is equipped with the scraper with sand outlet parallel arrangement.
Preferably, the support frame is provided with a slide rail for the fixing frame to slide on the support frame along the sanding direction, and the fixing frame is provided with a driving motor for driving the slide plate to slide on the slide rail.
Preferably, sand supply boxes for adding sand into the sand paving mechanism are arranged on two sides of the top end of the support frame.
Preferably, store up the adjacent side of sand groove one and storing up sand groove two and all be equipped with the vibration subassembly that drives the vibration of sand groove and make sand material evenly fall down, the vibration subassembly including locate one side of sand groove one, along a plurality of vibration boards that store up a sand groove length direction setting, a plurality of vibration board cover locate on same vibrting spear, the one end of vibrting spear is connected with the vibrating motor who drives the vibrting spear vibration.
Preferably, the sand outlet is provided with a baffle for blocking the sand outlet, and the baffle is driven by the cylinder to be close to or far away from the sand outlet.
Preferably, both ends of the support frame are provided with limit switches for limiting the movement positions of the sand paving mechanisms, and the limit switches are mechanical limit switches.
Preferably, the support frame and the fixing frame are both made of aluminum profiles and spliced together through connecting angle codes, and the driving motor is a closed-loop motor.
Preferably, the sand supply box comprises a charging barrel vertically arranged at the upper end of the support frame, a piston disc which slides in a sealing manner with the inner side wall of the charging barrel is arranged in the charging barrel, an electric push-pull rod which extends downwards and penetrates through the bottom of the charging barrel in a sealing manner is arranged at the bottom of the piston disc, a material outlet joint is arranged at the top of the charging barrel and is communicated with a discharging hose in a sealing manner, and an outlet of the discharging hose is communicated with an inlet of the nozzle in a sealing manner.
Preferably, the sand paving mechanism moves in the X direction of the support frame, in the 3D molding sand printing production process, raw sand is sucked into the sand mixing tank for weighing, a curing agent is added into the sand mixing tank according to set parameters, the mixing range is 0.16% -0.26%, the resolution in the X direction is 0.06mm-0.10mm, the single sand paving thickness of the sand paving mechanism is 0.2mm-0.4mm, and the sand paving speed is 120mm/s-210 mm/s.
Preferably, the ink in the ink jet box is graphene ink, the graphene ink with high-viscosity rheological body characteristics is prepared, and ethylenediamine is added to adjust the viscosity of the rheological body, so that a continuous extrusion molding process without disturbance is realized.
Preferably, when the sample obtained by the printing apparatus of the present invention is subjected to a tensile strength test, the maximum force to which the sample is subjected when the sample is broken during stretching is FaThe cross-sectional area of the fracture site of the specimen is SaThen, the tensile strength of the test specimen is αa（MPa）=Fa/Sa。
Preferably, the bending strength α of the sampleb(MPa) satisfies: alpha is alphab=3LFa/2bd2L is the distance (mm) between two support points supporting the sample, b is the width (mm) of the sample, and d is the thickness (mm) of the sample.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the bidirectional sanding 3D sand mold printing device provided by the utility model, in the process that the sanding mechanism moves from the left end to the right end on the support frame, the first sand storage tank is paved with a layer of molding sand into the sand box through the sand outlet, the baffle at the bottom of the second sand storage tank is lifted up at the moment to plug the sand outlet of the second sand storage tank, the ink spraying box sprays the adhesive on the sanding molding sand, when the first sand storage tank moves to the set position, the baffle at the bottom of the first sand storage tank is driven by the air cylinder to plug the sand outlet at the bottom of the first sand storage tank, the baffle at the bottom of the second sand storage tank is far away from the sand outlet, the sand outlet is opened, the sanding mechanism moves from the left end of the support frame, the second sand storage tank begins to be paved with a second layer of molding sand, and the ink spraying box sprays the corresponding adhesive on the second layer of molding sand at the same time, so that the sanding mechanism can perform bidirectional sanding when reciprocating movement on the support frame, and avoid empty running.
2. According to the bidirectional sanding 3D sand mold printing device provided by the utility model, the sand box feeds the molding sand into the sand storage tank, and along with the sliding of the sand storage tank on the slide rail, the molding sand is paved on the sanding platform of the sand box through the sand outlet hole under the action of the vibrating motor and is pushed to be flat by the scraper, so that the automatic sanding is realized.
3. According to the bidirectional sanding 3D sand mold printing device provided by the utility model, under the action of continuous, stable and high torque provided by the electric push-pull rod, the movement resistance of fluid in the charging barrel can be overcome, the material is uniformly and stably extruded, the electric push rod can play a self-locking function when the charging barrel does not work or is used for reversing printing, and the pressure in the cavity of the charging barrel is kept.
Drawings
Fig. 1 is a schematic structural diagram of a bidirectional sanding 3D sand mold printing device according to the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a left side view of fig. 1.
FIG. 4 is a schematic view of a sanding mechanism of the present invention.
Fig. 5 is a rear view of fig. 4.
Fig. 6 is a front view of fig. 4.
In the figure: 1. a support frame; 2. a slide rail; 3. a sand paving mechanism; 4. a fixed mount; 5. a first sand storage tank; 6. a second sand storage tank; 7. an ink jet box; 8. a vibrating plate; 9. a vibrating rod; 10. a drive motor; 11. a baffle plate; 12. a sand outlet; 13. and (4) scraping the blade.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1
With reference to fig. 1-3, a two-way sanding 3D sand mould printing device, includes support frame 1 and the sanding mechanism 3 of locating on the support frame 1, sanding mechanism 3 locates on the support frame 1 through mount 4, the top both sides of support frame 1 all are equipped with the confession sand case 4 to adding the sand in sanding mechanism 3, be equipped with on the support frame 1 and supply mount 4 along the gliding slide rail 2 of sanding direction on support frame 1, be equipped with gliding driving motor 10 of drive slide on slide rail 2 on mount 4, driving motor 10 slides on slide rail 2 through the drive slide, drives sanding mechanism 3 on the mount 4 and removes along the X direction of support frame 1, accomplishes sanding mechanism 3's sanding work.
The two ends of the support frame 1 are provided with limit switches used for limiting the movement positions of the sand paving mechanisms 3, the limit switches are mechanical limit switches, and the control system controls the movement and stop of the sand paving mechanisms 3 according to the signal feedback of the mechanical limit switches.
With reference to fig. 4-6, the sand paving mechanism 3 includes two sand storage tanks 5, two sand storage tanks 6 with the same structure and an ink jet box 7 disposed between the sand storage tanks 5 and two sand storage tanks 6, taking the sand storage tank 5 as an example, a sand outlet 12 is disposed at the bottom of the sand storage tank 5, a baffle 11 for blocking the sand outlet 12 is further disposed at the sand outlet 12, the baffle 11 is driven by a cylinder to be close to or away from the sand outlet 12, and a scraper 13 disposed in parallel with the sand outlet 12 is disposed at one side of the sand outlet 12.
Store up sand groove one 5 and store up the adjacent side of sand groove two 6 and all be equipped with the vibration subassembly that drives and store up the vibration of sand groove and make the sand material evenly fall down, the vibration subassembly including locate one side of storing up sand groove one 5, along a plurality of vibration boards 8 that store up sand groove one 5 length direction and set up, a plurality of vibration boards 8 cover locate on same vibrting spear 9, the one end of vibrting spear 9 is connected with the vibrating motor who drives the vibrting spear 9 vibration.
The sand box is supplied with the molding sand to be sent into the sand storage tank, along with the sliding of the sand storage tank on the slide rail, the molding sand is paved on the sand paving platform of the sand box under the action of the vibrating motor through the sand outlet hole, and is pushed to be flat through the scraper, so that the automatic sand paving is realized.
The sand paving mechanism moves to the right end from the left end on the support frame, a layer of molding sand is paved in the sand storage tank I through the sand outlet hole, the baffle at the bottom of the sand storage tank II is lifted up to plug the sand outlet hole at the bottom of the sand storage tank II, the binder is sprayed on the sanding molding sand by the ink spraying box, when the sand storage tank I moves to a set position, the baffle at the bottom of the sand storage tank I is driven by the air cylinder to plug the sand outlet hole at the bottom of the sand storage tank I, the baffle at the bottom of the sand storage tank II is far away from the sand outlet hole, the sand outlet hole is opened, the sand paving mechanism moves from the right end of the support frame to the left end, the second layer of molding sand is paved by the sand storage tank II, meanwhile, the ink spraying box sprays the corresponding binder on the second layer of molding sand, and therefore, the sand paving mechanism can perform bidirectional sand paving when reciprocating on the support frame, and air leakage is avoided.
Example 2
On the basis of the embodiment 1, a screw is arranged in the sand storage tank, and the rotation of the screw provides driving force to enable the molding sand particles to be stably extruded out of the sand storage tank through the sand outlet hole.
The sand supply box comprises a vertical feed cylinder arranged at the upper end of the support frame, a piston disc which slides in a sealing manner with the inner side wall of the feed cylinder is arranged in the feed cylinder, the bottom of the piston disc is provided with an electric push-pull rod which extends downwards and penetrates through the bottom of the feed cylinder in a sealing manner, the top of the feed cylinder is provided with a material outlet joint, the material outlet joint is communicated with a discharge hose in a sealing manner, the outlet of the discharge hose is communicated with the inlet of the nozzle in a sealing manner, the electric push-pull rod provides continuous, stable and high torque effect, can overcome the motion resistance of fluid in the feed cylinder, evenly and stably extrudes the material, and the electric push rod can play a self-locking function when the material is out of work or reversed to print, so that the pressure in the cavity of the feed cylinder is kept.
Example 3
The sand paving mechanism moves in the X direction of the support frame, in the 3D molding sand printing production process, raw sand is sucked into the sand mixing tank for weighing, a curing agent is added into the sand mixing tank according to set parameters, the mixing range is 0.16% -0.26%, the resolution in the X direction is 0.06mm-0.10mm, the single sand paving thickness of the sand paving mechanism is 0.2mm-0.4mm, and the sand paving speed is 120mm/s-210 mm/s.
When the sample obtained by the printing device of the utility model is used for tensile strength test, the maximum force born by the sample when the sample is broken in the stretching process is set as FaThe cross-sectional area of the fracture site of the specimen is SaThen, the tensile strength of the test specimen is αa（MPa）=Fa/Sa。
Flexural Strength α of the test specimensb(MPa) satisfies: alpha is alphab=3LFa/2bd2L is the distance (mm) between two support points supporting the sample, b is the width (mm) of the sample, and d is the thickness (mm) of the sample.
The ink in the ink jet box adopts graphene ink, the graphene ink with high-viscosity rheological body characteristics is prepared, ethylenediamine is added to adjust the viscosity of the rheological body, a continuous extrusion molding process under no disturbance is realized, and controllable construction and accurate cutting of the three-dimensional graphene metamaterial with the negative Poisson's ratio effect are realized.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the utility model, and any modifications, equivalents and substitutions made within the scope of the present invention should be included.
Claims (6)
1. The utility model provides a two-way sanding 3D sand mould printing device which characterized in that: including support frame (1) and sanding mechanism (3) of locating on support frame (1), sanding mechanism (3) include two storage sand groove (5) that the structure is the same, store up sand groove two (6) and locate storage sand groove (5), store up ink jet box (7) between sand groove two (6), store up sand groove (5), store up sand groove two (6) and ink jet box (7) and all locate on support frame (1) through mount (4), the bottom of storing up sand groove (5) is equipped with sand outlet (12), one side of sand outlet (12) is equipped with scraper (13) with sand outlet (12) parallel arrangement.
2. The bidirectional sanding 3D sand mold printing device according to claim 1, characterized in that: the sand spreading machine is characterized in that a sliding rail (2) for enabling a fixing frame (4) to slide on the supporting frame (1) along the sand spreading direction is arranged on the supporting frame (1), and a driving motor (10) for driving a sliding plate to slide on the sliding rail (2) is arranged on the fixing frame (4).
3. The bidirectional sanding 3D sand mold printing device according to claim 1, characterized in that: and sand supply boxes for adding sand into the sand paving mechanism (3) are arranged on two sides of the top end of the support frame (1).
4. The bidirectional sanding 3D sand mold printing device according to claim 1, characterized in that: store up sand groove one (5) and the adjacent side of storing up sand groove two (6) and all be equipped with the vibration subassembly that drives the vibration of sand storage groove and make sand material evenly fall down, the vibration subassembly including locate one side of sand storage groove one (5), along a plurality of vibration boards (8) that sand storage groove one (5) length direction set up, a plurality of vibration boards (8) cover locate on same vibrting spear (9), the one end of vibrting spear (9) is connected with the vibrating motor who drives vibrting spear (9) vibration.
5. The bidirectional sanding 3D sand mold printing device according to claim 1, characterized in that: the sand outlet (12) is also provided with a baffle (11) for plugging the sand outlet (12), and the baffle (11) is driven by the cylinder to be close to or far away from the sand outlet (12).
6. The bidirectional sanding 3D sand mold printing device according to claim 1, characterized in that: the two ends of the support frame (1) are provided with limit switches used for limiting the movement positions of the sand paving mechanisms (3), and the limit switches are mechanical limit switches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121348301.5U CN215697750U (en) | 2021-06-17 | 2021-06-17 | Bidirectional sanding 3D sand mold printing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121348301.5U CN215697750U (en) | 2021-06-17 | 2021-06-17 | Bidirectional sanding 3D sand mold printing device |
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| CN215697750U true CN215697750U (en) | 2022-02-01 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114922431A (en) * | 2022-03-31 | 2022-08-19 | 中国矿业大学 | Desert sand wind-proof wall 3D prints shower nozzle device |
| CN116944419A (en) * | 2023-06-20 | 2023-10-27 | 安徽天平机械股份有限公司 | Sand casting sand spreading device and use method |
-
2021
- 2021-06-17 CN CN202121348301.5U patent/CN215697750U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114922431A (en) * | 2022-03-31 | 2022-08-19 | 中国矿业大学 | Desert sand wind-proof wall 3D prints shower nozzle device |
| CN114922431B (en) * | 2022-03-31 | 2023-02-24 | 中国矿业大学 | Desert sand windproof wall 3D prints shower nozzle device |
| CN116944419A (en) * | 2023-06-20 | 2023-10-27 | 安徽天平机械股份有限公司 | Sand casting sand spreading device and use method |
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