Circulating feeding system of 3D sand mold printer

Abstract

The invention provides a circulating feeding system of a 3D sand mold printer, and relates to the technical field of 3D printing feeding, the circulating feeding system comprises a supporting frame, and a main sand box is fixedly erected on the top of the supporting frame; the bottom of the main sand box is of a hopper-shaped structure, and the bottom of the main sand box is connected with a butterfly valve; the top of the main sand box protrudes upwards and is connected with an exhaust fan; the bottom of the butterfly valve is connected with a heating bin, the heating bin is externally connected with a flow divider, and two ends of the flow divider are respectively provided with two groups of gate valves driven by an electric cylinder; the distributor is arranged, the quantitative adding function is provided, catalyst particles can be added into sand to be mixed and subjected to catalytic treatment, the propelling motor drives the spiral propeller A to stir the sand and propel the sand downwards, the distributor can be driven to rotate integrally through gear transmission while the spiral propeller A rotates, and additives are conveyed quantitatively through the discharging groove; the problem that a catalyst is inconvenient to quantitatively add in an existing feeding system is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing feeding technology, and in particular to a circulating feeding system of a 3D sand printer. Background Art

[0002] The principle of 3D sand printing is to slice the three-dimensional model into layers, and use the printer to stack these slices layer by layer into a three-dimensional entity. The unused sand needs to be recycled and can be used again after processing. The sand output from the sand storage location needs to be added with corresponding catalytic additives and then mixed before being input into the sand pool.

[0003] The feeding system currently used has the following disadvantages:

[0004] 1. Continuous input of additives requires additional drive settings, poor synergy, inconvenience in quickly mixing additives while transporting sand, and lacks the function of automatic quantitative addition;

[0005] 2. Lack of corresponding structure for adding synchronous constant speed drive;

[0006] 3. It is necessary to use suction to return the material, which makes it inconvenient to quickly recover the unconsumed sand. Summary of the invention

[0007] In view of this, the present invention aims at addressing the deficiencies in the above-mentioned prior art and provides a circulating feeding system for a 3D sand printer.

[0008] The present invention provides a circulating feeding system for a 3D sand printer, specifically comprising: a support frame, a main sand material box is fixedly arranged on the top of the support frame; the bottom of the main sand material box is a bucket-shaped structure, and a butterfly valve is connected to the bottom of the main sand material box; the top of the main sand material box protrudes upward and is connected to an exhaust fan; a heating chamber is connected to the bottom of the butterfly valve, a diverter is connected to the outside of the heating chamber, and two groups of gate valves driven by electric cylinders are respectively arranged at both ends of the diverter; a diverter chamber is fixedly arranged on one side of the support frame, and an output pipeline is arranged outside the diverter chamber; a mixing chamber is connected to the top of the diverter chamber, and a mixing chamber is connected to the mixing chamber. A metering device is fixedly arranged on the top of the combining bin; a sand pipe is arranged on one side of the diverter and connected to the top of the mixing bin; a screw propeller A is rotatably arranged inside the mixing bin, the middle of the top of the mixing bin protrudes upward, and a propulsion motor for driving the screw propeller A is installed; a through hole is arranged on the top of the mixing bin to connect to the inside of the metering device, and a main rod is slidably arranged at a position aligned with the through hole on the top of the metering device; a storage bin is connected to the top of the metering device; a sand storage pool, the bottom of one side of the sand storage pool extends outward, and an inclined sand pipe is arranged on the outside of the extension and connected to one side of the top of the main sand box.

[0009] Optionally, a transmission bin is fixedly provided at the bottom of the heating bin, a stirring blade is rotatably provided inside the heating bin, and a motor is provided in the transmission bin to drive the stirring blade; a heater is provided in the inner wall of the heating bin.

[0010] Optionally, a transmission frame is fixedly arranged on the top of the quantitative device, a transmission shaft is rotatably arranged in the middle of the transmission frame, and the transmission shaft is connected to the top of the screw propeller A by a bevel gear transmission; an intermittent gear is fixedly arranged outside the transmission shaft, and the intermittent gear is a semi-gear structure; a driven shaft A is rotatably arranged below the transmission frame, a transmission wheel is fixedly arranged at one end of the driven shaft A, and an eccentric rod is fixedly arranged outside the transmission wheel; a driven shaft B is rotatably arranged above the transmission frame; gears are arranged outside the driven shaft A and the driven shaft B to mesh with the intermittent gears.

[0011] Optionally, a distributor is rotatably arranged inside the quantitative device, a discharge groove is arranged around the distributor, and the inner bottom corners of the discharge groove are arc-shaped structures; a driven gear plate is fixedly arranged on the top of the distributor; a bevel gear is arranged at one end of the driven shaft B to mesh with the driven gear plate.

[0012] Optionally, a guide frame is fixedly provided at the top end of the main rod; the eccentric rod slides in the guide frame to form a reciprocating mechanism; and a spring is sleeved on the upper part of the outside of the main rod.

[0013] Optionally, a push block is fixedly provided at the bottom end of the main rod, two groups of adapting plates are slidably provided on both sides of the push block, four groups of spring rods are provided between the adapting plates and the push block; the push block and the adapting plates fit and slide in the discharge groove.

[0014] Optionally, a pull rod is slidably provided at the top of the storage bin, a counterweight handle is fixedly provided at the top of the pull rod, a push piston is fixedly provided at the bottom end of the pull rod, and the push piston slides in the storage bin.

[0015] Optionally, the lower sides of the inner part of the sand storage pool are slope structures, a printing frame is fixedly arranged in the middle of the sand storage pool, the printing frame is a grid structure, and the cross-section of the printing frame is a triangular structure; a push-back motor is fixedly arranged outside the sand storage pool; a screw propeller B is rotatably arranged at the middle bottom of the sand storage pool, and the screw propeller B is transmission-connected to the push-back motor.

[0016] The beneficial effects are as follows:

[0017] 1. A distributor is provided to provide a quantitative adding function, which can add catalyst particles to the sand material for mixing and catalytic treatment. The propulsion motor drives the screw propeller A to stir the sand material and propel it downward. While the screw propeller A rotates, the distributor can be driven to rotate as a whole through the gear transmission, and the additive is quantitatively transported through the discharge trough. When the discharge trough is aligned with the through hole on the top of the mixing bin, the additive can naturally fall into the mixing bin.

[0018] 2. Intermittent gears are set up, and the constant speed feeding function is achieved. After the discharge trough feeds one station each time, the main rod descends, and the main rod is used to push the push block and the adaptation piece to squeeze the additive downward into the mixing bin, thereby achieving continuous addition. The push block and the adaptation piece are slidably connected, and the adaptation piece will automatically adapt to the reduction of the discharge trough to ensure the advancement of the additive and stable addition.

[0019] 3. The spiral propeller B and the exhaust fan are set to provide a dual recovery function. When recovering the sand in the sand storage pool, start the push-back motor to drive the spiral propeller B to rotate, which can generate thrust. The exhaust fan is used to generate suction, which can provide auxiliary conveying effect and can recover the sand into the main sand box, making it convenient and quick to recover the sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a three-dimensional cross-sectional structure according to an embodiment of the present invention is shown;

[0021] Figure 2 The embodiment according to the present invention is shown Figure 1 A schematic diagram of the structure from another angle;

[0022] Figure 3 The embodiment according to the present invention is shown Figure 1 Schematic diagram of the side elevation structure;

[0023] Figure 4 A schematic diagram of a three-dimensional cross-sectional structure of a heating bin according to an embodiment of the present invention is shown;

[0024] Figure 5 A schematic diagram of a three-dimensional cross-sectional structure of a mixing bin according to an embodiment of the present invention is shown;

[0025] Figure 6 A schematic diagram of the assembly structure of a quantitative device according to an embodiment of the present invention is shown;

[0026] Figure 7 The embodiment according to the present invention is shown Figure 6 A schematic diagram of the structure from another angle;

[0027] Figure 8 A schematic diagram of the three-dimensional structure of a material distributor according to an embodiment of the present invention is shown;

[0028] Fig. 9 A schematic diagram of the three-dimensional structure of a main guide rod according to an embodiment of the present invention is shown;

[0029] Fig.10 A schematic diagram of the system flow structure according to an embodiment of the present invention is shown.

[0030] Reference numerals list

[0031] 1. Support frame; 2. Main sand material box; 201. Butterfly valve; 3. Exhaust fan; 4. Heating chamber; 401. Transmission chamber; 402. Stirring blade; 5. Diverter; 6. Diverter chamber; 7. Mixing chamber; 701. Screw propeller A; 702. Propulsion motor; 8. Dosing device; 801. Transmission frame; 802. Transmission shaft; 803. Intermittent gear; 804. Driven shaft A; 805. Transmission wheel; 806. Eccentric rod; 807, driven shaft B; 9, distributor; 901, discharge chute; 902, driven gear disc; 10, main rod; 1001, guide frame; 1002, push block; 1003, adaptation plate; 1004, spring rod; 11, storage bin; 1101, pull rod; 1102, push piston; 12, sand storage pool; 1201, printing frame; 1202, push back motor; 1203, screw propeller B. DETAILED DESCRIPTION

[0032] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention.

[0033] Embodiment 1:

[0034] Please refer to Figures 1 to 10 As shown:

[0035] The present invention proposes a circulating feeding system for a 3D sand printer, comprising: a support frame 1, a main sand material box 2 is fixedly mounted on the top of the support frame 1; the bottom of the main sand material box 2 is a bucket-shaped structure, and a butterfly valve 201 is connected to the bottom of the main sand material box 2; the top of the main sand material box 2 protrudes upward and is connected to an exhaust fan 3; a heating chamber 4 is connected to the bottom of the butterfly valve 201, a diverter 5 is connected to the outside of the heating chamber 4, and two groups of gate valves driven by electric cylinders are respectively arranged at both ends of the diverter 5; a diverter chamber 6 is fixedly arranged on one side of the support frame 1, and an output pipeline is arranged outside the diverter chamber 6; a mixing chamber 7 is connected to the top of the diverter chamber 6, and the mixing chamber 7 is connected to the mixing chamber 7. A metering device 8 is fixedly arranged on the top; a sand pipe is arranged on one side of the diverter 5 and is connected to the top of the mixing bin 7; a screw propeller A701 is rotatably arranged inside the mixing bin 7, the middle of the top of the mixing bin 7 protrudes upward, and a propulsion motor 702 for driving the screw propeller A701 is installed; a through hole is arranged on the top of the mixing bin 7 to connect to the inside of the metering device 8, and a main rod 10 is slidably arranged at a position aligned with the through hole on the top of the metering device 8; a storage bin 11 is connected to the top of the metering device 8; a sand storage pool 12, the bottom of one side of the sand storage pool 12 extends outward, and an inclined sand pipe is arranged on the outside of the extension to connect to one side of the top of the main sand box 2.

[0036] A transmission chamber 401 is fixedly arranged at the bottom of the heating chamber 4 , a stirring blade 402 is rotatably arranged inside the heating chamber 4 , and a motor is arranged inside the transmission chamber 401 to drive the stirring blade 402 ; a heater is arranged in the inner wall of the heating chamber 4 .

[0037] Among them, a transmission frame 801 is fixedly arranged on the top of the metering device 8, and a transmission shaft 802 is rotatably arranged in the middle of the transmission frame 801, and the transmission shaft 802 is connected to the top of the screw propeller A701 by a bevel gear transmission; an intermittent gear 803 is fixedly arranged outside the transmission shaft 802, and the intermittent gear 803 is a semi-gear structure; a driven shaft A804 is rotatably arranged below the transmission frame 801, and a transmission wheel 805 is fixedly arranged at one end of the driven shaft A804, and an eccentric rod 806 is fixedly arranged outside the transmission wheel 805; a driven shaft B807 is rotatably arranged above the transmission frame 801; gears are arranged outside the driven shaft A804 and the driven shaft B807 to mesh with the intermittent gear 803.

[0038] Among them, a distributor 9 is rotatably arranged inside the quantitative device 8, a discharge groove 901 is arranged around the distributor 9, and the inner bottom corner of the discharge groove 901 is an arc surface structure; a driven gear disc 902 is fixedly arranged on the top of the distributor 9; a bevel gear is arranged at one end of the driven shaft B807 to mesh with the driven gear disc 902.

[0039] A guide frame 1001 is fixedly provided at the top of the main rod 10; the eccentric rod 806 slides in the guide frame 1001 to form a reciprocating mechanism; and a spring is sleeved on the outer upper part of the main rod 10.

[0040] Among them, a push block 1002 is fixedly set at the bottom end of the main rod 10, two groups of adaptation plates 1003 are slidably set on both sides of the push block 1002, and four groups of spring rods 1004 are set between the adaptation plates 1003 and the push block 1002; the push block 1002 and the adaptation plates 1003 slide in the discharge groove 901 in a matching manner.

[0041] Among them, a pull rod 1101 is slidably provided on the top of the storage bin 11, a counterweight handle is fixedly provided on the top of the pull rod 1101, and a push piston 1102 is fixedly provided on the bottom end of the pull rod 1101, and the push piston 1102 slides in the storage bin 11.

[0042] Among them, the lower parts of the two sides inside the sand storage pool 12 are slope structures, and a printing frame 1201 is fixedly arranged in the middle of the sand storage pool 12. The printing frame 1201 is a grid structure, and the cross-section of the printing frame 1201 is a triangular structure; a push-back motor 1202 is fixedly arranged outside the sand storage pool 12; a screw propeller B1203 is rotatably arranged at the middle bottom of the sand storage pool 12, and the screw propeller B1203 is transmission-connected to the push-back motor 1202.

[0043] like Figure 1-10As shown, the pipeline outside the diversion bin 6 is connected to the input module of the printer, the sand material can naturally fall when the butterfly valve 201 is opened, the stirring blade 402 is driven by the motor, and the sand material is heated by the heater at the same time, so that the sand material can be preheated and evenly processed; the additive is pre-installed in the storage bin 11;

[0044] During the conveying, the sand material will enter the diverter 5, and will be input into the mixing chamber 7 from one side of the diverter 5. The propulsion motor 702 will drive the screw propeller A701 to stir the sand material and propel it downward. When the screw propeller A701 rotates, the bevel gear will drive the transmission shaft 802 to rotate, and the transmission shaft 802 will drive the intermittent gear 803 to rotate. The intermittent gear 803 will intermittently drive the driven shaft A804 and the driven shaft B807 to rotate respectively.

[0045] When the driven shaft B807 rotates, the driven toothed disc 902 rotates in coordination with the bevel gear, and then the distributor 9 rotates as a whole, and the additive is quantitatively delivered through the discharge slot 901; when the driven shaft A804 rotates, the transmission wheel 805 and the eccentric rod 806 rotate, and the eccentric rod 806 slides in the guide frame 1001 to drive the main rod 10 to move up and down, and the main rod 10 is used to push the push block 1002 and the adaptable sheet 1003, so as to squeeze the additive downward into the mixing bin 7;

[0046] As the lower part of the discharge groove 901 gradually shrinks, the push block 1002 and the adaptable sheet 1003 are slidably connected, and the adaptable sheet 1003 automatically adapts to the shrinkage of the discharge groove 901 to ensure the advancement of the additive.

[0047] Embodiment 2:

[0048] On the basis of Example 1, the printing frame 1201 can provide supporting force. When the sand in the sand storage pool 12 is recovered, the push-back motor 1202 is started to drive the screw propeller B1203 to rotate, thereby generating thrust.

[0049] Embodiment 3:

[0050] On the basis of Example 2, the suction force generated by the exhaust fan 3 can provide an auxiliary conveying effect, and the sand can be recovered into the main sand box 2; a sand filter or cotton layer is arranged at the suction port of the exhaust fan 3 to prevent the sand from being sucked out;

[0051] When returning the material, closing the butterfly valve 201 can ensure that the main sand box 2 becomes negative pressure and continuously absorbs sand.

[0052] Specific usage and function of this embodiment: In the present invention, the pipeline outside the diversion bin 6 is connected to the input module of the printer, the sand material can naturally fall when the butterfly valve 201 is opened, the stirring blade 402 is driven by the motor, and the sand material is heated by the heater at the same time, so that the sand material can be preheated and evenly processed; the additive is pre-installed in the storage bin 11;

[0053] During this period, the sand material will enter the diverter 5, and will be input into the mixing chamber 7 from one side of the diverter 5. The propulsion motor 702 will drive the screw propeller A701 to stir the sand material and propel it downward. When the screw propeller A701 rotates, the bevel gear will drive the transmission shaft 802 to rotate, and the transmission shaft 802 will drive the intermittent gear 803 to rotate. The intermittent gear 803 will intermittently drive the driven shaft A804 and the driven shaft B807 to rotate respectively.

[0054] When the driven shaft B807 rotates, it cooperates with the bevel gear to drive the driven gear plate 902 to rotate, and then the distributor 9 rotates as a whole, and the additive is quantitatively transported through the discharge groove 901;

[0055] When the driven shaft A804 rotates, it drives the transmission wheel 805 and the eccentric rod 806 to rotate. The eccentric rod 806 slides in the guide frame 1001 and drives the main rod 10 to move up and down. The main rod 10 pushes the push block 1002 and the adaptable sheet 1003 to squeeze the additive downward into the mixing chamber 7, thereby realizing continuous addition.

[0056] The lower part of the discharge slot 901 gradually shrinks, so the push block 1002 and the adaptable sheet 1003 are slidably connected, and the adaptable sheet 1003 automatically adapts to the shrinkage of the discharge slot 901 to ensure the advancement of the additive;

[0057] The printing frame 1201 can provide supporting force. When the sand in the sand storage pool 12 is recovered, the push-back motor 1202 is started to drive the screw propeller B1203 to rotate, thereby generating thrust. The exhaust fan 3 is used to generate suction force, which can provide auxiliary conveying effect and recover the sand into the main sand material box 2.

[0058] The other side of the diverter 5 is used for discharging materials, so as to facilitate the processing of the recovered sand materials.

Claims

1. A circulating feeding system for a 3D sand printer, comprising: A support frame (1), wherein a main sand material box (2) is fixedly mounted on the top of the support frame (1); the bottom of the main sand material box (2) is a bucket-shaped structure, and a butterfly valve (201) is connected to the bottom of the main sand material box (2); the top of the main sand material box (2) protrudes upward and is connected to an exhaust fan (3); it is characterized in that a heating chamber (4) is connected to the bottom of the butterfly valve (201), a diverter (5) is connected to the outside of the heating chamber (4), and two groups of gate valves driven by electric cylinders are respectively arranged at both ends of the diverter (5); a diverter chamber (6) is fixedly mounted on one side of the support frame (1), and an output pipeline is arranged outside the diverter chamber (6); a mixing chamber (7) is connected to the top of the diverter chamber (6), and a fixed valve is fixedly arranged on the top of the mixing chamber (7). a measuring device (8); a sand pipe is arranged on one side of the diverter (5) and connected to the top of the mixing bin (7); a screw propeller A (701) is rotatably arranged inside the mixing bin (7); the middle of the top of the mixing bin (7) protrudes upward and is equipped with a propulsion motor (702) for driving the screw propeller A (701); a through hole is arranged on the top of the mixing bin (7) and connected to the inside of the measuring device (8); a main rod (10) is slidably arranged at a position aligned with the through hole on the top of the measuring device (8); a material storage bin (11) is arranged on the top of the measuring device (8); a sand storage pool (12), the bottom of one side of the sand storage pool (12) extends outward, and an inclined sand pipe is arranged on the outside of the extension and connected to one side of the top of the main sand material box (2).

2. A circulating feeding system for a 3D sand printer as claimed in claim 1, characterized in that: A transmission chamber (401) is fixedly arranged at the bottom of the heating chamber (4), a stirring blade (402) is rotatably arranged inside the heating chamber (4), and a motor is arranged inside the transmission chamber (401) to drive the stirring blade (402); a heater is arranged in the inner wall of the heating chamber (4).

3. A circulating feeding system for a 3D sand printer as claimed in claim 1, characterized in that: A transmission frame (801) is fixedly arranged on the top of the quantitative device (8), a transmission shaft (802) is rotatably arranged in the middle of the transmission frame (801), and the transmission shaft (802) is connected to the top of the screw propeller A (701) by a bevel gear transmission; an intermittent gear (803) is fixedly arranged outside the transmission shaft (802), and the intermittent gear (803) is a semi-gear structure; a driven shaft A (804) is rotatably arranged below the transmission frame (801), a transmission wheel (805) is fixedly arranged at one end of the driven shaft A (804), and an eccentric rod (806) is fixedly arranged outside the transmission wheel (805); a driven shaft B (807) is rotatably arranged above the transmission frame (801); gears are arranged outside the driven shaft A (804) and the driven shaft B (807) to mesh with the intermittent gear (803).

4. A circulating feeding system for a 3D sand printer as claimed in claim 3, characterized in that: A distributor (9) is rotatably arranged inside the quantitative device (8), a discharge groove (901) is arranged around the distributor (9), and the inner bottom corner of the discharge groove (901) is a curved surface structure; a driven gear disc (902) is fixedly arranged on the top of the distributor (9); a bevel gear is arranged at one end of the driven shaft B (807) and meshes with the driven gear disc (902).

5. A circulating feeding system for a 3D sand printer as claimed in claim 4, characterized in that: A guide frame (1001) is fixedly arranged at the top end of the main rod (10); the eccentric rod (806) slides in the guide frame (1001) to form a reciprocating mechanism; and a spring is sleeved on the upper part of the outside of the main rod (10).

6. A circulating feeding system for a 3D sand printer as claimed in claim 5, characterized in that: A push block (1002) is fixedly arranged at the bottom end of the main rod (10), two groups of adaptable plates (1003) are slidably arranged on both sides of the push block (1002), and four groups of spring rods (1004) are arranged between the adaptable plates (1003) and the push block (1002); the push block (1002) and the adaptable plates (1003) are matched and slid in the discharge groove (901).

7. A circulating feeding system for a 3D sand printer as claimed in claim 1, characterized in that: A pull rod (1101) is slidably provided at the top of the material storage bin (11), a counterweight handle is fixedly provided at the top of the pull rod (1101), and a push piston (1102) is fixedly provided at the bottom of the pull rod (1101), and the push piston (1102) slides in the material storage bin (11).

8. A circulating feeding system for a 3D sand printer as claimed in claim 1, characterized in that: The lower sides of the sand storage pool (12) are provided with a slope structure, and a printing frame (1201) is fixedly arranged in the middle of the sand storage pool (12), and the printing frame (1201) is a grid-like structure, and the cross section of the printing frame (1201) is a triangular structure; a push-back motor (1202) is fixedly arranged outside the sand storage pool (12); and a screw propeller B (1203) is rotatably arranged at the middle bottom of the sand storage pool (12), and the screw propeller B (1203) is transmission-connected to the push-back motor (1202).

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