Bulk material automatic orderer

Abstract

The application relates to the technical field of inductance product manufacturing, and discloses a bulk material automatic sorting machine, which comprises a rack, a moving frame, a vibrating feeding disc, a material conveying track, a turnover bin, a material table and a material groove laid on the material table, the material grooves are sorted by columns, the number of the material grooves is an integer multiple of the number of the material conveying tracks, a limiting mechanism is used for simultaneously pressing the granular materials in the same row of the material grooves in multiple columns, a material receiving seat is slidably installed on the rack and is provided with a plurality of material receiving cavities, the material receiving cavities and the material grooves are in one-to-one correspondence, the material receiving cavities only receive single granular materials, the material receiving seat is provided with a suction accessory for sucking the granular materials, a feeding unit comprises a moving seat and a guide rail, the moving seat slides on the guide rail, a granular material taking and placing unit is used for sucking the granular materials on the material receiving seat and placing the granular materials on a jig, and a suction head is arranged. The application can one-to-one receive the last row of granular materials, directly suck and fix the granular materials through the suction accessory, and eliminate displacement tolerance.

Description

Technical Field

[0001] This application relates to the technical field of inductor manufacturing, and in particular to an automatic sorting machine for bulk materials. Background Technology

[0002] In the traditional inductor industry, the specific products involved, such as chip capacitors and surface mount inductors, are arranged in a matrix. For example, electronic components (commonly known as granular materials) need to be arranged and transported to external printing equipment to complete the printing process.

[0003] Generally, these granular materials are in bulk and need to be arranged. The arrangement of the granular materials is as described in patent application number CN202122456694.8. The number of vibrating discs on the feeding mechanism is increased to four, and the traditional feeding plate is set to four feeding slots. The number of feeding slots is increased to a multiple of the number of feeding slots. With the use of a position adjustment mechanism, the working efficiency of the pad printing machine can be met, and the vibrating disc feeding does not need to be turned up to the maximum, thereby improving the feeding efficiency of the feeding mechanism and thus improving the working efficiency of the pad printing machine.

[0004] When multiple feeding troughs contain granules in the same row, they are simultaneously picked up by the PPU pick-and-place unit and placed onto the fixture. If the position of the granules in one of the feeding troughs shifts, causing the entire row of granules to be out of line, there is a possibility of missing granules. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides an automatic bulk material sorting machine.

[0006] This application provides an automatic bulk material sorting machine, which adopts the following technical solution:

[0007] Automatic bulk material sorting machine, including:

[0008] frame,

[0009] A movable frame is slidably mounted on the frame.

[0010] Multiple vibrating feeding trays are fixedly installed on the movable frame.

[0011] The material conveying track is fixedly installed on the movable frame. One end of the material conveying track is connected to the vibrating feeding plate, and the other end is connected to the material trough of the turnover warehouse. The material conveying track and the vibrating feeding plate correspond one-to-one.

[0012] A turnover bin, fixedly installed on the frame, includes a material platform and material troughs laid on the material platform. The material troughs are arranged in columns, and the number of material troughs is an integer multiple of the number of conveying tracks.

[0013] The first driving component drives the moving frame to move at equal distances, so that the material conveying track and the different material troughs are connected;

[0014] A limiting mechanism, installed on the frame and located above the turnover bin, includes a rotatably mounted limiting rod for simultaneously pressing against the same row of granular material in multiple rows of troughs;

[0015] The receiving seat is slidably mounted on the frame and has multiple receiving cavities. Each receiving cavity corresponds to a material trough. Each receiving cavity receives only a single particle. The receiving seat is equipped with an adsorption element for sucking up the particle. The receiving seat receives the last row of particles from the turnover bin. The limiting rod is used to press down the second-to-last row of particles.

[0016] The second driving component is used to drive the receiving seat closer to or away from the turnover bin.

[0017] The feeding unit includes a movable seat and a guide rail, the movable seat slides on the guide rail, and a fixture for receiving granular material is placed on the movable seat;

[0018] The granular material handling unit is used to pick up the granular material from the receiving seat and place the granular material on the fixture;

[0019] The third driving component is used to drive the movable seat to move at equal distances along the guide rail, so that the granular material is arranged and filled into the fixture.

[0020] The suction head is used to draw the granular material from the moving seat into the printing machine.

[0021] By adopting the above technical solution, the vibrating feeding tray vibrates, sorts the bulk materials, and sends them into the turnover bin trough via the conveying track. The granular materials are arranged in columns in the trough. The first driving component drives the moving frame to move at equal distances, and the conveying track switches to the next trough column to achieve continuous feeding. The limiting rod presses down, simultaneously pressing against the same row (second to last row) of granular materials in all troughs. The receiving seat receives the last row of granular materials, the adsorption component fixes a single granular material, and the granular material picking and placing unit picks up the granular materials on the receiving seat. The picking and placing unit places the granular materials onto the fixture, and the moving seat (driven by the third driving component) carries the fixture. It cooperates with the granular material picking and placing unit to fill the granular materials, so that the columns of the fixture that have not placed granular materials are waiting to be filled. The granular materials are placed in rows on the fixture. Finally, the moving seat moves along the guide rail to below the suction head, so that the suction head sends all the granular materials into the printing machine.

[0022] Optionally, the frame is provided with an air blowing pipe above the material platform, and the air blowing pipe corresponds one-to-one with the material trough.

[0023] By adopting the above technical solution, the air blowing pipe blows air directionally into the material trough, which promotes the orderly movement of the granular material.

[0024] Optionally, at least two feeding units are provided.

[0025] Optionally, the movable seat includes a first movable part and a second movable part. The first movable part moves along the length direction of the guide rail. The two feeding units share a suction head. The first movable part is provided with a fourth driving member that drives the second movable part to translate. The two second movable parts alternately translate to below the suction head.

[0026] By adopting the above technical solution, the suction head operates in a fixed position, reducing the travel distance; the two second moving parts are positioned alternately, shortening the waiting time.

[0027] Optionally, a sensor is provided on the movable frame, the sensor is arranged along the extension direction of the conveying track, and the sensor is located above the turnover bin.

[0028] By adopting the above technical solution, the problem of blind spot detection of granular material position is solved, the filling status of the material trough is monitored in real time, and empty material or overload is prevented.

[0029] Optionally, the adsorption element includes a vacuum channel, the channel opening of which is connected to the receiving chamber, and the vacuum channel is connected to a vacuum generator.

[0030] By adopting the above technical solution, granular materials can be extracted using negative pressure, applicable to both magnetic and non-magnetic granular materials, thus expanding the application scenarios of the equipment.

[0031] Optionally, the adsorption element includes a magnetic insert rod, which is correspondingly arranged with the material trough. When the receiving seat is close to the turnover bin, the bottom wall of the material trough is provided with a slot for the insert rod to be inserted. The last row of granules on the turnover bin is located above the insert rod, and the granules are adsorbed onto the insert rod.

[0032] By adopting the above technical solution, the second driving component drives the receiving seat to move closer to or away from the turnover bin; the adsorption component is a magnetic rod; when the receiving seat moves closer, the rod is inserted into the material slot to adsorb the granular material, the receiving seat moves away from the turnover bin, and the granular material is carried away for the pick-up and drop-off unit to pick up, which solves the problem of granular material falling off or shifting during the transfer process, and ensures fixation through magnetic adsorption, simplifies the receiving process, and reduces mechanical complexity.

[0033] Optionally, a limiting block is slidably installed in the material trough. The material trough has a limiting groove for accommodating the limiting block. The limiting groove is connected to the slot. A return spring is installed in the limiting groove to drive the limiting block to extend out of the limiting groove. One end of the return spring is fixedly connected to the limiting block, and the other end of the return spring is fixedly installed in the limiting groove. The last row of granular material in the turnover bin abuts against the limiting block. The part of the limiting block extending out of the limiting groove also extends out of the slot and has a guide surface. When the granular material abuts against the limiting block, the insert rod first contacts the guide surface when inserted into the slot, so that the limiting block is pushed back into the limiting groove by the insert rod.

[0034] By adopting the above technical solution, when the limiting block extends, it blocks the granular material and prevents the granular material from leaving the trough; when the insert rod is inserted, the guide surface guides the limiting block to retract, realizing mechanical linkage.

[0035] Optionally, a movable rod is provided in the limiting groove, the return spring is sleeved on the movable rod, the limiting block slides up and down on the movable rod, and the movable rod is hinged in the limiting groove. When the part of the limiting block extending out of the slot leaves a gap with the granular material, when the insert rod is inserted along the slot, the limiting block abuts against the side wall of the limiting groove along with the rotation of the movable rod, and the limiting block blocks the slot. The receiving seat is equipped with a displacement sensor, and the displacement sensor is electrically connected to an alarm. When the insert rod abuts against the limiting block in the blocked slot state, the displacement sensor signal is transmitted to the alarm, and the alarm sounds.

[0036] By adopting the above technical solution, the receiving seat drives all the insert rods to move synchronously to the slot. If the granules are in place: the limit block is pressed by the granules, the limit block squeezes the reset spring into the limit groove, the limit block moves down along the movable rod, the insert rod is smoothly inserted and adsorbs the granules, and the displacement sensor records the normal stroke.

[0037] If granular material is missing: the limit block blocks the slot, the insertion rod is blocked by the limit block, resulting in insufficient movement of the receiving seat, abnormal movement of the receiving seat, and the sensor signal triggers the alarm. When the displacement signal is abnormal, the alarm will sound and light, prompting the operator to check for missing material or mechanical jamming.

[0038] In summary, this application includes at least one of the following beneficial effects:

[0039] 1. The receiving chamber receives the last row of granules one-to-one, and the granules are directly adsorbed and fixed by the adsorption component, eliminating displacement tolerance;

[0040] 2. All granular material adsorption actions in the troughs are synchronized, and the movement of the receiving seat is monitored: if the insertion rod is blocked by the limit block (granular material is missing), the alarm is triggered immediately. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the distribution of the vibrating feeder in Embodiment 1 of this application;

[0042] Figure 2 This is a schematic diagram of the overall structure of the turnover warehouse as shown in Embodiment 1 of this application;

[0043] Figure 3 yes Figure 2 Enlarged view of point B;

[0044] Figure 4 yes Figure 4 Enlarged view of point A;

[0045] Figure 5 This is a schematic diagram showing the relative positions of the receiving seat and the turnover bin in Embodiment 1 of this application;

[0046] Figure 6 yes Figure 5 Enlarged view of point C;

[0047] Figure 7 This is a schematic diagram illustrating the relative positions of the feeding unit and the turnover warehouse in Embodiment 1 of this application;

[0048] Figure 8 yes Figure 7 Enlarged diagram of point D;

[0049] Figure 9 This is a schematic diagram illustrating the specific structure of the adsorption element in Embodiment 1 of this application;

[0050] Figure 10 This is a schematic diagram of the specific structure of the feeding unit in Embodiment 1 of this application;

[0051] Figure 11 This is a schematic diagram illustrating the relative displacement between the first moving part and the second moving part in Embodiment 1 of this application;

[0052] Figure 12 This is a schematic diagram of the overall structure of an embodiment of this application;

[0053] Figure 13 This is a schematic diagram of the overall structure of the particle handling unit in Embodiment 1 of this application;

[0054] Figure 14 This is a cross-sectional view of the specific structure of the adsorption component in Embodiment 2 of this application;

[0055] Figure 15 This is a cross-sectional view of the overall structure of the limiting block in Embodiment 2 of this application;

[0056] Figure 16 This is a cross-sectional view of Embodiment 2 of this application, showing how the lack of granular material causes the limiting block to block the slot.

[0057] Explanation of reference numerals in the attached drawings: 10, frame; 20, movable frame; 21, slide rail; 22, sensor; 30, vibrating feeder; 31, hopper; 40, conveying track; 50, transfer hopper; 51, material platform; 52, material trough; 54, air blowing pipe; 55, slot; 56, limiting slot; 60, limiting mechanism; 61, limiting rod; 70, receiving seat; 71, receiving chamber; 80, feeding unit; 81, movable seat; 811, first moving part; 812, second moving part; 82, guide rail; 90, granular material handling unit; 100, suction head; 210, vacuum channel; 220, insertion rod; 300, limiting block; 310, return spring; 320, guide surface; 330, movable rod. Detailed Implementation

[0058] The following is in conjunction with the appendix Figure 1 - Appendix Figure 16 This application will be described in further detail.

[0059] Example 1

[0060] Reference Figure 1 Embodiment 1 of this application discloses an automatic bulk material sorting machine. The automatic bulk material sorting machine includes a frame 10, on which a slide rail 21 is provided. A movable frame 20 is slidably mounted on the slide rail 21. A first driving component (specifically a combination of a servo motor and a ball screw pair) for driving the movable frame 20 to equidistant displacement is also installed on the frame 10. Four vibrating feeding trays 30 are fixedly mounted on the movable frame 20, each having a vibrating base and a feeding tray. The discharge port of each vibrating feeding tray 30 is connected to a conveying track 40, which is also fixedly mounted on the movable frame 20, and each conveying track 40 corresponds one-to-one with a vibrating feeding tray 30. To replenish the granular material on the vibrating feeding trays 30 in a timely manner, a hopper 31 is installed on each vibrating feeding tray 30. The hopper 31 is provided with an opening and closing channel. When the weight on the vibrating feeding tray 30 decreases to a specific value, the opening and closing channel is activated, replenishing the granular material in the hopper 31 onto the vibrating feeding tray 30.

[0061] Reference Figure 1 and Figure 2 A turnover bin 50 is fixedly installed on the frame 10. The turnover bin 50 includes a material platform 51 and a material trough 52 laid on the material platform 51. The material troughs 52 are arranged in columns along a straight line.

[0062] Reference Figure 2 and Figure 3In this embodiment, the material trough 52 is a multiple of 25 of a set of conveying tracks 40 (4 tracks), that is, there are 100 columns of material troughs 52, each column can hold 200 granules. The moving frame 20 is driven by the first driving member to make equidistant displacements. Through this displacement, the conveying tracks 40 can be connected with different columns of material troughs 52, thereby realizing the feeding of material to different columns of material troughs 52.

[0063] Reference Figure 1 and Figure 2 The other end of the conveying track 40 is connected to the feed inlet of the trough 52 of the turnover bin 50, so that the granules discharged from the vibrating feeder 30 can enter the trough 52 of the turnover bin 50 through the conveying track 40. When a certain amount of granules is filled in a bin 31, the first drive unit drives the moving frame 20 to move, so that the conveying track 40 is connected to the next trough 52, and granules are continued to be filled into the next trough 52.

[0064] Reference Figure 4 More specifically, a sensor 22 is installed on the moving frame 20 along the extension direction of the conveying track 40, and the sensor 22 is located above the turnover bin 50, with the sensor 22 and the conveying track 40 correspondingly arranged. The sensor 22 can monitor the filling status of the granular material in the trough 52 in real time, promptly detecting empty material or overload, avoiding blind spots in the detection of granular material position. The sensor 22 emits a red light dot into the trough 52. When the granular material fills to the red light dot, the first driving component drives the moving frame 20 to move at an equidistant distance, connecting the conveying track 40 with the next trough 52.

[0065] Reference Figure 5 and Figure 6 The frame 10 is also slidably mounted with a receiving seat 70, which has multiple receiving chambers 71. Each receiving chamber 71 corresponds to a material trough 52. Each receiving chamber 71 receives only a single particle. The frame 10 is equipped with a second driving component (specifically a cylinder) for driving the receiving seat 70 to move closer to or away from the turnover bin 50.

[0066] In addition, an air blowing pipe 54 corresponding to the material trough 52 is installed above the material platform 51. The air blowing pipe 54 is connected to a main pipe, which is connected to an air pump, so that the air blowing pipe 54 outputs pressurized gas. The air blowing pipe 54 can blow air in a direction to the granular material in the material trough 52, pushing the granular material to move in an orderly manner in the material trough 52, ensuring smooth feeding.

[0067] Reference Figure 7 and Figure 8A limiting mechanism 60 is installed on the frame 10 above the transfer bin 50. The limiting mechanism 60 includes a rotatable limiting rod 61 and a motor for driving the limiting rod 61 to rotate. The output shaft of the motor is fixedly connected to the limiting rod 61. The function of the limiting rod 61 is to simultaneously press against the same row of granules in the multi-row material trough 52. Specifically, when the limiting rod 61 rotates downward, it will press against the second-to-last row of granules. The receiving seat 70 is also equipped with an adsorption component for sucking up the granules. Through the action of the adsorption component, the last row of granules can be stably received in the receiving cavity 71.

[0068] Reference Figure 9 The adsorption component includes a vacuum channel 210, the channel opening of which is connected to the receiving chamber 71. The vacuum channel 210 is connected to a vacuum generator. When the receiving seat 70 is close to the turnover bin 50, the receiving chamber 71 is aligned with the material trough 52. The vacuum generator is turned on, and the negative pressure suction is used to suck up the granular material. The granular material in the last row of the turnover bin 50 can be sucked into the receiving chamber 71.

[0069] Reference Figure 7 The frame 10 is equipped with two feeding units 80, and there are also two corresponding mobile frames 20 and turnover bins 50.

[0070] Reference Figure 10 The feeding unit 80 includes a movable seat 81 and a guide rail 82. The guide rail 82 is fixed on the frame 10. The movable seat 81 of the feeding unit 80 slides on the guide rail 82. A fixture for receiving granular material is placed on the movable seat 81. A third driving component (specifically a linear motor) is provided on the frame 10 to drive the movable seat 81 to move equidistantly along the guide rail 82, so as to realize the granular material being filled into the fixture in an orderly manner.

[0071] Reference Figure 7 and Figure 11 The movable seat 81 includes a first movable part 811 and a second movable part 812. A third driving member drives the first movable part 811 to move along the length direction of the guide rail 82. A fourth driving member (specifically a rodless cylinder) is installed on the first movable part 811 to drive the second movable part 812 to move horizontally. The two feeding units 80 share a suction head 100. The two second movable parts 812 alternately move horizontally to below the suction head 100 so that the suction head 100 can draw the granular material into the printing press (not shown in the figure).

[0072] Reference Figure 12 and 13The frame 10 is also equipped with a granular material handling unit 90. The function of the granular material handling unit 90 is to pick up the granular material from the receiving seat 70 and place it onto the moving seat 81 fixture, completing the transfer of the granular material from the receiving seat 70 to the fixture. Specifically, the granular material handling unit 90 is a PPU rapid pick-and-place unit. Specifically, PPU stands for: P (grab a workpiece or product from a specified position), P (precisely place the grasped workpiece or product to another specified position), and U (emphasizing that it is an independent, modular functional unit that can be easily integrated into an automated production line or workstation). The PPU rapid pick-and-place unit is a high-performance, modular material handling actuator in the field of industrial automation. As it is existing technology, this application will not elaborate further.

[0073] Additionally, the first, second, third, and fourth driving components are mainly used to achieve equidistant translation of parts, which can be achieved by a combination of a servo motor and a ball screw pair, or a cylinder, etc. This is existing technology and will not be elaborated further in this application.

[0074] The implementation principle of the automatic bulk material sorting machine in Embodiment 1 of this application is as follows:

[0075] Multiple vibrating feeding trays 30 sort the bulk materials and then transport them to the material troughs 52 of the turnover bin 50 via corresponding conveying tracks 40. The material troughs 52 are arranged in columns. The moving frame 20 is displaced at equal intervals under the action of the first driving component, causing the conveying tracks 40 to switch to different columns of material troughs 52 to achieve continuous feeding. The receiving seat 70 approaches the turnover bin 50 via the second driving component, and the adsorption component sucks up the last row of granular materials. After the receiving seat 70 moves away from the turnover bin 50, the granular materials are carried to the receiving chamber 71 and picked up by the granular material pick-and-place unit 90. The feeding unit 80... In the process, the movable seat 81 is equidistantly displaced on the guide rail 82 by the third driving component. The running path of the third driving component can be set by the program. When the fixture is filled with granules, the third driving component drives the movable seat 81 to move linearly. The first moving part 811 of the movable seat 81 drives the second moving part 812 to move. The fourth driving component on the two movable seats 81 alternately moves the second moving part 812 to below the suction head 100. Finally, the suction head 100 transfers the granules to the printing press, and the movable seat 81 resets, so that the fixture continues to be filled with granules.

[0076] Example 2

[0077] This embodiment has the same basic structure and principle as Embodiment 1. The following mainly describes the technical features of the different parts.

[0078] Reference Figure 14The receiving seat 70 is equipped with magnetic inserts 220, and each receiving cavity 71 has one fixedly installed insert 220. The width of the insert 220 is smaller than the width of the receiving cavity 71. When the receiving seat 70 approaches the turnover bin 50, the slot 55 on the bottom wall of the material trough 52 allows the insert 220 to be inserted. At this time, the last row of granules in the turnover bin 50 is above the insert 220 and will be attracted by the insert 220. When the second drive unit controls the receiving seat 70 to leave the turnover bin 50, the granules leave the turnover bin 50 along with the insert 220. When the receiving seat 70 leaves the turnover bin 50 and stops moving, the granule picking and placing unit 90 picks up the granules on the receiving seat 70 and places them on the fixture, completing the transfer of the granules from the receiving seat 70 to the fixture.

[0079] Reference Figure 15 Furthermore, a limiting block 300 is slidably installed inside the material trough 52. A limiting groove 56 is formed on the bottom wall of the material trough 52 to accommodate the limiting block 300. The limiting groove 56 is connected to the slot 55. A return spring 310 is installed inside the limiting groove 56. One end of the return spring 310 is fixedly connected to the limiting block 300, and the other end abuts against the bottom of the limiting groove 56. Under the elastic force of the return spring 310, part of the limiting block 300 extends out of the limiting groove 56 and also extends into the material trough 52. A guide surface 320 is formed at the upper end of the limiting block 300. The last row of granules in the turnover bin 50 abuts against the limiting block 300, and the limiting block 300 has a contact surface that contacts the granules. When the insert rod 220 is inserted into the slot 55, it will first contact the guide surface 320. The granules will have a limiting effect on the limiting block 300, allowing the limiting block 300 to be pushed back into the limiting groove 56. The granules will then lose their obstruction and be attracted by the insert rod 220.

[0080] A movable rod 330 is also provided in the limiting groove 56, and the movable rod 330 is hinged in the limiting groove 56 via a rotating shaft. A return spring 310 is sleeved on the movable rod 330, and the limiting block 300 can slide up and down along the movable rod 330. The limiting block 300 has a sliding groove for the movable rod 330 to slide, and one end of the movable rod 330 is always located in the sliding groove.

[0081] Reference Figure 16 When the portion of the limiting block 300 extending beyond the slot 55 leaves a gap with the granular material, indicating a lack of granular material, and the insert rod 220 is inserted along the slot 55, the limiting block 300, without granular material for support, is pushed by the insert rod 220, causing the movable rod 330 to rotate. Ultimately, the limiting block 300 abuts against the side wall of the limiting groove 56 and seals the slot 55. A displacement sensor is installed on the receiving seat 70, electrically connected to an alarm. When the insert rod 220 abuts against the limiting block 300 that has sealed the slot 55, the displacement sensor transmits an abnormal displacement signal to the alarm, causing the alarm to sound and promptly alerting the operator to investigate.

[0082] The implementation principle of the automatic bulk material sorting machine in Embodiment 2 of this application is as follows:

[0083] The receiving seat 70 approaches the turnover bin 50 via the second driving component, and the magnetic insert rod 220 is inserted into the slot 55 at the bottom of the material trough 52. At this time, the limiting block 300 in the material trough 52 retracts under the pressure of the granules, and the insert rod 220 adsorbs the last row of granules. After the receiving seat 70 moves away, the granules are carried away from the turnover bin 50. If there is a lack of granules, the limiting block 300 blocks the slot 55, and the insert rod 220 is obstructed, causing the receiving seat 70 to move abnormally. The displacement sensor triggers the alarm, which promptly prompts the operator to investigate.

[0084] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic bulk material sorting machine, characterized in that, include: Rack (10) A movable frame (20) is slidably mounted on the frame (10); Vibrating feeding trays (30) are fixedly installed on the movable frame (20), and multiple trays are provided. The material conveying track (40) is fixedly installed on the movable frame (20), and one end of the material conveying track (40) is connected to the vibrating feeding plate (30). The material conveying track (40) and the vibrating feeding plate (30) correspond one-to-one. The turnover bin (50) is fixedly installed on the frame (10) and includes a material platform (51) and a material trough (52) laid on the material platform (51). The material troughs (52) are arranged in columns. The other end of the conveying track (40) is connected to the material trough (52) of the turnover bin (50). The number of material troughs (52) is an integer multiple of the number of conveying tracks (40). The first driving member drives the moving frame (20) to move at equal distances, so that the material conveying track (40) and the different material troughs (52) are connected; The limiting mechanism (60), installed on the frame (10) and located above the turnover bin (50), includes a rotatably configured limiting rod (61) for simultaneously pressing against the same row of granular material in multiple rows of troughs (52); The receiving seat (70) is slidably installed on the frame (10) and is provided with multiple receiving cavities (71). The receiving cavities (71) correspond one-to-one with the material trough (52). The receiving cavity (71) only receives a single particle. The receiving seat (70) is provided with an adsorption element for sucking up the particle. The receiving seat (70) receives the last row of particles from the turnover bin (50). The limiting rod (61) is used to press down the second row of particles. The second driving component is used to drive the receiving seat (70) closer to or further away from the turnover bin (50). The feeding unit (80) includes a movable seat (81) and a guide rail (82), the movable seat (81) slides on the guide rail (82), and a fixture for receiving granular material is placed on the movable seat (81); The pellet material handling unit (90) is used to pick up the pellet material on the receiving seat (70) and place the pellet material on the fixture; The third driving component is used to drive the movable seat (81) to move at equal distances along the guide rail (82) so that the granular material is filled into the fixture in an orderly manner; A suction head (100) is used to draw granular material from the movable seat (81) into the printing press.

2. The automatic bulk material sorting machine according to claim 1, characterized in that, The frame (10) is provided with an air blowing pipe (54) above the material platform (51), and the air blowing pipe (54) and the material trough (52) correspond one-to-one.

3. The automatic bulk material sorting machine according to claim 1, characterized in that, At least two feeding units (80) are provided.

4. The automatic bulk material sorting machine according to claim 3, characterized in that, The movable seat (81) includes a first movable part (811) and a second movable part (812). The first movable part (811) moves along the length direction of the guide rail (82). The two feeding units (80) share a suction head (100). The first movable part (811) is provided with a fourth driving member that drives the second movable part (812) to translate. The two second movable parts (812) alternately translate to below the suction head (100).

5. The automatic bulk material sorting machine according to claim 1, characterized in that, A sensor (22) is provided on the mobile frame (20), the sensor (22) is arranged along the extension direction of the conveying track (40), and the sensor (22) is located above the turnover bin (50).

6. The automatic bulk material sorting machine according to claim 1, characterized in that, The adsorption element includes a vacuum channel (210), the channel opening of the vacuum channel (210) is connected to the receiving chamber (71), and the vacuum channel (210) is connected to a vacuum generator.

7. The automatic bulk material sorting machine according to claim 1, characterized in that, The adsorption component includes a magnetic insert (220), which is fixedly installed in the receiving cavity (71) and partially extends out of the receiving cavity (71). The insert (220) and the material trough (52) are correspondingly arranged. When the receiving seat (70) is close to the turnover bin (50), the bottom wall of the material trough (52) is provided with a slot (55) for inserting the insert (220). The last row of granules on the turnover bin (50) is located above the insert (220), and the granules are adsorbed onto the insert (220).

8. The automatic bulk material sorting machine according to claim 7, characterized in that, The feed trough (52) is slidably mounted with a limiting block (300). The feed trough (52) has a limiting groove (56) for accommodating the limiting block (300). The limiting groove (56) is connected to the slot (55). A return spring (310) is installed in the limiting groove (56) to drive the limiting block (300) to extend out of the limiting groove (56). One end of the return spring (310) is fixedly connected to the limiting block (300), and the other end of the return spring (310) is fixedly mounted. Within the limiting groove (56), the last row of granules in the turnover bin (50) abuts against the limiting block (300). The portion of the limiting block (300) extending out of the limiting groove (56) also extends out of the slot (55) and has a guide surface (320). When the granules abut against the limiting block (300), the insert rod (220) first contacts the guide surface (320) when it is inserted into the slot (55), causing the limiting block (300) to be pushed back into the limiting groove (56) by the insert rod (220).

9. The automatic bulk material sorting machine according to claim 8, characterized in that, A movable rod (330) is provided in the limiting groove (56). The reset spring (310) is sleeved on the movable rod (330). The limiting block (300) slides up and down on the movable rod (330). The movable rod (330) is hinged in the limiting groove (56). When the part of the limiting block (300) extending out of the slot (55) leaves a gap with the granular material, the insert rod (220) is inserted along the slot (55). The limiting block (300) abuts against the side wall of the limiting groove (56) as the movable rod (330) rotates, and the limiting block (300) blocks the slot (55). The receiving seat (70) is equipped with a displacement sensor, which is electrically connected to an alarm. When the insert rod (220) abuts against the limiting block (300) in the blocked slot (55) state, the displacement sensor signal is transmitted to the alarm, and the alarm sounds an alarm.

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