Full-automatic multi-combination printing unit

Abstract

A full-automatic multi-combination printer set comprises a plurality of unit printers of the same structure, and the unit printers can be infinitely spliced, uniformly fed and uniformly returned according to different printing quantities; the unit printers are arranged in a line, all feeding ports face one side and are in butt joint with the feeding track through the feeding track, and all discharging ports face the other side and are in butt joint with the discharging track through the discharging track. Each section of feeding track and each section of material returning track are provided with proximity switches, and the inner end of the feeding track is further provided with a material receiving switch; the printing platform runs on the feeding track, the material returning track, the feeding track and the discharging track. The unit printers can be infinitely added, materials are continuously fed to all the unit printer sets from the feeding table through the feeding track, printed objects are continuously returned to the discharging table through the material returning track, the printing speed is high, the automation degree is high, and manpower and material resources are saved.

Description

Technical Field

[0001] The invention relates to a printer, in particular to a full-automatic multi-combination printer group. Background Art

[0002] Toy factories need to print patterns on the surface of toys, wine bottle factories need to print patterns on the surface of bottles, and medicine bottle factories need to print patterns on the surface of plastic medicine bottles. More and more products have changed from labeling to printing. Faced with this development situation that requires batch printing of surface patterns of objects, the existing single combination printing mode is far from meeting market demand. Summary of the invention

[0003] In order to solve the problems existing in the above technologies, the present invention provides a multi-combination printer group with automatic feeding and automatic material return.

[0004] A fully automatic multi-combination printer group is composed of five unit printer groups. The number of unit printer groups can be increased or decreased according to the increase or decrease of printing workload. Two adjacent unit printer groups are connected by a transfer mechanism. Each unit printer group has the same structure and coordinates with each other to uniformly feed and return materials. It is characterized in that: The unit printer group is provided with a control component, and the control component comprises: A PLC industrial control module, used for receiving a working signal of each unit printer group and sending a first control signal and a second control signal based on the working signal, wherein the first control signal is a motor start signal and the second control signal is a proximity switch interlock signal; The main control module is installed on the printer head mainboard and is used to control the printer nozzle, X-axis, Y-axis, Z-axis and ink cartridge negative pressure system; A feeding proximity switch, used for receiving a first control signal to start the feeding motor and receiving a second control signal to lock and shut down the previous feeding motor; A feed proximity switch, interlocked with the feed proximity switch, for receiving a first control signal to start the feed motor and receiving a second control signal to turn off the feed motor; The filling fixture proximity switch is interlocked with the feed proximity switch, and is used to receive a first control signal to start the filling motor and the fixture opening and closing motor, and receive a second control signal to close the feed motor; The printer head proximity switch is interlocked with the position filling and fixture proximity switches, and is used to receive a first control signal to start the printing mode and receive a second control signal to turn off the position filling motor and the fixture opening and closing motor. After printing is completed, the printing mode is turned off and the position filling motor and the fixture opening and closing motor are turned on again; The material discharging proximity switch is interlocked with the position-filling fixture proximity switch, and is used to receive a first control signal to start the material discharging motor and receive a second control signal to shut down the position-filling motor and the fixture opening and closing motor; The material return proximity switch is interlocked with the material discharge proximity switch and is used to receive a first control signal to start the material return motor and receive a second control signal to close the material discharge motor; The communication module is used to receive external signals, including signals sent by the PLC industrial control module and signals sent by the main control module; The power module is used to supply power to the PLC industrial control module.

[0005] The unit printer group includes a frame, a feeding track, a return track, a feed track, a printing platform, a printer head, a transfer device, a discharge track, a printing fixture, a filling device and a fixture opening and closing device. The feeding tracks of each unit printer group are connected by a transfer device, and the connected feeding tracks are arranged in a straight line as a feeding line A. The return tracks of each printer group are connected by a transfer device, and the connected return tracks are arranged in a straight line as a return line B.

[0006] The feed track and the discharge track are respectively arranged at the front end and the rear end of the printer head, respectively providing the printer head with materials to be printed and transporting the printed materials away, the feed track is connected between the feed port of the printer head and line A, the discharge track is connected between the discharge port of the printer head and line B, the printing fixture is installed between the feed track and the discharge track, and the printer head is installed above the printing fixture; the printing platform runs on line A, line B, the feed track and the discharge track.

[0007] The printing platform includes a base plate, which is configured as a top surface and a bottom surface, the top surface is provided with a material placing surface, the bottom surface is provided with a four-disc lateral thrust bearing, a proximity sensor is provided at the front end of the bottom left side of the printing platform in the feeding direction, and a filling rack is provided at the bottom rear side in the feeding direction. The bottom of the printing platform is also provided with four slide grooves, two of which are lateral slide grooves, and the other two are longitudinal slide grooves. The spacing between the slide grooves is equal, and the four slide grooves intersect vertically to form four intersection sites.

[0008] The feeding track includes a supporting groove, a feeding proximity switch, a double-row guide rail, a transmission belt, a push plate and a transmission motor. There are two double-row guide rails, which are respectively arranged on both sides of the feeding track. The transmission belt is arranged in the hollow position of the two double-row guide rails. There are N push plates, which are equidistantly arranged on the transmission belt. The feeding transmission motor is arranged on the frame to drive the transmission belt to rotate. The push plate is clamped at the bottom of the printing platform and pushes the printing platform forward as the transmission belt rotates. The feeding proximity switch is arranged on the frame outside the starting end of each section of the double-row guide rail and is used to start the feeding transmission motor in an inductive manner with the proximity sensor, and to close the feeding transmission motor by approaching the next adjacent sensing object. The supporting groove cooperates with the transverse thrust bearing to support the printing platform on the double-row guide rail.

[0009] The printing fixture includes a clamping hole, a clamping plate, a compression end and a reset end. The clamping hole is arranged on the clamping surface of the clamping plate and is used to store the lever at the bottom of the printing platform. The compression end is used to open the clamping plate by thrust, and the reset end is used to reset the clamping plate after the thrust is released. A filling motor is arranged on the right side of the printing fixture, and a filling gear is arranged on the filling motor. The filling gear is meshed with the filling rack. The filling motor drives the filling gear to rotate, and brings the printing platform to the top of the fixture. A fixture opening and closing motor is arranged on the side of the printing fixture close to the discharge track. The fixture opening and closing motor is used to open and close the fixture. A linear push rod is arranged at the end of the fixture opening and closing motor, and the linear push rod is pressed against the compression end of the printing fixture.

[0010] The transfer mechanism is arranged at the track docking point of the unit printer group and the docking point of the feed track and the feed track of a single unit printer group, as well as the docking point of the discharge track and the return track, serving as a transition plate for the printing platform to transfer from one track to another track; the transfer mechanism includes four support columns, four thrust bearings installed on the four support columns, and four rolling steel balls installed on the top of the four thrust bearings, with the steel balls being equidistant from each other. When the printing platform is pushed onto the transfer mechanism, the four steel balls fall exactly into the four positions of the four slide grooves, so that the printing platform can move along the horizontal slide groove as well as along the longitudinal slide groove.

[0011] The feed track is provided with a feed motor and a feed proximity switch. The feed proximity switch is installed on the rear side of the transfer mechanism on one side of line A, and the feed motor is installed on the frame below the starting end of the feed track.

[0012] A loading station TA is provided at the starting end of the A line, and materials are continuously fed to the printer group manually. A unloading station TB is provided at the terminal end of the B line, and the returned materials are packaged and recycled manually.

[0013] The beneficial effect of the present invention is that the unit printer groups can be increased infinitely, and materials can be continuously fed from the loading table to each unit printer group through a feeding track, and the printed materials can be continuously returned to the unloading table through a return track. The printing speed is fast, the degree of automation is high, and manpower and material resources are saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a general assembly structure diagram of multiple printer groups of the present invention; Figure 2 It is a structural diagram of a single printer group of the present invention; Figure 3 It is a structural diagram of the feed track and the feed track transition of the present invention; Figure 4 It is a structural diagram of the printing fixture installation of the present invention; Figure 5It is a bottom structural diagram of the printing platform of the present invention; Figure 6 It is the structural diagram of the transfer mechanism of the present invention; Figure 7 This is the industrial control principle diagram of two adjacent printer groups of the present invention; Figure 8 is an enlarged view of the feed track and the printing fixture of the present invention; Fig. 9 It is an enlarged view of the invented discharge track and transfer mechanism; In the figure: 1, frame; 2, feeding track; 20, supporting groove; 21, feeding proximity switch; 22, double-row guide rail; 23, transmission belt; 24, push plate; 25, feeding motor; 3, unloading track; 31, unloading proximity switch; 32, unloading motor; 4, feeding track; 41, feeding proximity switch; 42, feeding motor; 5, printing platform; 50, lateral thrust bearing; 51, proximity sensor; 52, filling rack; 53, position point; 54, base plate; 55, slide groove; 56, lever; 6. Printer head; 61. Printing motor; 7. Transfer mechanism; 71. Thrust bearing; 72. Support column; 73. Steel ball; 8. Discharge track; 81. Discharge proximity switch; 82. Discharge motor; 9. Printing fixture; 90. Clamping hole; 91. Clamping plate; 92. Compression end; 93. Reset end; 10. Repositioning device; 101. Repositioning fixture proximity switch; 102. Repositioning motor; 103. Repositioning gear; 11. Fixture opening and closing device; 111. Linear ejector; 112. Fixture opening and closing motor. DETAILED DESCRIPTION

[0015] The present invention is further explained clearly and completely below in conjunction with the accompanying drawings and specific embodiments. The described embodiments are only some embodiments of the present invention. For those skilled in the art, other embodiments obtained without creative work all belong to the scope of protection of the present invention.

[0016] like Figure 1 As shown, the present invention is a fully automatic multi-combination printer group.

[0017] like Figure 1 and 2 As shown, the present invention is composed of five unit printer groups. The number of unit printer groups can be increased or decreased according to the increase or decrease of printing workload. Two adjacent unit printer groups are connected by a transfer mechanism. The unit printer groups have the same structure and coordinate with each other to perform unified feeding and unified returning of materials.

[0018] like Figure 1 and 7 As shown, the unit printer group is provided with a control component, and the control component includes: A PLC industrial control module, used for receiving a working signal of each unit printer group and sending a first control signal and a second control signal based on the working signal, wherein the first control signal is a motor start signal and the second control signal is a proximity switch interlock signal; The main control module is installed on the printer head mainboard and is used to control the printer nozzle, X-axis, Y-axis, Z-axis and ink cartridge negative pressure system; A feeding proximity switch 21, used for receiving a first control signal to start a feeding motor 25 and receiving a second control signal to lock and shut down a previous feeding motor 25; A feed proximity switch 41, interlocked with the feed proximity switch 21, is used to receive a first control signal to start the feed motor 42 and receive a second control signal to turn off the feed motor 25; The filling fixture proximity switch 101 is interlocked with the feed proximity switch 41, and is used to receive a first control signal to start the filling motor 102 and the fixture opening and closing motor 112, and receive a second control signal to close the feed motor 42; The printer head proximity switch 61 is interlocked with the position-filling and clamp proximity switch 101, and is used to receive a first control signal to start the printing mode and receive a second control signal to turn off the position-filling motor 102 and the clamp opening and closing motor 112. After printing is completed, the printing mode is turned off and the position-filling motor 102 and the clamp opening and closing motor 112 are turned on again; The material discharging proximity switch 81 is interlocked with the position-filling fixture proximity switch 101, and is used to receive a first control signal and start the material discharging motor 82, and receive a second control signal to turn off the position-filling motor 102 and the fixture opening and closing motor 112; The material return proximity switch 31 is interlocked with the material discharge proximity switch 81, and is used to receive a first control signal to start the material return motor 32 and receive a second control signal to turn off the material discharge motor 82; The communication module is used to receive external signals, including signals sent by the PLC industrial control module and signals sent by the main control module; The power module is used to supply power to the PLC industrial control module.

[0019] like Figure 2 and 4 As shown, the unit printer group includes a frame 1, a feeding track 2, a return track 3, a feed track 4, a printing platform 5, a printer head 6, a transfer device 7, a discharge track 8, a printing fixture 9, a replenishing device 10 and a fixture opening and closing device 11. The feeding tracks 2 of each unit printer group are connected by the transfer device 7, and the connected feeding tracks 2 are arranged in a straight line as the feeding A line. The return tracks 3 of each printer group are connected by the transfer device 7, and the connected return tracks 3 are arranged in a straight line as the return B line.

[0020] The feed track 4 and the discharge track 8 are respectively arranged at the front end and the rear end of the printer head 6, respectively providing the printer head 6 with materials to be printed and transporting the printed materials away. The feed track 4 is connected between the feed port of the printer head 6 and the A line, and the discharge track 8 is connected between the discharge port of the printer head 6 and the B line. The printing fixture 9 is installed between the feed track 4 and the discharge track 8.

[0021] The printer head 6 is installed above the printing fixture 9; the printing platform 5 runs on the A line, the B line, the feed track 4 and the discharge track 8.

[0022] like Figure 5 As shown, the printing platform 5 includes a base plate 54, and the base plate 54 is set as a top surface and a bottom surface. The top surface is provided with a material placing surface 60, and the bottom surface is provided with a four-disc lateral thrust bearing 50. A proximity sensor 51 is provided at the front end of the bottom left side of the printing platform 5 in the feeding direction, and a filling rack 52 is provided at the bottom rear side in the feeding direction. Four slide grooves 55 are also provided at the bottom of the printing platform 5, two of which are lateral slide grooves, and the other two are longitudinal slide grooves. The spacing between the slide grooves is equal, and the four slide grooves 55 intersect vertically to form four intersection points 53.

[0023] like Figure 1 , 2 The feeding track 2 includes a supporting groove 20, a feeding proximity switch 21, a double-row guide rail 22, a transmission belt 23, a push plate 24 and a transmission motor 25. There are two double-row guide rails 22, which are respectively arranged on both sides of the feeding track 2. The transmission belt 23 is arranged in the hollow position of the two double-row guide rails 22. There are N push plates 24, which are equidistantly arranged on the transmission belt 23. The feeding transmission motor 25 is arranged on the frame to drive the transmission belt 23 to rotate. The push plate 24 is stuck at the bottom of the printing platform 5, and the printing platform 5 is pushed forward as the transmission belt 23 rotates. The feeding proximity switch 21 is arranged on the frame outside the starting end of each section of the double-row guide rail 22, and is used to start the feeding transmission motor 25 in an inductive manner with the proximity sensor 51, so as to close the feeding transmission motor 25 when approaching the next adjacent sensing object. The supporting groove 20 cooperates with the lateral thrust bearing 50 to support the printing platform 5 on the double-row guide rail 22.

[0024] like Figure 2 , 3As shown in , 5 and 7, in order for the printing platform 5 to be smoothly transferred from the feeding track 2 to the feeding track 4, a transfer mechanism 7 is provided at the joint of two adjacent double-row guide rails 22 and at the joint of the feeding track 2 and the feeding track 4. The inner side of the transfer mechanism 7 is connected to the feeding track 4, and the front and rear ends of the transfer mechanism 7 are respectively connected to the two double-row guide rails 22. When the printing platform 5 is fed onto the transfer mechanism 7, when there is no printing platform 5 on the corresponding feeding track 4, the transmission motor of the feeding track 4 is preferentially turned on by the proximity switch, and the proximity switch of the next feeding track 4 is locked at the same time. The printing platform 5 is brought into the printing fixture 9 by the feeding track 4 with the right side on the feeding track as the front, and is clamped and fixed, and then printing begins.

[0025] like Figure 4 As shown, the printing fixture 9 includes a clamping hole 90, a clamping plate 91, a compression end 92 and a reset end 93. The clamping hole 90 is provided on the clamping surface of the clamping plate 91 and is used to store the lever 56 at the bottom of the printing platform 5. The compression end 92 is used to open the clamping plate 91 by thrust, and the reset end 93 is used to reset the clamping plate 91 after the thrust is released.

[0026] like Figure 4 and 5 As shown, a repositioning motor 102 is provided on the right side of the printing fixture 9, and a repositioning gear 103 is provided on the repositioning motor 102. When the feed track 4 feeds the printing platform 5 to the vicinity of the printing fixture 9, in order to accurately position the printing platform 5 within the printing range, the repositioning rack 52 on the right side of the printing platform 5 engages with the repositioning gear 103, and the repositioning motor 102 drives the repositioning gear 103 to rotate, bringing the printing platform 5 to the top of the fixture. After printing is completed, the repositioning motor 102 is started again to feed the printing platform 5 onto the discharge track 8. A fixture opening and closing motor 112 is provided on the side of the printing fixture 9 close to the discharge track 8. The fixture opening and closing motor 112 is used to open and close the fixture 9. A linear push rod 111 is provided at the end of the fixture opening and closing motor 112, and the linear push rod 111 is pressed against the compression end of the printing fixture 9.

[0027] like Figure 2 , 3As shown in 6, the transfer mechanism 7 is arranged between two adjacent feeding tracks 2 and at the joint of the feed track 4, as well as at the joint of the discharge track 8 and the two adjacent return tracks 3, as a transition plate for the printing platform 5 to transfer from one track to another track; the two feeding proximity switches 21 of the two feeding tracks 2 connected to the same transfer mechanism 7 and the feeding proximity switch 41 of the feed track 4 are interlocking switches. When there is a printing platform 5 on the feed track 4, when the proximity sensor 51 of the printing platform 5 resting on the transfer mechanism 7 approaches the feeding proximity switch 21 and the feeding proximity switch 41 at the same time, the feeding proximity switch 21 is triggered and turned on successively; when there is no printing platform 5 on the feed track 4, the feeding proximity switch 21 is locked, and the printing platform 5 resting on the transfer mechanism 7 runs along the feed track 4 and enters under the printer head 6.

[0028] When the printing platform 5 moves to the end of the material track 2, the feeding transmission belt 23 drives the printing platform 5 to run on the transfer mechanism 7. At this time, the proximity sensor 51 of the printing platform 5 is close to the feeding proximity switch 21 of the next section of the feeding track, and the feeding transmission motor 25 of the next section of the feeding track starts to rotate, and the printing platform 5 crosses the transfer mechanism 7 and enters the next section of the feeding track 2.

[0029] like Figure 4 As shown, the feed track 4 is provided with a feed motor 42 and a feed proximity switch 41. The feed proximity switch 41 is installed on the rear side of the transfer mechanism 7 on one side of line A, and the feed motor 42 is installed on the frame below the starting end of the feed track 4. When there is a printing platform 5 on the printing fixture 9, the feed motor 42 is locked, and the printing platform 5 parked on the transfer mechanism 7 senses the next feed proximity switch 21. The printing platform 5 will not enter the feed track 4, but continue to move forward along the feed track 2. When there is no printing platform 5 on the printing fixture 9, the feed proximity switch 41 is triggered to turn on, and the printing platform 5 parked on the transfer mechanism 7 enters the printing fixture 9 along the feed track 4.

[0030] like Figure 2 and 5 As shown, the transfer mechanism 7 includes four supporting columns 72, four thrust bearings 71 installed on the four supporting columns 72, and four rolling steel balls 73 installed on the top of the four thrust bearings 71. The distances between the steel balls 73 are equal. When the printing platform 5 is pushed onto the transfer mechanism 7, the four steel balls 73 just fall into the four positions 53 of the four slide grooves, so that the printing platform 5 can move along the horizontal slide groove and the longitudinal slide groove.

[0031] like Figure 7As shown, the sensing signals of the proximity sensor 51 and the proximity switches of each unit printer group are transmitted to the PLC industrial control module for processing by wired or wireless means, and the PLC industrial control modules of each unit printer group transmit signals through the communication module.

[0032] The working principle of the switching mechanism 7 between the discharging track 8 and the returning track 3 is the same as that of the switching mechanism 7 between the feeding track 2 and the feeding track 4, which will not be described in detail.

[0033] A loading station TA is provided at the starting end of the A line, and materials are continuously fed to the printer group manually. A unloading station TB is provided at the terminal end of the B line, and the returned materials are packaged and recycled manually.

[0034] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fully automatic multi-combination printer group, composed of five unit printer groups, the number of which can be increased or decreased according to the increase or decrease of printing workload, characterized in that: Two adjacent unit printer groups are connected via a transfer mechanism. The unit printer groups have the same structure and coordinate with each other to perform unified feeding and unified returning. The unit printer group comprises a frame (1), a feeding track (2), a returning track (3), a feeding track (4), a printing platform (5), a printer head (6), a transfer device (7), a discharging track (8), a printing fixture (9), a position-filling device (10) and a fixture opening and closing device (11). The feeding tracks (2) of each unit printer group are connected via a transfer device (7). The connected feeding tracks (2) are arranged in a straight line as a feeding line A. The returning tracks (3) of each printer group are connected via a transfer device (7). The connected returning tracks (3) are arranged in a straight line as a returning line B.

2. A fully automatic multi-combination printer set according to claim 2, characterized in that: The feed track (4) and the discharge track (8) are respectively arranged at the front end and the rear end of the printer head (6), and respectively provide the printer head (6) with materials to be printed and transport the printed materials. The feed track (4) is connected between the feed port of the printer head (6) and line A, and the discharge track (8) is connected between the discharge port of the printer head (6) and line B. The printing fixture (9) is installed between the feed track (4) and the discharge track (8), and the printer head (6) is installed above the printing fixture (9); the printing platform (5) runs on line A, line B, the feed track (4) and the discharge track (8).

3. A fully automatic multi-combination printer set according to claim 2, characterized in that: The printing platform (5) comprises a base plate (54), wherein the base plate (54) is configured as a top surface and a bottom surface, wherein the top surface is provided with a material placement surface (60), and the bottom surface is provided with a four-disc lateral thrust bearing (50). A proximity sensor (51) is provided at the front end of the bottom left side of the printing platform (5) in the feeding direction, and a filling rack (52) is provided at the bottom rear side in the feeding direction. The bottom of the printing platform (5) is also provided with four slide grooves (55), wherein two of the slide grooves are lateral slide grooves and the other two are longitudinal slide grooves. The distances between the slide grooves are equal, and the four slide grooves (55) intersect vertically to form four intersection sites (53).

4. A fully automatic multi-combination printer set according to claim 2, characterized in that: The feeding track (2) comprises a supporting groove (20), a feeding proximity switch (21), a double-row guide rail (22), a transmission belt (23), a push plate (24) and a transmission motor (25). The double-row guide rail (22) has two, which are respectively arranged on both sides of the feeding track (2). The transmission belt (23) is arranged in a hollow position between the two double-row guide rails (22). There are N push plates (24) which are arranged on the transmission belt (23) at equal distances. The feeding transmission motor (25) is arranged on the frame and is used to drive the transmission belt (23) to rotate. The push plate (24) is stuck at the bottom of the printing platform (5), and the printing platform (5) is pushed forward as the transmission belt (23) rotates. The feed proximity switch (21) is arranged on the frame outside the starting end of each section of the double-row guide rail (22), and is used to start the feed transmission motor (25) in an inductive manner with the proximity sensor (51), so as to close the feed transmission motor (25) when approaching the next adjacent sensing object. The support groove (20) cooperates with the lateral thrust bearing (50) to support the printing platform (5) on the double-row guide rail (22).

5. The fully automatic multi-combination printer set according to claim 2, characterized in that: The printing fixture (9) comprises a clamping hole (90), a clamping plate (91), a compression end (92) and a reset end (93); the clamping hole (90) is provided on the clamping surface of the clamping plate (91) and is used to store the lever (56) at the bottom of the printing platform (5); the compression end (92) is used to open the clamping plate (91) by thrust; and the reset end (93) is used to reset the clamping plate (91) after the thrust is released; a repositioning motor (102) is provided on the right side of the printing fixture (9); and a repositioning gear ( 103), the filling gear (103) is meshed with the filling rack (52), and the filling motor (102) drives the filling gear (103) to rotate, so as to bring the printing platform (5) to the top of the fixture; a fixture opening and closing motor (112) is provided on the side of the printing fixture (9) close to the discharge track (8), and the fixture opening and closing motor (112) is used to open and close the fixture (9), and a linear push rod (111) is provided at the end of the fixture opening and closing motor (112), and the linear push rod (111) is pressed against the compression end of the printing fixture (9).

6. A fully automatic multi-combination printer set according to claim 2, characterized in that: The transfer mechanism (7) is arranged at the joint of the tracks of the unit printer group and the joint of the feeding track (2) and the feeding track (4) of the single unit printer group, as well as the joint of the discharging track (8) and the returning track (3), and serves as a transition plate for the printing platform (5) to transfer from one track to another track; the transfer mechanism (7) includes four supporting columns (72), four thrust bearings (71) mounted on the four supporting columns (72), and four rolling steel balls (73) mounted on the top of the four thrust bearings (71), and the distances between the steel balls (73) are equal. When the printing platform (5) is pushed onto the transfer mechanism (7), the four steel balls (73) just fall into the four positions (53) of the four slide grooves, so that the printing platform (5) can move along the transverse slide groove and along the longitudinal slide groove.

7. The fully automatic multi-combination printer set according to claim 2, characterized in that: The feed track (4) is provided with a feed motor (42) and a feed proximity switch (41), wherein the feed proximity switch (41) is installed on the rear side of the track switching mechanism (7) on one side of line A, and the feed motor (42) is installed on a frame below the starting end of the feed track (4).

8. A fully automatic multi-combination printer set according to claims 1-7, characterized in that: The unit printer group is provided with a control component, and the control component comprises: A PLC industrial control module, used for receiving a working signal of each unit printer group and sending a first control signal and a second control signal based on the working signal, wherein the first control signal is a motor start signal and the second control signal is a proximity switch interlock signal; The main control module is installed on the printer head mainboard and is used to control the printer nozzle, X-axis, Y-axis, Z-axis and ink cartridge negative pressure system; A feeding proximity switch (21), used for receiving a first control signal to start a feeding motor (25) and receiving a second control signal to lock and shut down a previous feeding motor (25); A feed proximity switch (41), interlocked with the feed proximity switch (21), for receiving a first control signal to start the feed motor (42) and receiving a second control signal to stop the feed motor (25); The replenishing fixture proximity switch (101) is interlocked with the feed proximity switch (41), and is used to receive a first control signal to start the replenishing motor (102) and the fixture opening and closing motor (112), and receive a second control signal to turn off the feed motor (42); The printer head proximity switch (61) is interlocked with the position-filling and clamp proximity switch (101), and is used to receive a first control signal to start a printing mode and receive a second control signal to turn off the position-filling motor (102) and the clamp opening and closing motor (112); after printing is completed, the printing mode is turned off and the position-filling motor (102) and the clamp opening and closing motor (112) are turned on again; The material discharging proximity switch (81) is interlocked with the position-filling fixture proximity switch (101), and is used to receive a first control signal and start the material discharging motor (82), and receive a second control signal and turn off the position-filling motor (102) and the fixture opening and closing motor (112); A material return proximity switch (31) is interlocked with a material discharge proximity switch (81) and is used to receive a first control signal to start a material return motor (32) and receive a second control signal to stop a material discharge motor (82); The communication module is used to receive external signals, including signals sent by the PLC industrial control module and signals sent by the main control module; The power module is used to supply power to the PLC industrial control module.

9. A fully automatic multi-combination printer set according to claim 8, characterized in that: The sensing signals of the proximity sensor (51) and the proximity switches of each unit printer group are transmitted to the PLC industrial control module for processing via wired or wireless means, and the PLC industrial control modules of each unit printer group transmit signals via the communication module.

10. A fully automatic multi-combination printer set according to any one of claim 9, characterized in that: The starting end of the A line is provided with a loading station TA, through which materials are continuously fed to the printer group manually, and the terminal end of the B line is provided with a unloading station TB, through which the returned materials are packaged and recycled manually.

Images