A double-sided spray letter jet printer

Abstract

This invention relates to a double-sided inkjet printing machine, comprising a flip-plate system, a first printing system, and a second printing system. The flip-plate system is disposed between the first and second printing systems. The printing substrate has a first printing surface and a second printing surface, which are respectively located on the top and bottom surfaces of the printing substrate. During operation, the printing substrate first enters the first printing system, where it is printed on the first printing surface. Then, the printing substrate enters the flip-plate system, where it is flipped. Finally, the printing substrate enters the second printing system, where it is printed on the second printing surface, thus completing the overall printing process.

Description

Technical Field

[0001] This invention relates to a text inkjet printer, and more particularly to a text inkjet printer capable of double-sided printing on a printing substrate. Background Technology

[0002] As is well known, a text inkjet printer is a device used to print text or patterns on the surface of various materials. Its working principle is to spray ink directly onto the substrate in the form of tiny droplets through a printhead, forming the desired text or pattern. Text inkjet printers are widely used in many fields, including the marking and labeling of electronic products such as PCB boards and FPC boards.

[0003] In essence, the working principle of a text inkjet printer is that nozzles inside its printhead eject ink in the form of tiny droplets. By controlling the opening and closing of the nozzles, the desired text or pattern can be formed on the substrate. This technology gives text inkjet printers high precision and high resolution, enabling them to print very fine patterns and text.

[0004] Text inkjet printers are particularly useful in the coating of PCBs and FPCs. Printing text and patterns on PCBs allows for the identification and marking of different parts of the circuit board. Marking and labeling can also be performed on flexible circuit boards to meet specific user needs.

[0005] However, traditional inkjet printers generally only have the function of spraying on one side of the substrate. If double-sided spraying is required, manual flipping is required, which is inefficient and the spraying quality cannot be guaranteed. Summary of the Invention

[0006] The technical solution adopted in this invention is as follows: a double-sided inkjet printing machine, comprising a flip-plate system, a first inkjet system, and a second inkjet system. The flip-plate system is disposed between the first inkjet system and the second inkjet system. The printing substrate has a first inkjet surface and a second inkjet surface, which are respectively located on the top and bottom surfaces of the printing substrate. During operation, the printing substrate first enters the first inkjet system, where the first inkjet system performs an inkjet action on the first inkjet surface of the printing substrate. Then, the printing substrate enters the flip-plate system, where the flip-plate system performs a flip-plate action on the printing substrate. Finally, the printing substrate enters the second inkjet system, where the second inkjet system performs an inkjet action on the second inkjet surface of the printing substrate, thereby completing the overall inkjet printing operation.

[0007] The beneficial effects of this invention are as follows: During operation, the printing substrate first enters the first printing system, where it is printed on the first printing surface. Then, the substrate enters the flip-plate system, where it is flipped. Finally, the substrate enters the second printing system, where it is printed on the second printing surface, thus completing the overall printing process. This printing machine features a high degree of automation and a simple, reliable structure. Attached Figure Description

[0008] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0009] Figure 2 This is a schematic diagram of the flip-plate system of the present invention.

[0010] Figure 3 This is a schematic diagram of the working operation of the flip-plate system of the present invention.

[0011] Figure 4 This is a three-dimensional schematic diagram of the first and second inkjet printing systems of the present invention.

[0012] Figure 5 This is a schematic diagram of the operation of the first and second inkjet printing systems of the present invention.

[0013] Figure 6 This is a schematic diagram of the principle of the flipping table, the upper support system, and the lower support system of the present invention.

[0014] Figure 7 This is a schematic diagram of the operation of the tilting table of the present invention.

[0015] Figure 8 This is a cross-sectional structural diagram of the upper and lower support systems of the present invention.

[0016] Figure 9 This is a schematic diagram illustrating the principle of the inwardly curved, wrapped, and fixed structure of the present invention.

[0017] Figure 10 This is a schematic diagram of the internal bending aid of the present invention.

[0018] Figure 11 This is a schematic diagram of another embodiment of the receiving system of the present invention. Detailed Implementation

[0019] like Figures 1 to 11 As shown, a double-sided inkjet printing machine includes a flip-plate system 100, a first inkjet system 200 and a second inkjet system 300, wherein the flip-plate system 100 is disposed between the first inkjet system 200 and the second inkjet system 300.

[0020] The printing substrate A has a first printing surface A1 and a second printing surface A2, wherein the first printing surface A1 and the second printing surface A2 are located at the top and bottom surfaces of the printing substrate A, respectively.

[0021] The substrate A is a PCB board.

[0022] like Figure 3 As shown, during operation, the substrate A first enters the first printing system 200, where the first printing system 200 performs a printing action on the first printing surface A1 of the substrate A. Then, the substrate A enters the flipping system 100, where the flipping system 100 flips the substrate A. Finally, the substrate A enters the second printing system 300, where the second printing system 300 performs a printing action on the second printing surface A2 of the substrate A, thus completing the overall printing operation.

[0023] In specific implementation, the first printing system 200 includes a first printing table 210, a first embedded conveyor belt 220 and a first printing system 230, wherein the first embedded conveyor belt 220 is disposed in the first printing table 210 and the first printing system 230 is disposed above the first printing table 210.

[0024] The first printing station 210 is provided with a first conveyor belt groove 211 and several first suction cups 212. The first embedded conveyor belt 220 is disposed in the first conveyor belt groove 211. The top of the first embedded conveyor belt 220 has a first conveying surface 221. The tops of the several first suction cups 212 are simultaneously located on the first suction surface 213.

[0025] like Figure 5 As shown, the first printing system 200 has a first conveying and feeding state and a first adsorption and spraying state. When the first printing system 200 is in the first conveying and feeding state, the first conveying surface 221 is higher than the first adsorption surface 213. At this time, the second printing surface A2 of the printing substrate A is in contact with the first conveying surface 221, and the first embedded conveyor belt 220 drives the printing substrate A to move back and forth on the first printing table 210.

[0026] When the first printing system 200 is in the first adsorption spraying state, the first transmission surface 221 is lower than the first adsorption surface 213. At this time, the second printing surface A2 of the substrate A is adsorbed and fixed on the first adsorption surface 213, and the first printing system 230 performs printing on the first printing surface A1 of the substrate A.

[0027] In practice, the spatial position of the first transmission surface 221 is fixed. The spatial position of the first adsorption surface 213 is adjusted by the up-and-down extension and retraction of several first suction cups 212 on the first printing table 210. When the first printing system 200 is in the first transmission feeding state, the first transmission surface 221 is higher than the first adsorption surface 213. When the first printing system 200 is in the adsorption spraying state, the first transmission surface 221 is lower than the first adsorption surface 213.

[0028] In practical implementation, the first inkjet printing system 230 includes a moving track section and a printhead. The printhead is located at the bottom of the moving track section. The technical content of the first inkjet printing system 230 belongs to the prior art and will not be described in detail here.

[0029] In specific implementation, the second printing system 300 includes a second printing table 310, a second embedded conveyor belt 320, and a second printing system 330. The second embedded conveyor belt 320 is disposed in the second printing table 310, and the second printing system 330 is disposed above the second printing table 310. The second printing table 310 is provided with a second conveyor belt groove 311 and several second suction cups 312. The second embedded conveyor belt 320 is disposed in the second conveyor belt groove 311. The top of the second embedded conveyor belt 320 has a second conveying surface 321, and the tops of the several second suction cups 312 are simultaneously located on the second suction surface 313.

[0030] like Figure 5 As shown, the second printing system 300 has a second conveying and feeding state and a second adsorption and spraying state. When the second printing system 300 is in the second conveying and feeding state, the second conveying surface 321 is higher than the second adsorption surface 313. At this time, the first printing surface A1 of the substrate A is in contact with the second conveying surface 321, and the second embedded conveyor belt 320 drives the substrate A to move back and forth on the second printing table 310.

[0031] When the second printing system 300 is in the second adsorption spraying state, the second transmission surface 321 is lower than the second adsorption surface 313. At this time, the first printing surface A1 of the substrate A is adsorbed and fixed on the second adsorption surface 313, and the second printing system 330 performs printing on the second printing surface A2 of the substrate A.

[0032] In practice, the spatial position of the second transmission surface 321 is fixed. The spatial position of the second adsorption surface 313 is adjusted by the vertical extension and retraction of several second suction cups 312 on the second printing table 310. When the second printing system 300 is in the second transmission feeding state, the second transmission surface 321 is higher than the second adsorption surface 313. When the second printing system 300 is in the second adsorption spraying state, the second transmission surface 321 is lower than the second adsorption surface 313.

[0033] In practical implementation, the second printing system 330 includes a moving track section and a printhead. The printhead is located at the bottom of the moving track section. The technical content of the second printing system 330 is prior art and will not be described in detail here.

[0034] The present invention, through the structural design of the first printing system 200 and the second printing system 300, facilitates the transmission of the printing substrate A and the fixation of its position during the printing action, and the overall structure can improve work efficiency.

[0035] The flip-plate system 100 includes a flip table 400, a flip motor, an upper support system 600, and a lower support system 700. The motor output shaft 500 of the flip motor is connected to the flip table 400, and the upper support system 600 and the lower support system 700 are disposed in the flip table 400.

[0036] like Figure 6 As shown, the tilting table 400 has an inlet / outlet 410 and a functional cavity 420, wherein the inlet / outlet 410 is connected to the cavity 420 of the tilting table, and the inlet / outlet 410 is located at one end of the tilting table 400.

[0037] The functional cavity 420 is located between the upper receiving system 600 and the lower receiving system 700, wherein the upper receiving system 600 is located above the functional cavity 420 and the lower receiving system 700 is located below the functional cavity 420.

[0038] like Figure 7 As shown, the flip-plate system 100 has a feeding state, a flipping state, and a discharging state. When the flip-plate system 100 is in the feeding state, the feeding and discharging port 410 corresponds to the first embedded conveyor belt 220 of the first inkjet printing system 200. The first embedded conveyor belt 220 transports the printing substrate A, which has completed the inkjet printing action on the first inkjet printing surface A1, through the feeding and discharging port 410 to the functional cavity 420.

[0039] When the flipping system 100 is in the flipped state, the upper receiving system 600 and the lower receiving system 700 fix the printing substrate A in the functional cavity 420. The flipping motor drives the flipping table 400 to flip, so that the inlet and outlet 410 corresponds to the second embedded conveyor belt 320 of the second inkjet system 300.

[0040] When the flip-plate system 100 is in the discharge state, the upper receiving system 600 and the lower receiving system 700 push the printing substrate A through the inlet / outlet 410 onto the second embedded conveyor belt 320 of the second inkjet printing system 300. The second embedded conveyor belt 320 transports the printing substrate A to the second inkjet printing system 330, where inkjet printing is performed on the second inkjet printing surface A2 of the printing substrate A.

[0041] like Figure 8 As shown, in a specific implementation, the upper support system 600 includes several upper pulleys 611 and an upper belt 612. The upper belt 612 is wound around the several upper pulleys 611. The upper belt 612 includes an inclined functional surface 610, a retaining rib 620, and a deformable inner cavity 630. The upper belt 612 has an inner side surface 640 and an outer end side surface 650. The inner side surface 640 is pressed onto the several upper pulleys 611. The inclined functional surface 610 is inclinedly connected between the inner side surface 640 and the outer end side surface 650. The retaining rib 620 protrudes from the inner side surface 640. Each upper pulley 611 has a rib groove 621. The retaining rib 620 is engaged in the rib groove 621. The deformable inner cavity 630 is disposed in the upper belt 612.

[0042] The lower receiving system 700 includes a plurality of lower pulleys 711 and a lower belt 712. The lower belt 712 is wound around the plurality of lower pulleys 711. The lower belt 712 has an inner side 710 and an outer side 720, wherein the inner side 710 is pressed against the plurality of lower pulleys 711.

[0043] The inclined functional surface 610 of the upper belt 612 and the outer side surface 720 of the lower belt 712 surround and form the functional cavity 420 of the tilting table 400.

[0044] When the printing substrate A is located in the functional cavity 420, that is, when the flipping system 100 is in the feeding state, the flipping state, and the discharging state, the two sides of the second printing surface A2 of the printing substrate A are pressed against the outer side surface 720 of the lower belt 712, and the top edges A3 of the two sides of the first printing surface A1 of the printing substrate A are pressed against the upper extrusion area 613 of the inclined functional surface 610 of the upper belt 612. In this state, the upper belt 612 forms an inwardly curved wrapping and fixing structure.

[0045] like Figure 9 As shown, the inner bend wrapping and fixing structure includes a belt top fixing portion 810, a belt bottom fixing portion 820, and a belt inner bend portion 830. The belt top fixing portion 810 is formed at the position where the rib 620 of the upper belt 612 engages with the rib groove 621 of the upper pulley 611. The belt bottom fixing portion 820 is formed at the position where the top edges A3 on both sides of the printing body A abut against the upper compression area 613 of the upper belt 612. The belt inner bend portion 830 is formed at the position between the inclined functional surface 610 of the upper belt 612 and the deformable inner cavity 630. The belt inner bend portion 830 is located between the belt top fixing portion 810 and the belt bottom fixing portion 820.

[0046] When the printing substrate A is located in the functional cavity 420, the top edges A3 on both sides of the printing substrate A push against the upper belt 612, causing the upper belt 612 to undergo physical deformation. The inner bending portion 830 of the belt bends toward the deformed cavity 630, and the outer end side 650 of the upper belt 612 bends toward the printing substrate A, thus forming the inner bending wrapping and fixing structure of the upper belt 612.

[0047] The inward-curved wrapping and fixing structure can wrap around both sides of the printing substrate A, and the inward-curved wrapping and fixing structure will not contact the first printing surface A1 of the printing substrate A, so as to avoid the upper belt 612 scratching the coating on the first printing surface A1. At the same time, the inward-curved wrapping and fixing structure can increase the contact area between the upper belt 612 and the printing substrate A. When the printing substrate A is located in the functional cavity 420, the flipping system 100 can stably complete the feeding state, the flipping state, and the discharging state.

[0048] like Figure 10 As shown, in a specific implementation, the upper support system 600 also includes an inner bending auxiliary device 660. The inner bending auxiliary device 660 includes a cylinder 661, a pull rod 662, and a pressure head 663. The cylinder 661 is located on the top of the tilting table 400, the pull rod 662 is connected to the power output shaft of the cylinder 661, and the pressure head 663 is located at the bottom of the pull rod 662. The pressure head 663 corresponds to the outer end side 650 of the upper belt 612. When the upper belt 612 forms the inner bending wrapping and fixing structure, the cylinder 661 causes the pressure head 663 to squeeze the outer end side 650 through the pull rod 662, thereby improving the bending efficiency of the inner bending wrapping and fixing structure.

[0049] like Figure 11 As shown, in specific implementation, the upper support system 600 can also adopt other structures.

Claims

1. A double-sided inkjet printing machine for text, characterized in that: The system includes a flip-plate system, a first printing system, and a second printing system. The flip-plate system is positioned between the first and second printing systems. The printing substrate has a first printing surface and a second printing surface, located on its top and bottom surfaces, respectively. During operation, the printing substrate first enters the first printing system, where it is printed on the first printing surface. Then, the substrate enters the flip-plate system, where it is flipped. Finally, the substrate enters the second printing system, where it is printed on the second printing surface, completing the overall printing process. The flip-plate system includes a flipping table, a flipping motor, an upper receiving system, and a lower receiving system. The output shaft of the flipping motor is connected to the flipping table. The upper and lower receiving systems are disposed within the flipping table. The flipping table has an inlet / outlet and a functional cavity. The inlet / outlet is connected to the functional cavity and is located at one end of the flipping table. The functional cavity is located between the upper and lower receiving systems, with the upper receiving system positioned above the functional cavity and the lower receiving system positioned below it. The upper support system includes several upper pulleys and an upper belt. The upper belt is wound around the pulleys and includes an inclined functional surface, a retaining rib, and a deformable inner cavity. The upper belt has an inner side and an outer end side. The inner side is pressed against the pulleys. The inclined functional surface is inclinedly connected between the inner side and the outer end side. The retaining rib protrudes from the inner side. Each pulley has a groove, and the retaining rib engages in the groove. The deformable inner cavity is located within the upper belt. The lower support system includes several lower pulleys and a lower belt. The lower belt is wound around the several lower pulleys and has an inner side and an outer side. The inner side of the belt is pressed against the several lower pulleys. The inclined functional surface of the upper belt and the outer surface of the lower belt surround and form the functional cavity of the tilting table. When the printing substrate is located in the functional cavity, the two sides of the second printing surface of the printing substrate press against the outer surface of the lower belt, and the top edges of the two sides of the first printing surface of the printing substrate abut against the upper compression area of ​​the inclined functional surface of the upper belt. In this state, the upper belt forms an inwardly curved, wrapped, and fixed structure. The inward-curved wrapping and fixing structure includes a belt top fixing portion, a belt bottom fixing portion, and a belt inward-curved portion. The belt top fixing portion is formed where the rib of the upper belt engages with the rib groove of the upper pulley. The belt bottom fixing portion is formed where the top edges of the printing substrate abut against the upper compression area of ​​the upper belt. The belt inward-curved portion is formed between the inclined functional surface of the upper belt and the deformable inner cavity, and is located between the belt top fixing portion and the belt bottom fixing portion. When the printing substrate is located in the functional cavity, the top edges on both sides of the printing substrate push against the upper belt, causing the upper belt to undergo physical deformation. The inner curved portion of the belt bends towards the deformed cavity, and the outer side of the upper belt bends towards the printing substrate, forming the inner curved wrapping and fixing structure.

2. The double-sided inkjet printing machine for text printing as described in claim 1, characterized in that: The first printing system includes a first printing table, a first embedded conveyor belt, and a first printing system, wherein the first embedded conveyor belt is disposed within the first printing table, and the first printing system is disposed above the first printing table. The first printing station is equipped with a first conveyor belt groove and several first suction cups. A first embedded conveyor belt is disposed within the first conveyor belt groove, and its top has a first conveying surface. The tops of the several first suction cups are simultaneously located on the first adsorption surface. The first printing system has a first conveying and feeding state and a first adsorption and spraying state. When the first printing system is in the first conveying and feeding state, the first conveying surface is higher than the first adsorption surface, and the second printing surface of the substrate is in contact with the first conveying surface. The first embedded conveyor belt drives the substrate to move back and forth on the first printing station. When the first printing system is in the first adsorption and spraying state, the first conveying surface is lower than the first adsorption surface, and the second printing surface of the substrate is adsorbed and fixed on the first adsorption surface, allowing the first printing system to perform printing operations on the first printing surface of the substrate. The second printing system includes a second printing table, a second embedded conveyor belt, and a second printing system. The second embedded conveyor belt is disposed within the second printing table, and the second printing system is disposed above the second printing table. The second printing station is provided with a second conveyor belt groove and several second suction cups. The second embedded conveyor belt is disposed in the second conveyor belt groove, and the top of the second embedded conveyor belt has a second conveying surface. The tops of the several second suction cups are simultaneously located on the second adsorption surface. The second printing system has a second conveying feeding state and a second adsorption spraying state. When the second printing system is in the second conveying feeding state, the second conveying surface is higher than the second adsorption surface, and the first printing surface of the substrate is in contact with the second conveying surface. The second embedded conveyor belt drives the substrate to move back and forth on the second printing station. When the second printing system is in the second adsorption spraying state, the second conveying surface is lower than the second adsorption surface, and the first printing surface of the substrate is adsorbed and fixed on the second adsorption surface. The second printing system performs printing on the second printing surface of the substrate.

3. A double-sided inkjet printing machine for text printing as described in claim 2, characterized in that: The spatial position of the first conveying surface is fixed. Several first suction cups move up and down within the first printing station to adjust the spatial position of the first suction surface. This ensures that when the first printing system is in the first conveying and feeding state, the first conveying surface is higher than the first suction surface; and when the first printing system is in the first suction spraying state, the first conveying surface is lower than the first suction surface. The spatial position of the second transmission surface is fixed. The spatial position of the second adsorption surface is adjusted by the up-and-down extension and retraction of several second suction cups on the second printing station. When the second printing system is in the second transmission feeding state, the second transmission surface is higher than the second adsorption surface. When the second printing system is in the second adsorption spraying state, the second transmission surface is lower than the second adsorption surface.

4. A double-sided inkjet printing machine for text printing as described in claim 2, characterized in that: This flip-plate system has feeding, flipping, and discharging states. When the flip-plate system is in the feeding state, the feeding / discharging port corresponds to the first embedded conveyor belt of the first printing system. The first embedded conveyor belt transports the printing substrate, which has completed the printing action on the first printing surface, through the feeding / discharging port into the functional cavity. When the flip-plate system is in the flipped state, the upper and lower receiving systems fix the printing substrate in the functional cavity. The flipping motor drives the flipping table to flip, so that the inlet and outlet ports correspond to the second embedded conveyor belt of the second printing system. When the flip-plate system is in the discharge state, the upper receiving system and the lower receiving system push the printing substrate through the inlet and outlet to the second embedded conveyor belt of the second printing system. The second embedded conveyor belt transports the printing substrate to the second printing system, where printing is performed on the second printing surface of the printing substrate.

5. A double-sided spray-coating text printing machine as described in claim 1, characterized in that: The upper support system also includes an inner bending auxiliary device, which includes a cylinder, a pull rod, and a pressure head. The cylinder is located on the top of the tilting table, the pull rod is connected to the power output shaft of the cylinder, and the pressure head is located at the bottom of the pull rod. The pressure head corresponds to the outer end side of the upper belt. When the upper belt forms the inner bending wrapping and fixing structure, the cylinder causes the pressure head to squeeze the outer end side through the pull rod.

6. A double-sided inkjet printing machine for text printing as described in claim 1, characterized in that: The substrate is a PCB board.

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