A combined printing machine

Abstract

The present invention discloses a combined printing machine, which includes a rotary screen printing unit, which is installed on a frame through a sliding device, and the sliding device includes a slide and a driving mechanism; the driving mechanism includes a first motor, a second motor, a first transmission shaft and a second transmission shaft, and the first transmission shaft is arranged in parallel with the second transmission shaft; the first motor is installed on the frame and is connected to the first transmission shaft in transmission, the second motor is connected to the second transmission shaft in transmission, and the first transmission shaft is connected to the second rotating shaft through a second synchronous pulley assembly. The combined printing machine of the present invention innovates the driving structure and control method of the rotary screen printing unit when the guide belt is intermittently moving: when the guide belt is running, the reciprocating translation movement of the rotary screen printing unit is driven by the first motor and the second motor; when the guide belt is stationary, the second motor drives the second synchronous belt to drive the slide to move, and the linear speed of the guide belt relative to the slide is consistent with the linear speed of the rotary screen, thereby ensuring the continuity of the rotary screen printing.

Description

Technical Field

[0001] The invention relates to dyeing and finishing equipment, in particular to a combined printing machine. Background Art

[0002] The existing digital printing machine adopts the intermittent feeding and printing working mode: the fabric is transported to the digital printing station through the guide belt, and the print head scans and prints. After printing, the fabric moves forward a step and stops, and then the print head scans and prints again, and intermittent printing is performed in this way. When it is necessary to print complex patterns, the base fabric to be printed needs to be subjected to rotary screen printing and digital printing respectively, but the rotary screen printing adopts the mode of continuous feeding and continuous printing. How to ensure the printing accuracy of the base fabric to be printed while making the pattern coherent has become a difficult problem in the industry.

[0003] The specification of Chinese patent application No. 202211356611.0 discloses a printing machine and a control method thereof, which includes a controller, a frame, and a conveyor belt arranged along the length of the frame, and the frame is provided with at least one rotary screen printing component and an intermittent printing component; the rotary screen printing component includes a roller printing part and a first driving component driving the roller printing part to reciprocate along the length of the frame; the intermittent printing component can intermittently print the substrate to be printed. The printing machine adopts intermittent operation of the guide belt, and uses the first driving component to drive the rotary screen to move back and forth on the guide belt, so that the intermittent printing component can work together with the rotary screen printing on the same production line, so that the pattern has continuity. The printing process during conveyor belt conveying includes: when the conveyor belt conveys and moves the base fabric to be printed, the roller printing part continues to move along the speed when the base fabric to be printed does not move, the slider of the first linear motor moves in the direction away from the flat screen printing component, and the moving speed of the slider of the first linear motor is less than the moving speed of the base fabric to be printed; the difference between the moving speed of the slider of the first linear motor and the moving speed of the base fabric to be printed is V1, and the moving speed of the roller printing part when rotating is V2, V1 is equal to V2, that is, the roller printing part still prints the base fabric to be printed at the speed when the base fabric to be printed does not move. The defect of this structure is that the guide belt runs intermittently, and the speed is not uniform, but constantly changing, which requires very high motor accuracy and mechanical mechanism accuracy. Once the working conditions change, such as the magnetic force of the printing magnetic table changes, the mechanical transmission mechanism wears, or the thickness of the guide belt glue changes, there is a time difference in the forward and reverse rotation of the first linear motor driving the guide belt to translate, and the parameters cannot be changed in time, and the above equation cannot be satisfied, resulting in the appearance of non-printing requirements on the surface of the fabric by the round screen, affecting the printing quality, and even causing the round screen to twist and break.

[0004] In view of the defects of the prior art, it is necessary to improve the continuous printing process of the combined equipment of the rotary screen and the intermittent printing unit to ensure the printing effect. Summary of the invention

[0005] The object of the present invention is to provide a combined printing machine.

[0006] The technical solution for achieving the purpose of the present invention is: a combined printing machine, which includes a guide belt installed on a frame, the guide belt is driven to run by a main transmission device, the main transmission device includes a main motor, and a rotary screen printing unit and an intermittent printing unit are installed above the guide belt at intervals along the running direction of the fabric; the rotary screen printing unit includes a rotatable rotary screen, and the rotary screen printing unit is movably installed on the frame through a sliding device, and the sliding device includes a slide and a driving mechanism for driving the slide to reciprocate in the running direction of the fabric; the driving mechanism includes a first motor, a second motor, a first transmission shaft and a second transmission shaft, the first transmission shaft is arranged parallel to the second transmission shaft, and the axial direction of the first transmission shaft is parallel to the axial direction of the rotary screen; the first motor is installed on the frame, and the first motor and the first transmission shaft are connected in transmission through a first synchronous pulley assembly, the first synchronous pulley assembly includes a first synchronous belt, a first synchronous pulley and a second synchronous pulley, the first synchronous belt, a first synchronous pulley and a second synchronous pulley, A synchronous pulley is installed at the output end of the first motor, and the second synchronous pulley is fixed on the first transmission shaft; the second motor is installed on the slide, the second motor is connected to the second transmission shaft, and the first transmission shaft and the second transmission shaft are connected through a second synchronous pulley assembly, the second synchronous pulley assembly includes a third synchronous pulley, a fourth synchronous pulley and a fifth synchronous pulley arranged in a triangle, the third synchronous pulley and the fifth synchronous pulley are located on the same horizontal line, the third synchronous pulley, the fourth synchronous pulley and the fifth synchronous pulley are collectively sleeved with a second synchronous belt, the fourth synchronous pulley is fixed on the second transmission shaft, and the third synchronous pulley is fixed on the first transmission shaft; the first motor, the second motor, the round screen motor driving the round screen to rotate and the main motor are respectively connected to the control system in communication; further, when the guide belt moves intermittently, the control method for the driving mechanism to drive the round screen printing unit to move linearly includes:

[0007] 1) When the guide belt is running, the first motor and the second motor are started at the same time, the direction of the second transmission shaft is opposite to the direction of the round screen, and the second motor drives the linear speed of the second synchronous belt to be consistent with the linear speed of the round screen; the first motor receives the signal fed back by the main transmission device to drive the first transmission shaft to rotate, so that the linear speed of the first synchronous belt is consistent with the linear speed of the guide belt, the direction of the first transmission shaft is the same as the direction of the second transmission shaft, and the first transmission shaft drives the second synchronous belt wheel assembly to operate, thereby pulling the slide to run in the same direction as the guide belt;

[0008] 2) When the guide belt stops moving, the first motor does not work, the second motor starts to drive the second synchronous belt pulley assembly to operate, the direction of the second transmission shaft is opposite to the direction of the rotary screen, and the linear speed of the rotary screen is consistent with the linear speed of the second synchronous belt.

[0009] Furthermore, the slide includes two fixed seats, the two fixed seats are respectively located on both sides of the running direction of the fabric, a first slider is installed on the fixed seat, and a first slide rail is installed on the frame on both sides of the running direction of the fabric, each first slider is slidably connected to the first slide rail on the same side of the first slider, a crossbeam is installed between the two fixed seats, and the round net is installed on the crossbeam; each fixed seat is installed with a second synchronous pulley assembly, the two third synchronous pulleys are respectively installed at both ends of the first transmission shaft, and the two fourth synchronous pulleys are respectively installed at both ends of the second transmission shaft. When the combined printing machine is small in size, the two fixed seats share the first transmission shaft and the second transmission shaft, and the structure is more compact.

[0010] Furthermore, the crossbeam is liftably mounted on the slide platform via a lifting mechanism.

[0011] Furthermore, the lifting mechanism includes a lifting seat and a lifting cylinder, a second slide rail is installed on the fixed seat, the second slide rail is vertically arranged to the first slide rail, the lifting seat is slidably connected to the second slide rail through a second slider, the lifting cylinder is located below the lifting seat, the lifting cylinder is fixed on the fixed seat, the piston rod of the lifting cylinder is fixedly connected to the lifting seat, and the two ends of the crossbeam are respectively fixed on the lifting seat.

[0012] Furthermore, a plurality of rotary screen printing units are sequentially installed on the slide along the running direction of the fabric.

[0013] The combined printing machine realized by the present invention innovates the driving structure and operation mode of the rotary screen printing unit when the guide belt moves intermittently: when the guide belt is running, the reciprocating translational movement of the rotary screen printing unit is jointly driven by the first motor and the second motor, the synchronous belt connection has high mechanical precision, the first motor drives the slide to move, the linear speed of the guide belt is consistent with the linear speed of the first synchronous belt, and the linear speed of the second synchronous belt is consistent with the linear speed of the rotary screen, thereby ensuring that there is no speed difference between the rotary screen and the guide belt, thereby ensuring the continuity of the rotary screen printing; when the guide belt is stationary, the second motor drives the second synchronous belt to drive the slide to move, and the linear speed of the guide belt relative to the slide is consistent with the linear speed of the rotary screen, thereby ensuring that there is no speed difference between the rotary screen and the guide belt, thereby ensuring the continuity of the rotary screen printing. In the present invention, the linear speed of the rotary screen rotation is independent of the speed of the guide belt. The linear speed of the rotary screen rotation only needs to be consistent with the linear speed of the second synchronous belt. At the same time, the moving speed of the rotary screen printing unit is provided by the encoder signal of the main motor driving the guide belt. It only needs to be consistent with the speed of the main motor. The operation is simple, the rotary screen moves accurately, the equipment runs stably, the screen is not easy to twist, and it can adapt to complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of a combined printing machine according to an embodiment of the present invention;

[0015] Figure 2 It is a structural schematic diagram of the rotary screen printing unit according to an embodiment of the present invention;

[0016] Figure 3 It is a schematic diagram of the structure of the driving mechanism described in an embodiment of the present invention.

[0017] The arrows represent the direction of movement of the fabric. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0019] like Figure 1 to Figure 3 As shown, a combined printing machine includes a guide belt 1 installed on a frame 10, the guide belt 1 is driven by a main transmission device 2, the main transmission device 2 includes a main motor (not shown), two rotary screen printing units 20 and an intermittent printing unit 30 are sequentially installed above the guide belt 1 along the running direction of the fabric (not shown); the rotary screen printing unit includes a rotatable rotary screen 201, and the rotary screen printing unit 20 is movably installed on the frame 10 through a sliding device 3.

[0020] The sliding device 3 includes a slide 31 and a driving mechanism 32 for driving the slide 31 to reciprocate in the running direction of the fabric; the slide 31 includes two fixed seats 311, the two fixed seats 311 are respectively located on both sides of the running direction of the fabric, a first slider 312 is installed on the fixed seat 311, and a first slide rail 313 is respectively installed on the frame 10 on both sides of the running direction of the fabric, each first slider 312 is slidably connected to the first slide rail 313 on the same side of the first slider 312, two beams 314 are installed between the two fixed seats 311, and each of the round nets 201 is partially installed on the corresponding beam 314.

[0021] The driving mechanism 32 includes a first motor 321, a second motor 322, a first transmission shaft 323 and a second transmission shaft 324, wherein the first transmission shaft 323 is arranged in parallel with the second transmission shaft 324, and the axial direction of the first transmission shaft 323 is parallel to the axial direction of the round net 201; the first motor 321 is installed on the frame 10 on either side of the running direction of the fabric, the first motor 321 and the first transmission shaft 323 are connected by a first synchronous pulley assembly 325, the first synchronous pulley assembly 325 includes a first synchronous belt 3251, a first synchronous pulley 3252 and a second synchronous pulley 3253, the first synchronous pulley 3252 is installed at the output end of the first motor 321, and the second synchronous pulley 3253 is sleeved on the first transmission shaft 323; each of the fixing seats 311 is installed with a second synchronous pulley assembly 326, and the second synchronous pulley assembly 326 The invention comprises a third synchronous pulley 3261, a fourth synchronous pulley 3262 and a fifth synchronous pulley 3263 arranged in a triangle, wherein the third synchronous pulley 3261 and the fifth synchronous pulley 3263 are located on the same horizontal line, and the third synchronous pulley 3261, the fourth synchronous pulley 3262 and the fifth synchronous pulley 3263 are collectively provided with a second synchronous belt 3264, the fourth synchronous pulley 3262 is sleeved on the second transmission shaft 324, the third synchronous pulley 3261 is sleeved on the first transmission shaft 323, and the fifth synchronous pulley 3263 is sleeved on the frame 10; the second motor 322 is installed on the fixing seat 311 on either side of the running direction of the fabric, the second motor 322 is connected to the second transmission shaft 324 in transmission, the first motor 321, the second motor 322, and the rotary net 201 are driven by the first motor 321, the second motor 322, and the rotary net 201 are driven by the first motor 321, the second motor 322, and the rotary net 201. The rotating cylinder motor (not shown) and the main motor are respectively connected to the control system (not shown).

[0022] Further, the crossbeam 314 is escalably mounted on the slide 311 via a lifting mechanism 33; the lifting mechanism 33 includes a lifting seat 331 and a lifting cylinder 332, a second slide rail 333 is mounted on the fixed seat 311, the second slide rail 333 is vertically arranged with the first slide rail 313, the lifting seat 331 is slidably connected with the second slide rail 333 via a second slider 334, the lifting cylinder 332 is located below the lifting seat 331, the lifting cylinder 332 is fixed on the fixed seat 311, the piston rod of the lifting cylinder 332 is fixedly connected with the lifting seat 331, and both ends of the crossbeam 314 are respectively fixed on the lifting seat 331.

[0023] The intermittent printing unit described in the present invention can be a digital printing unit or a flat screen printing unit, which is common knowledge in the field of printing equipment and will not be elaborated here; the rotary screen printing unit is located before the intermittent printing unit, and can print the fabric alone, or sizing the fabric to form a slurry layer on the surface of the fabric, so that the digital printing ink can fully penetrate into the fabric, thereby improving the printing effect and quality of digital printing, and can also be combined with the intermittent printing unit for overprinting, which not only improves the printing speed, but also greatly saves ink, thereby reducing the printing cost.

[0024] When only the rotary screen printing unit 20 is needed to print alone, the guide belt 1 is in a uniform motion state, the sliding device 3 is not running, and when the rotary screen printing unit 20 is printing, the rotary screen 201 is fixed on the mesh seat of the crossbeam 314, and the lifting mechanism 33 drives the crossbeam 314 to descend, so that the rotary screen 201 contacts the guide belt 1, and a rotary screen motor is installed inside the crossbeam 314 to drive the rotary screen 201 to rotate. At this time, the linear speed of the rotary screen 201 is consistent with the guide belt speed; when the rotary screen printing unit 20 stops working, the lifting mechanism 33 drives the crossbeam 314 to rise, and the rotary screen 201 and the guide belt 1 are separated.

[0025] When the rotary screen sizing or digital printing unit overprinting is required, the guide belt 1 is in intermittent motion. At this time, the control method of the driving mechanism driving the rotary screen printing unit to move linearly includes:

[0026] 1) When the guide belt 1 is running, the first motor 321 and the second motor 322 are started at the same time, the direction of the second transmission shaft 324 is opposite to that of the rotary screen 201, and the rotation speed of the second motor 322 is limited to the linear speed of the second synchronous belt 3264 being consistent with the linear speed of the rotary screen 201; the first motor 321 receives the signal fed back by the main transmission device to drive the first transmission shaft 323 to rotate, so that the linear speed of the first synchronous belt 3251 is consistent with the linear speed of the guide belt 1, the direction of the first transmission shaft 323 is the same as that of the second transmission shaft 324, and the first transmission shaft 323 drives the second synchronous belt wheel assembly 326 to operate and then pulls the slide 31 to run in the same direction as the guide belt; thereby ensuring that there is no speed difference between the rotary screen and the guide belt, thereby ensuring the continuity of rotary screen printing.

[0027] 2) When the guide belt 1 stops moving, the first motor 321 does not work, the second motor 322 starts to drive the second synchronous pulley assembly 326 to operate, the direction of the second transmission shaft 324 is opposite to the direction of the rotary screen 201, and the linear speed of the rotary screen 201 is consistent with the linear speed of the second synchronous belt 3264; thereby ensuring that there is no speed difference between the rotary screen and the guide belt, thereby ensuring the continuity of rotary screen printing.

[0028] The structure of the driving mechanism described in the present invention is not limited to that shown in the embodiment. The fixed seat on each side can be driven by a set of driving mechanisms respectively, or the two fixed seats can share a set of driving mechanisms. When the combined printing machine is small in size, the two fixed seats share the first transmission shaft and the second transmission shaft, and the structure is more compact; the second synchronous pulley assembly can also be arranged only on one side of the running direction of the fabric, but the second synchronous pulley assembly is arranged on both sides at the same time, and the stability of the system operation is higher; the lifting structure of the beam is not limited to that shown in the embodiment, and it can also be other lifting structures in the mechanical field; the structure of the slide is also not limited to that shown in the embodiment, and the beam and the fixed seat can also be integrally formed. In the structure of this embodiment, the beam is separated from the fixed seat, and the beam can be lifted and lowered, so that the round screen printing unit can be lifted when it is not working, to prevent the round screen from sticking to the guide belt, which will leave a large amount of slurry, and the guide belt has glue, the round screen may be stuck and cause the screen to break; the number of round screen printing units described in the present invention is not limited, and the specific number can be set according to production needs.

[0029] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent process changes made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A combined printing machine, comprising a guide belt mounted on a frame, the guide belt being driven by a main transmission device, the main transmission device comprising a main motor, a rotary screen printing unit and an intermittent printing unit being installed at intervals above the guide belt along the running direction of the fabric; the rotary screen printing unit comprising a rotatable rotary screen, the rotary screen printing unit being movably mounted on the frame through a sliding device, characterized in that: The sliding device includes a slide and a driving mechanism that drives the slide to reciprocate in the running direction of the fabric; the driving mechanism includes a first motor, a second motor, a first transmission shaft and a second transmission shaft, the first transmission shaft is arranged in parallel with the second transmission shaft, and the axial direction of the first transmission shaft is parallel to the axial direction of the round net; the first motor is installed on the frame, and the first motor and the first transmission shaft are connected by a first synchronous pulley assembly, the first synchronous pulley assembly includes a first synchronous belt, a first synchronous pulley and a second synchronous pulley, the first synchronous pulley is installed at the output end of the first motor, and the second synchronous pulley is fixed on the first transmission shaft; the second motor is installed at the output end of the first motor, and the second synchronous pulley is fixed on the first transmission shaft. On the slide, the second motor is connected to the second transmission shaft, and the first transmission shaft and the second transmission shaft are connected via a second synchronous pulley assembly, the second synchronous pulley assembly includes a third synchronous pulley, a fourth synchronous pulley and a fifth synchronous pulley arranged in a triangle, the third synchronous pulley and the fifth synchronous pulley are located on the same horizontal line, the third synchronous pulley, the fourth synchronous pulley and the fifth synchronous pulley are collectively sleeved with a second synchronous belt, the fourth synchronous pulley is fixed on the second transmission shaft, and the third synchronous pulley is fixed on the first transmission shaft; the first motor, the second motor, the round net motor for driving the round net to rotate, and the main motor are respectively connected to the control system for communication.

2. The combined printing machine according to claim 1, characterized in that: When the guide belt moves intermittently, the control method of the driving mechanism driving the rotary screen printing unit to move linearly includes: 1) When the guide belt is running, the first motor and the second motor are started at the same time, the direction of the second transmission shaft is opposite to the direction of the round screen, and the second motor drives the linear speed of the second synchronous belt to be consistent with the linear speed of the round screen; the first motor receives the signal fed back by the main transmission device to drive the first transmission shaft to rotate, so that the linear speed of the first synchronous belt is consistent with the linear speed of the guide belt, the direction of the first transmission shaft is the same as the direction of the second transmission shaft, and the first transmission shaft drives the second synchronous belt wheel assembly to operate, thereby pulling the slide to run in the same direction as the guide belt; 2) When the guide belt stops moving, the first motor does not work, the second motor starts to drive the second synchronous belt pulley assembly to operate, the direction of the second transmission shaft is opposite to the direction of the rotary screen, and the linear speed of the rotary screen is consistent with the linear speed of the second synchronous belt.

3. The combined printing machine according to claim 2, characterized in that: The slide table includes two fixed seats, and the two fixed seats are respectively located on both sides of the running direction of the fabric, and a first slider is installed on the fixed seat, and first slide rails are respectively installed on the frames on both sides of the running direction of the fabric, and each of the first sliders is slidably connected to the first slide rail on the same side of the first slider, and a crossbeam is installed between the two fixed seats, and the round net is installed on the crossbeam; a second synchronous pulley assembly is installed on each of the fixed seats, and the two third synchronous pulleys are respectively installed at both ends of the first transmission shaft, and the two fourth synchronous pulleys are respectively installed at both ends of the second transmission shaft.

4. The combined printing machine according to claim 3, characterized in that: The crossbeam is installed on the slide platform in a liftable manner through a lift mechanism.

5. The combined printing machine according to claim 4, characterized in that: The lifting mechanism includes a lifting seat and a lifting cylinder. A second slide rail is installed on the fixed seat. The second slide rail is vertically arranged with the first slide rail. The lifting seat is slidably connected with the second slide rail via a second slider. The lifting cylinder is located below the lifting seat. The lifting cylinder is fixed on the fixed seat. The piston rod of the lifting cylinder is fixedly connected with the lifting seat. Both ends of the crossbeam are respectively fixed on the lifting seat.

6. The combined printing machine according to claim 1, characterized in that: A plurality of rotary screen printing units are sequentially mounted on the slide along the running direction of the fabric.

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