Sliding device for rotary screen printing

Abstract

The utility model discloses a sliding device for rotary screen printing. The sliding device comprises a sliding table and a driving mechanism, wherein the sliding table and the driving mechanism are erected on a rack; the driving mechanism comprises a first motor, a second motor, a first transmission shaft and a second transmission shaft; the first transmission shaft and the second transmission shaft are arranged in parallel; the first motor is installed on the rack and is in transmission connection with the first transmission shaft, the second motor is in transmission connection with the second transmission shaft, and the first transmission shaft is in transmission connection with the second transmission shaft through a second synchronous belt wheel assembly. According to the sliding device for rotary screen printing, a driving structure and a control method of the rotary screen printing unit during intermittent motion of the guide belt are innovated; when the guide belt runs, the rotary screen printing unit is jointly driven by the first motor and the second motor to do reciprocating translational motion; when the guide belt is static, the second motor drives the second synchronous belt to drive the sliding table to move, the linear speed of the guide belt moving relative to the sliding table is consistent with the linear speed of the rotary screen, and therefore the continuity of rotary screen printing is guaranteed.

Description

Technical Field

[0001] The utility model relates to dyeing and finishing equipment, in particular to a sliding device for rotary screen printing. Background Art

[0002] The existing digital printing machine adopts an intermittent feeding and printing working mode: the fabric is conveyed to the digital printing station through a guide belt, and the print head scans and prints. After printing is completed, the fabric moves forward by a step distance and then stops, and then the print head scans and prints again. Intermittent printing is carried out cyclically in this way. When printing complex patterns, the base fabric to be printed needs to be subjected to rotary screen printing and digital printing respectively. However, rotary screen printing adopts a continuous feeding and continuous printing mode. How to ensure the printing accuracy of the base fabric to be printed and make the patterns coherent has become a difficult problem in the industry.

[0003] The specification of Chinese Patent Application No. 202211356611.0 discloses a printing machine and its control method, which includes a controller, a frame, and a conveyor belt arranged along the length direction of the frame. At least one rotary screen printing component and an intermittent printing component are arranged on the frame; the rotary screen printing component includes a rolling printing piece and a first driving component for driving the rolling printing piece to reciprocate along the length direction of the frame; the intermittent printing component can perform intermittent printing on the base fabric to be printed. This printing machine adopts intermittent operation of the guide belt, and the first driving component drives the rotary screen to move back and forth on the guide belt, so that the intermittent printing component and the rotary screen printing can cooperate on the same production line, making the patterns coherent. The printing process during the conveyor belt transportation includes that when the conveyor belt transports the base fabric to be printed to move, the rolling printing piece continues to move at 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 when the rolling printing piece rotates is V2, and V1 is equal to V2, that is, the rolling printing piece 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 precision of the motor and the mechanical mechanism. Once the working conditions change, such as the change of the magnetic force of the printing magnetic table, the wear of the mechanical transmission mechanism, or the change of the glue thickness on the guide belt, there is a time difference at the moment of the forward and reverse rotation of the first linear motor driving the guide belt to translate, and the parameters cannot be changed in time, so the above equation cannot be satisfied, resulting in imprints that do not meet the printing requirements on the fabric surface by the rotary screen, affecting the printing quality, and even causing the rotary screen to twist or break.

[0004] In view of the defects of the prior art, it is necessary to improve the driving structure of the rotary screen printing unit during the intermittent movement of the guide belt to ensure the printing effect. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a sliding device for rotary screen printing.

[0006] The technical solution for achieving the purpose of the present utility model is: a sliding device for rotary screen printing, which includes a sliding table mounted on a frame and a driving mechanism for driving the sliding table 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 and the second transmission shaft are arranged in parallel, and the axial direction of the first transmission shaft is perpendicular to the running direction of the fabric; the first motor is installed on the frame, the first motor and the first transmission shaft are connected by a first synchronous pulley assembly in transmission, 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 fixedly sleeved on the first transmission shaft; the second motor is installed on the sliding table, the second motor is in transmission connection with the second transmission shaft, and the first transmission shaft and the second transmission shaft are connected by a second synchronous pulley assembly in transmission, the second synchronous pulley assembly includes a third synchronous pulley, a fourth synchronous pulley and a fifth synchronous pulley arranged in a triangular pattern, the third synchronous pulley and the fifth synchronous pulley are on the same horizontal line, a second synchronous belt is commonly sleeved on the third synchronous pulley, the fourth synchronous pulley and the fifth synchronous pulley, the fourth synchronous pulley is fixedly sleeved on the second transmission shaft, and the third synchronous pulley is fixedly sleeved on the first transmission shaft; the first motor and the second motor are respectively in communication connection with a control system.

[0007] Further, the sliding table 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, first slide rails are respectively installed on the frame on both sides of the running direction of the fabric, and each first slider is slidably connected to the first slide rail on the same side as the first slider, and a cross beam is installed between the two fixed seats; a second synchronous pulley assembly is installed on each fixed seat, 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 volume of the rotary screen printing unit is small, the two fixed seats share the first transmission shaft and the second transmission shaft, and the structure is more compact.

[0008] Further, the cross beam is installed on the sliding table in a liftable manner through a lifting mechanism.

[0009] Further, 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 perpendicular 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 and is fixed to the fixed seat. The piston rod of the lifting cylinder is fixedly connected to the lifting seat. Both ends of the cross beam are fixedly connected to the lifting seat.

[0010] The sliding device for rotary screen printing implemented by the present utility model innovates the drive structure and operation mode of the rotary screen printing unit during the intermittent movement of the guide belt: 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 table to move. The linear speed of the guide belt is consistent with the linear speed of the first synchronous belt. The linear speed of the second synchronous belt is consistent with the linear speed of the rotary screen. Thus, it is ensured that there is always no speed difference between the rotary screen and the guide belt, and further the coherence of rotary screen printing is ensured. When the guide belt is stationary, the second motor drives the second synchronous belt to drive the slide table to move. The linear speed of the relative movement of the guide belt with respect to the slide table is consistent with the linear speed of the rotary screen. Thus, it is ensured that there is always no speed difference between the rotary screen and the guide belt, and further the coherence of rotary screen printing is ensured. In the present utility model, the linear speed of the self-rotation of the rotary screen is independent of the speed of the guide belt. The linear speed of the self-rotation of the rotary screen 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 and only needs to be consistent with the speed of the main motor. Its operation is simple, the moving position of the rotary screen is accurate, the equipment runs stably, it is not easy to twist the screen, and it can adapt to complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the sliding device according to an embodiment of the present utility model

[0012] Figure 2 is a schematic structural diagram of the drive mechanism according to an embodiment of the present utility model;

[0013] Figure 3 is a schematic structural diagram of the sliding device, rotary screen and guide belt according to an embodiment of the present utility model.

[0014] Among them, the arrow represents the movement direction of the fabric. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following will describe in detail the preferred embodiments of the present utility model with reference to the accompanying drawings.

[0016] As Figures 1 to 3As shown, a sliding device for rotary screen printing comprises a slide 1 mounted on a frame 10 and a driving mechanism 2 for driving the slide 1 to reciprocate in the running direction of the fabric; the slide 1 comprises two fixed seats 11, the two fixed seats 11 are respectively located on both sides of the running direction of the fabric, a first slider 12 is installed on the fixed seat 11, first slide rails 13 are respectively installed on the frame 10 on both sides of the running direction of the fabric, each first slider 12 is slidably connected to the first slide rail 13 on the same side of the first slider 12, and two cross beams 14 are installed between the two fixed seats 11.

[0017] The driving mechanism 2 includes a first motor 21, a second motor 22, a first transmission shaft 23 and a second transmission shaft 24, the first transmission shaft 23 and the second transmission shaft 24 are arranged in parallel, and the axial direction of the first transmission shaft 23 is perpendicular to the running direction of the fabric; the first motor 21 is installed on the frame 10 on either side of the running direction of the fabric, the first motor 21 and the first transmission shaft 23 are connected by a first synchronous pulley assembly 25, the first synchronous pulley assembly 25 includes a first synchronous belt 251, a first synchronous pulley 252 and a second synchronous pulley 253, the first synchronous pulley 252 is installed at the output end of the first motor 21, and the second synchronous pulley 253 is fixed on the first transmission shaft 23; a second synchronous pulley assembly 26 is installed on each of the fixed seats 11, and the second synchronous pulley assembly 26 includes a third synchronous pulley 261, a fourth synchronous pulley 262 arranged in a triangle, and a The third synchronous pulley 261 and the fifth synchronous pulley 263 are located on the same horizontal line, and the third synchronous pulley 261, the fourth synchronous pulley 262 and the fifth synchronous pulley 263 are collectively provided with a second synchronous belt 264, the fourth synchronous pulley 262 is sleeved on the second transmission shaft 24, the third synchronous pulley 261 is sleeved on the first transmission shaft 23, and the fifth synchronous pulley 263 is sleeved on the frame 10; the second motor 22 is installed on the fixed seat 11 on either side of the running direction of the fabric, and the second motor 22 is transmission-connected to the second transmission shaft 24.

[0018] Further, the cross beam 14 is installed on the sliding table 11 in a liftable manner through a lifting mechanism 3; the lifting mechanism 3 includes a lifting seat 31 and a lifting cylinder 32. A second slide rail 33 is installed on the fixed seat 11. The second slide rail 33 is perpendicular to the first slide rail 13. The lifting seat 31 is slidably connected to the second slide rail 33 through a second slider 34. The lifting cylinder 32 is located below the lifting seat 31. The lifting cylinder 32 is fixed on the fixed seat 11. The piston rod of the lifting cylinder 32 is fixedly connected to the lifting seat 31. Both ends of the cross beam 14 are respectively fixed on the lifting seat 31.

[0019] During use, as Figure 1 and Figure 3 shown, each screen 201 of the rotary screen printing unit 20 is respectively installed on the corresponding cross beam 14; a guide belt 30 is installed on the machine frame 10. The guide belt 30 is driven to operate by a main drive device 40. The main drive device 40 includes a main motor (not shown); the first motor 21, the second motor 22, a screen motor (not shown) that drives the screen 201 to rotate, and the main motor are respectively in communication connection with a control system (not shown).

[0020] When only the rotary screen printing unit 20 needs to print alone, the guide belt 30 runs at a constant speed, and the sliding device does not operate. When the rotary screen printing unit 20 prints, the screen 201 is fixed on the screen seat of the cross beam 14. The lifting mechanism 3 drives the cross beam 14 to descend, so that the screen 201 contacts the guide belt 30. A screen motor is installed inside the cross beam 14 to drive the screen 201 to rotate. At this time, the linear speed of the screen 201 is consistent with the speed of the guide belt; when the rotary screen printing unit 20 stops working, the lifting mechanism 3 drives the cross beam 14 to rise, and the screen 201 is separated from the guide belt 30.

[0021] When screen sizing or digital printing unit overprinting is required, the guide belt 30 moves intermittently. At this time, the control method for driving the linear movement of the rotary screen printing unit by the driving mechanism includes:

[0022] 1) When the guide belt 1 is running, the first motor 21 and the second motor 22 are started simultaneously. The rotation direction of the second transmission shaft 24 is opposite to that of the rotary screen 201, and the rotational speed of the second motor 22 is limited by the linear speed of the second synchronous belt 264 being consistent with the linear speed of the rotary screen 201. The first motor 21 receives the signal fed back by the main transmission device to drive the first transmission shaft 23 to rotate, so that the linear speed of the first synchronous belt 251 is consistent with the linear speed of the guide belt 30. The rotation direction of the first transmission shaft 23 is opposite to that of the second transmission shaft 24. The first transmission shaft 23 drives the second synchronous pulley assembly 26 to operate, thereby pulling the sliding table 1 to run in the same direction as the guide belt 30. Thus, it is ensured that there is always no speed difference between the rotary screen and the guide belt, and further the coherence of rotary screen printing is ensured.

[0023] 2) When the guide belt 1 stops moving, the first motor 21 does not work, and the second motor 22 is started to drive the second synchronous pulley assembly 26 to operate. The rotation direction of the second transmission shaft 24 is the same as that 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 264. Thus, it is ensured that there is always no speed difference between the rotary screen and the guide belt, and further the coherence of rotary screen printing is ensured.

[0024] The structure of the driving mechanism of the present utility model is not limited to that shown in the embodiment. The fixed seats on each side can be driven by a set of driving mechanisms respectively, or two fixed seats can share a set of driving mechanisms. When the sliding device for rotary screen printing is small in volume, 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 provided only on one side in the running direction of the fabric, but when the second synchronous pulley assemblies are provided on both sides, the stability of the system operation is higher. The lifting structure of the cross beam is not limited to that shown in the embodiment, and can also be other lifting structures in the mechanical field. The structure of the sliding table is also not limited to that shown in the embodiment. The cross beam and the fixed seat can also be integrally formed. In the structure of this embodiment, the cross beam and the fixed seat are separated, and the cross beam can be lifted. In this way, when the rotary screen printing unit does not work, it can be lifted to prevent a large amount of slurry from remaining on the guide belt when the rotary screen touches the guide belt, and since the guide belt has glue, the rotary screen may be stuck and cause the problem of screen breakage. The number of cross beams of the present utility model is not limited, and the specific number can be set according to production needs.

[0025] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent process transformation made by using the content of the specification of the present utility model, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present utility model by the same token.

Claims

1. A slip device for rotary screen printing, characterized in that: It includes a slide mounted on a frame 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 in parallel with the second transmission shaft, and the axial direction of the first transmission shaft is perpendicular to the running direction of the fabric; the first motor is installed on the frame, the first motor and the first transmission shaft are connected 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 pulley is installed at the output end of the first motor, and the second synchronous pulley is fixed on the first transmission shaft; the The second motor is installed on the slide, the second motor is connected to the second transmission shaft, 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 and the second motor are respectively connected to the control system for communication.

2. The slip device for rotary screen printing according to claim 1, characterized in that: The slide table 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 first slide rails are respectively installed on the frames on both sides of the running direction of the fabric, 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; each of the fixed seats 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.

3. The slip device for rotary screen printing according to claim 2, wherein: The crossbeam is installed on the slide platform in a liftable manner through a lift mechanism.

4. The slip device for rotary screen printing according to claim 3, wherein: 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.

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