Double-sided printing machine and double-sided printing machine alignment method

Abstract

The invention relates to the field of printing machines, and in particular to a double-sided printing machine, comprising a synchronous gear box, a first printing roller, a second printing roller, and an adjustment mechanism, wherein the synchronous gear box comprises a first output shaft end and a second output shaft end, and the first output shaft end is drivingly connected to the first printing roller; the adjustment mechanism comprises a connecting plate, an axle seat, a worm, a worm gear sleeve, and a bearing, wherein the worm gear sleeve is sleeved outside the second output shaft end, and a bearing is provided between the worm gear sleeve and the second output shaft end to realize a rotatable connection, the connecting plate is arranged on the second output shaft end and can rotate together with the second output shaft end, the axle seat is arranged on the connecting plate, the worm is arranged on the axle seat, the worm is meshed with the worm gear sleeve, the worm gear sleeve is drivingly connected to the second printing roller, and the worm gear sleeve is rotated around an axis by rotating the worm, so as to change the angular relative position of the worm gear sleeve and the second output shaft end, thereby changing the corresponding position of a printing pattern on the first printing roller and a printing pattern on the second printing roller.

Description

Technical Field

[0001] The invention relates to the field of printing machines, in particular to a double-sided printing machine and a method for aligning patterns of the double-sided printing machine. Background Art

[0002] Most fabrics are currently printed on one side, and the utilization rate of fabrics printed on one side is low. To improve the utilization rate, the same pattern can only be printed on both sides of the fabric. When printing on both sides, the position, shape, size and distribution of the patterns on both sides of the fabric need to be completely aligned, otherwise the patterns on both sides will be misaligned, which will reduce the aesthetic effect of the fabric. With the development of double-sided printing, for some products that need to be printed on both sides, the patterns on both sides need to be consistent. At present, double-sided printing will have cumulative expansion and contraction errors during the continuous printing process, which can easily cause the problem of uncontrollable printing misalignment. Summary of the invention

[0003] In order to overcome the deficiencies in the prior art, the present invention provides a double-sided printing machine with a pattern alignment function and a pattern alignment method for the double-sided printing machine.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a double-sided printing machine, comprising a synchronous gear box, a first printing roller, a second printing roller, and an adjustment mechanism, the synchronous gear box comprising a first output shaft end and a second output shaft end, the first output shaft end rotates synchronously with the second output shaft end, and the first output shaft end is drivingly connected to the first printing roller;

[0005] The adjustment mechanism includes a connecting plate, a shaft seat, a worm, a worm gear sleeve, and a bearing. The worm gear sleeve is sleeved on the outside of the second output shaft end, and a bearing is provided between the worm gear sleeve and the second output shaft end to achieve a rotatable connection. The connecting plate is arranged on the second output shaft end and can rotate together with the second output shaft end. The shaft seat is arranged on the connecting plate, the worm is arranged on the shaft seat, the worm is meshed with the worm gear sleeve, and the worm gear sleeve is transmission-connected to the second printing roller. The worm gear sleeve is rotated around the axis by rotating the worm to change the angular relative position of the worm gear sleeve and the second output shaft end, thereby changing the corresponding position of the printing pattern on the first printing roller and the printing pattern on the second printing roller.

[0006] Furthermore, a positioning hole is provided on the shaft seat, and a positioning bolt is provided in the positioning hole, and the worm is positioned by pressing the locking bolt against the worm.

[0007] Furthermore, it also includes a scale wheel, which is arranged at one end of the worm and at one side of the shaft seat. The scale wheel can rotate with the worm and has scale numbers on it.

[0008] Furthermore, it also includes a hand wheel, which is arranged at one end of the scale wheel and can drive the worm to rotate.

[0009] Furthermore, there are two shaft seats, two scale wheels, and two hand wheels. The worm runs through the two shaft seats, and the two scale wheels are arranged at both ends of the worm. The two hand wheels are respectively arranged on the two scale wheels, and the scale numbers on the two scale wheels are in opposite directions.

[0010] Furthermore, it also includes a plurality of universal transmission shafts, the first output shaft end is drivingly connected to the first printing roller through a universal transmission shaft, the worm gear sleeve is drivingly connected to a universal transmission shaft and to the second printing roller.

[0011] Furthermore, it also includes a lateral adjustment mechanism, a telescopic part is provided on the universal transmission shaft, and the lateral adjustment mechanism includes a screw, a fixed sleeve, and a limit block. The fixed sleeve is arranged on the shaft end of the second printing roller, the upper end of the limit block is sleeved on the screw, and the lower end of the limit block is embedded in the fixed sleeve. The screw is rotated to drive the limit block to move laterally, and the second printing roller is driven to move laterally along the axial direction by relying on the telescopic part, thereby changing the relative position of the second printing roller and the first printing roller.

[0012] Furthermore, it also includes a transfer roller, which is arranged between the first printing roller and the second printing roller.

[0013] Furthermore, a protruding connecting boss is provided on one side of the worm gear sleeve, and the universal transmission shaft is drivingly connected to the connecting boss.

[0014] A method for aligning patterns of a double-sided printing machine, wherein a first output shaft end and a second output shaft end operate synchronously, the first output shaft end is connected to a first printing roller by transmission, and the second output shaft end is connected to a second printing roller by transmission; the method is characterized in that:

[0015] Circumferential adjustment method:

[0016] A1. In the shutdown state, the first output shaft end and the second output shaft end remain stationary;

[0017] A2. Loosen the positioning bolts and turn the worm to make it rotate around its own axis. Since the worm is meshed with the worm gear sleeve, the rotation of the worm can drive the worm gear sleeve to rotate around the axis, changing the relative angle between the worm gear sleeve and the second output shaft end. At the same time, the second printing roller rotates around the axis to adjust the second printing roller to the printing pattern on the first printing roller in a corresponding state in the circumferential position.

[0018] A3. Tighten the positioning bolt;

[0019] Horizontal adjustment method:

[0020] B1. In the shutdown state, the first output shaft end and the second output shaft end remain stationary, and the adjustment mechanism is in a locked state;

[0021] B2. Rotate the screw. Since the limit block on the screw and the fixed sleeve on the shaft end of the second printing roller are embedded in each other, and since the telescopic part of the universal joint shaft can be freely extended and retracted, the rotation of the screw can drive the limit block to move laterally and then drive the second printing roller to move back and forth laterally within the telescopic range of the telescopic part, so as to adjust the second printing roller to a corresponding state in the lateral position with the printing patterns on the first printing roller.

[0022] It can be seen from the above description of the present invention that, compared with the prior art, the present invention provides a double-sided printing machine and a double-sided printing machine alignment method, wherein the purpose of setting a synchronous gear box is to synchronously drive the first printing roller and the second printing roller to rotate synchronously, so that the cloth can be double-sided printed between the first printing roller and the second printing roller;

[0023] The function of setting the adjustment mechanism is to mesh the worm with the worm gear sleeve so that the worm gear sleeve can be driven to rotate by adjusting the rotation of the worm gear to change the relative angle between the worm gear sleeve and the second output shaft end, and then the second printing roller is driven to rotate by the rotation of the worm gear sleeve, so that the printing pattern of the second printing roller is in a corresponding position with the printing pattern of the first printing roller;

[0024] The purpose of providing the positioning hole and the positioning bolt is to lock the positioning bolt in the positioning hole and press against the worm to position the worm, so that the worm and the worm wheel sleeve can be in a locked state;

[0025] The purpose of setting the scale wheel is to accurately adjust the angle of the worm through the scale numbers. Since the scale wheels are set on both sides of the worm, and the scale numbers on both sides face opposite directions, and the adjustment mechanism rotates together with the second output shaft end, the worm can have one side for observing the scale numbers when it stays at any angle;

[0026] The purpose of setting up a universal transmission shaft is to connect the output shaft end to the printing roller through the universal transmission shaft, so that the adjustment performance of the printing roller is better, and by setting a lateral adjustment mechanism to cooperate with the universal transmission shaft, because the universal transmission shaft has a telescopic part that can be telescopically arranged, the lateral adjustment mechanism can drive the second printing roller to move laterally to adjust the relative positions of the printing patterns of the second printing roller and the first printing roller in the lateral direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a schematic structural diagram of a double-sided printing machine.

[0028] Figure 2 The present invention is a partial cross-sectional structural schematic diagram of a double-sided printing machine.

[0029] Figure 3 It is an enlarged schematic diagram of the structure at point A in the figure of the present invention.

[0030] Figure 4It is an enlarged schematic diagram of the structure at B in the figure of the present invention.

[0031] Figure 5 It is a schematic diagram of the structure of the adjustment mechanism of the present invention.

[0032] Figure 6 It is a schematic diagram of the side structure of the adjustment mechanism of the present invention.

[0033] Figure 7 It is a half-section structural schematic diagram of the adjustment mechanism of the present invention.

[0034] Figure 8 It is a schematic diagram of the separation of the adjustment mechanism structure of the present invention.

[0035] The symbols in the figure correspond to the following: 1. synchronous gearbox, 11. first output shaft end, 12. second output shaft end, 13. third output shaft end, 2. first printing roller, 3. second printing roller, 4. transfer roller, 51. connecting plate, 52. shaft seat, 521. positioning hole, 522. positioning bolt, 53. worm, 531. scale wheel, 532. handwheel, 54. turbine casing, 541. connecting boss, 55. bearing, 6. universal transmission shaft, 61. telescopic part, 7. lateral adjustment mechanism, 71. screw, 72. fixing sleeve, 73. limit block. DETAILED DESCRIPTION

[0036] The present invention is further described below through specific implementation modes.

[0037] Reference Figures 1 to 8 The double-sided printing machine shown comprises a synchronous gear box 1, a first printing roller 2, a second printing roller 3, and an adjustment mechanism.

[0038] The synchronous gearbox 1 includes a first output shaft end 11 and a second output shaft end 12. The first output shaft end 11 rotates synchronously with the second output shaft end 12. The first output shaft end 11 is connected to the first printing roller 2 through a universal transmission shaft 6, and the second output shaft end 12 is connected to the second printing roller 3 through a universal transmission shaft 6.

[0039] The adjustment mechanism includes a connecting plate 51, a shaft seat 52, a worm 53, a worm gear sleeve 54, and a bearing 55. The worm gear sleeve 54 is sleeved on the outside of the second output shaft end 12, and a bearing 55 is provided between the worm gear sleeve 54 and the second output shaft end 12 to achieve a rotatable connection. The connecting plate 51 is provided on the second output shaft end 12 and can rotate together with the second output shaft end 12. The shaft seat 52 is provided on the connecting plate 51, and the worm 53 is provided on the shaft seat 52. The worm 53 is meshed with the worm gear sleeve 54, and the worm gear sleeve 54 is transmission-connected to the second printing roller 3. The worm gear sleeve 54 is rotated around the axis by rotating the worm 53 to change the angular relative position of the worm gear sleeve 54 and the second output shaft end 12, thereby changing the corresponding position of the printing pattern on the first printing roller 2 and the printing pattern on the second printing roller 3.

[0040] A positioning hole 521 is provided on the shaft seat 52, and a positioning bolt 522 is provided in the positioning hole 521. The locking bolt is used to press against the worm 53 to position the worm 53, so that the worm 53 and the worm gear sleeve 54 can be in a locked state, thereby preventing the worm 53 from continuing to rotate due to the rotation of the second output shaft end 12, changing the relative angular position of the worm gear sleeve 54 and the second output shaft end 12, thereby affecting the adjustment effect.

[0041] A scale wheel 531 is provided at one end of the worm 53 and at one side of the shaft seat 52. The scale wheel 531 can rotate with the worm 53. The scale wheel 531 is provided with scale numbers. A hand wheel 532 is provided at one end of the scale wheel 531. The hand wheel 532 can drive the worm 53 to rotate. The shaft seat 52 is provided with two scale wheels 531 and two hand wheels 532. The worm 53 penetrates the two shaft seats 52, and the two scale wheels 531 are provided at At both ends of the worm 53, two hand wheels 532 are respectively arranged on two scale wheels 531, and the scale numbers on the two scale wheels 531 are facing opposite directions; the purpose of setting the scale wheel 531 is to accurately adjust the angle of the worm 53 through the scale numbers. Since scale wheels 531 are arranged on both sides of the worm 53, and the scale numbers on both sides are facing opposite directions, and the adjustment mechanism makes it rotate together with the second output shaft end 12, the worm 53 can have one side for observing the scale numbers when it stays at any angle.

[0042] The first output shaft end 11 is connected to the first printing roller 2 through a universal transmission shaft 6, the worm gear sleeve 54 is connected to the universal transmission shaft 6 and connected to the second printing roller 3, one side of the worm gear sleeve 54 is provided with a protruding connection boss 541, and the universal transmission shaft 6 is connected to the connection boss 541; the universal transmission shaft 6 is a structure with a telescopic portion 61 that can be telescopically arranged in the middle and universal joints at both ends; the lateral adjustment mechanism 7 includes a screw 71, a fixed sleeve 72, and a limit block 73, the fixed sleeve 72 is arranged on the shaft end of the second printing roller 3, the upper end of the limit block 73 is sleeved on the screw 71, and the lower end of the limit block 73 is embedded in the fixed sleeve 72, the screw 71 is rotated to drive the limit block 73 to move horizontally, and the second printing roller 3 is driven to move horizontally along the axis direction by relying on the telescopic portion 61, thereby changing the relative position of the second printing roller 3 and the first printing roller 2, so as to change the relative position of the printing patterns of the second printing roller 3 and the first printing roller 2 in the horizontal direction.

[0043] The transfer roller 4 is arranged between the first printing roller 2 and the second printing roller 3, and the transfer roller 4 is similarly connected to the universal transmission shaft 6 by setting a third output shaft end 13 and can be transmission-connected on the transfer roller 4. Transferring through the transfer roller 4 can make the printing pattern clearer.

[0044] The working principle of this double-sided printing machine is as follows:

[0045] Under normal working conditions, the first output shaft end 11 and the second output shaft end 12 run synchronously, the first output shaft end 11 is connected to the first printing roller 2 through the universal transmission shaft 6, the second output shaft end 12 is connected to the second printing roller 3 through the universal transmission shaft 6, and the adjustment structure is arranged on the second output shaft end 12, which can rotate with the second output shaft end 12, and the cloth is printed on both sides between the first printing roller 2 and the second printing roller 3;

[0046] Due to long-term use, the first printing roller 2 and the second printing roller 3 have different directions of misalignment and errors in the printing patterns. There are two adjustment methods:

[0047] Circumferential adjustment method:

[0048] A1. In the shutdown state, the first output shaft end 11 and the second output shaft end 12 remain stationary;

[0049] A2. Loosen the positioning bolt 522, turn the hand wheel 532 to drive the worm 53 to rotate so that the worm 53 rotates around its own axis. Since the worm 53 is meshed with the worm gear sleeve 54, the rotation of the worm 53 can drive the worm gear sleeve 54 to rotate around the axis, changing the angular relative position of the worm gear sleeve 54 and the second output shaft end 12. At the same time, the second printing roller 3 rotates around the axis to adjust the second printing roller 3 to the printing pattern on the first printing roller 2 in the circumferential position in a corresponding state;

[0050] A3. Tighten the positioning bolt 522 to lock the worm 53 and the worm gear sleeve 54 to prevent the worm 53 from rotating again, thereby affecting the adjustment effect;

[0051] Horizontal adjustment method:

[0052] B1. In the shutdown state, the first output shaft end 11 and the second output shaft end 12 remain stationary, and the adjustment mechanism is in a locked state;

[0053] B2. Rotate the screw 71. Since the limit block 73 on the screw 71 and the fixed sleeve 72 on the shaft end of the second printing roller 3 are embedded with each other, and since the telescopic portion 61 of the universal joint 6 can be freely telescopic, the rotation of the screw 71 can drive the limit block 73 to move laterally and then drive the second printing roller 3 to move back and forth laterally within the telescopic range of the telescopic portion 61, so as to adjust the second printing roller 3 and the printing patterns on the first printing roller 2 to be in a corresponding state in the lateral position.

[0054] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A double-sided printing machine, characterized in that: It includes a synchronous gear box, a first printing roller, a second printing roller, and an adjustment mechanism. The synchronous gear box includes a first output shaft end and a second output shaft end. The first output shaft end rotates synchronously with the second output shaft end. The first output shaft end is drivingly connected to the first printing roller. The adjusting mechanism comprises a connecting plate, an axle seat, a worm, a worm gear sleeve, and a bearing. The worm gear sleeve is sleeved on the outside of the second output shaft end, and a bearing is provided between the worm gear sleeve and the second output shaft end to realize a rotatable connection. The connecting plate is provided on the second output shaft end and can rotate together with the second output shaft end. The axle seat is provided on the connecting plate, the worm is provided on the axle seat, the worm is meshed with the worm gear sleeve, and the worm gear sleeve is transmission-connected with the second printing roller. The worm gear sleeve is rotated around the axis by rotating the worm gear to change the angular relative position of the worm gear sleeve and the second output shaft end, thereby changing the corresponding position of the printing pattern on the first printing roller and the printing pattern on the second printing roller. It also includes several universal transmission shafts, the first output shaft end is connected to the first printing roller through a universal transmission shaft, the worm gear sleeve is connected to the universal transmission shaft and the second printing roller; it also includes a lateral adjustment mechanism, the universal transmission shaft is provided with a telescopic part, the lateral adjustment mechanism includes a screw, a fixed sleeve, and a limit block, the fixed sleeve is arranged on the shaft end of the second printing roller, the upper end of the limit block is sleeved on the screw, and the lower end of the limit block is embedded in the fixed sleeve, the screw is rotated to drive the limit block to move laterally, and the second printing roller is driven to move laterally along the axial direction by relying on the telescopic part, thereby changing the relative position of the second printing roller and the first printing roller.

2. A double-sided printing machine according to claim 1, characterized in that: The shaft seat is provided with a positioning hole, and a positioning bolt is arranged in the positioning hole. The worm is pressed against the worm by the locking bolt to position the worm.

3. A double-sided printing machine according to claim 1, characterized in that: It also includes a scale wheel, which is arranged at one end of the worm and at one side of the shaft seat. The scale wheel can rotate with the worm and has scale numbers on it.

4. A double-sided printing machine according to claim 3, characterized in that: It also includes a hand wheel, which is arranged at one end of the scale wheel and can drive the worm to rotate.

5. A double-sided printing machine according to claim 4, characterized in that: There are two shaft seats, two scale wheels and two hand wheels. The worm runs through the two shaft seats, and the two scale wheels are arranged at both ends of the worm. The two hand wheels are respectively arranged on the two scale wheels, and the scale numbers on the two scale wheels face opposite directions.

6. A double-sided printing machine according to claim 1, characterized in that: It also includes a transfer roller, which is arranged between the first printing roller and the second printing roller.

7. A double-sided printing machine according to claim 1, characterized in that: A protruding connecting boss is provided on one side of the worm gear sleeve, and the universal transmission shaft is drivingly connected to the connecting boss.

8. A method for aligning patterns of a double-sided printing machine, wherein the first output shaft end and the second output shaft end operate synchronously, the first output shaft end is connected to the first printing roller by transmission, and the second output shaft end is connected to the second printing roller by transmission; characterized in that: include Circumferential adjustment method: A1. In the shutdown state, the first output shaft end and the second output shaft end remain stationary; A2. Loosen the positioning bolts and rotate the worm to make it rotate around its own axis. Since the worm is meshed with the worm gear sleeve, the rotation of the worm can drive the worm gear sleeve to rotate around the axis, changing the angular relative position between the worm gear sleeve and the second output shaft end. At the same time, the second printing roller rotates around the axis to adjust the second printing roller to the printing pattern on the first printing roller in a corresponding state in the circumferential position. A3. Tighten the positioning bolt; Horizontal adjustment method: B1. In the shutdown state, the first output shaft end and the second output shaft end remain unconnected, and the adjustment mechanism is in a locked state; B2. Rotate the screw. Since the limit block on the screw and the fixed sleeve on the shaft end of the second printing roller are embedded in each other, and since the telescopic part of the universal joint shaft can be freely extended and retracted, the rotation of the screw can drive the limit block to move laterally and then drive the second printing roller to move back and forth laterally within the telescopic range of the telescopic part, so as to adjust the second printing roller to a corresponding state in the lateral position with the printing patterns on the first printing roller.

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