A printing device with quickly detachable pressure roller

Abstract

The present invention discloses a printing device with a quickly detachable pressure roller in the technical field of printing machines, comprising a bracket assembly and a flipping mechanism; the bracket assembly comprises a bracket, a driving rod and a driving device, the driving rod and the driving device are both connected to the bracket, the driving rod is connected to the driving device, and drives the driving rod to rotate, gears are arranged at both ends of the driving rod, and the gears are driven to rotate by the driving rod; the bracket comprises a vertical pole and a pressure roller, the pressure roller is movably connected to the vertical pole, and mounting shafts are arranged at both ends of the pressure roller; the flipping mechanism is respectively connected to the driving rod and the pressure roller through gears and mounting shafts, and the flipping mechanism is flipped by the gears. In this printing device with a quickly detachable pressure roller, the pressure roller can be directly removed from the vertical pole through the flipping mechanism, and the pressure roller can be quickly disassembled and installed, thereby improving the replacement efficiency of the pressure roller, thereby indirectly achieving the purpose of improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of printing machines, in particular to a printing device with a quickly detachable pressure roller. Background Art

[0002] A printing press is a machine for printing text and images. A modern printing press is generally composed of mechanisms such as plate loading, inking, embossing, and film feeding. The working principle of the printing press is to make the text and image to be printed into a printing plate, install the printing plate on the drum, apply ink to the ink roller, transfer the ink to the pressure roller through the ink roller, and print on the substrate directly or indirectly.

[0003] When the printing press is in use, the pressure roller needs to be replaced so that different patterns or texts can be printed. The disassembly of the existing printing press is extremely cumbersome, and because the pressure roller needs to rotate, it is generally connected to the bracket supporting the pressure roller through a bearing, and the bearing and the bracket are interference fit. When the pressure roller is disassembled, a great external force is required to remove the bearing from the bracket, which is time-consuming and labor-intensive, greatly affecting the replacement efficiency of the pressure roller, thereby indirectly affecting the production efficiency of printed products. Therefore, how to improve the disassembly efficiency of the pressure roller and indirectly improve the production efficiency of printed products is a problem that needs to be urgently solved by technicians in this technical field. Summary of the invention

[0004] The purpose of the present invention is to provide a printing device with a quickly detachable pressure roller, so as to solve the problem raised in the above-mentioned background technology that since the pressure roller needs to rotate, it is generally connected to the bracket supporting the pressure roller through a bearing, and there is an interference fit between the bearing and the bracket. When the pressure roller is disassembled, a great external force is required to remove the bearing from the bracket, which is time-consuming and labor-intensive, greatly affecting the replacement efficiency of the pressure roller, thereby indirectly affecting the production efficiency of printed products.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a printing device with a quickly detachable pressure roller, comprising a bracket assembly and a flip mechanism;

[0006] The bracket assembly includes a bracket, a driving rod and a driving device, wherein the driving rod and the driving device are both connected to the bracket, the driving rod and the driving device are connected to drive the driving rod to rotate, and gears are arranged at both ends of the driving rod, and the gears are driven to rotate by the driving rod;

[0007] The support comprises a vertical pole and a pressure roller, the pressure roller is movably connected to the vertical pole, and mounting shafts are arranged at both ends of the pressure roller;

[0008] The flipping mechanism is connected to the driving rod and the pressure roller respectively through gears and a mounting shaft, and the flipping mechanism is driven to flip through the gears, and the pressure roller is driven to move out of the inner side of the bracket through the flipping mechanism;

[0009] The turning mechanism comprises:

[0010] A gear ring, which is arranged on the outside of the vertical rod and meshes with the gear;

[0011] A driven ring, the driven ring is arranged on the inner side of the gear ring and meshes with the gear ring, a clamping block is arranged on the side wall of the driven ring, a connecting block is arranged on the inner side of the driven ring, and a mounting hole movably connected to the positioning shaft is opened on the side wall of the connecting block;

[0012] A connecting rod is arranged on the side wall of the gear ring, and a connecting hole connected to the screw rod is opened on the side wall of the connecting rod.

[0013] Preferably, the side wall of the vertical pole is provided with a first pickup block, a second pickup block and a first mounting block, the first pickup block and the second pickup block are diagonally symmetrical, the first mounting block and the second pickup block are on the same side wall, and the first mounting block is at the upper end of the second pickup block;

[0014] A positioning shaft and a first installation frame are arranged on the side of the vertical pole, and the first installation frame is arranged on the upper end of the positioning shaft;

[0015] A guide groove is provided on the side wall of the vertical rod, and a fixing ring is provided in the inner cavity of the guide groove.

[0016] Preferably, the support further comprises:

[0017] A second installation frame, wherein the second installation frame is arranged on a side surface of the vertical pole, a screw rod is arranged on an inner side of the second installation frame, and the screw rod is movably connected to the side surface of the vertical pole;

[0018] A pressure plate is arranged on the inner side of the vertical pole and parallel to the pressure roller. A deviation correction rod is arranged on the side wall of the pressure plate, and a deviation correction groove is opened on the side wall of the deviation correction rod.

[0019] Preferably, the bracket assembly further comprises:

[0020] An ink tank, the ink tank is arranged on the inner side of the vertical rod, the ink tank is arranged obliquely above the pressing roller and parallel to the pressing roller, an ink roller is arranged at the bottom of the ink tank, and the ink roller is in contact with the pressing roller;

[0021] A drive assembly is movably connected to the second installation frame.

[0022] Preferably, the drive assembly comprises:

[0023] A translation mechanism, the translation mechanism is arranged on the second mounting frame and connected to the screw rod, the translation mechanism comprises a slider, an upper mounting plate and a lower mounting plate, a threaded hole is opened at the end of the slider, the slider is arranged on the inner side of the second mounting frame and connected to the screw rod through the threaded hole, the upper mounting plate is arranged on the top of the slider and contacts with the top of the second mounting frame, and the lower mounting plate is arranged on the bottom of the slider and contacts with the bottom of the second mounting frame;

[0024] A driving mechanism, the driving mechanism is connected to the translation mechanism and is detachably connected to the mounting shaft;

[0025] A second mounting block is connected to the translation mechanism and is detachably connected to the mounting shaft.

[0026] Preferably, a film detection mechanism is provided on the top of the support assembly, and the film detection mechanism comprises:

[0027] A first mounting seat, wherein the first mounting seat is disposed obliquely above the bracket assembly through a mounting plate;

[0028] A first upper cover body, wherein the first upper cover body is arranged at the inner upper end of the first mounting seat, a first mounting groove is formed at the top of the inner cavity of the first upper cover body, and a first photosensor is installed inside the first mounting groove;

[0029] A first lower cover body, the first lower cover body is arranged at the inner lower end of the first mounting seat, the first lower cover body corresponds to the first upper cover body but does not contact the first upper cover body, a second mounting groove is formed at the bottom of the inner cavity of the first lower cover body, the second mounting groove corresponds to the first mounting groove, and a first light source is mounted inside the second mounting groove;

[0030] The first guide roller is rectangular and movably installed at the four corners of the inner cavity of the first upper cover body and the first lower cover body.

[0031] Preferably, a printing detection mechanism is provided on the top of the support assembly, and the printing detection mechanism comprises:

[0032] A second mounting seat, the second mounting seat is arranged obliquely above the bracket assembly through a mounting plate;

[0033] A second upper cover body, wherein the second upper cover body is arranged at the inner upper end of the second mounting seat, an upper partition is arranged in the inner cavity of the second upper cover body, a third mounting groove is arranged at the top of the inner cavity of the second upper cover body, and a second photosensor is installed in the inner side of the third mounting groove;

[0034] a second lower cover body, the second lower cover body being arranged at the inner lower end of the second mounting seat, the second lower cover body corresponding to but not in contact with the second upper cover body, the inner cavity of the second lower cover body being provided with a lower partition corresponding to the upper partition, the inner cavity bottom of the second lower cover body being provided with a fourth mounting groove corresponding to the third mounting groove, the inner cavity of the fourth mounting groove being provided with a second light source;

[0035] a second guide roller, the second guide roller being installed in the inner cavities of the second upper cover body and the second lower cover body;

[0036] A third guide roller is installed in the inner cavity of the second upper cover body and the second lower cover body, and the third guide roller is isolated from the second guide roller by the upper partition plate and the lower partition plate.

[0037] Preferably, a control system is provided at the bottom of the inner side wall of the upright pole, and the control system comprises:

[0038] A conversion module, the conversion module being electrically connected to the first photosensor and the second photosensor respectively, and being used for performing analog-to-digital conversion on the collected light intensity data;

[0039] A storage module, the storage module is used to execute storage of set comparison data;

[0040] A calculation module, the calculation module and the conversion module are respectively used to calculate the collected light intensity data and calculate the absolute value of the light intensity difference;

[0041] A processing module, the processing module is electrically connected to the conversion module, the storage module and the calculation module respectively, and is used to compare the collected light intensity data and the calculated absolute value of the light intensity difference with the stored comparison data and output the comparison result;

[0042] A control module is electrically connected to the processing module and is used to receive the comparison result and output different control signals according to the comparison result. The control module is embedded with a communication module for performing data transmission.

[0043] Preferably, the control system includes the following specific operating steps:

[0044] S1: The first photosensor is used to collect the light intensity data after the first light source penetrates the printed film, and the data is output to the processing module; the second photosensor is used to collect the light intensity data after the second light source penetrates the printed film and the pattern printed on the printed film, and the second photosensor inputs the collected light intensity data into the calculation module, and the calculation module calculates the difference between the light intensity data collected by the second photosensor and the light intensity data collected by the first photosensor and inputs the difference into the processing module, and outputs the collected data to the analog-to-digital conversion module for analog-to-digital conversion;

[0045] S2: Comparing the light intensity data collected by the first photosensor with the data stored in the storage module through the processing module, obtaining the data of the thickness of the printed film and outputting it, and comparing the difference with the data stored in the storage module through the processing module, obtaining the data of the thickness of the pigment on the printed pattern and the data of the pigment distribution and outputting them;

[0046] S3: After receiving the comparison result output by the processing module, the control module outputs different control signals according to the comparison result data, and processes the printed film before printing and the product after printing respectively.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] (1) The pressure roller can be directly removed from the vertical pole through the flipping mechanism, and the pressure roller can be quickly disassembled and installed, which improves the replacement efficiency of the pressure roller, thereby indirectly achieving the purpose of improving production efficiency;

[0049] (2) The reverse rotation of the gear ring drives the driven ring to reverse, and the pressure roller is fixed between the two vertical poles. The staff only needs to move the pressure roller, and the pressure roller can be installed quickly, which further improves the replacement efficiency of the pressure roller, thereby indirectly achieving the purpose of improving production efficiency;

[0050] (3) There is a gap between the pressure plate and the driving rod. The printed film passes through the gap between the pressure plate and the driving rod, bypasses the driving rod and passes between the two pressure rollers. The pressure plate is pressed against the driving rod to prevent the edge of the printed film from folding, thereby ensuring the printing quality.

[0051] (4) The printing film passes through the deflection correction groove and is inserted into the gap between the pressing plate and the driving rod. The deflection correction groove limits the lateral displacement of the printing film to prevent the printing film from deflecting, thereby further ensuring the printing quality;

[0052] (5) The light emitted by the first light source passes through the printed film and illuminates the first photosensor. After the light passes through the printed film, the printed film will weaken the intensity of the light. The first photosensor collects the intensity of the light after passing through the printed film to detect the thickness of the printed film and determine whether the printed film is qualified;

[0053] (6) The solidified printed film passes between the upper and lower partitions, and the side of the printed film with the pattern or text contacts the felt. The ink solidification is detected through the felt. If the ink is not completely solidified, some of the ink will be scratched to other areas after passing through the felt. When the light intensity is detected, the light intensity of the area with strong light intensity will become weak. By detecting the light intensity, the integrity of the image or text can be identified to ensure the quality of printing.

[0054] (7) On the basis that the ink can be completely solidified, the printed film passes through the upper partition and the lower partition and enters the large space. The light emitted by the second light source passes through the printed film and shines on the second photosensor. The light intensity is weakened after passing through the printed film and the ink on the printed film. The light intensity is detected by the photosensor. If the ink viscosity is too thin or too thick, the degree of weakening of the light intensity is different. Regardless of whether the ink is too thin or too thick, it will affect the clarity of the printed image or text. By detecting the light intensity, the clarity of the printed pattern or text can be identified. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a schematic diagram of the structure of the present invention;

[0056] Figure 2 It is a schematic diagram of the installation of the support assembly and the flip mechanism of the present invention;

[0057] Figure 3 It is a schematic diagram of the structure of the bracket assembly of the present invention;

[0058] Figure 4 This is a schematic diagram of the support structure of the present invention;

[0059] Figure 5 It is a schematic diagram of the pole structure of the present invention;

[0060] Figure 6 For the present invention Figure 4 The enlarged schematic diagram of point A in the middle;

[0061] Figure 7 This is a schematic diagram of the drive assembly structure of the present invention;

[0062] Figure 8 It is a schematic diagram of the structure of the flipping mechanism of the present invention;

[0063] Fig. 9 It is a schematic diagram of the structure of the thin film detection mechanism of the present invention;

[0064] Fig.10 It is a schematic diagram of the structure of the printing detection mechanism of the present invention.

[0065] In the figure: 100 bracket assembly, 110 bracket, 111 upright pole, 1111 first piece picking block, 1112 second piece picking block, 1113 positioning shaft, 1114 first mounting frame, 1115 first mounting block, 1116 guide groove, 1117 fixing ring, 112 pressure roller, 1121 mounting shaft, 113 second mounting frame, 1131 screw, 114 pressure plate, 1141 deviation correction rod, 1142 deviation correction groove, 120 ink tank, 121 ink roller, 130 driving rod, 131 gear, 140 driving device, 150 driving assembly, 151 translation mechanism, 1511 slider, 1512 upper mounting plate, 1513 lower mounting plate, 152 driving mechanism, 153 second mounting block, 1531 shaft sleeve, 200 flip mechanism, 210 gear ring, 220 driven ring, 221 block, 222 connecting block, 223 mounting hole, 230 connecting rod, 231 connecting hole, 300 film detection mechanism, 310 first mounting seat, 320 first upper cover, 321 first mounting groove, 330 first lower cover, 331 second mounting groove, 340 first guide roller, 400 printing detection mechanism, 410 second mounting seat, 420 second upper cover, 421 upper partition, 422 third mounting groove, 430 second lower cover, 431 lower partition, 432 fourth mounting groove, 440 second guide roller, 450 third guide roller. DETAILED DESCRIPTION

[0066] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0067] The present invention provides a printing device with a quickly detachable pressure roller. The pressure roller can be directly removed from the vertical pole through a flip mechanism, and the pressure roller can be quickly disassembled and installed, thereby improving the replacement efficiency of the pressure roller, thereby indirectly achieving the purpose of improving production efficiency. Please refer to Figure 1 , comprising: a support assembly 100 and a flip mechanism 200; Example 1

[0068] See also Figure 1-3 , the support assembly 100 includes a support 110, a driving rod 130 and a driving device 140;

[0069] The support 110 includes a vertical rod 111 and a pressure roller 112;

[0070] There are two vertical poles 111, and the two vertical poles 111 are symmetrically arranged;

[0071] There are two pressing rollers 112, and the ends of the two pressing rollers 112 are integrally formed with mounting shafts 1121, and one end of the mounting shaft 1121 is provided with a spline groove. The two pressing rollers 112 are arranged between the two vertical poles 111, and the two pressing rollers 112 are symmetrically arranged up and down. The mounting shafts 1121 on the pressing rollers 112 are movably connected to the vertical poles 111 through bearings, and the pressing rollers 112 can rotate between the two vertical poles 111 through bearings. The printed film sheet passes between the two pressing rollers 112, and the upper surface of the printed film sheet is embossed by the pressing roller 112 arranged at the upper end.

[0072] The driving rod 130 is installed at the upper end between the two vertical rods 111 through a bearing. The two ends of the driving rod 130 respectively penetrate the outer side walls of the two vertical rods 111. The driving rod 130 can rotate on the vertical rods 111 through the bearing. The driving rod 130 is arranged at the upper end of the pressure roller 112 and is parallel to the pressure roller 112. Gears 131 are installed at both ends of the circumferential outer side wall of the driving rod 130. The gears 131 are arranged on the outer side of the vertical rods 111. The gears 131 are driven to rotate by the driving rod 130.

[0073] The driving device 140 is composed of a reducer and a motor. The reducer is detachably mounted on the side wall of the bracket 110 by bolts. The output shaft of the reducer is connected to the driving rod 130 by a spline or a flat key. The motor is detachably mounted on the reducer at one end away from the bracket 110 by bolts. The output shaft of the reducer is driven to rotate by the motor, and the driving rod 130 is driven to rotate by the output shaft of the reducer.

[0074] There are two flipping mechanisms 200, which are respectively installed on the outside of the two vertical poles 111. The outer side surface of the flipping mechanism 200 is meshed with the gear 131, and the flipping mechanism 200 is driven to flip through the gear 131. The internal structure of the flipping mechanism 200 is connected to the installation shaft 1121 on the pressure roller 112. The pressure roller 112 is driven to make an arc motion through the flipping of the flipping mechanism 200, and the pressure roller 112 is transferred from between the two vertical poles 111. Then, the pressure roller 112 is removed from the flipping mechanism 200. The pressure roller 112 can be quickly disassembled and installed, which improves the replacement efficiency of the pressure roller 112, thereby indirectly achieving the purpose of improving production efficiency. Example 2

[0075] See also Figure 1-4 and Figure 6-7A first pickup block 1111 is integrally formed on the top of the front side wall of the vertical pole 111. An arc-shaped groove is formed on the end of the first pickup block 1111 away from the vertical pole 111, and an electromagnet is installed in the arc-shaped groove;

[0076] A second pick-up block 1112 is integrally formed at the bottom of the rear side wall of the vertical pole 111. An arc-shaped groove is formed at one end of the second pick-up block 1112 away from the vertical pole 111, and an electromagnet is installed in the arc-shaped groove.

[0077] Two positioning shafts 1113 are welded on the side of the vertical rod 111 away from the pressure roller 112;

[0078] A first mounting frame 1114 is welded on the top of the vertical rod 111 away from the pressure roller 112. The first mounting frame 1114 corresponds to the driving rod 130. The gear 131 is mounted on the inner side of the first mounting frame 1114.

[0079] A first mounting block 1115 is integrally formed on the top of the rear side wall of the upright pole 111;

[0080] Two guide grooves 1116 are provided on the side of the vertical rod 111 away from the pressure roller 112. The guide grooves 1116 penetrate the side of the vertical rod 111 facing the pressure roller 112. The two guide grooves 1116 are distributed between the two positioning shafts 1113.

[0081] A fixing ring 1117 is fixed inside the guide groove 1116. The fixing ring 1117 is a semicircular ring. The fixing ring 1117 is connected to the installation shaft 1121 through a bearing. The installation shaft 1121 can rotate inside the fixing ring 1117 through the bearing.

[0082] The bracket 110 further includes a second mounting frame 113, which is welded to a side of the vertical rod 111 away from the pressure roller 112, and the bracket 110 is disposed between the two guide grooves 1116;

[0083] A screw rod 1131 is installed inside the second installation frame 113. One end of the screw rod 1131 is connected to the vertical rod 111 through a bearing. The other end of the screw rod 1131 passes through a side of the second installation frame 113 away from the vertical rod 111. The screw rod 1131 is connected to the second installation frame 113 through a bearing.

[0084] The support assembly 100 also includes an ink tank 120 and a drive assembly 150;

[0085] The ink tank 120 is detachably mounted between the two vertical rods 111 by bolts. The ink tank 120 is obliquely above the pressure roller 112 arranged at the upper end. The position of the ink tank 120 is preferably set so as not to affect the pressure roller 112 from flipping out of the space between the two vertical rods 111. For example, the pressure roller 112 arranged at the upper end can flip out of the space between the two vertical rods 111 from the left side, so the ink tank 120 needs to be installed obliquely above the right side of the pressure roller 112 arranged at the upper end. An ink roller 121 is installed at the bottom of the ink tank 120. Both ends of the ink roller 121 are connected to the first mounting block 1115 through bearings. The upper part of the ink roller 121 is in the inner cavity of the ink tank 120. The lower part of the ink tank 120 is arranged outside the ink tank 120 and contacts the circumferential outer wall of the pressure roller 112 arranged at the upper end. The pressure roller 112 rotates to drive the ink roller 121 to rotate. The side of the ink roller 121 that is not stained with the pigment rotates to the inner cavity of the ink tank 120 to be stained with the pigment. The side stained with the pigment rotates to the outer side of the ink tank 120 and contacts the pressure roller 112, and the pigment is transferred to the pressure roller 112. The pigment is transferred to the printing film sheet by the pressure roller 112 arranged at the upper end, and a pattern or text is formed on the printing film sheet. The pressure roller 112 arranged at the lower end assists the pressure roller 112 arranged at the upper end to move the film.

[0086] The driving assembly 150 includes a translation mechanism 151, a driving mechanism 152 and a second mounting block 153;

[0087] There are two translation mechanisms 151, which are movably connected to the two second installation frames 113 respectively. The translation mechanism 151 includes a slider 1511, an upper installation plate 1512 and a lower installation plate 1513;

[0088] A threaded hole is provided at one end of the slider 1511, and the threaded hole vertically penetrates the other end of the slider 1511. The slider 1511 is installed on the circumferential outer wall of the screw rod 1131 through the threaded hole. The slider 1511 is arranged on the inner side of the second installation frame 113 and contacts the inner side wall of the second installation frame 113. The slider 1511 can be driven to move along the length direction of the second installation frame 113 on the inner side of the second installation frame 113 by rotating the screw rod 1131.

[0089] The upper mounting plate 1512 is detachably mounted on the top of the slider 1511 by means of bolts, and the bottom of the upper mounting plate 1512 contacts the top of the second mounting frame 113;

[0090] The lower mounting plate 1513 is detachably mounted on the bottom of the slider 1511 by bolts, and the top of the lower mounting plate 1513 contacts the bottom of the second mounting frame 113. The slider 1511 can drive the upper mounting plate 1512 and the lower mounting plate 1513 to move along the length direction of the second mounting frame 113 at the upper and lower sides of the second mounting frame 113.

[0091] There are two driving mechanisms 152, one of which is detachably mounted on the top of an upper mounting plate 1512 adjacent to a spline groove on the mounting shaft 1121 by bolts, and the other driving mechanism 152 is detachably mounted on the bottom of a lower mounting plate 1513 adjacent to a spline groove on the mounting shaft 1121 by bolts. The driving mechanism 152 is composed of a reducer and a motor, the output shaft on the reducer is connected to the spline groove of the mounting shaft 1121 by splines, the motor is mounted on one end of the reducer away from the mounting shaft 1121, the output shaft on the reducer is driven to rotate by the motor, the mounting shaft 1121 is driven to rotate by the output shaft on the reducer, and the mounting shaft 1121 drives the pressure roller 112 to rotate by the mounting shaft 1121;

[0092] The second mounting block 153 is detachably mounted on another set of driving mechanisms 152 by means of bolts. There are two second mounting blocks 153, which are mounted on the top of the upper mounting plate 1512 and the bottom of the lower mounting plate 1513 respectively. A shaft sleeve 1531 is integrally formed on one end of the second mounting block 153 facing the mounting shaft 1121. The shaft sleeve 1531 is sleeved on the outer circumferential wall of the end of the mounting shaft 1121 away from the spline groove through a bearing. The pressing roller 112 is stably fixed between the two upright poles 111 by means of the shaft sleeve 1531 and the driving mechanism 152.

[0093] There are two flipping mechanisms 200, and the two flipping mechanisms 200 include a gear ring 210, a driven ring 220 and a connecting rod 230;

[0094] Gear teeth are arranged on the outer ring and the inner ring of the gear ring 210. Gear teeth are arranged on most of the inner ring of the gear ring 210, and no gear teeth are arranged on a small part of the inner ring. The gear ring 210 is arranged on the side of the vertical rod 111 away from the pressure roller 112, and the teeth on the outer ring of the gear ring 210 mesh with the gear 131.

[0095] There are two driven rings 220, and the driven rings 220 are semicircular structures, one of which is arranged at the inner upper end of the gear ring 210, and the other is arranged at the inner lower end of the gear ring 210. The outer curved surface of the driven ring 220 is provided with gear teeth that mesh with the teeth on the inner ring of the gear ring 210 in stages;

[0096] A clamping block 221 is provided at one end of the driven ring 220 near the center of the driven ring 220. The clamping block 221 matches the guide groove 1116. The clamping block 221 can be completely inserted into the inner side of the guide groove 1116 to fill the guide groove 1116, thereby improving the structural strength of the upright 111. A semicircular groove is provided at one end of the clamping block 221 away from the driven ring 220. The semicircular groove on the clamping block 221 and the fixing ring 1117 can form a complete circle with the mounting shaft 1121. The fixing ring 1117 and the bearing on the mounting shaft 1121 are transitionally matched, the semicircular groove on the clamping block 221 is connected to the mounting shaft 1121 through the bearing, the semicircular groove on the clamping block 221 and the bearing are interference matched, and the mounting shaft 1121 is tightly fixed in the semicircular groove on the clamping block 221 through the bearing. The mounting shaft 1121 and the bearing mounted on the mounting shaft 1121 can be removed from the semicircular groove on the clamping block 221 only after a large external force is applied;

[0097] A connecting block 222 is provided at one end of the driven ring 220 away from the center of the driven ring 220, and a mounting hole 223 is provided on the side of the connecting block 222. The mounting hole 223 coincides with the center of the driven ring 220, and the mounting hole 223 is connected to the positioning shaft 1113 through a bearing, so that the driven ring 220 can be turned over with the mounting hole 223 as the axis.

[0098] The connecting rod 230 is an n-shaped connecting rod, the end of which is welded to the side of the gear ring 210 away from the vertical rod 111, and a connecting hole 231 is provided at the center of the side of the connecting rod 230 away from the gear ring 210, and the connecting hole 231 is detachably connected to the screw rod 1131 through a spline or a flat key;

[0099] Specifically, in the initial state, the pressing roller 112 is installed between the two uprights 111. At this time, the clamping block 221 is inserted into the inner side of the guide groove 1116, the driving assembly 150 is connected to the spline groove on the installation shaft 1121, the shaft sleeve 1531 is connected to the end of the installation shaft 1121 away from the spline hole, and the teeth on the driven ring 220 are in the area where there are no teeth on the inner ring of the gear ring 210. At this time, the driving assembly 150 can drive the pressing roller 112 to rotate for embossing;

[0100] When it is necessary to replace the pressure roller 112, the driving device 140 is started, and the driving rod 130 is driven to rotate by the driving device 140, and the driving rod 130 drives the gear 131 to rotate, and the gear 131 drives the ring gear 210 to rotate. Since the inner ring of the ring gear 210 has no teeth in the area with the driven ring 220 at this time, the ring gear 210 will not drive the driven ring 220 to rotate, and the ring gear 210 drives the connecting rod 230 to make a circular motion, and the screw 1131 is driven to rotate by the connecting rod 230, and the two translation mechanisms 151 are driven to move in opposite directions by the screw 1131, thereby driving the driving mechanism 152 and the sleeve 1531 away from the installation shaft 1121, and releasing the fixation of the installation shaft 1121. When the driving mechanism 152 and the sleeve 1531 are away from the installation shaft 1121, at this time, the area with teeth on the inner ring of the ring gear 210 contacts the teeth on the driven ring 220, driving the driven ring 220 to flip, and the driven ring 220 is turned to rotate. The mounting shaft 1121 is flipped about the axis. Since the block 221 and the bearing on the mounting shaft 1121 are interference fit, the mounting shaft 1121 is flipped in the direction away from the vertical rod 111 by flipping the driven ring 220. The mounting shaft 1121 enters the arc-shaped groove of the first pickup block 1111 or the second pickup block 1112 under the drive of the driven ring 220. The mounting shaft 1121 contacts the electromagnet in the arc-shaped groove. The electromagnet is energized to generate magnetism to adsorb the mounting shaft 1121. At this time, the rotation continues. The block 221 is separated from the output shaft on the mounting shaft 1121 by the force of rotation, and the mounting shaft 1121 is retained in the arc-shaped groove of the first pickup block 1111 or the second pickup block 1112. Then, the power supply of the electromagnet is disconnected, and the mounting shaft 1121 can be easily removed from the first pickup block 1111 or the second pickup block 1112, so that the pressure roller 112 can be quickly disassembled.

[0101] When installing the pressure roller 112, it is only necessary to place the pressure roller 112 to be used in the arc groove on the first pick-up block 1111 or the second pick-up block 1112, turn on the power of the electromagnet to fix the installation shaft 1121, start the driving device 140, the driving device 140 rotates in the opposite direction, drives the gear ring 210 to rotate in the opposite direction, and the gear ring 210 drives the driven ring 220 and the connecting rod 230 to rotate at the same time, and the driven ring 220 drives the block 221 toward the first pick-up block 1111 or the second pick-up block 1112. The second pick-up block 1112 rotates in the direction of rotation, and the semicircular groove on the clamping block 221 contacts the bearing installed on the installation shaft 1121 and is clamped to the bearing through the force of rotation. At this time, the power supply of the electromagnet is cut off, and the fixation of the installation shaft 1121 is released. The installation shaft 1121 enters the inner side of the guide groove 1116 under the drive of the driven ring 220 and contacts the fixed ring 1117. While driving the installation shaft 1121, the connecting rod 230 drives the screw rod 1131 to rotate. Through the screw rod 1131 The two translation mechanisms 151 are driven to move toward each other, and the translation mechanism 151 drives the driving mechanism 152 and the shaft sleeve 1531 to move toward the vertical rod 111. After the installation shaft 1121 enters the inner cavity of the guide groove 1116 and contacts the fixing ring 1117, the teeth on the driven ring 220 contact the part without teeth on the inner ring of the gear ring 210. At this time, the gear ring 210 cannot drive the driven ring 220 to rotate, but can drive the screw 1131 to rotate until the output on the driving mechanism 152 is rotated. The output shaft is inserted into the spline groove on the installation shaft 1121, and the sleeve 1531 is sleeved on the circumferential outer wall of the installation shaft 1121 away from the spline groove to fix the pressure roller 112. The reverse rotation of the gear ring 210 drives the driven ring 220 to reverse, and the pressure roller 112 is fixed between the two vertical poles 111. The staff only needs to move the pressure roller 112, and the pressure roller 112 can be installed quickly, which further improves the replacement efficiency of the pressure roller, thereby indirectly achieving the purpose of improving production efficiency. Example 3

[0102] See also Figure 1-3 and Figure 5 The bracket 110 further includes a pressing plate 114, which is detachably mounted on the top between the two vertical rods 111 by bolts, and the bottom of the pressing plate 114 is arranged obliquely above the driving rod 130, and a gap is reserved between the pressing plate 114 and the driving rod 130. The printing film passes through the gap between the pressing plate 114 and the driving rod 130 and bypasses the driving rod 130 and passes between the two pressing rollers 112. The pressing plate 114 is pressed against the driving rod 130 to avoid folding at the edge of the printing film, thereby ensuring the printing quality;

[0103] A deflection correction rod 1141 is installed on the side wall of the pressing plate 114. There are two deflection correction rods 1141, which are symmetrically distributed on the pressing plate 114. A locking bolt is installed on one side of the deflection correction rod 1141. The locking bolt passes through the deflection correction rod 1141 and contacts the pressing plate 114. The deflection correction rod 1141 is fixed to the pressing plate 114 by the locking bolt. The spacing between the two deflection correction rods 1141 is adjusted according to the width of the printing film.

[0104] Correction grooves 1142 are provided on the facing surfaces of the two correction rods 1141. The printed film passes through the correction grooves 1142 and is inserted into the gap between the pressure plate 114 and the driving rod 130. The correction grooves 1142 limit the lateral displacement of the printed film to avoid deviation of the printed film, thereby further ensuring the printing quality. Example 4

[0105] See also Figure 1-3 and Figure 8 , the film detection mechanism 300 includes a first mounting seat 310, a first upper cover 320, a first lower cover 330 and a first guide roller 340;

[0106] There are two first mounting seats 310, which are detachably mounted on the top of the mounting plate by bolts. The mounting plate is arranged obliquely above the bracket 110. The first mounting seats 310 are arranged on the film inlet side of the vertical pole 111. The two first mounting seats 310 are symmetrically arranged.

[0107] The first upper cover 320 is detachably mounted on the top between the two first mounting seats 310 by bolts. The first upper cover 320 is a hollow structure. A first mounting groove 321 is provided in the middle of the top of the inner cavity of the first upper cover 320. A first photosensor is installed inside the first mounting groove 321.

[0108] The first lower cover 330 is detachably mounted on the bottom between the two first mounting seats 310 by bolts. The first lower cover 330 is a hollow structure. A gap is left between the first lower cover 330 and the first upper cover 320. The gap between the first lower cover 330 and the first upper cover 320 corresponds to the gap between the two pressing rollers 112. The printed film penetrates from the gap between the first lower cover 330 and the first upper cover 320 into the inner cavity of the first upper cover 320 and the first lower cover 330. A second mounting groove 331 is provided at a position corresponding to the first mounting groove 321 at the bottom of the inner cavity of the first lower cover 330. A first light source is installed inside the second mounting groove 331. The light-emitting element on the first light source is arranged toward the first photosensor.

[0109] There are four first guide rollers 340, two of which are rotatably mounted at both ends of the inner cavity of the first upper cover 320, and the other two first guide rollers 340 are mounted at both ends of the inner cavity of the first lower cover 330. A gap corresponding to the gap between the first lower cover 330 and the first upper cover 320 is left between the first guide roller 340 disposed in the inner cavity of the first upper cover 320 and the first guide roller 340 disposed in the inner cavity of the first lower cover 330, and the printed film is guided by the first guide rollers 340;

[0110] Specifically, the light emitted by the first light source passes through the printed film and illuminates the first photosensor. After the light passes through the printed film, the printed film will weaken the intensity of the light. The intensity of the light after passing through the printed film is collected by the first photosensor to detect the thickness of the printed film and determine whether the printed film is qualified. Example 5

[0111] See also Figure 1-3 and Fig. 9 The printing detection mechanism 400 includes a second mounting seat 410, a second upper cover 420, a second lower cover 430, a second guide roller 440 and a third guide roller 450;

[0112] There are two second mounting seats 410, which are detachably mounted on the top of the mounting plate by bolts. The mounting plate is arranged obliquely above the bracket 110. The second mounting seats 410 are arranged on the film outlet side of the vertical rod 111. The two first mounting seats 310 are symmetrically arranged.

[0113] The second upper cover 420 is detachably mounted on the top between the two second mounting seats 410 by bolts. The second upper cover 420 is a hollow structure. The inner cavity of the second upper cover 420 is integrally formed with an upper partition 421. The inner cavity of the second upper cover 420 is divided into two spaces, one large and one small, by the upper partition 421. A felt is detachably mounted on the bottom of the upper partition 421. A cooling device is arranged in the small space of the inner cavity of the second upper cover 420 for solidifying the ink after printing. A third mounting groove 422 is provided at the top of the inner cavity of the large space of the inner cavity of the second upper cover 420. A second photosensor is mounted on the inner side of the third mounting groove 422.

[0114] The second lower cover 430 is detachably mounted on the bottom between the two second mounting seats 410 by bolts. The second lower cover 430 is a hollow structure. The inner cavity of the second lower cover 430 is integrally formed with a lower partition 431. The inner cavity of the second upper cover 420 is divided into two spaces, one large and one small, by the lower partition 431. The inner cavity bottom of the large space of the inner cavity of the second upper cover 420 is provided with a fourth mounting groove 432. The inner side of the fourth mounting groove 432 is provided with a second light source. The light-emitting element on the second light source is arranged toward the second photosensor.

[0115] There is a gap between the second lower cover 430 and the second upper cover 420. The printed film after embossing enters the inner cavity of the second lower cover 430 and the second upper cover 420 through the gap. The printed film first enters the small space, and the surface of the printed film is cooled by a cooling device so that the ink solidifies on the printed film. The solidified printed film passes between the upper partition 421 and the lower partition 431. The side of the printed film with a pattern or text contacts the felt. The ink solidification is detected by the felt. If the ink is not completely solidified, after passing through the felt, part of the ink will be scratched to other areas. When the light intensity is detected, the light intensity of the area with strong light intensity will become weak. The integrity of the image or text can be identified by detecting the light intensity, thereby ensuring the quality of embossing.

[0116] On the basis that the ink can be completely solidified, the printed film passes through the upper partition 421 and the lower partition 431 and enters the large space. The light emitted by the second light source passes through the printed film and irradiates the second photosensor. The light intensity is weakened after passing through the printed film and the ink on the printed film. The light intensity is detected by the photosensor. If the ink is too thin or too thick, the degree of weakening of the light intensity is different. Regardless of whether the ink is too thin or too thick, the clarity of the printed image or text will be affected. By detecting the light intensity, the clarity of the printed pattern or text can be identified.

[0117] There are two second guide rollers 440, which are respectively installed in a small space to guide and transport the printed film after embossing;

[0118] There are four third guide rollers 450 , which are respectively installed at the four corners of the inner cavity of the large space to guide and transport the printed film after the ink on the printed film solidifies. Example 6

[0119] A control system is provided at the bottom of the inner wall of the upright pole 111, and the control system includes a conversion module, a storage module, a calculation module, a processing module and a control module;

[0120] The conversion module is electrically connected to the first photosensor and the second photosensor respectively, and is used to perform analog-to-digital conversion on the collected light intensity data. The storage module is used to execute and store the set comparison data. The calculation module is electrically connected to the conversion module respectively, and is used to calculate the collected light intensity data and calculate the absolute value of the light intensity difference. The processing module is electrically connected to the conversion module, the storage module and the calculation module respectively, and is used to compare the collected light intensity data and the calculated absolute value of the light intensity difference with the stored comparison data and output the comparison result. The control module is electrically connected to the processing module, and is used to receive the comparison result and output different control signals according to the comparison result. The control module is embedded with a communication module for performing data transmission.

[0121] The control system includes the following specific operation steps:

[0122] The light intensity data after penetrating the printed film is set through the storage module , the light intensity data collected by the first photosensor is ;

[0123] when < < When , it means that the thickness of the printing film is just right, which can effectively guarantee the printing quality;

[0124] when < < When the number of printed films is less than 20%, it indicates that the thickness of the printed film is relatively thin, but it will not affect the quality of the final printed product. At this time, the control module controls the communication module to send information to the production line staff, and the production line staff transmits the batch number information of the printed film to the warehouse. The warehouse staff checks the batch of printed films. If the number of printed films in this batch accounts for 20%-30% of the total number of printed films of this type, no processing will be done. If it exceeds 30%, the supplier will be requested to withdraw the batch of printed films.

[0125] when < < When the ink is 0.04mm, it means that the thickness of the printed film is extremely thin. During printing, the ink is very likely to penetrate the printed film, thereby affecting the quality of the finished product after printing. At this time, the control module controls the communication module to send information to the production line staff and the warehouse staff at the same time. The production line staff needs to stop production in time, remove the unused printed film from the equipment for marking, and contact the warehouse staff to transport another batch of printed films to the production line for production and transport the unused printed films on the production line back to the warehouse for isolation. The production line workers also need to transport the printed films that have been printed to the quality inspection department for testing to test the ink penetration rate. When the ink penetrates the film by more than 30%-35%, it can be used normally. When it exceeds 35%, the printed product is scrapped. After receiving the information, the warehouse staff isolates and investigates the batch of printed films and contacts the supplier for withdrawal.

[0126] Based on the above data comparison;

[0127] The light intensity data after penetrating the ink is set through the storage module , the light intensity data collected by the second photosensor is Before comparing the light intensity data, it is necessary to obtain the absolute value of the light intensity data collected by the second photosensor to eliminate the data of the light intensity weakened by the printing film, so as to accurately collect the light intensity data after the light intensity is weakened by the ink, and ensure the accuracy of the data comparison;

[0128] when < < When the ink is thick, it means that the ink has a moderate consistency, which can ensure the clarity of the pattern or text after printing;

[0129] when < < or < < When the ink is too thin or too thick, it means that the ink concentration is too thin or too thick, but it will not affect the clarity of the printed pattern or text. At this time, the control module sends information to the production line workers through the communication module, and no processing is done, and the workers continue to work until the ink is used up, saving costs;

[0130] when < < or < < When the ink concentration is too thin or too thick, it means that the pattern or text is not clear enough, or the image or text is not visible, or the image or text is too blurry to be distinguished. At this time, the control module controls the communication module to send information to the production line workers. After receiving the information, the production line workers immediately stop production, remove the ink from the ink tank 120, and send the removed ink to the quality inspection department for testing to see whether it is an ink ratio problem or an ink quality problem. If it is an ink quality problem, the batch of ink in the warehouse must be isolated in time and the ink supplier must be contacted to process the ink.

[0131] In addition, the production line workers need to contact the warehouse to deliver new ink to the production line for mixing, and put the mixed ink into the inner cavity of the ink tank 120 for printing to ensure the normal operation of the production line. After the ink is replaced, the printed products are sent to the quality inspection department for testing to check the clarity of the printed pattern. If the clarity meets the requirements, they will continue to be used, otherwise they will be scrapped.

[0132] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A printing device with a quickly detachable pressure roller, characterized in that: It comprises a support assembly (100) and a flipping mechanism (200); The support assembly (100) comprises a support (110), a driving rod (130) and a driving device (140), wherein the driving rod (130) and the driving device (140) are both connected to the support (110), the driving rod (130) and the driving device (140) are connected to drive the driving rod (130) to rotate, and gears (131) are arranged at both ends of the driving rod (130), and the gears (131) are driven to rotate by the driving rod (130); The support (110) comprises a vertical rod (111) and a pressure roller (112), wherein the pressure roller (112) is movably connected to the vertical rod (111), and mounting shafts (1121) are provided at both ends of the pressure roller (112); The flipping mechanism (200) is connected to the driving rod (130) and the pressure roller (112) respectively through the gear (131) and the mounting shaft (1121); the flipping mechanism (200) is driven to flip through the gear (131); and the pressure roller (112) is driven to move out of the inner side of the bracket (110) through the flipping mechanism (200); The turning mechanism (200) comprises: A gear ring (210), wherein gear teeth are arranged on both the outer ring and the inner ring of the gear ring (210), gear teeth are arranged on most areas of the inner ring of the gear ring (210), and gear teeth are not arranged on a small area, the gear ring (210) is arranged on a side of the vertical rod (111) away from the pressure roller (112), and the teeth on the outer ring of the gear ring (210) are meshed with the gear (131); A driven ring (220), wherein the number of the driven rings (220) is two, and the driven rings (220) are of a semicircular structure, wherein one of the driven rings (220) is arranged at the inner upper end of the gear ring (210), and the other is arranged at the inner lower end of the gear ring (210), and gear teeth are arranged on the outer curved surface of the driven ring (220) to mesh with the teeth on the inner ring of the gear ring (210) in stages, and a clamping block (221) is arranged on the side wall of the driven ring (220), and a connecting block (222) is arranged on the inner side of the driven ring (220), and a mounting hole (223) movably connected to the positioning shaft (1113) is opened on the side wall of the connecting block (222); A connecting rod (230), wherein the connecting rod (230) is arranged on the side wall of the gear ring (210), and a connecting hole (231) connected to the screw rod (1131) is opened on the side wall of the connecting rod (230).

2. A printing device with a quickly detachable pressure roller according to claim 1, characterized in that: The side wall of the vertical pole (111) is provided with a first pickup block (1111), a second pickup block (1112) and a first installation block (1115); the first pickup block (1111) and the second pickup block (1112) are diagonally symmetrical; the first installation block (1115) and the second pickup block (1112) are on the same side wall; and the first installation block (1115) is at the upper end of the second pickup block (1112); A positioning shaft (1113) and a first installation frame (1114) are provided on the side surface of the vertical rod (111), and the first installation frame (1114) is provided on the upper end of the positioning shaft (1113); A guide groove (1116) is provided on the side wall of the vertical rod (111), and a fixing ring (1117) is provided in the inner cavity of the guide groove (1116).

3. A printing device with a quickly detachable pressure roller according to claim 2, characterized in that: The support (110) further comprises: A second installation frame (113), the second installation frame (113) being arranged on a side surface of the vertical pole (111), a screw rod (1131) being arranged on an inner side of the second installation frame (113), and the screw rod (1131) being movably connected to a side surface of the vertical pole (111); A pressure plate (114), wherein the pressure plate (114) is arranged on the inner side of the vertical rod (111) and is parallel to the pressure roller (112); a deviation correction rod (1141) is arranged on the side wall of the pressure plate (114); and a deviation correction groove (1142) is opened on the side wall of the deviation correction rod (1141).

4. A printing device with a quickly detachable pressure roller according to claim 3, characterized in that: The support assembly (100) further comprises: An ink trough (120), wherein the ink trough (120) is arranged on the inner side of the vertical rod (111), the ink trough (120) is arranged obliquely above the pressing roller (112) and is parallel to the pressing roller (112), an ink roller (121) is arranged at the bottom of the ink trough (120), and the ink roller (121) is in contact with the pressing roller (112); A drive assembly (150), wherein the drive assembly (150) is movably connected to the second installation frame (113).

5. A printing device with a quickly detachable pressure roller according to claim 4, characterized in that: The drive assembly (150) comprises: a translation mechanism (151), the translation mechanism (151) being arranged on the second installation frame (113) and connected to the screw rod (1131), the translation mechanism (151) comprising a slider (1511), an upper installation plate (1512) and a lower installation plate (1513), a threaded hole being provided at the end of the slider (1511), the slider (1511) being arranged on the inner side of the second installation frame (113) and connected to the screw rod (1131) through the threaded hole, the upper installation plate (1512) being arranged at the top of the slider (1511) and contacting the top of the second installation frame (113), and the lower installation plate (1513) being arranged at the bottom of the slider (1511) and contacting the bottom of the second installation frame (113); A driving mechanism (152), the driving mechanism (152) being connected to the translation mechanism (151) and being detachably connected to the mounting shaft (1121); A second mounting block (153), the second mounting block (153) is connected to the translation mechanism (151) and is detachably connected to the mounting shaft (1121).

6. The printing device with a quickly detachable pressure roller according to claim 1, characterized in that: A film detection mechanism (300) is provided on the top of the support assembly (100), and the film detection mechanism (300) comprises: A first mounting seat (310), the first mounting seat (310) being arranged obliquely above the bracket assembly (100) via a mounting plate; A first upper cover (320), the first upper cover (320) being arranged at the inner upper end of the first mounting seat (310), a first mounting groove (321) being provided at the top of the inner cavity of the first upper cover (320), and a first photosensor being installed inside the first mounting groove (321); A first lower cover body (330), the first lower cover body (330) being arranged at the inner lower end of the first mounting seat (310), the first lower cover body (330) corresponding to the first upper cover body (320) but not in contact with the first upper cover body (320), a second mounting groove (331) being provided at the bottom of the inner cavity of the first lower cover body (330), the second mounting groove (331) corresponding to the first mounting groove (321), and a first light source being installed inside the second mounting groove (331); A first guide roller (340), the first guide roller (340) is in a rectangular shape and is movably mounted at the four corners of the inner cavities of the first upper cover body (320) and the first lower cover body (330).

7. A printing device with a quickly detachable pressure roller according to claim 6, characterized in that: A printing detection mechanism (400) is arranged on the top of the support assembly (100), and the printing detection mechanism (400) comprises: A second mounting seat (410), the second mounting seat (410) being arranged obliquely above the bracket assembly (100) via a mounting plate; A second upper cover body (420), wherein the second upper cover body (420) is arranged at the inner upper end of the second mounting seat (410), an upper partition (421) is arranged in the inner cavity of the second upper cover body (420), a third mounting groove (422) is arranged at the top of the inner cavity of the second upper cover body (420), and a second photosensor is installed in the inner side of the third mounting groove (422); A second lower cover body (430), wherein the second lower cover body (430) is arranged at the inner lower end of the second mounting seat (410), the second lower cover body (430) corresponds to but does not contact the second upper cover body (420), the inner cavity of the second lower cover body (430) is provided with a lower partition (431) corresponding to the upper partition (421), the inner cavity bottom of the second lower cover body (430) is provided with a fourth mounting groove (432) corresponding to the third mounting groove (422), and the inner cavity of the fourth mounting groove (432) is provided with a second light source; A second guide roller (440), the second guide roller (440) being installed in the inner cavity of the second upper cover body (420) and the second lower cover body (430); A third guide roller (450), wherein the third guide roller (450) is installed in the inner cavity of the second upper cover body (420) and the second lower cover body (430), and the third guide roller (450) and the second guide roller (440) are isolated from each other by the upper partition plate (421) and the lower partition plate (431).

8. The printing device with a quickly detachable pressure roller according to claim 7, characterized in that: A control system is provided at the bottom of the inner side wall of the upright pole (111), and the control system comprises: A conversion module, the conversion module being electrically connected to the first photosensor and the second photosensor respectively, and being used for performing analog-to-digital conversion on the collected light intensity data; A storage module, the storage module is used to execute storage of set comparison data; A calculation module, the calculation module and the conversion module are respectively used to calculate the collected light intensity data and calculate the absolute value of the light intensity difference; A processing module, the processing module is electrically connected to the conversion module, the storage module and the calculation module respectively, and is used to compare the collected light intensity data and the calculated absolute value of the light intensity difference with the stored comparison data and output the comparison result; A control module is electrically connected to the processing module and is used to receive the comparison result and output different control signals according to the comparison result. The control module is embedded with a communication module for performing data transmission.

9. A printing device with a quickly detachable pressure roller according to claim 8, characterized in that: The control system includes the following specific operation steps: S1: The first photosensor is used to collect the light intensity data after the first light source penetrates the printed film, and the data is output to the processing module; the second photosensor is used to collect the light intensity data after the second light source penetrates the printed film and the pattern printed on the printed film, and the second photosensor inputs the collected light intensity data into the calculation module, and the calculation module calculates the difference between the light intensity data collected by the second photosensor and the light intensity data collected by the first photosensor and inputs the difference into the processing module, and outputs the collected data to the analog-to-digital conversion module for analog-to-digital conversion; S2: Comparing the light intensity data collected by the first photosensor with the data stored in the storage module through the processing module, obtaining the data of the thickness of the printed film and outputting it, and comparing the difference with the data stored in the storage module through the processing module, obtaining the data of the thickness of the pigment on the printed pattern and the data of the pigment distribution and outputting them; S3: After receiving the comparison result output by the processing module, the control module outputs different control signals according to the comparison result data, and processes the printed film before printing and the product after printing respectively.

Images