Thermosensitive self-adhesive label flexo printing machine with automatic infrared drying function and control method of thermosensitive self-adhesive label flexo printing machine

Abstract

The invention relates to the technical field of thermosensitive self-adhesive label flexographic printing machines, in particular to a thermosensitive self-adhesive label flexographic printing machine with an automatic infrared drying function and a control method thereof.The thermosensitive self-adhesive label flexographic printing machine comprises a feeding unit, flexographic printing units and a material receiving unit, the multiple sets of flexographic printing units are arranged between the feeding unit and the material receiving unit, and a drying shell is installed on one side of each flexographic printing unit; a drying mechanism is installed at the upper end of the drying shell, a stress releasing mechanism is installed in the drying shell, and an infrared drying lamp is fixedly connected to the upper end in the drying shell; the stress releasing mechanism comprises a transverse roller, a rotating shaft is fixedly connected to the interior of the transverse roller, an inclined convex block is welded and fixed to the outer side of the transverse roller, and a first gear is fixedly connected to the outer side of one rotating shaft. And the problem that the thermosensitive self-adhesive label is difficult to adhere to the packaging box due to edge warping can be prevented.

Description

Technical Field

[0001] The invention relates to the technical field of thermal self-adhesive label flexographic printing machines, in particular to a thermal self-adhesive label flexographic printing machine with automatic infrared drying and a control method thereof. Background Art

[0002] The thermal self-adhesive label flexographic printing machine with automatic infrared drying is an advanced label printing equipment, which combines thermal printing technology and self-adhesive flexographic printing process, and is equipped with an automatic infrared drying system; The thermal self-adhesive label flexographic printing machine with automatic infrared drying improves the efficiency and quality of label printing by integrating multiple technologies. It is an important equipment in the modern label printing industry. The moisture content of ink used for printing thermal self-adhesive labels is generally more than 50%. During the drying process, if the internal stress of the label warping cannot be reduced, the thermal self-adhesive label will warp after drying, which not only affects the appearance but also makes it impossible to stick the thermal self-adhesive label to the packaging box. Therefore, in order to solve the above problems, a thermal self-adhesive label flexographic printing machine with automatic infrared drying and a control method thereof are proposed. Summary of the invention

[0003] The object of the present invention is to provide a thermal self-adhesive label flexographic printing machine with automatic infrared drying and a control method thereof, so as to solve the problem that the moisture content of the ink used for printing thermal self-adhesive labels generally exceeds 50%. During the drying process, if the internal stress of the label warping cannot be reduced, the thermal self-adhesive label after drying will warp, which not only affects the appearance but also makes it impossible for the thermal self-adhesive label to be pasted on the packaging box.

[0004] To achieve the above object, the present invention provides the following technical solutions: A thermosensitive self-adhesive label flexographic printing machine with automatic infrared drying and a control method thereof, comprising a feeding unit, a flexographic printing unit and a receiving unit, wherein a plurality of groups of flexographic printing units are arranged between the feeding unit and the receiving unit, a drying shell is installed on one side of the flexographic printing unit, a drying mechanism is installed on the upper end of the drying shell, a stress release mechanism is installed inside the drying shell, and an infrared drying lamp is fixedly connected to the upper end of the drying shell; the stress release mechanism comprises a transverse roller, a rotating shaft is fixedly connected inside the transverse roller, an oblique protrusion is welded and fixed on the outer side of the transverse roller, a first gear is fixedly connected to the outer side of one of the rotating shafts, a pulley is fixedly fixed to the outer side of the other rotating shaft, the first gear is meshed with a second gear, a central shaft is fixedly connected to the center of the second gear, a pulley is fixedly connected to the outer side of the central shaft, the top end of the central shaft is fixedly connected to the main shaft of a driving motor, and the pulleys are rotationally connected through a V-belt.

[0005] As a further optimization of the present invention, two transverse rollers and two rotating shafts are provided, both ends of the rotating shaft are exposed on the outside of the transverse rollers, the transverse rollers and the rotating shaft have the same axis, the transverse rollers are parallel to each other, and the transverse rollers are arranged at the lower end of the thermal self-adhesive label.

[0006] As a further optimization of the present invention, a support frame is fixedly connected to the inner side of the bottom end of the drying shell by bolts, two support frames are provided, the support frames are parallel to each other, the support frames are rotatably connected to the rotating shaft and the central axis, and the rotating shaft is parallel to the central axis.

[0007] As a further optimization of the present invention, the driving motor housing and the drying housing are fixedly connected by bolts, the driving motor main shaft passes through the drying housing and is exposed inside the drying housing, and the oblique protrusions arranged on the outside of the two transverse rollers are symmetrically arranged with the center point of the drying housing as the center point.

[0008] As a further optimization of the present invention, the drying shell includes a shell body, one end of the shell body is fixedly connected to a fixing flange, an exhaust port is opened on the inner side of the upper end of the shell body, a discharge port is opened on one side of the shell body, and a through hole is opened on the lower end of the side of the shell body with the discharge port.

[0009] As a further optimization of the present invention, a heat-sensitive adhesive label is arranged inside the discharge port of the shell body, the upper end of the shell body is connected with the drying mechanism through the exhaust port, and the main shaft of the driving motor is arranged in the through hole of the shell body.

[0010] As a further optimization of the present invention, there are two infrared drying lamps, which are parallel to each other and are arranged on the upper end of the thermal adhesive label. The infrared drying lamp close to the feeding unit is a low-power infrared lamp, and the infrared drying lamp far away from the feeding unit is a high-power infrared lamp.

[0011] As a further optimization of the present invention, the drying mechanism includes a column shell, a mounting groove is opened in the middle of the column shell, a fixing plate is installed inside the mounting groove, a semicircular block is fixedly connected to one end of the fixing plate, a drying mesh plate is fixedly connected to the inside of the fixing plate, and an exhaust fan is fixedly connected to the inner side of the upper end of the column shell.

[0012] As a further optimization of the present invention, the semicircular block is exposed on the outside of the column shell, and a groove is provided on the part of the semicircular block exposed on the outside of the column shell, the exhaust fan, the drying screen and the center point of the column shell are arranged on the same vertical line, and the bottom end of the column shell is connected to the interior of the outer shell body through the exhaust port.

[0013] As further optimized content of the present invention, S1: loading and printing the thermal self-adhesive label by the flexographic printing unit: the feeding unit, the receiving unit and the flexographic printing unit cooperate with each other to realize the loading of the thermal self-adhesive label, and print the thermal self-adhesive label in the loading process; S2: The thermal self-adhesive labels printed by the flexographic printing unit enter the drying shell for drying: Each group of thermal self-adhesive labels printed by the flexographic printing unit enters the drying shell and is dried in a tunnel by the cooperation of two infrared drying lamps; S3: During the drying process of the thermal self-adhesive label, the water vapor inside the drying shell is discharged and absorbed by the drying mechanism: the water vapor generated by drying the printing position at the upper end of the thermal self-adhesive label is discharged through the exhaust fan, and in the process of discharge, the water vapor is adsorbed by the drying screen; S4: During the drying process, the stress of the thermal self-adhesive label is released through the stress release mechanism: At the same time, during the drying process, the two transverse rollers are synchronously rotated in opposite directions, so that the inclined protrusions intermittently contact the two sides of the bottom end of the thermal self-adhesive label, and a slight stretch is applied to the two sides of the bottom end of the thermal self-adhesive label to minimize the internal stress that causes the label to warp.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by setting up the stress release mechanism, during the drying process of the thermal self-adhesive label, the lateral rollers can be synchronously rotated in opposite directions, so that the inclined protrusions can intermittently contact the two sides of the bottom end of the thermal self-adhesive label, and a slight stretch is applied to the two sides of the bottom end of the thermal self-adhesive label to minimize the internal stress that causes the label to warp, thereby ensuring the aesthetics of the thermal self-adhesive label and preventing the thermal self-adhesive label from being difficult to stick to the packaging box due to the warping of the edge.

[0015] 2. In the present invention, the drying mechanism is provided to dry the water vapor generated by the printing position at the upper end of the thermal self-adhesive label, and the water vapor is discharged through the exhaust fan. In the process of discharge, the water vapor is adsorbed by the drying screen to improve the dryness of the entire workstation; 3. In the present invention, by setting up two infrared drying lamps with different powers, the drying process of the heat-sensitive self-adhesive label passing through the inside of the shell body is divided into multiple stages, and each stage uses different infrared radiation intensity and time, which can effectively improve the drying uniformity and avoid label warping. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of the drying shell structure of the present invention; Figure 3 This is a schematic diagram of the installation position structure of the drying mechanism of the present invention; Figure 4 It is a schematic diagram of the drying mechanism structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the housing body of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of the structure at A in the middle; Figure 7 This is a schematic diagram of the installation position structure of the support frame of the present invention; Figure 8 It is a schematic diagram of the structure of the stress release mechanism of the present invention.

[0017] In the figure: 1. Feeding unit; 2. Flexographic printing unit; 3. Drying shell; 31. Shell body; 32. Fixing flange; 33. Exhaust port; 34. Discharge port; 35. Perforation; 4. Drying mechanism; 41. Column shell; 42. Mounting slot; 43. Exhaust fan; 44. Fixing plate; 45. Drying screen plate; 46. Semicircular block; 5. Thermal self-adhesive label; 6. Material receiving unit; 7. stress release mechanism; 71. transverse roller; 72. oblique protrusion; 73. rotating shaft; 74. first gear; 75. second gear; 76. central shaft; 77. driving motor; 78. V-belt; 79. pulley; 8. Infrared drying lamp; 9. Support frame. DETAILED DESCRIPTION

[0018] See also Figure 1-8 , the present invention provides a technical solution: A thermosensitive self-adhesive label flexographic printing machine with automatic infrared drying and a control method thereof, comprising a feeding unit 1, a flexographic printing unit 2 and a receiving unit 6, wherein a plurality of groups of flexographic printing units 2 are arranged between the feeding unit 1 and the receiving unit 6, a drying shell 3 is arranged on one side of the flexographic printing unit 2, a drying mechanism 4 is arranged on the upper end of the drying shell 3, a stress release mechanism 7 is arranged inside the drying shell 3, and an infrared drying lamp 8 is fixedly connected to the upper end of the drying shell 3; the stress release mechanism 7 comprises a transverse roller 71, a rotating shaft 73 is fixedly connected inside the transverse roller 71, an oblique protrusion 72 is welded and fixed on the outer side of the transverse roller 71, a first gear 74 is fixedly connected to the outer side of one rotating shaft 73, a pulley 79 is fixedly fixed to the outer side of the other rotating shaft 73, the first gear 74 is meshed with a second gear 75, a central shaft 76 is fixedly connected to the center of the second gear 75, a pulley 79 is fixedly connected to the outer side of the central shaft 76, the top of the central shaft 76 is fixedly connected to the main shaft of a driving motor 77, and the pulleys 79 are rotatably connected through a V-belt 78.

[0019] As a technical solution for further implementation of this solution, two transverse rollers 71 and two rotating shafts 73 are provided, and both ends of the rotating shaft 73 are exposed on the outside of the transverse roller 71. The transverse roller 71 and the rotating shaft 73 have the same axis, and the transverse rollers 71 are parallel to each other. The transverse rollers 71 are arranged at the lower end of the thermal self-adhesive label 5, and the inner side of the bottom end of the drying shell 3 is fixedly connected with a support frame 9 by bolts. There are two support frames 9, and the support frames 9 are parallel to each other. The support frames 9 are rotatably connected to the rotating shaft 73 and the central shaft 76, and the rotating shaft 73 is parallel to the central shaft 76. The driving motor The housing 77 is fixedly connected to the drying housing 3 by bolts, the main shaft of the driving motor 77 passes through the drying housing 3 and is exposed inside the drying housing 3, the oblique protrusions 72 arranged outside the two transverse rollers 71 are symmetrically arranged with the center point of the drying housing 3 as the center point, and during the drying process, the two transverse rollers 71 are synchronously rotated in opposite directions, so that the oblique protrusions 72 intermittently contact the two sides of the bottom end of the thermal self-adhesive label 5, and a slight stretch is applied to the two sides of the bottom end of the thermal self-adhesive label 5, so as to minimize the internal stress that causes the label to warp; As a technical solution for further implementing the present scheme, the drying shell 3 includes a shell body 31, one end of the shell body 31 is fixedly connected to a fixing flange 32, an exhaust port 33 is provided on the inner side of the upper end of the shell body 31, a discharge port 34 is provided on one side of the shell body 31, and a through hole 35 is provided on the lower end of the side of the shell body 31 where the discharge port 34 is provided. By setting the drying shell 3, the drying mechanism 4 and the stress release mechanism 7 can be stably fixed; As a technical solution for further implementation of this scheme, a heat-sensitive adhesive label 5 is arranged inside the shell body 31 through the discharge port 34, the upper end of the shell body 31 is connected to the drying mechanism 4 through the exhaust port 33, and the main shaft of the driving motor 77 is arranged in the through hole 35 opened inside the shell body 31. The setting of the shell body 31 can ensure the stability of the overall structure of the device; As a technical solution for further implementation of this scheme, two infrared drying lamps 8 are provided, the infrared drying lamps 8 are parallel to each other, and the infrared drying lamps 8 are arranged on the upper end of the heat-sensitive self-adhesive label 5. The infrared drying lamp 8 close to the feeding unit 1 is a low-power infrared lamp, and the infrared drying lamp 8 far away from the feeding unit 1 is a high-power infrared lamp. Through the above arrangement, the heat-sensitive self-adhesive label after printing can be gradually heated; As a technical solution for further implementation of this scheme, the drying mechanism 4 includes a column shell 41, a mounting groove 42 is opened in the middle of the column shell 41, a fixing plate 44 is installed inside the mounting groove 42, a semicircular block 46 is fixedly connected to one end of the fixing plate 44, a drying screen 45 is fixedly connected inside the fixing plate 44, and an exhaust fan 43 is fixedly connected to the inner side of the upper end of the column shell 41. Through the above arrangement, the water vapor generated during the drying process of the heat-sensitive self-adhesive label 5 can be promptly processed; As a technical solution for further implementation of this scheme, the semicircular block 46 is exposed outside the column shell 41, and a groove is provided on the part of the semicircular block 46 exposed outside the column shell 41. The exhaust fan 43, the drying mesh plate 45 and the center point of the column shell 41 are arranged on the same vertical line, and the bottom end of the column shell 41 is connected to the inside of the shell body 31 through the exhaust port 33. Through the above arrangement, it is convenient to replace the drying mesh plate 45 through the groove later, and at the same time, the connectivity of the drying shell 3 and the drying mechanism 4 can be ensured; S1: Loading and printing the thermal self-adhesive label 5 through the flexographic printing unit 2: The feeding unit 1, the receiving unit 6 and the flexographic printing unit 2 cooperate with each other to realize the loading of the thermal self-adhesive label 5, and print the thermal self-adhesive label 5 in the loading process; S2: The heat-sensitive self-adhesive labels 5 printed by the flexographic printing unit 2 enter the drying housing 3 for drying: Each group of heat-sensitive self-adhesive labels 5 printed by the flexographic printing unit 2 enters the drying housing 3 and is dried in a tunnel through the cooperation of two infrared drying lamps 8; S3: During the drying process of the heat-sensitive adhesive label 5, the water vapor inside the drying housing 3 is discharged and absorbed by the drying mechanism 4: the water vapor generated by drying the printing position at the upper end of the heat-sensitive adhesive label 5 is guided and discharged through the exhaust fan 43, and in the process of discharge, the water vapor is adsorbed by the drying screen 45; S4: During the drying process, the stress of the thermal self-adhesive label 5 is released by the stress release mechanism 7: At the same time, during the drying process, the two transverse rollers 71 are synchronously rotated in opposite directions, so that the inclined protrusions 72 intermittently contact the two sides of the bottom end of the thermal self-adhesive label 5, and a slight stretch is applied to the two sides of the bottom end of the thermal self-adhesive label 5 to minimize the internal stress that causes the label to warp.

[0020] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A thermal self-adhesive label flexographic printing machine with automatic infrared drying, comprising a feeding unit (1), a flexographic printing unit (2) and a receiving unit (6), characterized in that: A plurality of flexographic printing units (2) are arranged between the feeding unit (1) and the receiving unit (6); a drying shell (3) is installed on one side of the flexographic printing unit (2); a drying mechanism (4) is installed on the upper end of the drying shell (3); a stress release mechanism (7) is installed inside the drying shell (3); and an infrared drying lamp (8) is fixedly connected to the upper end of the drying shell (3); The stress release mechanism (7) comprises a transverse roller (71), a rotating shaft (73) is fixedly connected inside the transverse roller (71), an oblique protrusion (72) is welded and fixed on the outside of the transverse roller (71), a first gear (74) is fixedly connected on the outside of one of the rotating shafts (73), a belt pulley (79) is fixedly connected on the outside of the other rotating shaft (73), the first gear (74) is meshed with a second gear (75), a center shaft (76) is fixedly connected at the center of the second gear (75), a belt pulley (79) is fixedly connected on the outside of the center shaft (76), a top end of the center shaft (76) is fixedly connected to a main shaft of a driving motor (77), and the belt pulleys (79) are rotationally connected via a V-belt (78).

2. The thermal self-adhesive label flexographic printing machine with automatic infrared drying according to claim 1, characterized in that: Two transverse rollers (71) and two rotating shafts (73) are provided, and both ends of the rotating shaft (73) are exposed outside the transverse roller (71). The transverse roller (71) and the rotating shaft (73) share the same axis. The transverse rollers (71) are parallel to each other, and the transverse rollers (71) are arranged at the lower end of the thermal self-adhesive label (5).

3. The thermal self-adhesive label flexographic printing machine with automatic infrared drying according to claim 1, characterized in that: A support frame (9) is fixedly connected to the inner side of the bottom end of the drying shell (3) by bolts. Two support frames (9) are provided. The support frames (9) are parallel to each other. The support frames (9) are rotatably connected to the rotating shaft (73) and the central shaft (76). The rotating shaft (73) and the central shaft (76) are parallel to each other.

4. The thermal self-adhesive label flexographic printing machine with automatic infrared drying according to claim 1, characterized in that: The housing of the driving motor (77) is fixedly connected to the drying housing (3) by bolts, the main shaft of the driving motor (77) passes through the drying housing (3) and is exposed inside the drying housing (3), and the oblique protrusions (72) arranged on the outside of the two transverse rollers (71) are symmetrically arranged with the center point of the drying housing (3) as the center point.

5. The thermal self-adhesive label flexographic printing machine with automatic infrared drying according to claim 1, characterized in that: The drying shell (3) comprises a shell body (31), one end of the shell body (31) is fixedly connected to a fixing flange (32), an exhaust port (33) is provided on the inner side of the upper end of the shell body (31), a discharge port (34) is provided on one side of the shell body (31), and a through hole (35) is provided on the lower end of the side of the shell body (31) where the discharge port (34) is provided.

6. The thermal self-adhesive label flexographic printing machine with automatic infrared drying according to claim 5, characterized in that: A heat-sensitive adhesive label (5) is arranged inside the outer shell body (31) through the material discharge port (34), the upper end of the outer shell body (31) is connected to the drying mechanism (4) through the exhaust port (33), and the main shaft of the driving motor (77) is arranged in the through hole (35) provided in the outer shell body (31).

7. The thermal self-adhesive label flexographic printing machine with automatic infrared drying according to claim 1, characterized in that: Two infrared drying lamps (8) are provided, the infrared drying lamps (8) are parallel to each other, and the infrared drying lamps (8) are arranged on the upper end of the thermal adhesive label (5), the infrared drying lamp (8) close to the feeding unit (1) is a low-power infrared lamp, and the infrared drying lamp (8) far from the feeding unit (1) is a high-power infrared lamp.

8. The thermal self-adhesive label flexographic printing machine with automatic infrared drying according to claim 1, characterized in that: The drying mechanism (4) comprises a column shell (41), a mounting groove (42) is provided in the middle of the column shell (41), a fixing plate (44) is installed inside the mounting groove (42), a semicircular block (46) is fixedly connected to one end of the fixing plate (44), a drying screen (45) is fixedly connected inside the fixing plate (44), and an exhaust fan (43) is fixedly connected to the inner side of the upper end of the column shell (41).

9. The thermal self-adhesive label flexographic printing machine with automatic infrared drying according to claim 8, characterized in that: The semicircular block (46) is exposed outside the column shell (41), and a groove is formed in the portion of the semicircular block (46) exposed outside the column shell (41). The exhaust fan (43) and the center points of the drying screen (45) and the column shell (41) are arranged on the same vertical line. The bottom end of the column shell (41) is connected to the interior of the outer shell body (31) through the exhaust port (33).

10. A control method for a thermal self-adhesive label flexographic printing machine with automatic infrared drying according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Loading and printing the thermal self-adhesive label (5) through the flexographic printing unit (2): The feeding unit (1), the receiving unit (6) and the flexographic printing unit (2) cooperate with each other to realize the loading of the thermal self-adhesive label (5), and print the thermal self-adhesive label (5) during the loading process; S2: The heat-sensitive self-adhesive labels (5) printed by the flexographic printing unit (2) enter the drying housing (3) for drying: each group of heat-sensitive self-adhesive labels (5) printed by the flexographic printing unit (2) enters the interior of the drying housing (3) and is dried in a tunnel by the cooperation of two infrared drying lamps (8); S3: During the drying process of the thermal self-adhesive label (5), the water vapor inside the drying shell (3) is discharged and absorbed by the drying mechanism (4): the water vapor generated by drying the upper printing position of the thermal self-adhesive label (5) is guided and discharged by the exhaust fan (43), and in the process of being discharged, the water vapor is adsorbed by the drying screen (45); S4: During the drying process, the stress of the thermal self-adhesive label (5) is released by the stress release mechanism (7): during the drying process, the two transverse rollers (71) are synchronously rotated in opposite directions, so that the inclined protrusions (72) intermittently contact the two sides of the bottom of the thermal self-adhesive label (5), and a slight stretch is applied to the two sides of the bottom of the thermal self-adhesive label (5), so as to minimize the internal stress that causes the label to warp.

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