A hot transfer printing machine for producing a drum with a film

Abstract

The utility model discloses a kind of hot transfer printing machines for barrel production film pasting, including cabinet, workbench is provided on cabinet, wherein, corner plate is rotatably arranged on workbench, template is arranged on corner plate and can move horizontally along the front-back direction of corner plate, film placing mechanism and film collecting mechanism are oppositely arranged on the both sides of template;Vertical column is vertically arranged on workbench and located behind corner plate, clamping rotating mechanism is arranged on vertical column and located between film placing mechanism and film collecting mechanism, and hot transfer printing mechanism is arranged above clamping rotating mechanism;Tracking positioning mechanism is arranged on film placing mechanism, and circumference measuring mechanism is arranged on film collecting mechanism;PLC controller is further arranged on vertical column, the input end of PLC controller is connected with the output end of tracking positioning mechanism and circumference measuring mechanism, and the output end of PLC controller is connected with the controlled end of corner plate, template, film placing mechanism, film collecting mechanism, clamping rotating mechanism and hot transfer printing mechanism.The present application can efficiently and high quality complete the automatic film pasting of barrel production.

Description

Technical Field

[0001] This utility model relates to the technical field of barrel processing equipment, specifically to a heat transfer printing machine for applying film during barrel production. Background Technology

[0002] Traditional cylindrical film application requires manual feeding, alignment, and heat pressing, which is inefficient and prone to problems such as film misalignment and air bubbles. Existing equipment lacks film tracking and positioning functions, which is detrimental to improving the film application effect and has insufficient automation. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a heat transfer printing machine for film application in cylindrical production, so as to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0005] A heat transfer printing machine for laminating film onto cylindrical containers includes a machine housing with a worktable mounted on it. A corner plate is rotatably mounted on the worktable, and a template movable horizontally along the front-rear direction of the corner plate is mounted on the corner plate. A film feeding mechanism and a film receiving mechanism are positioned opposite each other on either side of the template for traction and guidance of the film material. A column is erected on the worktable behind the corner plate, and a clamping and rotating mechanism is mounted on the column between the film feeding and receiving mechanisms for fixing the cylindrical container and rotating it. A clamping and rotating mechanism is also positioned above the clamping and rotating mechanism to... A heat transfer mechanism for applying heat transfer film to a cylindrical drum; the film feeding mechanism is equipped with a tracking and positioning mechanism for tracking and positioning the film material, and the film receiving mechanism is equipped with a circumference measuring mechanism for measuring the circumference data of the cylindrical drum; a PLC controller for automatic control is also installed on the column, the input terminal of the PLC controller is connected to the output terminal of the tracking and positioning mechanism and the circumference measuring mechanism respectively, and the output terminal of the PLC controller is connected to the controlled terminals of the corner plate, template, film feeding mechanism, film receiving mechanism, clamping and rotating mechanism and heat transfer mechanism respectively.

[0006] Preferably, the corner plate is connected to a rotary drive mechanism for driving the corner plate to rotate. The rotary drive mechanism includes a rotary seat that is rotatably connected to the worktable. The top of the rotary seat is connected to the bottom of the corner plate. The bottom of the rotary seat passes through the housing and is connected to a planetary reducer through a first rotary transmission assembly. The input end of the planetary reducer is connected to a corner plate rotary drive motor. The controlled end of the corner plate rotary drive motor is connected to the output end of the PLC controller.

[0007] Preferably, two electric guide rails are arranged opposite each other on both sides of the corner plate, and the bottom of the template is connected to the sliders of the two electric guide rails. The controlled end of the electric guide rail is connected to the output end of the PLC controller.

[0008] Preferably, the column is inverted L-shaped, and the heat transfer mechanism includes a lifting cylinder mounted on the column's horizontal body. The extension rod of the lifting cylinder is positioned downwards and passes through the column's horizontal body to connect to a mounting frame. A hot stamping roller is rotatably mounted on the mounting frame, horizontally positioned along the front-to-back direction of the worktable. One end of the hot stamping roller extends out of the mounting frame and is connected to a roller rotation drive motor mounted on the column via a roller rotation transmission assembly. A protective cover for covering the top and sides of the hot stamping roller is also provided on the mounting frame. The column is also equipped with a guide assembly for guiding the lifting cylinder to drive the hot stamping roller to rise and fall. The guide assembly includes two positioning plates positioned vertically opposite each other on the column's horizontal body. A first guide rod is evenly inserted around the two positioning plates, sliding longitudinally with them and evenly surrounding the lifting cylinder. The bottom of the first guide rod is connected to the mounting frame. The output terminal of the PLC controller is connected to the controlled terminals of the lifting cylinder and the hot stamping roller, respectively.

[0009] Preferably, the clamping and rotating mechanism includes a pneumatic triangular chuck rotatably mounted on a column. A fixture, horizontally positioned along the front-to-back direction of the worktable and located between three pneumatic grippers, directly below and parallel to the hot stamping roller, is used to support the cylinder from inside. The rear shaft of the pneumatic triangular chuck, away from the fixture, passes through the column and is rotatably assembled with it. A cylinder rotation drive motor mounted on the column is connected via a second rotary transmission assembly. The output of the PLC controller is connected to the controlled terminals of the pneumatic triangular chuck and the cylinder rotation drive motor, respectively.

[0010] Preferably, the film-laying mechanism includes a film-laying frame erected on the right side of the template. An active film-laying roller and several film-laying guide rollers arranged horizontally and rotatably on the film-laying frame are provided. One end of the active film-laying roller is connected to a film-laying drive motor arranged on the film-laying frame through a film-laying transmission assembly. The controlled end of the film-laying drive motor is connected to the output end of the PLC controller.

[0011] Preferably, the tracking and positioning mechanism includes a clamping seat clamped on the film feeding frame, a second guide rod arranged parallel to the film feeding guide roller and located below the film feeding guide roller to guide the film material, and a tracking and positioning sensor arranged on the second guide rod to track and position the film material from one side, the output end of the tracking and positioning sensor being connected to the input end of the PLC controller.

[0012] Preferably, the film taking mechanism includes a film taking frame erected on the left side of the template. The film taking frame is horizontally rotatably equipped with an active film taking roller and several film taking guide rollers arranged parallel to the active film taking roller. One end of the active film taking roller is connected to a film taking drive motor mounted on the film taking frame through a film taking transmission assembly. The controlled end of the film taking drive motor is connected to the output end of the PLC controller.

[0013] Preferably, the circumferential measuring mechanism includes a lead screw arranged parallel to the active take-up roller and rotatably mounted on the take-up frame. A third guide rod connected to the take-up frame is arranged parallel to one side of the lead screw. A translation seat is provided on the lead screw nut of the lead screw and slidably assembled with the third guide rod. One end of the lead screw is connected to a translation drive motor through a translation transmission assembly. A curved rod with its bottom rotatably connected to the translation seat is erected on the side of the translation seat near the clamping and rotating mechanism. A measuring wheel and a rotary encoder connected to the measuring wheel are provided on the top of the curved rod extending towards the clamping and rotating mechanism, and the measuring wheel is rotatably connected to the curved rod. A measuring wheel drive cylinder is hinged on the side of the translation seat away from the clamping and rotating mechanism. The telescopic rod of the measuring wheel drive cylinder is hinged to the curved rod. The input end of the PLC controller is connected to the output end of the rotary encoder, and the output end of the PLC controller is connected to the controlled ends of the translation drive motor and the measuring wheel drive cylinder, respectively.

[0014] Due to the adoption of the above technical solutions, the technological progress achieved by this utility model is as follows.

[0015] This invention enables the production and film application of cylindrical drums through a heat transfer mechanism and a clamping and rotating mechanism; the circumference measuring mechanism provides real-time data feedback, supporting rapid switching between cylindrical drums of different sizes; and the tracking and positioning mechanism, linked with the heat transfer mechanism, ensures that the film material is free from offset and air bubbles, resulting in a tight fit and improved film application quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the rotary drive mechanism of this utility model; Figure 3 This is a schematic diagram of the clamping and rotating mechanism of this utility model.

[0017] The components include: 1. Chassis, 2. Workbench, 3. Corner plate, 4. Rotary drive mechanism, 41. Rotary seat, 42. Planetary reducer, 43. Corner plate rotary drive motor, 5. Electric guide rail, 6. Template, 7. Column, 8. Heat transfer mechanism, 81. Lifting cylinder, 82. Mounting bracket, 83. Hot stamping roller, 84. Protective cover, 85. Guide assembly, 851. Positioning plate, 852. First guide rod, 9. Clamping and rotating mechanism, 91. Barrel rotary drive motor, 92. Pneumatic triangular chuck, 93. Fixture, 10. Film release mechanism. Mechanism, 101. Film feeding frame, 102. Active film feeding roller, 103. Film feeding guide roller, 11. Film taking-up mechanism, 111. Film taking-up frame, 112. Active film taking-up roller, 113. Film taking-up guide roller, 12. Tracking and positioning mechanism, 121. Clamping seat, 122. Second guide rod, 123. Tracking and positioning sensor, 13. Circumferential measuring mechanism, 131. Lead screw, 132. Third guide rod, 133. Measuring wheel drive cylinder, 134. Crank rod, 135. Measuring wheel, 136. Rotary encoder, 14. PLC controller. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] A heat transfer printing machine for film application in cylindrical drum production, combined with Figure 1 As shown, the system includes a chassis with a worktable 2 mounted on it. A corner plate 3 is rotatably mounted on the worktable 2, and a template 6 that can move horizontally along the front-back direction of the corner plate 3 is mounted on the corner plate 3. A film feeding mechanism 10 and a film receiving mechanism 11 are arranged opposite each other on both sides of the template 6, and the film feeding mechanism 10 and the film receiving mechanism 11 are used to pull and guide the film material. A column 7 is erected on the worktable 2, located behind the corner plate 3. A clamping and rotating mechanism 9 and a heat transfer mechanism 8 are mounted on the column 7. The clamping and rotating mechanism 9 is located between the film feeding mechanism 10 and the film receiving mechanism 11, and is used to fix the cylinder and drive the cylinder to rotate. The heat transfer mechanism 8 is located above the clamping and rotating mechanism 9, and is used to perform heat transfer film application on the cylinder. A tracking and positioning mechanism 12 is provided on the film feeding mechanism 10, and the tracking and positioning mechanism 12 is used to track and position the film material. The film receiving mechanism 11 is equipped with a circumference measuring mechanism 13, which is used to measure the circumference data of the cylinder. A PLC controller 14 is also installed on the column 7. The input terminals of the PLC controller 14 are connected to the output terminals of the tracking and positioning mechanism 12 and the circumference measuring mechanism 13, respectively. The output terminals of the PLC controller 14 are connected to the controlled terminals of the corner plate 3, template 6, film feeding mechanism 10, film receiving mechanism 11, clamping and rotating mechanism 9, and heat transfer mechanism 8, respectively. The PLC controller 14 is used to automatically control the heat transfer film application process on the cylinder.

[0020] The corner plate 3 is connected to a rotary drive mechanism 4, which drives the corner plate 3 to rotate. Figure 2 As shown, the rotary drive mechanism 4 includes a rotary seat 41 rotatably connected to the worktable 2. The top of the rotary seat 41 is connected to the bottom of the corner plate 3. The bottom of the rotary seat 41 passes through the housing 1 and is connected to a planetary reducer 42 through a first rotary transmission assembly. The input end of the planetary reducer 42 is connected to a corner plate rotary drive motor 43. When the corner plate rotary drive motor 43 drives the planetary reducer 42 to rotate, the planetary reducer 42 drives the rotary seat 41 to rotate through the first rotary transmission assembly. The rotation of the rotary seat 41 drives the corner plate 3 to rotate, thereby adjusting the position of the template 6 to switch the film application stage (such as initial positioning, film application, and post-film application finishing).

[0021] Two electric guide rails 5 are arranged opposite each other on both sides of the corner plate 3, respectively, along the front and back directions of the corner plate 3. The bottom of the template 6 is connected to the sliders of the two electric guide rails 5. The electric guide rails 5 drive the template 6 to move along the front and back directions of the corner plate 3. When it is necessary to compensate for edge errors or adjust the pattern to align with the cylinder during the film application process, the template 6 can be moved to a precise position by driving the electric guide rails 5.

[0022] The column 7 is inverted L-shaped. The heat transfer mechanism 8 includes a lifting cylinder 81 mounted on the horizontal body of the column 7. The telescopic rod of the lifting cylinder 81 is set downward and passes through the horizontal body of the column 7 to connect to a mounting frame 82. A hot stamping roller 83 is rotatably mounted on the mounting frame 82 and is horizontally arranged along the front-back direction of the worktable 2. One end of the hot stamping roller 83 extends out of the mounting frame 82 and is connected to a roller rotation drive motor mounted on the column 7 through a roller rotation transmission assembly. A protective cover 84 is also provided on the mounting frame 82 to cover the top and sides of the hot stamping roller 83. The column 7 is also equipped with a guide assembly 85, which guides the lifting cylinder 81 to drive the hot stamping roller 83 to rise and fall. Specifically, the guide assembly 85 includes two positioning plates 851 arranged vertically opposite each other on the horizontal body of the column 7. First guide rods 852 are evenly inserted around the two positioning plates 851. The first guide rods 852 are longitudinally slidably assembled with the two positioning plates 851 and evenly surround the lifting cylinder 81. The bottom of the first guide rods 852 is connected to the mounting bracket 82. When the lifting cylinder 81 drives the hot stamping roller 83 to move downward, the guide assembly 85 ensures stable vertical movement, ensuring that the hot stamping roller 83 accurately presses the film onto the cylinder. At the same time, the protective cover 84 protects the hot stamping roller 83 from external interference and prevents heat loss and high temperature hazards.

[0023] like Figure 3As shown, the clamping and rotating mechanism 9 includes a pneumatic triangular chuck 92 rotatably mounted on the column 7. A fixture 93, horizontally positioned along the front-rear direction of the worktable 2, is located at the center of the pneumatic triangular chuck 92. The fixture 93 is situated between the three pneumatic grippers of the pneumatic triangular chuck 92 and is located directly below and parallel to the hot stamping roller 83. The fixture 93 is used to support the cylinder from inside the cylinder. The rear shaft of the pneumatic triangular chuck 92, away from the fixture 93, passes through the column 7 and is rotatably assembled with the column 7. A cylinder rotation drive motor 91 is connected to the shaft via a second rotary transmission assembly. The cylinder rotation drive motor 91 is mounted on the column 7. When in use, the cylindrical barrel is placed on the fixture 93, and the pneumatic triangular chuck 92 clamps the barrel radially from the outside. The fixture 93 supports it from the inside. The barrel rotation drive motor 91 drives the pneumatic triangular chuck 92 to hold the barrel and rotate it at a low and uniform speed through the second rotation transmission component. During the rotation, the double clamping inside and outside ensures high concentricity, which can ensure rotational stability and avoid deformation or slippage when applying the film.

[0024] The film feeding mechanism 10 includes a film feeding frame 101 erected on the right side of the template 6. An active film feeding roller 102 and several film feeding guide rollers 103 arranged horizontally and rotatably on the film feeding frame 101 are mounted on the frame 101. One end of the active film feeding roller 102 is connected to a film feeding drive motor via a film feeding transmission assembly. The film feeding drive motor is mounted on the film feeding frame 101. When the film feeding drive motor drives the active film feeding roller 102 to rotate via the film feeding transmission assembly, the active film feeding roller 102 causes the film material to be released unidirectionally. The film feeding guide rollers 103 straighten the path of the film material behind the active film feeding roller 102, allowing the film material to enter horizontally between the hot stamping roller 83 and the cylindrical container on the die 93.

[0025] The film taking-up mechanism 11 includes a film taking-up frame 111 erected on the left side of the template 6. A drive taking-up roller 112 and several take-up guide rollers 113 arranged parallel to the drive taking-up roller 112 are horizontally rotatably mounted on the take-up frame 111. One end of the drive taking-up roller 112 is connected to a take-up drive motor via a take-up transmission assembly. The take-up drive motor is mounted on the take-up frame 111. When the take-up drive motor drives the drive taking-up roller 112 to rotate via the take-up transmission assembly, the drive taking-up roller 112 drives the film material to take up in one direction. The take-up guide rollers 113 straighten the path of the film material in front of the drive taking-up roller 112 and cooperate with the unloading guide rollers 103 to ensure that the film material is horizontally positioned between the hot stamping roller 83 and the cylinder on the die 93. Simultaneously, the take-up drive motor and the unloading drive motor cooperate to ensure the tension of the film material.

[0026] The tracking and positioning mechanism 12 includes a clamping seat 121 clamped on the film feeding frame 101. A second guide rod 122 is provided on the clamping seat 121 and is arranged parallel to the film feeding guide roller 103. The second guide rod 122 is located below the film feeding guide roller 103 to guide the film material. A tracking and positioning sensor 123 is provided on the second guide rod 122. The tracking and positioning sensor 123 detects the position of the film material pattern or mark point in real time from one side of the film material to track and position the film material, thereby collecting offset data and triggering film feeding speed correction or template 6 compensation movement, thereby ensuring that the film material pattern is strictly aligned with the position of the cylinder, which is especially suitable for high-speed continuous film application.

[0027] The circumferential measuring mechanism 13 includes a lead screw 131 arranged parallel to the active take-up roller 112 and rotatably mounted on the take-up frame 111. A third guide rod 132, connected to the take-up frame 111, is arranged parallel to one side of the lead screw 131. A translation seat, slidably assembled with the third guide rod 132, is mounted on the lead screw nut of the lead screw 131. One end of the lead screw 131 is connected to a translation drive motor via a translation transmission assembly. A curved rod 134, whose bottom is rotatably connected to the translation seat, is erected on the side of the translation seat near the clamping and rotating mechanism 9. A measuring wheel 135 and a rotary encoder 136 are provided on the top of the curved rod 134 extending towards the clamping and rotating mechanism 9. The measuring wheel 135 is rotatably connected to the curved rod 134, and the rotary encoder 136 is connected to the measuring wheel 135. A measuring wheel drive cylinder 133 is hinged to the side of the translation seat away from the clamping and rotating mechanism 9. The telescopic rod of the measuring wheel drive cylinder 133 is hinged to the curved rod 134. In use, the translation drive motor drives the translation seat to carry the measuring wheel 135 to scan along the circumference of the cylinder via the lead screw 131. The rotary encoder 136 records the wheel diameter movement distance and calculates the circumference data. At the same time, the measuring wheel drive cylinder 133 adjusts the tilt angle of the crank 134 to adapt to the change in the cylinder diameter. The obtained circumference data is used to adjust the heat transfer time and the pressure of the hot stamping roller 83 to ensure complete pattern adhesion.

[0028] The input terminal of the PLC controller 14 is connected to the output terminal of the tracking and positioning sensor 123 and the rotary encoder 136 respectively; the output terminal of the PLC controller 14 is connected to the controlled terminal of the corner plate rotary drive motor 43, electric guide rail 5, lifting cylinder 81, rubber roller rotary drive motor, hot stamping rubber roller 83, pneumatic triangular chuck 92, barrel rotary drive motor 91, film feeding drive motor, film taking drive motor, translation drive motor and measuring wheel drive cylinder 133 respectively.

[0029] In use, the present invention first fixes the cylindrical barrel by the clamping and rotating mechanism 9. The translation drive motor drives the measuring wheel 135 to move to a suitable position, the measuring wheel drive cylinder 133 extends, and the measuring wheel 135 contacts the surface of the cylindrical barrel. The rotary encoder 136 samples the diameter and transmits it to the PLC controller 14. The PLC controller 14 calculates the optimized film application parameters (such as heat transfer temperature and pressure), and adjusts the height of the hot stamping roller 83, the angle of the corner plate 3, and the front and rear positions of the template 6. Then, the film receiving mechanism 11 continuously pulls the waste material, and the film releasing mechanism 10 releases the film material synchronously. The tracking and positioning sensor 123 monitors the position of the film material in real time. Once an offset is detected, the PLC controller 14 instructs the film releasing drive motor and the film receiving drive motor to adjust their speeds or... The corner plate 3 rotates to correct the orientation of the template 6 or the electric guide rail 5 adjusts the front and rear positions of the template 6. Next, the pneumatic triangular chuck 92 clamps the cylinder, the cylinder rotation drive motor 91 starts, and drives the cylinder to rotate at a constant speed. The lifting cylinder 81 presses down the hot stamping roller 83 to contact the film surface. The heat on the surface of the hot stamping roller 83 activates the adhesive layer of the film. Under the rotation of the hot stamping roller 83 and the cylinder, the complete pattern transfer is completed. At the same time, the circumferential measuring mechanism 13 continuously monitors the surface quality of the cylinder. If bubbles or wrinkles are identified, the PLC controller 14 immediately optimizes the next film application path and parameters. If the diameter of the cylinder changes, the circumferential measuring mechanism 13 refits. Finally, the film application is completed, the clamping and rotating mechanism 9 is released, the corner plate 3 returns to its position, and the next cylinder is loaded to repeat the process.

Claims

1. A heat transfer printing machine for laminating film onto cylindrical containers, comprising a machine housing (1) and a worktable (2) mounted on the machine housing (1), characterized in that: A corner plate (3) is rotatably mounted on the workbench (2). A template (6) that can move horizontally along the front-back direction of the corner plate (3) is mounted on the corner plate (3). A film feeding mechanism (10) and a film receiving mechanism (11) for pulling and guiding the film material are arranged opposite to each other on both sides of the template (6). A column (7) is erected on the workbench (2) behind the corner plate (3). A clamping and rotating mechanism (9) for fixing the cylinder and driving the cylinder to rotate is mounted on the column (7). A heat transfer mechanism (8) for heat transfer film application on the cylinder is located above the clamping and rotating mechanism (9). The film feeding mechanism (10) is equipped with a tracking and positioning mechanism (12) for tracking and positioning the film material, and the film receiving mechanism (11) is equipped with a circumference measuring mechanism (13) for measuring the circumference data of the cylinder; the column (7) is also equipped with a PLC controller (14) for automatic control, the input end of the PLC controller (14) is connected to the output end of the tracking and positioning mechanism (12) and the circumference measuring mechanism (13) respectively, and the output end of the PLC controller (14) is connected to the controlled end of the corner plate (3), the template (6), the film feeding mechanism (10), the film receiving mechanism (11), the clamping and rotating mechanism (9) and the heat transfer mechanism (8) respectively.

2. The heat transfer printing machine for film application in cylindrical drum production according to claim 1, characterized in that: The corner plate (3) is connected to a rotary drive mechanism (4) for driving the corner plate (3) to rotate. The rotary drive mechanism (4) includes a rotary seat (41) that is rotatably connected to the worktable (2). The top of the rotary seat (41) is connected to the bottom of the corner plate (3). The bottom of the rotary seat (41) passes through the housing (1) and is connected to a planetary reducer (42) through a first rotary transmission assembly. The input end of the planetary reducer (42) is connected to a corner plate rotary drive motor (43). The controlled end of the corner plate rotary drive motor (43) is connected to the output end of the PLC controller (14).

3. A heat transfer printing machine for film application in cylindrical drum production according to claim 1, characterized in that: Two electric guide rails (5) are respectively arranged on the front and back directions of the corner plate (3) on both sides. The bottom of the template (6) is connected to the slider of the two electric guide rails (5). The controlled end of the electric guide rail (5) is connected to the output end of the PLC controller (14).

4. A heat transfer printing machine for film application in cylindrical drum production according to claim 1, characterized in that: The column (7) is inverted L-shaped. The heat transfer mechanism (8) includes a lifting cylinder (81) mounted on the horizontal body of the column (7). The telescopic rod of the lifting cylinder (81) is set downward and passes through the horizontal body of the column (7) to connect to a mounting frame (82). A hot stamping roller (83) is rotatably mounted on the mounting frame (82) and is horizontally arranged along the front-back direction of the worktable (2). One end of the hot stamping roller (83) extends out of the mounting frame (82) and is connected to a roller rotation drive motor mounted on the column (7) through a roller rotation transmission assembly. A protective cover (84) is also provided on the mounting frame (82) to cover the top and sides of the hot stamping roller (83). The column (7) The upper part is also provided with a guide assembly (85) for guiding the lifting cylinder (81) to drive the hot stamping roller (83) to lift. The guide assembly (85) includes two positioning plates (851) arranged opposite each other on the horizontal body of the column (7). The two positioning plates (851) are evenly provided with a first guide rod (852) that slides longitudinally with the two positioning plates (851) and is evenly arranged around the lifting cylinder (81). The bottom of the first guide rod (852) is connected to the mounting frame (82). The output end of the PLC controller (14) is connected to the lifting cylinder (81), the roller rotation drive motor and the controlled end of the hot stamping roller (83) respectively.

5. A heat transfer printing machine for film application in cylindrical drum production according to claim 4, characterized in that: The clamping and rotating mechanism (9) includes a pneumatic triangular chuck (92) rotatably mounted on the column (7). The center of the pneumatic triangular chuck (92) is provided with a fixture (93) that is horizontally arranged along the front-back direction of the worktable (2), located between three pneumatic grippers, directly below the hot stamping roller (83), and parallel to the hot stamping roller (83), for supporting the cylinder from inside the cylinder. The rear shaft of the pneumatic triangular chuck (92) away from the fixture (93) passes through the column (7) and is rotatably assembled with the column (7). It is connected to a cylinder rotation drive motor (91) mounted on the column (7) through a second rotation transmission assembly. The output end of the PLC controller (14) is connected to the controlled end of the pneumatic triangular chuck (92) and the cylinder rotation drive motor (91), respectively.

6. A heat transfer printing machine for film application in cylindrical drum production according to claim 1, characterized in that: The film feeding mechanism (10) includes a film feeding frame (101) erected on the right side of the template (6). The film feeding frame (101) is horizontally rotatably equipped with an active film feeding roller (102) and several film feeding guide rollers (103) arranged parallel to the active film feeding roller (102). One end of the active film feeding roller (102) is connected to a film feeding drive motor arranged on the film feeding frame (101) through a film feeding transmission assembly. The controlled end of the film feeding drive motor is connected to the output end of the PLC controller (14).

7. A heat transfer printing machine for laminating film in cylindrical drum production according to claim 6, characterized in that: The tracking and positioning mechanism (12) includes a clamping seat (121) clamped on the film feeding frame (101). The clamping seat (121) is provided with a second guide rod (122) which is parallel to the film feeding guide roller (103) and located below the film feeding guide roller (103) to guide the film material. The second guide rod (122) is provided with a tracking and positioning sensor (123) for tracking and positioning the film material from one side. The output end of the tracking and positioning sensor (123) is connected to the input end of the PLC controller (14).

8. A heat transfer printing machine for laminating film in cylindrical drum production according to claim 1, characterized in that: The film taking mechanism (11) includes a film taking frame (111) erected on the left side of the template (6). The film taking frame (111) is horizontally rotatably equipped with an active film taking roller (112) and several film taking guide rollers (113) arranged parallel to the active film taking roller (112). One end of the active film taking roller (112) is connected to a film taking drive motor arranged on the film taking frame (111) through a film taking transmission assembly. The controlled end of the film taking drive motor is connected to the output end of the PLC controller (14).

9. A heat transfer printing machine for laminating film in cylindrical drum production according to claim 8, characterized in that: The circumferential measuring mechanism (13) includes a lead screw (131) arranged parallel to the active take-up roller (112) and rotatably mounted on the take-up frame (111). A third guide rod (132) connected to the take-up frame (111) is arranged parallel to one side of the lead screw (131). A translation seat is provided on the lead screw nut of the lead screw (131) and slidably assembled with the third guide rod (132). One end of the lead screw (131) is connected to a translation drive motor through a translation transmission assembly. A curved rod (134) with its bottom rotatably connected to the translation seat is erected on the side of the translation seat near the clamping and rotating mechanism (9). The top of the curved rod (134) faces the clamping and rotating mechanism (9). A measuring wheel (135) and a rotary encoder (136) connected to the measuring wheel (135) are provided in the direction of the rotating mechanism (9), and the measuring wheel (135) is rotatably connected to the crank (134); a measuring wheel drive cylinder (133) is hinged on the side of the translation seat away from the clamping rotating mechanism (9), and the telescopic rod of the measuring wheel drive cylinder (133) is hinged to the crank (134); the input end of the PLC controller (14) is connected to the output end of the rotary encoder (136), and the output end of the PLC controller (14) is connected to the control end of the translation drive motor and the measuring wheel drive cylinder (133) respectively.

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