Device for solving the problem of shrinkage of plastic film in the upper and lower pattern alignment unit of bag making machine

Abstract

This utility model discloses a device for solving the shrinkage problem of the plastic film in the upper and lower pattern alignment unit of a bag-making machine. It is used to guide the printed film output from the folding mechanism to the heat-sealing device, and includes a frame, an output roller assembly, a first traction path, and a controller. The frame is disposed between the folding mechanism and the heat-sealing device. The output roller assembly is mounted on the frame adjacent to the heat-sealing device. The first traction path, arranged along the extension direction of the frame, includes a plurality of first idler rollers, a first tension buffer device, a first servo power source, and a first step sensor. The controller is electrically connected to the first servo power source and the first step sensor. With the above components, the printed film travels along the first traction path, and the first step sensor is positioned in the motion zone where the printed film physically recovers, avoiding sensing errors caused by the stretching of the printed film.

Description

Technical Field

[0001] This utility model relates to the technical field of processing equipment, and in particular to a device for solving the problem of shrinkage of the plastic film in the upper and lower pattern alignment unit of a bag making machine. Background Technology

[0002] In terms of packaging bag (stand-up pouch) manufacturing, in order to accelerate production capacity and reduce labor costs, most have entered the automated processing mode to obtain rapid manufacturing efficiency.

[0003] It is known that the implementation forms of packaging bag (stand-up pouch) manufacturing equipment generally include the following two types, such as... Figures 4 to 6 As shown.

[0004] First embodiment: Fold a large sheet of printed film A in half, and then heat seal the folded printed film A1.

[0005] The second embodiment further involves cutting the folded printed film A1 into independent upper and lower printed films A11 and A12, then overlapping the upper and lower printed films A11 and A12 and heat-sealing them. A brief description of the specific operation is as follows:

[0006] First implementation example Figure 4 , 6 As shown, the automated bag-making equipment generally includes the following parts: a folding mechanism 91 for forming a folded printed film A1 from a printed film A, an alignment mechanism 92 for aligning and conveying the folded printed film A1, and a heat-sealing device 93 for sealing the folded printed film A1 into a packaging bag.

[0007] The processing flow of its automated bag making equipment is briefly described as follows: First, the folding mechanism 91 continuously and uniformly pulls the printed film A, and folds the printed film A with the positioning pattern A01 in half along the middle to form the folded printed film A1. Through the first path movement provided by the alignment mechanism 92, the folded printed film A1 is fed to the rear heat sealing device 93 in a stepping manner by the first servo 921 and processed and sealed at a specific position on the folded printed film A1 to complete the packaging bag.

[0008] Second implementation example Figure 5 , 6 As shown, the automated bag-making equipment generally includes the following parts: a folding mechanism 91 for forming a folded printed film A1, a cutting mechanism 94 for cutting the folded printed film A1 to form upper and lower printed films A11 and A12, an alignment mechanism 92 for aligning the cut upper and lower printed films A11 and A12, and a heat-sealing device 93 for sealing the stacked upper and lower printed films A11 and A12 into a packaging bag.

[0009] The processing flow of its automated bag-making equipment is as follows: First, the folding mechanism 91 continuously and uniformly pulls the printed film A, and folds the printed film A with the positioning pattern A01 in half along the middle to form the folded printed film A1. The cutting mechanism 94 cuts the folded printed film A1 into two independent upper and lower printed films A11 and A12. The upper and lower printed films A11 and A12 are fed to the heat sealing device 93 in a stepping manner through the first and second paths provided by the alignment mechanism 92, respectively. The heat sealing device 93 processes and seals the upper and lower printed films A11 and A12 at specific positions, thereby completing the packaging bag.

[0010] The above structure has several shortcomings in its implementation:

[0011] In the first embodiment, after the printed film A is folded by the folding mechanism 91, it extends along the first path provided by the alignment mechanism 92. During the process, the first servo 921 provides the pulling power, and with the sensing of the first sensor 931, the first servo 921 steps to deliver the folded printed film A1 to the rear heat sealing device 93.

[0012] Before the folded printed film A1 passes the first servo 921, both ends of the folded printed film A1 in its extension direction are subjected to tension in two directions, namely the folding mechanism 91 and the first servo 921, causing the folded printed film A1 to be stretched and deformed. After the folded printed film A1 passes the first servo 921, it begins to physically retract due to the loss of external tension.

[0013] Since the first sensor 931 is located at the front end of the feeding end of the first servo 921, it measures the folded printed film A1 under stress and tensile deformation. Therefore, the reference stepping process provided to the first servo 921 will result in a positional difference with the position of the folded printed film A1 entering the rear heat sealing device 93 (physical retraction).

[0014] Previously, because the printing film A was made of a single material and was folded in half as a whole sheet, the overall deformation was limited and could be overcome by the user making timely adjustments on-site. However, due to the increasing diversity of printing films A today, the deformation is constantly increasing, leading to more frequent adjustments by the user, which in turn increases labor costs and defect rates.

[0015] In addition, in the second embodiment, the folded printed film A1 is cut into independent upper and lower printed films A11 and A12 by the cutting mechanism 94, and then moves along the first and second paths provided by the automated bag making equipment. During the process, the first and second servos 921 and 922 provide pulling power to the upper and lower printed films A11 and A12 respectively, and the first and second sensors 931 and 932 sense the upper and lower printed films A11 and A12 to achieve the requirement of the first and second servos 921 and 922 to complete the step-by-step transfer of the upper and lower printed films A1 and A2. Utility Model Content

[0016] In view of the problems and deficiencies of the prior art, and under the existing machine conditions, the applicant has finally developed an improvement solution to address the stretching and deformation during the printing film traction process while minimizing costs.

[0017] The main purpose of this invention is to provide a device for solving the problem of shrinkage of the plastic film in the upper and lower pattern alignment unit of a bag making machine, and to overcome the deficiencies of previous technologies through innovative structural design.

[0018] In accordance with the aforementioned objective of this utility model, this utility model discloses a device for solving the problem of shrinkage of the plastic film in the upper and lower pattern alignment unit of a bag making machine, used to pull a pair of folded printed films output from a folding mechanism and step-transmit them to a heat sealing device, comprising:

[0019] A frame is positioned between the folding mechanism and the heat sealing device;

[0020] An output roller assembly is located on the frame adjacent to the heat sealing device assembly, guiding the folded printed film through the heat sealing device;

[0021] A first traction path, configured along the extension direction of the frame, for conveying the folded printed film to the output roller assembly, includes:

[0022] A plurality of first idler wheels are assembled at a preset position on the frame to transmit and guide the folded printed film along the first traction path;

[0023] A first tension buffer device is assembled on the frame and positioned between the folding mechanism and the first servo power to provide appropriate buffering for the folded printed film passing through.

[0024] A first servo motor, installed at a preset position on the frame, operates according to a first servo motor signal to continuously pull the folded printed film through the first tension buffer device, and outputs the folded printed film passing through the first servo motor in a step-by-step manner; and

[0025] A first-step sensor, pre-installed on the frame and positioned at the output of the first servo power, senses the folded printed film after passing through the first servo power and outputs a first sensing signal; and

[0026] A controller is electrically connected to the first servo power and the first step sensor respectively, and selectively outputs the first servo power signal according to the received first sensing signal.

[0027] This utility model provides another device for solving the shrinkage problem of the plastic film in the upper and lower pattern alignment unit of a bag making machine: a device for pulling an upper printed film and a lower printed film output from a cutting mechanism, and stepping them to a heat sealing device, including:

[0028] A frame is positioned between the cutting mechanism and the heat sealing device;

[0029] An output roller assembly is mounted on the frame adjacent to the heat sealing device assembly, guiding and stacking the upper printed film and the lower printed film through the heat sealing device;

[0030] A second traction path, disposed along the extension direction of the frame on the upper section of the frame, for conveying the printed film to the output roller assembly, includes:

[0031] A plurality of second idler wheels are assembled at a predetermined location on the frame to transmit and guide the printed film along the second traction path;

[0032] A second servo power is provided at a preset position on the upper section of the frame, corresponding to the output end of the cutting mechanism. It operates according to the second servo power signal to continuously pull the upper printing film output by the cutting mechanism and output the upper printing film passing through the second servo power in a stepping manner.

[0033] A second step sensor, pre-installed on the frame and positioned between the second servo power unit and the output roller assembly, senses the stepping motion of the printed film and outputs a second sensing signal; and

[0034] A second tension buffer device is assembled at a preset position on the upper section of the frame and positioned between the output roller assembly and the second step sensor to provide appropriate buffering for the upper printed film through which the stepping motion passes.

[0035] The aforementioned third traction path, arranged along the extension direction of the frame in the lower section of the frame, is used to transmit the printed film through the output roller assembly, including:

[0036] A plurality of third idler wheels are set at a predetermined position in the lower section of the frame to transmit and guide the lower printed film along the third traction path;

[0037] A third servo power is provided at a preset position on the lower section of the frame, corresponding to the output end of the cutting mechanism. It operates according to the third servo power signal to pull the lower printed film output by the cutting mechanism and output the lower printed film passing through the third servo power in a stepping manner.

[0038] A third step sensor, pre-installed on the frame and positioned between the third servo power unit and the output roller assembly, senses the stepping motion of the unprinted film and outputs a third sensing signal; and

[0039] A third tension buffer device, assembled at a predetermined position in the lower section of the frame and positioned between the output roller assembly and the third step sensor, is used to provide appropriate buffering for the lower printed film as it steps through; and

[0040] A controller is electrically connected to the second servo power, the third servo power, the second step sensor, and the third step sensor, respectively, and selectively outputs the second servo power signal and the third servo power signal according to the received second sensing signal and the third sensing signal.

[0041] Composed of the above components, the printed film travels along the first traction path, and the first step sensor is positioned in the motion area where the printed film physically recovers, so as to avoid the first step sensor from sensing errors due to the stretching of the printed film. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of an embodiment of the present utility model;

[0043] Figure 2 This is a schematic diagram of an embodiment of the electrical connection of the controller of this utility model;

[0044] Figure 3 This is a schematic diagram of another embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of the alignment device transmission of a bag-making machine in the previous technology (I);

[0046] Figure 5 This is a schematic diagram (II) of the alignment device transmission of a bag-making machine in the previous technology;

[0047] Figure 6 This is a schematic diagram of a printed film in a previous technique.

[0048] 100: Alignment device

[0049] 10: Rack

[0050] 121: First idler wheel

[0051] 122: First tension buffer device

[0052] 123: First Servo Power

[0053] 124: First step sensor

[0054] 141: Second idler wheel

[0055] 142: Second Servo Power

[0056] 143: Second step sensor

[0057] 144: Second tension buffer device

[0058] 161: Third idler wheel

[0059] 162: Third Servo Power

[0060] 163: Third step sensor

[0061] 164: Third tension buffer device

[0062] 20: Output roller assembly

[0063] 30: Controller

[0064] 91: Conversion Mechanism

[0065] 92: Alignment mechanism

[0066] 921: First Servo

[0067] 922: Second Servo

[0068] 93: Heat sealing device

[0069] 931: First Sensor

[0070] 932: Second Sensor

[0071] 94: Cutting Mechanism

[0072] A: Printed film

[0073] A01: Positioning Diagram

[0074] A1: Print film after folding.

[0075] A11: Printing film on the upper plate

[0076] A12: Printing film on the lower sheet

[0077] B: Bottom-folding mechanism Detailed Implementation

[0078] The following description, with reference to the accompanying drawings, further illustrates the embodiments of the device for solving the shrinkage problem of the plastic film in the upper and lower pattern alignment unit of a bag-making machine. Various objects in the embodiments are depicted according to the applicable scale, size, deformation, or displacement, rather than being drawn to the scale of actual components, as will be stated above. Furthermore, elements with identical or symmetrical arrangements in the remaining embodiments are represented by the same numbering. Additionally, directional terms such as "front," "back," "left," "right," "up," "down," "inner," and "outer" in the descriptions of the embodiments listed below are used according to the specified view direction and should not be construed as limiting the scope of this utility model.

[0079] Please see Figure 1 , 2 and Figure 6 The diagram illustrates an alignment device 100 for a bag-making machine, comprising a frame 10, an output roller group 20, a first traction path, and a controller 30. The alignment device 100 is a stepping motion of the folded printed film A1 output by the traction folding mechanism 91, moving the folded printed film A1 to the heat-sealing device 93.

[0080] The aforementioned frame 10 has a pre-defined outline and is positioned between the folding mechanism 91 and the heat sealing device 93.

[0081] The aforementioned output roller group 20 is located adjacent to the heat sealing device 93 group on the frame 10 and is positioned at the discharge end of the frame 10 along the extension direction, guiding the folded printed film A1 through to the heat sealing device 93.

[0082] The aforementioned first traction path is configured along the extension direction of the frame 10 to transmit the folded printed film A1 output by the folding mechanism 91 to the output roller group 20. It is defined by a plurality of first idler rollers 121, a first tension buffer device 122, a first servo power 123, and a first step sensor 124.

[0083] Each of the first idler wheels 121 is arranged at a preset position on the frame 10 along the first traction path to transmit and guide the folded printed film A1 to move along the first traction path.

[0084] The first tension buffer device 122 is assembled on the frame 10 and disposed adjacent to the output end of the folding mechanism 91, for receiving the folded printed film A1 output by the folding mechanism 91, and providing appropriate buffering for the folded printed film A1 that passes through it.

[0085] The first servo power 123 is installed at a preset position on the frame 10 and operates according to a first servo power signal to pull the folded printed film A1 after passing through the first tension buffer device 122, and output the folded printed film A1 passing through the first servo power 123 in a stepping manner.

[0086] The first step sensor 124 is pre-set on the frame 10 and configured after the output end of the first servo power 123. It senses the folded printed film A1 after passing through the first servo power 123, obtains the alignment pattern A01 on the folded printed film A1, and outputs the first sensing signal.

[0087] The controller 30 is electrically connected to the first servo power 123 and the first step sensor 124 respectively, and selectively outputs the first servo power signal according to the received first sensing signal.

[0088] The above is an introduction to the transmission, components and assembly method of the alignment device 100 of the bag making machine according to a preferred embodiment of the present invention. The operating features of the embodiment of the present invention will be introduced below.

[0089] Regarding how the alignment device 100 aligns the folded printed film A1, it is a well-known prior art. Generally, a guide mold is used to guide the folding mechanism 91 to output the folded printed film A1, maintaining vertical alignment during transmission. The folded printed film A1 is continuously and stably moved along the first traction path (front section) in the first section of the first servo power 123, and then moves in a stepping manner along the first traction path (rear section) after passing through the first servo power 123, passing through the output roller group 20 and reaching the heat sealing device 93.

[0090] Of course, the first traction path in the above process can also be additionally configured with punching mechanism, bottom folding mechanism B and other processes as needed, but this is not the focus of this case, so it will not be elaborated on.

[0091] To further explain the operation mode of the alignment device 100 of this utility model, the folded printed film A1 output by the folding mechanism 91 passes through the first idler wheel 121, the first tension buffer device 122, the first servo power 123, and the first step sensor 124 along the first traction path, and then passes through the output roller group 20 to the heat sealing device 93 at the rear end.

[0092] In the above process, the first step sensor 124 senses the alignment pattern A01 on the folded printed film A1 and outputs a first sensing signal to the controller 30. The controller 30 selectively outputs a first servo power signal to the first servo power 123 according to the first sensing signal, so that the first servo power 123 outputs the folded printed film A1 to move along the first traction path in a stepping manner.

[0093] The unique feature of this invention is that the first step sensor 124 is positioned after the first servo power 123 output end along the first traction path. Here, the folded printed film A1 moving along the first traction path is in the physical recovery stage and there is no risk of being stretched or deformed by force. Therefore, the first step sensor 124 can accurately obtain the alignment pattern A01 on the folded printed film A1, ensuring the feed rate of the first servo power 123 and allowing the rear heat sealing device 93 to accurately process and heat seal the folded printed film A1 at the preset position.

[0094] Furthermore, it ensures that the stretching of the printed film A1 after folding will not cause the first step sensor 124 to fail to detect the positioning pattern A01 during the action time, thus preventing equipment shutdown and other defects.

[0095] like Figure 2 , 3 As shown, in another embodiment of this utility model, a cutting mechanism 94 (previous technology) is further connected in series between the folding mechanism 91 (previous technology) and the alignment device 100. The folded printed film A1 output by the folding mechanism 91 is cut into independent upper and lower printed films A11 and A12 (previous technology), and then the upper and lower printed films A11 and A12 are respectively fed into the alignment device 100.

[0096] To facilitate the alignment of the upper and lower printed films A11 and A12, the alignment device 100 of this invention, in addition to the aforementioned frame 10, output roller group 20, and controller 30, further provides a second traction path and a third traction path. The second and third traction paths respectively guide the upper and lower printed films A11 and A12 through-feed movement and alignment, and the upper and lower printed films A11 and A12 are step-transmitted through the output roller group 20 to the heat sealing device 93.

[0097] The aforementioned frame 10 is positioned between the cutting mechanism 94 and the heat sealing device 93.

[0098] The aforementioned second traction path is arranged on the upper section of the frame 10 along the extension direction of the frame 10 to transfer the printed film A11 to the output roller group 20. It is composed of a plurality of second idler rollers 141, a second servo power 142, a second step sensor 143, and a second tension buffer device 144.

[0099] Each of the second idler wheels 141 is arranged at a preset position on the frame 10 along the second traction path to transmit and guide the upper printed film A11 to move along the second traction path.

[0100] The second servo power 142 is located at a preset position on the upper section of the frame 10, corresponding to the output end of the cutting mechanism 94, and is electrically connected to the controller 30. It operates according to a second servo power signal to pull the upper printing film A11 output by the cutting mechanism 94 and output the upper printing film A11 passing through the second servo power 142 in a stepping manner.

[0101] The second step sensor 143 is pre-set in the frame 10, positioned between the second servo power 142 (after the output end) and the output roller group 20, and electrically connected to the controller 30. It senses the upper printed film A11 transmitted by the second servo power 142 step, obtains the alignment pattern A01 of the upper printed film A11, and outputs a second sensing signal to the controller 30, so that the controller 30 selectively outputs the second servo power signal.

[0102] The second tension buffer device 144 is assembled at a preset position on the upper section of the frame 10 and positioned between the output roller group 20 and the second step sensor 143. It is used to provide appropriate buffering for the upper printing film A11 that is stepped through, so as to avoid the upper printing film A11 being overstretched or squeezed due to the asynchronous stroke with the heat sealing device 93 at the rear end.

[0103] The aforementioned third traction path is arranged along the extension direction of the frame 10 in the lower section of the frame 10 to transmit the printed film A12 output by the cutting mechanism 94 through the output roller group 20. It consists of a plurality of third idler wheels 161, a third servo power 162, a third step sensor 163, and a third tension buffer device 164.

[0104] Each of the third idler wheels 161 is arranged at a predetermined position in the lower section of the frame 10 along the third traction path to transmit and guide the lower printed film A12 to move along the third traction path.

[0105] The third servo power 162 is located at a preset position in the lower section of the frame 10, corresponding to the output end of the cutting mechanism 94, and is electrically connected to the controller 30. It operates according to a third servo power signal to pull the lower printed film A12 output by the cutting mechanism 94 and output the lower printed film A12 passing through the third servo power 162 in a stepping manner.

[0106] The third step sensor 163 is pre-set in the frame 10, positioned between the third servo power 162 (rear of the output end) and the output roller group 20, and electrically connected to the controller 30. It senses the lower printed film A12 transmitted by the third servo power 162 step, obtains the alignment pattern A01 of the lower printed film A12, and outputs a third sensing signal to the controller 30, so that the controller 30 selectively outputs the third servo power signal.

[0107] The third tension buffer device 164 is set at a preset position in the lower section of the frame 10 and is configured between the output roller group 20 and the third step sensor 163. It is used to provide appropriate buffer for the lower printed film A12 that is stepped through, so as to avoid the lower printed film A12 being overstretched or squeezed due to the asynchronous stroke with the heat sealing device 93 at the rear end.

[0108] Composed of the above components, the printed film A is first folded by the folding mechanism 91 to form the folded printed film A1, and then divided by the cutting mechanism 94 into independent upper and lower printed films A11 and A12. The upper printed film A11 is traversed along the second traction path through the second idler wheel 141, the second servo power 142, the second step sensor 143, and the second tension buffer device 144 to the output roller group 20, and then output to the heat sealing device 93 via the output roller group 20.

[0109] The lower printed film A12 then travels along the third traction path through the third idler wheel 161, the third servo power 162, the third step sensor 163, and the third tension buffer device 164 to the output roller group 20, and then aligns with the upper printed film A11 and is synchronously output to the heat sealing device 93 via the output roller group 20.

[0110] In the above process, the second and third stepping sensors 164 and 163 respectively sense the alignment pattern A01 of the upper and lower printed films A11 and A12, and output the second and third sensing signals to the controller 30 respectively. The controller 30 selectively outputs the second and third servo power signals to the second and third servo power 142 and 162 according to the second and third sensing signals, so that the second and third servo power 142 and 162 output the upper and lower printed films A11 and A12 in a stepping manner to move along the second and third traction paths respectively, and overlap and align at the output roller group 20, so that the back-end heat sealing device 93 can accurately process the heat sealing.

[0111] In the above operation, the second and third stepping sensors 164 and 163 are respectively configured after the output ends of the second and third servo power 142 and 162. At this point, the upper and lower printed films A11 and A12 are in the physical recovery stage and there is no risk of being stretched and deformed by force. Therefore, the second and third stepping sensors 164 and 163 can accurately obtain the alignment pattern A01 of the upper and lower printed films A11 and A12, ensuring the feed rate of the second and third servo power 142 and 162, so that the back-end heat sealing device 93 can accurately process and heat seal the upper and lower printed films A11 and A12 according to the preset position.

[0112] The above description is only a preferred embodiment of the present utility model and is intended to clarify the features of the present utility model. It is not intended to limit the scope of the embodiments of the present utility model. Equivalent changes made by those skilled in the art based on the present utility model, as well as changes known to those skilled in the art, should still fall within the scope of the present utility model.

Claims

1. A device for solving the shrinkage problem of plastic film in the upper and lower pattern alignment unit of a bag making machine, used to pull a pair of folded printed films output from a folding mechanism and step-transfer them to a heat sealing device, characterized in that, include: A frame is positioned between the folding mechanism and the heat sealing device; An output roller assembly is located on the frame adjacent to the heat sealing device assembly, guiding the folded printed film through the heat sealing device; A first traction path, configured along the extension direction of the frame, for conveying the folded printed film to the output roller assembly, includes: A plurality of first idler wheels are set at a predetermined location on the frame to transmit and guide the folded printed film along the first traction path; A first tension buffer device is assembled on the frame and positioned between the folding mechanism and the first servo power to provide appropriate buffering for the folded printed film passing through. A first servo motor, installed at a preset position on the frame, operates according to a first servo motor signal to continuously pull the folded printed film through the first tension buffer device, and outputs the folded printed film passing through the first servo motor in a step-by-step manner; and A first-step sensor, pre-installed on the frame and positioned at the output of the first servo power, senses the folded printed film after passing through the first servo power and outputs a first sensing signal; and A controller is electrically connected to the first servo power and the first step sensor respectively, and selectively outputs the first servo power signal according to the received first sensing signal.

2. A device for solving the shrinkage problem of plastic film in the upper and lower pattern alignment unit of a bag making machine, used to pull an upper printed film and a lower printed film output from a cutting mechanism, and step them to a heat sealing device, characterized in that, include: A frame is positioned between the cutting mechanism and the heat sealing device; An output roller assembly is mounted on the frame adjacent to the heat sealing device assembly, guiding and stacking the upper printed film and the lower printed film through the heat sealing device; A second traction path, disposed along the extension direction of the frame on the upper section of the frame, for conveying the printed film to the output roller assembly, includes: A plurality of second idler wheels are assembled at a predetermined location on the frame to transmit and guide the printed film along the second traction path; A second servo power is provided at a preset position on the upper section of the frame, corresponding to the output end of the cutting mechanism. It operates according to the second servo power signal to continuously pull the upper printing film output by the cutting mechanism and output the upper printing film passing through the second servo power in a stepping manner. A second step sensor, pre-installed on the frame and positioned between the second servo power unit and the output roller assembly, senses the stepping motion of the printed film and outputs a second sensing signal; and A second tension buffer device is assembled at a preset position on the upper section of the frame and positioned between the output roller assembly and the second step sensor to provide appropriate buffering for the upper printed film through which the stepping motion passes. A third traction path, disposed along the lower section of the frame in the extension direction of the frame, is used to transfer the printed film through the output roller assembly, including: A plurality of third idler wheels are set at a predetermined position in the lower section of the frame to transmit and guide the lower printed film along the third traction path; A third servo power is provided at a preset position on the lower section of the frame, corresponding to the output end of the cutting mechanism. It operates according to the third servo power signal to pull the lower printed film output by the cutting mechanism and output the lower printed film passing through the third servo power in a stepping manner. A third step sensor, pre-installed on the frame and positioned between the third servo power unit and the output roller assembly, senses the stepping motion of the unprinted film and outputs a third sensing signal; and A third tension buffer device, assembled at a predetermined position in the lower section of the frame and positioned between the output roller assembly and the third step sensor, is used to provide appropriate buffering for the lower printed film as it steps through; and A controller is electrically connected to the second servo power, the third servo power, the second step sensor, and the third step sensor, respectively, and selectively outputs the second servo power signal and the third servo power signal according to the received second sensing signal and the third sensing signal.

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