Positioning printing flexible package structure and process thereof

Abstract

The invention discloses a flexible package positioning printing structure and technology, and belongs to the technical field of flexible package printing, the flexible package positioning printing structure comprises a comprehensive treatment platform, a printing conveyor and a ten-color printing machine arranged above the printing conveyor, the bottom of the comprehensive treatment platform is provided with a driving motor, and the top of the comprehensive treatment platform is provided with a rotary feeding piece; a center shaft of the bottom of the rotary feeding piece is connected with an output shaft of the driving motor, and color spraying equipment and vacuum aluminum plating equipment are installed at the top of the comprehensive treatment platform through height adjusting frames and used for color spraying and vacuum aluminum plating when the rotary feeding piece moves to the lower portion. The top of the comprehensive treatment platform is further provided with an auxiliary feeding and processing assembly through a fixing frame, the auxiliary feeding and processing assembly is used for automatic feeding and processing of a shielding frame, a laser aluminizing transfer film and heat transfer printing paper of the color spraying equipment, and 18-color printing is achieved through the structure, meanwhile, the cost is low, the automation degree is high, and the automatic printing equipment is suitable for flow line production and has the high application value.

Description

Technical Field

[0001] The invention relates to the technical field of printed flexible packaging, in particular to a positioning printed flexible packaging structure and a process thereof. Background Art

[0002] Due to the limitation of equipment and technology, the normal printing color of the flexible packaging industry is limited to 10 colors. Because of the number of colors, many designs are also limited, and patterns that are too complex cannot be designed. If there are complex designs with more than 10 colors, communication and color merging are required, and the customer's design needs to be replanned. This is a technical problem that is tacitly accepted in the industry. The customer's complex and novel designs or patterns similar to actual photography cannot be used for flexible packaging printing, which limits the pattern and appearance design of the flexible packaging, and the customer's design can only compromise with the actual color separation.

[0003] The existing equipment has a maximum of 10 colors for plastic products and 9 colors for paper printing. At present, in order to increase the number of colors, the printing press color group is used to solve the problem, but the maximum is 16 colors, and the cost of the printing press also increases accordingly, with a price of tens of millions. Its loss is also the reason why many customers and enterprises cannot use it. According to the general situation in the industry, the printing loss and adjustment of the machine increase the loss by 100-300m for each additional color group, and the time increases by 20 minutes. In this way, even if a 16-color printing press is used, the gain does not outweigh the loss. In view of this, this application is proposed. Summary of the invention

[0004] To this end, the present invention provides a positioning printing flexible packaging structure and a process thereof to solve the above-mentioned problems.

[0005] The present invention provides the following technical solutions: a positioning printing soft packaging structure, comprising an integrated processing platform, a printing conveyor and a ten-color printing machine arranged above the printing conveyor, wherein a driving motor is installed at the bottom of the integrated processing platform, and a rotating feeding piece is arranged at the top of the integrated processing platform, and the bottom center axis of the rotating feeding piece is connected to the output shaft of the driving motor. A color spraying device and a vacuum aluminum plating device are respectively installed at the top of the integrated processing platform through a height adjustment frame, which are respectively used for color spraying and vacuum aluminum plating when the rotating feeding piece moves to the bottom; an auxiliary feeding and processing component is also installed at the top of the integrated processing platform through a fixed frame, which is used for automatic feeding and processing of a shielding frame of the color spraying equipment, a laser aluminum plating transfer film and a thermal transfer paper.

[0006] As a preferred solution of the present invention, the rotating feeding part includes a rotating base whose bottom is connected to the output shaft of the driving motor. A square processing groove for placing the soft package to be processed is opened on one side of the top of the rotating base. The soft package to be printed is placed in the processing groove. The rotating base is driven to rotate by turning on the driving motor, and then the soft package is driven to move, and is moved to the bottom of each processing structure in turn for processing. No manual operation is required, and the automation and safety are relatively high.

[0007] As a preferred solution of the present invention, a micro-electric push rod is embedded in the processing groove, and a push bar is fixed on the telescopic end of the micro-electric push rod. After the soft package to be processed is sprayed, laser aluminum transferred and thermally transferred, it is pushed onto the printing conveyor and sent to the ten-color printing machine for final printing.

[0008] As a preferred solution of the present invention, the auxiliary loading assembly includes a T-shaped bracket, and a coloring groove, a transfer film loading groove and a thermal transfer paper loading groove are respectively opened above the three ends of the T-shaped bracket. The coloring groove is used for placing and transferring the shielding frame of the inkjet equipment, the transfer film loading groove is used for placing the laser aluminum-plated transfer film, and the thermal transfer paper loading groove is used for placing the thermal transfer paper.

[0009] As a preferred solution of the present invention, a movable frame for placing a shielding frame is slidably installed in the coloring groove, and a screw control component connected to the movable frame and used for controlling the position adjustment of the movable frame is installed in the coloring groove. A limit rod is also fixedly arranged in the coloring groove and corresponds to the position of the screw control component and is slidably arranged in the movable frame. The position of the limit rod is symmetrical to the screw to maintain the stability of the movable frame.

[0010] As a preferred solution of the present invention, the screw control component includes a micro motor fixed at one end of the inner wall of the coloring trough and a screw connected to the output shaft of the micro motor, one end of the screw is rotatably connected to the side wall of the coloring trough, the movable frame is threadedly connected to the screw, the micro motor is turned on to control the rotation of the screw, and the threaded structure is used to push the movable frame connected thereto to move, so as to adjust the position of the shielding frame, and shield the dye sprayed by the color spraying equipment through the shielding frame to form a specific pattern.

[0011] As a preferred solution of the present invention, the symmetrical inner walls of the transfer film loading trough and the thermal transfer paper loading trough are provided with elastic brackets, which can be retracted into the trough when subjected to external force, thereby supporting the thermal transfer paper or laser aluminum-plated transfer film and being able to retract when subjected to external force without affecting the printing work.

[0012] As a preferred solution of the present invention, a first electric telescopic rod is fixedly installed on one side of the top of the transfer film feeding trough, and the telescopic end of the first electric telescopic rod is connected to a lifting seat through a first U-shaped frame, and the lifting seat is located directly above the transfer film feeding trough, and sliding grooves are opened on symmetrical sides of the lifting seat, a self-propelled control wheel is installed in the sliding groove on one side, and a driven wheel is installed in the sliding groove on the other side, and the outer sides of the driven wheel and the automatic control wheel are rotatably connected to a pressing roller through a connecting frame, and the length of the pressing roller is the same as the width of the transfer film feeding trough. After the flexible packaging bag moves to the bottom of the vacuum aluminum plating equipment and the pressing roller, the first electric telescopic rod is controlled to retract, so that the first U-shaped frame and the lifting seat descend, and the bottom pressing roller descends accordingly to press the laser aluminum-plated transfer film onto the flexible packaging bag below, and then the self-propelled control wheel starts to move back and forth, driving the pressing roller to continuously move above the laser aluminum-plated transfer film, so that the laser aluminum-plated transfer film is tightly fitted to the flexible packaging bag.

[0013] As a preferred solution of the present invention, a second electric telescopic rod is fixedly installed on one side of the top of the thermal transfer paper feeding trough, and the telescopic end of the second electric telescopic rod is connected to a heating plate through a second U-shaped frame, the heating surface of the heating plate faces downward, and the heating surface of the heating plate is coated with a Teflon coating. After the soft packaging bag is transferred to the bottom of the thermal transfer paper feeding trough, the second electric telescopic rod is controlled to retract, so that the second U-shaped frame and the heating plate are lowered together, and the thermal transfer paper is pressed onto the soft packaging bag and then the heating plate is turned on, so that the dye on the thermal transfer paper is transferred to the soft packaging bag.

[0014] A positioning printing flexible packaging process is realized by a positioning printing flexible packaging structure, and specifically comprises the following steps: S1. Pre-place the raw materials. Place the flexible packaging bags to be printed in the processing slot of the rotating feeding part. According to the printing requirements, put the shielding frame in the moving frame in the coloring slot, put the laser aluminum transfer film in the transfer film feeding slot, put the thermal transfer paper in the thermal transfer paper feeding slot, and then preset the data to be printed on each device. S2, color spraying, control the driving motor to start and drive the rotating feeding part to rotate, move the soft packaging bag to the bottom of the color spraying device, first coat the base color through the color spraying device, then control the moving frame to move the shielding frame between the color spraying device and the bottom soft packaging bag, and then spray the second time through the color spraying device to achieve two-color printing; S3, laser aluminizing, continue to control the rotation of the rotary feeding piece to move the flexible packaging bag to the bottom of the vacuum aluminizing equipment, then control the first electric telescopic rod to retract, so that the first U-shaped frame and the lifting seat are lowered together, and the bottom pressing roller is lowered accordingly, until the laser aluminizing transfer film is pressed onto the flexible packaging bag below, and then the self-propelled control wheel starts to move back and forth, driving the pressing roller to continuously move above the laser aluminizing transfer film, so that the laser aluminizing transfer film and the flexible packaging bag are tightly fitted without bubbles and wrinkles; S4, mold pressing and heating, the rotary feeder is further rotated to make the flexible packaging bag rotate to the bottom of the thermal transfer paper feeding slot, and then the second electric telescopic rod is controlled to retract, so that the second U-shaped frame and the heating plate are lowered together, the thermal transfer paper is pressed onto the flexible packaging bag, and then the heating plate is turned on, so that the dye on the thermal transfer paper is transferred to the flexible packaging bag; S5, the printing press prints, controls the micro electric push rod to extend, controls the push bar to move, sends the flexible packaging bag in the processing tank to the printing conveyor, and then sends it to the ten-color printing press through the printing conveyor to complete the final printing.

[0015] The beneficial effects of the present invention are as follows: 1. The present invention sequentially feeds the soft packaging bags to be processed on the rotating feeding part to the bottom of the spraying equipment and the vacuum aluminum plating equipment, and cooperates with the auxiliary feeding processing components to sequentially perform 2-color spraying treatment, laser aluminum plating transfer treatment, and thermal transfer treatment on the soft packaging bags, and finally performs ten-color printing through a ten-color printer. Combining the above multiple processing methods, the ten-color printer can complete ten-color printing, the laser aluminum plating transfer film process can achieve 3-color printing, the thermal transfer technology can achieve 3-color printing, and the spraying process can achieve 2-color printing, so that the present structure can achieve 18-color printing and coloring. Compared with the existing printed soft packaging structure, the structure of the present invention can achieve 18-color printing at the same time with relatively low cost and high degree of automation, so it is suitable for assembly line production and has high application value.

[0016] 2. The 18-color positioning printing flexible packaging film and bag process of the present invention can increase 8 colors from the original 10 colors by comparing with the effect of a 16-color printing machine, and its cost is only 30-40% of that of a 16-color printing machine, achieving an increase in the number of colors and a decrease in cost, and the operability and actual process are better than the increase in the color group of the printing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the present invention from the left side viewing angle; Figure 3 It is a schematic diagram of the structure on the comprehensive processing platform of the present invention; Figure 4 It is a structural schematic diagram of the rotary feeding member in the present invention; Figure 5 It is a structural schematic diagram of the auxiliary feeding processing assembly of the present invention; Figure 6 yes Figure 5 A schematic diagram of the structure of the part near the transfer film loading trough; Figure 7 yes Figure 5 Schematic diagram of the structure of the part near the thermal transfer paper feeding trough.

[0019] Legend: 1. Comprehensive processing platform; 2. Printing conveyor; 3. Ten-color printing machine; 4. Rotary feeding part; 401. Rotating base; 402. Processing slot; 403. Pushing bar; 5. Auxiliary feeding processing assembly; 501. T-shaped bracket; 502. Coloring slot; 503. Transfer film feeding slot; 504. Thermal transfer paper feeding slot; 505. Moving frame; 506. Screw control part; 507. Elastic bracket; 508. First electric telescopic rod; 509. First U-shaped frame; 510. Lifting seat; 511. Sliding slot; 512. Self-propelled control wheel; 513. Pressing roller; 514. Second electric telescopic rod; 515. Second U-shaped frame; 516. Heating plate; 517. Teflon coating; 6. Fixed frame; 7. Color spraying equipment; 8. Vacuum aluminum plating equipment; 9. Height adjustment frame. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Specific examples are given below.

[0022] like Figure 1-Figure 7 As shown, a positioning printing soft packaging structure includes an integrated processing platform 1, a printing conveyor 2 and a ten-color printing machine 3 arranged above the printing conveyor 2. A driving motor is installed at the bottom of the integrated processing platform 1, and a rotating feeding piece 4 is arranged on the top of the integrated processing platform 1. The bottom center axis of the rotating feeding piece 4 is connected to the output shaft of the driving motor. A color spraying device 7 and a vacuum aluminum plating device 8 are installed on the top of the integrated processing platform 1 through a height adjustment frame 9, which are respectively used for color spraying and vacuum aluminum plating when the rotating feeding piece 4 moves to the bottom. An auxiliary feeding and processing component 5 is also installed on the top of the integrated processing platform 1 through a fixed frame 6, which is used for automatic feeding and processing of a shielding frame of the color spraying device 7, a laser aluminum transfer film and a thermal transfer paper.

[0023] When the structure is in use, the rotating feeding member 4 is used as a processing platform. The position of the rotating feeding member 4 can be adjusted by the driving motor, so that the soft packaging bags to be processed on the rotating feeding member 4 are sequentially fed to the bottom of the color spraying device 7 and the vacuum aluminum plating device 8. The color spraying device 7 can adopt the Ou Fuen-E-Code 900 two-color inkjet printer, and the vacuum aluminum plating device can adopt the ZD-2350 high vacuum coating machine and the Chuanggao vacuum coating device. In combination with the auxiliary feeding processing component 5, the soft packaging bags can be processed with two colors in sequence, and the laser aluminum plating transfer process can be performed. Processing, thermal transfer processing, and finally ten-color printing by a ten-color printer 3. Combining the above multiple processing methods, the ten-color printer can complete ten-color printing, the laser aluminum-plated transfer film process can achieve 3-color printing, the thermal transfer technology can achieve 3-color printing, and the color spraying process can achieve 2-color printing, so that this structure can achieve 18-color printing. Compared with the existing printing soft packaging structure, the structure of the present invention can achieve 18-color printing at the same time with relatively low cost and high degree of automation, so it is suitable for assembly line production and has high application value.

[0024] The rotating feeding member 4 includes a rotating base 401 whose bottom is connected to the output shaft of the driving motor. A square processing groove 402 for placing the soft package to be processed is opened on one side of the top of the rotating base 401. The soft package to be printed is placed in the processing groove 402. The rotating base 401 is driven to rotate by turning on the driving motor, and then the soft package is driven to move, and is moved to the bottom of each processing structure in turn for processing. No manual operation is required, and the automation and safety are relatively high.

[0025] A micro electric push rod is embedded in the processing groove 402, and a push bar 403 is fixed on the telescopic end of the micro electric push rod. After the soft package to be processed is sprayed, laser aluminum-plated and thermally transferred, it is pushed onto the printing conveyor 2 and sent to the ten-color printer 3 for final printing.

[0026] The auxiliary loading component includes a T-shaped bracket 501, and a coloring slot 502, a transfer film loading slot 503 and a thermal transfer paper loading slot 504 are respectively opened above the three ends of the T-shaped bracket 501. The coloring slot 502 is used for placing and transferring the shielding frame of the inkjet device 7, the transfer film loading slot 503 is used for placing the laser aluminum-plated transfer film, and the thermal transfer paper loading slot 504 is used for placing the thermal transfer paper.

[0027] A moving frame 505 for placing a shielding frame is slidably installed in the coloring groove 502. A screw control component 506 connected to the moving frame 505 and used for controlling the position adjustment of the moving frame 505 is installed in the coloring groove 502. A limit rod corresponding to the position of the screw control component 506 and slidingly passing through the moving frame 505 is also fixedly arranged in the coloring groove 502. The position of the limit rod is symmetrical to the screw to maintain the stability of the moving frame 505.

[0028] The lead screw control component 506 includes a micro motor fixed on one end of the inner wall of the coloring groove 502 and a lead screw connected to the output shaft of the micro motor. One end of the lead screw is rotatably connected to the side wall of the coloring groove 502. The movable frame 505 is threadedly connected to the lead screw. The micro motor is turned on to control the rotation of the lead screw, and the threaded structure is used to push the movable frame 505 connected thereto to move, so as to adjust the position of the shielding frame, and shield the dye sprayed by the color spraying device 7 through the shielding frame to form a specific pattern.

[0029] The symmetrical inner walls of the transfer film loading slot 503 and the thermal transfer paper loading slot 504 are both provided with elastic brackets 507, which can be retracted into the slot when subjected to external force. They can not only support the thermal transfer paper or laser aluminum-plated transfer film, but also retract when subjected to external force without affecting the printing work.

[0030] A first electric telescopic rod 508 is fixedly installed on one side of the top of the transfer film loading groove 503. The telescopic end of the first electric telescopic rod 508 is connected to a lifting seat 510 through a first U-shaped frame 509. The lifting seat 510 is located directly above the transfer film loading groove 503. Sliding grooves 511 are provided on both symmetrical sides of the lifting seat 510. A self-propelled control wheel 512 is installed in the sliding groove 511 on one side. The self-propelled control wheel 512 consists of a housing, a motor and a roller. The motor is installed in the housing, and the roller is installed on the motor. The roller can move in the sliding groove 511, thereby driving the pressing roller 513 below to move. The sliding groove 511 on the other side is installed The outer sides of the driving wheel, the driven wheel and the automatic control wheel are rotatably connected to the pressing roller 513 through the connecting frame. The length of the pressing roller 513 is the same as the width of the transfer film loading slot 503. After the soft packaging bag moves to the bottom of the vacuum aluminum plating equipment 8 and the pressing roller 513, the first electric telescopic rod 508 is controlled to retract, so that the first U-shaped frame 509 and the lifting seat 510 are lowered, and the pressing roller 513 at the bottom is lowered to press the laser aluminum-plated transfer film onto the soft packaging bag below, and then the self-propelled control wheel 512 starts to move back and forth, driving the pressing roller 513 to continuously move above the laser aluminum-plated transfer film, so that the laser aluminum-plated transfer film and the soft packaging bag are tightly fitted.

[0031] A second electric telescopic rod 514 is fixedly installed on one side of the top of the thermal transfer paper feeding slot 504. The telescopic end of the second electric telescopic rod 514 is connected to a heating plate 516 through a second U-shaped frame 515. The heating surface of the heating plate 516 faces downward, and the heating surface of the heating plate 516 is coated with a Teflon coating 517. After the soft packaging bag is transferred to the bottom of the thermal transfer paper feeding slot 504, the second electric telescopic rod 514 is controlled to retract, so that the second U-shaped frame 515 and the heating plate 516 are lowered together, and the thermal transfer paper is pressed onto the soft packaging bag and then the heating plate 516 is turned on, so that the dye on the thermal transfer paper is transferred to the soft packaging bag.

[0032] A positioning printing flexible packaging process is realized by a positioning printing flexible packaging structure, and specifically comprises the following steps: S1, pre-placement of raw materials, placing the flexible packaging bag to be printed in the processing slot 402 of the rotating feeding member 4, placing the shielding frame in the movable frame 505 in the coloring slot 502 according to the printing requirements, placing the laser aluminized transfer film in the transfer film feeding slot 503, placing the thermal transfer paper in the thermal transfer paper feeding slot 504, and then presetting the data to be printed in each device; S2, color spraying process, control the driving motor to start and drive the rotating feeding part 4 to rotate, move the soft packaging bag to the bottom of the color spraying device 7, first coat the base color through the color spraying device 7, then the lead screw control part 506 controls the moving frame 505 to move, move the shielding frame to between the color spraying device 7 and the bottom soft packaging bag, and then spray the second time through the color spraying device 7 to achieve two-color printing; S3, laser aluminizing, continue to control the rotation of the rotary feeder 4 to move the soft packaging bag to the bottom of the vacuum aluminizing equipment 8, then control the first electric telescopic rod 508 to retract, so that the first U-shaped frame 509 and the lifting seat 510 are lowered together, and the bottom pressing roller 513 is lowered accordingly, until the laser aluminizing transfer film is pressed onto the soft packaging bag below, and then the self-propelled control wheel 512 starts to reciprocate, driving the pressing roller 513 to continuously move above the laser aluminizing transfer film, so that the laser aluminizing transfer film and the soft packaging bag are closely attached, without bubbles and wrinkles; S4, mold pressing and heating, the rotary feeder 4 is further rotated to make the flexible packaging bag rotate to the bottom of the thermal transfer paper feeding slot 504, and then the second electric telescopic rod 514 is controlled to retract, so that the second U-shaped frame 515 and the heating plate 516 are lowered together, and the thermal transfer paper is pressed onto the flexible packaging bag, and then the heating plate 516 is turned on, so that the dye on the thermal transfer paper is transferred to the flexible packaging bag; S5, the printing press prints, controls the micro electric push rod to extend, controls the push bar 403 to move, sends the flexible packaging bag in the processing groove 402 to the printing conveyor 2, and then sends it to the ten-color printing press 3 through the printing conveyor 2 to complete the final printing.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A positioning printing soft packaging structure, comprising a comprehensive processing platform (1), a printing conveyor (2), and a ten-color printing machine (3) arranged above the printing conveyor (2), characterized in that: A driving motor is installed at the bottom of the integrated processing platform (1), and a rotating feeding member (4) is arranged at the top of the integrated processing platform (1). The bottom central axis of the rotating feeding member (4) is connected to the output shaft of the driving motor. A spraying device (7) and a vacuum aluminum plating device (8) are installed at the top of the integrated processing platform (1) through a height adjustment frame (9), respectively, for spraying and vacuum aluminum plating when the rotating feeding member (4) moves to the bottom. An auxiliary loading and processing component (5) is also installed at the top of the integrated processing platform (1) through a fixed frame (6), which is used for automatically loading and processing a shielding frame of the spraying device (7), a laser aluminum transfer film and a thermal transfer paper.

2. The positioning printing flexible packaging structure according to claim 1, characterized in that: The rotating feeding member (4) comprises a rotating base (401) whose bottom is connected to the output shaft of the driving motor, and a square processing groove (402) for placing the soft package to be processed is provided on one side of the top of the rotating base (401).

3. The positioning printing flexible packaging structure according to claim 2, characterized in that: The processing groove (402) is embedded with a micro electric push rod, and a push bar (403) is fixed on the telescopic end of the micro electric push rod. After the soft package to be processed has been sprayed, laser aluminum-plated and thermally transferred, it is pushed onto the printing conveyor (2) and sent to the ten-color printing machine (3) for final printing.

4. The positioning printing flexible packaging structure according to claim 1, characterized in that: The auxiliary loading component comprises a T-shaped bracket (501), and a coloring slot (502), a transfer film loading slot (503) and a thermal transfer paper loading slot (504) are respectively provided above the three ends of the T-shaped bracket (501), the coloring slot (502) is used for placing and transferring the shielding frame of the color spraying device (7), the transfer film loading slot (503) is used for placing the laser aluminum-plated transfer film, and the thermal transfer paper loading slot (504) is used for placing the thermal transfer paper.

5. The positioning printing flexible packaging structure according to claim 4, characterized in that: A movable frame (505) for placing a shielding frame is slidably mounted in the coloring groove (502); a lead screw control component (506) connected to the movable frame (505) and used for controlling the position adjustment of the movable frame (505) is mounted in the coloring groove (502); a limit rod corresponding to the position of the lead screw control component (506) and slidably penetrated in the movable frame (505) is also fixedly arranged in the coloring groove (502).

6. The positioning printing flexible packaging structure according to claim 5, characterized in that: The lead screw control component (506) comprises a micro motor fixed at one end of the inner wall of the coloring groove (502) and a lead screw connected to the output shaft of the micro motor, one end of the lead screw is rotatably connected to the side wall of the coloring groove (502), and the movable frame (505) is threadedly connected to the lead screw.

7. The positioning printing flexible packaging structure according to claim 6, characterized in that: The inner walls on both sides of the transfer film loading slot (503) and the thermal transfer paper loading slot (504) are symmetrically provided with elastic brackets (507) which can be retracted into the slots when subjected to external forces.

8. The positioning printing flexible packaging structure according to claim 7, characterized in that: A first electric telescopic rod (508) is fixedly installed on one side of the top of the transfer film loading groove (503); the telescopic end of the first electric telescopic rod (508) is connected to a lifting seat (510) via a first U-shaped frame (509); the lifting seat (510) is located directly above the transfer film loading groove (503); sliding grooves (511) are provided on two symmetrical sides of the lifting seat (510); a self-propelled control wheel (512) is installed in the sliding groove (511) on one side; a driven wheel is installed in the sliding groove (511) on the other side; the outer sides of the driven wheel and the automatic control wheel are rotatably connected to a pressing roller (513) via a connecting frame; the length of the pressing roller (513) is the same as the width of the transfer film loading groove (503).

9. The positioning printing flexible packaging structure according to claim 8, characterized in that: A second electric telescopic rod (514) is fixedly mounted on one side of the top of the thermal transfer paper loading slot (504); the telescopic end of the second electric telescopic rod (514) is connected to a heating plate (516) via a second U-shaped frame (515); the heating surface of the heating plate (516) faces downward, and a Teflon coating (517) is coated on the heating surface of the heating plate (516).

10. A positioning printing flexible packaging process, characterized in that: The positioning printing flexible packaging structure according to any one of claims 1 to 9 is implemented by specifically comprising the following steps: S1, pre-placing raw materials, placing the flexible packaging bag to be printed in the processing slot (402) of the rotating feeding member (4), placing a shielding frame in the movable frame (505) in the coloring slot (502) according to printing requirements, placing a laser aluminum-plated transfer film in the transfer film loading slot (503), placing thermal transfer paper in the thermal transfer paper loading slot (504), and then presetting the data to be printed in each device; S2, color spraying processing, controlling the driving motor to start and drive the rotating feeding member (4) to rotate, moving the soft packaging bag to the bottom of the color spraying device (7), firstly coating the bottom color through the color spraying device (7), then controlling the moving frame (505) to move through the lead screw control member (506), moving the shielding frame to between the color spraying device (7) and the bottom soft packaging bag, and then performing secondary color spraying through the color spraying device (7), thereby realizing two-color printing; S3, laser aluminum plating, continue to control the rotation of the rotating feeding member (4) to move the soft packaging bag to the bottom of the vacuum aluminum plating equipment (8), then first control the first electric telescopic rod (508) to retract, so that the first U-shaped frame (509) and the lifting seat (510) are lowered together, and the bottom pressing roller (513) is lowered accordingly, until the laser aluminum plating transfer film is pressed onto the soft packaging bag below, and then the self-propelled control wheel (512) starts to reciprocate, driving the pressing roller (513) to continuously move above the laser aluminum plating transfer film, so that the laser aluminum plating transfer film and the soft packaging bag are tightly fitted without bubbles and wrinkles; S4, molding and heating, the rotary feeder (4) is further rotated to make the flexible packaging bag rotate to the bottom of the thermal transfer paper feeding slot (504), and then the second electric telescopic rod (514) is controlled to retract, so that the second U-shaped frame (515) and the heating plate (516) are lowered together, the thermal transfer paper is pressed onto the flexible packaging bag, and then the heating plate (516) is turned on, so that the dye on the thermal transfer paper is transferred to the flexible packaging bag; S5, the printing press prints, controls the micro electric push rod to extend, controls the push bar (403) to move, and delivers the flexible packaging bag in the processing groove (402) to the printing conveyor (2), and then delivers it to the ten-color printing press (3) through the printing conveyor (2) to complete the final printing.

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