Digital printing positioning and blister forming equipment for plastic sheet

Abstract

The application relates to a digital printing positioning and plastic forming equipment for plastic sheets, which comprises a sheet feeding mechanism, a digital printing mechanism and a positioning and plastic forming mechanism. The digital printing mechanism comprises a digital printer body, which is used for printing patterns and positioning blocks on the plastic sheets. The positioning and plastic forming mechanism comprises a second rack, a sheet conveying track, a heating assembly, a positioning identifier, a plastic forming die and a die lifting mechanism arranged in the second rack. The heating assembly is used for heating the plastic sheets on the sheet conveying track. The positioning identifier is used for identifying the positioning blocks on the plastic sheets. The die lifting mechanism drives the plastic forming die to lift and then performs plastic forming processing on the heated plastic sheets on the sheet conveying track. The digital printer body directly prints the sheets, is green and environment-friendly, directly heats and positions and forms through the positioning and plastic forming mechanism, has few production procedures and is convenient for recycling and reuse.

Description

Technical Field

[0001] This invention relates to the field of vacuum forming technology, and in particular to a digital printing and positioning vacuum forming device for plastic sheets. Background Technology

[0002] In existing technologies, there are generally several methods for printing graphics on plastic sheets: One method is to directly spray-print graphics onto the product. However, the patterns printed using this spray-printing process are usually not clear enough, and the process is prone to environmental pollution. Another method is to first print the pattern on a film, and then adhere the printed film (such as PE film) onto the plastic sheet. This adds another processing step, and the adhesion between the printed film and the plastic sheet must be considered. The process is complex, and the laminated composite material is not conducive to environmentally friendly recycling and reuse. Summary of the Invention

[0003] Based on this, the purpose of the present invention is to provide a digital printing positioning vacuum forming device for plastic sheets, so as to solve the shortcomings and deficiencies of the prior art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A digital printing and positioning vacuum forming device for plastic sheets includes a sheet feeding mechanism, a digital printing mechanism, and a positioning vacuum forming mechanism arranged sequentially from left to right at intervals.

[0006] The sheet feeding mechanism is used to place plastic sheets and feed plastic sheets to the digital printing mechanism;

[0007] The digital printing mechanism includes a first frame and a sheet feeding platform, a conveying roller assembly, an elastic clamping assembly, and a digital printer body mounted on the first frame. The conveying roller assembly is located on the side of the sheet feeding platform away from the sheet feeding mechanism. The elastic clamping assembly is located above the conveying roller assembly, and a printing conveying channel is formed between the elastic clamping assembly and the conveying roller assembly. The printing conveying channel is used to convey plastic sheets. The digital printer body is located on the side of the printing conveying channel away from the sheet feeding platform and is used to print patterns and positioning blocks on the plastic sheets.

[0008] The positioning vacuum forming mechanism includes a second frame and a sheet conveying track, a heating component, a positioning identifier, a vacuum forming mold, and a mold lifting mechanism disposed within the second frame. The sheet conveying track is located in the middle of the second frame and extends horizontally. The heating component is used to heat the plastic sheet on the sheet conveying track. The positioning identifier is used to identify the positioning block on the plastic sheet. The mold lifting mechanism drives the vacuum forming mold to lift and lower, thereby performing vacuum forming processing on the heated plastic sheet on the sheet conveying track.

[0009] In one embodiment, the conveyor roller assembly includes a conveyor drive motor, a conveyor roller, and a conveyor belt. The conveyor drive motor is located on one side above the first frame. Conveyor bearings are respectively fitted at both ends of the conveyor roller. One of the conveyor bearings is rigidly connected to a conveyor gear on the same axis. The output end of the conveyor drive motor is connected to the conveyor gear through the conveyor belt, and the conveyor drive motor drives the conveyor roller to rotate through the conveyor belt.

[0010] In one embodiment, the elastic pressing assembly includes a pressing base plate and a plurality of elastic roller modules disposed at the bottom of the pressing base plate. The pressing base plate is mounted above the conveying roller shaft. Each of the plurality of elastic roller modules includes a roller mounting base, a roller connecting block, and a rolling pulley. The roller mounting base is disposed at the bottom of the pressing base plate. The roller connecting block is rotatably mounted on the roller mounting base by a torsion spring. The rolling pulley is rotatably mounted on the roller connecting block. The rolling pulley on each elastic roller module is coaxially arranged and forms the printing conveying channel with the conveying roller shaft.

[0011] In one embodiment, the vacuum forming mold includes an upper forming mold and a lower forming mold. The mold lifting mechanism includes an upper mold lifting assembly and a lower mold lifting assembly. The upper mold lifting assembly is located on the upper part of the second frame and is used to drive the upper forming mold to move up and down. The lower mold lifting assembly is located on the lower part of the second frame and is used to drive the lower forming mold to move up and down. The positioning identifier is used to identify the positioning block on the plastic sheet and adjust the feeding stroke of the sheet conveying track. The upper forming mold and the lower forming mold are located on the upper and lower sides of the sheet conveying track, respectively, and the upper forming mold and the lower forming mold are closed to each other to perform vacuum forming processing on the plastic sheet on the sheet conveying track.

[0012] In one embodiment, the upper mold lifting assembly includes an upper mold mounting base and an upper mold driving cylinder. The upper mold mounting base is located on the upper part of the second frame, and the upper mold driving cylinder is mounted on the upper mold mounting base with its output end pointing vertically downward. The top of the forming upper mold is mounted on the output end of the upper mold driving cylinder. The lower mold lifting assembly includes a lower mold mounting base and a lower mold driving cylinder. The lower mold mounting base is located on the lower part of the second frame, and the lower mold driving cylinder is mounted on the lower mold mounting base with its output end pointing vertically upward. The bottom of the forming lower mold is mounted on the output end of the lower mold driving cylinder.

[0013] In one embodiment, the vacuum forming mold further includes an upper rotating assembly and a lower rotating assembly. The upper rotating assembly includes an upper rotating drive motor and an upper drive gear disposed at the output end of the upper rotating drive motor. The lower rotating assembly includes a lower rotating drive motor and a lower drive gear disposed at the output end of the lower rotating drive motor. The upper mold mounting base is provided with an upper transmission gear, which is connected to the upper drive gear via an upper transmission toothed belt. The lower mold mounting base is provided with a lower transmission gear, which is connected to the lower drive gear via a lower transmission toothed belt.

[0014] In one embodiment, the heating assembly includes an upper heating frame, a lower heating frame, an upper heating box, and a lower heating box. The sheet conveying track is provided with a sheet heating station. The upper heating frame and the lower heating frame are respectively arranged opposite each other at the top and bottom of the second frame. The upper heating box and the lower heating box are respectively installed at the bottom of the upper heating frame and the top of the lower heating frame. The heating surfaces of the upper heating box and the lower heating box are respectively arranged opposite each other above and below the sheet heating station. The upper heating box and the lower heating box are used to heat and process the plastic sheet on the sheet heating station.

[0015] In one embodiment, the middle sections of the left and right sides of the second frame are respectively provided with sheet feed inlets and sheet discharge outlets, and the sheet conveying track is arranged horizontally between the sheet feed inlets and the sheet discharge outlets.

[0016] In one embodiment, the sheet conveying track includes two parallel sheet guide rails, and the second frame is provided with a guide rail spacing adjustment device, which is used to adjust the distance between the two sheet guide rails.

[0017] In one embodiment, the sheet feeding mechanism includes a sheet limiting frame and a sheet support plate. The sheet limiting frame includes two relatively parallel sheet limiting plates, and the tops of the two sheet limiting plates are respectively provided with roller support grooves. The two roller support grooves are used to receive the rollers at the center of the plastic sheet roll. The sheet support plate is used to connect the two sheet limiting plates. The sheet support plate is located on the side of the two sheet limiting plates near the digital printing mechanism, and the top of the sheet support plate is rotatably provided with a roller, which is used to assist in the feeding and conveying of the plastic sheet.

[0018] Compared with traditional technologies, the advantages of the digital printing positioning vacuum forming equipment for plastic sheets of the present invention are:

[0019] This invention uses a digital printer to print on plastic sheets, which is more environmentally friendly than spraying and offers faster printing speeds with clearer and more durable patterns. Furthermore, the printed plastic sheet is directly fed into a positioning vacuum forming mechanism for heating and vacuum forming, reducing the intermediate processes of rewinding after printing and unwinding before forming. This reduces production steps and avoids misalignment caused by rewinding. Additionally, the vacuum-formed pattern on the product is three-dimensional and novel, and compared to traditional lamination processes, the printed pattern is easier to remove for recycling.

[0020] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the digital printing positioning vacuum forming equipment for plastic sheets of the present invention;

[0022] Figure 2 This is a schematic diagram of the sheet feeding mechanism of the digital printing positioning vacuum forming equipment for plastic sheets of the present invention.

[0023] Figure 3 This is a schematic diagram of the digital printing mechanism of the digital printing positioning vacuum forming equipment for plastic sheets of the present invention.

[0024] Figure 4 This is another schematic diagram of the digital printing mechanism of the digital printing positioning vacuum forming equipment for plastic sheets of the present invention.

[0025] Figure 5 This is a schematic diagram of the positioning and vacuum forming mechanism of the digital printing and positioning vacuum forming equipment for plastic sheets of the present invention.

[0026] Figure 6 for Figure 5 An enlarged schematic diagram of part A shown;

[0027] Figure 7 This is a schematic diagram of the heating component of the digital printing positioning vacuum forming equipment for plastic sheets according to the present invention.

[0028] Figure 8 This is a schematic diagram of the structure of the vacuum forming mold of the digital printing positioning vacuum forming equipment for plastic sheets of the present invention.

[0029] Explanation of reference numerals in the attached drawings: 10. Sheet feeding mechanism; 11. Sheet limiting plate; 12. Sheet support plate; 13. Roller; 14. Roller support groove; 20. Digital printing mechanism; 21. First frame; 22. Sheet feeding platform; 23. Conveyor roller assembly; 231. Conveyor drive motor; 232. Conveyor roller; 233. Conveyor belt; 234. Conveyor bearing; 24. Elastic clamping assembly; 241. Clamping base plate; 242. Elastic roller module; 243. Rolling pulley; 25. Digital printer body; 30. Positioning vacuum forming mechanism; 31. Second frame; 32. Sheet inlet; 33. Sheet outlet; 34. Guide rail 40. Adjustable spacing device; 41. Sheet conveying track; 42. Sheet guide rail; 43. Sheet drive motor; 44. Sheet conveyor belt; 50. Sheet conveying roller; 51. Heating assembly; 52. Upper heating frame; 53. Lower heating frame; 54. Upper heating box; 60. Vacuum forming mold; 61. Upper forming mold; 62. Lower forming mold; 63. Upper rotary drive motor; 64. Lower rotary drive motor; 65. Lower drive gear; 66. Lower transmission toothed belt; 70. Mold lifting mechanism; 71. Upper mold mounting base; 72. Upper mold drive cylinder; 73. Lower mold mounting base; 74. Lower mold drive cylinder; 75. Lower transmission gear. Detailed Implementation

[0030] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention.

[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "left," "right," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting this invention.

[0032] Please see Figures 1 to 8This embodiment provides a digital printing and positioning vacuum forming device for plastic sheets, which includes a sheet feeding mechanism 10, a digital printing mechanism 20, and a positioning vacuum forming mechanism 30 arranged sequentially from left to right. The sheet feeding mechanism 10 is used to place and feed plastic sheets, the digital printing mechanism 20 is used to print patterns on the plastic sheets, and the positioning vacuum forming mechanism 30 is used to heat and vacuum form the printed plastic sheets.

[0033] Optionally, the sheet feeding mechanism 10 of this embodiment is used to place plastic sheets and convey them to the digital printing mechanism 20. Specifically, in this embodiment, the sheet feeding mechanism 10 includes a sheet limiting frame and a sheet support plate 12. The sheet limiting frame includes two relatively parallel sheet limiting plates 11. The tops of the two sheet limiting plates 11 are respectively provided with roller support grooves 14, which are used to receive the rollers at the center of the plastic sheet roll. The sheet support plate 12 is used to connect the two sheet limiting plates 11, and the sheet support plate 12 is located on the side of the two sheet limiting plates 11 near the digital printing mechanism 20. The top of the sheet support plate 12 is rotatably provided with a roller 13, which is used to assist in the feeding and conveying of the plastic sheet. Thus, in this embodiment, the plastic sheet roll is placed on two sheet limiting plates 11, and the two ends of the roller shaft at the center of the plastic sheet roll are respectively placed on two roller shaft slots 14. The outermost end of the plastic sheet extends into the digital printing mechanism 20, and the roller 13 is used to assist in the feeding and conveying of the plastic sheet.

[0034] Optionally, the digital printing mechanism 20 of this embodiment includes a first frame 21 and a sheet feeding platform 22, a conveying roller assembly 23, an elastic clamping assembly 24, and a digital printer body 25 disposed on the first frame 21. The conveying roller assembly 23 is disposed on the side of the sheet feeding platform 22 away from the sheet feeding mechanism 10. The elastic clamping assembly 24 is disposed above the conveying roller assembly 23, and a printing conveying channel is formed between the elastic clamping assembly 24 and the conveying roller assembly 23. The printing conveying channel is used to convey plastic sheets. The digital printer body 25 is disposed on the side of the printing conveying channel away from the sheet feeding platform 22 and is used to print patterns and positioning blocks on the plastic sheets.

[0035] In this embodiment, the conveyor roller assembly 23 includes a conveyor drive motor 231, a conveyor roller 232, and a conveyor belt 233. The conveyor drive motor 231 is located on one side above the first frame 21. Conveyor bearings 234 are respectively fitted at both ends of the conveyor roller 232. One of the conveyor bearings 234 is coaxially rigidly connected to a conveyor gear. The output end of the conveyor drive motor 231 is connected to the conveyor gear through the conveyor belt 233. The conveyor drive motor 231 drives the conveyor roller 232 to rotate through the conveyor belt 233.

[0036] Furthermore, the elastic pressing assembly 24 of this embodiment includes a pressing base plate 241 and a plurality of elastic roller modules 242 disposed at the bottom of the pressing base plate 241. The pressing base plate 241 is mounted above the conveying roller shaft 232. The plurality of elastic roller modules 242 respectively include a roller mounting seat, a roller connecting block and a rolling pulley 243. The roller mounting seat is disposed at the bottom of the pressing base plate 241. The roller connecting block is rotatably disposed on the roller mounting seat by a torsion spring. The rolling pulley 243 is rotatably disposed on the roller connecting block. The rolling pulley 243 on each elastic roller module 242 is coaxially arranged and forms a printing conveying channel with the conveying roller shaft 232.

[0037] Therefore, in this embodiment, the conveyor roller 232 is driven by the conveyor drive motor 231 and forms a printing conveying channel with the multiple rolling pulleys 243 of the elastic pressing assembly 24. When the plastic sheet enters the printing conveying channel, the digital printer body 25 prints patterns and positioning blocks on the plastic sheet. The sheet feeding platform 22 assists in receiving the plastic sheet, making the feeding of the plastic sheet more stable. In this embodiment, the digital printer body 25, in conjunction with a computer, sets the pattern printing layout and printing effect on the plastic sheet, and simultaneously sets the positioning blocks on the side of the plastic sheet. This allows the digital printer body 25 to print preset patterns and positioning blocks on the plastic sheet. Subsequently, when the plastic sheet enters the positioning vacuum forming mechanism 30, the positioning blocks on the plastic sheet can be identified by a positioning identifier, and the feeding process of the sheet conveyor track 40 can be adjusted accordingly. This ensures that the pattern on the plastic sheet corresponds to the position of the vacuum forming mold 60 during vacuum forming, guaranteeing the shape effect of the printed pattern on the final product.

[0038] Optionally, the positioning vacuum forming mechanism 30 of this embodiment includes a second frame 31 and a sheet conveying track 40, a heating component 50, a vacuum forming mold 60, and a mold lifting mechanism 70 disposed within the second frame 31. The sheet conveying track 40 is located in the middle of the second frame 31 and extends horizontally. The heating component 50 heats the plastic sheet on the sheet conveying track 40. The mold lifting mechanism 70 drives the vacuum forming mold 60 to rise and fall, thereby performing vacuum forming processing on the heated plastic sheet on the sheet conveying track 40.

[0039] Specifically, in this embodiment, the middle portions of the left and right sides of the second frame 31 are respectively provided with sheet feed inlets 32 and sheet discharge outlets 33, and the sheet conveying track 40 is arranged horizontally between the sheet feed inlets 32 and the sheet discharge outlets 33. Further, the sheet conveying track 40 includes two parallel sheet guide rails 41, and the interior of the second frame 31 is provided with a guide rail adjustment device 34, which is used to adjust the distance between the two sheet guide rails 41.

[0040] In this embodiment, the two sheet guide rails 41 respectively include a sheet drive motor 42, a sheet conveyor belt 43 and a plurality of sheet conveying rollers 44. The drive motor is used to drive the dry sheet conveying rollers 44 to rotate, and then drives the sheet conveyor belt 43 to perform transmission by driving the dry sheet conveying rollers 44.

[0041] In addition, the heating assembly 50 of this embodiment includes an upper heating frame 51, a lower heating frame 52, an upper heating box 53, and a lower heating box 54. The sheet conveying track 40 is provided with a sheet heating station. The upper heating frame 51 and the lower heating frame 52 are respectively arranged opposite each other at the top and bottom of the second frame 31. The upper heating box 53 and the lower heating box 54 are respectively installed at the bottom of the upper heating frame 51 and the top of the lower heating frame 52. The heating surfaces of the upper heating box 53 and the lower heating box 54 are respectively arranged opposite each other above and below the sheet heating station. The upper heating box 53 and the lower heating box 54 are used to heat and process the plastic sheet on the sheet heating station.

[0042] Optionally, the vacuum forming mold 60 in this embodiment includes an upper forming mold 61 and a lower forming mold 62. The mold lifting mechanism 70 includes an upper mold lifting assembly and a lower mold lifting assembly. The upper mold lifting assembly is located on the upper part of the second frame 31 and is used to drive the upper forming mold 61 to move up and down. The lower mold lifting assembly is located on the lower part of the second frame 31 and is used to drive the lower forming mold 62 to move up and down. The upper forming mold 61 and the lower forming mold 62 are respectively located on the upper and lower sides of the sheet conveying track 40, and the upper forming mold 61 and the lower forming mold 62 are closed to perform vacuum forming processing on the plastic sheet on the sheet conveying track 40.

[0043] In addition, the positioning identifier in this embodiment is used to identify the positioning blocks on the plastic sheet and adjust the feeding stroke of the sheet conveying track 40. Specifically, the positioning identifier in this embodiment can be a photoelectric sensor structure, mainly used to identify the positioning blocks. After identification, it can send an identification signal to the control operating system, which then controls the feeding stroke of the sheet conveying track 40. In this way, when the positioning identifier identifies the positioning block, the sheet conveying track 40 stops conveying the plastic sheet, so that the printed pattern on the plastic sheet can correspond to the cavity position of the upper forming mold 61 and the lower forming mold 62. Then, the upper mold lifting assembly and the lower mold lifting assembly respectively drive the upper forming mold 61 and the lower forming mold 62 to close each other to perform vacuum forming processing on the plastic sheet on the sheet conveying track 40, ensuring the shaping effect of the printed pattern on the final vacuum-formed product.

[0044] Further, the upper mold lifting assembly of this embodiment includes an upper mold mounting base 71 and an upper mold driving cylinder 72. The upper mold mounting base 71 is located on the upper part of the second frame 31, and the upper mold driving cylinder 72 is mounted on the upper mold mounting base 71 with its output end vertically downward. The top of the forming upper mold 61 is mounted on the output end of the upper mold driving cylinder 72. The lower mold lifting assembly includes a lower mold mounting base 73 and a lower mold driving cylinder 74. The lower mold mounting base 73 is located on the lower part of the second frame 31, and the lower mold driving cylinder 74 is mounted on the lower mold mounting base 73 with its output end vertically upward. The bottom of the forming lower mold 62 is mounted on the output end of the lower mold driving cylinder 74.

[0045] Furthermore, the vacuum forming mold 60 of this embodiment also includes an upper rotating assembly and a lower rotating assembly. The upper rotating assembly includes an upper rotating drive motor 63 and an upper drive gear disposed at the output end of the upper rotating drive motor 63. The lower rotating assembly includes a lower rotating drive motor 64 and a lower drive gear 65 disposed at the output end of the lower rotating drive motor 64. The upper mold mounting base 71 is provided with an upper transmission gear, which is connected to the upper drive gear via an upper transmission toothed belt. The lower mold mounting base 73 is provided with a lower transmission gear 75, which is connected to the lower drive gear 65 via a lower transmission toothed belt 66. Thus, the upper forming mold 61 and the lower forming mold 62 of this embodiment can be rotated and adjusted by the upper rotating assembly and the lower rotating assembly, respectively, making the adjustment of the forming angle of the upper forming mold 61 and the lower forming mold 62 of this embodiment more flexible and convenient.

[0046] Therefore, this invention uses a digital printer body 25 to print on plastic sheets, which is more environmentally friendly than spraying and has a faster printing speed, resulting in clear and durable printed patterns. Furthermore, the printed plastic sheets are directly fed into the positioning vacuum forming mechanism 30 for heating and vacuum forming, reducing the intermediate processes of rewinding the printed plastic sheets and unwinding them before forming. This reduces production steps and avoids misalignment caused by rewinding. In addition, after vacuum forming, the pattern on the product is three-dimensional and novel. Compared with traditional lamination processes, the printed pattern is easier to remove for recycling of the plastic sheets.

[0047] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the digital printing positioning vacuum forming equipment for plastic sheets. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A digital printing positioning vacuum forming device for plastic sheets, characterized in that: It includes a sheet feeding mechanism, a digital printing mechanism, and a positioning vacuum forming mechanism, which are arranged sequentially from left to right at intervals. The sheet feeding mechanism is used to place plastic sheets and feed plastic sheets to the digital printing mechanism; The digital printing mechanism includes a first frame and a sheet feeding platform, a conveying roller assembly, an elastic clamping assembly, and a digital printer body mounted on the first frame. The conveying roller assembly is located on the side of the sheet feeding platform away from the sheet feeding mechanism. The elastic clamping assembly is located above the conveying roller assembly, and a printing conveying channel is formed between the elastic clamping assembly and the conveying roller assembly. The printing conveying channel is used to convey plastic sheets. The digital printer body is located on the side of the printing conveying channel away from the sheet feeding platform and is used to print patterns and positioning blocks on the plastic sheets. The positioning vacuum forming mechanism includes a second frame and a sheet conveying track, a heating component, a positioning identifier, a vacuum forming mold, and a mold lifting mechanism disposed within the second frame. The sheet conveying track is located in the middle of the second frame and extends horizontally. The heating component is used to heat the plastic sheet on the sheet conveying track. The positioning identifier is used to identify the positioning block on the plastic sheet. The mold lifting mechanism drives the vacuum forming mold to lift and lower, thereby performing vacuum forming processing on the heated plastic sheet on the sheet conveying track. The conveying roller assembly includes a conveying drive motor, a conveying roller, and a conveying belt. The conveying drive motor is located on one side above the first frame. Conveying bearings are respectively fitted at both ends of the conveying roller. One of the conveying bearings is rigidly connected to a conveying gear on the same axis. The output end of the conveying drive motor is connected to the conveying gear through the conveying belt. The conveying drive motor drives the conveying roller to rotate through the conveying belt. The vacuum forming mold includes an upper forming mold and a lower forming mold. The mold lifting mechanism includes an upper mold lifting assembly and a lower mold lifting assembly. The upper mold lifting assembly is located on the upper part of the second frame and is used to drive the upper forming mold to move up and down. The lower mold lifting assembly is located on the lower part of the second frame and is used to drive the lower forming mold to move up and down. The positioning identifier is used to identify the positioning block on the plastic sheet and adjust the feeding stroke of the sheet conveying track. The upper forming mold and the lower forming mold are located on the upper and lower sides of the sheet conveying track, respectively, and the upper forming mold and the lower forming mold are closed to perform vacuum forming processing on the plastic sheet on the sheet conveying track.

2. The digital printing positioning vacuum forming equipment for plastic sheets according to claim 1, characterized in that: The elastic pressing assembly includes a pressing base plate and a plurality of elastic roller modules disposed at the bottom of the pressing base plate. The pressing base plate is mounted above the conveying roller shaft. Each of the plurality of elastic roller modules includes a roller mounting base, a roller connecting block, and a rolling pulley. The roller mounting base is disposed at the bottom of the pressing base plate. The roller connecting block is rotatably mounted on the roller mounting base by a torsion spring. The rolling pulley is rotatably mounted on the roller connecting block. The rolling pulley on each elastic roller module is coaxially arranged and forms the printing conveying channel with the conveying roller shaft.

3. The digital printing positioning vacuum forming equipment for plastic sheets according to claim 1, characterized in that: The upper mold lifting assembly includes an upper mold mounting base and an upper mold driving cylinder. The upper mold mounting base is located on the upper part of the second frame, and the upper mold driving cylinder is mounted on the upper mold mounting base with its output end pointing vertically downward. The top of the forming upper mold is mounted on the output end of the upper mold driving cylinder. The lower mold lifting assembly includes a lower mold mounting base and a lower mold driving cylinder. The lower mold mounting base is located on the lower part of the second frame, and the lower mold driving cylinder is mounted on the lower mold mounting base with its output end pointing vertically upward. The bottom of the forming lower mold is mounted on the output end of the lower mold driving cylinder.

4. The digital printing positioning vacuum forming equipment for plastic sheets according to claim 3, characterized in that: The vacuum forming mold further includes an upper rotating assembly and a lower rotating assembly. The upper rotating assembly includes an upper rotating drive motor and an upper drive gear disposed at the output end of the upper rotating drive motor. The lower rotating assembly includes a lower rotating drive motor and a lower drive gear disposed at the output end of the lower rotating drive motor. The upper mold mounting base is provided with an upper transmission gear, which is connected to the upper drive gear via an upper transmission toothed belt. The lower mold mounting base is provided with a lower transmission gear, which is connected to the lower drive gear via a lower transmission toothed belt.

5. The digital printing positioning vacuum forming equipment for plastic sheets according to claim 1, characterized in that: The heating assembly includes an upper heating frame, a lower heating frame, an upper heating box, and a lower heating box. The sheet conveying track is provided with a sheet heating station. The upper heating frame and the lower heating frame are respectively arranged opposite each other at the top and bottom of the second frame. The upper heating box and the lower heating box are respectively installed at the bottom of the upper heating frame and the top of the lower heating frame. The heating surfaces of the upper heating box and the lower heating box are respectively arranged opposite each other above and below the sheet heating station. The upper heating box and the lower heating box are used to heat and process the plastic sheet on the sheet heating station.

6. The digital printing positioning vacuum forming equipment for plastic sheets according to claim 1, characterized in that: The second frame has a sheet feed inlet and a sheet discharge outlet in the middle of its left and right sides, respectively, and the sheet conveying track is arranged horizontally between the sheet feed inlet and the sheet discharge outlet.

7. The digital printing positioning vacuum forming equipment for plastic sheets according to claim 6, characterized in that: The sheet conveying track includes two parallel sheet guide rails, and the second frame is equipped with a guide rail spacing adjustment device, which is used to adjust the distance between the two sheet guide rails.

8. The digital printing positioning vacuum forming equipment for plastic sheets according to claim 1, characterized in that: The sheet feeding mechanism includes a sheet limiting frame and a sheet support plate. The sheet limiting frame includes two relatively parallel sheet limiting plates, and the tops of the two sheet limiting plates are respectively provided with roller support grooves. The two roller support grooves are used to receive the rollers at the center of the plastic sheet roll. The sheet support plate is used to connect the two sheet limiting plates. The sheet support plate is located on the side of the two sheet limiting plates near the digital printing mechanism, and the top of the sheet support plate is rotatably provided with a roller, which is used to assist in the feeding and conveying of the plastic sheet.

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