Drying equipment and process for hot-fix tape film production
By introducing V-shaped pressure plate and cleaning parts design in the drying equipment for hot paper film production, combined with tension roller components and gas recycling, the problems of uneven tension and dust adhesion during the drying process of hot paper film are solved, and more efficient drying and flatness are achieved, and the waste rate is reduced.
Patent Information
- Application Number
- CN202510832034.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-20
- Publication Date
- 2025-08-12
AI Technical Summary
The existing drying equipment for hot paper film production is too high during the drying process or the tension is improperly controlled, which causes the hot paper film to shrink or stretch, affecting the flatness and performance, and is prone to wrinkles and dust adhesion, resulting in an increase in the waste rate.
Using a drying equipment including the first and second tension roller components, the V-shaped pressure plate and cleaning member design is used to achieve segmented flattening and surface cleaning of the hot paper film through symmetric tension control and hot air injection, and the drying efficiency is improved in combination with gas recycling.
Effectively inhibit the generation of wrinkles of paper films, improve drying effect and flatness, reduce waste rate, and increase the air outlet area through cleaning parts and hot air jets, improving drying efficiency and effect.
Smart Images
Figure CN120466971A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field related to the production of hot stamping films, and more specifically, relates to a drying device and a process for producing hot stamping films. Background Art
[0002] Hot stamping film is a thermal transfer film designed for paper substrates. It typically consists of a base material, a release layer, an ink layer, and an adhesive layer. It transfers the ink pattern to the paper surface through heat pressing. Its core function is to transfer complex patterns or colors, making it suitable for applications requiring high-precision printing (such as anti-counterfeiting labels and personalized customization). During the production process, the hot stamping film must be dried. However, existing hot stamping film production methods have the following drawbacks: In the prior art, when drying the hot stamping film in the drying equipment used for hot stamping film production, due to excessively high temperature or improper tension control during the drying process, the hot stamping film may shrink or stretch, thereby affecting the flatness and performance of the hot stamping film, and even leading to an increase in the scrap rate.
[0003] In the prior art, drying equipment for producing hot foil films usually uses a tensioning roller assembly to flatten the hot foil films on both sides. However, the current tensioning roller assembly usually adopts a linear contact with the hot foil film to flatten the hot foil film. Since the hot foil film is prone to partial wrinkles during transportation, the tensioning roller assembly uses a linear contact, which easily causes the non-wrinkled parts of the hot foil film to be subjected to excessive force, and the wrinkled parts of the hot foil film to have insufficient tension, resulting in uneven flattening of the hot foil film, thereby affecting the flatness and performance of the hot foil film, and even leading to an increase in the scrap rate.
[0004] In the prior art, drying equipment for producing hot stamping film only dries the surface of the hot stamping film by blowing air, resulting in poor drying effect. In addition, since dust easily adheres to the surface of the hot stamping film during the process of conveying the hot stamping film into the dryer, the surface of the hot stamping film needs to be cleaned.
[0005] Therefore, in view of this, the existing structure and defects are studied and improved, and a drying equipment and process for hot stamping film production are provided, in order to achieve a more practical and valuable purpose. Summary of the Invention
[0006] The present invention provides a drying device for producing hot foil film and a process thereof, which are used to overcome the above-mentioned defects in the prior art.
[0007] The purpose and effect of the drying equipment and process for producing hot foil are achieved by the following specific technical means: A drying device for producing hot paper film, comprising a drying box, wherein two vertical plates are provided through the front and back of the drying box, a feeding roller is provided rotatably between one end of the two vertical plates, a discharging roller is provided rotatably between the other ends of the two vertical plates, a first tensioning roller assembly and a second tensioning roller assembly are provided symmetrically between the middle parts of the two vertical plates, a plurality of first air pipes are provided at intervals on the upper side of the interior of the drying box, and a plurality of second air pipes are provided at intervals on the lower side of the interior of the drying box; the first tensioning roller assembly comprises two first rotating shafts, and the middle outer walls of the two first rotating shafts are respectively provided with a A first guide roller, a movable block is slidingly provided on the outer walls of both ends of the two first rotating shafts, a circular tube is rotated between the corresponding two movable blocks, the outer wall of the circular tube is provided with a tensioning roller body, and a plurality of V-shaped pressure plates are slidingly provided in a circumferential array on the outer wall of the tensioning roller body, a plurality of springs are connected between one side of the V-shaped pressure plate and the interior of the tensioning roller body, a plurality of cleaning parts are hingedly provided on the outer wall of the other side of the V-shaped pressure plate, an air cavity is provided inside the V-shaped pressure plate, a plurality of nozzles are provided on one side of the air cavity, and a torsion spring is provided at the hinge between the cleaning part and the V-shaped pressure plate.
[0008] According to a further technical solution, the two ends of the first rotating shaft are respectively rotatably connected to the middle parts of the two vertical plates, and a pair of limit frames are symmetrically fixed on one side of the middle parts of the two vertical plates close to each other, and the corresponding two movable blocks slide in the pair of limit frames respectively.
[0009] According to a further technical solution, a first gear is provided on the outer wall at both ends of each circular tube, and a rack is fixedly provided inside a pair of limit frames, and the outer wall of the first gear is meshed with one side of the rack.
[0010] According to a further technical solution, the outer walls at both ends of the first rotating shaft are provided with two threaded grooves connected to each other at the head and tail, the outer wall of the first rotating shaft is in sliding contact with the interior of the movable block, and a slider is fixedly provided inside the movable block, and the slider slides spirally in the two threaded grooves.
[0011] A further technical solution is that an airbag is connected between one side of the movable block and the inner side of the limit frame, an annular cavity is provided inside the movable block, the annular cavity is located outside one end of the circular tube, a connecting port is provided to connect the annular cavity to the interior of the circular tube, and a connecting channel is provided to connect the airbag to the annular cavity.
[0012] According to a further technical solution, two sealing rings and two bearings are symmetrically provided between the outer wall of one end of the circular tube and the interior of the movable block. The two sealing rings are located on both sides of the annular cavity, and the two bearings are respectively located on the side away from each other of the two sealing rings.
[0013] A further technical solution is that the structure of the first tensioning roller assembly is the same as that of the second tensioning roller assembly, two first stepper motors are installed on one of the vertical plates, a second gear is provided at one end of each of the two first rotating shafts, the outer walls of the two second gears in the first tensioning roller assembly are respectively engaged with the outer walls of the two second gears in the second tensioning roller assembly, and a support frame is provided on the lower side of the drying box.
[0014] A further technical solution is that two straightening assemblies are provided between the middle parts of the two vertical plates, the two straightening assemblies are located on the front and rear sides of the first tensioning roller assembly, and a second stepper motor is provided at one end of the straightening assembly; the straightening assembly includes two second rotating shafts, the outer walls of the two second rotating shafts are respectively provided with a second guide roller, and one end of the two second rotating shafts is respectively provided with a third gear, the outer walls of the two third gears are meshed, and the output end of the second stepper motor is connected to one end of one of the second rotating shafts.
[0015] A further technical solution is that a first air box is provided on the upper side of the drying box, a second air box is provided on both sides of the interior of the drying box, a fan is provided on one side of the interior of the first air box, a heater is provided inside the first air box, the interior of the first air box is connected with a number of first air pipes and a number of second air pipes and is provided with a number of first connecting pipes, a number of first nozzles are provided on the lower side of the first air pipe, a number of second nozzles are provided on the upper side of the second air pipe, the interiors of the several first air pipes are connected with the interior of the second air box, and the interior of the second air box is connected with the airbag and is provided with a second connecting pipe.
[0016] A drying process for producing hot foil film, comprising the following steps: S1: Feeding: Use the feeding roller to transport the hot stamping film to be dried into the drying box; The hot foil film to be dried is wound onto the unwinding roller. During drying, the film passes through the drying chamber in the middle of the drying box. The second fan draws the air in the drying chamber into the second ventilation chamber through the air suction port. The air then enters the ventilation duct, is filtered by the filter assembly and heated by the electric heating tube to form hot air. The hot air then passes through the ventilation duct and the first fan into the first ventilation chamber and is blown out from the hot air outlet onto the hot foil film being transported. Since the hot air is discharged from three sides of the drying chamber, the air outlet area is increased, improving the drying efficiency and effect. At the same time, some of the hot air will be sucked into the second ventilation chamber through the air suction port, realizing partial recycling of the hot air, which is energy-saving and environmentally friendly. S2: Flattening: Use the first tensioning roller assembly and the second tensioning roller assembly to work symmetrically up and down to maintain appropriate tension on both sides of the hot stamping film to prevent wrinkles or deformation of the hot stamping film; S3: Cleaning: During the flattening process of the hot stamping film, a number of cleaning parts and hot air are used to clean the surface of the hot stamping film; S4: Straightening: using two pairs of second guide rollers to straighten the hot stamping film forward and backward so that the hot stamping film can be placed flat in the drying box; S5: Drying: The air is absorbed into the first air box by a fan, and the air in the first air box is heated by a heater. The heated air enters a plurality of first air pipes and a second air pipe and is ejected upward and downward accordingly, so as to evenly dry the hot paper film upward and downward.
[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention relates to a drying device for producing hot foil film. By configuring a first rotating shaft and a first guide roller, the two first rotating shafts in a first tensioning roller assembly rotate to drive the two first guide rollers, and the two first rotating shafts in a second tensioning roller assembly rotate to drive the two first guide rollers. Thus, the two pairs of first guide rollers, corresponding to each other, rotate synchronously to straighten the center portion of the hot foil film. Furthermore, by configuring a circular tube, a tensioning roller body, and a V-shaped pressure plate, the two V-shaped pressure plates in the first tensioning roller assembly correspond to the two V-shaped pressure plates in the second tensioning roller assembly on either side to create tension on both sides of the hot foil film. Due to the shape of the V-shaped pressure plate, the center of the V-shaped pressure plate first contacts the hot foil film, gradually increasing the contact area between the V-shaped pressure plate and the film. This gradually creates tension from the center to the ends of the film, thereby flattening the film in sections and preventing the first tensioning roller assembly from directly contacting the film over a large area, which could result in uneven tension on the film. The shape of the V-shaped pressure plate has a guiding function, which allows the hot stamping film to naturally extend along the inclined surface during the tensioning process, and cooperates with the force on both sides to effectively suppress the formation of wrinkles.
[0018] The present invention relates to a drying device for producing hot foil. By arranging a cleaning element, a torsion spring, an air cavity, and a nozzle, the cleaning element can be caused to oscillate back and forth due to the periodic intermittent hot air ejected from the nozzle and the elastic force of the torsion spring. This oscillation of the cleaning element cleans the surface of the hot foil. Furthermore, the hot air ejected from the nozzles cleans and dries the surface of the hot foil, increasing the air outlet area and improving drying efficiency and effectiveness. Furthermore, the rotation of the tensioning roller body drives the rotation of the V-shaped pressure plates and the nozzles, and the back-and-forth movement of the tensioning roller body drives the back-and-forth movement of the V-shaped pressure plates and the nozzles, thereby increasing the air outlet area and improving drying efficiency and effectiveness. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0020] The present invention will be further described below with reference to the accompanying drawings and examples.
[0021] Figure 1 It is an isometric structural diagram of the present invention; Figure 2 This is a first isometric structural diagram of the internal structure of the drying box in the present invention; Figure 3 This is a second isometric structural diagram of the internal structure of the drying box in the present invention; Figure 4 Schematic diagram of the isometric structure of the first tensioning roller assembly and the second tensioning roller assembly in the present invention; Figure 5 Schematic diagram of the isometric structure of the tensioning roller body of the present invention; Figure 6 Schematic diagram of the front view of the first rotating shaft in the present invention; Figure 7 It is a schematic diagram of the top view of the structure of the present invention; Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure at AA in the middle; Figure 9 for Figure 7 Schematic diagram of the cross-section structure at the middle BB; Figure 10 Schematic diagram of the front structure of the first tensioning roller assembly in the present invention; Figure 11 for Figure 10 Schematic diagram of the cross-section structure at CC in the middle; Figure 12 for Figure 11 Schematic diagram of the local enlarged structure at G in the middle; Figure 13 for Figure 10 Schematic diagram of the cross-sectional structure at DD in the middle; Figure 14 for Figure 13 Schematic diagram of the local enlarged structure at H in the middle; Figure 15 for Figure 10 Schematic diagram of the cross-sectional structure at EE in the middle; Figure 16 Schematic diagram of the isometric structure of the tensioning roller body of the present invention; Figure 17for Figure 16 Schematic diagram of the cross-sectional structure at FF in the middle; Figure 18 for Figure 17 Schematic diagram of the structure of the local enlarged view at K in the middle.
[0022] Description of reference numerals: Drying box 10, support frame 11, first air box 12, vertical plate 13, discharge roller 14, first rotating shaft 15, first guide roller 16, threaded groove 17, limit frame 18, movable block 19, round tube 20, tensioning roller body 21, V-shaped pressure plate 22, cleaning piece 23, connecting channel 24, torsion spring 25, air cavity 26, nozzle 27, spring 28, airbag 29, annular cavity 30, connecting port 31, bearing 32, sealing ring 33, first gear 34, rack 35, slider 36, first stepper motor 37, second gear 38, second rotating shaft 39, second guide roller 40, second stepper motor 41, third gear 42, fan 43, heater 44, first connecting pipe 45, first air pipe 46, first nozzle 47, second air pipe 48, second nozzle 49, second air box 50, discharge roller 51, second connecting pipe 52. DETAILED DESCRIPTION
[0023] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.
[0024] In the description of the present invention, unless otherwise specified, "plurality" means two or more; terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0025] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.
[0026] As attached Figure 1 To the attached Figure 18 As shown: The invention provides drying equipment for producing hot stamping paper films.
[0027] Refer to the attached Figure 1 To the attached Figure 18 , including a drying box 10, two vertical plates 13 are provided through the front and back of the drying box 10, a discharge roller 14 is provided between one end of the two vertical plates 13, a discharge roller 51 is provided between the other ends of the two vertical plates 13, a first tensioning roller assembly and a second tensioning roller assembly are provided symmetrically between the middle parts of the two vertical plates 13, a plurality of first air pipes 46 are provided at intervals on the upper side of the interior of the drying box 10, and a plurality of second air pipes 48 are provided at intervals on the lower side of the interior of the drying box 10; the first tensioning roller assembly includes two first rotating shafts 15, and a first guide roller 16 is provided on the outer wall of the middle of the two first rotating shafts 15, and the two first guide rollers 16 are provided on the outer wall of the middle part of the drying box 10. A movable block 19 is slidingly provided on the outer wall of both ends of a rotating shaft 15, and a circular tube 20 is rotatably provided between the two movable blocks 19. The outer wall of the circular tube 20 is provided with a tensioning roller body 21, and a plurality of V-shaped pressure plates 22 are slidingly provided in a circular array on the outer wall of the tensioning roller body 21. A plurality of springs 28 are connected between one side of the V-shaped pressure plate 22 and the interior of the tensioning roller body 21. A plurality of cleaning parts 23 are hingedly provided on the outer wall of the other side of the V-shaped pressure plate 22. An air cavity 26 is provided inside the V-shaped pressure plate 22, and a plurality of nozzles 27 are provided on one side of the air cavity 26. A torsion spring 25 is provided at the hinge between the cleaning part 23 and the V-shaped pressure plate 22.
[0028] Preferably, refer to the attached Figure 1 To the attached Figure 3 , Attachment Figure 11 The two ends of the first rotating shaft 15 are respectively connected to the middle of the two vertical plates 13 for rotation. A pair of limit frames 18 are symmetrically fixed on one side of the middle of the two vertical plates 13 close to each other, and the corresponding two movable blocks 19 slide in the pair of limit frames 18 respectively.
[0029] Preferably, refer to the attached Figure 11 , Attachment Figure 12 , Attachment Figure 15 A first gear 34 is provided on the outer wall at both ends of each circular tube 20 , and a rack 35 is fixedly provided inside a pair of limit frames 18 , and the outer wall of the first gear 34 is meshed with one side of the rack 35 .
[0030] Preferably, refer to the attached Figure 6 , Attachment Figure 13 , Attachment Figure 14 The outer walls of both ends of the first rotating shaft 15 are provided with two threaded grooves 17 that are connected to each other at the head and tail. The outer wall of the first rotating shaft 15 is in sliding contact with the interior of the movable block 19. A slider 36 is fixed inside the movable block 19, and the slider 36 spirally slides in the two threaded grooves 17.
[0031] Preferably, refer to the attached Figure 13 , Attachment Figure 14 An airbag 29 is connected between one side of the movable block 19 and the inner side of the limit frame 18. An annular cavity 30 is provided inside the movable block 19. The annular cavity 30 is located on the outer periphery of one end of the circular tube 20. The annular cavity 30 is connected to the interior of the circular tube 20 and is provided with a connecting port 31. The airbag 29 is connected to the annular cavity 30 and is provided with a connecting channel 24.
[0032] Preferably, refer to the attached Figure 12 To the attached Figure 14 Two sealing rings 33 and two bearings 32 are symmetrically provided between the outer wall of one end of the circular tube 20 and the interior of the movable block 19. The two sealing rings 33 are located on both sides of the annular cavity 30, and the two bearings 32 are respectively located on the side away from each other of the two sealing rings 33.
[0033] Preferably, refer to the attached Figure 1 To the attached Figure 4 The structure of the first tensioning roller assembly is the same as that of the second tensioning roller assembly. Two first stepper motors 37 are installed on one vertical plate 13, and a second gear 38 is respectively provided at one end of the two first rotating shafts 15. The outer walls of the two second gears 38 in the first tensioning roller assembly are respectively engaged with the outer walls of the two second gears 38 in the second tensioning roller assembly. A support frame 11 is provided on the lower side of the drying box 10.
[0034] Preferably, refer to the attached Figure 2 , Attachment Figure 3 , Attachment Figure 8 Two straightening assemblies are provided between the middle parts of the two vertical plates 13. The two straightening assemblies are located on the front and rear sides of the first tensioning roller assembly. A second stepping motor 41 is provided at one end of the straightening assembly; the straightening assembly includes two second rotating shafts 39, and a second guide roller 40 is respectively provided on the outer walls of the two second rotating shafts 39. A third gear 42 is respectively provided at one end of the two second rotating shafts 39. The outer walls of the two third gears 42 are meshed, and the output end of the second stepping motor 41 is connected to one end of one of the second rotating shafts 39.
[0035] Preferably, refer to the attached Figure 1 , Attachment Figure 7 To the attached Figure 9 , Attachment Figure 14A first air box 12 is provided on the upper side of the drying box 10, and a second air box 50 is provided on both sides of the interior of the drying box 10. A fan 43 is provided on one side of the interior of the first air box 12, and a heater 44 is provided inside the first air box 12. The interior of the first air box 12 is connected to a number of first air pipes 46 and a number of second air pipes 48 and is provided with a number of first connecting pipes 45. A number of first nozzles 47 are provided on the lower side of the first air pipes 46, and a number of second nozzles 49 are provided on the upper side of the second air pipes 48. The interiors of the several first air pipes 46 are all connected to the interior of the second air box 50, and the interior of the second air box 50 is connected to the airbag 29 and is provided with a second connecting pipe 52.
[0036] A drying process for producing hot foil film, comprising the following steps: S1: Feeding: Use the feeding roller to transport the hot stamping film to be dried into the drying box; The hot foil film to be dried is wound onto the unwinding roller. During drying, the film passes through the drying chamber in the middle of the drying box. The second fan draws the air in the drying chamber into the second ventilation chamber through the air suction port. The air then enters the ventilation duct, is filtered by the filter assembly and heated by the electric heating tube to form hot air. The hot air then passes through the ventilation duct and the first fan into the first ventilation chamber and is blown out from the hot air outlet onto the hot foil film being transported. Since the hot air is discharged from three sides of the drying chamber, the air outlet area is increased, improving the drying efficiency and effect. At the same time, some of the hot air will be sucked into the second ventilation chamber through the air suction port, realizing partial recycling of the hot air, which is energy-saving and environmentally friendly. S2: Flattening: Use the first tensioning roller assembly and the second tensioning roller assembly to work symmetrically up and down to maintain appropriate tension on both sides of the hot stamping film to prevent wrinkles or deformation of the hot stamping film; S3: Cleaning: During the flattening process of the hot stamping film, a number of cleaning parts and hot air are used to clean the surface of the hot stamping film; S4: Straightening: using two pairs of second guide rollers to straighten the hot stamping film forward and backward so that the hot stamping film can be placed flat in the drying box; S5: Drying: The air is absorbed into the first air box by a fan, and the air in the first air box is heated by a heater. The heated air enters a plurality of first air pipes and a second air pipe and is ejected upward and downward accordingly, so as to evenly dry the hot paper film upward and downward.
[0037] Specific use of the present invention: First, the unwinding roller 14 rotates to convey the hot foil film to be dried into the drying box 10, passing it between the first and second tensioning roller assemblies. At this point, the control system operates the two first stepper motors 37. These motors 37 activate and engage with the two pairs of second gears 38, causing the four first rotating shafts 15 to rotate synchronously. The two first stepper motors 37 drive the two first rotating shafts 15 in the first tensioning roller assembly. The outer walls of each pair of second gears 38 engage, causing the two first rotating shafts 15 in the first tensioning roller assembly to rotate. The two pairs of second gears 38 then synchronously drive the two first rotating shafts 15 in the second tensioning roller assembly. Among them, the two first rotating shafts 15 in the first tensioning roller assembly rotate to drive the two first guide rollers 16 to rotate, and the two first rotating shafts 15 in the second tensioning roller assembly rotate to drive the two first guide rollers 16 to rotate, so that the two pairs of first guide rollers 16 corresponding to the upper and lower sides can rotate synchronously, so as to straighten the middle part of the ironing paper film forward and backward, pre-stretch the ironing paper film before drying, and reduce shrinkage during the drying process.
[0038] Simultaneously, the two first rotating shafts 15 in the first tensioning roller assembly rotate, allowing a slider 36 to spirally slide within two interconnected threaded grooves 17. The rotation of the first rotating shaft 15 uses the two threaded grooves 17 to helically guide the slider 36, thereby causing the movable block 19 to move back and forth within the limit frames 18. The two pairs of movable blocks 19 in the first tensioning roller assembly move away from or toward each other within the four limit frames 18. This movement of the two pairs of movable blocks 19 moves the two circular tubes 20 away from each other. Because the two first gears 34 at each end of the circular tube 20 engage with the two racks 35 within the two limit frames 18, the two circular tubes 20 rotate as they move away from each other.
[0039] Next, the rotation of the two circular tubes 20 in the first tensioning roller assembly drives the rotation of the two tensioning roller bodies 21. This rotation of the tensioning roller bodies 21 drives the rotation of the V-shaped pressure plates 22. The V-shaped pressure plates 22 rotate and come into contact with the hot foil film. One side of the V-shaped pressure plates 22 is pressed against the hot foil film, causing the V-shaped pressure plates 22 to slide within the tensioning roller body 21. The sliding of the V-shaped pressure plates 22 compresses the springs 28, generating a force that presses one side of the V-shaped pressure plates 22 into contact with the hot foil film. This allows the two V-shaped pressure plates 22 in the first tensioning roller assembly to correspond vertically with the two V-shaped pressure plates 22 in the second tensioning roller assembly, thereby creating tension on both sides of the hot foil film. Due to the shape of the V-shaped pressure plate 22, the center of the V-shaped pressure plate 22 first contacts the hot foil film, gradually increasing the contact area between the V-shaped pressure plate 22 and the film. This allows the film to be tensioned gradually from the center toward the ends, thus achieving a segmented flattening effect on the film. This prevents the first tensioning roller assembly from directly contacting the film over a large area, which could result in uneven tension on the film. Furthermore, the shape of the V-shaped pressure plate 22 provides a guiding effect, allowing the film to naturally stretch along the inclined surface during tensioning. This, combined with the tensile forces on both sides, effectively prevents wrinkles, making it particularly suitable for thin films. Because the center of the V-shaped pressure plate 22 first contacts and then breaks away from the film, the center and ends of the V-shaped pressure plate 22 spend equal time in contact with the film, ensuring uniform tension on the film.
[0040] Next, the control system controls the two straightening components to start, and the second stepper motor 41 starts to drive one of the second rotating shafts 39 to rotate. By utilizing the engagement of the two third gears 42, the rotation of one of the second rotating shafts 39 drives the rotation of the other second rotating shaft 39, thereby enabling the two second rotating shafts 39 to rotate synchronously. The rotation of the two second rotating shafts 39 drives the rotation of the two second guide rollers 40. The rotation of the two second guide rollers 40 pulls the ironing paper film, so that the ironing paper film can be straightened forward and backward by the two straightening components, and the ironing paper film is pre-stretched before drying to reduce shrinkage during the drying process.
[0041] The control system then controls the fan 43, which draws air into the first air box 12. The heater 44 activates, heating the air within the first air box 12. The hot air within the first air box 12 flows through a plurality of first connecting pipes 45 and enters a plurality of first air pipes 46 and a plurality of second air pipes 48. A portion of the hot air within the first air pipes 46 is ejected downward through a plurality of first nozzles 47, while another portion enters the two second air boxes 50. The hot air within the second air pipes 48 is ejected upward through a plurality of second nozzles 49, thereby creating vertical convection of the hot air within the drying box 10, evenly drying the hot foil film.
[0042] At the same time, the hot air within the two second air boxes 50 enters the eight air bags 29 through the eight second connecting pipes 52. The movable block 19 moves back and forth within the limiting frame 18, squeezing and releasing the air bags 29. When the movable block 19 moves to squeeze the air bags 29, the hot air within the air bags 29 enters the annular cavity 30 through the connecting channel 24. The hot air within the annular cavity 30 enters the circular tube 20 through the connecting port 31. The hot air within the circular tube 20 enters the air cavities 26 within the V-shaped pressure plates 22, and the hot air within the air cavities 26 is ejected through the nozzles 27. The force of the ejected hot air propels the cleaning member 23 to swing. The swinging of the cleaning member 23 twists the torsion spring 25, generating an elastic force. When the movable block 19 moves to release the air bags 29, the nozzles 27 stop ejecting air, and the elastic force of the torsion spring 25 causes the cleaning member 23 to swing back to its original position. The periodic intermittent jetting of hot air from the nozzles 27 and the elastic force of the torsion spring 25 cause the cleaning member 23 to swing back and forth. This swinging of the cleaning member 23 cleans the surface of the hot foil film. The hot air ejected from the nozzles 27 cleans and dries the surface of the hot foil film. The rotation of the tensioning roller body 21 drives the rotation of the V-shaped pressure plates 22 and the nozzles 27, and the back-and-forth movement of the tensioning roller body 21 drives the back-and-forth movement of the V-shaped pressure plates 22 and the nozzles 27. This increases the air outlet area and improves drying efficiency and effectiveness.
[0043] Finally, the discharge roller 51 is rotated to transport the hot stamping film out of the drying box 10 .
[0044] The present invention provides a drying device for producing hot stamping film. Through the arrangement of the first rotating shaft 15 and the first guide roller 16, the two first rotating shafts 15 in the first tensioning roller assembly rotate to drive the two first guide rollers 16 to rotate, and the two first rotating shafts 15 in the second tensioning roller assembly rotate to drive the two first guide rollers 16 to rotate, so that the two pairs of first guide rollers 16 corresponding to each other can rotate synchronously, so as to facilitate the front and back straightening of the middle part of the hot stamping film. The circular tube 20, the tensioning roller body 21, and the V-shaped pressure plate 22 are arranged so that the two V-shaped pressure plates 22 in the first tensioning roller assembly correspond vertically with the two V-shaped pressure plates 22 in the second tensioning roller assembly, thereby creating tension on both sides of the film. Due to the shape of the V-shaped pressure plates 22, the center of the V-shaped pressure plates 22 first contacts the film, gradually increasing the contact area between the V-shaped pressure plates 22 and the film. This gradually creates tension from the center toward the ends of the film, thereby flattening the film in sections and preventing direct, large-scale contact between the first tensioning roller assembly and the film, which could result in uneven tension. The shape of the V-shaped pressure plates 22 also acts as a guide, allowing the film to naturally extend along the inclined surface during tensioning, effectively preventing wrinkles from forming as the force is applied on both sides.
[0045] The present invention relates to a drying device for producing hot foil. By arranging a cleaning element 23, a torsion spring 25, an air cavity 26, and a nozzle 27, the cleaning element 23 can be caused to oscillate back and forth by the periodic intermittent jet of hot air from the nozzle 27 and the elastic force of the torsion spring 25. The back-and-forth swinging of the cleaning element 23 cleans the surface of the hot foil. Furthermore, the hot air ejected from the nozzles 27 cleans and dries the surface of the hot foil, increasing the air outlet area and improving drying efficiency and effectiveness. Furthermore, the rotation of the tensioning roller body 21 drives the rotation of the V-shaped pressure plates 22 and the nozzle 27, and the back-and-forth movement of the tensioning roller body 21 drives the back-and-forth movement of the V-shaped pressure plates 22 and the nozzle 27, thereby increasing the air outlet area and improving drying efficiency and effectiveness.
[0046] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.
Claims
1. A drying device for producing hot foil film, characterized by: The invention comprises a drying box (10), wherein two vertical plates (13) are provided through the front and rear of the drying box (10), a discharge roller (14) is rotatably provided between one end of the two vertical plates (13), a discharge roller (51) is rotatably provided between the other ends of the two vertical plates (13), a first tensioning roller assembly and a second tensioning roller assembly are symmetrically provided between the middle parts of the two vertical plates (13), a plurality of first air pipes (46) are provided at intervals on the upper side of the interior of the drying box (10), and a plurality of second air pipes (48) are provided at intervals on the lower side of the interior of the drying box (10); The first tensioning roller assembly comprises two first rotating shafts (15), a first guide roller (16) is respectively provided on the outer wall of the middle part of the two first rotating shafts (15), a movable block (19) is slidably provided on the outer wall of both ends of the two first rotating shafts (15), a circular tube (20) is rotatably provided between the two movable blocks (19), the outer wall of the circular tube (20) is provided with a tensioning roller body (21), a plurality of V-shaped pressure plates (22) are slidably provided on the outer wall of the tensioning roller body (21), a plurality of springs (28) are connected between one side of the V-shaped pressure plate (22) and the interior of the tensioning roller body (21), a plurality of cleaning parts (23) are hingedly provided on the outer wall of the other side of the V-shaped pressure plate (22), an air cavity (26) is provided inside the V-shaped pressure plate (22), a plurality of nozzles (27) are provided on one side of the air cavity (26), and a torsion spring (25) is provided at the hinge between the cleaning part (23) and the V-shaped pressure plate (22).
2. The drying equipment for producing hot foil film according to claim 1, characterized in that: The two ends of the first rotating shaft (15) are respectively rotatably connected to the middle parts of the two vertical plates (13); a pair of limit frames (18) are symmetrically fixed on one side of the middle parts of the two vertical plates (13) close to each other, and the corresponding two movable blocks (19) slide in the pair of limit frames (18).
3. The drying equipment for producing hot foil film according to claim 2, characterized in that: A first gear (34) is provided on the outer walls at both ends of each circular tube (20), and a rack (35) is fixedly provided inside a pair of limit frames (18), and the outer wall of the first gear (34) is meshed with one side of the rack (35).
4. The drying equipment for producing hot stamping film according to claim 3, characterized in that: The outer walls at both ends of the first rotating shaft (15) are provided with two threaded grooves (17) that are interconnected at the head and tail ends. The outer wall of the first rotating shaft (15) is in sliding contact with the interior of the movable block (19). A slider (36) is fixedly provided inside the movable block (19), and the slider (36) spirally slides in the two threaded grooves (17).
5. The drying equipment for producing hot stamping film according to claim 2, characterized in that: An air bag (29) is connected between one side of the movable block (19) and one side of the interior of the limiting frame (18); an annular cavity (30) is provided inside the movable block (19); the annular cavity (30) is located outside one end of the circular tube (20); a connecting port (31) is provided between the annular cavity (30) and the interior of the circular tube (20); and a connecting channel (24) is provided between the air bag (29) and the annular cavity (30).
6. The drying equipment for producing hot foil film according to claim 5, characterized in that: Two sealing rings (33) and two bearings (32) are symmetrically provided between the outer wall of one end of the circular tube (20) and the interior of the movable block (19). The two sealing rings (33) are located on both sides of the annular cavity (30), and the two bearings (32) are respectively located on the sides of the two sealing rings (33) that are away from each other.
7. The drying equipment for producing hot stamping film according to claim 6, characterized in that: The structure of the first tensioning roller assembly is the same as that of the second tensioning roller assembly, wherein two first stepper motors (37) are installed on one of the vertical plates (13), one end of each of the two first rotating shafts (15) is provided with a second gear (38), the outer walls of the two second gears (38) in the first tensioning roller assembly are respectively engaged with the outer walls of the two second gears (38) in the second tensioning roller assembly, and a support frame (11) is provided on the lower side of the drying box (10).
8. The drying equipment for producing hot foil film according to claim 1, characterized in that: Two straightening assemblies are provided between the middle parts of the two vertical plates (13), and the two straightening assemblies are located on the front and rear sides of the first tensioning roller assembly. A second stepping motor (41) is provided at one end of the straightening assembly; the straightening assembly includes two second rotating shafts (39), and a second guide roller (40) is provided on the outer wall of each of the two second rotating shafts (39). A third gear (42) is provided at one end of each of the two second rotating shafts (39), and the outer walls of the two third gears (42) are meshed, and the output end of the second stepping motor (41) is connected to one end of one of the second rotating shafts (39).
9. The drying equipment for producing hot foil film according to claim 5, characterized in that: A first air box (12) is provided on the upper side of the drying box (10), and a second air box (50) is provided on both sides of the interior of the drying box (10). A fan (43) is provided on one side of the interior of the first air box (12), and a heater (44) is provided inside the first air box (12). The interior of the first air box (12) is connected to a plurality of first air pipes (46) and a plurality of second air pipes (48) and is provided with a plurality of first connecting pipes (45). A plurality of first nozzles (47) are provided on the lower side of the first air pipe (46), and a plurality of second nozzles (49) are provided on the upper side of the second air pipe (48). The interiors of the plurality of first air pipes (46) are all connected to the interior of the second air box (50), and the interior of the second air box (50) is connected to the air bag (29) and is provided with a second connecting pipe (52).
10. A drying process for producing hot stamping film, comprising the drying equipment for producing hot stamping film according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Feeding: Use the feeding roller to transport the hot stamping film to be dried into the drying box; The hot foil film to be dried is wound onto the unwinding roller. During drying, the film passes through the drying chamber in the middle of the drying box. The second fan draws the air in the drying chamber into the second ventilation chamber through the air suction port. The air then enters the ventilation duct, is filtered by the filter assembly and heated by the electric heating tube to form hot air. The hot air then passes through the ventilation duct and the first fan into the first ventilation chamber and is blown out from the hot air outlet onto the hot foil film being transported. Since the hot air is discharged from three sides of the drying chamber, the air outlet area is increased, improving the drying efficiency and effect. At the same time, some of the hot air will be sucked into the second ventilation chamber through the air suction port, realizing partial recycling of the hot air, which is energy-saving and environmentally friendly. S2: Flattening: Use the first tensioning roller assembly and the second tensioning roller assembly to work symmetrically up and down to maintain appropriate tension on both sides of the hot stamping film to prevent wrinkles or deformation of the hot stamping film; S3: Cleaning: During the flattening process of the hot stamping film, a number of cleaning parts and hot air are used to clean the surface of the hot stamping film; S4: Straightening: using two pairs of second guide rollers to straighten the hot stamping film forward and backward so that the hot stamping film can be placed flat in the drying box; S5: Drying: The air is absorbed into the first air box by a fan, and the air in the first air box is heated by a heater. The heated air enters a plurality of first air pipes and a second air pipe and is ejected upward and downward accordingly, so as to evenly dry the hot paper film upward and downward.