A drying device and drying method for a film

Abstract

The present invention relates to the technical field of drying devices, and particularly relates to a drying device and a drying method for films, including a box body and a conveying unit arranged inside the box body. A placement rack is installed on the conveying chain, and the placement rack is used for placing films; guide rails fixed to the box body are arranged on both sides of the placement rack, and the guide rails have upper abutting surfaces arranged horizontally and parallel to the conveying direction of the conveying chain; the placement rack is rotatably connected to the conveying chain through a rotating shaft, and stoppers are arranged on both sides of the placement rack; when the placement rack moves along the conveying direction of the conveying unit, the stoppers are supported on the upper abutting surfaces, and the placement rack is in an inclined state through the limitation of the rotating shaft and the stoppers, and the film is inclined upwards with one side along with the placement rack; a flipping assembly for rotating the placement rack is arranged along the conveying direction of the conveying unit. By flipping the film on the placement rack, the present invention can dry both sides of the film under the condition of conveying the film once.

Description

Technical Field

[0001] The present invention relates to the technical field of drying devices, and particularly relates to a drying device and a drying method for films. Background Art

[0002] With the development of science and technology, there are more and more types of films, such as dry films, medical color films, laser films, etc. These films are applied in the medical field and have a huge market demand. In the film production process, a drying process is required.

[0003] A Chinese patent document with the authorization announcement number CN211316859U discloses a film drying device, which includes a conveying unit and a box body. The conveying unit horizontally penetrates through the bottom of the box body to continuously convey the film. The box body contains an air inlet unit, a drying unit, and an air exhaust unit. The air inlet unit is arranged on one side above the box body and is connected to the box body for introducing gas. The drying unit includes an air suction fan and a drying air chamber. The air suction fan is fixedly connected to the upper side inside the box body, and the drying air chamber is fixed to the upper side inside the box body through a connecting member. The air suction fan is located inside the connecting member to guide the hot air in the box body into the drying air chamber. Nozzles are evenly arranged at the lower part of the drying air chamber. The air exhaust unit is arranged on one side of the box body above relative to the air inlet unit and is connected to the box body. The air exhaust unit is used to discharge part of the hot air in the box body. The film on the conveying unit is placed horizontally, and one side faces the nozzles, so that the film sequentially passes under the nozzles along with the conveying of the conveying unit to complete the drying of the film.

[0004] However, since both sides of the film need to be dried, the film conveyed by the conveying unit is horizontally arranged, and the side of the film facing away from the nozzles cannot be dried by hot air. Only after one side of the film is dried, the film needs to be placed reversely at the initial position of the conveying unit again, and then dried again, or multiple film drying devices are used in series to form a film drying system, and at least two film drying devices are used to dry the two sides of the film respectively. Summary of the Invention

[0005] The present invention provides a drying device and a drying method for films, aiming to solve the problem that both sides of the film cannot be dried under the condition of passing through once during the process of the film moving with the conveying unit.

[0006] A drying device for a film according to the present invention includes a box body and a conveying unit disposed inside the box body. The conveying unit includes a conveying chain and placing racks uniformly arranged along the conveying chain, and the placing racks are installed on the conveying chain. Films are to be placed on the placing racks. Guide rails fixed to the box body are provided on both sides of the placing racks, and the guide rails have upper abutting surfaces horizontally arranged and parallel to the conveying direction of the conveying chain. The placing racks are rotatably connected to the conveying chain through a rotating shaft, and stoppers are provided on both sides of the placing racks. When the placing racks move along the conveying direction of the conveying unit, the stoppers are supported on the upper abutting surfaces, and the placing racks are in an inclined state due to the limitation of the rotating shaft and the stoppers, and the films are inclined upward along with one side of the placing racks. A turning assembly for turning the placing racks is provided along the conveying direction of the conveying unit. The turning assembly is fixedly arranged inside the box body. Before and after the placing racks pass through the turning assembly, both sides of the films are inclined upward. An air blowing head is arranged inside the box body. The air blowing head is connected to a blower, and the air blowing head is used to dry the upper surfaces of the films before and after the turning assembly.

[0007] The effect is as follows: The placing racks are uniformly arranged on the conveying chain. When the placing racks move along with the conveying chain in the conveying direction of the conveying unit, the placing racks are located at the upper part of the conveying chain. And due to the stoppers on the placing racks being supported on the upper abutting surfaces of the guide rails, the upper part of the placing racks is in a state inclined towards the initial end of the conveying unit. At this time, the blower connected to the air blowing head blows air to dry the upper surface of the film. At the same time, when the placing racks pass through the turning assembly during the continuous movement along with the conveying chain, the upper part of the placing racks will rotate towards the end of the conveying unit, and the stoppers will abut against the upper abutting surfaces again. The films on the placing racks are inclined upward on the other side due to the rotation of the placing racks. At this time, the air blowing head can blow air to dry the inclined upward surface of the film, so that both sides of the film can be dried during one movement of the conveying unit.

[0008] Preferably, two air blowing heads are provided and respectively correspond to two placing racks before and after the turning assembly. An installation rack is arranged inside the box body. A guiding rod that slides vertically is arranged on the installation rack. The air blowing head is fixed to the lower end of the guiding rod. When the placing racks move along with the conveying chain, they abut against the air blowing heads, and the air blowing heads move up and down along the placing racks due to the arrangement of the guiding rods.

[0009] The effect is as follows: The two air blowing heads respectively correspond to two placing racks before and after the turning assembly. The two air blowing heads can dry two films simultaneously. The guiding rod is slidably connected vertically on the installation rack, enabling the air blowing heads to approach the films for drying. Then, during the movement of the placing racks, the air blowing heads move up and down to adapt to drying different height positions. Since the air blowing heads are closer to the films, the drying effect on the films can be better.

[0010] Preferably, a transmission assembly is provided on the mounting frame. The transmission assembly includes a gear, a rack, and a rotating shaft. The rotating shaft is rotatably connected to the mounting frame. Two racks are coaxially and fixedly arranged on the rotating shaft. The racks are arranged along the length direction of the guide rod. The gear meshes with the racks, and the two racks are respectively located on both sides of the rotating shaft.

[0011] The effect is that: one rack is arranged on each side of the rotating shaft, and the two racks mesh with the gear on the rotating shaft. Thus, when one blowing head moves upward, the other blowing head moves downward, enabling the two blowing heads to adapt to the two inclined placement racks with less effort.

[0012] Preferably, a counterweight is provided on the blowing head corresponding to the placement rack inclined towards the initial end of the conveying unit.

[0013] The effect is that: the setting of the counterweight can make the gravity of one blowing head greater than that of the other blowing head, ensuring that the blowing head with the counterweight abuts against the placement rack. Since the placement rack corresponding to the counterweight is inclined towards the initial end of the conveying unit, the blowing head can maintain a movement from bottom to top, and the blowing head on the other side can automatically cross the highest point of the placement rack under the action of the transmission assembly without the need for other power sources, and the setting is relatively simple.

[0014] Preferably, a fixing frame is provided inside the box body. The mounting frame is horizontally slidably connected to the fixing frame along the conveying direction of the conveying unit. A driving assembly for driving the mounting frame to reciprocate is installed on the fixing frame, and the reciprocating movement position moves along the conveying direction of the conveying unit.

[0015] The effect is that: the mounting frame is slidably connected to the fixing frame along the conveying direction of the conveying unit. Since the blowing head may stay at one position for a long time when passing over the film once, causing damage to the film, it reciprocates multiple times under the action of the driving assembly, enabling the film to achieve the drying effect and reducing damage to the film.

[0016] Preferably, the driving assembly includes a driving motor and a driving screw. The driving motor is fixed on the fixing frame. The driving screw is arranged along the moving direction of the mounting frame. The driving screw is coaxially connected to the output shaft of the driving motor, and the driving screw is threadedly connected to the mounting frame.

[0017] The effect is that: the driving motor drives the mounting frame to move along the length direction of the driving screw through the driving screw, thereby enabling the mounting frame to reciprocate.

[0018] Preferably, the driving assembly includes a driving motor, a synchronous pulley, and a synchronous belt. The driving motor is fixed on the mounting bracket. There are two synchronous pulleys. One synchronous pulley is coaxially fixed on the output shaft of the driving motor, and the other synchronous pulley is rotatably mounted on the fixing bracket. The synchronous belt is drivingly connected between the two synchronous pulleys, and the conveying direction of the synchronous belt is parallel to the moving direction of the mounting bracket. The mounting bracket is fixed on the synchronous belt.

[0019] Preferably, the flipping assembly includes a base and a vertical rod. A push rod is provided on the placing rack deviating from the rotating shaft and on the side of the rotating shaft away from the stopper. The lower end of the vertical rod is rotatably connected to the base. When the vertical rod is vertically arranged, the upper end of the vertical rod is located on the moving path of the push rod. A tension spring is arranged between the base and the vertical rod. A first positioning block is fixedly arranged on the base, and a second positioning block is fixedly arranged on the vertical rod. The elastic force of the tension spring is used to drive the second positioning block to abut against the first positioning block and keep the vertical rod in a vertical state. The torque direction of the push rod on the vertical rod is opposite to the torque direction of the tension spring on the vertical rod.

[0020] The effect is that when the second positioning block abuts against the first positioning block, the tension spring is in a stretched state, and the elastic force of the tension spring is sufficient to rotate the push rod. After the placing rack rotates, the push rod presses the vertical rod again, so that the vertical rod stretches the tension spring again, so that the push rod can cross the flipping assembly.

[0021] Preferably, the placing rack is integrally U-shaped, and a groove for placing the edge of the film is provided on the inner side wall of the U-shape formed by the placing rack; when the placing rack is used to convey the film, the opening of the U-shape formed by the placing rack is inclined upward; when the placing rack reaches the end of the conveying unit, the opening of the U-shape formed by the placing rack rotates downward.

[0022] The effect is that the placing rack is arranged in a U-shaped structure, so that the film rotates within the U-shaped structure formed by the placing rack, which is convenient for installing the film. And the opening of the U-shape formed by the placing rack is inclined upward to ensure that the film will not fall off. At the same time, after the placing rack reaches the end of the conveying unit, the dried film will automatically slide out of the placing rack.

[0023] In a drying method for a film of the present invention, the film is inclined and moves along with the conveying unit. The film is flipped during the conveying process. Before and after the film is flipped, both sides of the film are inclined upward, and the inclined upward side is blown and dried before and after the film is flipped.

[0024] The effect is that the film is flipped during the conveying process, so that both sides of the film are inclined upward before and after the flipping, thereby facilitating blowing and drying of both sides of the film.

[0025] Adopting the above technical solutions, the beneficial effects of the present invention are:

[0026] In the present invention, the placing rack is supported on the upper abutting surface of the guide rail by the block, so that the upper part of the placing rack is in a state of tilting towards the initial end of the conveying unit. At this time, the blower connected to the blowing head blows air on the upper surface of the film for drying. At the same time, when the placing rack continues to move along with the conveying chain and passes through the flipping assembly, the upper part of the placing rack will rotate towards the end of the conveying unit, and the block will abut against the upper abutting surface again. The film on the placing rack is tilted upwards on the other side due to the rotation of the placing rack. At this time, the blowing head can blow air on the surface of the film tilted upwards for drying, so that both sides of the film can be dried during one movement of the conveying unit. Since the placing rack corresponding to the counterweight block tilts towards the initial end of the conveying unit, the blowing head can maintain a movement from bottom to top, and the blowing head on the other side can automatically cross the highest point of the placing rack under the action of the transmission assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 FIG. 6 is a schematic diagram of the overall structure of a film drying device in Embodiment 1 of the present invention;

[0028] Figure 2 FIG. 7 is a schematic diagram of the structure of the film drying device in Embodiment 1 of the present invention with the box body cut open;

[0029] Figure 3 FIG. 8 is a schematic diagram of the structure of the conveying unit in Embodiment 1 of the present invention;

[0030] Figure 4 FIG. Figure 3 is an enlarged view of part A in FIG.

[0031] Figure 5 FIG. 9 is a schematic diagram of the structure of the guide rail with the pulley cut open in Embodiment 1 of the present invention;

[0032] Figure 6 FIG. 10 is a sectional view of the flipping assembly in Embodiment 1 of the present invention;

[0033] Figure 7 FIG. 11 is a schematic diagram of the connection structure of the mounting rack in Embodiment 1 of the present invention;

[0034] Figure 8 FIG. 12 is a schematic diagram of the structure of the blowing head in Embodiment 1 of the present invention;

[0035] Figure 9 FIG. 13 is a schematic diagram of the connection structure of the mounting rack in Embodiment 2 of the present invention.

[0036] Reference Signs:

[0037] 1. Box body; 11. Fan; 12. Air collecting hood; 13. Heater; 14. Air pipe; 15. Inlet; 16. Outlet; 17. Hose; 2. Conveying unit; 21. Conveyor chain; 22. Placing rack; 23. Trolley; 231. Roller; 24. Rotating shaft; 25. Stop block; 26. Pushing rod; 27. Supporting wheel; 3. Blowing head; 31. Housing; 32. Air duct; 33. Air nozzle; 4. Film; 5. Flipping assembly; 51. Base; 52. Vertical rod; 53. Tension spring; 54. First positioning block; 55. Second positioning block; 6. Guide rail; 61. Upper abutting surface; 62. Guide groove; 71. Mounting bracket; 72. Guide rod; 73. Fixed bracket; 8. Transmission assembly; 81. Gear; 82. Rack; 83. Rotating shaft; 9. Driving assembly; 91. Driving motor; 92. Driving screw; 93. Synchronous pulley; 94. Synchronous belt. Detailed implementation manners

[0038] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0039] The following combines Figures 1 to 9 to describe a drying device and a drying method for a film of the present invention.

[0040] Embodiment 1

[0041] This embodiment discloses a drying device for a film. As shown in Figure 1 and Figure 2 , it includes a box body 1. A fan 11 is arranged at the top of the box body 1. An air collecting hood 12 is arranged below the fan 11. The lower part of the air collecting hood 12 communicates with the inside of the box body 1 from the top of the box body 1. The air inlet end of the fan 11 is communicated with the air collecting hood 12, so that the hot air in the box body 1 is collected through the air collecting hood 12 and extracted through the fan 11. A heater 13 is arranged at one end of the outlet 16 of the fan 11. The heater 13 is used to heat the hot air extracted by the fan 11 to compensate for the temperature drop generated during the drying process. The heater 13 has a structure with heating wires inside the shell. The gas generated after drying can also be purified, for example, by burning the organic matter in the hot air or adsorbing harmful gases by passing the hot air through activated carbon. An air pipe 14 is connected to the heater 13. The gas extracted from the box body 1 is sent into the box body 1 again through the air pipe 14 to dry the film 4. A conveying unit 2 is arranged inside the box body 1. The conveying unit 2 is horizontally arranged. The conveying unit 2 is used to convey the film 4. The film 4 is in the shape of a rectangular sheet. The conveying unit 2 is located at the bottom of the box body 1.

[0042] Refer to Figure 1 and Figure 2, the box body 1 is provided with an inlet 15 at the initial end of the conveying unit 2 and an outlet 16 at the end of the conveying unit 2. The film 4 is placed on the conveying unit 2 at the position of the inlet 15 and taken off the conveying unit 2 at the position of the outlet 16. A blowing head 3 is arranged inside the box body 1. The blowing head 3 is connected to the air pipe 14 through a hose 17. The blowing head 3 is arranged facing the film 4, so that the hot air conveyed by the blower 11 through the blowing head 3 dries the film 4.

[0043] Reference Figure 3 , the conveying unit 2 includes a conveying chain 21 and a placement rack 22 installed on the conveying chain 21. The placement rack 22 is of a U-shaped structure. One conveying chain 21 can be arranged on each side of the placement rack 22. When the placement rack 22 conveys the film 4, the opening of the U shape formed by the placement rack 22 is inclined upward. The film 4 is placed inside the U shape formed by the placement rack 22, and the film 4 is arranged parallel to the U-shaped placement rack 22. The placement rack 22 is rotatably arranged on the conveying chain 21. A flipping assembly 5 is arranged inside the box body 1. The flipping assembly 5 is used to rotate the placement rack 22 during the process of conveying the film 4, so as to change the inclination direction of the upper end of the placement rack 22. In this embodiment, the upper end of the placement rack 22 inclines towards the initial end of the conveying unit 2 before the placement rack 22 passes through the flipping assembly 5, and the upper end of the placement rack 22 inclines towards the end of the conveying unit 2 after the placement rack 22 passes through the flipping assembly 5. Since the film 4 inclines upward on both sides with the flipping of the placement rack 22 before and after the placement rack 22 passes through the flipping assembly 5, the blowing head 3 inside the box body 1 can dry the two sides of the film 4 that are inclined upward respectively, so as to achieve the effect of drying both sides of the film 4 when the conveying unit 2 passes through once. At the same time, the opening of the U shape formed by the placement rack 22 facilitates the installation of the film 4, and there is no need to fix the film 4, which is convenient for taking the film 4 off the placement rack 22; when the film 4 on the placement rack 22 is blown by the blowing head 3, it will not slide out from the opening of the U shape formed by the placement rack 22, ensuring that the film 4 moves smoothly with the conveying unit 2.

[0044] Reference Figure 3 , Figure 4 and Figure 5, a guide rail 6 is arranged along the conveying chain 21. The guide rail 6 is fixed on the inner wall of the box body 1. The guide rail 6 at least includes an upper abutting surface 61 and a guide groove 62. The guide groove 62 is arranged along the length direction of the guide rail 6. A sliding carriage 23 is connected in the guide groove 62. The sliding carriage 23 is fixed on the conveying chain 21, and the sliding carriage 23 can move along the guide groove 62 under the action of the conveying chain 21. A guide rail 6 is respectively arranged on both sides of the placement rack 22, and a rotating shaft 24 is fixedly arranged on the placement rack 22, so that the placement rack 22 is rotatably connected to the sliding carriage 23 through the rotating shaft 24. The sliding carriage 23 in this embodiment at least includes three rollers 231, so that the rollers 231 rotate and abut against the inner wall of the guide groove 62, so that the position of the sliding carriage 23 in the guide groove 62 is stable. When the sliding carriage 23 moves along the guide groove 62 under the action of the conveying chain 21, the placement rack 22 also moves along with the conveying chain 21. The length of the guide rail 6 can be set in a circle along the conveying chain 21, or can be not set at the lower part of the conveying chain 21, so that the sliding carriage 23 enters the guide groove 62 at both ends of the guide rail 6. Since the placement rack 22 rotates to the lower part of the conveying chain 21 along with the conveying chain 21, the placement rack 22 rotates to the vertically downward state under the action of gravity.

[0045] Blocking blocks 25 are fixedly arranged on both sides of the placement rack 22. The blocking blocks 25 can also be set as rolling parts, such as bearings. The blocking blocks 25 are arranged at intervals with the rotating shaft 24. The blocking blocks 25 are located at the position of the central axis of the side part of the placement rack 22. When the placement rack 22 conveys the film 4, the blocking blocks 25 on the placement rack 22 support on the upper abutting surface 61, and when the placement rack 22 moves, the blocking blocks 25 also move on the abutting surface. The distance between the blocking blocks 25 and the rotating shaft 24 depends on the inclination angle of the placement rack 22. The inclination angle of the placement rack 22 in this embodiment can be selected as 10-20 degrees. When the placement rack 22 passes through the flipping assembly 5, the upper end of the placement rack 22 rotates towards the end direction of the conveying unit 2. The film 4 placed in the placement rack 22 should be at a position above the upper abutting surface 61.

[0046] Reference Figure 5 and Figure 6, the flipping assembly 5 includes a base 51 and a vertical rod 52. The base 51 is fixed to the bottom of the box body 1, and the vertical rod 52 is arranged on the base 51. The vertical rod 52 is used to flip the placement rack 22. On the placement rack 22, a push rod 26 is fixedly arranged on the side of the rotating shaft 24 away from the stopper 25. The upper end of the vertical rod 52 is arranged on the movement path of the push rod 26. When the push rod 26 moves along with the placement rack 22, the vertical rod 52 abuts against the push rod 26. Since the positions of the push rod 26 and the rotating shaft 24 are spaced apart, the push rod 26 blocks the movement of the push rod 26 under the action of the vertical rod 52, thereby driving the placement rack 22 to rotate around the rotating shaft 24, and then flipping the film 4 located on the placement rack 22. The lower end of the vertical rod 52 is rotatably connected to the base 51, and a tension spring 53 is arranged on the side of the vertical rod 52 that abuts against the push rod 26. The function of the tension spring 53 is to provide a force for the vertical rod 52 to flip the placement rack 22. After the placement rack 22 is flipped, the push rod 26 will push against the vertical rod 52, causing the vertical rod 52 to rotate against the elastic force of the tension spring 53, and the push rod 26 can cross over the vertical rod 52, and then the vertical rod 52 returns to the vertical state again under the action of the tension spring 53. At the same time, a first positioning block 54 is arranged on the base 51, and a second positioning block 55 is arranged on the lower part of the vertical rod 52. When the vertical rod 52 is in the vertical state, the second positioning block 55 abuts against the first positioning block 54. The elastic force of the tension spring 53 is used to squeeze the second positioning block 55 against the first positioning block 54, and the first positioning block 54 is used to block the second positioning block 55, so that the position of the vertical rod 52 can be kept in the vertical state, and at the same time, the tension spring 53 has enough elastic force to flip the placement rack 22.

[0047] Reference Figure 7 , an installation frame 71 is arranged on the upper part of the air blowing head 3. The installation frame 71 is connected to the box body 1. A guide rod 72 is connected to the air blowing head 3. The guide rod 72 is arranged vertically and is vertically slidably connected to the installation frame 71, and the air blowing head 3 is fixed to the lower end of the guide rod 72, so that the air blowing head 3 can abut against the upward surface of the placement rack 22 under the action of gravity, and when the conveying rack is conveying, the air blowing head 3 can slide vertically under the action of the guide rod 72, so that the air blowing head 3 can adapt to the inclination angle of the placement rack 22, and at the same time, the air blowing head 3 dries along the surface of the film 4. Two air blowing heads 3 are arranged in this embodiment. One air blowing head 3 is arranged in front of the flipping assembly 5 along the conveying direction of the conveying chain 21, and the other air blowing head 3 is arranged behind the flipping assembly 5 along the conveying direction of the conveying chain 21, so that the two air blowing heads 3 dry the two films 4 in front of and behind the flipping assembly 5 respectively.

[0048] Combined with Figure 4, support wheels 27 are arranged on both sides of the hair dryer head 3. The support wheels 27 are rotatably connected to the hair dryer head 3, and the width of the support wheels 27 extends from the placement rack 22 to the guide rail 6, so that the support wheels 27 can abut against the placement rack 22 or the upper abutting surface 61 of the guide rail 6. In this embodiment, a counterweight can be arranged on the hair dryer head 3 behind the flipping assembly 5 along the conveying direction of the conveying chain 21. At the same time, a transmission assembly 8 is arranged between the two hair dryer heads 3. The transmission assembly 8 adjusts the height positions of the two hair dryer heads 3 simultaneously, and one hair dryer head 3 moves upward while the other hair dryer head 3 moves downward. When the drying of a film 4 is completed, the counterweight can move the corresponding hair dryer head 3 downward, and the support wheel 27 abuts against the upper abutting surface 61 of the guide rail 6. At the same time, the other hair dryer head 3 moves upward to reach the highest position and exceed the inclined placement rack 22, so that the hair dryer head 3 located in front of the flipping assembly 5 along the conveying direction of the conveying chain 21 can normally cross over the placement rack 22; then as the conveying chain 21 conveys, the support wheel 27 installed on the hair dryer head 3 with the counterweight will move upward along the placement rack 22, so that the other hair dryer head 3 will move downward along the corresponding placement rack 22.

[0049] The transmission assembly 8 includes a gear 81, a rack 82 and a rotating shaft 83. The rotating shaft 83 is rotatably installed on the mounting frame 71, and the direction of the rotating shaft 83 is parallel to the conveying direction of the conveying unit 2. Gears 81 are coaxially and fixedly arranged at both ends of the rotating shaft 83. The rack 82 is formed on the side wall of the upper end of the guide rod 72. The rack 82 cooperates with the gear 81, and the racks 82 of the two guide rods 72 are respectively on both sides of the axis of the rotating shaft 83. Thus, when the rotating shaft 83 rotates, the racks 82 engaged by the two gears 81 move in opposite directions in the vertical direction to ensure that the two hair dryer heads 3 correctly blow air on the films 4 on the two placement racks 22.

[0050] A driving assembly 9 is connected to the mounting frame 71. The driving assembly 9 includes a driving motor 91 and a driving screw 92. The driving motor 91 is a servo motor or a stepping motor. The driving screw 92 is arranged parallel to the conveying direction of the conveying unit 2. A fixing frame 73 is fixedly arranged in the box body 1. The driving motor 91 is fixed on the fixing frame 73. The mounting frame 71 is horizontally slidably connected to the fixing frame 73, and the sliding direction of the mounting frame 71 is parallel to the driving screw 92. The driving screw 92 is threadedly connected to the mounting frame 71. One end of the driving screw 92 is coaxially and fixedly connected to the output shaft of the driving motor 91. By the forward and reverse rotation of the driving motor 91, the mounting frame 71 can be reciprocally moved along the fixing frame 73. Since the two hair dryer heads 3 are connected to the mounting frame 71 through the guide rods 72, the hair dryer heads 3 can reciprocally move on the two films 4 being dried, so as to prevent damage caused by heating the same position of the film 4 for a long time, and can also achieve a better drying effect through multiple air blows.

[0051] Reference Figure 8 , the hair dryer head 3 includes a housing 31 and an air duct 32 disposed inside the housing 31. The lower part of the housing 31 is open, and the air duct 32 is horizontally arranged so that the air duct 32 is arranged along the width of the film 4. A plurality of air nozzles 33 are uniformly arranged in the length direction of the air duct 32, and the air nozzles 33 blow air downward to reduce the wind force from blowing the film 4 out of the placement rack 22. At the same time, the opening of the housing 31 is vertically oriented towards the film 4, which facilitates the housing 31 to control the hot air, enabling the hair dryer head 3 to accurately send the hot air to the position that needs to be dried, reducing the loss of energy, and the hot air that returns to the air collecting hood 12 in the box body 1 will not be mixed with the hot air delivered to the hair dryer head 3.

[0052] The working process of this embodiment:

[0053] First, before the conveying chain 21 drives the placement rack 22 to enter the box body 1 from the initial end of the conveying unit 2, the film 4 is inserted into the placement rack 22. Grooves for inserting the sides of the film 4 are provided on the inner wall of the U-shaped structure of the placement rack 22. When the placement rack 22 moves to the position of the first hair dryer head 3 along with the conveying chain 21, the hair dryer head 3 will move along the upward surface of the placement rack 22, and during the movement, the hair dryer head 3 dries the film 4. At the same time, the driving assembly 9 can also drive the hair dryer head 3 to move reciprocally, and the position of the reciprocal movement should also gradually move towards the end of the conveying chain 21 as the conveying chain 21 moves, that is, the distance that the mounting rack 71 is driven by the driving assembly 9 to move towards the initial end of the conveying chain 21 each time should subtract the distance that the conveying chain 21 has moved, and the distance moved towards the end of the conveying chain 21 should add the distance that the conveying chain 21 has moved, so as to ensure that the hair dryer head 3 moves reciprocally on the placement rack 22. When the placement rack 22 approaches the flipping assembly 5, the hair dryer head 3 disengages from the placement rack 22, and the flipping assembly 5 flips the placement rack 22 and the film 4 simultaneously. The flipped film 4 reaches the position of another hair dryer head 3 along with the conveying chain 21, so that the hair dryer head 3 dries the other side of the film 4, thereby completing the drying of both sides of the film 4 after passing through the conveying unit 2 once. After the film 4 moves to the end of the conveying unit 2 along with the conveying chain 21, the placement rack 22 automatically rotates downward under the action of gravity, causing the film 4 to move out of the placement rack 22.

[0054] This embodiment also discloses a drying method for a film. Using the above-mentioned drying device for a film, a single film 4 is in an inclined state and moves horizontally along with the conveying unit 2, and the film 4 is dried from the inclined upward surface of the film 4. When one side of the film 4 is dried, the conveying unit 2 drives the film 4 to reach the position of the flipping assembly 5, and the flipping assembly 5 flips the film 4 to the other side so that the other side of the film 4 is inclined upward and is dried.

[0055] Embodiment Two

[0056] This embodiment discloses a drying device for films, as Figure 9 shown. The difference from the first embodiment is that the driving assembly 9 is configured such that a synchronous pulley 93 is connected to the driving motor 91. There are two synchronous pulleys 93, both of which are rotatably connected to the fixing frame 73. A synchronous belt 94 is drivingly connected between the two synchronous pulleys 93, and the upper side or the lower side of the synchronous belt 94 is fixedly connected to the mounting frame 71. The synchronous belt 94 is arranged along the conveying direction of the conveying unit 2. The output shaft of the driving motor 91 is coaxially and fixedly connected to one of the synchronous pulleys 93. Thus, when the driving motor 91 operates, the synchronous pulley 93 can drive the synchronous belt 94, and further drive the mounting frame 71 to reciprocate.

[0057] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0058] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0059] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as a limitation of the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A film drying device, comprising a housing and a conveying unit arranged in the housing, characterized in that: The conveying unit includes a conveying chain and a placing rack evenly arranged along the conveying chain, and the placing rack is installed on the conveying chain. The placing rack is U-shaped as a whole, and a groove for placing the edge of the film is opened on the inner side wall of the U-shape of the placing rack; when the placing rack is used to convey the film, the U-shaped opening of the placing rack is tilted upward; when the placing rack reaches the end of the conveying unit, the U-shaped opening of the placing rack rotates downward; Guide rails fixed on the box body are arranged on both sides of the placement rack, and the guide rails have an upper abutment surface arranged horizontally and parallel to the conveying direction of the conveying chain; the placement rack is rotatably connected to the conveying chain through a rotating shaft and blocks are arranged on both sides of the placement rack; When the placement rack moves along the conveying direction of the conveying unit, the stopper is supported on the upper abutment surface, and the placement rack is in an inclined state due to the restriction of the rotating shaft and the stopper, and the film is tilted upward along with one side of the placement rack; A flip assembly for rotating the placement rack is provided along the conveying direction of the conveying unit, the flip assembly is fixedly arranged in the box, and the placement rack passes through the front and rear of the flip assembly and arranges the two sides of the film tilted upward; the flip assembly includes a base and a vertical rod, the placement rack deviates from the rotation axis and is provided with a push rod on the side of the rotation axis away from the stop block, the lower end of the vertical rod is rotatably connected to the base, when the vertical rod is vertically arranged, the upper end of the vertical rod is located on the moving path of the push rod, a tension spring is provided between the base and the vertical rod, a first positioning block is fixedly provided on the base, and a second positioning block is fixedly provided on the vertical rod, the elastic force of the tension spring is used to drive the second positioning block to abut against the first positioning block and keep the vertical rod in a vertical state, and the torque direction of the push rod on the vertical rod is opposite to the torque direction of the tension spring on the vertical rod; A blow head is provided in the box body, the blow head is connected to a blower, and the blow head is used to dry the upper surface of the film before and after the flip assembly; two blow heads are provided, and they correspond to the two placement racks before and after the flip assembly respectively, and a mounting rack is provided in the box body, and a vertically sliding guide rod is provided on the mounting rack, and the blow head is fixed to the lower end of the guide rod, and the placement rack abuts against the blow head in the process of moving with the conveyor chain, and the blow head moves up and down along the placement rack through the setting of the guide rod; A transmission assembly is arranged on the mounting frame, and the transmission assembly includes a gear, a rack and a rotating shaft. The rotating shaft is rotatably connected to the mounting frame, and two racks are coaxially fixedly arranged on the rotating shaft. The racks are arranged along the length direction of the guide rod, the gear is meshed with the rack, and the two racks are respectively located on both sides of the rotating shaft; A counterweight block is arranged on the air blowing head corresponding to the placement rack inclined toward the initial end of the conveying unit.

2. A film drying device according to claim 1, characterized in that: A fixing frame is arranged in the box body, and the mounting frame is connected to the fixing frame in a horizontal sliding manner along the conveying direction of the conveying unit. A driving assembly for driving the mounting frame to reciprocate is installed on the fixing frame, and the reciprocating position moves along the conveying direction of the conveying unit.

3. A film drying device according to claim 2, characterized in that: The driving assembly includes a driving motor and a driving screw. The driving motor is fixed on a fixing frame. The driving screw is arranged along the moving direction of the mounting frame. The driving screw is coaxially connected to the output shaft of the driving motor and is threadedly connected to the mounting frame.

4. A film drying device according to claim 2, characterized in that: The driving assembly includes a driving motor, a synchronous wheel and a synchronous belt. The driving motor is fixed on a mounting frame. Two synchronous wheels are provided. One synchronous wheel is coaxially fixed on the output shaft of the driving motor, and the other synchronous wheel is rotatably mounted on the fixing frame. The synchronous belt is transmission-connected to the two synchronous wheels, and the transmission direction of the synchronous belt is parallel to the moving direction of the mounting frame. The mounting frame is fixed on the synchronous belt.

5. A film drying method, using the film drying device according to claim 1 to dry a single film, characterized in that: The film is tilted and moves with the conveying unit. The film is turned over during the conveying process. Before and after the turning over, the two sides of the film are tilted upwards respectively. Before and after the turning over of the film, the side tilted upwards is blown and dried.

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