Device and process for double-sided printing of multi-layer composite film with fixed-point overprinting

Abstract

The present invention provides a device and process for double-sided printing and fixed-point overprinting of a multi-layer composite film, including a printing device and a support platform, wherein the support platform is fixedly installed on one side of the support platform, and a drying mechanism is provided on the top of the support platform, which can solidify the ink on the multi-layer composite film. In the present invention, the drying mechanism can heat the air inside the drying box through an electric heating plate after the printing device prints the multi-layer composite film, so that when the multi-layer composite film passes through the drying box, the ink printed on its surface is dried, and at the same time, the conveying mechanism generates wind force to transmit the hot air to the bottom, and the blocking buffer mechanism can prevent the wind force from directly acting on the ink, which will cause the ink to be blown away, and the uniform heating mechanism can make the air on the ink flow, thereby improving the drying effect of the ink, and finally the waste heat recovery mechanism and the secondary air drying mechanism can recycle the hot air, and at the same time, the undried ink is secondary dried.

Description

Technical Field

[0001] The invention relates to the technical field of printing fixed-point overprinting, in particular to a device and process for double-sided printing of a multi-layer composite film with fixed-point overprinting. Background Art

[0002] Overprinting refers to the requirement for overlapping and registering of printed images and texts on each color plate during multi-color printing. That is, the single-color printing plates with different screen angles obtained after the original is separated into colors are overlapped and registered in sequence according to the color sequence of the printing plates, and the final printed product is the same level and color tone as the original. In order to make the surface printed pattern clearer, some multi-layer composite films will be printed by fixed-point overprinting.

[0003] Publication No. "CN211106312U" provides a device for double-sided fixed-point overprinting of a multi-layer composite film, comprising a tube and a plurality of groups of mounting grooves opened along the axial direction of the tube, the mounting grooves being distributed at equal angles along the radial direction of the tube, a clamping tube being inserted inside the mounting groove, the clamping tube having a plurality of groups of clamping grooves opened along the axial position, a clamping hole being opened on the side wall of the clamping groove, a limit spring being installed on the clamping tube away from the end portion of the mounting groove, the other end of the limit spring being installed on the inner wall of the tube, the tube having a plurality of groups of slots opened along the axial direction of the tube, the slots being opened along the tube ring portion and the mounting grooves in equal number and in equal radial directions, the device facilitates replacement of the mold and makes it more convenient to use.

[0004] However, the above device still has the following problems during implementation:

[0005] When performing fixed-point overprinting on a multi-layer composite film, it is necessary to wait for the printing ink to solidify before overprinting the other side of the multi-layer composite film. However, the printing device usually lacks the function of drying the ink printed on the multi-layer composite film, so that the user needs to spend a lot of time waiting for the ink to solidify, thereby reducing work efficiency. Although there is a method in the prior art of drying the ink printed on the multi-layer composite film by blowing hot air with a hot air blower, the hot air directly acts on the ink, and the ink is easily blown away. Although the drying effect is achieved, the printed pattern is also easily scratched, so that the printed multi-layer composite film does not achieve the expected effect, affecting subsequent use. Summary of the invention

[0006] The object of the present invention is to provide a device and process for double-sided printing and fixed-point overprinting of a multi-layer composite film to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A device and process for double-sided printing and fixed-point overprinting of a multi-layer composite film, comprising a printing device and a supporting platform, wherein the supporting platform is fixedly installed on one side of the printing device, and a drying mechanism is arranged on the top of the supporting platform, which can solidify the ink on the multi-layer composite film;

[0009] The drying mechanism comprises a drying box, which is fixedly mounted on a supporting platform, and an electric heating plate is fixedly mounted on the inner wall of the drying box, which can heat the air inside the drying box;

[0010] A conveying mechanism, wherein the conveying mechanism is fixedly arranged on the drying box, and when the electric heating plate heats the surrounding air, the conveying mechanism can transmit the hot air to the multilayer composite film on the supporting platform to dry the ink;

[0011] The blocking buffer mechanism is adjustably arranged in the drying box. When the conveying mechanism transmits hot air through wind force, the blocking buffer mechanism can block the wind force to prevent the wind force from directly blowing away the unsolidified ink on the multi-layer composite film.

[0012] Preferably, the conveying mechanism includes a motor, which is fixedly installed on one side of the drying box, and the output end of the motor is fixedly connected to a transmission rod, one end of the transmission rod passes through the interior of the drying box and is fixedly connected to a first bevel gear, one side of the first bevel gear is meshingly connected to a second bevel gear, the bottom of the second bevel gear is fixedly connected to a rotating rod, the bottom of the rotating rod is fixedly connected to a rotating block, and the surface of the rotating block is fixedly connected to three swing leaves.

[0013] Preferably, the blocking buffer mechanism includes a first transmission wheel, an inner wall of the first transmission wheel is fixedly connected to the surface of a transmission rod, a second transmission wheel is arranged at the bottom of the first transmission wheel, a belt is sleeved on the outer surface of the first transmission wheel, the first transmission wheel and the second transmission wheel are connected through belt transmission, one end of the second transmission wheel passes through the interior of the drying box and is fixedly connected to a transmission disk, one side of the transmission disk is fixedly connected to an extrusion rod, the surface of the extrusion rod is sleeved with an extrusion block, one side of the extrusion block is fixedly connected to a buffer plate, the top of the buffer plate is provided with air holes, the number of the air holes is several, one side of the buffer plate is fixedly connected to a sliding block, and the bottom of the buffer plate is provided with a heat uniforming mechanism, which can uniformly heat the hot air delivered from the air holes and can drive the air to flow at the ink on the multi-layer composite film, thereby improving the ink solidification effect.

[0014] Preferably, the uniform heating mechanism includes a rotating roller, four fan blades are fixedly connected to the outer surface of the rotating roller, one end of the rotating roller is fixedly connected to a pinion, one side of the pinion is meshingly connected to a toothed plate, the top of the toothed plate is fixedly connected to the bottom of the sliding block, one end of the pinion is fixedly connected to a rotating disk, one side of the rotating disk is movably connected to a swing arm via a rotating shaft, and the other end of the swing arm is movably connected to a push plate via a rotating shaft.

[0015] Preferably, a first bearing is sleeved on the surface of the rotating rod, the inner wall of the inner ring of the first bearing is fixedly connected to the surface of the rotating rod, the bottom of the outer ring of the first bearing is fixedly connected to a support frame, and both ends of the support frame are fixedly connected to the inner wall of the drying box.

[0016] Preferably, the buffer plate is V-shaped.

[0017] Preferably, a dovetail slide rail is fixedly connected to one side of the inner wall of the drying box, and a dovetail groove for use with the dovetail slide rail is provided on the top of the sliding block.

[0018] Preferably, a transmission groove is provided on one side of the extrusion block, and the surface of the extrusion rod contacts the inner wall of the transmission groove.

[0019] Preferably, a second bearing is provided on one side of the rotating roller, and one end of the rotating roller is rotatably connected to the inner wall of the drying box through the second bearing.

[0020] Preferably, a process for double-sided printing of a multi-layer composite film with fixed-point overprinting comprises the following steps:

[0021] S1: First, the multi-layer composite film is placed on a printing device for printing. After printing, it is transferred to a supporting platform and dried by a drying mechanism;

[0022] S2: While passing through the drying mechanism, the conveying mechanism will transmit the hot air around the electric heating plate, so that the hot air is gathered at the multi-layer composite film on the supporting platform to quickly dry the ink;

[0023] S3: At the same time, when the conveying mechanism transmits the hot air through wind power, the blocking buffer mechanism can block the wind power to prevent the wind power from directly blowing away the unsolidified ink on the multi-layer composite film;

[0024] S4: After the ink on the multi-layer composite film is dried, the other side thereof can be printed again by the printing device, thereby completing the double-sided fixed-point overprinting of the multi-layer composite film.

[0025] Preferably, a waste heat recovery mechanism is provided on one side of the drying box, which can recycle the hot air inside the drying box for reuse. The waste heat recovery mechanism includes a recovery box, one side of the recovery box is fixedly connected to the drying box, one side of the recovery box is provided with an embedding groove, an activated carbon plate is inserted into the inside of the embedding groove, and the top of the recovery box is fixedly connected to a delivery pipe, one end of the delivery pipe is fixedly connected to the inner wall of the drying box.

[0026] Preferably, a secondary air-drying mechanism is provided at the bottom of the recovery box, which can perform secondary air-drying on the ink dried on the multi-layer composite film so that the ink is completely solidified, and the secondary air-drying mechanism includes an air-drying box, an image sensor is fixedly installed on the top of the inner wall of the air-drying box, a blowing pipe is provided inside the air-drying box, one end of the blowing pipe passes through the interior of the recovery box and is fixedly connected to an air collecting box through a solenoid valve, one side of the air collecting box is fixedly connected to one side of the recovery box, both sides of the air collecting box are fixedly connected to an exhaust pipe through a one-way valve, one end of the exhaust pipe is fixedly connected to one side of the delivery pipe, one side of the air collecting box is fixedly connected to an air collecting cylinder, the top of the air collecting cylinder is fixedly connected to an air inlet pipe through a one-way valve, a piston is provided inside the air collecting cylinder, one side of the piston is fixedly connected to a pushing block, one side of the pushing block is fixedly connected to a pushing rod, and one end of the pushing rod is fixedly connected to one side of the pushing plate.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention provides a drying mechanism, which can heat the air inside the drying box through an electric heating plate after the printing device prints the multi-layer composite film, so that the ink printed on the surface of the multi-layer composite film is dried when the multi-layer composite film passes through the drying box, thereby solving the problem that the printing device usually lacks the function of drying the ink printed on the multi-layer composite film, so that the user needs to spend a lot of time waiting for the ink to solidify, thereby reducing work efficiency.

[0029] 2. The present invention provides a conveying mechanism, so that when the electric heating plate heats the air in the drying box, the conveying mechanism generates wind force to transmit the hot air to the bottom, thereby drying the ink on the multi-layer composite film.

[0030] 3. The present invention sets a blocking buffer mechanism, which can cooperate with the blocking buffer mechanism while the transmission rod in the conveying mechanism rotates, so that the hot air will be blocked by the buffer plate during transmission and slowly fall through the air holes. Then, the buffer plate moves up and down to transmit the hot air to the ink, thereby preventing the wind from directly acting on the ink and causing the ink to be blown away.

[0031] 4. The present invention sets up a heat-uniform mechanism, which can cooperate with the heat-uniform mechanism during the reciprocating up and down movement of the sliding block of the blocking buffer mechanism, so that the hot air is evenly distributed. At the same time, the rotating roller drives the swing arm to cooperate with the rotating shaft, which will also cause the push plate to move back and forth horizontally, thereby allowing the air above the ink to flow, thereby improving the drying effect of the ink.

[0032] 5. The present invention sets up a waste heat recovery mechanism, which can push hot air with water vapor into the recovery box, and the activated carbon plate absorbs the water vapor. The remaining hot air will be recovered into the drying box again through the conveying pipe, thereby achieving the effect of heat energy recovery and utilization.

[0033] 6. The present invention sets a secondary air-drying mechanism. When the image sensor detects that the ink on the multi-layer composite film is dry, the solenoid valve is started and the gas is exhaled from the blowpipe. Since the ink has been preliminarily dried at this time, the wind force directly acts on its surface and will not disperse. The wind force can then be used to dry the ink for a second time to make it completely solidified.

[0034] The drying mechanism in the present invention can heat the air inside the drying box through the electric heating plate after the printing device prints the multi-layer composite film, so that the ink printed on the surface of the multi-layer composite film is dried when the multi-layer composite film passes through the drying box. At the same time, the conveying mechanism generates wind to transmit the hot air to the bottom, and the blocking buffer mechanism can prevent the wind from directly acting on the ink, which will cause the ink to be blown away. The uniform heating mechanism can make the air above the ink flow, thereby improving the drying effect of the ink. Finally, the waste heat recovery mechanism and the secondary air drying mechanism can recycle the hot air and perform secondary drying on the undried ink. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0036] Figure 2 An exploded perspective view of the present invention;

[0037] Figure 3 It is a three-dimensional cross-sectional view of the present invention;

[0038] Figure 4 For the present invention Figure 3 A partial enlarged view of the middle A;

[0039] Figure 5 It is a three-dimensional diagram of the local structure of the present invention;

[0040] Figure 6 A three-dimensional diagram showing a partial structure of the present invention;

[0041] Figure 7 It is a three-dimensional diagram of the local structure of the present invention;

[0042] Figure 8 A perspective view of a local structure of the present invention from the side;

[0043] Fig. 9 It is an exploded view of the local structure of the present invention;

[0044] Fig.10 It is a three-dimensional diagram of the local structure of the present invention.

[0045] In the figure: 1, printing device; 2, supporting platform; 3, motor; 4, transmission rod; 5, first bevel gear; 6, second bevel gear; 7, rotating rod; 8, rotating block; 9, swing leaf; 10, first transmission wheel; 11, second transmission wheel; 12, belt; 13, transmission disk; 14, extrusion rod; 15, extrusion block; 16, buffer plate; 17, air vent; 18, sliding block; 19, rotating roller; 20, fan blade; 21, pinion; 22, tooth plate; 23, rotating disk; 24, swing arm; 25. Push plate; 26. First bearing; 27. Support frame; 28. Dovetail slide rail; 29. ​​Dovetail groove; 30. Transmission groove; 31. Second bearing; 32. Recovery box; 33. Embedded groove; 34. Activated carbon plate; 35. Delivery pipe; 36. Air drying box; 37. Image sensor; 38. Blowing pipe; 39. Air collecting box; 40. Exhaust pipe; 41. Air collecting cylinder; 42. Piston; 43. Push block; 44. Push rod; 45. Inlet pipe; 46. Drying box; 47. Electric heating plate. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] See also Figure 1-10 , the present invention provides a technical solution: Example

[0048] A device and process for double-sided printing and fixed-point overprinting of a multi-layer composite film, comprising a printing device 1 and a supporting platform 2, wherein the supporting platform 2 is fixedly installed on one side of the printing device 1, and a drying mechanism is arranged on the top of the supporting platform 2, which can solidify the ink on the multi-layer composite film;

[0049] One implementation of this embodiment is: the drying mechanism includes a drying box 46, the drying box 46 is fixedly installed on the supporting platform 2, and the inner wall of the drying box 46 is fixedly installed with an electric heating plate 47, which can heat the air inside the drying box 46. By setting the drying mechanism, after the printing device 1 prints the multi-layer composite film, the air inside the drying box 46 can be heated by the electric heating plate 47, so that when the multi-layer composite film passes through the drying box 46, the ink printed on the surface of the multi-layer composite film is dried;

[0050] The conveying mechanism is fixedly arranged on the drying box 46. When the electric heating plate 47 heats the surrounding air, the conveying mechanism can transmit the hot air to the multi-layer composite film on the supporting platform 2 to dry the ink;

[0051] The blocking buffer mechanism is adjustably arranged in the drying box 46. When the conveying mechanism transmits hot air by wind, the blocking buffer mechanism can block the wind to prevent the wind from directly blowing away the unsolidified ink on the multi-layer composite film. Example

[0052] On the basis of the first embodiment, the drying mechanism in this embodiment can dry the unsolidified ink on the multi-layer composite film, but the air heated by the electric heating plate 47 is located at the top, and the multi-layer composite film passes through the bottom of the drying box 46, and the hot air cannot efficiently dry the ink. The conveying mechanism in the present invention includes a motor 3, which is fixedly installed on one side of the drying box 46. The output end of the motor 3 is fixedly connected to a transmission rod 4, one end of the transmission rod 4 passes through the interior of the drying box 46, and is fixedly connected to a first bevel gear 5, and one side of the first bevel gear 5 is meshingly connected to a second bevel gear 5. Gear 6, the bottom of the second bevel gear 6 is fixedly connected with a rotating rod 7, the bottom of the rotating rod 7 is fixedly connected with a rotating block 8, and the surface of the rotating block 8 is fixedly connected with three swinging leaves 9. By setting a conveying mechanism, when the electric heating plate 47 heats the air in the drying box 46, the motor 3 is started to drive the transmission rod 4 and the first bevel gear 5 to rotate. Since the first bevel gear 5 and the second bevel gear 6 are meshed, the rotating rod 7, the rotating block 8 and the swinging leaf 9 will be driven to rotate, thereby generating wind force to transmit hot air to the bottom, and then drying the ink on the multi-layer composite film.

[0053] A first bearing 26 is sleeved on the surface of the rotating rod 7, the inner wall of the inner ring of the first bearing 26 is fixedly connected to the surface of the rotating rod 7, the bottom of the outer ring of the first bearing 26 is fixedly connected to a support frame 27, both ends of the support frame 27 are fixedly connected to the inner wall of the drying box 46, and by providing the first bearing 26 and the support frame 27, the position of the rotating rod 7 can be limited so that it can only rotate around the first bearing 26, thereby driving the rotating block 8 and the swing leaf 9 to rotate more stably. Example

[0054] On the basis of the second embodiment, although the conveying mechanism in this embodiment can convey hot air to the ink by wind force to dry it, if the wind force acts directly on the ink, the ink will be blown away. The blocking buffer mechanism in the present invention includes a first transmission wheel 10, the inner wall of the first transmission wheel 10 is fixedly connected to the surface of the transmission rod 4, the bottom of the first transmission wheel 10 is provided with a second transmission wheel 11, the outer surface of the first transmission wheel 10 is sleeved with a belt 12, the first transmission wheel 10 and the second transmission wheel 11 are connected by the belt 12, one end of the second transmission wheel 11 passes through the interior of the drying box 46, and is fixedly connected with a transmission disk 13, one side of the transmission disk 13 is fixedly connected with an extrusion rod 14, the surface of the extrusion rod 14 is sleeved with an extrusion block 15, one side of the extrusion block 15 is fixedly connected with a buffer plate 16, the top of the buffer plate 16 is provided with an air vent 17, the number of the air vent 17 is a plurality, and one side of the buffer plate 16 is fixedly connected with The bottom of the sliding block 18 and the buffer plate 16 is provided with a heat-uniform mechanism, which can uniformly heat the hot air delivered from the air hole 17 and drive the air to flow at the ink on the multi-layer composite film, thereby improving the effect of ink solidification. By setting a blocking buffer mechanism, the first transmission wheel 10 can be driven to rotate while the transmission rod 4 rotates. The first rotating wheel rotates the second transmission wheel 11, the transmission disk 13 and the extrusion rod 14 through the belt 12. During the rotation of the extrusion rod 14, the surface squeezes the inner wall of the transmission groove 30, so that the extrusion block 15, the buffer plate 16 and the sliding block 18 reciprocate up and down along the trajectory of the dovetail slide rail 28, so that the hot air will be blocked by the buffer plate 16 during the transmission process, slowly fall through the air hole 17, and then the hot air is transmitted to the ink through the up and down movement of the buffer plate 16, so that the wind force can be avoided from directly acting on the ink, which will cause the ink to be blown away.

[0055] The buffer plate 16 is V-shaped. By setting the buffer plate 16 , after the hot air is transmitted to the buffer plate 16 , the wind force will be transmitted to both sides due to the V-shape of the buffer plate 16 and will not directly act on the ink.

[0056] A dovetail rail 28 is fixedly connected to one side of the inner wall of the drying box 46, and a dovetail groove 29 is provided on the top of the sliding block 18 for use with the dovetail rail 28. By setting the dovetail rail 28 and the dovetail groove 29, the moving trajectory of the sliding block 18 and the buffer plate 16 can be limited so that they can only move back and forth up and down along the dovetail rail 28.

[0057] A transmission groove 30 is provided on one side of the extrusion block 15, and the surface of the extrusion rod 14 contacts the inner wall of the transmission groove 30. By setting the transmission groove 30, the surface of the extrusion rod 14 can squeeze the inner wall of the transmission groove 30 during the rotation of the extrusion rod 14, so that the extrusion block 15 and the buffer plate 16 can move back and forth. Example

[0058] On the basis of the third embodiment, although the blocking buffer mechanism in this embodiment can prevent the wind from acting directly on the ink, the hot air is transmitted to both sides, which will cause uneven hot air at the bottom, affecting the ink drying effect. The uniform heating mechanism in the present invention includes a rotating roller 19, and the outer surface of the rotating roller 19 is fixedly connected with four fan blades 20, one end of the rotating roller 19 is fixedly connected with a pinion 21, one side of the pinion 21 is meshingly connected with a tooth plate 22, the top of the tooth plate 22 is fixedly connected to the bottom of the sliding block 18, and one end of the pinion 21 is fixedly connected with a rotating disk 23. One side of the disk 23 is movably connected to a swing arm 24 via a rotating shaft, and the other end of the swing arm 24 is movably connected to a push plate 25 via a rotating shaft. By setting up a heat uniforming mechanism, the tooth plate 22 can be driven to cooperate with the pinion 21 during the reciprocating up and down movement of the sliding block 18, so that the pinion 21, the rotating roller 19 and the fan blade 20 rotate, so that the hot air is evenly distributed. At the same time, the rotating roller 19 drives the swing arm 24 to cooperate with the rotating shaft, and also causes the push plate 25 to reciprocate horizontally, so that the air on the ink flows, thereby improving the drying effect of the ink.

[0059] A second bearing 31 is provided on one side of the rotating roller 19, and one end of the rotating roller 19 is rotatably connected to the inner wall of the drying box 46 through the second bearing 31. By providing the second bearing 31, the position of the rotating roller 19 can be limited so that it can be supported to rotate around the second bearing 31 when rotating. Example

[0060] On the basis of the fourth embodiment, the heat uniformity mechanism in this embodiment can make the hot air distribution more uniform, and at the same time accelerate the air flow to improve the drying effect, but the direct discharge of hot air will cause waste. In the present invention, a waste heat recovery mechanism is provided on one side of the drying box 46, which can recycle the hot air inside the drying box 46 for reuse. The waste heat recovery mechanism includes a recovery box 32, one side of the recovery box 32 is fixedly connected to the drying box 46, one side of the recovery box 32 is provided with an embedding groove 33, and an activated carbon plate 34 is inserted into the embedded groove 33. The top of the recovery box 32 is fixedly connected with a conveying pipe 35, and one end of the conveying pipe 35 is fixedly connected to the inner wall of the drying box 46. By setting up the waste heat recovery mechanism, the hot air with water vapor can be pushed into the recovery box 32 when the push plate 25 moves back and forth, and then the water vapor is absorbed by the activated carbon plate 34, and the remaining hot air will be recycled to the inside of the drying box 46 through the conveying pipe 35, so as to achieve the effect of heat energy recovery and utilization. Example

[0061] On the basis of the first embodiment, the drying mechanism in this embodiment can dry the unsolidified ink on the multi-layer composite film. However, if the ink is excessive during printing and cannot be completely dried by the drying mechanism, it still affects the subsequent use. In the present invention, a secondary air-drying mechanism is provided at the bottom of the recovery box 32, which can perform secondary air-drying on the ink dried on the multi-layer composite film so that the ink is completely solidified. The secondary air-drying mechanism includes an air-drying box 36, and an image sensor 37 is fixedly installed on the top of the inner wall of the air-drying box 36. The interior of the air-drying box 36 is provided with a blowing The air duct 38 has one end that penetrates into the interior of the recovery box 32 and is fixedly connected to an air collecting box 39 through a solenoid valve. One side of the air collecting box 39 is fixedly connected to one side of the recovery box 32. Both sides of the air collecting box 39 are fixedly connected to an exhaust pipe 40 through a one-way valve. One end of the exhaust pipe 40 is fixedly connected to one side of the delivery pipe 35. One side of the air collecting box 39 is fixedly connected to an air collecting cylinder 41. The top of the air collecting cylinder 41 is fixedly connected to an air intake pipe 45 through a one-way valve. A piston 42 is provided inside the air collecting cylinder 41. One side of the piston 42 is fixedly connected to the intake pipe 45. There is a push block 43, one side of the push block 43 is fixedly connected to a push rod 44, one end of the push rod 44 is fixedly connected to one side of the push plate 25, and by setting a secondary air drying mechanism, the push rod 44, the push block 43 and the piston 42 can be driven to move during the reciprocating horizontal movement of the push plate 25, so that air enters the air collecting cylinder 41 from the air inlet pipe 45, and is transmitted to the inside of the air collecting box 39. When the image sensor 37 detects that the ink on the multi-layer composite film is dry, the solenoid valve is started, and the gas is exhaled from the blow pipe 38. Since the ink is at this time Preliminary drying has been carried out, and the ink will not disperse even if wind acts directly on its surface, so the wind can be used to dry the ink for a second time to make it completely solidified. If the gas inside the air collecting box 39 reaches a certain value, the one-way valve at the exhaust pipe 40 will not withstand sufficient pressure, and the gas will be discharged from the exhaust pipe 40 to the inside of the conveying pipe 35, thereby increasing the speed at which hot air enters. At the same time, the hot air temperature inside the recovery box 32 is lower than that inside the drying box 46. Indirect exhaust through the exhaust pipe 40 can also avoid excessive one-time air intake leading to insufficient temperature inside the drying box 46.

[0062] A process for double-sided printing and fixed-point overprinting of a multi-layer composite film comprises the following steps:

[0063] S1: First, the multilayer composite film is placed on the printing device 1 for printing. After printing, it is transferred to the supporting platform 2 and dried by the drying mechanism;

[0064] S2: While passing through the drying mechanism, the conveying mechanism will transmit the hot air around the electric heating plate 47, so that the hot air is gathered at the multi-layer composite film on the supporting platform 2, and the ink is quickly dried;

[0065] S3: At the same time, when the conveying mechanism transmits the hot air through wind power, the blocking buffer mechanism can block the wind power to prevent the wind power from directly blowing away the unsolidified ink on the multi-layer composite film;

[0066] S4: After the ink on the multi-layer composite film is dried, the other side of the multi-layer composite film can be printed again by the printing device 1, thereby completing the double-sided fixed-point overprinting of the multi-layer composite film.

[0067] Working principle: After the printing device 1 prints the multi-layer composite film, the air inside the drying box 46 is heated by the electric heating plate 47, so that when the multi-layer composite film passes through the drying box 46, the conveying mechanism can heat the air in the drying box 46 by the electric heating plate 47. The motor 3 starts to drive the transmission rod 4 and the first bevel gear 5 to rotate. Since the first bevel gear 5 and the second bevel gear 6 are meshed, the rotating rod 7, the rotating block 8 and the swing blade 9 are driven to rotate, thereby generating wind force to transmit the hot air to the bottom. When the transmission rod 4 rotates, it drives the first transmission wheel 10 to rotate. The first rotating wheel passes The belt 12 causes the second transmission wheel 11, the transmission disc 13 and the extrusion rod 14 to rotate. During the rotation of the extrusion rod 14, the surface extrudes the inner wall of the transmission groove 30, so that the extrusion block 15, the buffer plate 16 and the sliding block 18 reciprocate up and down along the track of the dovetail slide rail 28, so that the hot air is blocked by the buffer plate 16 during the transmission process, and slowly falls through the air vent 17, and then the buffer plate 16 moves up and down to transmit the hot air to the ink. During the reciprocating movement of the sliding block 18, the tooth plate 22 is driven to cooperate with the pinion 21, so that the pinion 21, the rotating roller 19 and The fan blades 20 rotate to evenly distribute the hot air. At the same time, the rotating roller 19 drives the swing arm 24 to cooperate with the rotating shaft, and also causes the push plate 25 to reciprocate horizontally, so that the air on the ink flows, improving the drying effect of the ink. At the same time, when the push plate 25 reciprocates, the hot air with water vapor is pushed into the recovery box 32, and then the activated carbon plate 34 absorbs the water vapor. The remaining hot air will be recycled into the drying box 46 through the conveying pipe 35, so as to achieve the effect of heat energy recovery. When the image sensor 37 detects that the ink on the multi-layer composite film is dry, it starts The solenoid valve is actuated, and the gas is exhaled from the blow pipe 38. Since the ink has been preliminarily dried at this time, the wind will not disperse it directly on its surface, so the wind can be used to dry the ink for a second time to make it completely solidified. If the gas inside the gas collecting box 39 reaches a certain value, the one-way valve at the exhaust pipe 40 will not withstand the insufficient pressure, and the gas will also be discharged from the exhaust pipe 40 to the inside of the conveying pipe 35, thereby increasing the speed at which hot air enters. At the same time, the temperature of the hot air inside the recovery box 32 is lower than that inside the drying box 46. Indirect exhaust through the exhaust pipe 40 can also avoid excessive one-time air intake leading to insufficient temperature inside the drying box 46.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for double-sided printing and fixed-point overprinting of a multi-layer composite film, comprising a printing device (1) and a support platform (2), wherein the support platform (2) is fixedly mounted on one side of the printing device (1), and characterized in that: A drying mechanism is provided on the top of the support platform (2) to solidify the ink on the multi-layer composite film; The drying mechanism comprises a drying box (46), wherein the drying box (46) is fixedly mounted on the supporting platform (2), and an electric heating plate (47) is fixedly mounted on the inner wall of the drying box (46) so as to heat the air inside the drying box (46); A conveying mechanism, the conveying mechanism being fixedly mounted on the drying box (46), and when the electric heating plate (47) heats the air around it, the conveying mechanism can transmit the hot air to the multilayer composite film on the supporting platform (2) to dry the ink; a blocking buffer mechanism, the blocking buffer mechanism being adjustably arranged in the drying box (46); when the conveying mechanism transmits hot air by wind force, the blocking buffer mechanism can block the wind force, thereby preventing the wind force from directly blowing away the unsolidified ink on the multi-layer composite film; The conveying mechanism comprises a motor (3), the motor (3) being fixedly mounted on one side of a drying box (46), the output end of the motor (3) being fixedly connected to a transmission rod (4), one end of the transmission rod (4) passing through the interior of the drying box (46) and being fixedly connected to a first bevel gear (5), one side of the first bevel gear (5) being meshingly connected to a second bevel gear (6), the bottom of the second bevel gear (6) being fixedly connected to a rotating rod (7), the bottom of the rotating rod (7) being fixedly connected to a rotating block (8), and the surface of the rotating block (8) being fixedly connected to three swinging leaves (9); The blocking buffer mechanism comprises a first transmission wheel (10), the inner wall of the first transmission wheel (10) is fixedly connected to the surface of the transmission rod (4), a second transmission wheel (11) is arranged at the bottom of the first transmission wheel (10), a belt (12) is sleeved on the outer surface of the first transmission wheel (10), the first transmission wheel (10) and the second transmission wheel (11) are connected by the belt (12), one end of the second transmission wheel (11) passes through the interior of the drying box (46) and is fixedly connected to a transmission disc (13), one side of the transmission disc (13) is fixedly connected to an extrusion A pressure rod (14), wherein the surface of the pressure rod (14) is sleeved with an extrusion block (15), one side of the pressure block (15) is fixedly connected to a buffer plate (16), the top of the buffer plate (16) is provided with an air hole (17), the number of the air holes (17) is a plurality, one side of the buffer plate (16) is fixedly connected to a sliding block (18), and the bottom of the buffer plate (16) is provided with a uniform heating mechanism, which can uniformly heat the hot air delivered from the air hole (17) and can drive the air to flow at the ink on the multi-layer composite film, thereby improving the ink solidification effect; The uniform heating mechanism comprises a rotating roller (19), the outer surface of which is fixedly connected to four fan blades (20), one end of the rotating roller (19) is fixedly connected to a pinion gear (21), one side of the pinion gear (21) is meshingly connected to a toothed plate (22), the top of the toothed plate (22) is fixedly connected to the bottom of the sliding block (18), one end of the pinion gear (21) is fixedly connected to a rotating disk (23), one side of the rotating disk (23) is movably connected to a swing arm (24) via a rotating shaft, and the other end of the swing arm (24) is movably connected to a push plate (25) via a rotating shaft.

2. The device for double-sided printing and fixed-point overprinting of a multi-layer composite film according to claim 1, characterized in that: A first bearing (26) is sleeved on the surface of the rotating rod (7); the inner wall of the inner ring of the first bearing (26) is fixedly connected to the surface of the rotating rod (7); the bottom of the outer ring of the first bearing (26) is fixedly connected to a support frame (27); both ends of the support frame (27) are fixedly connected to the inner wall of the drying box (46).

3. The device for double-sided printing and fixed-point overprinting of a multi-layer composite film according to claim 1, characterized in that: The buffer plate (16) is in a V-shape.

4. The device for double-sided printing and fixed-point overprinting of a multi-layer composite film according to claim 1, characterized in that: A dovetail slide rail (28) is fixedly connected to one side of the inner wall of the drying box (46), and a dovetail groove (29) for use with the dovetail slide rail (28) is provided on the top of the sliding block (18).

5. The device for double-sided printing and fixed-point overprinting of a multi-layer composite film according to claim 1, characterized in that: A transmission groove (30) is provided on one side of the extrusion block (15), and a surface of the extrusion rod (14) contacts an inner wall of the transmission groove (30).

6. The device for double-sided printing and fixed-point overprinting of a multi-layer composite film according to claim 2, characterized in that: A second bearing (31) is provided on one side of the rotating roller (19), and one end of the rotating roller (19) is rotatably connected to the inner wall of the drying box (46) via the second bearing (31).

7. A process for double-sided printing and fixed-point overprinting of a multi-layer composite film, according to a device for double-sided printing and fixed-point overprinting of a multi-layer composite film according to any one of claims 1 to 6, characterized in that: The following steps are included: S1: First, the multilayer composite film is placed on a printing device (1) for printing. After printing, the multilayer composite film is transferred to a support platform (2) and dried by a drying mechanism; S2: while passing through the drying mechanism, the conveying mechanism will transmit the hot air around the electric heating plate (47), so that the hot air is gathered at the multi-layer composite film on the supporting platform (2), thereby quickly drying the ink; S3: At the same time, when the conveying mechanism transmits the hot air through wind power, the blocking buffer mechanism can block the wind power to prevent the wind power from directly blowing away the unsolidified ink on the multi-layer composite film; S4: After the ink on the multi-layer composite film is dried, the other side of the multi-layer composite film can be printed again by the printing device (1), thereby completing the double-sided fixed-point overprinting of the multi-layer composite film.

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