Film printing and drying device
By setting up interlaced hot air ducts and cold air ducts in the film printing and drying device, the problem of film deformation at high temperature is solved, and an efficient and stable drying process is achieved to ensure the quality of printed materials.
Patent Information
- Application Number
- CN202422200727.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-09
AI Technical Summary
In existing film printing and drying equipment, the perpendicular or oblique blowing of the air flow causes high pressure on the film surface, which is prone to deformation when exposed to high temperatures for a long time, affecting the quality and stability of the printed materials.
A film printing and drying device is designed, which adopts a staggered arrangement of hot air ducts and cold air ducts. The hot air ducts blow to the side printed with ink, and the cold air ducts blow to the side without ink. The air flow direction is perpendicular to the direction of the film transport, and further cool down with the end cold air chamber to avoid the film stretching and deformation.
Effectively protect the film from deformation, improve drying efficiency, ensure the quality and stability of the printed materials, prevent ink from adhering to the conveying roller, and maintain printing clarity.
Smart Images
Figure CN223045382U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of drying, in particular to a drying device for thin-film printing. Background Art
[0002] A thin-film printing machine is a printing device specifically used for printing thin-film materials. It uses a fluid ink with strong fluidity, and transfers the ink to the graphic part of the printing plate through an ink fountain rubber roller and an anilox roller, and makes it inked. Subsequently, through a pressure roller applying printing pressure, the ink on the printing plate is transferred to the thin-film material, and finally the printing process is completed after drying. This printing machine is suitable for printing thin films, such as plastic thin films, etc., and is widely used in multiple fields such as packaging, advertising, and labels. The use of a thin-film printing machine not only improves the printing efficiency, but also enhances the quality and aesthetics of printed products, meeting the market's demand for personalized and high-quality printed products. When drying the printed thin film, if only hot air is used, although the ink can be quickly dried in a high-temperature environment, its disadvantages are also obvious. When the temperature is too high, the tensile strength of the plastic is low and the elongation rate is large, which means that the plastic will become more easily stretched, and the text or pattern on the thin film with printed text or pattern will be deformed if it is stretched. Content of the Utility Model
[0003] The technical problem to be solved by the utility model lies in the existing thin-film printing drying equipment. During the drying process, the air flow generally blows vertically or obliquely towards the surface of the thin film, and the air flow will generate a relatively large pressure on the surface of the thin film, like this for a long time. Aiming at the above defects of the prior art, a drying device for thin-film printing is provided.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0005] Construct a drying device for thin-film printing, including a frame main body. The frame main body is a hollow box shape. A thin-film inlet and a thin-film outlet are opened on the left side wall of the frame main body. Inside the frame main body, near the bottom position, an ink cartridge, a printing roller, and a pressure roller are sequentially arranged from bottom to top. Inside the frame main body, several first guide rollers are arranged above the pressure roller. Inside the frame main body, a hot air duct and a cold air duct are provided. The hot air duct blows the hot air flow towards the side of the thin film with printed ink, and the cold air duct blows the cold air flow towards the side of the thin film without ink. One side of the thin film is in the cold air flow and the other side is in the hot air flow, avoiding the thin film from being deformed due to being in the hot air flow for a long time.
[0006] Preferably, both the hot air flow and the cold air flow enter from one side of the frame main body and discharge from the other side, so that the flowing directions of the hot air flow and the cold air flow are perpendicular to the conveying direction of the thin film.
[0007] Preferably, a cold air flow inlet and a hot air flow inlet are provided on the front side wall of the frame body, and a cold air flow outlet and a hot air flow outlet are provided on the rear side wall of the frame body. The cold air flow inlet is communicated with the front end of the cold air duct, the cold air flow outlet is communicated with the rear end of the cold air duct, the hot air flow inlet is communicated with the front end of the hot air duct, and the hot air flow outlet is communicated with the end of the hot air duct.
[0008] Preferably, the number of the first guide rollers is an even number, and the first guide rollers are symmetrically arranged inside the frame body. During use, the unprinted side of the film printed by the printing roller directly contacts the first guide rollers, so that the film is conveyed circuitously inside the frame body through the first guide rollers.
[0009] Preferably, a second guide roller is arranged obliquely below one of the first guide rollers at the end of the film circuitous path. The cold air duct and the film after being processed by the cold air duct are redirected by the second guide roller and conveyed to the film discharge port.
[0010] Preferably, the device further includes a cold air cavity arranged at the end of the film conveying path. The cold air cavity is used for the cold air flow to pass through. The cold air flow can further cool the film after the drying treatment to avoid large elastic deformation of the film due to pulling during the process of collecting the film into a roll.
[0011] Preferably, the cold air flow of the cold air cavity enters the cold air cavity from the through hole on the front side wall of the frame body and discharges from the through hole on the rear side wall of the frame body. The cold air flow in the cold air cavity flows along a direction parallel to the film surface and perpendicular to the film conveying direction.
[0012] Preferably, the printing roller is located above the ink liquid level in the ink cartridge and the printing roller does not contact the ink. A sponge is arranged in the ink cartridge, and the sponge is used for smearing the ink in the ink cartridge on the rotating printing roller.
[0013] Preferably, the lower end of the sponge is fixedly connected to the bottom of the ink cartridge, the upper end of the sponge contacts the lower end of the printing roller, and the sponge is in a compressed state.
[0014] Preferably, the printing roller is driven by a motor A arranged on the front side wall or the rear side wall of the frame. One or more of the first guide rollers or the second guide rollers are driven by a motor B arranged on the front side wall or the rear side wall of the frame. The first guide roller or the second guide roller driven by the motor B can provide power for the film during the transmission process, avoiding the film being subjected to too much tension due to only being pulled by the end collecting roller during the conveying process.
[0015] Of course, the speed of forming the printing surface during the rotation of the printing roller is the same as the film conveying speed, that is, during the rotation of the printing roller, the circumferential rotation speed of the outer circumference of the printing roller is the same as the conveying speed of the film, so as to ensure the accuracy of printing.
[0016] The beneficial effects of the present utility model are as follows:
[0017] 1. By arranging a hot air duct on the side where the ink is printed on the film and a cold air duct on the other side, with a flowing hot air current in the hot air duct and a flowing cold air current in the cold air duct, the temperature on the side of the film near the hot air duct is relatively high and its stretch rate is relatively large, while the temperature on the side of the film near the cold air duct is relatively low and its stretch rate is relatively low. The different stretch rates of the two sides of the fixed ears together make the overall stretch rate of the film smaller than that in a completely hot air environment, thereby avoiding the film being stretched and deformed during transportation.
[0018] 2. By further cooling the film through the cold air chamber arranged at the end of the film transportation path, the stretch rates of both sides of the film are in a relatively low state, which can avoid the film being stretched and deformed during the process of being collected into a roll at the end, and can further cool the dried ink layer, avoiding ink deterioration and also avoiding ink adhesion on the conveying rollers.
[0019] 3. The printing roller of the present utility model is not in direct contact with the ink in the ink cartridge, but is conveyed through a sponge. This can ensure that the surface of the printing roller can evenly apply the ink while avoiding the printing roller being affected by excessive ink adhesion and thus affecting the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will further explain the present utility model in conjunction with the drawings and embodiments. The drawings in the following description are only partial embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings:
[0021] Figure 1 is a perspective view of the present utility model.
[0022] Figure 2 is a cross-section of the present utility model Figure 1 .
[0023] Figure 3 is a cross-section of the present utility model Figure 2 .
[0024] Figure 4 is a sectional view of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be combined with the technical solution in the embodiments of the utility model for a clear and complete description. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.
[0026] For ease of understanding, the following definitions are made: Figure 1 As shown, the X-axis direction is the front, the Z-axis direction is the top, the Y-axis direction is the right, and other view directions are defined based on this view direction.
[0027] like Figures 1-4 As shown, a film printing and drying device includes a frame body 100, the frame body 100 is in the shape of a hollow box, a film feed port 101 and a film discharge port 102 are opened on the left side wall of the frame body 100, and the film feed port 101 is located below the film discharge port 102, and an ink cartridge 200, a printing roller 300 and a pressing roller 400 are arranged in sequence from bottom to top near the bottom of the frame body 100, and a printing roller 300 and a pressing roller 400 are located on the upper side of the pressing roller 400 in the frame body 100. A plurality of first guide rollers 500 are provided. The film printed by the printing roller 300 moves in a circuitous manner inside the frame body 100 under the action of the plurality of first guide rollers 500. A second guide roller 600 is provided obliquely below a first guide roller at the end of the film's circuitous path. A hot air duct 10 and a cold air duct 20 are provided inside the frame body 100. The film processed by the hot air duct 10 and the cold air duct 20 is redirected and transported to the film discharge port 102 by the second guide roller 600.
[0028] It should be noted that the printing roller 300 , the pressing roller 400 , the first guide roller 500 , the second guide roller 600 , and the ink cartridge 200 are connected to the front side wall and the rear side wall of the frame body 100 .
[0029] Of course, in order to facilitate maintenance, the side walls of the hollow box-shaped frame body 100 can be connected in a detachable manner, for example, the side walls are connected by bolts or the side walls are connected in a door-like manner, which increases the convenience of operating the device.
[0030] The first guide roller 500 is arranged inside the frame body 100 in a symmetrical state with respect to the surface where the printing roller 300 and the pressure roller 400 are located. The first guide rollers 500 are arranged in pairs. When in use, the unprinted side of the film 1 printed by the printing roller 300 directly contacts the first guide roller 500, so that the film 1 is conveyed in a circuitous manner inside the frame body 100 through the first guide roller 500.
[0031] The side of the ink printed on the film 1 is located on the side away from the first guide roller 500, so that the film 1 will never contact the first guide roller 500 and other components during the conveying process by the first guide roller 500, avoiding the adhesion of the undried ink on other contact objects, reducing the printing clarity on the surface of the film 1, or causing deformation and blurring of the printed pattern and text, etc.
[0032] To improve the drying effect of the device and reduce the stretching rate of the film during the drying process, a hot air duct 10 and a cold air duct 20 are provided inside the frame body 100. The hot air duct 10 blows the hot air flow towards the side of the film 1 printed with ink, and the cold air duct 20 blows the cold air flow towards the side of the film 1 without ink. That is, the cold air duct 20 and the hot air duct 10 are separated by the film 1. One side of the film 1 is in the cold air flow and the other side is in the hot air flow, avoiding the deformation of the film 1 due to being in the hot air flow for a long time.
[0033] It should be noted that both the hot air flow and the cold air flow enter from one side of the frame body 100 and discharge from the other side, so that the flow directions of the hot air flow and the cold air flow are perpendicular to the conveying direction of the film 1. In this way, the hot air flow performs high-temperature drying on the ink layer on the surface of the film 1, and the cold air flow cools the other side of the film 1. This can not only effectively protect the film, but also improve the drying efficiency. In this embodiment, the air flow flows along the surface direction of the film, and there is no air flow pressure perpendicular to the surface of the film. Therefore, this embodiment minimizes the deformation influence of the air flow pressure on the film.
[0034] Specifically, a cold air flow inlet 103 and a hot air flow inlet 104 are opened on the front side wall of the frame body 100, a cold air flow outlet 105 and a hot air flow outlet 106 are opened on the rear side wall of the frame body 100. The cold air flow inlet 103 is communicated with the front end of the cold air duct 20, the cold air flow outlet 105 is communicated with the rear end of the cold air duct 20, the hot air flow inlet 104 is communicated with the front end of the hot air duct 10, and the hot air flow outlet 106 is communicated with the end of the hot air duct 10.
[0035] To further cool the dried film 1 to avoid the adhesion of the ink printed on the film 1 to the second deflector roller 600, the device further includes a cold air chamber 700 provided at the end of the film conveying path. The cold air chamber 700 is used for the cold air flow to pass through. The cold air flow can further cool the film 1 after the drying treatment to avoid large elastic deformation of the film 1 due to pulling during the process of collecting into a roll.
[0036] The air flow in the cold air cavity is as follows: The cold air flow in the cold air cavity 700 enters the cold air cavity 700 from the through hole 107 on the front side wall of the frame body 100 and discharges from the through hole 107 on the rear side wall of the frame body 100. The cold air flow in the cold air cavity 700 flows along a direction parallel to the surface of the film 1 and perpendicular to the film conveying direction.
[0037] It should be noted that in this embodiment, a first cold air pipe 30, a hot air pipe 50, and a second cold air pipe 40 are correspondingly arranged on the front side wall of the frame body 100. The first cold air pipe 30 is communicated with the cold air duct 20 through the cold air flow inlet 105. The hot air pipe 1 is communicated with the hot air duct 10 through the hot air flow inlet 104. The second cold air pipe 40 is communicated with the cold air cavity 70 through the through hole 107 on the front side wall of the frame body 100. The first cold air pipe 30 and the second cold air pipe 40 are communicated with an external cold air source through pipes to provide cold air flow through the external cold air source. The hot air pipe 50 is communicated with an external hot air source through a pipe to provide hot air flow through the external hot air source.
[0038] In this embodiment, the printing roller 300 is located above the ink liquid level in the ink cartridge 200 and does not contact the ink liquid level. A sponge 201 is arranged in the ink cartridge 200. The sponge 201 is used to apply the ink in the ink cartridge 200 onto the rotating printing roller 300. In this way, the ink in the ink cartridge can soak the sponge. The soaked sponge evenly applies the ink onto the surface of the printing roller 300 as the printing roller rotates, which can avoid the problem that the printing roller 300 directly contaminates the ink and causes too much ink on the surface of the printing roller 300.
[0039] To ensure that the sponge 201 can transfer the ink from the ink cartridge 200 to the printing roller 300, the lower end of the sponge 201 is fixedly connected to the bottom of the ink cartridge 200, and the upper end of the sponge 201 contacts the lower end of the printing roller 300. The sponge 21 is in a compressed state. In this way, the lower end of the sponge 201 can always maintain contact with the ink in the ink cartridge 200, and the upper end of the sponge 201 can always contact the surface of the printing roller 300.
[0040] It should be noted that the printing roller 300 is driven by a motor A arranged on the front side wall or the rear side wall of the frame body 100. One or more of the first guide roller 500 or the second guide roller 600 are driven by a motor B designed on the front side wall or the rear side wall of the frame body 100. The first guide roller 500 or the second guide roller 600 driven by the motor B can provide power for the film transmission process, avoiding the film being subjected to a large pulling force only by pulling and conveying through the end collecting roller.
[0041] Of course, the speed at which the printing surface is formed during the rotation of the printing roller 300 is the same as the film conveying speed, that is, during the rotation of the printing roller, the circumferential rotation speed of the outer circumference of the printing roller is the same as the film conveying speed to ensure the accuracy of printing.
[0042] Further, in order to ensure that the film entering through the film inlet 101 is in line contact (i.e., tangent) with the printing roller, a top roller 800 is provided inside the frame body on the left side of the printing roller and the pressure roller. The printing surface of the film 1 is deflected at the top of the top roller 800 so that the film 1 enters between the printing roller 300 and the pressure roller 400 in a downwardly inclined state. Specifically, a part of the film 1 is wound around the pressure roller 400, and the printing surface of the film 1 is in line contact with the printing roller 300.
[0043] It should be understood that the present utility model is described by means of some embodiments. Those skilled in the art know that, without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.
Claims
1. A film printing and drying device, comprising a frame body, the frame body is in the shape of a hollow box, a film feed port and a film discharge port are opened on the left wall of the frame body, an ink cartridge, a printing roller and a pressing roller are arranged in sequence from bottom to top near the bottom of the frame body, and a plurality of first guide rollers are arranged on the upper side of the pressing roller inside the frame body, characterized in that: A hot air duct and a cold air duct are arranged inside the frame body. The hot air duct blows hot air to the side of the film printed with ink, and the cold air duct blows cold air to the side of the film without ink. One side of the film is in the cold air flow and the other side is in the hot air flow, so as to prevent the film from being deformed under the hot air flow for a long time.
2. A film printing and drying device according to claim 1, characterized in that: The hot air flow and the cold air flow both enter from one side of the frame body and are discharged from the other side, so that the flow directions of the hot air flow and the cold air flow are perpendicular to the conveying direction of the film.
3. A film printing and drying device according to claim 2, characterized in that: A cold air inlet and a hot air inlet are provided on the front side wall of the rack body, and a cold air outlet and a hot air outlet are provided on the rear side wall of the rack body. The cold air inlet is connected to the front end of the cold air duct, and the cold air outlet is connected to the rear end of the cold air duct. The hot air inlet is connected to the front end of the hot air duct, and the hot air outlet is connected to the end of the hot air duct.
4. A film printing and drying device according to claim 3, characterized in that: The first guide rollers are an even number and are symmetrically arranged inside the frame body. When in use, the unprinted side of the film printed by the printing roller directly contacts the first guide roller, so that the film is conveyed in a circuitous manner inside the frame body through the first guide roller.
5. A film printing and drying device according to claim 4, characterized in that: A second guide roller is arranged obliquely below a first guide roller at the end of the film circuitous path, and the cold air duct and the film treated by the cold air duct are transported to the film discharge port through the second guide roller.
6. A film printing and drying device according to claim 5, characterized in that: The device also includes a terminal cold air chamber arranged at the end of the film conveying path, and the cold air chamber is used for cold air flow to pass through.
7. A film printing and drying device according to claim 6, characterized in that: The cold air flow in the cold air chamber enters the cold air chamber from the through hole of the front side wall of the frame body and is discharged from the through hole of the rear side wall of the frame body. The cold air flow in the cold air chamber flows parallel to the film surface and perpendicular to the film conveying direction.
8. A film printing and drying device according to any one of claims 1 to 7, characterized in that: The printing roller is located above the ink liquid level in the ink cartridge and does not contact the ink. A sponge is arranged in the ink cartridge.
9. A film printing and drying device according to claim 8, characterized in that: The lower end of the sponge is fixedly connected to the bottom of the ink cartridge, the upper end of the sponge is in contact with the lower end of the printing roller, and the sponge is in a compressed state.