Film product surface cleaning assembly line

Abstract

The utility model discloses a film product surface cleaning assembly line which comprises a machine frame and an air injection unit which is fixed in the machine frame and comprises at least one air nozzle, and the air nozzle is connected with an air source and used for injecting cleaning air with certain pressure and flow speed to the upper surface of a film product. The gas treatment unit is connected between the gas source and the gas injection unit; the film product conveying unit and the collecting unit located below the film product conveying unit generate negative pressure below the narrow-band conveying belt, and dust and impurities blown off by airflow are collected while the film products are adsorbed on the narrow-band conveying belt. The film cleaning device is simple in structure, all functional units are produced and assembled in a modular mode, film products are effectively prevented from wrinkling in the cleaning process in an up-blowing and down-sucking mode, and the whole device is stable and reliable; the self-rotating nozzle is adopted, the film product is cleaned in a non-contact mode, automatic rotation and air injection cleaning can be achieved through air flow in the air inlet pipe, 360-degree dead-corner-free cleaning is achieved on the film product, and other external power sources are not needed. The speed regulating assembly of the self-rotating nozzle enables the air flow in the air outlet pipe to continuously fluctuate, and a pulse type cleaning effect is formed on the surface of the film product.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cleaning equipment, specifically relates to a thin film product surface cleaning assembly line. BACKGROUND

[0002] In modern industrial production and daily life, thin film materials are widely used in various fields, such as electronic display screen manufacturing, optical lens film, food packaging, etc. However, in the production, transportation, storage and processing of thin films, their surfaces are easily contaminated with dust, impurity particles, oil stains and other pollutants, which can seriously affect the quality and performance of the thin films, such as reducing the display clarity of electronic display screens, affecting the light transmittance of optical lenses, and reducing the hygiene standards of food packaging, etc.

[0003] At present, common thin film cleaning methods include wiping and water washing, but these methods have some limitations. For example, a thin film cleaning device disclosed in Chinese patent CN208879152U sets up a cylinder, a cleaning plate, a moving column, a cloth and a clamping block, starts the cylinder, and the cylinder drives the moving column to move, the moving column drives the cleaning plate to move down, and the cleaning plate drives the cloth to contact the thin film to realize cleaning. However, such wiping method may scratch the surface of the thin film, and the cleaning effect is not good for some small particles; water washing method needs subsequent drying treatment, which is easy to leave water stains on the surface of the thin film, and cannot be used in some water-sensitive thin film application scenarios. Therefore, the existing technology also uses a rubber roller to clean the adhered impurities, such as disclosed in Chinese patents CN221361670U and CN210333471U, which uses a rubber roller to clean the dust and impurities on the surface of the object to be processed, with high cleaning efficiency and good cleaning effect. However, for thin film products, due to their thin thickness, it is difficult to select the adhesion force of the rubber roller, and slight overload will cause the thin film product to be stuck from the conveying line, causing production accidents. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the deficiencies of the prior art, and provides a thin film product surface cleaning assembly line.

[0005] The utility model achieves the above-mentioned purpose by the following technical scheme:

[0006] A thin film product surface cleaning assembly line, comprising: a rack,

[0007] A gas jet unit is fixed in the rack, which includes at least one gas jet nozzle connected to a gas source for spraying cleaning gas with a certain pressure and flow rate onto the upper surface of the thin film product;

[0008] A gas treatment unit is arranged above the air jet unit and connected between the gas source and the air jet unit, and comprises a filtering device for pre-treating the gas provided by the gas source to remove particulate impurities therefrom.

[0009] A film product conveying unit comprises a driving roller, a driven roller, and a narrow belt conveying belt arranged between the two rollers, for driving the film product on the narrow belt conveying belt to pass below the air jet unit at a stable speed.

[0010] A collecting unit is arranged below the film product conveying unit, for generating a negative pressure below the narrow belt conveying belt, and collecting dust and impurities blown off by the air flow while the film product is adsorbed on the narrow belt conveying belt.

[0011] Preferably, the gas treatment unit further comprises a heating device and / or a dehumidifying device for heating or dehumidifying the gas according to the material of the film and the cleaning requirement.

[0012] Preferably, the air jet unit comprises a gantry frame spanning above the narrow belt conveying belt, and the air jet nozzles are fixed on the gantry frame, and when the number of air jet nozzles is greater than two, the spacing between the air jet nozzles is the same.

[0013] Preferably, the air jet nozzle is a self-rotating nozzle comprising a base, an air inlet pipe arranged above the base in the axial direction, and air outlet pipes arranged below the base in a symmetrical and vertical manner, the air inlet pipe is arranged in the base and pivotally connected thereto, the air inlet pipe and the air outlet pipes are respectively in communication with a hollow cavity of the base, and the end of each air outlet pipe is provided with an air jet hole and a self-driving hole, the air outlet directions of the two self-driving holes are opposite to drive the base to rotate relative to the air inlet pipe.

[0014] Preferably, the two self-driving holes are symmetrically offset on both sides of the symmetry axis of the base.

[0015] Preferably, a flow sensor is arranged on the air inlet pipe.

[0016] Preferably, a speed regulating assembly is further arranged on the base, and comprises a speed regulating shell arranged on the base, a sliding block slidingly arranged in the speed regulating shell, and a spring arranged between the sliding block and the inner wall of the speed regulating shell.

[0017] Preferably, the collecting unit comprises an air suction pump and a drawer-type or pipeline-type collecting frame, and a filter screen is arranged in the collecting frame.

[0018] Preferably, the gas treatment unit and the collecting unit are arranged in the rack and surrounded by an openable and closable plate structure.

[0019] The utility model discloses a beneficial effect mainly reflects: simple structure, various function unit modular production, assemble, prevent the film product from producing the fold in the cleaning process through the mode of blowing down and sucking, and the whole equipment is stable and reliable, adopt the self -rotating type nozzle, and the film product is contacted cleaning, through the airflow in the air inlet pipe can realize automatic rotation and carry out the air -jet cleaning, to the film product 360's dead angle cleaning without, need not other power source of external connection, the speed regulating assembly of self -rotating type nozzle, make the airflow in the air outlet pipe unceasingly fluctuate, form the pulse type cleaning effect to the surface of film product, the setting of flow sensor guarantees the stability of ventilation volume, and the consistency of cleaning effect is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model discloses a further description of technical scheme is made below to the attached drawing:

[0021] Figure 1 The utility model discloses an embodiment's three -dimensional schematic view;

[0022] Figure 2 The utility model discloses an embodiment's three -dimensional schematic view of air -jet unit;

[0023] Figure 3 The utility model discloses an embodiment's three -dimensional schematic view of film product transmission unit;

[0024] Figure 4 The utility model discloses an embodiment's three -dimensional schematic view of air -jet nozzle's first embodiment;

[0025] Figure 5 The utility model discloses an embodiment's front view of air -jet nozzle's first embodiment;

[0026] Figure 6 The utility model discloses an embodiment's plan view of air -jet nozzle's first embodiment;

[0027] Figure 7 The utility model discloses an embodiment's three -dimensional schematic view of air -jet nozzle's second embodiment;

[0028] Figure 8 The utility model discloses an embodiment's front view of air -jet nozzle's second embodiment. DETAILED DESCRIPTION

[0029] The utility model will be described in detail below in combination with the specific embodiment shown in the attached drawing. But these embodiments are not limited to the utility model, and the conversion of structure, method or function made by the ordinary skill in the art according to these embodiments is included in the protection scope of the utility model.

[0030] In the description of the scheme, it needs to be explained that the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. And in the description of the scheme, with reference to the operator, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0031] As shown in Figures 1 to 3 The utility model discloses a kind of thin film product surface cleaning flow line, comprising: rack 1, air jet unit 2, gas processing unit 3, thin film product transmission unit 4 and collection unit 5.

[0032] The air jet unit 2 is fixed in the rack 1, including at least one air jet nozzle 21, the air jet nozzle 21 is connected with gas source, for spraying clean gas with certain pressure and flow rate on the upper surface of thin film product 100, such as compressed air, nitrogen and the like. The outlet shape and size of air jet nozzle are designed according to the width of film and the required cleaning range, which can adopt the form of linear arrangement of multiple small holes or long narrow gap to ensure the formation of uniform air flow on the upper surface of film. Specific structure is described in detail below.

[0033] The gas processing unit 3 is located above the air jet unit 2, connected between the gas source (not shown in the figure) and the air jet unit 2, including filtering device, for pretreating the gas provided by the gas source, removing the particulate impurities therein, preventing secondary pollution of the surface of thin film product 100. Of course, it can also include heating device and dehumidifying device, according to the material and cleaning requirements of thin film product, the gas is heated or dehumidified to improve the cleaning effect. For example, for some viscous oil pollution, the gas with appropriate heating can make it more easily carried away by air flow.

[0034] The thin film product transmission unit 4 includes driving roller 41, driven roller 42 and narrow belt transmission belt 43 located between the two, for driving the thin film product 100 located on the narrow belt transmission belt to pass below the air jet unit at a stable speed; Ensure the continuity and stability of air jet cleaning process. The speed of driving roller can be adjusted according to the material, thickness and pollution degree of film to achieve the best cleaning effect and production efficiency.

[0035] The collecting unit 5 is located below the film product conveying unit 4, and is used for generating negative pressure below the narrow belt conveying belt 43 to collect dust and impurities blown off by the air flow while the film product 100 is adsorbed on the narrow belt conveying belt 43. Specifically, due to the special structure of the narrow belt, part of the film product 100 is not covered on the narrow belt, and the collecting unit 5 includes an air suction pump and a drawer type or pipeline type collecting frame, and a filter screen is arranged in the collecting frame. The air suction pump is used for generating negative pressure below the narrow belt conveying belt 43 to adsorb the film product 100 on the narrow belt conveying belt 43, and the dust and impurity particles cleaned from the upper surface of the film product 100 are blown off from both sides of the film product 100 by the air blowing unit 2, and the negative pressure generated by the air suction pump is used for sucking the dust and impurity particles into the collecting frame.

[0036] In the preferred embodiment, the gas treatment unit 3 and the collecting unit 5 are arranged in the rack 1, and are surrounded by openable and closable plate structures to form an aesthetic appearance.

[0037] As shown in Figure 2 The air blowing unit 2 includes a gantry 22 which is horizontally arranged above the narrow belt conveying belt 43, and the air blowing nozzles 21 are fixed on the gantry 22, and the spacing between the air blowing nozzles 21 is the same when the number of the air blowing nozzles 21 is greater than two.

[0038] The air blowing nozzle is also a feature of the utility model. As shown in the first embodiment of the air blowing nozzle, Figures 4 to 6 The air blowing nozzle 21 is a self-rotating nozzle, which includes a base 2101, an air inlet pipe 2102 which is arranged above the base 2101 in the axial direction, and air outlet pipes 2103 which are symmetrically and vertically fixed below the base 2101, the air inlet pipe 2102 is arranged in the base 2101 and is pivotally connected to the base 2101, the air inlet pipe 2102 and the air outlet pipes 2103 are respectively communicated with a hollow cavity 2104 of the base 2101, the end of each air outlet pipe 2103 is provided with an air blowing hole 2105 and a self-driving hole 2106, the air outlet directions of the two self-driving holes 2106 are opposite to drive the base 2101 to rotate relative to the air inlet pipe 2102. The two self-driving holes 2106 are symmetrically offset on both sides of a symmetry axis 2111 of the base 2101.

[0039] When the gas from the gas source enters the inlet pipe 2102 after passing through the gas processing unit 3, it enters the outlet pipe 2103 after passing through the hollow cavity 2104. Part of the gas is ejected from the jet hole 2105 facing the film product 100 for cleaning; the other part is ejected from the self-driving hole 2106, driving the base 2101 to rotate relative to the inlet pipe 2102. This causes the jet hole 2105 to rotate around the axis of the base 2101, achieving 360° cleaning of the film product without any dead angles, without the need for an external power source.

[0040] As is well known to those skilled in the art, the gas pressure ejected from the jet hole 2105 may be the same as or different from the gas pressure ejected from the self-driving hole 2106. According to Bernoulli's principle, the diameters of the jet hole 2105 and the self-driving hole 2106 may be the same or different.

[0041] Preferably, the air inlet pipe 2102 of this invention is equipped with a flow sensor 2110 to ensure stable airflow and consistent cleaning effect.

[0042] like Figures 7 to 8 The second embodiment of the jet nozzle shown differs from the first embodiment in that a speed regulating component is further provided on the base 2101. This component includes a speed regulating shell 2107 disposed on the base 2101, a sliding block 2108 slidably disposed therein, and a spring 2109 disposed between the sliding block 2108 and the inner wall of the speed regulating shell 2107. When the base 2101 rotates relative to the air intake pipe 2102 at different speeds, the base 2101 and the sliding block 2108 within it generate different centrifugal forces. This causes the sliding block 2108 to move against the elastic force of the spring 2109. When the sliding block 2108 moves, it affects the gas flow rate, resulting in a decrease in the gas flow rate and speed of the self-driving orifice 2106. When the spring 2109 drives the sliding block 2108 to reset, the gas flow rate of the self-driving orifice 2106 recovers. In this way, the base 2101 rotates in a pulsed manner, and the airflow in the exhaust pipe fluctuates continuously, creating a pulsed cleaning effect on the surface of the film product.

[0043] The following is a brief description of the air-jet cleaning method for the upper surface of the thin film according to this invention, including the following steps:

[0044] Gas pretreatment steps: First, the gas supplied by the gas source enters the gas treatment unit, and particulate impurities are removed by the filtration device. Then, as needed, the gas is heated to a predetermined temperature range by the heating device, or the humidity of the gas is reduced by the dehumidification device, so that the treated gas meets the cleanliness requirements of the film product.

[0045] The gas after pretreatment enters the air jet unit and is jetted at high speed from the air jet nozzle to form a gas flow with a certain pressure and flow rate to hit the upper surface of the film product. The gas flow generates shearing force and impact force on the upper surface of the film product, blows off the contaminants such as dust, impurity particles and oil stains attached to the film from the film surface, and makes the contaminants suspended in the gas flow.

[0046] The contaminants blown off by the gas flow move downward along the gas flow into the collection unit, are captured by the filter screen, adsorption material and the like in the collection unit and stored, so that the cleaning process of the upper surface of the film is completed, and the cleaned film continues to be processed or treated in subsequent processes under the driving of the film conveying unit.

[0047] In actual application, the film product to be cleaned is first adsorbed on the film conveying unit to ensure that the film product is tensioned and can run smoothly.

[0048] The gas source is started, and the gas such as compressed air provided by the gas source first enters the gas treatment unit. In the gas treatment unit, the gas passes through multiple layers of filter devices in sequence. The filter devices can adopt filter screens with different precision, such as primary filter, medium efficiency filter and high efficiency filter, which can effectively remove small particle impurities in the gas to ensure that the gas entering the air jet unit has extremely high cleanliness and avoids secondary pollution to the film. According to the material of the film and the type of surface contaminants, a heating device can be selected to heat the gas. For example, for some plastic films with sticky oil stains on the surface, the gas is heated to 40-60 DEG C, so that the viscosity of the oil stain is reduced and the oil stain is more easily blown off the film surface by the gas flow. At the same time, if the environmental humidity is large, it may affect the performance of some films such as optical films for electronic display screens. At this time, a dehumidification device can be started to reduce the relative humidity of the gas to 30%-50% to ensure the safety and effectiveness of the cleaning process.

[0049] The gas after pretreatment enters the air jet unit and is jetted at high speed from the air jet nozzle. The pressure and flow rate of the gas flow can be adjusted according to the material of the film product and the degree of pollution. Generally, the pressure of the gas flow is controlled to be between 0.2-0.5 MPa, and the flow rate is between 10-30 m / s, which can generate sufficient shearing force and impact force to effectively remove various contaminants on the upper surface of the film.

[0050] Through the above device and method, various contaminants on the upper surface of the film can be efficiently and non-destructively cleaned, the quality and performance of the film product are improved, the demand for clean film in different fields is met, and the application prospect and market value are wide.

[0051] The following are some specific embodiments of the present application:

[0052] Thin film cleaning in electronic display manufacturing: In the production process of organic light-emitting diode (OLED) display, the flexible film used for packaging needs to ensure that the surface is free of impurities before entering the bonding process. The film is installed on a transmission roller driven by a high-precision motor, and the transmission speed is set to 3 m / min to make it pass through the air jet cleaning device smoothly. The air source provides compressed air filtered by three filters: primary, medium, and high-efficiency filters. First, the air is heated to 50°C by an electric heating device to reduce the stickiness of organic contaminants that may exist on the surface of the film. The air jet nozzle sprays air onto the upper surface of the film at a pressure of 0.3 MPa and a flow rate of 20 m / s. The dust and organic impurity particles blown off are captured by the drawer-type collection unit below, which has two layers of stainless steel screens with mesh sizes of 100 and 500, respectively, and an activated carbon adsorption layer, effectively preventing the film and the working environment from being contaminated again. After air jet cleaning, the particle contamination on the surface of the film is reduced by more than 95%, meeting the requirements of subsequent high-precision bonding processes, significantly improving the yield and product quality of the display.

[0053] Optical lens film cleaning: For high-transparency films used in optical lens film, small dust and oil on the surface can seriously affect the optical performance after film application. The drive of the transmission roller is controlled by a servo motor, and the speed is adjusted to 2 m / min to ensure that the film passes through the air jet cleaning area at a constant speed. Nitrogen gas is selected as the cleaning gas, which is filtered and dehumidified before being sprayed out of a specially designed narrow slit nozzle. The slit width is 0.5 mm, the gas pressure is maintained at 0.4 MPa, and the flow rate reaches 25 m / s. The strong airflow can effectively remove dust particles smaller than 5 μm and thin oil layers on the surface of the film. The collection unit uses a pipeline structure connected to an external vacuum suction device, with high-efficiency glass fiber filters and oil-repellent adsorbent materials inside the pipeline, which not only collect dust but also adsorb trace amounts of oil. After air jet cleaning, the transmittance of the film increases by 3%-5%, and the haze decreases by about 2%, ensuring that the optical lens after film application has a clear and high-transparency visual effect, meeting the quality standards of high-end optical products.

[0054] Food packaging film cleaning: In the food packaging industry, plastic film used for packaging food must be kept clean and sanitary. The film transmission speed is set to 4 m / min to meet the needs of mass production. The air jet cleaning device uses compressed air that has been filtered and treated with ultraviolet sterilization. The gas pressure sprayed by the air jet nozzle is 0.25 MPa, and the flow rate is 15 m / s. It can blow off dust, fibers and other impurities on the surface of the film. The collection unit uses an inclined stainless steel tray to facilitate the sliding of collected impurities into the trash can. A layer of fine nylon filter screen is covered on the top of the tray to prevent impurities from flying. Through this air jet cleaning method, the microbial and impurity content on the surface of the food packaging film is greatly reduced, meeting the food safety and hygiene standards, effectively extending the shelf life of food and protecting the health of consumers.

[0055] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0056] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present application, and are not intended to limit the scope of protection of the present application. Any equivalent embodiments or modifications made without departing from the spirit of the present application should be included within the scope of protection of the present application.

Claims

1. A thin film product surface cleaning line, characterized in that, The utility model relates to a film product cleaning device, including: Rack (1), Jet unit (2) is fixed in the rack (1), including at least one jet nozzle (21), the jet nozzle (21) is connected with gas source, is used for the clean gas with a certain pressure and flow rate to the film product (100) upper surface jet, Gas processing unit (3) is located above the jet unit (2), is connected between the gas source and the jet unit (2), including filter device, is used for the gas provided by the gas source is pretreated, removes the particulate impurities therein, Film product transmission unit (4) includes driving roller (41), driven roller (42) and the narrow belt transmission belt (43) between the two, for the film product (100) on the narrow belt transmission belt is driven to pass below the jet unit with stable speed, Collecting unit (5) is located below the film product transmission unit (4), is used for generating negative pressure below the narrow belt transmission belt (43), while the film product (100) is adsorbed on the narrow belt transmission belt (43), the dust and impurities blown off by the air flow are collected.

2. The thin film product surface cleaning flowline of claim 1, wherein, The gas processing unit further comprises a heating device and / or a dehumidifying device for heating or dehumidifying the gas according to the material of the film and the cleaning requirement.

3. The thin film product surface cleaning flowline of claim 1, wherein, The jet unit (2) comprises a gantry (22) spanning above the narrow belt transmission belt (43), and the jet nozzles (21) are fixed on the gantry (22). When the number of jet nozzles (21) is greater than two, the spacing between the jet nozzles (21) is the same.

4. The thin film product surface cleaning flowline of claim 3, wherein, The jet nozzle (21) is a self-rotating nozzle comprising a base (2101), an air inlet pipe (2102) disposed above the base (2101) in the axial direction, and air outlet pipes (2103) symmetrically and vertically fixed below the base (2101). The air inlet pipe (2102) is provided in the base (2101) and is pivotally connected to the base (2101). The air inlet pipe (2102) and the air outlet pipes (2103) are respectively in communication with a hollow cavity (2104) of the base (2101). The end of each air outlet pipe (2103) is provided with a jet hole (2105) and a self-driving hole (2106). The air outlet directions of the two self-driving holes (2106) are opposite to drive the base (2101) to rotate relative to the air inlet pipe (2102).

5. The thin film product surface cleaning flowline of claim 4, wherein, The two self-driving holes (2106) are symmetrically offset on both sides of a symmetry axis (2111) of the base (2101).

6. The thin film product surface cleaning flowline of claim 4, wherein, A flow sensor (2110) is arranged on the air inlet pipe (2102).

7. The thin film product surface cleaning flowline of claim 4, wherein, A speed regulating assembly is further arranged on the base (2101) and comprises a speed regulating shell (2107) arranged on the base (2101), a sliding block (2108) slidingly arranged in the speed regulating shell (2107), and a spring (2109) arranged between the sliding block (2108) and the inner wall of the speed regulating shell (2107).

8. The thin film product surface cleaning flowline of claim 1, wherein, The collecting unit (5) comprises an air suction pump and a drawer-type or pipeline-type collecting frame, and a filter screen is arranged in the collecting frame.

9. The thin film product surface cleaning flowline of claim 1, wherein, The gas treatment unit (3) and the collecting unit (5) are both arranged in the rack (1) and are surrounded by openable and closable plate structures.

Images