CN113663872B - Coating device for improving utilization rate of high-viscosity material - Google Patents

Coating device for improving utilization rate of high-viscosity material Download PDF

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Publication number
CN113663872B
CN113663872B CN202110959541.7A CN202110959541A CN113663872B CN 113663872 B CN113663872 B CN 113663872B CN 202110959541 A CN202110959541 A CN 202110959541A CN 113663872 B CN113663872 B CN 113663872B
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coating
pump
module
valve
supply pump
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CN113663872A (en
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徐建煌
张恒
王锦山
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Shanghai De Hu Coating Equipment Co ltd
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Shanghai De Hu Coating Equipment Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0245—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to a moving work of indefinite length, e.g. to a moving web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1007—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material
    • B05C11/1013—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material responsive to flow or pressure of liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1026—Valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C13/00—Means for manipulating or holding work, e.g. for separate articles
    • B05C13/02—Means for manipulating or holding work, e.g. for separate articles for particular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface

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  • Coating Apparatus (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The utility model provides a improve device of filming of high viscosity material utilization ratio, it includes the feed module, first coating module, second coating module, wash module and control module, the feed module includes the distribution tool bit, tool bit pressure monitor, the liquid storage pot, first liquid feed pump, first pump pressure monitor, first material valve, first bleeder valve, second material valve, the second bleeder valve, first connecting valve, second connecting valve and control valve, control module is configured to be based on the pressure value of first pump pressure monitor, the pressure value of second pump pressure monitor, the pressure value of tool bit pressure monitor, the fluctuation of the pressure value of first pump pressure monitor, the fluctuation of the pressure value of second pump pressure monitor and the fluctuation of the pressure value of tool bit pressure monitor, control first material valve, first bleeder valve, first connecting valve, second material valve, the second bleeder valve, The second connecting valve and the control valve are opened and closed, and the movement rate of the distributing cutter head are controlled.

Description

Coating device for improving utilization rate of high-viscosity material
The application is filed as29/06/2020Application No. is202010606606.5The invention is named asHigh viscosity Coating device and coating method for materialThe divisional application of (1).
Technical Field
The disclosure particularly relates to a coating device for improving the utilization rate of high-viscosity materials.
Background
The production of PI films has become a key to this field in existing curved and folded panel manufacturing. The PI film production process generally includes: synthesizing PI slurry, coating the PI slurry and imidizing the PI slurry to form a film. The traditional film forming method of the non-transparent PI comprises a dipping method, a casting stretching method and the like, but the method is not suitable for the production of the transparent PI film with extremely high requirement on the uniformity of the film. The conventional film-forming methods for transparent PI include spin coating, blade coating, slit coating, and the like. Among them, slit coating has become the main choice for PI coating of flexible panels because of its advantages such as good uniformity of film formation, applicability to larger substrate sizes, and high production efficiency. Slot coating is generally divided into two modes, sheet coating and roll-to-roll coating. The sheet coating uses hard glass as a substrate, while the roll-to-roll coating needs a flexible substrate as a substrate, and the uniformity of the roll-to-roll coating is poorer than that of the sheet coating, and the sheet coating is selected as the mainstream internationally.
The sheet type coating can be roughly divided into three steps of pre-coating, film coating and cutter head cleaning. Pre-coating: after the equipment is started, the liquid supply system and the distributing cutter head are filled, the distributing cutter head moves to a pre-coating area, coating operation is started, and due to the fact that the coating state is unstable, coating is performed for a period of time, the shape and uniformity of a liquid film meet requirements, and the pre-coating operation is finished. Film coating: after the pre-coating operation is finished, the equipment enters a stable coating state, the distribution cutter head moves to the position above the glass substrate, and the coating operation is formally carried out. Cleaning a tool bit: after the coating operation is completed, the distributing cutter head moves to the cleaning area for cleaning.
However, the sheet type coating equipment is often used for coating and generating photoresist in panel production, the viscosity of the photoresist is half below 50cps, the cleaning agent can quickly dissolve and take away the residual photoresist, but the viscosity of the PI slurry is basically more than 7000cps, the dissolving speed of the solvent to the PI slurry is slow, so that when the PI film is produced by using the sheet type coating, the problem that a precoating area cannot quickly clean the residual high-viscosity material, a large amount of cleaning agent is needed, and the uniformity of a coating film is poor exists.
Disclosure of Invention
The present disclosure has been made in view of the above-described state of the art, and an object thereof is to provide a high-viscosity material coating apparatus and a coating method capable of quickly cleaning residues of a high-viscosity material, reducing the amount of a cleaning agent used, and improving coating uniformity.
To this end, the first aspect of the present disclosure provides a coating apparatus suitable for a developed high viscosity material, characterized in that: the method comprises the following steps: the feeding module comprises a distributing cutter head for outputting high-viscosity materials, a cutter head pressure monitor, a liquid storage tank, a liquid supply pump, a pump pressure monitor, a suction valve, a discharge valve, a connecting valve and a control valve, wherein the cutter head pressure monitor is arranged on the distributing cutter head and used for monitoring the pressure in an inner cavity of the distributing cutter head; the pre-coating module comprises a flexible base material for bearing the high-viscosity material output by the distribution cutter head, a supporting part for supporting the flexible base material, and a winding roller and an unwinding roller for winding the flexible base material, wherein if the winding roller rotates, the flexible base material moves from the unwinding roller to the winding roller through the supporting part; the coating module comprises a substrate bearing platform and a substrate arranged on the substrate bearing platform, wherein the substrate is used for bearing the high-viscosity material output by the distribution tool bit; cleaning module, it include the tool bit washing tank with set up in inside just being used for fixing of tool bit washing tank the tool bit of distribution tool bit washs and presss from both sides, the tool bit wash press from both sides to distribution tool bit sprays cleaner and dry air in order to accomplish the washing of distribution tool bit, and control module, it is configured as based on pump pressure monitor's pressure value tool bit pressure monitor's pressure value fluctuation with tool bit pressure monitor's fluctuation of pressure value, control inhale the material valve the bleeder valve the connecting valve with the switching of control valve, and control the distribution tool bit is in on the flexible substrate or removal and rate of movement on the base plate. In the present disclosure, the precoating module winds the flexible substrate by using the winding roller and the unwinding roller, and supports the flexible substrate by using the supporting portion, and if the winding roller rotates, the flexible substrate moves from the unwinding roller to the winding roller through the supporting portion. Therefore, the high-viscosity material residue can be quickly cleaned, and the high-viscosity material can be conveniently cleaned and recovered. The control module controls the movement and the movement speed of the distribution tool bit of the feeding module and controls the opening and closing of the suction valve, the discharge valve, the connecting valve and the control valve of the feeding module based on the pressure value and the fluctuation of the pump pressure monitor and the pressure value and the fluctuation of the tool bit pressure monitor. This ensures the stability of the state of the coating film and improves the uniformity of the coating film. The cleaning module fixes the distribution tool bit by using the tool bit cleaning clamp, and sprays cleaning agent and dry air to the distribution tool bit to complete the cleaning of the distribution tool bit. This can reduce the amount of the cleaning agent used.
In the coating apparatus according to the present disclosure, the distribution blade may be a pre-coating step when the distribution blade is located in the pre-coating module, and the coating step may be a coating step when the distribution blade is located in the coating module, in the pre-coating process, calculating a difference value between the pressure value of the pump pressure monitor and the pressure value of the cutter head pressure monitor, if the difference value meets a preset difference value and the fluctuation of the pressure value of the pump pressure monitor and the fluctuation of the pressure value of the cutter head pressure monitor are within a preset fluctuation range, when the pre-coating process is finished, the control module controls the distributing tool bit to move from the pre-coating module to the coating module to execute the coating process, after the coating is finished, the control module controls the distributing tool bit to move to the cleaning module to clean, otherwise, when the pre-coating process is finished, the control module controls the distribution cutter head to repeatedly execute the pre-coating process in the pre-coating module. Therefore, whether the precoating meets the requirement of the coating uniformity can be judged by the control module based on the pressure value and the fluctuation of the pump pressure monitor and the pressure value and the fluctuation of the cutter head pressure monitor.
In the coating apparatus according to the present disclosure, optionally, the control module opens the material suction valve to keep other valves closed until the liquid feed pump finishes feeding, after the feeding is finished, the control module opens the discharge valve to close other valves to discharge gas in the liquid feed pump, after the gas is discharged, the control module closes the discharge valve and controls the distribution cutter head to move above the supporting portion of the pre-coating module, the liquid feed pump performs a slight material squeezing operation, if a pressure value of the pump pressure monitor reaches a preset value, the control module opens the connection valve and the control valve, the pressure in the inner cavity of the distribution cutter head gradually increases, if a pressure value of the cutter head pressure monitor reaches a preset value, the control module closes the control valve, and the distribution cutter head outputs the high-viscosity material at a preset output rate to perform pre-coating, after the pre-coating process is finished, the pressure value of the pump pressure monitor and the pressure value of the cutter head pressure monitor are positive, the liquid supply pump performs slight material suction operation until the pressure value of the pump pressure monitor is zero, the control module closes the connecting valve and opens the material suction valve, the liquid supply pump starts to feed, after the feeding is finished, the liquid supply pump carries out slight extrusion operation until the pressure value of the pump pressure monitor reaches a preset value, if the film coating process is executed, the control module opens the connecting valve, the distributing tool bit outputs the high-viscosity material at a preset output speed for coating, if the pre-coating process is repeatedly executed, the control module opens the connecting valve, the dispenser head outputs the high-viscosity material at a preset output rate for pre-coating, and the steps after the pre-coating process is completed are repeated. Therefore, the control module can be used for controlling the closing of each valve, avoiding the backflow phenomenon of high-viscosity materials and the generation of bubbles, and ensuring the stability of the state during film coating so as to improve the uniformity of the film coating.
In the coating device related to the present disclosure, optionally, the supporting portion is a flexible substrate carrying platform or a flexible substrate supporting roller, the flexible substrate carrying platform is made of marble or metal, and the flexible substrate supporting roller is made of metal. Thus, the flexible substrate can be supported by the flexible substrate supporting platform or the flexible substrate supporting roller.
In the coating device related to the present disclosure, optionally, a plurality of small holes which are uniformly distributed and connected to a vacuum pump are provided on the flexible substrate supporting platform, and the small holes are used for adsorbing the flexible substrate in the pre-coating process. This enables the flexible base material to be more favorably fixed by suction.
In the coating apparatus according to the present disclosure, each of the pipe lines between the liquid reservoir, the liquid supply pump, and the dispenser head may be equal in diameter. Thereby, pressure and speed variations of the high-viscosity material flowing in the pipeline can be avoided.
The second aspect of the present disclosure provides a coating apparatus for a high-viscosity material suitable for mass production, which is characterized in that: the method comprises the following steps: the feed module comprises a distribution tool bit for outputting high-viscosity materials, a tool bit pressure monitor for monitoring the pressure of an inner cavity of the distribution tool bit, a liquid storage tank for storing the high-viscosity materials, a first liquid supply pump, a first pump pressure monitor for monitoring the pressure of the inner cavity of the first liquid supply pump, a second pump pressure monitor for monitoring the pressure of the inner cavity of the second liquid supply pump, a first suction valve for controlling the on-off of a first pipeline between the liquid storage tank and the first liquid supply pump, a first discharge valve for controlling the on-off of a second pipeline between the liquid storage tank and the first liquid supply pump, a second suction valve for controlling the on-off of a third pipeline between the liquid storage tank and the second liquid supply pump, and a second discharge valve for controlling the on-off of a fourth pipeline between the liquid storage tank and the second liquid supply pump, The first connecting valve is used for controlling the on-off of a pipeline between the first liquid supply pump and the distributing cutter head, the second connecting valve is used for controlling the on-off of a pipeline between the second liquid supply pump and the distributing cutter head, and the control valve is used for controlling the on-off of a pipeline between the distributing cutter head and the liquid storage tank; a first coating module comprising a first substrate support platform and a first substrate disposed on the first substrate support platform, the first substrate for supporting the high viscosity material output by the dispensing tip; a second coating module comprising a second substrate support platform and a second substrate disposed on the second substrate support platform, the second substrate for supporting the high viscosity material output by the dispensing tip; the cleaning module comprises a cutter head cleaning groove and a cutter head cleaning clamp which is arranged in the cutter head cleaning groove and used for fixing the distribution cutter head, the cutter head cleaning clamp sprays cleaning agent and dry air to the distribution cutter head to complete cleaning of the distribution cutter head, and the cleaning module is arranged between the first coating module and the second coating module; and a control module configured to control opening and closing of the first suction valve, the first discharge valve, the first connection valve, the second suction valve, the second discharge valve, the second connection valve, and the control valve, and control movement and movement rate of the dispensing tip on the first substrate or the second substrate, based on a pressure value of the first pump pressure monitor, a pressure value of the second pump pressure monitor, a pressure value of the tip pressure monitor, fluctuation of a pressure value of the first pump pressure monitor, fluctuation of a pressure value of the second pump pressure monitor, and fluctuation of a pressure value of the tip pressure monitor. In the present disclosure, the control module controls the movement and moving rate of the distributing cutter head of the feeding module and controls the open-closed state of each valve of the feeding module based on the pressure value of the first pump pressure monitor and its fluctuation, the pressure value of the second pump pressure monitor and its fluctuation, the pressure value of the cutter head pressure monitor and its fluctuation. This ensures stable coating conditions and improves the uniformity of the coating film. The cleaning module fixes the distribution tool bit by using the tool bit cleaning clamp, and sprays cleaning agent and dry air to the distribution tool bit to complete the cleaning of the distribution tool bit. This can reduce the amount of the cleaning agent used. The first coating module and the second coating module are used for coating, the pre-coating module is omitted, the utilization rate of high-viscosity materials can be improved, and the production efficiency of coating is improved.
In the coating apparatus according to the present disclosure, optionally, the control module opens the first and second suction valves to keep the other valves closed until the first and second liquid supply pumps finish feeding, after the feeding is finished, the control module opens the first and second discharge valves to close the other valves to discharge the gas in the first and second liquid supply pumps, after the gas is discharged, the control module closes the first and second discharge valves and controls the dispensing blade to move above the first substrate of the first coating module, and then the first and second liquid supply pumps perform a slight squeezing operation, and if the pressure values of the first and second pump pressure monitors reach a preset value, the control module opens the first and control valves, and the pressure in the cavity of the dispensing blade gradually increases, if the pressure value of the cutter head pressure monitor reaches a preset value, the control module closes the control valve, the distributing cutter head outputs the high-viscosity material at a preset output rate for coating, after the coating of the first coating module is finished, the pressure value of the first pump pressure monitor and the pressure value of the cutter head pressure monitor are positive, the first liquid supply pump slightly sucks the material until the pressure value of the first pump pressure monitor is zero, the control module closes the first connecting valve and moves the distributing cutter head to be above a second base plate of the second coating module, the control module opens the first sucking valve and the second connecting valve, the first liquid supply pump starts feeding, the second liquid supply pump provides the high-viscosity material to the distributing cutter head at a preset output rate so that the distributing cutter head outputs the high-viscosity material at the preset output rate for coating, in the process of providing the high-viscosity material by the second liquid supply pump, the first liquid supply pump performs a slight extrusion operation after feeding is completed, if the pressure value of the first pump pressure monitor reaches a preset value, the first liquid supply pump stops the slight extrusion operation and waits for the distribution tool bit to complete film coating, after the film coating of the second coating module is completed, the pressure value of the second pump pressure monitor and the pressure value of the tool bit pressure monitor are positive, the second liquid supply pump performs a slight suction operation until the pressure value of the second pump pressure monitor is zero, the control module closes the second connecting valve and moves the distribution tool bit to the position above the first substrate of the first coating module, the control module opens the first connecting valve and the second suction valve, the second liquid supply pump starts feeding, and the first liquid supply pump provides the high-viscosity material to the distribution tool bit at a preset output rate so that the distribution tool bit can supply the high-viscosity material at the preset output rate Outputting the high-viscosity material at a preset output rate to perform film coating, performing slight extrusion operation after the feeding of the second liquid supply pump is finished in the process of supplying the high-viscosity material by the first liquid supply pump, stopping the slight extrusion operation by the second liquid supply pump if the pressure value of the second pump pressure monitor reaches a preset value, waiting for the film coating of the first coating module by the distributing tool bit, and repeating the steps after the film coating of the first coating module is finished. Therefore, the control module can be used for determining the switching time of the distribution cutter head between the first coating module and the second coating module based on the pressure value of the first pump pressure monitor, the pressure value of the second pump pressure monitor and the fluctuation thereof and the pressure value of the cutter head pressure monitor and the fluctuation thereof so as to ensure the stability of the coating state and improve the coating uniformity.
In the coating apparatus according to the present disclosure, the diameters of the respective pipes between the reservoir tank, the first fluid feed pump, the second fluid feed pump, and the dispenser head may be equal to each other. Thereby, pressure and speed variations of the high-viscosity material flowing in the pipeline can be avoided.
In the coating apparatus according to the present disclosure, the coating apparatus may further include a plurality of robot arms, wherein the first coating module transports the first substrate on which coating is completed and places the first substrate on which coating is not performed, after coating is completed, and the second coating module transports the second substrate on which coating is completed and places the second substrate on which coating is not performed, after coating is completed. This can improve the production efficiency of the coating film.
In the coating apparatus according to the present disclosure, optionally, the high viscosity material is one of PI paste, PAA paste, or UV paste. Thus, a PI film, a PAA film, or a UV film having higher uniformity can be obtained.
In the coating apparatus according to the present disclosure, the dispensing head may optionally include a material feeding port having an arc shape or an inverted triangle shape. Thereby, the accumulation of high viscosity material at the dispensing tip can be reduced.
In the coating apparatus according to the present disclosure, the blade cleaning jig may optionally include a cleaning agent injection needle for injecting a cleaning agent, an air injection needle for injecting dry air, and a scraper jig. Therefore, the residual high-viscosity material of the distributing tool bit can be better cleaned, and the cleaning agent is saved.
The third aspect of the present disclosure provides a coating method for a developed high-viscosity material, which is applied to the above coating apparatus, and is characterized in that: the film coating method comprises the following steps: (a) preparing a high-viscosity material, opening a suction valve to keep other valves closed, allowing the high-viscosity material to enter a liquid supply pump, opening a discharge valve to close other valves to discharge gas in the liquid supply pump if the liquid supply pump finishes feeding, closing the discharge valve and controlling a distribution cutter head to move above a supporting part of a pre-coating module after the gas is discharged, slightly extruding the material by the liquid supply pump to enable the pressure value of a pump pressure monitor to reach a preset value, opening a connecting valve and a control valve, and outputting the high-viscosity material to be pre-coated by the distribution cutter head at a preset output rate if the pressure in an inner cavity of the distribution cutter head is gradually increased to the preset value and closing the control valve; (b) in the pre-coating process, calculating a difference value between a pressure value of the pump pressure monitor and a pressure value of the cutter head pressure monitor, if the difference value meets a preset difference value and the fluctuation of the pressure value of the pump pressure monitor and the fluctuation of the pressure value of the cutter head pressure monitor are within a preset fluctuation range, controlling the distribution cutter head to move from the pre-coating module to the coating module for coating when the pre-coating is finished, otherwise, controlling the distribution cutter head to continuously pre-coat in the pre-coating module when the pre-coating is finished; when the pre-coating is finished, the pressure value of the pump pressure monitor and the pressure value of the cutter head pressure monitor are positive, the liquid feed pump performs slight material suction operation until the pressure value of the pump pressure monitor is zero, the connecting valve is closed, the material suction valve is opened, the liquid feed pump starts feeding, and after the feeding is finished, the liquid feed pump performs slight material extrusion operation until the pressure value of the pump pressure monitor reaches a preset value; and (c) if coating is performed, opening the connection valve, outputting the high-viscosity material at a preset output rate by the distributing cutter head for coating, cleaning the distributing cutter head after coating is completed, if precoating is repeated, opening the connection valve, outputting the high-viscosity material at a preset output rate by the distributing cutter head for precoating, and repeating the steps (b) and (c). In the present disclosure, the movement and the moving rate of the distributing cutter head are controlled and the opening and closing of the suction valve, the discharge valve, the connection valve and the control valve are controlled based on the pressure value of the pump pressure monitor and the fluctuation thereof, and the pressure value of the cutter head pressure monitor and the fluctuation thereof. Thus, it is possible to determine whether or not the precoating satisfies the requirement of coating film uniformity, to avoid the occurrence of a backflow phenomenon of a high-viscosity material and bubbles, and to improve the coating film uniformity by ensuring the stability of the state during coating.
In the coating method according to the present disclosure, optionally, the cleaning the dispenser head includes: the distributing tool bit enters a tool bit cleaning groove, the tool bit cleaning clamp clamps the lower edge of the distributing tool bit and moves from the left edge of the distributing tool bit to the right edge of the distributing tool bit, and meanwhile, the distributing tool bit is sprayed with a cleaning agent and dry air to complete cleaning of the distributing tool bit. Therefore, the residual high-viscosity material of the distributing tool bit can be better cleaned, and the cleaning agent is saved.
In the coating method related to the present disclosure, optionally, if the supporting portion is a flexible substrate supporting platform, the distributing tool bit moves from one side of the flexible substrate supporting platform to the other side of the flexible substrate supporting platform and outputs the high-viscosity material for pre-coating, if the supporting portion is a flexible substrate supporting roller, the distributing tool bit is disposed above the flexible substrate supporting roller and outputs the high-viscosity material, and the flexible substrate supporting roller, the winding roller and the unwinding roller rotate at the same linear velocity for pre-coating. Therefore, the high-viscosity material residue can be quickly cleaned, and the high-viscosity material can be conveniently cleaned and recovered.
In the coating method according to the present disclosure, optionally, the high viscosity material is one of PI paste, PAA paste, or UV paste. Thereby, it is possible to perform coating using one of the PI paste, the PAA paste, or the UV paste to obtain a PI film, a PAA film, or a UV film having higher uniformity.
The fourth aspect of the present disclosure provides a coating method for a high viscosity material suitable for mass production, applied to the above coating apparatus, wherein: the method comprises the following steps: (u) preparing the high viscosity material, opening the first and second suction valves to keep the other valves closed, the high-viscosity material enters a first liquid supply pump and a second liquid supply pump, if the first liquid supply pump and the second liquid supply pump finish feeding, the first discharge valve and the second discharge valve are opened to close other valves so as to discharge gas in the first liquid supply pump and the second liquid supply pump, after the gas is discharged, closing the first and second discharge valves and controlling the dispensing tip to move over the first substrate of the first coating module, then the first liquid supply pump and the second liquid supply pump perform slight extrusion operation to enable the pressure values of the first pump pressure monitor and the second pump pressure monitor to reach preset values, the first connecting valve and the control valve are opened, if the pressure in the inner cavity of the distributing cutter head gradually increases to the preset values, the control valve is closed, and the distributing cutter head outputs the high-viscosity material at a preset output rate to perform film coating; (v) after the coating of the first coating module is finished, setting the pressure value of the first pump pressure monitor and the pressure value of the cutter head pressure monitor to be positive, carrying out slight material suction operation by the first liquid supply pump until the pressure value of the first pump pressure monitor is zero, closing the first connecting valve, moving the distribution cutter head to the position above the second base plate of the second coating module, opening the first material suction valve and the second connecting valve, starting feeding by the first liquid supply pump, providing the high-viscosity material to the distribution cutter head at a preset output rate by the second liquid supply pump so that the high-viscosity material is output by the distribution cutter head at the preset output rate for coating, carrying out slight material extrusion operation after the feeding by the first liquid supply pump is finished in the process of providing the high-viscosity material by the second liquid supply pump, and if the pressure value of the first pump pressure monitor reaches a preset value, the first liquid supply pump stops slight extrusion operation and waits for the distribution cutter head to finish coating; (w) after the coating of the second coating module is completed, setting the pressure value of the second pump pressure monitor and the pressure value of the cutter head pressure monitor to be positive, performing a slight suction operation by the second liquid supply pump until the pressure value of the second pump pressure monitor is zero, closing the second connection valve, moving the distribution cutter head to a position above the first substrate of the first coating module, opening the first connection valve and the second suction valve, starting the feeding by the second liquid supply pump, supplying the high-viscosity material to the distribution cutter head at a preset output rate by the first liquid supply pump so that the distribution cutter head outputs the high-viscosity material at the preset output rate for coating, performing a slight squeezing operation after the feeding by the second liquid supply pump is completed during the supplying of the high-viscosity material by the first liquid supply pump, and if the pressure value of the second pump pressure monitor reaches a preset value, the second liquid supply pump stops a slight extrusion operation to wait for the distributing tool bit to finish the film coating of the first coating module, and repeats the steps (v) and (w); and (x) cleaning the dispenser bit after the first coating module finishes coating a preset number of times.
In the present disclosure, the movement and moving rate of the distributing head and the open/close state of each valve are controlled based on the pressure value of the first pump pressure monitor and its fluctuation, the pressure value of the second pump pressure monitor and its fluctuation, and the pressure value of the head pressure monitor and its fluctuation. Therefore, the backflow phenomenon of the high-viscosity material and the generation of air bubbles can be avoided, the stability of the state during film coating is ensured, the uniformity of the film coating is improved, the utilization rate of the high-viscosity material can be improved based on the alternate film coating of the first coating module and the second coating module, and the production efficiency of the film coating is improved.
In the coating method according to the present disclosure, optionally, the cleaning step includes: the distribution tool bit gets into the tool bit washing tank, the tool bit washs the clamp and blocks the distribution tool bit lower limb and follow the distribution tool bit left side is along moving extremely the distribution tool bit right side is right simultaneously the distribution tool bit sprays the cleaner and sprays dry air, in order to accomplish right the washing of distribution tool bit. Therefore, the high-viscosity material residue can be quickly cleaned, and the high-viscosity material can be conveniently cleaned and recovered.
In the coating method according to the present disclosure, optionally, the high viscosity material is one of PI paste, PAA paste, or UV paste. Thereby, it is possible to perform coating using one of the PI paste, the PAA paste, or the UV paste to obtain a PI film, a PAA film, or a UV film having higher uniformity.
According to the present disclosure, it is possible to provide a coating apparatus and a coating method for a high-viscosity material, which can quickly clean the residue of the high-viscosity material, reduce the amount of a cleaning agent used, and improve the uniformity of the coating film.
Drawings
Fig. 1 shows a block diagram of a coating apparatus suitable for developing high viscosity materials according to an example of the present disclosure.
Fig. 2 shows a schematic view of a part of a coating apparatus for a developed high-viscosity material according to an example of the present disclosure.
Fig. 3 is a schematic configuration diagram showing a modification of the precoat module applied to a developed high-viscosity material coating apparatus according to an example of the present disclosure.
Fig. 4 shows a schematic structural view of a supply module of a coating device suitable for developing high viscosity materials according to an example of the present disclosure.
Fig. 5 shows a flow chart of a coating method suitable for a developed high viscosity material according to an example of the present disclosure.
Fig. 6 shows a block diagram of a coating apparatus suitable for mass production of high viscosity materials according to an example of the present disclosure.
Fig. 7 is a schematic view showing a partial structure of a coating apparatus suitable for mass production of a high-viscosity material according to an example of the present disclosure.
Fig. 8 shows a schematic structural view of a supply module of a coating apparatus suitable for mass production of high viscosity materials according to an example of the present disclosure.
Fig. 9 shows a side view of a dispensing bit of a feeder module of a coating device suitable for mass production of high viscosity materials according to an example of the present disclosure.
Fig. 10 shows a flowchart of a coating method suitable for mass production of high viscosity materials according to an example of the present disclosure.
Detailed Description
Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, the same components are denoted by the same reference numerals, and redundant description thereof is omitted. The drawings are schematic and the ratio of the dimensions of the components and the shapes of the components may be different from the actual ones.
[ first embodiment ]
The embodiment discloses a coating device and a coating method for a high-viscosity material, which can quickly clean the residue of the high-viscosity material, reduce the using amount of a cleaning agent and improve the uniformity of a coating film. The coating apparatus and the coating method for a high-viscosity material according to the present embodiment are suitable for a high-viscosity material that has been developed. The coating apparatus and the coating method suitable for the developed high viscosity material may be simply referred to as a coating apparatus and a coating method.
Fig. 1 shows a block diagram of a coating apparatus 1 suitable for developing a high viscosity material according to an example of the present disclosure. In the present embodiment, as shown in fig. 1, the coating apparatus 1 may include a supply module, a pre-coating module, a cleaning module, and a control module. The pre-coating module can comprise a rolling roller and an unreeling roller, so that the high-viscosity material residues can be quickly cleaned, and the high-viscosity material is conveniently cleaned and recycled. The feed module includes a distribution head 110, a plurality of valves, and a plurality of pressure monitors, and the control module can control the movement and rate of movement of the distribution head 110 of the feed module and control the opening and closing of the respective valves based on the pressure values of the pressure monitors and their fluctuations. This ensures the stability of the state of the coating film and improves the uniformity of the coating film. The cleaning module comprises a tool bit cleaning clamp, so that the using amount of cleaning agents can be reduced.
Fig. 2 shows a schematic view of a part of the structure of a coating apparatus 1 suitable for developing a high viscosity material according to an example of the present disclosure.
In some examples, the film coating apparatus 1 may include a coating module, as described above. The coating module may be used to perform a coating film. Specifically, the coating module may provide a coating area where a coating film may be applied by a dispensing blade 110 (described later) of the supply module.
In some examples, as shown in fig. 2, a coating module may include a substrate-carrying platform 101 and a substrate 102. The substrate 102 may be disposed on a substrate support platform 101. The substrate supporting platform 101 may be made of marble or metal. The material of the substrate 102 may be glass. The substrate supporting platform 101 may be provided with a plurality of small holes uniformly distributed and connected to a vacuum pump. The pores may be used to attract the substrate 102 during the coating process. This enables the substrate 102 to be better sucked and fixed. Examples of the present disclosure are not limited thereto and the distribution of the small holes may be non-uniform.
In some examples, a coated film region may be disposed on the substrate 102. The dispensing tip 110 can deliver the high viscosity material 103 to the coating zone for coating. The dispenser 110 moves at a predetermined speed from one side of the coating region to the other side of the coating region when coating. In some examples, as shown in fig. 2, the base plate 102 may be used to carry a high viscosity material 103 output by a dispensing tip 110 (described later). In other examples, the coating film area may be the upper surface of the substrate 102. That is, the dispensing tip 110 outputs the high viscosity material 103 to completely cover the substrate 102.
In some examples, the film coating apparatus 1 may include a precoat module, as described above. The precoating module may be used to perform precoating.
In the existing precoating modules, a precoating wheel in the precoating module is used for bearing high-viscosity materials, namely, a distributing cutter head directly performs a precoating operation on the precoating wheel. During pre-coating, the high viscosity material adheres to the pre-coating wheel and the coated part is rotated to the lower part of the pre-coating wheel for cleaning. Because the high viscosity material dissolves slowly and is difficult to wash, the part that has coated the high viscosity material can rotate to the below of distributing the tool bit once more, make the operation of precoating can not get into stable coating state fast, and the mixture of the high viscosity material on the wheel of precoating and cleaner also can block up and pollute the distributing tool bit, the module of precoating of this embodiment can avoid the part that has coated the high viscosity material to reach the below of distributing the tool bit once more effectively, and then make the operation of precoating get into stable coating state fast, and avoid the mixture of the high viscosity material on the wheel of precoating and cleaner to block up and pollute the distributing tool bit.
In some examples, as shown in fig. 2, the pre-coat module may include a flexible substrate 105. The flexible substrate 105 may be used to carry the high viscosity material 103 output by the dispensing tip 110.
In some examples, the flexible substrate 105 may be provided with a pre-coat region thereon. The dispensing tip 110 may pre-coat the high viscosity material 103 at the pre-coating area.
In some examples, the precoat module may include a support. The support portion may be used to support the flexible substrate 105.
In some examples, as shown in fig. 2, the support may be a flexible substrate support platform 106. The flexible substrate support platform 106 may be marble or metal. Thereby, the flexible substrate 105 can be supported by the flexible substrate support table 106. In some examples, the length of the flexible substrate support platform 106 may be shorter than the length of the substrate support platform 101.
In some examples, the flexible substrate support platform 106 may be provided with a plurality of small holes uniformly distributed and connected to a vacuum pump. Small holes may be used to attract the flexible substrate 105 during the pre-coating process. This enables the flexible base material 105 to be more favorably fixed by suction. Examples of the present disclosure are not limited thereto and the distribution of the small holes may be non-uniform.
In some examples, a pre-coat region may be disposed on the flexible substrate 105 on the flexible substrate support platform 106. In precoating, the distributing blade 110 is moved from one side of the precoating area to the other side of the precoating area at a preset speed.
In some examples, as shown in fig. 2, the pre-coat module may include a take-up roller 104 and an unwind roller 107. A wind-up roller 104 and a wind-down roller 107 may be used to wind the flexible substrate 105. If the take-up roller 104 rotates, the flexible substrate 105 moves from the unwind roller 107 to the take-up roller 104 through a support (e.g., a flexible substrate support platform 106). Therefore, the cleaning and the recovery of the high-viscosity material can be facilitated.
Fig. 3 is a schematic configuration diagram showing a modification of the precoat module of the coating apparatus 1 suitable for a high-viscosity material to be developed according to an example of the present disclosure. The precoating module in the modification can solve the problem that a high-viscosity material is dissolved slowly and is difficult to clean, and the problem that precoating is discontinuous and slowly enters a stable coating state is avoided.
In a variant, the precoating module may be in roll-to-roll form. Specifically, as shown in fig. 3, the precoating module may include a winding roller 301, an unwinding roller 302, a flexible substrate 303, and a support. Wherein the support portion is a flexible substrate support roller 304. Thereby, the flexible base material 303 can be supported by the flexible base material support roller 304.
In a variation, the flexible substrate support roller 304 may be a metal. The flexible substrate support roller 304 may have good straightness.
In a modification, the wind-up roller 301 and the wind-down roller 302 may be used to wind the flexible base material 303. If the take-up roller 301 rotates, the flexible substrate 303 moves from the unwind roller 302 to the take-up roller 301 through the flexible substrate support roller 304.
In the modification, the relative position of the dispensing blade 110 and the flexible substrate support roller 304 is not changed, the dispensing blade 110 outputs the high-viscosity material to the flexible substrate support roller 304, and the flexible substrate support roller 304, the winding roller 301, and the unwinding roller 302 may rotate at the same linear velocity to perform the pre-coating. For example, the control module (described later) controls the dispensing tip 110 to move to a position directly above the flexible substrate support roller 304 and in a radial direction of the flexible substrate support roller 304, and then controls the dispensing tip 110 to descend to a predetermined position without contact between the lower edge (i.e., the feed opening) of the dispensing tip 110 and the flexible substrate 303 on the flexible substrate support roller 304. The winding roller 301, the unwinding roller 302 and the flexible substrate supporting roller 304 rotate at the same linear speed to drive the flexible substrate 303 to move at a constant speed, and the dispensing tool bit 110 outputs a high-viscosity material at a preset output rate to perform a pre-coating operation. The preset position can be set according to actual requirements.
In a variation, the speed of the flexible substrate 303 and the preset output rate of the dispensing tip 110 can be adjusted for different high viscosity materials. The pre-coat time is related to the speed of the flexible substrate 303, the preset output rate of the dispensing tip 110, and the different high viscosity materials.
Fig. 4 shows a schematic structural view of a supply module of the coating device 1 suitable for developing a high viscosity material according to an example of the present disclosure.
In some examples, the film coating apparatus 1 may include a supply module, as described above. The feeder module may be used to provide the high viscosity material 103.
In some examples, as shown in fig. 2 or 4, the feed module may include a dispensing bit 110. The dispensing tip 110 may be used to output the high viscosity material 103. Specifically, the dispenser bit 110 may output the high-viscosity material 103 at a preset output rate when performing pre-coating or film coating. The movement and rate of movement of the dispensing tip 110 on the flexible substrate 105 or base plate 102 is controlled by a control module (described later). The pre-coating process is performed when the dispenser bit 110 is located in the pre-coating module, and the coating process is performed when the dispenser bit 110 is located in the coating module.
In some examples, the dispenser head 110 includes a delivery opening that is arcuate or inverted triangular in shape. Thereby, accumulation of the high-viscosity material 103 at the dispensing tip 110 can be reduced. Preferably, the material delivery opening of the dispenser head 110 has an inverted triangular shape. This can reduce the processing cost.
In some examples, the size of the dispensing nozzle of the dispenser head 110 may be adjustable. The size of the material conveying opening can be determined according to the viscosity of the high-viscosity material and the requirement of a coating film pattern. Thereby, it can be helpful to control the dispensing or output rate of the high viscosity material on the substrate 102.
In some examples, the height of the dispenser head 110 to the base plate 102 may be adjusted by a height adjustment module (not shown) of the film coating device 1. This ensures that the delivery opening of the dispenser head 110 is maintained at a minimum height above the base plate 102, and does not contact the surface of the base plate 102.
In some examples, the distribution tool head 110 may be fixed under the air floating gantry device (not shown) and move linearly with the air floating gantry. Wherein, the air-floating gantry device can comprise a height control mechanism. The height control mechanism in the air floating gantry device precisely adjusts the height of the dispenser head 110 through the gantry according to the detected change in the height of the substrate 102 relative to the dispenser head 110. The height control mechanism may replace the height adjustment module of the film coating apparatus 1.
In some examples, as shown in FIG. 4, the feed module may include a bit pressure monitor 402. A bit pressure monitor 402 may be provided at the dispense bit 110 and used to monitor dispense bit lumen pressure. The pressure value monitored by the bit pressure monitor 402 may be output to the control module.
In some examples, as shown in FIG. 4, the feed module may include a reservoir 403. The fluid reservoir 403 may be used to store the high viscosity material 103. The reservoir 403 is in communication with the dispensing bit 110 via a conduit.
In some examples, the high viscosity material 103 may be one of PI (polyimide) paste, PAA (polyamic acid) paste, or UV glue (shadowless glue). Thus, a PI film, a PAA film, or a UV film having higher uniformity can be obtained. But examples of the present disclosure are not limited thereto and the high viscosity material 103 may be other paste. The viscosity of the high viscosity material may be 5000cps or more. For example, the viscosity of the high viscosity material may be 5000-.
In some examples, as shown in fig. 4, the feed module may include a feed pump 405. The fluid supply pump 405 is in communication with the fluid reservoir 403 via a plurality of lines. For example, the fluid supply pump 405 and the fluid reservoir 403 communicate through two lines. The two lines may include a first line and a second line. Wherein the liquid feed pump 405 obtains the high-viscosity material 103 in the liquid storage tank 403 through the first pipe. The fluid supply pump 405 discharges air or the high-viscosity material to the fluid reservoir 403 through the second pipe. The present example is not limited thereto, and the liquid supply pump 405 and the liquid storage tank 403 communicate through three or more pipes. That is, the liquid supply pump 405 may obtain the high-viscosity material in the liquid storage tank 403 through a plurality of pipes. The fluid supply pump 405 may vent air or high viscosity material to the fluid reservoir 403 through a plurality of lines.
In some examples, as shown in fig. 4, fluid supply pump 405 is in communication with dispensing bit 110 via a conduit. Thus, the fluid supply pump 405 can deliver high viscosity material through the tubing to the dispensing bit 110. In some examples, fluid supply pump 405 may be a diaphragm pump. The diaphragm pump can be precisely controlled. This enables more accurate control of the liquid feed pump 405 to feed the high-viscosity material 103 to the dispenser bit 110.
In some examples, as shown in FIG. 4, the feed module may include a pump pressure monitor 404. Pump pressure monitor 404 may be disposed on fluid supply pump 405 and used to monitor the fluid supply pump lumen pressure. The pressure value monitored by pump pressure monitor 404 may be output to the control module.
In some examples, as shown in fig. 4, the feed module may include a suction valve 406. A suction valve 406 may be disposed on the first line between the reservoir 403 and the feed pump 405. The suction valve 406 may be used to open and close a first line between the reservoir 403 and the fluid supply pump 405. The suction valve 406 receives a signal from the control module to perform an opening or closing operation.
In some examples, as shown in fig. 4, the feed module may include a discharge valve 408. Discharge valve 408 may be disposed on a second line between reservoir 403 and fluid supply pump 405. Discharge valve 408 may be used to open and close a second line between reservoir 403 and feed pump 405. The discharge valve 408 receives a signal from the control module to perform an opening or closing operation.
In some examples, as shown in fig. 4, the feed module may include a connection valve 407. A connection valve 407 may be provided between the fluid supply pump 405 and the dispensing bit 110. A connection valve 407 may be used to open and close the line between the fluid supply pump 405 and the dispenser head 110.
In some examples, as shown in fig. 4, the feed module may include a control valve 409. The control valve 409 may be disposed between the reservoir 403 and the dispensing bit 110. The control valve 409 may be used to control the connection and disconnection of the line between the dispenser head 110 and the reservoir 403.
In some examples, the respective tubing diameters between the reservoir 403, the feed pump 405, and the dispensing bit 110 are equal. This makes it possible to avoid a change in pressure and speed when the high-viscosity material flows through the pipe, and thus to avoid an unstable coating state.
In some examples, the film coating apparatus 1 may include a cleaning module, as described above. The cleaning module may be used to clean the dispenser bit 110.
In some examples, as shown in fig. 2, the cleaning module may include a bit cleaning groove 108 and a bit cleaning clip 109 disposed inside the bit cleaning groove 108 and configured to secure a dispensing bit 110. The bit cleaning jig 109 sprays cleaning agent and dry air to the dispensing bit 110 to complete the cleaning of the dispensing bit 110.
In some examples, the bit cleaning clip 109 may include a cleaning agent injection needle for injecting a cleaning agent, an air injection needle for injecting dry air, and a scraper clip. This enables the high-viscosity material 103 remaining on the dispenser blade 110 to be cleaned more effectively, thereby saving the cleaning agent. However, the present embodiment is not limited thereto, and other spraying means may be used for spraying the cleaning agent or the dry air.
In some examples, a scraper clip may be provided at the front end of the cleaning agent injection needle. Before the cleaning agent is sprayed, the scraping clamp can be used for scraping the high-viscosity material accumulated on the material conveying opening of the distributing cutter head 110, so that the cleaning agent can be cleaned better, and the cleaning agent is saved.
In some examples, the film coating apparatus 1 may include a control module, as described above. The control module may be used to control the movement of the dispensing head 110 and the opening and closing of the various valves of the feed module.
In the existing film coating device, the liquid supply pump and the distribution cutter head are connected through a pipeline, because the viscosity of the high-viscosity material is higher, the high-viscosity material has larger internal resistance in the liquid supply pump, the pipeline and the distribution cutter head, and when the distribution cutter head discharges and sucks the material by the liquid supply pump, the liquid storage tank, a larger pressure difference exists between the liquid supply pump and the distribution cutter head, if the pressure difference is ignored, the stable film coating state can be damaged and the high-viscosity material flows backwards and mixes the material, and the like, in the film coating device 1 of the embodiment, the pressure value of the pump pressure monitor 404 and the pressure value of the cutter head pressure monitor 402 are monitored by the control module in real time so as to avoid the stability of the film coating state from being damaged and the high-viscosity material flows backwards and mixes the material and the like.
In some examples, the control module may receive a pressure value of pump pressure monitor 404 and a pressure value of head pressure monitor 402 and monitor fluctuations in the pressure value of pump pressure monitor 404 and fluctuations in the pressure value of head pressure monitor 402.
In some examples, the control module may be configured to control the movement and rate of movement of the dispense head 110 on the flexible substrate 105 or the substrate 102 based on the pressure value of the pump pressure monitor 404, the pressure value of the head pressure monitor 402, fluctuations in the pressure value of the pump pressure monitor 404, and fluctuations in the pressure value of the head pressure monitor 402. Specifically, in the pre-coating process, the control module may calculate a difference between a pressure value of the pump pressure monitor 404 and a pressure value of the tool bit pressure monitor 402, if the difference satisfies a preset difference and fluctuations of the pressure value of the pump pressure monitor 404 and the pressure value of the tool bit pressure monitor 402 are within a preset fluctuation range, when the pre-coating process is completed, the control module controls the distribution tool bit 110 to move from the pre-coating module to the coating module to perform the coating process, and after the coating process is completed, the control module controls the distribution tool bit 110 to move to the cleaning module to clean, otherwise, when the pre-coating process is completed, the control module controls the distribution tool bit 110 to repeatedly perform the pre-coating process in the pre-coating module. Thus, the control module can be used to determine whether the pre-coating meets the requirement of coating uniformity based on the pressure value and the fluctuation of the pump pressure monitor 404 and the pressure value and the fluctuation of the cutter head pressure monitor 402. Additionally, the number of precoatings may depend on empirical formula driven formulas for high viscosity materials.
In some examples, the difference is a pressure difference value of a pressure value of pump pressure monitor 404 minus a pressure value of head pressure monitor 402. In this case, the preset difference value is a positive value and the value is close to 0. The preset fluctuation range may satisfy that the fluctuation of the pressure value at the adjacent time is close to 0. If the difference value meets the preset difference value, the fluctuation of the pressure value of the pump pressure monitor 404 is within the preset fluctuation range, and the fluctuation of the pressure value of the cutter head pressure monitor 402 is within the preset fluctuation range, the pre-coating is completed (i.e. the pre-coating meets the requirement of the uniformity of the coating film). In addition, in the coating process, if the difference value satisfies the preset difference value, the fluctuation of the pressure value of the pump pressure monitor 404 is within the preset fluctuation range, and the fluctuation of the pressure value of the cutter head pressure monitor 402 is within the preset fluctuation range, the coating state is stable, and the uniformity of the coated film is high.
In some examples, the control module may be configured to control the opening and closing of the suction valve 406, the discharge valve 408, the connecting valve 407, and the control valve 409 based on the pressure value of the pump pressure monitor 404, the pressure value of the head pressure monitor 402, fluctuations in the pressure value of the pump pressure monitor 404, and fluctuations in the pressure value of the head pressure monitor 402.
Specifically, the control module opens the suction valve 406 to keep the other valves closed until the feed pump 405 completes feeding. After the feed is completed, the control module opens the discharge valve 408 to close other valves to vent the gas in the feed pump 405. After the gas discharge is completed, the control module closes the discharge valve 408 and controls the dispenser head 110 to move above the support portion of the precoating module. The liquid feed pump 405 slightly extrudes materials, if the pressure value of the pump pressure monitor 404 reaches a preset value, the control module opens the connecting valve 407 and the control valve 409, the pressure in the inner cavity of the distributing cutter head 110 gradually increases, and if the pressure value of the cutter head pressure monitor 402 reaches a preset value, the control module closes the control valve 409, and the distributing cutter head 110 outputs high-viscosity materials at a preset output rate for pre-coating. After the pre-coating process is completed, the pressure value of pump pressure monitor 404 and the pressure value of head pressure monitor 402 are positive, and liquid feed pump 405 performs a slight suction operation until the pressure value of pump pressure monitor 404 is zero. Thereby, the backflow phenomenon of the high-viscosity material and the generation of fine bubbles can be avoided.
When the pressure value of pump pressure monitor 404 is zero, the control module closes connecting valve 407 and opens suction valve 406 and feed pump 405 begins feeding. After the completion of the feeding, the liquid feed pump 405 performs a slight squeezing operation until the pressure value of the pump pressure monitor 404 reaches a preset value. Therefore, pressure fluctuation inside the distributing blade 110 caused by negative pressure inside the liquid feed pump 405 can be avoided, a stable coating state can be destroyed, the precoating time can be reduced, the discharge amount of high-viscosity materials in the precoating process can be reduced, and the high-viscosity materials can be saved.
If the coating process is performed, the control module opens the connection valve 407 and the dispenser head 110 outputs the high viscosity material 103 at a preset output rate for coating. In addition, the dispenser head 110 is simultaneously moved at a predetermined constant moving rate in the coating region during the coating process, whereby a uniform coating film on the substrate 102 can be ensured.
If the pre-coating process is repeatedly performed, the control module opens the connection valve 407, the dispenser bit 110 outputs the high-viscosity material at a preset output rate for pre-coating, and the steps after the pre-coating process is completed are repeated. Therefore, the control module can be used for controlling the closing of each valve, avoiding the backflow phenomenon of high-viscosity materials and the generation of bubbles, and ensuring the stability of the state during film coating so as to improve the uniformity of the film coating. Wherein the preset value is set in relation to the high viscosity material.
In this disclosure, the precoating module winds the flexible substrate by using the winding roller and the unwinding roller, supports the flexible substrate by using the supporting portion, and moves from the unwinding roller to the winding roller through the supporting portion if the winding roller rotates. Therefore, the high-viscosity material residue can be quickly cleaned, and the high-viscosity material can be conveniently cleaned and recovered. The control module controls the movement and rate of movement of the dispensing head 110 of the feed module and controls the opening and closing of the suction valve 406, discharge valve 408, connecting valve 407 and control valve 409 of the feed module based on the pressure value of the pump pressure monitor 404 and its fluctuations, the pressure value of the head pressure monitor 402 and its fluctuations. This ensures the stability of the state of the coating film and improves the uniformity of the coating film. The cleaning module fixes the dispenser bit 110 using the bit cleaning clamp 109 and sprays cleaning agent and dry air to the dispenser bit 110 to complete cleaning of the dispenser bit 110. This can reduce the amount of the cleaning agent used.
In the present embodiment, a coating method suitable for a high viscosity material under development is disclosed, and the coating method is applied to the coating apparatus 1. Fig. 5 shows a flow chart of a coating method suitable for a developed high viscosity material according to an example of the present disclosure.
In the present embodiment, as shown in fig. 5, a coating method suitable for a high viscosity material under development may include a pre-coating step (step S110), a treating step (step S120), and a coating step (step S130).
In step S110, the precoating step specifically includes: preparing a high-viscosity material 103, opening a suction valve 406 to keep other valves closed, allowing the high-viscosity material 103 to enter a liquid feed pump 405, opening a discharge valve 408 to close other valves to discharge gas in the liquid feed pump 405 if the liquid feed pump 405 finishes feeding, closing the discharge valve 408 and controlling a distribution cutter head 110 to move above a supporting part of a pre-coating module after the gas is discharged, slightly extruding the liquid feed pump 405 to enable the pressure value of a pump pressure monitor 404 to reach a preset value, opening a connecting valve 407 and a control valve 409, gradually increasing the pressure in an inner cavity of the distribution cutter head to the preset value, and closing the control valve 409, so that the distribution cutter head 110 outputs the high-viscosity material 103 at a preset output rate to perform pre-coating.
In step S110, the high-viscosity material 103 is stored in the liquid reservoir tank 403. The high viscosity material 103 may be one of PI paste, PAA paste, or UV glue. Thereby, it is possible to perform coating using one of the PI paste, the PAA paste, or the UV paste to obtain a PI film, a PAA film, or a UV film having higher uniformity.
In step S110, if the supporting portion is the flexible substrate supporting platform 106, the distributing tool bit 110 moves from one side of the flexible substrate supporting platform 106 to the other side and outputs the high-viscosity material 103 for pre-coating, if the supporting portion is the flexible substrate supporting roller 304, the distributing tool bit 110 is disposed above the flexible substrate supporting roller 304 and outputs the high-viscosity material 103, and the flexible substrate supporting roller 304, the winding roller 301, and the unwinding roller 302 rotate at the same linear velocity for pre-coating. Therefore, the high-viscosity material residue can be quickly cleaned, and the high-viscosity material can be conveniently cleaned and recovered.
In step S120, the processing step specifically includes: in the pre-coating process, calculating a difference value between the pressure value of the pump pressure monitor 404 and the pressure value of the cutter head pressure monitor 402, if the difference value meets a preset difference value and the fluctuation of the pressure value of the pump pressure monitor 404 and the fluctuation of the pressure value of the cutter head pressure monitor 402 are within a preset fluctuation range, controlling the distribution cutter head 110 to move from the pre-coating module to the coating module for coating when the pre-coating is finished, otherwise, controlling the distribution cutter head 110 to continuously pre-coat in the pre-coating module when the pre-coating is finished; when the precoating is completed, the pressure value of the pump pressure monitor 404 and the pressure value of the cutter head pressure monitor 402 are positive, the liquid feed pump 405 slightly sucks the material until the pressure value of the pump pressure monitor 404 is zero, the connecting valve 407 is closed and the suction valve 406 is opened, the liquid feed pump 405 starts feeding, after the feeding is completed, the liquid feed pump 405 slightly extrudes the material until the pressure value of the pump pressure monitor 404 reaches a preset value. The difference, the preset difference, and the preset fluctuation range can be referred to the description of the coating apparatus 1 described above.
In step S130, the coating step specifically includes: if the coating is performed, the connection valve 407 is opened, the dispenser bit 110 outputs the high viscosity material 103 at a preset output rate to perform the coating, the dispenser bit 110 is cleaned after the coating is completed, and if the precoating is repeated, the connection valve 407 is opened, the dispenser bit 110 outputs the high viscosity material 103 at a preset output rate to perform the precoating, and the steps S120 and S130 are repeated.
In addition, in step S130, when the dispenser head 110 is cleaned, the conventional cleaning agent purging process cannot rapidly dissolve the high-viscosity material, and a large amount of cleaning agent needs to be used for cleaning, so that the cleaning agent is wasted and the process time is increased, in step S130 of this embodiment, cleaning the dispenser head 110 may include controlling the dispenser head 110 to enter a head cleaning groove, the head cleaning clip 109 seizes the lower edge (i.e., the material conveying opening) of the dispenser head 110 and moves from the left edge of the dispenser head 110 to the right edge of the dispenser head 110, and simultaneously spraying the cleaning agent and spraying dry air to the dispenser head 110 to complete cleaning of the dispenser head 110. Thereby, the residual high-viscosity material 103 of the dispenser bit 110 can be better cleaned, the cleaning agent can be saved, and the process time can be reduced.
In the coating method of the present embodiment, the movement and the moving rate of the dispenser head 110 are controlled based on the pressure value and the fluctuation thereof of the pump pressure monitor 404, and the pressure value and the fluctuation thereof of the head pressure monitor 402, and the opening and closing of the suction valve 406, the discharge valve 408, the connection valve 407, and the control valve 409 are controlled. Thus, it is possible to determine whether or not the precoating satisfies the requirement for coating film uniformity, to avoid the occurrence of a backflow phenomenon of a high-viscosity material and bubbles, and to improve the coating film uniformity by ensuring the stability of the state during coating.
In the coating method of the present embodiment, the process from step S110 to step S130 may be regarded as completing one coating process. Namely, a pre-coating treatment is required before each coating treatment. The time between two coating treatments is the residence time.
However, the present embodiment is not limited thereto, and if the high-viscosity material selected can maintain a stable coating state during the residence time, the precoating operation and the washing operation can be omitted when the next coating is performed. In some examples, the dwell time is the time interval between the completion of the current coating process and the start of the next coating process. The residence time may be t1Denotes the dwell time t1Satisfies the following conditions:
Figure BDA0003221555880000211
where μ is the viscosity of the high-viscosity material and v is that of the liquid supply pump 405Feeding of the feedstockSpeed. Assuming that the dispensing head 110 does not output the high-viscosity material, the maximum length of time for which the high-viscosity material is maintained in a stable coating state is t2Maximum duration t2Satisfy t2Is alpha mu, if t1Is less than or equal to t2After the current coating treatment is finished, the next coating treatment can be directly carried out, otherwise, the pre-coating treatment is required before the next coating treatment.
[ second embodiment ]
The embodiment discloses a coating device and a coating method for a high-viscosity material, which can reduce the using amount of a cleaning agent, improve the utilization rate of the high-viscosity material and improve the production efficiency of coating. The coating apparatus and the coating method for a high-viscosity material according to the present embodiment are suitable for mass production of a high-viscosity material. The coating apparatus and the coating method suitable for mass production of high-viscosity materials may be simply referred to as a coating apparatus and a coating method.
Fig. 6 shows a block diagram of a coating apparatus 2 for a high-viscosity material suitable for mass production according to an example of the present disclosure. In the present embodiment, as shown in fig. 6, the film coating device 2 may include a supply module, a first coating module, a second coating module, a cleaning module, and a control module. The first coating module and the second coating module are used for coating, the pre-coating module is omitted, the utilization rate of high-viscosity materials can be improved, and the production efficiency of coating is improved. The cleaning module comprises a tool bit cleaning clamp, so that the using amount of cleaning agents can be reduced. The control module comprises a distribution tool bit, a plurality of valves and a plurality of pressure monitors, and the control module controls the movement and the movement rate of the distribution tool bit of the feeding module and controls the opening and closing of each valve based on the pressure values of the pressure monitors and the fluctuation of the pressure monitors. This ensures stable coating conditions and improves the uniformity of the coating film.
Fig. 7 is a schematic view showing a partial structure of a coating apparatus 2 suitable for mass production of a high-viscosity material according to an example of the present disclosure.
In some examples, the film coating apparatus 2 may include a first coating module, as described above. The first coating module may be used to perform a coating film. Specifically, the first coating module may provide a first coating area 200, and a dispensing blade 206 (described later) of the supply module may perform coating in the first coating area 200.
In some examples, as shown in fig. 7, a first coating module may include a first substrate carrying platform 201 and a first substrate 202. The first substrate 202 may be disposed on the first substrate supporting stage 201. As shown in fig. 7, a first substrate 202 may be used to carry a high viscosity material 203 output by a dispensing tip 206. The material of the first substrate 202 may be glass.
In some examples, a first coating film region 200 may be disposed on the first substrate 202. The dispensing tip 206 can deliver the high viscosity material 203 at a preset delivery rate for coating in the first coating area 200. In addition, the dispensing tip 206 moves from one side of the first coating area 200 to the other side of the first coating area 200 at a predetermined constant moving rate at the time of coating. This ensures a uniform coating film on the substrate.
In some examples, the film coating apparatus 2 may include a second coating module, as described above. The second coating module may be used to perform a coating film. Specifically, the second coating module may provide a second coating film area 207, and a dispensing bit 206 (described later) of the supply module may perform coating in the second coating film area 207.
In some examples, as shown in fig. 7, the second coating module may include a second substrate carrying platform 208 and a second substrate 210. A second substrate 210 may be disposed on the second substrate support platform 208. As shown in fig. 7, a second substrate 210 may be used to carry the high viscosity material 209 output by the dispensing tip 206. Wherein the high-viscosity material 209 and the high-viscosity material 203 in the present disclosure are the same material. The material of the second substrate 210 may be glass.
In some examples, the first substrate support platform 201 and the second substrate support platform 208 may be of marble or metal. The first substrate supporting platform 201 and the second substrate supporting platform 208 may be provided with a plurality of small holes uniformly distributed and connected to a vacuum pump. The pores may be used to attract the first substrate 202 and the second substrate 210, respectively, during the coating process. This enables the first substrate 202 and the second substrate 210 to be fixed by suction. Examples of the present disclosure are not limited thereto and the distribution of the small holes may be non-uniform.
In some examples, the second substrate 210 may be provided with the second coating film region 207 thereon. The dispenser head 206 can deliver the high viscosity material 209 at a preset delivery rate for coating in the second coating region 207. In addition, the dispenser blade 206 moves from one side of the second coating region 207 to the other side of the second coating region 207 at a predetermined constant moving rate during coating. This ensures a uniform coating film on the substrate.
In some examples, the film coating apparatus 2 may include a cleaning module, as described above. The cleaning module may be disposed between the first coating module and the second coating module. The cleaning module can be used to clean the dispenser bit 206 (see fig. 7).
In some examples, as shown in fig. 7, the cleaning module may include a bit cleaning groove 204 and a bit cleaning clip 205 disposed inside the bit cleaning groove 204 and configured to secure a dispensing bit 206. The bit cleaning clamp 205 sprays cleaning agent and dry air to the dispenser bit 206 to complete cleaning of the dispenser bit 206.
In some examples, the bit cleaning clip 205 may include a cleaning agent injection needle for injecting a cleaning agent, an air injection needle for injecting dry air, and a scraper clip. Therefore, the residual high-viscosity material of the distributing tool bit 206 can be better cleaned, and the cleaning agent is saved. However, the present embodiment is not limited thereto, and other spraying means may be used for spraying the cleaning agent or the dry air.
In some examples, a scraper clip may be provided at the front end of the cleaning agent injection needle. Before the cleaning agent is sprayed, the scraping clamp can be used for scraping the high-viscosity material accumulated on the material conveying opening of the distributing tool bit 206, so that the cleaning agent can be cleaned better, and the cleaning agent is saved.
Fig. 8 shows a schematic structural view of a supply module of the coating device 2 suitable for mass production of high-viscosity materials according to an example of the present disclosure. Fig. 9 shows a side view of a dispensing head 206 of a feeder module of a coating device 2 suitable for mass production of high viscosity material according to an example of the present disclosure. In some examples, the film coating apparatus 2 may include a supply module, as described above. The feeder module may be used to provide high viscosity material.
In some examples, as shown in fig. 7 or 8, the feed module may include a dispense head 206. The dispensing tip 206 may be used to output high viscosity materials. Specifically, the dispenser head 206 can output the high-viscosity material at a preset output rate while the first coating film area 200 or the second coating film area 207 is coated. The movement and rate of movement of the dispensing tip 206 on the first substrate 202 or the second substrate 210 is controlled by a control module (described later).
In some examples, the dispenser head 206 may include a material delivery opening that is arcuate or inverted triangular in shape. Thereby, accumulation of high viscosity material at the dispensing tip 206 can be reduced. Preferably, the feed opening is arc-shaped. In addition, compared with the inverted triangular material conveying opening, the arc-shaped material conveying opening can further avoid the adhesion of high-viscosity materials on two sides of the material conveying opening, so that the material accumulation problem of the distributing tool bit 206 is avoided, and the cleaning difficulty is reduced.
In some examples, as shown in fig. 9, the delivery port 2061 has an arc shape. When the dispenser blade 206 moves along the first base plate 202 at a predetermined speed and outputs the high-viscosity material 203 at a predetermined output rate, the dispenser blade 206 and the first base plate 202 maintain a suitable distance, and a contact point between the high-viscosity material 203 and the material delivery port 2061 does not exceed an arc-shaped area, thereby preventing the high-viscosity material 203 from being accumulated above the material delivery port 2061, reducing a cleaning operation to facilitate mass production of a coating film, and saving the high-viscosity material and a cleaning agent. In some examples, the size of the dispensing nozzle of the dispenser head 206 may be adjustable. The size of the material conveying opening can be determined according to the viscosity of the high-viscosity material and the requirement of a coating film pattern. Thereby, it can be helpful to control the dispensing or output rate of the high viscosity material on the first substrate 202 or the second substrate 210.
In some examples, the height of the dispenser head 206 to the first substrate 202 or the second substrate 210 may be adjusted by a height adjustment module (not shown) of the film coating device 2. This ensures that the delivery opening of dispenser tip 206 is maintained at a minimum height above first base plate 202 or second base plate 210, and does not contact the surface of first base plate 202 or second base plate 210.
In some examples, the distribution tool head 206 may be fixed below the air floating gantry (not shown) and move linearly with the air floating gantry. Wherein, the air-floating gantry device can comprise a height control mechanism. The height control mechanism in the air floating gantry apparatus precisely adjusts the height of the dispense head 206 through the gantry based on detected changes in the height of the first substrate 202 or the second substrate 210 relative to the dispense head 206. The height control mechanism may replace the height adjustment module of the film coating device 2.
In some examples, as shown in FIG. 8, the feed module may include a bit pressure monitor 501. A bit pressure monitor 501 may be provided at the dispense bit 206 and used to monitor dispense bit lumen pressure. The pressure value monitored by the bit pressure monitor 501 may be output to the control module.
In some examples, as shown in FIG. 8, the feed module may include a reservoir 505. Reservoir 505 may be used to store high viscosity materials. Reservoir 505 is in communication with dispensing bit 206 via a conduit.
In some examples, the high viscosity material may be one of PI paste, PAA paste, or UV glue. Thus, a PI film, a PAA film, or a UV film having higher uniformity can be obtained. The viscosity of the high viscosity material may be 5000cps or more. For example, the viscosity of the high viscosity material may be 5000-.
In some examples, as shown in fig. 8, the feed module may include a first feed pump 503. The first fluid supply pump 503 and the fluid reservoir 505 may be in communication via a plurality of lines. For example, the first fluid supply pump 503 and the fluid reservoir 505 communicate through two lines. The two lines may include a first line and a second line. Wherein the first fluid supply pump 503 acquires the high-viscosity material in the fluid reservoir 505 through the first pipeline. The first fluid supply pump 503 discharges air or a high-viscosity material to the reservoir tank 505 through the second pipe. However, the present example is not limited thereto, and the first fluid supply pump 503 and the fluid reservoir 505 communicate with each other through three or more lines. That is, the first fluid supply pump 503 may take the high-viscosity material in the fluid reservoir 505 through a plurality of pipes. The first fluid supply pump 503 may discharge air or high viscosity material to the fluid reservoir 505 through a plurality of lines.
In some examples, as shown in fig. 8, first fluid supply pump 503 is in communication with dispensing bit 206 via a conduit. Thus, the first fluid supply pump 503 can output the high viscosity material to the dispenser head 206 through the pipeline. In some examples, the first fluid supply pump 503 may be a diaphragm pump. The diaphragm pump can be precisely controlled. This enables the first liquid supply pump 503 to more accurately control the output of the high-viscosity material to the dispenser head 206.
In some examples, as shown in fig. 8, the feed module may include a first pump pressure monitor 504. First pump pressure monitor 504 may be disposed at first fluid supply pump 503 and used to monitor first fluid supply pump lumen pressure. The pressure value monitored by the first pump pressure monitor 504 may be output to the control module.
In some examples, as shown in fig. 8, the feed module may include a second feed pump 506. The second fluid supply pump 506 and the fluid reservoir 505 may be in communication via a plurality of lines. For example, the second fluid supply pump 506 communicates with the fluid reservoir tank 505 through two lines. The two lines may include a third line and a fourth line. Wherein the second liquid supply pump 506 acquires the high-viscosity material in the liquid storage tank 505 through the third pipeline. The second liquid supply pump 506 discharges air or a high-viscosity material to the liquid storage tank 505 through a fourth pipe. However, the present example is not limited thereto, and the second liquid supply pump 506 communicates with the liquid storage tank 505 through three or more lines. That is, the second liquid supply pump 506 can take in the high-viscosity material in the liquid storage tank 505 through a plurality of pipes. The second fluid supply pump 506 may discharge air or high viscosity material to the fluid reservoir 505 through a plurality of pipes.
In some examples, as shown in fig. 8, second fluid supply pump 506 is in communication with dispensing bit 206 via a conduit. Thus, second fluid supply pump 506 can deliver high viscosity material through the lines to dispensing bit 206. In some examples, the second fluid supply pump 506 may be a diaphragm pump. The diaphragm pump can be precisely controlled. This enables second liquid supply pump 506 to be controlled more accurately to supply the high-viscosity material to dispenser bit 206.
In some examples, as shown in fig. 8, the feed module may include a second pump pressure monitor 507. Second pump pressure monitor 507 may be disposed in second fluid supply pump 506 and used to monitor second fluid supply pump lumen pressure. The pressure value monitored by second pump pressure monitor 507 may be output to the control module.
In some examples, as shown in fig. 8, the feed module may include a first suction valve 511 and a second suction valve 508. The first suction valve 511 may be provided on a first line between the reservoir tank 505 and the first fluid supply pump 503. The first suction valve 511 may be used to control the on/off of the first line between the reservoir 505 and the first fluid supply pump 503. The first suction valve 511 receives a signal from the control module to perform an opening or closing operation. A second suction valve 508 may be provided on the third line between the reservoir 505 and the second feed pump 506. The second suction valve 508 may be used to control the connection/disconnection of the third pipeline between the liquid storage tank 505 and the second liquid supply pump 506. The second suction valve 508 receives a signal from the control module to perform an opening or closing operation.
In some examples, as shown in fig. 8, the feed module may include a first discharge valve 513 and a second discharge valve 510. First outlet valve 513 may be disposed on a second line between reservoir 505 and first fluid supply pump 503. First outlet valve 513 may be used to open or close a second line between reservoir 505 and first fluid supply pump 503. The first outlet valve 513 receives a signal from the control module to perform an opening or closing operation. A second outlet valve 510 may be disposed on a fourth line between reservoir 505 and second fluid supply pump 506. The second outlet valve 510 may be used to control the connection/disconnection of the fourth line between the reservoir 505 and the second fluid supply pump 506. The second outlet valve 510 receives a signal from the control module to perform an opening or closing operation.
In some examples, as shown in fig. 8, the feed module may include a first connection valve 512 and a second connection valve 509. A first connecting valve 512 may be provided between the first fluid supply pump 503 and the dispenser head 206. The first connection valve 512 can be used to open and close the line between the first fluid supply pump 503 and the dispenser head 206. A second connecting valve 509 may be provided between the second fluid supply pump 506 and the dispensing bit 206. A second connecting valve 509 may be used to control the connection between the second fluid supply pump 506 and the dispenser head 206.
In some examples, as shown in fig. 8, the feed module may include a control valve 514. A control valve 514 may be disposed between the reservoir 505 and the dispensing bit 206. The control valve 514 may be used to open and close the line between the dispensing bit 206 and the reservoir 505.
In some examples, the respective tubing diameters between reservoir 505, first fluid supply pump 503, second fluid supply pump 506, and dispensing bit 206 are equal. This makes it possible to avoid a change in pressure and speed when the high-viscosity material flows through the pipe, and thus to avoid an unstable coating state.
In some examples, the film coating apparatus 2 may include a control module, as described above. The control module may be used to control the movement of the dispense head 206 and the opening and closing of the various valves of the feed module.
In the existing film coating device 2, the control module is used for monitoring the pressure value of the first pump pressure monitor 504, the pressure value of the second pump pressure monitor 507 and the pressure value of the tool bit pressure monitor 501 in real time to avoid the phenomena of damage of the stability of the film coating state and backflow mixing of the high-viscosity materials.
In some examples, the control module may receive the pressure value of first pump pressure monitor 504, the pressure value of second pump pressure monitor 507, and the pressure value of head pressure monitor 501 and monitor fluctuations in the pressure value of first pump pressure monitor 504, fluctuations in the pressure value of second pump pressure monitor 507, and fluctuations in the pressure value of head pressure monitor 501.
In some examples, the control module may be configured to control opening and closing of the first suction valve 511, the first discharge valve 513, the first connection valve 512, the second suction valve 508, the second discharge valve 510, the second connection valve 509, and the control valve 514, and to control movement and movement rate of the dispense head 206 on the first substrate 202 or the second substrate 210 based on the pressure value of the first pump pressure monitor 504, the pressure value of the second pump pressure monitor 507, the pressure value of the head pressure monitor 501, the fluctuation of the pressure value of the first pump pressure monitor 504, the fluctuation of the pressure value of the second pump pressure monitor 507, and the fluctuation of the pressure value of the head pressure monitor 501.
Specifically, the control module opens the first suction valve 511 and the second suction valve 508 to keep the other valves closed until the first liquid supply pump 503 and the second liquid supply pump 506 finish feeding, after the feeding is finished, the control module opens the first discharge valve 513 and the second discharge valve 510 to close the other valves to discharge the gas in the first liquid supply pump 503 and the second liquid supply pump 506, after the gas is discharged, the control module closes the first discharge valve 513 and the second discharge valve 510 and controls the distribution head 206 to move above the first substrate 202 of the first coating module, then the first liquid supply pump 503 and the second liquid supply pump 506 perform slight material squeezing operation, if the pressure values of the first pump pressure monitor 504 and the second pump pressure monitor 507 reach the preset values, the control module opens the first connection valve 512 and the control valve 514, the pressure in the inner cavity of the distribution head gradually increases, if the pressure value of the head pressure monitor 501 reaches the preset value, the control module closes the control valve 514, the dispensing head 206 outputs the high-viscosity material at a preset output rate for coating, after the coating of the first coating module is completed, the pressure value of the first pump pressure monitor 504 and the pressure value of the head pressure monitor 501 are positive, and the first liquid supply pump 503 performs a slight suction operation until the pressure value of the first pump pressure monitor 504 is zero. Thereby, the backflow phenomenon of the high-viscosity material and the generation of fine bubbles can be avoided.
When the pressure value of the first pump pressure monitor 504 is zero, the control module closes the first connection valve 512, and moves the dispensing tool bit 206 to the position above the second substrate 210 of the second coating module, the control module opens the first suction valve 511 and the second connection valve 509, the first liquid feed pump 503 starts feeding, the second liquid feed pump 506 provides the high-viscosity material to the dispensing tool bit 206 at the preset output rate, so that the dispensing tool bit 206 outputs the high-viscosity material at the preset output rate for coating, during the process of providing the high-viscosity material by the second liquid feed pump 506, the first liquid feed pump 503 performs a slight extrusion operation after feeding is completed, and if the pressure value of the first pump pressure monitor 504 reaches the preset value, the first liquid feed pump 503 stops the slight extrusion operation and waits for the dispensing tool bit 206 to complete coating. Therefore, the pressure fluctuation inside the distributing cutter head caused by the negative pressure inside the first liquid supply pump 503 can be avoided, the stable coating state can be damaged, the pre-coating time can be reduced, the discharge amount of the high-viscosity material in the pre-coating process can be reduced, and the high-viscosity material can be saved. Wherein the preset value is set in relation to the high viscosity material.
After the coating of the second coating module is completed, the pressure value of the second pump pressure monitor 507 and the pressure value of the tool bit pressure monitor 501 are positive, the second liquid supply pump 506 performs a slight material suction operation until the pressure value of the second pump pressure monitor 507 is zero, the control module closes the second connection valve 509 and moves the dispensing tool bit 206 above the first base plate 202 of the first coating module, the control module opens the first connection valve 512 and the second material suction valve 508, the second liquid supply pump 506 starts feeding, the first liquid supply pump 503 supplies the high viscosity material to the dispensing tool bit 206 at a preset output rate so that the dispensing tool bit 206 outputs the high viscosity material at the preset output rate for coating, during the process of supplying the high viscosity material by the first liquid supply pump 503, the second liquid supply pump 506 performs a slight material extrusion operation after the feeding is completed, if the pressure value of the second pump pressure monitor 507 reaches a preset value, the second liquid supply pump 506 stops the slight material extrusion operation to wait for the dispensing tool bit 206 to complete the coating of the first coating module, and repeating the steps of the first coating module after the coating is finished. Thereby, the timing of switching of the dispenser head 206 between the first coating module and the second coating module can be determined by the control module based on the pressure value of the first pump pressure monitor 504, the pressure value of the second pump pressure monitor 507 and its fluctuation, and the pressure value of the head pressure monitor 501 and its fluctuation to ensure the stability of the state at the time of coating to improve the coating uniformity.
In some examples, a first difference between the pressure value of the first pump pressure monitor 504 and the pressure value of the tip pressure monitor 501 may be calculated during the first coating module filming or the second coating module filming. A second difference in the pressure value of second pump pressure monitor 507 and the pressure value of head pressure monitor 501. If the difference (first difference or second difference) is the pressure value of the pump pressure monitor (first pump pressure monitor 504 or second pump pressure monitor 507) minus the pressure value of head pressure monitor 501. If the difference value meets the preset difference value, the fluctuation of the pressure value of the pump pressure monitor is within the preset fluctuation range, the fluctuation of the pressure value of the cutter head pressure monitor 501 is within the preset fluctuation range, the preset difference value is a positive value, the numerical value is close to 0, the preset fluctuation range can meet the condition that the fluctuation of the pressure value at adjacent moments is close to 0, the film coating state is stable, and the uniformity of the coated film is high. In addition, the switching timing of the dispenser head 206 between the first coating module and the second coating module may be determined based on the first difference or the second difference to ensure the stability of the state at the time of coating to improve the coating uniformity.
In the present disclosure, the control module controls the movement and moving rate of the distributing head 206 of the feed module and controls the open and closed state of each valve of the feed module based on the pressure value of the first pump pressure monitor 504 and its fluctuation, the pressure value of the second pump pressure monitor 507 and its fluctuation, the pressure value of the head pressure monitor 501 and its fluctuation. This ensures the stability of the state of the coating film and improves the uniformity of the coating film. The cleaning module holds the dispenser bit 206 by the bit cleaning clamp 205 and sprays cleaning agent and dry air to the dispenser bit 206 to complete cleaning of the dispenser bit 206. This can reduce the amount of the cleaning agent used. The first coating module and the second coating module are used for coating, the pre-coating module is omitted, the utilization rate of high-viscosity materials can be improved, and the production efficiency of coating is improved.
In addition, in the present embodiment, the coating apparatus 2 may include a plurality of robot arms. The robot arm can be used to transport a substrate that has been coated and to place a substrate that has not been coated. Specifically, after the first coating module finishes coating, the first substrate 202 on which coating has been finished is transported by the robot arm, and the first substrate 202 on which coating has not been performed is placed, and after the second coating module finishes coating, the second substrate 210 on which coating has been finished is transported by the robot arm, and the second substrate 210 on which coating has not been performed is placed. This can improve the production efficiency of the coating film.
In the present embodiment, a coating method for a high-viscosity material suitable for mass production is disclosed, and the coating method is applied to the coating apparatus 2. Fig. 10 shows a flowchart of a coating method suitable for mass production of high viscosity materials according to an example of the present disclosure.
In the present embodiment, as shown in fig. 10, the coating method of a high viscosity material suitable for mass production may include a primary coating step (step S210), a switching coating step (step S220), a repeating coating step (step S230), and a washing step (step S240).
In step S210, the first coating step specifically includes: preparing high-viscosity materials, opening the first suction valve 511 and the second suction valve 508 to keep other valves closed, allowing the high-viscosity materials to enter the first liquid supply pump 503 and the second liquid supply pump 506, opening the first discharge valve 513 and the second discharge valve 510 to close other valves to discharge gas in the first liquid supply pump 503 and the second liquid supply pump 506 if the first liquid supply pump 503 and the second liquid supply pump 506 finish feeding, after the gas is discharged, the first discharge valve 513 and the second discharge valve 510 are closed and the dispensing tip 206 is controlled to move over the first substrate 202 of the first coating module, then, the first fluid supply pump 503 and the second fluid supply pump 506 perform a slight squeezing operation to make the pressure values of the first pump pressure monitor 504 and the second pump pressure monitor 507 reach a preset value, the first connection valve 512 and the control valve 514 are opened, if the pressure in the inner cavity of the dispensing head gradually increases to the preset value, the control valve 514 is closed, and the dispensing head 206 outputs the high-viscosity material at a preset output rate for coating.
In step S210, the high viscosity material is one of PI paste, PAA paste, or UV paste. Thereby, it is possible to perform coating using one of the PI paste, the PAA paste, or the UV paste to obtain a PI film, a PAA film, or a UV film having higher uniformity.
In step S220, the step of switching the coating specifically includes: after the coating film of the first coating module is completed, the pressure value of the first pump pressure monitor 504 and the pressure value of the head pressure monitor 501 are positive, the first liquid feed pump 503 performs a slight suction operation until the pressure value of the first pump pressure monitor 504 becomes zero, the first connection valve 512 is closed, and moves the dispenser head 206 above the second base plate 210 of the second coating module, opens the first suction valve 511 and the second connection valve 509, the first fluid feed pump 503 starts feeding, the second fluid feed pump 506 feeds the high-viscosity material to the dispenser head 206 at a preset output rate to allow the dispenser head 206 to output the high-viscosity material at the preset output rate for coating, in the process of supplying the high-viscosity material by the second liquid supply pump 506, the first liquid supply pump 503 performs a slight squeezing operation after the completion of the feeding, and if the pressure value of the first pump pressure monitor 504 reaches a preset value, the first liquid supply pump 503 stops the slight squeezing operation and waits for the completion of the coating by the dispenser head 206.
In step S230, the repeating coating step specifically includes: after the coating of the second coating module is completed, the pressure value of the second pump pressure monitor 507 and the pressure value of the cutter head pressure monitor 501 are positive, the second liquid supply pump 506 performs a slight material suction operation until the pressure value of the second pump pressure monitor 507 is zero, the second connection valve 509 is closed, the dispensing cutter head 206 is moved to above the first base plate 202 of the first coating module, the first connection valve 512 and the second suction valve 508 are opened, the second liquid supply pump 506 starts feeding, the first liquid supply pump 503 supplies the high viscosity material to the dispensing cutter head 206 at a preset output rate so that the dispensing cutter head 206 outputs the high viscosity material at the preset output rate for coating, during the process of supplying the high viscosity material by the first liquid supply pump 503, the second liquid supply pump 506 performs a slight material extrusion operation after the feeding is completed, if the pressure value of the second pump pressure monitor 507 reaches a preset value, the second liquid supply pump 506 stops the slight material extrusion operation to wait for the dispensing cutter head 206 to complete the coating of the first coating module, and repeats step S220 and step S230.
Wherein the time interval from the completion of the coating film of the second coating module to the start of the coating film of the first coating module or the time interval from the completion of the coating film of the first coating module to the start of the coating film of the second coating module is the dwell time. The residence time is related to the properties of the high viscosity material.
In step S240, the cleaning step specifically includes: after the first coating module completes the coating a predetermined number of times, the dispenser head 206 is cleaned. Wherein the preset times are related to the viscosity, the solubility and the solvent volatility of the high-viscosity material.
In addition, in step S240, when the dispenser head 206 is cleaned, the conventional cleaning agent purging process cannot rapidly dissolve the high-viscosity material, and a large amount of cleaning agent needs to be used for cleaning, so that the cleaning agent is wasted and the process time is increased, in step S240 of the present embodiment, cleaning the dispenser head 206 may include the dispenser head 206 entering the head cleaning groove 204, the head cleaning clip 205 clamping the lower edge of the dispenser head 206 and moving from the left edge of the dispenser head 206 to the right edge of the dispenser head 206, and simultaneously spraying the cleaning agent and spraying dry air to the dispenser head 206 to complete cleaning of the dispenser head 206. Therefore, the high-viscosity material residue can be quickly cleaned, and the high-viscosity material can be conveniently cleaned and recovered.
In the film coating method of the present disclosure, the movement and moving rate of the distributing head 206 and the open-close state of each valve are controlled based on the pressure value of the first pump pressure monitor 504 and its fluctuation, the pressure value of the second pump pressure monitor 507 and its fluctuation, the pressure value of the head pressure monitor 501 and its fluctuation. Therefore, the backflow phenomenon of the high-viscosity material and the generation of air bubbles can be avoided, the stability of the state during film coating is ensured, the uniformity of the film coating is improved, the utilization rate of the high-viscosity material can be improved based on the alternate film coating of the first coating module and the second coating module, and the production efficiency of the film coating is improved. In addition, in the coating method of the present embodiment, since the precoating operation is reduced, waste of about 5% of the high-viscosity material can be avoided to improve the material utilization rate, the cleaning agent required for the precoating operation can be saved, and the process cost and the process time can be saved. In addition, the coating film of the previous substrate can be regarded as a pre-coating treatment of the coating film of the current substrate, so that a good coating effect can be obtained, and materials can be saved.
In the feeding module of the coating apparatus 1 or 2 of the present disclosure, a closed cycle is formed of the high-viscosity material. In this case, it is helpful to control the stability of the high-viscosity material, such as the stability of the temperature, viscosity, purity, and the like, and it is possible to prevent the occurrence of, for example, bacterial growth caused by stagnation of the high-viscosity material. When the distribution cutter head is used for coating, the circulation can be controlled to stop or start according to specific requirements.
In the coating method of the present disclosure, the preset process variables or parameters may be kept constant. Such as the dispensing tip travel speed, dwell time, temperature of the base plate and high viscosity material, fluid supply pump internal pressure, and dispensing tip internal pressure. And under the condition that the preset process variable or parameter is not changed, other process parameters are changed, and the film product meeting the requirements can be produced. Other process parameters may be, for example, the chemical solids content and chemical properties of the high-viscosity material, the purity of the cleaning liquid, the substrate material properties.
While the present disclosure has been described in detail above with reference to the drawings and the embodiments, it should be understood that the above description does not limit the present disclosure in any way. Those skilled in the art can make modifications and variations to the present disclosure as needed without departing from the true spirit and scope of the disclosure, which fall within the scope of the disclosure.

Claims (6)

1. The utility model provides an improve high viscosity material utilization rate's coating device which characterized in that, the coating device includes feed module, first coating module, second coating module and control module, wherein:
the feed module comprises a distribution tool bit for outputting high-viscosity materials, a plurality of valves and a plurality of pressure monitors, the feed module comprises a distribution tool bit for outputting the high-viscosity materials, a tool bit pressure monitor for monitoring the pressure in an inner cavity of the distribution tool bit, a liquid storage tank for storing the high-viscosity materials, a first liquid supply pump, a first pump pressure monitor for monitoring the pressure in an inner cavity of the first liquid supply pump, a second pump pressure monitor for monitoring the pressure in an inner cavity of the second liquid supply pump, a first suction valve for controlling the on-off of a first pipeline between the liquid storage tank and the first liquid supply pump, a first discharge valve for controlling the on-off of a second pipeline between the liquid storage tank and the first liquid supply pump, and a second suction valve for controlling the on-off of a third pipeline between the liquid storage tank and the second liquid supply pump, The second discharge valve is used for controlling the on-off of a fourth pipeline between the liquid storage tank and the second liquid supply pump, the first connecting valve is used for controlling the on-off of a pipeline between the first liquid supply pump and the distributing tool bit, the second connecting valve is used for controlling the on-off of a pipeline between the second liquid supply pump and the distributing tool bit, and the control valve is used for controlling the on-off of a pipeline between the distributing tool bit and the liquid storage tank;
the first coating module comprises a first substrate bearing platform and a first substrate arranged on the first substrate bearing platform, and the first substrate is used for bearing the high-viscosity material output by the distribution tool bit;
the second coating module comprises a second substrate bearing platform and a second substrate arranged on the second substrate bearing platform, and the second substrate is used for bearing the high-viscosity material output by the distribution tool bit;
the control module is configured to control the movement and the movement rate of the dispenser head based on the pressure values of the plurality of pressure monitors and the fluctuations thereof, and to control the opening and closing of the plurality of valves, and the control module is configured to control the opening and closing of the first suction valve, the first discharge valve, the first connection valve, the second suction valve, the second discharge valve, the second connection valve, and the control valve, and to control the movement and the movement rate of the dispenser head based on the pressure values of the first pump pressure monitor, the second pump pressure monitor, the pressure value of the head pressure monitor, the fluctuations of the pressure value of the first pump pressure monitor, the fluctuations of the pressure value of the second pump pressure monitor, and the fluctuations of the pressure value of the head pressure monitor; the control module opens the first suction valve and the second suction valve to keep other valves closed until the first liquid supply pump and the second liquid supply pump finish feeding, after the feeding is finished, the control module opens the first discharge valve and the second discharge valve to close other valves to discharge gas in the first liquid supply pump and the second liquid supply pump, after the gas is discharged, the control module closes the first discharge valve and the second discharge valve and controls the distribution cutter head to move above the first substrate of the first coating module, then the first liquid supply pump and the second liquid supply pump perform slight extrusion operation, if the pressure values of the first pump pressure monitor and the second pump pressure monitor reach preset values, the control module opens the first connecting valve and the control valve, the pressure in the inner cavity of the distribution cutter head gradually increases, and if the pressure value of the cutter head pressure monitor reaches the preset value, the control module closes the control valve, the distribution cutter head outputs the high-viscosity material at a preset output speed for coating, after the coating of the first coating module is finished, the pressure value of the first pump pressure monitor and the pressure value of the cutter head pressure monitor are positive, and the first liquid supply pump slightly sucks the material until the pressure value of the first pump pressure monitor is zero; when the pressure value of the first pump pressure monitor is zero, the control module closes the first connecting valve and moves the distributing tool bit to the position above the second base plate of the second coating module, the control module opens the first suction valve and the second connecting valve, the first liquid supply pump starts to feed, the second liquid supply pump provides the high-viscosity material to the distributing tool bit at a preset output rate so that the distributing tool bit outputs the high-viscosity material at the preset output rate for coating, in the process of providing the high-viscosity material by the second liquid supply pump, the first liquid supply pump performs slight extrusion operation after feeding is completed, and if the pressure value of the first pump pressure monitor reaches a preset value, the first liquid supply pump stops the slight extrusion operation and waits for the distributing tool bit to complete coating.
2. The coating apparatus according to claim 1, further comprising a cleaning module including a tool bit cleaning tank and a tool bit cleaning clip provided inside the tool bit cleaning tank and used for fixing the dispensing tool bit, wherein the tool bit cleaning clip includes a cleaning agent injection needle for injecting a cleaning agent, an air injection needle for injecting dry air, and a scraping clip which scrapes off the high viscosity material on the delivery port of the dispensing tool bit before injecting the cleaning agent.
3. The film coating apparatus according to claim 1, wherein diameters of respective lines between the reservoir, the first fluid supply pump, the second fluid supply pump, and the dispensing head are equal.
4. The coating apparatus according to claim 1, wherein after the coating of the second coating module is completed, a pressure value of the second pump pressure monitor and a pressure value of the head pressure monitor are positive, the second liquid supply pump performs a slight suction operation until the pressure value of the second pump pressure monitor is zero, the control module closes the second connection valve and moves the dispenser head above the first base plate of the first coating module, the control module opens the first connection valve and the second suction valve, the second liquid supply pump starts feeding, the first liquid supply pump supplies the high viscosity material to the dispenser head at a preset output rate so that the dispenser head outputs the high viscosity material at the preset output rate for coating, and during the supply of the high viscosity material by the first liquid supply pump, and if the pressure value of the second pump pressure monitor reaches a preset value, the second liquid feed pump stops the slight extrusion operation to wait for the distributing tool bit to finish the film coating of the first coating module, and the step of finishing the film coating of the first coating module is repeated.
5. The film coating apparatus of claim 1, wherein the height of the dispenser head to the first substrate or the second substrate is adjusted by a height adjustment module of the film coating apparatus.
6. The coating apparatus according to claim 5, wherein the dispenser head is fixed below an air floating gantry device and moves linearly with the air floating gantry device, wherein the air floating gantry device comprises a height control mechanism for adjusting the height of the dispenser head by a change in the height of the first substrate or the second substrate relative to the dispenser head detected by the air floating gantry device.
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CN113546812B (en) 2022-08-09
CN111687003B (en) 2021-09-14

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