Dispensing valve device capable of automatically cleaning fluid piezoelectric and electromagnetic valves

Abstract

The utility model provides a dispensing valve device for automatically cleaning a fluid piezoelectric and electromagnetic valve. The dispensing valve device comprises a cleaning controller, a digital-electric adapter, a dispensing machine equipment body, a piezoelectric valve, a cleaning assembly, a cleaning solvent pressure barrel and a waste glue collector, the cleaning controller is electrically connected with the equipment body and the piezoelectric valve through adapters, and is communicated with the power supply, the air source and the pressure barrel; the pressure barrel conveys cleaning solvent to the piezoelectric valve flow channel and the nozzle through the solvent switch, and waste glue is discharged into the collector, the cleaning cloth belt, the motor and the optical fiber sensor through the nozzle and used for wiping and cleaning the outer surface of the nozzle and detecting the outer surface in place. The device for automatically cleaning the fluid piezoelectric dispensing valve provided by the utility model not only solves various problems in the traditional manual cleaning mode, but also brings more efficient, stable and environment-friendly use experience for users.

Description

TECHNICAL FIELD

[0001] The utility model relates to automatic fluid point gum equipment technical field, concretely relates to a kind of point gum valve devices of automatic cleaning fluid piezoelectric and electromagnetic valve. BACKGROUND

[0002] Fluid point gum equipment has wide application in electronic, medical, automobile manufacturing and multiple industries, and one of its core components is point gum valve;Traditional point gum valve mostly uses piezoelectric ceramic or pneumatic electromagnetic valve as driving source, for accurately controlling the injection of fluid;However, with the increase of use time, the internal flow passage and nozzle of point gum valve are prone to blockage due to residual glue solidification, affecting the point gum precision and quality;Therefore, regular cleaning and maintenance is an indispensable part to ensure the normal operation of point gum equipment.

[0003] Disadvantages of prior art:

[0004] 1. Artificial disassembly point gum valve cleaning is time-consuming and laborious: at present, most point gum valves need to be disassembled manually and taken to special cleaning stations for disassembly and cleaning. This process is not only complex but also consumes a lot of time and human resources.

[0005] 2. Cleaning effect is unstable: due to dependence on manual operation, there is a problem of incomplete cleaning, which may cause uneven cleaning effect due to human factors, affecting the point gum quality.

[0006] 3. Additional cost is increased: in addition to labor cost, special cleaning room and station, as well as various cleaning tools and materials (such as brush, cotton cloth, etc.) are needed, which increases operating cost.

[0007] 4. Production efficiency is affected: each disassembly will cause change of machine position accuracy, which needs to be re-calibrated, further prolonging non-production time and reducing overall production efficiency.

[0008] 5. Environmental problem: traditional method produces more waste, which will pollute the environment if not properly treated.

[0009] Therefore, the prior art has disadvantages and needs to be further improved. Utility model content

[0010] In view of the problems existing in the prior art, the utility model provides a kind of point gum valve devices of automatic cleaning fluid piezoelectric and electromagnetic valve.

[0011] To achieve the above purpose, the specific scheme of the utility model is as follows:

[0012] The utility model provides a kind of point gum valve devices of automatic cleaning fluid piezoelectric and electromagnetic valve, comprising:

[0013] The cleaning controller, the digital electrical adapter, the machine body, the piezoelectric valve, the cleaning assembly, the cleaning solvent pressure barrel, and the waste glue collector.

[0014] The cleaning controller is electrically connected with the adapter, and the adapter is electrically connected with the machine body and the piezoelectric valve.

[0015] The cleaning controller is further connected with a power supply and a gas source, and the cleaning controller is further connected with the cleaning solvent pressure barrel, and the cleaning solvent pressure barrel is connected with the machine body.

[0016] The cleaning controller is used for inputting the gas to press the cleaning solvent in the cleaning solvent pressure barrel to the machine body, so as to clean the dispensing valve flow channel and the nozzle of the machine body, and the waste glue after cleaning is discharged and flows into the waste glue collector.

[0017] The cleaning controller is further used for inputting the gas to the machine body, so as to clean the flow channel and the nozzle of the dispensing valve.

[0018] The cleaning assembly is arranged in the machine body, and the cleaning assembly is provided with a cleaning cloth belt used for cleaning the nozzle.

[0019] Further, a solvent switch is further arranged between the cleaning solvent pressure barrel and the machine body.

[0020] Further, the cleaning assembly comprises a mounting seat, a cloth belt wheel, a cleaning cloth belt, an alcohol peristaltic pump, a motor, a driving wheel, a transmission wheel, a circuit control board, and a protective cover plate.

[0021] The mounting seat is provided with a cleaning solvent groove, and two cloth belt wheels are arranged in the cleaning solvent groove, and the cleaning cloth belt is arranged on the two cloth belt wheels.

[0022] The protective cover plate is bent at a right angle, and an upper end of the protective cover plate is arranged on the mounting seat.

[0023] Two fixing columns are further arranged on a side wall of the mounting seat, the motor is arranged on the two fixing columns, and two fixing rods are further arranged between the motor and a lower end of the protective cover plate.

[0024] A driving wheel is arranged on a rotating shaft of the motor, two cloth belt wheels are connected with two transmission wheels through synchronous shafts, and the driving wheel is in transmission connection with the transmission wheel.

[0025] The motor drives the transmission wheel to rotate through the driving wheel, and then drives the cloth belt wheel to rotate, and then drives the cleaning cloth belt to rotate, and the cleaning cloth belt is used for cleaning the nozzle or the needle nozzle.

[0026] A solvent input pipe and a solvent output pipe are further arranged on a side wall of the cleaning solvent groove, the alcohol peristaltic pump is connected with the solvent input pipe, and the alcohol peristaltic pump is used for injecting alcohol into the cleaning solvent groove.

[0027] Further, the cleaning assembly further comprises a control circuit board, which is installed inside the protective cover plate.

[0028] The control circuit board is electrically connected with the alcohol peristaltic pump and the motor respectively.

[0029] The side of the mounting seat is further provided with an optical fiber sensor, which is electrically connected with the control circuit board and used for sensing whether the nozzle or the needle nozzle reaches the set position.

[0030] Further, the control circuit board is further provided with an MCU micro control unit, an input isolation integrated optical coupling module, a 5V voltage stabilizer and an output drive integrated transistor module.

[0031] The MCU micro control unit is connected with the input isolation integrated optical coupling module, the 5V voltage stabilizer and the output drive integrated transistor module respectively.

[0032] The input isolation integrated optical coupling module is connected with the optical fiber sensor.

[0033] The output drive integrated transistor module is connected with the alcohol peristaltic pump and the motor respectively.

[0034] Further, the output drive integrated transistor module is further connected with a decoding drive chip.

[0035] The decoding drive chip is connected with a three-digit nixie tube and a timing setting button respectively, the timing setting button is used for setting the time of the alcohol peristaltic pump for delayed feeding, and the three-digit nixie tube is used for displaying the time of the delayed feeding.

[0036] Further, the installation position of the solvent input pipe on the side wall of the cleaning solvent tank is lower than that of the solvent output pipe, so as to discharge the excess solvent and waste glue.

[0037] The technical scheme of the utility model has the following beneficial effects:

[0038] 1. Improve the cleaning efficiency and quality

[0039] Automatic cleaning: the cleaning controller can automatically control the input of the solvent and the gas according to the preset parameters, so as to ensure the consistency and thoroughness of each cleaning process.

[0040] Dual-mode cleaning: wet cleaning (solvent flushing) and dry cleaning (gas blowing) are provided, which can effectively remove the residues in the flow channel and the nozzle of the dispensing valve and ensure the dispensing precision and quality.

[0041] 2. Reduce manual intervention

[0042] No need to disassemble: the dispensing valve can be cleaned without disassembly, so as to avoid the change of the position precision caused by disassembly and reduce the time for re-correction.

[0043] Reduced labor intensity: Automated cleaning process greatly reduces the workload of operators, improving work efficiency.

[0044] 3. Time and cost savings

[0045] Quick recovery of production: After cleaning, it can be immediately put into use, shortening the non-production time and improving the overall production efficiency.

[0046] Reduced operating costs: Reduced demand for professional cleaning sites, tools and materials, reducing labor and material costs.

[0047] 4. Enhanced environmental performance

[0048] Waste collection: Equipped with a waste rubber collector, it facilitates the centralized treatment of waste and reduces environmental pollution.

[0049] Optimized resource utilization: By precisely controlling the amount of solvent and gas used, unnecessary resource waste is reduced.

[0050] 5. Intelligent management and monitoring

[0051] Intelligent control system: Built-in MCU micro control unit, realizing parameter setting, state monitoring and other functions, simplifying the operation process.

[0052] Real-time feedback mechanism: Optical fiber sensor can detect nozzle position to ensure accurate cleaning process; three-digit nixie tube and timing setting button provide an intuitive operation interface for users to set the delay feeding time.

[0053] 6. Improved user experience

[0054] Visual adjustment: Visual parameter adjustment of the display screen is achieved through components on the control circuit board, allowing users to easily set according to actual conditions.

[0055] Easy maintenance: The entire system is designed compactly and modularly, facilitating daily maintenance and technical support.

[0056] 7. Maintain position accuracy consistency

[0057] No need to recalibrate: Since the cleaning process does not involve disassembly of the glue valve, the position accuracy consistency is maintained, ensuring the continuity and stability of production. BRIEF DESCRIPTION OF DRAWINGS

[0058] Figure 1 is the overall structure schematic diagram of the utility model;

[0059] Figure 2 is a perspective view of the cleaning controller of the utility model;

[0060] Figure 3 is a perspective view of the adapter of the utility model;

[0061] Figure 4 is a perspective view of the cleaning assembly of the utility model;

[0062] Figure 5 is an exploded view of the cleaning assembly of the utility model;

[0063] Figure 6 is an electrical connection relationship diagram of the cleaning assembly of the utility model;

[0064] In the figure,

[0065] 1, mounting seat, 2, cloth belt wheel, 3, cleaning cloth, 4, alcohol peristaltic pump, 5, motor, 6, driving wheel, 7, transmission wheel, 8, protective cover plate, 9, cleaning solvent tank, 10, fixed column, 11, fixed rod, 12, synchronous shaft, 13, solvent input pipe, 14, solvent output pipe, 15, control circuit board, 16, optical fiber sensor, 17, MCU micro control unit, 18, input isolation integrated optical coupling module, 19, 5V stabilizer, 20, output drive integrated transistor module, 21, decoding drive chip, 22, three-digit nixie tube, 23, timing setting button, 24, leak-proof gasket, 25, cleaning controller, 26, adapter, 27, machine body, 28, piezoelectric valve, 29, cleaning assembly, 30, cleaning solvent pressure barrel, 31, waste rubber collector, 32, switch. DETAILED DESCRIPTION

[0066] The utility model will be further explained in detail below in combination with the drawings and examples.It can be understood that the specific examples described here are only used to explain the utility model, and not limited to the utility model.In addition, it should be noted that in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all the structures.

[0067] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0068] In the utility model, unless another definite provision and limitation, first feature is on the "upper" or "lower" of second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other features between them.Moreover, first feature on the "upper", "upper side" and "upper surface" of second feature includes that first feature is directly above and obliquely above second feature, or only indicates that the horizontal height of first feature is higher than second feature.The "lower", "lower side" and "under surface" of first feature on second feature includes that first feature is directly below and obliquely below second feature, or only indicates that the horizontal height of first feature is less than second feature.

[0069] In the description of the embodiment, the orientation or position relationship of the terms "upper", "lower", "front", "back", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0070] In combination Figures 1-6 As shown in the utility model provides a kind of point glue valve device of automatic cleaning fluid piezoelectric and electromagnetic valve, comprising: cleaning controller 25, adapter 26, machine body 27, piezoelectric valve 28, cleaning assembly 29, cleaning solvent pressure barrel 30, waste glue collector 31;

[0071] The cleaning controller 25 is electrically connected with the adapter 26, and the adapter 26 is electrically connected with the machine body 27 and the piezoelectric valve 28;

[0072] The cleaning controller 25 is also connected with a power supply and an air source, and the cleaning controller 25 is also connected with the cleaning solvent pressure barrel 30, and the cleaning solvent pressure barrel 30 is connected with the machine body 27;

[0073] The cleaning controller 25 is used for inputting gas to extrude the cleaning solvent in the cleaning solvent pressure barrel 30 to the machine body 27, for cleaning the flow channel and nozzle of the machine body 27, and the waste glue after cleaning is discharged and flows into the waste glue collector 31;

[0074] The cleaning controller 25 is also used for inputting gas to the machine body 27, for cleaning the flow channel and nozzle by gas;

[0075] The cleaning assembly 29 is arranged in the machine body 27, and the cleaning assembly 29 is provided with a cleaning cloth belt 3 for cleaning the nozzle.

[0076] The cleaning solvent pressure barrel 30 and the machine body 27 are also provided with a switch 32.

[0077] The cleaning assembly 29 comprises a mounting base 1, a cloth belt wheel 2, a cleaning cloth belt 3, an alcohol peristaltic pump 4, a motor 5, a driving wheel 6, a transmission wheel 7, a protective cover plate 8;

[0078] The mounting base 1 is provided with a cleaning solvent tank 9, and two cloth belt wheels 2 are arranged in the cleaning solvent tank 9, and the cleaning cloth belt 3 is arranged on the two cloth belt wheels 2;

[0079] The protective cover plate 8 is bent at a right angle, and the upper end of the protective cover plate 8 is arranged on the mounting base 1;

[0080] Two fixing columns 10 are further arranged on the side wall of the mounting base 1, the motor 5 is arranged on the two fixing columns 10, and two fixing rods 11 are further arranged between the motor 5 and the lower end of the protective cover plate 8;

[0081] The driving wheel 6 is arranged on the rotating shaft of the motor 5, the two cloth belt wheels 2 are connected with the two transmission wheels 7 through a synchronous shaft 12, and the driving wheel 6 is in transmission connection with the transmission wheel 7;

[0082] The motor 5 drives the transmission wheel 7 to rotate through the driving wheel 6, and then drives the cloth belt wheel 2 to rotate, and then drives the cleaning cloth belt 3 to rotate, and the cleaning cloth belt 3 is used for cleaning the nozzle or the needle nozzle;

[0083] The side wall of the cleaning solvent tank 9 is further provided with a solvent input pipe 13 and a solvent output pipe 14, the alcohol peristaltic pump 4 is connected with the solvent input pipe 13, and is used for injecting alcohol into the cleaning solvent tank 9.

[0084] The cleaning assembly 29 further comprises a control circuit board 15, and the control circuit board 15 is arranged on the inner side of the protective cover plate 8;

[0085] The control circuit board 15 is in electrical connection with the alcohol peristaltic pump 4 and the motor 5 respectively;

[0086] The side of the mounting base 1 is further provided with an optical fiber sensor 16, the optical fiber sensor 16 is in electrical connection with the control circuit board 15, and is used for sensing whether the nozzle or the needle nozzle reaches a set position.

[0087] The control circuit board 15 is further provided with an MCU micro control unit 17, an input isolation integrated optical coupling module 18, a 5V stabilizer 19 and an output drive integrated transistor module 20;

[0088] The MCU micro control unit 17 is connected with the input isolation integrated optical coupling module 18, the 5V stabilizer 19 and the output drive integrated transistor module 20 respectively;

[0089] The input isolation integrated optical coupling module 18 is connected with the optical fiber sensor 16;

[0090] The output drive integrated transistor module 20 is connected with the alcohol peristaltic pump 4 and the motor 5 respectively.

[0091] The output drive integrated transistor module 20 is also connected with a decoding drive chip 21.

[0092] The decoding drive chip 21 is connected with a three-digit nixie tube 22 and a timing setting button 23 respectively, the timing setting button 23 is used for setting the time of the delayed feeding of the alcohol peristaltic pump 4, and the three-digit nixie tube 22 is used for displaying the time of the delayed feeding.

[0093] The installation position of the solvent input pipe 13 on the side wall of the cleaning solvent tank 9 is lower than that of the solvent output pipe 14.

[0094] The utility model principle is as follows:

[0095] The utility model discloses an automatic cleaning fluid piezoelectric and electromagnetic valve's point glue valve device, and its working principle mainly realizes the automatic cleaning of point glue valve through cleaning controller 25, cleaning assembly 29 and relevant control system. The following is the detailed working procedure:

[0096] 1. Cleaning preparation stage

[0097] Power and gas source connection: the cleaning controller 25 is connected with power and gas source first, ensures that the whole cleaning process has stable power supply and gas pressure.

[0098] Initialization setting: the operator connects the cleaning solvent feed pipe joint to the feed pipe interface of point glue valve, and rotates the solvent delivery pipe opening and closing 32, and simultaneously presses the cleaning button to start the cleaning program.

[0099] 2. Solvent cleaning (wet cleaning mode)

[0100] Solvent input control: the cleaning controller 25 enters the solvent in the machine body point glue valve 27 according to the set parameter through the gas pressure drive cleaning solvent pressure barrel 30.The solvent reaches the nozzle through the point glue valve flow channel, and the internal residual glue is washed in the mode of controlling the low frequency up and down movement of point glue valve.

[0101] Waste liquid collection: after cleaning, the solvent dissolved waste glue is discharged from the nozzle and flows into the waste glue collector 31 below to be uniformly treated.

[0102] 3. Gas cleaning (dry cleaning mode)

[0103] Gas input control: after wet cleaning, the operator replaces the gas supply pipe and opens the dry cleaning function of the cleaning controller 25. At this time, the cleaning controller 25 continuously provides adjustable gas pressure, so that the gas passes through the point glue valve flow channel and the nozzle, further removes the moisture or small particles that may be left inside, and ensures thorough drying and cleaning.

[0104] 4. Nozzle exterior cleaning

[0105] Cleaning cloth belt 3 operation: the motor 5 in the cleaning assembly 29 located on the side of the machine body 27 is started, the transmission wheel 7 is driven to rotate through the driving wheel 6, and then the cleaning cloth belt 3 installed on the two cloth belt wheels 2 is driven to rotate. The cleaning cloth belt 3 is used to wipe the outer surface of the nozzle to remove any attachments.

[0106] Alcohol auxiliary cleaning: if more thorough cleaning is required, the alcohol peristaltic pump 4 will inject an appropriate amount of alcohol into the cleaning solvent tank 9 to enhance the cleaning effect.

[0107] 5. Control system coordination

[0108] Intelligent control unit: the MCU micro control unit 17 as the core controller is responsible for receiving the position signal from the optical fiber sensor 16 and other input information, and issuing instructions to the output drive integrated transistor module 20 accordingly, so as to accurately control the actions of the motor 5 and the alcohol peristaltic pump 4.

[0109] User interaction interface: the three-digit nixie tube 22 displays the current delay feeding time and other parameters, and the timing setting button 23 allows the user to customize the delay feeding time of the alcohol peristaltic pump 4, realizing the function of human-computer interaction.

[0110] 6. Safety and efficiency guarantee

[0111] Switch 32 setting: a switch 32 is provided between the cleaning solvent pressure tank 30 and the machine body 27 to ensure the safety and effectiveness of the system during the cleaning process, preventing accidental leakage or other failures.

[0112] Solvent flow optimization: the position of the solvent input pipe 13 is lower than that of the solvent output pipe 14, which ensures that the solvent can flow smoothly into the cleaning solvent tank 9 and effectively prevents backflow.

[0113] In summary, the automatic cleaning fluid piezoelectric and electromagnetic valve dispensing valve device realizes efficient and thorough cleaning of the dispensing valve and related components through integrated hardware design and intelligent control system, greatly facilitates the daily maintenance work of the user, and improves the production efficiency and product quality.

[0114] The above only describes the preferred embodiments of the present application, and does not limit the scope of the application. Any equivalent structural transformation made by using the contents of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the protection scope of the present application.

Claims

1. A dispensing valve device for an automatic cleaning fluid piezoelectric and solenoid valve, characterized in that, include: Cleaning controller, digital-to-digital adapter, dispensing machine body, piezoelectric valve, cleaning components, cleaning solvent pressure tank, waste adhesive collector; The cleaning controller is electrically connected to the adapter, and the adapter is electrically connected to the dispensing machine body and the piezoelectric valve. The cleaning controller is also connected to a power source and an air source, and is also connected to a cleaning solvent pressure tank, which is connected to the dispensing machine body. The cleaning controller is used to input gas to squeeze the cleaning solvent in the cleaning solvent pressure tank into the machine body, and to clean the flow channel and nozzle of the dispensing valve of the machine body. After cleaning, the cleaning and dissolved waste glue is discharged and flows into the waste glue collector. The cleaning controller is also used to input gas into the machine body to clean the dispensing valve channel and nozzle through the gas; The cleaning assembly is located inside the machine body and is equipped with a cleaning cloth for cleaning the nozzles.

2. The dispensing valve device for automatic cleaning fluid piezoelectric and solenoid valves according to claim 1, characterized in that, A solvent switch is also installed between the cleaning solvent pressure tank and the machine body.

3. The dispensing valve device for automatic cleaning fluid piezoelectric and solenoid valves according to claim 1, characterized in that, The cleaning assembly includes a mounting base, a belt pulley, a cleaning belt, an alcohol peristaltic pump, a motor, a drive wheel, a transmission wheel, a circuit control board, and a protective cover. The mounting base is provided with a cleaning solvent tank, and two cloth belt pulleys are set in the cleaning solvent tank. The cleaning cloth belt is installed on the two cloth belt pulleys. The protective cover is bent at a right angle, and its upper end is mounted on the mounting base; Two fixing columns are also installed on the side wall of the mounting base, the motor is installed on these two fixing columns, and two fixing rods are also provided between the motor and the lower end of the protective cover plate. The motor has a drive wheel mounted on its shaft, and two belt pulleys are connected to two transmission pulleys via a synchronous shaft. The drive wheel and the transmission pulleys are connected in a driving connection. The motor drives the transmission wheel to rotate via the drive wheel, which in turn drives the belt pulley to rotate, which in turn drives the cleaning belt to rotate. The cleaning belt is used to clean the nozzle or needle tip. The cleaning solvent tank is also equipped with a solvent inlet pipe and a solvent outlet pipe on its side wall. An alcohol peristaltic pump is connected to the solvent inlet pipe and is used to inject alcohol into the cleaning solvent tank.

4. The dispensing valve device for automatic cleaning fluid piezoelectric and solenoid valves according to claim 3, characterized in that, The cleaning assembly also includes a control circuit board, which is installed inside the protective cover. The control circuit board is electrically connected to the alcohol peristaltic pump motor. The mounting base is also equipped with a fiber optic sensor on its side. The fiber optic sensor is electrically connected to the control circuit board and is used to sense whether the nozzle or needle tip has reached the set position.

5. The dispensing valve device for automatic cleaning fluid piezoelectric and solenoid valves according to claim 4, characterized in that, The control circuit board is also equipped with an MCU microcontroller unit, an input isolation integrated optocoupler module, a 5V voltage regulator, and an output driver integrated transistor module. The MCU microcontroller unit is connected to the input isolation integrated optocoupler module, the 5V voltage regulator, and the output driver integrated transistor module, respectively. The input isolation integrated optical coupler module is connected to the fiber optic sensor; The output drive integrated transistor module is connected to the alcohol peristaltic pump and the motor, respectively.

6. The dispensing valve device for automatic cleaning fluid piezoelectric and solenoid valves according to claim 5, characterized in that, The output driver integrated transistor module is also connected to a decoder driver chip; The decoding driver chip is connected to a three-digit LED display and a timer setting button. The timer setting button is used to set the time for delayed feeding of the alcohol peristaltic pump, and the three-digit LED display is used to display the time for delayed feeding.

7. The dispensing valve device for automatic cleaning fluid piezoelectric and solenoid valves according to claim 3, characterized in that, The solvent inlet pipe is installed on the side wall of the cleaning solvent tank at a position lower than the solvent outlet pipe, and is used to discharge excess solvent and waste glue.

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