JP4863389B2 - Cleaning device and cleaning unit including the cleaning device - Google Patents

Description

  The present invention relates to a cleaning apparatus capable of realizing management and replenishment capable of considering profitability in addition to various performances such as cleaning performance in a production line including a pretreatment process, and a cleaning unit including the cleaning apparatus. More specifically, it improves the workability, productivity, and cleaning quality, which are particularly problematic with powder-type cleaning agents, and maintains various performances obtained with powder cleaning agents, or improves them more than before. For technology.

Metallic alkali detergents are most commonly used in the form of powders because of their importance in terms of cost, including costs such as product price, distribution and storage.
Even if such significance is taken into consideration, the problem that is difficult to solve as long as it is in the form of powder is a problem of workability and productivity, and it is a problem that must be solved even in consideration of social conventions.

  <Workability> Alkaline agent contained in large quantities as the main component causes significant damage to the skin mucous membrane of the worker by scattering into the air, and even if the worker takes sufficient defensive measures such as protective equipment. Due to the poor nature, handling is complicated, and it is impossible to deny the possibility of causing work-related accidents and variations in cleaning quality.

  <Productivity and cleaning quality> Common alkali metal hydroxides and alkali metal salts of silicic acid as alkali agents have high deliquescence, and when left in the air, they absorb moisture and cause aggregation of particles. Therefore, automatic replenishment with a hopper or feeder is difficult. Therefore, since it is finally possible to use it after dissolution after batch-type charging, the generation of yield during this time cannot be avoided. In some cases, in order to avoid this yield, in many cases, the operation is continued during the day while accepting the decrease in cleaning performance without replenishment, and replenishment is performed after the operation is completed.

  In response to such problems with powder alkaline detergents, efforts have been made to make the liquids more concentrated in order to liquefy the detergents and to supply them at a concentration suitable for the cost of distribution and the like. Has been made.

  In Patent Document 1, a cationic saccharide is used as a dispersion and crystallization preventing component for dissolving or dispersing an inorganic builder component such as silicate and phosphate and / or a surfactant in a sufficiently concentrated state, and In Patent Document 2, an ethylenically unsaturated organic monomer alone or a copolymer having a molecular weight within a certain range, or a salt thereof is blended as a dispersant.

In addition, in order to improve workability and productivity, investigations have been made to secure higher productivity by automating work that has previously relied on human resources and further establishing the method.
Patent Document 3 describes a method in which alkalinity is automatically measured under program control as a cleaning bath maintenance means, and a metering device is activated as required. Safety improvement by remote operation is also sought.

Patent Document 4 describes a cleaning concentration variable adjusting device and an optimization method for quickly reaching a set value without causing the detergent concentration to go too far from the set value. , Written as “Conductivity”).
Japanese Patent Laid-Open No. 6-184775 (2nd line on the right of the specification page 3) Japanese Patent Application Laid-Open No. 11-181587 (Description) Special table 2002-501119 Special table flat 7-504609

  However, liquid concentration technology for alkaline detergents as exemplified in Patent Document 1 and Patent Document 2 minimizes the increase in costs such as distribution, and the workability and production of conventional powder alkaline detergents. Although certain effects are recognized in improving the performance and cleaning quality, it is necessary to further improve workability from the necessity of handling concentrated alkali, and more automation techniques such as those in Patent Document 3 and Patent Document 4 are required. There is a need to realize a higher level of productivity that can be realized and have at least the cleaning performance obtained with conventional powder cleaning agents.

  The present invention seeks to solve the problems relating to workability, productivity and cleaning quality, which can be said to be harmful effects of the powder alkali detergent, without impairing the good performance obtained by the conventional powder alkali detergent. Is.

  In addition, since the replenisher used for the liquid alkaline detergent often has a high viscosity of the liquid from the viewpoint of reducing storage space and the like, trouble is more likely to occur during replenishment of the drug compared to other wet treatments. It is also an object to provide means for suppressing such troubles.

  Furthermore, the present invention adds a new idea of total management of a pretreatment process including degreasing to metal surface treatment such as plating, painting, and heat treatment, thereby improving workability, productivity, and cleaning quality. This effect is further enhanced. In the present invention, in addition to pursuing the above-mentioned performance, it is characterized by combining knowledge including profitability when this is applied to a production line, and embodying the most realistic line design Is possible.

  Here, “good performance obtained by conventional powder alkali cleaning agent” means, in consideration of environmental regulation problems such as biodegradability, in addition to general performance normally required for cleaning, such as cleaning performance, Even with the same detergency, there are concerns about the use of powder detergents, such as better biodegradability than liquid detergents with a high proportion of organic components added to prevent separation and crystallization. Includes the effectiveness of environmental impact factors that were not required.

The cleaning apparatus according to the present invention provided to solve the above problems has the following apparatus configurations (1) to (3).
(1) A cleaning apparatus that performs a cleaning process while supplying at least one type of liquid replenishment medicine to a cleaning liquid, and has a main tank section that has a cleaning liquid and cleans an object to be cleaned, and a main tank A pump unit that circulates the cleaning liquid by sucking and discharging a part of the cleaning liquid in the unit, a storage tank that accumulates the replenishing drug, and a replenishing device that replenishes the replenishing drug from the storage tank into the cleaning tank, A replenishment device for supplying a replenishment start signal and a replenishment stop signal, and the main tank unit includes a replenishment box for replenishing the cleaning liquid in the main tank unit with a replenishment drug. A first inflow part into which the replenishment medicine from the storage tank is poured, a second inflow part into which the cleaning liquid from the pump unit is poured, and a replenishment medicine poured from the first inflow part. The cleaning liquid poured from the inflow part It is interpreted and a both outflow portion which flows into the tank portion.

  Here, the “replenishment device” means a control power source for driving the pump and a control for directly controlling the operation of the pump in addition to a pump for transferring the medicine in the storage tank to the washing tank. A mechanism may be included. Thus, when the replenishing device has a control function, the control unit outputs a predetermined control signal for the control.

  The “replenishment start signal” is a signal necessary for the pump provided in the replenishing device to start or continue the operation of transferring the medicine in the storage tank to the cleaning tank, and is an intermittent signal. However, it may be a continuous signal. For example, when the pump is driven by a stepping motor, it may be a pulse voltage that directly drives the motor, or a control signal that instructs the start of output of a control power source that outputs this pulse voltage. In the case where a replenishing device is provided with some control mechanism and replenishment is performed when a voltage higher than a predetermined voltage is input, and replenishment is stopped when the input voltage is less than the predetermined voltage, “ The “replenishment start signal” is a continuous signal having a voltage equal to or higher than a predetermined voltage.

  “Replenishment stop signal” is a signal necessary to create or maintain a state in which the pump provided in the replenishing device does not transfer the medicine in the storage tank to the washing tank, and is an intermittent signal. However, it may be a continuous signal. Further, “outputting the supply stop signal” includes the meaning of not outputting the supply start signal or maintaining the state. Therefore, taking the example of the stepping motor described above, a state where no drive pulse voltage is output or a state where a control signal for starting output of the control power supply is not output outputs a supply stop signal.

  The “control unit” is a unit that inputs data necessary for each element of the cleaning device to operate properly, performs an operation to determine the operation of each element, and outputs a predetermined signal to each element. is there. Specifically, input means (for example, numeric keypad, touch panel) that receives the intention of the person who manages the cleaning process, measuring equipment (for example, sensor controller, timer, counter) for grasping the state and status of the cleaning device, input unit, Storage means (for example, a semiconductor memory) for storing data input from a measuring device, calculation means (for example, a CPU) for performing calculations based on input data or data stored in the storage means, and each element based on the results of the calculation means Output means (for example, a control power supply and a relay), and further, notification means (for example, a liquid crystal display and an alarm device) for notifying the manager of the cleaning process of the state and condition of the cleaning state.

  (2) A cleaning apparatus that performs a cleaning process while supplying at least one type of liquid replenishment medicine to the cleaning liquid, and a cleaning tank having a main tank section that contains the cleaning liquid and performs cleaning of the cleaning target; A pump unit that circulates the cleaning liquid in the main tank section by sucking a part of the cleaning liquid in the main section and letting this cleaning liquid flow out from the discharge section provided outside the main tank section, and installed after the discharge section of the pump unit. The tank has a capacity of 4 to 50% of the capacity of the main tank, temporarily stores the cleaning liquid from the pump unit, the storage tank for storing the replenishing medicine, and the storage tank from the storage tank. The cushion tank has a replenishing device for replenishing replenishing medicine and a controller for outputting a replenishment start and replenishment stop signal to the replenishing device, and the cushion tank has a cleaning liquid level in the main tank. Higher than And a replenishment box for replenishing the cleaning liquid inside the cushion tank with a replenishment agent. The replenishment box is a first inflow portion into which the replenishment agent from the storage tank is poured. And the second inflow part into which the cleaning liquid from the discharge part of the pump unit is poured, and the replenishment medicine poured from the first inflow part while being diluted with the cleaning liquid poured from the second inflow part. And an outflow portion that flows out into the cushion tank.

  Since the capacity of the cushion tank is smaller than the capacity of the main tank, the liquid flow in the cushion tank is higher than that of the main tank. For this reason, the cleaning liquid in the cushion tank is stirred more intensely than the main tank. Therefore, by providing the replenishment box in the cushion tank, the replenished medicine quickly diffuses into the tank, and a local high concentration region is unlikely to occur. From this point of view, it is preferable that the capacity of the cushion tank is small. However, if the capacity is too small, the difference between the liquid composition in the cushion tank and the liquid composition in the main tank portion becomes large, and management of the liquid composition becomes difficult. For this reason, the capacity | capacitance of a cushion tank shall be 4 to 50% of the capacity | capacitance of a main tank part. Preferably it is 10 to 30%, and particularly preferably 15 to 25%.

  The cleaning liquid stored in the cushion tank is preferably configured so that the overflow amount is supplied into the main tank so that the liquid level of the cushion tank does not fluctuate. By keeping the liquid level constant, the amount of the stored cleaning liquid is stabilized, and as a result, the composition of the cleaning liquid supplied into the main tank is easily stabilized. Further, when liquid state measuring means such as a sensor is installed in the cushion tank, the measurement environment is stabilized and the reliability of the measurement result is increased because the liquid level is constant.

  (3) The cleaning device according to (1) or (2), wherein the cleaning tank has an overflow part for temporarily storing the cleaning liquid overflowed from the main tank part, and the cleaning liquid in the overflow part is a pump unit. Is sucked into.

The cleaning apparatus described in (1) to (3) performs the control described in (4) below , and further performs the control described in (5) to (8) alone or in combination. May be.
(4) The control unit includes a signal from the unit that measures the liquid level in the main tank unit, a signal from the unit that measures the processing time of the cleaning process, a signal from the unit that measures the processing amount of the cleaning process, Based on these signals, it is determined whether to start or stop replenishment based on at least one of the signals from the means for measuring the liquid state. Based on the determination, a replenishment start signal or a replenishment stop signal is provided. Output to replenishment device.

  Here, the means for measuring the liquid state of the cleaning liquid is preferably installed in the cushion tank in the case of the configuration having the cushion tank, and in the main tank portion in the configuration without the cushion tank.

  (5) The control unit determines whether replenishment should be started or stopped by inputting a signal based on the liquid state index measured by the means for measuring the liquid state of the cleaning liquid, and is defined based on the liquid state index. The first set value S1 and the second set value S2 (where S1 <S2) are provided in the control parameter to be supplied, and the replenishment start control is performed on condition that the control parameter is equal to or less than the first set value S1. A signal is output to the replenishing device, and control is performed to output a replenishment stop control signal to the replenishing device on condition that the second set value S2 or more is reached.

  “Liquid state index” is an index indicating the physical and chemical state of the cleaning liquid. For example, conductivity, pH, specific ion concentration, temperature, viscosity, transmittance, density (specific gravity), fine particles in the liquid Examples include a distribution state (specific examples include dispersion of fine particles in a liquid and particle size distribution).

  Further, the “control parameter” is a parameter that is directly used by the control unit when performing the control, and the liquid state index may be applied as it is, or converted from these indices such as the degreasing component concentration. Other parameters may be used.

  Furthermore, the liquid state index used as a control parameter or for calculation thereof may be one or plural. In the case of a plurality, either one may be adopted, or the control parameter may be calculated based on a plurality of indices. The calculation process related to such control parameters may be performed by the control unit, or may be calculated by the cleaning liquid sensor and the result may be output as a signal to the control unit.

  The control condition may be that the control parameter is less than S1 for the first set value S1, and the control condition is that the control parameter exceeds S2 for the second set value S2. It is good.

  (6) The control unit determines whether replenishment should be started or stopped by inputting a signal based on the liquid state index measured by the means for measuring the liquid state of the cleaning liquid, and is defined based on the liquid state index. On the condition that the variation of the control parameter is less than the predetermined set value, exceeds the set value, and shows the same numerical value as the set value. One dead time T1 is set, and within the first dead time T1, a replenishment stop / start signal is output based on the signal even if the control parameter is greater than or less than the set value. Do not control.

By setting the dead time in this way, it is possible to eliminate the influence of chattering, and the load on the pump unit is reduced.
Here, (a) “below the set value” means that the condition is satisfied when the numerical value of the control parameter is equal to or larger than the predetermined set value and the numerical value decreases to become less than the set value. (B) “Exceeding the set value” means that the value of the control parameter is less than or equal to the specified set value, but the condition is satisfied when the value increases and exceeds the set value. It means that. (C) “Shows the same numerical value as the set value” means that when the numerical value of the control parameter is the same as the predetermined value specified by the predetermined number of significant digits, it is irrelevant to the transition of the previous numerical value. In other words, it is determined that the condition is satisfied. The timing may be started when any one of these conditions (a), (b), and (c) is satisfied, either (b) or (b), or (b) ) Or (c) may be started when the time is satisfied.

  In addition, the relationship between the dead time and the pump operation control signal may be to start the dead time measurement after outputting the replenishment start or stop signal, or to start or stop the replenishment after the dead time measurement ends. A signal may be output. If a signal for starting or stopping replenishment is output after the dead time has been counted, the control parameter should be compared with the set value again after the time has elapsed to determine whether or not to operate. More reliable control is possible.

  Further, a plurality of set values for determining the start of the dead time may be set as shown in (5), or the first dead time (for example, T1) for starting the pump supply and the pump supply stop. The second dead time for (for example, T2) may be set independently.

  (7) The control unit starts a countdown timer included in the control unit on the condition that a replenishment start signal is output to the replenishment device, and a control signal for stopping the supply until the countdown timer finishes counting. A control for outputting a supply stop signal to the supply device is performed on the condition that the output has never been output.

  (8) A replenishment drug flow rate measurement unit that measures the flow rate of the replenishment drug flowing out of the storage tank by the replenishment device and / or a replenishment drug remaining amount measurement unit that measures the remaining amount of the replenishment drug in the storage tank, The control unit outputs a replenishment stop signal to the replenishing device on condition that an abnormal signal output from the replenishing medicine flow rate measuring means and / or the replenishing medicine remaining amount measuring means is input.

  A specific example of the “supplementary medicine flow rate measuring means” is a flow meter. As a specific example of the operation of this means, it is installed downstream of a pump as a replenishing device, and an abnormal signal is generated when the liquid flow is in an inappropriate state for a predetermined time, for example, no liquid flow. That's fine.

  Specific examples of the “replenishment drug remaining amount measuring means” include a liquid level sensor and a weighing scale. Further, as a specific example of the operation of this means, an abnormal signal may be generated when the fluctuation of the liquid level or the liquid weight is in an inappropriate state for a predetermined time, for example, no fluctuation.

The cleaning unit for performing the first cleaning process and the other wet process using the cleaning apparatus described in the above (1) to (8) has the following characteristics.
(9) The control unit included in the cleaning device for performing the first cleaning process partially executes control related to the liquid management of the other wet process, the process state and / or the process status of the other wet process. The purpose of executing the control related to the first cleaning process based on the data and the liquid management of another wet process for at least one of the replenishing devices provided in the cleaning apparatus for performing the first cleaning process At least one of outputting a replenishment start signal.

  Here, “another wet process” refers to a wet process that is performed prior to or subsequent to the first cleaning process on the cleaning target of the first cleaning process. Specifically, a cleaning process other than the first cleaning process performed using the cleaning apparatus according to the present application, a water cleaning process, an activation process, an acid cleaning process, a plating process, an anodizing process, a chemical conversion process, a sealing process, Examples include coloring treatment and painting treatment.

  As an example of “executing part of control related to liquid management of other wet processing”, it was input from a nickel sensor attached to the electroless plating bath for a pump that replenishes nickel components in the electroless plating processing. For example, a control signal for driving is output based on the data.

  “Processing state” in “data relating to processing state and / or processing state of other wet processing” refers to, for example, the liquid composition in the processing tank or the state of the liquid level in the processing tank, and “processing state” means For example, the elapsed time from the start of the process, the number of processes to be processed, etc. “Data relating to the processing state and / or processing status” is input to the control device according to the present invention from various sensors attached to each processing and a timer or counter provided in the processing device for the processing.

  On the other hand, in the cleaning apparatus described in (1) to (3), even if it is a high-viscosity replenishment drug such as an alkali builder, for example, a locally high concentration state in the main tank is suppressed. . When this local high-concentration region comes into contact with the object to be cleaned, the replenishing drug and the object to be cleaned may react on the surface, resulting in a surface state called “burn”. Further, when a measurement part such as a conductivity sensor is touched, an abnormal signal may be generated, or in the worst case, the sensor may be destroyed. Therefore, according to the cleaning apparatus according to the present invention, stable maintenance of the cleaning capability is realized.

  Further, by performing the control described in (4) to (8), it is possible to suppress abnormal supply of the supplementary medicine. For this reason, according to the washing | cleaning apparatus which concerns on this invention, the further stable maintenance of washing | cleaning capability is implement | achieved.

  The cleaning unit according to (9) for performing the first cleaning process using the cleaning apparatus described in (1) to (8) above and another wet process realizes a part of the equipment in common. This is advantageous from an economic point of view. In addition, by controlling in consideration of management information in other wet processing (for example, data from a sensor that counts the number of processes and a liquid state is measured), the accuracy of the control is increased, It is possible to highly prevent the occurrence of malfunction.

  Hereinafter, the cleaning apparatus and the cleaning unit according to the present invention will be described including a specific configuration example. In addition, these forms of description are examples which show the form with a higher effect in arbitrary production lines, do not reflect all the forms, and do not restrict this invention to the said form.

(Cleaning apparatus according to the first embodiment)
〔overall structure〕
FIG. 1 is a block diagram conceptually showing the configuration and operation of the cleaning apparatus according to the first embodiment of the present invention. In the present embodiment, the case where a cleaning process is performed in which cleaning is performed while appropriately supplying two types of replenishment agents, that is, an active agent component and an alkali builder component, is illustrated. Even if there are more than one type, there is essentially no difference.

  A cleaning apparatus 100 according to the first embodiment includes a cleaning tank 103 having a main tank part 101 and an overflow part 102 for performing a cleaning process on a cleaning target, and a main tank part by sucking a part of the cleaning liquid in the overflow part 102. A pump unit 104 that circulates cleaning liquid by being transferred into the interior 101, a first storage tank 105 that accumulates activator, a second storage tank 106 that accumulates alkali builder, and each storage tank Based on two replenishing devices 107 and 108 for replenishing the active agent and alkali builder from the cleaning tank to the cleaning tank, a cleaning liquid sensor 109 for measuring the conductivity of the cleaning liquid in the cleaning tank 103, and a signal from the cleaning liquid sensor 109, respectively. And a control unit 110 for outputting a supply start signal and a supply stop signal to the supply devices 107 and 108.

[Supply box]
The main tank unit 101 includes a replenishment box 111 for efficiently replenishing the alkali builder with the cleaning liquid, and the replenishment box 111 is a first inflow portion into which the alkali builder from the second storage tank 106 is poured. 112, the second inflow portion 113 into which the cleaning liquid from the pump unit 104 is poured, and the alkali builder poured from the first inflow portion 112 is diluted into the cleaning liquid poured from the second inflow portion 113. While having the outflow part 114 which flows out into the main tank part 101 together.

  Thus, in the replenishment box 111, the alkali builder is diluted with the cleaning liquid from the pump unit 104. For this reason, it becomes difficult to generate | occur | produce the area | region where alkali builder exists in high concentration in this tank part even if it is local.

  The first and second inflow portions 112 and 113 may have a structure sharing one opening as shown in FIG. 3 or may have a structure having individual openings. However, it is preferable to provide the first inflow portion 112 between the second inflow portion 113 and the outflow portion 114 into which the cleaning liquid flows. This is because alkali builder is replenished in the flow of the cleaning liquid from the second inflow portion 113 to the outflow portion 114, and rapid dilution of the alkali builder is realized.

  Moreover, the outflow part 114 may not be single as shown in FIG. In this case, the cleaning liquid whose cleaning ability has been recovered is replenished to the main tank unit 101 from a plurality of locations, and the cleaning capacity inside the main tank unit 101 can be made uniform, which is preferable. However, even in this case, it is preferable to configure the replenishment box 111 so that alkali builder is replenished in the flow of the cleaning liquid from the pump unit 104 as described above. An example of a specific structure of the replenishment box 111 having a plurality of outflow portions 114 is a “cage” having a plurality of holes.

  Since the alkali builder shown as an example in the embodiment of the present application is generally highly concentrated, it is preferable to replenish while diluting with the above-described configuration. If the viscosity of the activator is high, the replenishing device preferably has a similar dilution mechanism, and may share the dilution mechanism with the alkali builder. However, the first inflow portion 112 for replenishing alkali builder and the third inflow portion for replenishing the activator may be separated as much as possible, and both may be in contact with each other at a high concentration in the replenishment box. It is preferable not to do so. This is because if the contact is made in a high concentration, a hardly soluble substance having no cleaning ability may be formed. On the other hand, when the viscosity of the activator is not high, the main tank unit 101 and / or the overflow unit 102 may be directly replenished. In this case as well, it is preferable to keep the alkali builder replenishment part as far as possible to suppress the formation of a hardly soluble substance. In FIG. 3, the structure which replenishes this tank part 101 as an example is shown.

  In addition, although the installation position of the replenishment box 111 is provided in the main tank unit 101 in the above description, it may be provided in the overflow unit 102. In this case, the cleaning liquid overflowing from the main tank portion 101 is poured into the second inflow portion. Further, when the replenishment box 111 is provided in the main tank unit 101, the overflow unit 102 may not be provided. However, the presence of the overflow part 102 makes it easy to stabilize the liquid volume in the main tank part 101 and makes it difficult for fluctuations in the liquid composition due to chemical replenishment to occur. Further, since the oil and fat floating on the liquid surface is removed from the main tank unit 101 as an overflow, there is an advantage that liquid deterioration hardly occurs.

(Configuration of control unit)
The control unit 110 includes a signal from the means for measuring the liquid level in the main tank unit 101, a signal from the means for measuring the processing time of the cleaning process, a signal from the means for measuring the processing amount of the cleaning process, and the main tank Based on at least one of the signals from the means for measuring the liquid state of the cleaning liquid in the unit 101, it is determined whether replenishment should be started or stopped based on these signals. A signal or a supply stop signal is output to the supply devices 107 and 108. Here, the output of the signal includes a mode in which the output signal is stopped.

  Some specific examples of the control unit 110 are shown below. First, examples of means for measuring the liquid level in the main tank unit 101 include a limit switch and a proximity switch. Since such a switch outputs a predetermined signal on condition that the liquid level has reached a predetermined level, the control unit 110 that has input the signal outputs a start or stop signal based on the signal, and supplies the replenishing device. The operation of the pumps 107 and 108 is started or stopped.

  When cleaning is performed by putting a barrel having a cleaning target (for example, a small part) into the main tank unit 101, the liquid level rises when the barrel is inserted and the liquid level decreases when the barrel is pulled up. It is possible to detect the start and end of cleaning by managing the liquid level. When the degree of dirt to be cleaned is almost constant, it is possible to roughly estimate the cleaning ability that decreases with a single barrel cleaning, so the alkali builder and activity to be replenished based on that estimate The amount of the agent may be determined, and when the liquid level is lowered, that is, when the cleaning is completed, a predetermined amount thereof is supplied to recover the cleaning ability. Alternatively, replenishment may be started when the liquid level rises to prevent the cleaning ability from being lowered.

  Next, a timer is exemplified as means for measuring the processing time of the cleaning process. Controls the replenishment amount by sending a signal to start the pump operation after determining that the predetermined time has been reached by a signal from the timer, and outputting a stop signal or stopping the operation signal after the predetermined time has elapsed Is possible.

  When the object to be cleaned is a hoop material or a line shape in which the same parts are held at predetermined intervals on the wire, the decrease in the cleaning performance per unit time (cleaning capacity decrease rate) is almost constant. Thus, it is realized that the cleaning ability is kept substantially constant by replenishing a predetermined amount of alkali builder or activator with the above time management.

  Examples of means for measuring the processing amount of the cleaning process include using a barrel positioning sensor of a barrel control system and a hoop material transfer distance measuring sensor. In the case of a barrel positioning sensor, replenishment may be started using an input or pull-up signal. In the case of a transfer distance measuring sensor, replenishment is performed on the condition that the hoop material has been fed a predetermined distance. That's fine.

  The controller 110 starts or stops operations of the replenishing devices 107 and 108 based on a controller that outputs predetermined signals based on signals from various sensors and a sequence set in advance as inputs of these signals. A sequencer that outputs a control signal, display means for displaying the status of various sensors, and data input means for setting the sequencer and controller are provided. The display means and the input means may be a touch panel having both functions. In addition, you may provide the alerting | reporting means for alert | reporting that the abnormality which concerns on a cleaning process, or chemical | medical solution replenishment is required.

  Further, the replenishing devices 107 and 108 may perform part of the signal processing performed by the control unit 110. In this case, signals from the switches, timers, sensors, etc. are input to the replenishing devices 107 and 108 via the control unit or directly.

[Configuration of control unit using liquid state sensor]
Next, a case where a sensor that measures a liquid state is used will be described.
If the objects to be cleaned are almost the same between batches and the same process is repeated every day, replenishment of alkali builder should be controlled based on the measurement results of the liquid level, time, and throughput as described above. Thus, it is possible to obtain a substantially stable cleaning quality.

  However, when the amount of processing varies from barrel to barrel or processing targets in various contaminated states are mixed, the liquid state changes and it is difficult to stabilize the processing quality.

  Therefore, in such a case, the liquid state is measured by the cleaning liquid sensor 109 as shown in FIG. 3, and the control unit 110 should start replenishment based on the information from the cleaning liquid sensor 109 or stop the replenishment. A calculation for determining whether or not there is a supply is performed, and a supply start or stop signal is output according to the result. The liquid state measured by the cleaning liquid sensor 109 includes, for example, conductivity, pH, specific ion concentration, temperature, viscosity, transmittance, density (specific gravity), fine particle distribution state in the liquid (specifically, concentration, particle diameter Distribution).

[Cleaning liquid sensor and control unit]
The operation of the control unit 110 based on the output signal from the cleaning liquid sensor 109 will be described below with an example in which the cleaning liquid sensor 109 measures the conductivity.

  First method: A high concentration (ie, high viscosity) drug takes a certain amount of time to be dissolved after being replenished. For this reason, a difference inevitably occurs between the timing of replenishment and the timing measured as a change in conductivity. This time difference causes the drug to be replenished more than necessary, and is measured as an overshoot. This overshoot can be suppressed by reducing the replenishment amount per unit time. However, when the amount of the drug consumed is large, the replenishment cannot catch up and there is a possibility of causing a chronic decrease in concentration.

  Therefore, the control unit 110 provides the first set value S1 and the second set value S2 (S1 <S2) for the conductivity, and the conductivity measured by the cleaning liquid sensor 109 is the first set value. A replenishment start signal is output to the replenishing devices 107 and 108 on the condition that the value is S1 or less, and a replenishment stop control signal is provided on the condition that the value is equal to or greater than the second set value S2. Output to. By performing such control, it is possible to minimize overshoot.

  Second method: If a set value is set to one and if the conductivity is less than that conductivity, a replenishment start signal is output, and if it is equal to or greater than that conductivity, a replenishment stop signal is output. Thus, when the conductivity fluctuates in a short time (chattering), the pumps of the replenishing devices 107 and 108 are turned on and off each time, and a burden is imposed on the contacts of the control system, causing a failure in a short period of time. End up. In the case of a high-viscosity drug, since it is difficult to dissolve uniformly, a delay in the variation in conductivity tends to occur. For this reason, this chattering is particularly likely to occur.

  Therefore, once the conductivity is less than the set value and a replenishment start signal is output, a first dead time T1 of a predetermined time is set, and the conductivity is set within the first dead time T1. The supply stop / start signal is not output based on the signal when the value exceeds the value or less than the set value. Then, after the first dead time T1 elapses, when the conductivity becomes a set value or more, a replenishment stop signal is output, and then a second dead time T2 (T2 = T1 may be set) is set. During this time, the supply start / stop signal is not output. By setting the time when chattering is likely to occur as the dead time in this way, unnecessary pump ON / OFF is suppressed, and device failure is suppressed.

  In the above control, the signal is output before the dead time is measured. However, the signal may be output after the dead time is counted. At this time, after measuring the dead time, it is preferable to measure the conductivity again and determine whether or not to output the control signal from the viewpoint of improving the reliability of the control.

  In addition, the first method and the second method described above have a high effect even when used alone, but a higher effect can be obtained by using both methods in combination. Further, when the cushion tank 201 is used, a particularly high effect is obtained, which is a preferable mode.

[Safety measures for drug supply]
Subsequently, a control method for preventing excessive medicine supply provided in the control unit 110 according to the present embodiment will be described.

  Method 1: The control device 100 according to the present embodiment includes a flow sensor that measures the flow of the alkali builder and the activator that flows out of the storage tanks 105 and 106, and the control unit 110 has the conductivity measured by the cleaning liquid sensor 109. Even if the control signal for starting replenishment is output based on the condition, it is determined that an abnormality has occurred regarding the outflow of at least one of the alkali builder and the activator from the storage tank based on the data from the flow sensor. Then, a supply stop signal is output (FIG. 2).

  Method 2: Further, the storage tanks 105 and 106 include storage amount measuring sensors for measuring the respective storage amounts, and the control unit 110 stores that the conductivity measured by the cleaning liquid sensor 109 is equal to or less than a set value. The start of replenishment of alkali builder and activator on condition that it was determined that there was no abnormality in the outflow of both alkali builder and activator from storage tanks 105 and 106 based on the data from the quantity measuring sensor A signal is output to the replenishing devices 107 and 108 (FIG. 3).

  Method 3: Furthermore, when a supply start signal is output to the supply devices 107 and 108, a countdown timer provided in the control unit 110 is started, and then it is determined whether or not a supply stop signal is output in the countdown loop. Execute. Then, when the countdown timer has finished counting, the control unit 110 outputs a supply stop signal to the supply devices 107 and 108 on the condition that the supply stop signal has never been output (FIG. 4). . By doing so, even if the medicine is replenished to some extent due to some abnormality, it is realized that the replenishment is stopped before the entire cleaning liquid reaches a fatal state. It should be noted that the setting time of the countdown timer in this control is longer than the above dead time, for example, set to about 5 times that. In addition, since even one of the above methods functions as a sufficient oversupply prevention measure, it is not essential to have all the controls.

  Note that a part of the control performed by the control unit 110 as described above may be executed by the replenishment device auxiliary control unit that the replenishment devices 107 and 108 individually have. By doing in this way, the control load of the control part 110 can be relieved and the operation | movement stability as a washing | cleaning apparatus increases.

(Cleaning apparatus according to the second embodiment)
FIG. 5 is a block diagram conceptually showing the configuration and operation of the cleaning apparatus according to the second embodiment of the present invention. In FIG. 5, the same reference numerals as those in FIG. 1 are omitted, but in the following description, the reference numerals in FIG.

[Second overall configuration]
The cleaning device 200 according to the second embodiment will be described focusing on differences from the cleaning device 100 according to the first embodiment. The cleaning apparatus 200 includes a cleaning tank 103 that performs a cleaning process on an object to be cleaned, a cushion tank 201 having an outflow portion 202 that allows an internal cleaning liquid to flow out into the cleaning tank 103, and a cleaning liquid in the cleaning tank 103 into the cushion tank 201. A pump unit for transporting, a first storage tank for accumulating alkali builder, a second storage tank for accumulating activator, and two for replenishing alkali builder from each storage tank into the washing tank A replenishing device, a cleaning liquid sensor 109 that measures the conductivity of the cleaning liquid in the cushion tank 201, and a control unit 110 that outputs a replenishment start and replenishment stop signal to the replenishing device based on a signal from the cleaning liquid sensor 109. .

[Composition of cushion tank]
The cushion tank 201 has a smaller volume than the cleaning tank 103, and the cleaning liquid volume in the cushion tank 103 is 4 to 50% or less, preferably 10 to 30%, particularly preferably 15 to 25% of the cleaning liquid capacity in the cleaning tank 103. It is. Also, the liquid level of the cushion tank 201 is set to be higher than that of the cleaning tank 103, and the first inflow portion into which the cleaning liquid from the pump unit flows in, and the second and third in which the medicine from each replenishing device flows in. And an inflow portion. As a preferred form, between the first inflow portion and the outflow portion 202, the second and third inflow portions are provided on the first inflow portion side, and the cleaning liquid sensor 109 is provided on the outflow portion 202 side.

  Since the cushion tank 201 has a smaller volume than the cleaning tank 103, the liquid flow is faster in the interior of the cushion tank 201 than in the cleaning tank 103, and the cleaning liquid is strongly stirred. For this reason, even if it is a chemical | medical agent with high viscosity like an alkali builder, if it replenishes in the cushion tank 201, it will stir rapidly and it will be hard to remain the area | region where a density | concentration is locally high. Therefore, the concentration of the cleaning liquid supplied from the outflow portion 202 of the cushion tank 201 to the cleaning tank 103 is highly uniform.

  As described above, since the concentration of the cleaning liquid in the cushion tank 201 is high in uniformity, it is detected by measuring the state of the cleaning liquid in the cushion tank 201 rather than detecting the state of the cleaning liquid in the cleaning tank 103 by the cleaning liquid sensor 109. There is little variation in results, and as a result, excessive drug supplementation such as overshoot is difficult to be performed.

  Further, since the cleaning agent from the outflow portion 202 of the cushion tank 201 is replenished to the cleaning tank 103 using a drop, the liquid level of the cushion tank 201 is always constant. Therefore, when the cleaning liquid sensor 109 is installed in the cushion tank 201, the detection unit is not exposed on the liquid surface. On the other hand, when the cleaning liquid sensor 109 is installed in the cleaning tank 103, the liquid level of the cleaning tank 103 may fluctuate greatly during the cleaning operation as in barrel cleaning. There is a risk that the surface is lowered and the detection unit is exposed on the liquid surface. At this time, of course, normal measurement is not possible, it is misunderstood that the conductivity is low, and the drug is continuously replenished, the composition of the cleaning solution greatly exceeds the suitable range, and it becomes a fatal state that can not be recovered There is also a risk.

  Further, since the capacity in the cushion tank 201 is constant, the liquid composition of the cleaning liquid supplied to the cleaning tank 103 is unlikely to vary. For this reason, fluctuations in the liquid composition in the cleaning tank 103 are less likely to occur, and further improvement in the stability of the cleaning performance is realized.

As a particularly preferable form of control when the cushion tank 201 is used, the above-mentioned dead time is set to be long, and the replenishment amount per unit time of the replenishment pump is set to be low to replenish the medicine. Increase the time to do.
Further, a cushion tank 201 may be provided, and an overflow portion may be further provided.

(Cleaning unit according to the third embodiment)
A cleaning unit including the configuration of the cleaning device according to the first or second embodiment as described above will be described below as a third embodiment.

  The cleaning apparatuses described as the first and second embodiments maintain a stable cleaning ability over a long period of time by replenishing a liquid medicine according to the state of the cleaning liquid. In the cleaning unit according to the third embodiment, a part of the control unit for performing chemical replenishment is performed using another wet process (pickling bath, plating bath, phosphoric acid bath, washing bath) related to other cleaning processes and surface treatment. Etc.) are made common with the equipment for control in. Further, as a mode of the control, the replenishing device of the cleaning device can be operated for replenishing chemicals for other processing, and as a result, the common use of equipment such as the replenishing device is realized. Such common use of equipment elements including the control unit can be realized because it is a cleaning device that replenishes a concentrated liquid medicine as needed as in the present invention. It cannot be made common in the method of replenishing the cleaning composition. The sharing of a part of the equipment is advantageous from an economical point of view, as well as management information in other processes (for example, counting the number of processes and data from sensors for measuring the liquid state). By performing the control in consideration, it is possible to obtain a new effect that the accuracy of the control is improved or the occurrence of malfunction is highly prevented. When a processing target is a semiconductor-related component such as a printed circuit board or a precision mechanism component such as a digital camera, high cleaning capability and stabilization of the capability are strictly required. The cleaning unit according to the present embodiment can meet such strict requirements for cleaning objects.

  The cleaning unit according to the third embodiment is for the management and replenishment of the pretreatment process, and among the chemical process of the metal surface, the process before the main treatment such as plating, painting, heat treatment (hereinafter, It is characterized in that, for at least one or more of all the treatment baths included in the pretreatment step), items necessary to maintain the performance required for each are collectively controlled. More specifically, the treatment bath in the pretreatment step in which the unit is to be provided includes at least one of a degreasing bath, a pickling bath, an electrolytic bath, and a washing bath. It may be a plurality of baths of the same bath type.

  Furthermore, each processing bath in the pretreatment process of the unit is provided with a sensor necessary for managing matters necessary for maintaining its performance, so that measurement information obtained from the sensor can be specified. A system characterized by collectively managing preprocessing steps based on the result of analysis by one detector is attached. The analysis result of one specific detector is not particularly limited, and can be arbitrarily determined in consideration of the performance to be prioritized. In general, since cleaning performance is given priority, the result of analysis with one specific detector is preferably selected from the group of conductivity, hydrogen ion concentration, refractive index, absorbance, and color. Further, by attaching a controller to the system, it is possible to perform an operation required to reach the required performance based on the analysis result.

  In the case where the cleaning performance is determined by the unit, when the performance depends only on the alkalinity, caustic soda and other alkaline components may be replenished to the degreasing bath. For example, the alkaline component is composed of a single chemical. If the replenishment ratio is constant even if the alkali component is a mixture, the drug storage tank can be set to 1, and if it is necessary to change the replenishment ratio of the alkali component, it is set to 2 or more. It is also possible. As described above, the controller can be used to reach the required performance by providing one or a plurality of tanks containing not only the alkali component but also the chemical to be added to the pretreatment step as necessary.

  In some cases, not only the cleaning performance but also the space saving is required for the design of the production line. In this case, it is necessary to minimize the number of chemical storage tanks. For this purpose, it is possible to use a chemical stored in one tank for a plurality of baths in the pretreatment process. The replenishment amount of the medicine is operated by the controller so as to reach the performance required for each treatment bath to be replenished.

  For example, the degreasing bath and the electrolytic bath are both alkali-cleaned. However, since it is necessary to ensure high conductivity particularly in the electrolytic bath, the replenishment amount of the alkaline component is set larger than that of the degreasing bath. Conversely, it can be used in a degreasing bath only by changing the replenishment amount. Thus, if the chemical | medical agent replenished with respect to two or more process baths is made the same, a replenishment tank can be suppressed to the minimum, maintaining a fixed washing | cleaning performance.

  In other cases, it is generated by use such as countermeasures against foaming by surfactants included for the generation of soap components and enhancement of detergency, reduction of detergency due to emulsification of oil removed by washing, and countermeasures against recontamination by floating oil, etc. Prepare a drug storage tank with additives as needed for various troubles. You may replenish these 2 or more with respect to the process bath contained in a pre-processing process. Specifically, when the degreasing is performed by spray cleaning and the electrolytic bath is included in the unit, since the generation of bubbles hinders the operation of each treatment bath, the medicine replenishment tank containing the additive according to the cause It is also possible to replenish each of the electrolytic bath and the degreasing bath. As described above, by suppressing the number of necessary replenishment tanks to a small number, it is possible to improve the complexity of medicine order management in addition to the space saving described above.

  When collectively managing the pretreatment steps included in the unit, measurement information obtained from sensors provided to maintain each performance is analyzed by one detector, and the result is input to the controller. In terms of management and replenishment of the pretreatment process, it is necessary to provide various detectors for each of the entire treatment baths. However, in the present invention, a detector for analyzing the obtained measurement information must be provided for each sensor. No, one detector is enough. However, in order to realize this, it is necessary to install a device that automatically sends out the timing of use, such as a sequencer or hard relay. Further, the use timings to be set are aggregated so that they can be set in one panel, and all the pre-processing steps are performed by operating the panel, so that the system can be further characterized as a system attached to the unit. Thereby, the capital investment for installing a plurality of detectors can be greatly reduced, and the pretreatment process can be managed in total by operating one panel.

  As described above, in consideration of problems in workability, productivity, and cleaning quality of the powder cleaning agent, the drug replenished from the drug storage replenishment tank is preferably fluid, and if it is fluid, Replenishment amount operations with various pumps that could not be performed with powder properties can be performed.

  In addition, the replenished drug has sufficient fluidity to be replenished with a pump, thereby allowing the amount of the drug required for replenishment to reach the performance required for each treatment bath included in the pretreatment process. It can be as small as possible. The fluidity here refers to, for example, a level at which replenishment is possible by installing a slurry pump for mud fluid, or the amount of solvent is adjusted to a level at which replenishment is possible even with a general positive displacement pump. In some cases. The fluidity of the medicine to be replenished is not a fixed value, and can be set at the most appropriate level in accordance with the possibility of capital investment and the size of the installation space in the production line design. In addition to the adjustment of the amount of solvent, as a means to make the drug to be replenished in a thicker state, commonly known dispersants and anti-crystallization components may be added, but organic enough to improve the biodegradability excessively. Addition of components results in a reduction in environmental impact, which is not a preferable mode.

  Usually, in the pretreatment process, it is known that the degreasing bath often requires the strictest control, and the replenishment thereof is also the most quantitative. Therefore, by reducing the amount of the medicine for replenishing at least the degreasing bath as much as possible, the medicine storage tank can be made smaller, and as a result, it can greatly contribute to space saving as a unit.

  Pursuing the cleaning performance normally required in the pretreatment process by the unit for management and replenishment in the pretreatment process presented by the present invention, and workability and productivity which are particularly important issues in the production line As a result, the quality of cleaning was greatly improved, and as a result, mass production in the production line was presented in a more realistic form, and high productivity that could not be realized in the past could be secured. It should be noted that in addition to the cleaning performance, all the various factors that should be considered in the pretreatment process, such as the size of the drug tank installation space, the environmental impact due to the drug, the amount of manpower required to manage and maintain the drug order, etc. Unit design that pursues profitability considering the capital investment factor, which is regarded as most important in the production line, to the maximum extent is possible.

The form described below is an example of a third embodiment in which a high effect can be obtained in any production line.
A pretreatment process in which a degreasing bath, a pickling bath, and an electrolytic bath are each provided with a water-washing bath therebetween will be described. An electromagnetic conductivity meter is selected as the detector, and in consideration of the necessity of maintaining the performance, the washing bath is not controlled here. The three baths to be controlled are provided with optimum sensors for detecting the respective conductivity and connected to a detector. A chemical replenishment tank installed separately is connected to a controller, and the treatment bath is replenished based on the result of analysis by an electromagnetic conductivity meter. By installing a sequencer to operate this, all items that require control over the entire treatment bath can be performed by connecting touch panel operations.

  Here, five tanks for drug replenishment are provided, and any fluid drug is placed in the tank. Specifically, alkali builder, activator, acid, caustic soda aqueous solution and electrolysis additive are contained, which are taken out by a pump connected to the controller and replenished to the treatment bath. The alkali builder and the active agent are connected to one controller, and the medicine is taken out at a ratio based on a control command from the sequencer and replenished to the degreasing bath. Similarly, an aqueous caustic soda solution and an additive for electrolysis are connected to one controller to replenish the electrolytic bath, and an acid is connected to one controller alone and replenished to the pickling bath. Therefore, three controllers are prepared here.

  Items to be set and input by panel operation include the conductivity to be maintained for each treatment bath, the replenishment ratio of the chemical connected to the controller, and the analysis span (switching time) for each treatment bath. These set values can be determined in advance at the stage of setting the optimum processing conditions in the production line based on the component concentration of the replenishing drug, the contaminated species adhering to the object to be cleaned, and the like. For example, in a degreasing bath, in a preliminary test, the conductivity at a level that satisfies the quality of the cleaning performance obtained is set as the lower limit, and the surfactant and chelating agent are mainly used, taking into account the variation in conductivity every hour with respect to the processing amount. After determining the replenishment ratio of the activator and alkali builder mainly composed of alkali components, set an analysis time to confirm that stable conductivity can be obtained while continuing the process, and input the result to the panel. That's fine.

In the other pickling baths and electrolytic baths, the set values are similarly determined and entered into the panel.
After starting the production line operation in the pretreatment process after the above setting operation, the worker only has to confirm whether the medicine is filled in the replenishment tank without worrying about the danger of the medicine. Pre-processing can be performed while maintaining a certain quality.

Here, the features of the cleaning unit according to the third embodiment are summarized as follows.
(A) Of the chemical process on the metal surface, the process before the main treatment such as plating, painting, heat treatment, etc.
It is described as “pretreatment step”. A unit for management and replenishment of pretreatment processes, characterized in that, for at least one or more of all the treatment baths contained in (1), the items necessary to maintain the performance required for each are collectively controlled .

  (B) The total treatment bath included in the pretreatment step includes at least one or more of a degreasing bath, a pickling bath, an electrolytic bath, and a water washing bath. Unit for management and supply.

  (C) At least one or more of all the treatment baths included in the pretreatment process are provided with sensors necessary for managing matters necessary for maintaining the performance, and measurement information obtained from the sensors is provided. A system for ancillary to the unit described in (a) or (b) above, wherein the pretreatment process is collectively managed based on the result of analysis by one specific detector.

  (D) The result obtained by analyzing the measurement information obtained from the sensor installed in each treatment bath with one specific detector is one selected from the group of conductivity, hydrogen ion concentration, refractive index, absorbance, and color. The system according to (c) above, wherein

  (E) Based on the result of analyzing the measurement information obtained from the sensors installed in each treatment bath with one specific detector, the operations required to reach the required performance are performed using the controller. The system described in (c) or (d) above.

  (F) Based on the result of analyzing the measurement information obtained from the sensors installed in each treatment bath with one specific detector, the operations required to reach the required performance are performed using the controller, In order to perform this by replenishing medicine, at least one medicine storage tank is provided.

  (G) The number of replenishment tanks required is minimized by replenishing at least two or more of the total treatment baths included in the pretreatment process with the medicine replenished from at least one medicine storage tank. A system for ancillary to the unit described in (f) above.

  (H) For at least one or more of all the treatment baths included in the pretreatment process, sensors necessary for managing matters necessary for maintaining the performance are provided for each, and measurement information obtained from the sensors is provided. The system as described in (c) above, wherein when managing the pretreatment process collectively based on the result of analysis by one specific detector, all the management is integrated into one panel operation.

  (G) The system operation described in (ki) or (ku) above, wherein the operation required to reach the performance required for each treatment bath is performed by replenishing a fluid chemical. Method.

  (D) The amount of the drug required for replenishment to reach the performance required for each treatment bath is made as small as possible by providing the drug to be replenished and having sufficient fluidity for replenishment. The system operation method according to (K) above.

  (Sa) In the pretreatment step, in order to minimize the amount of the drug required for replenishment to reach the performance required for the degreasing bath, the replenished drug is at least one concentrated fluid. The system operation method according to (K) or (K) above.

1. Example 1: Stabilization of the cleaning function by a cleaning device Using the cleaning device of the first embodiment described above (Fig. 1), the surfactant viscosity is 37 mPas (20 ° C) containing 5 g / L of a surfactant and a chelating agent. ) Is a concrete result when the SPCC-SD steel plate coated with press oil is continuously treated while being replenished with chemicals as appropriate for the washing solution built with alkali builder 20 g / L. Described below.

  The control target value was 2.5% as the concentration of the degreasing component in the cleaning liquid obtained by conversion from a cleaning liquid sensor that measures conductivity. In order to achieve this management target value, the first set value S1 is set to 2.45%, the second set value S2 is set to 2.55%, and control by the first method is performed for both the alkali builder and the activator. Went against. In addition, the second method was also used to set the dead time T1 after the start of replenishment to 10 seconds and the dead time T2 after the replenishment stop to 3 seconds for both the alkali builder and the activator.

FIG. 6 shows the transition of the degreasing component concentration converted from the cleaning liquid sensor under these conditions. It can be seen that stable control of the degreasing component concentration has been realized over a long period of time.
2. Example 2: Cleaning unit A specific example of a cleaning unit including the cleaning apparatus described in Example 1 will be described.

  When designing the production line for the pretreatment process, as a result of the factor analysis, one bath is managed for each of the degreasing bath (that is, the first washing treatment) and the electrolytic bath (the second washing treatment that is one of the other treatments). It was supposed to be. In addition, a sensor for detecting conductivity was installed in each treatment bath, and the data was analyzed with an electromagnetic conductivity meter. A total of 4 tanks were prepared for each of the alkali builder and the activator for the degreasing bath and each for the electrolytic bath, and a total of two controllers were connected to the combination of the main agent and the auxiliary agent. In the operation panel connected to the sequencer, the supply ratio of alkali builder and activator in each treatment bath was input (4: 1 for degreasing bath, 2: 1 for electrolytic bath), and the analysis span was set to 10 minutes. . The set conductivity was collectively controlled as 20 g / L in the degreasing bath and 60 g / L in the electrolytic bath in terms of new solution concentration.

  In order to determine the cleaning performance of the treatment bath, the conductivity of each treatment bath was recorded every 10 minutes and the maintenance stability was confirmed. At the same time, the finish of the washed product (dirt, water repelling, etc.) was visually observed. .

  According to the transition of 20 days (average operation time per day: 8 hours) when the line is actually in operation within 30 days from the working day, both the degreasing bath and the electrolytic bath are stable, and the entire day is washed. There was no visual problem with respect to the finished product, and no defects such as plating peeling were observed in the subsequent process. Furthermore, the results of cost estimation required to install the unit were also expected to be sufficiently profitable on the line.

It is the figure which showed notionally the structure of the washing | cleaning apparatus which concerns on 1st embodiment of this invention. It is a flowchart which shows operation | movement of an example of the control with which the washing | cleaning apparatus which concerns on 1st embodiment of this invention is provided. It is a flowchart which shows operation | movement of another example of the control with which the washing | cleaning apparatus which concerns on 1st embodiment of this invention is provided. It is a flowchart which shows operation | movement of another example of the control with which the washing | cleaning apparatus which concerns on 1st embodiment of this invention is provided. It is the figure which showed notionally the structure of the washing | cleaning apparatus which concerns on 2nd embodiment of this invention. It is a measurement density transition graph which shows the state of density management concerning Example 1 of the invention in this application.

Claims (8)

A cleaning device that performs a cleaning process while supplying at least one liquid replenishment drug to the cleaning liquid,
A cleaning tank having a main tank part for cleaning a cleaning target, which contains a cleaning liquid;
A pump unit that circulates the cleaning liquid by sucking and discharging a part of the cleaning liquid in the main tank unit;
A storage tank for storing the replenishing drug;
A replenishing device for replenishing the replenishing drug from the storage tank into the cleaning tank;
A controller for outputting a supply start signal and a supply stop signal to the supply device;
The main tank part includes a replenishment box for replenishing the cleaning liquid in the main tank part with the replenishment medicine,
The supply box is
A first inflow portion into which a replenishment drug from the storage tank is poured;
A second inflow portion into which the cleaning liquid from the pump unit is poured;
The replenishment medicine poured from the first inflow part has an outflow part that flows out into the main tank part while being diluted with the cleaning liquid poured from the second inflow part ,
The control unit includes a signal from a unit that measures the liquid level in the main tank unit, a signal from a unit that measures the processing time of the cleaning process, a signal from a unit that measures the processing amount of the cleaning process, and the At least one of the signals from the means for measuring the liquid state of the cleaning liquid is input, and based on these signals, it is determined whether replenishment should be started or stopped, and based on this determination, a replenishment start signal or replenishment stop signal A cleaning device that outputs a signal to the replenishing device. A cleaning device that performs a cleaning process while supplying at least one liquid replenishment drug to the cleaning liquid,
A cleaning tank having a main tank part for cleaning a cleaning target, which contains a cleaning liquid;
A pump unit that circulates the cleaning liquid in the main tank section by sucking a part of the cleaning liquid in the main tank section and causing the cleaning liquid to flow out from a discharge section provided outside the main tank section;
A cushion tank that is installed at a subsequent stage of the discharge unit of the pump unit, has a capacity of 4 to 50% of the capacity of the main tank unit, and temporarily stores the cleaning liquid from the pump unit;
A storage tank for storing the replenishing drug;
A replenishing device for replenishing the replenishing drug from the storage tank into the cleaning tank;
A controller for outputting a supply start signal and a supply stop signal to the supply device;
The cushion tank is installed so that the liquid level of the cleaning liquid inside thereof is higher than the liquid level of the cleaning liquid in the main tank part, and is used for replenishing the cleaning liquid inside the cushion tank with the replenishing agent. With a box,
The supply box is
A first inflow portion into which a replenishment drug from the storage tank is poured;
A second inflow part into which the cleaning liquid from the discharge part of the pump unit is poured;
The replenishment medicine poured from the first inflow part has an outflow part that flows out into the cushion tank while being diluted with the cleaning liquid poured from the second inflow part ,
The control unit includes a signal from a unit that measures the liquid level in the main tank unit, a signal from a unit that measures the processing time of the cleaning process, a signal from a unit that measures the processing amount of the cleaning process, and the At least one of the signals from the means for measuring the liquid state of the cleaning liquid is input, and based on these signals, it is determined whether replenishment should be started or stopped, and based on this determination, a replenishment start signal or replenishment stop signal A cleaning device that outputs a signal to the replenishing device.   The cleaning apparatus according to claim 1, wherein the cleaning tank has an overflow part that temporarily stores the cleaning liquid overflowed from the main tank part, and the cleaning liquid in the overflow part is sucked into the pump unit. The control unit determines whether replenishment should be started or stopped by inputting a signal based on the liquid state index measured by the means for measuring the liquid state of the cleaning liquid,
A first set value S1 and a second set value S2 (where S1 <S2) are provided as control parameters defined based on the liquid state index, and the control parameter is equal to or less than the first set value S1. A control to output a replenishment start control signal to the replenishment device on the condition that it has become, and to output a control signal to stop replenishment to the replenishment device on the condition that the second set value S2 or more Do
The cleaning apparatus according to any one of claims 1 to 3 . The control unit determines whether replenishment should be started or stopped by inputting a signal based on the liquid state index measured by the means for measuring the liquid state of the cleaning liquid,
The fluctuation of the control parameter defined based on the liquid state index is at least one state of less than a predetermined set value, exceeding the set value, and showing the same numerical value as the set value. As a condition, a first dead time T1 of a predetermined time is set. Within the first dead time T1, whether the control parameter is greater than or equal to a set value or less than the set value is based on the signal. To prevent the supply stop / start signal from being output.
The cleaning apparatus according to any one of claims 1 to 4 . The control unit starts a countdown timer included in the control unit on condition that a replenishment start signal is output to the replenishing device, and a replenishment stop control signal is once before the countdown timer finishes counting. Control to output a replenishment stop signal to the replenishment device on the condition that
The cleaning device according to any one of claims 1 to 5 . A replenishment medicine flow rate measuring means for measuring a flow rate of the replenishment medicine flowing out from the storage tank by the replenishment device and / or a replenishment medicine remaining amount measurement means for measuring a residual liquid amount of the replenishment medicine in the storage tank. Prepared,
The control unit outputs a replenishment stop signal to the replenishing device on condition that an abnormal signal output from the replenishing drug flow rate measuring unit and / or the replenishing drug remaining amount measuring unit is input.
The cleaning apparatus according to any one of claims 1 to 6 . A cleaning unit for performing a first cleaning process and another wet process using the cleaning device according to claim 1 ,
The control unit included in the cleaning device for performing the first cleaning process executes a part of the control related to the liquid management of the other wet process, the process state and / or the process status of the other wet process. Executing the control related to the first cleaning process based on the data, and the liquid of the other wet process with respect to at least one of the replenishing devices provided in the cleaning apparatus for performing the first cleaning process A cleaning unit that performs at least one of outputting a supply start signal for the purpose of management.

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