The specific embodiment
Below, with reference to the roller coating equipment of Fig. 1~3 explanation one embodiment of the invention.
Roller coating equipment 100 comprises: applying device 2, drying device 4, brace table 6, base station 8 and the lowering or hoisting gears such as jack 10 that brace table 6 is moved up and down; Applying device 2 gives the PS version matrix W coating of carrying with fixing speed in the direction (hereinafter referred to as throughput direction A) shown in the arrow A (Fig. 1 and Fig. 3) middle layer forming liquid; 4 pairs of drying devices applied the middle PS version matrix W that forms liquid by applying device 2 and carried out drying; Brace table 6 mounting applying devices 2 and drying device 4; Lowering or hoisting gear 10 is arranged between matrix 6 and the base station 8.Applying device 2 and drying device 4 are equivalent to applying mechanism and the drier in the coating device of the present invention respectively.
Applying device 2 have on PS version matrix W layer forming liquid in the middle of the coating coating portion 20, will apply the detecting rotational speed portion 24 that liquid supplies to the middle layer forming liquid supply unit 22 of coating portion 20, the rotating speed of application roll 20A described later is measured.
As shown in Figure 3, coating portion 20 has application roll 20A, pair of bearings parts 20B and rectangular-shaped application roll support component 20C, and the relative throughput direction A of application roll 20A meets at right angles and is provided with and rotates on the PS version matrix W that carries along throughput direction A when forming the intermediate layer drivenly; Pair of bearings parts 20B can support application roll 20A rotatably at both ends; Rectangular-shaped application roll support component 20C is arranged between the parts of bearings 20B and from supported underneath and makes the unlikely deflection of the application roll coating 20A of portion.
Application roll support component (to call support component in the following text) 20C has the V i section, has above it from the application roll support trenches 20D of supported underneath coating axle 20A.On the part of the throughput direction A of support trenches 20D upstream side, the parallel adjacent setting of coating liquid gathered trough 20E of channel form with support trenches 20D.Support component 20C and coating liquid gathered trough 20E are equivalent to the application roll supporting mechanism in the coating device of the present invention respectively and apply the liquid attachment mechanism.Middle layer forming liquid (forming liquid to call in the following text) forms liquid feed mechanism 22 and supplies to coating liquid gathered trough 20E from the intermediate layer, the formation liquid that overflows is attached on the application roll 20A.In the throughput direction A of support component 20C upstream side one side, in the formation liquid that overflows from coating liquid gathered trough 20E, be provided with recovery attached to the liquid flooding groove 20F on the application roll 20A.
As forming liquid, can use copolymerized polymer is dissolved in solution in the organic solvent.As organic solvent, also can use for example rudimentary ethanol class and rudimentary ketone, and their mixture etc.
Middle layer forming liquid supply unit (below, claim to form the liquid supply unit) 22 comprises a jar 22A, middle layer forming liquid feeding pipe (forming the liquid feeding pipe to call in the following text) 22B, middle layer forming liquid return pipeline (forming the liquid return pipeline to call in the following text) 22C; Jar 22A stores and supplies with coating liquid gathered trough 20E formation liquid; Form liquid feeding pipe 22B the formation liquid in the jar 22A is supplied to coating liquid gathered trough 20E; Forming liquid return pipeline (forming the liquid return pipeline to call in the following text) 22C turns back to the formation liquid in the liquid flooding groove 20F among jar 22A.
Forming on the liquid feeding pipe 22B flowmeter 22D that is provided with pump P and the formation liquid quantity delivered that flows through formation liquid feeding pipe 22B is measured.As flowmeter 22D, can the service property (quality) flowmeter, orifice flowmeter, effluent mouth flowmeter, Venturi meter, area flow meter, volumetric flowmeter, turbine instrument, ultrasonic type flowmeter, spiral vortex type flowmeter, also can use to be transformed into the flowmeter of the signal of telecommunication to liquid measure.
When coating formed liquid, the discharge capacity of pump P utilized the method for the rotating speed of control example such as pump P to control so that form liquid feeding pipe 22B to liquid measure and flow through the flow equivalent of the formation liquid that forms liquid return pipeline 22C.Control applies the liquid level of the formation liquid of liquid gathered trough 20E therefrom, so that coating liquid is attached on the application roll 20A.
Detecting rotational speed portion 24 has the rotating circular disk 24A that is fixed on application roll 20A one end, and the sensor 24B that detects the rotation of rotating circular disk 24A.The circumference of rotating circular disk 24A is provided with as shown in Figures 1 and 2 pivot is clipped in the middle and opposed a pair of protuberance 24A1, and sensor 24B is so-called Proximity Sensor, is configured in the below of protuberance 24A1.During rotating circular disk 24A rotation, the relative sensor 24B of protuberance 24A1 carries out the approaching action of secondary.Sensor 24B detects the static capacity variation of this moment, measures the rotating speed of rotating circular disk 24A, thereby can measure the rotating speed of application roll 20A.
Replace rotating circular disk 24A, also can use optical profile type rotary encoder or magnetic-type rotary encoder.
Drying device 4 is made with the box shape by the groove shape entrance and exit of PS version matrix W, and is arranged on the downstream of the throughput direction A of PS version matrix W.Be provided with four air that attract air in the drying device 4 and attract mouthfuls 42, and the gas concentration measuring device 40 to attracting organic vapor concentration such as methyl alcohol in mouthful exhaust that attracts to measure.Air attracts mouthful 42 places, four angles that are arranged near the courtyard face of drying device 4.
Gas concentration measuring device 40 is the device of catalytic combustion mode.
Roller coating equipment 100 can also have: the display part 62 of signal processing part 60 and demonstration signal processing part 60 testing results, wherein signal processing part 60 detects the coating abnormal conditions that PS version matrix W forms liquid according to the output signal of the gas concentration measuring device 40 of flowmeter 22D, the 24 sensor 24B of detecting rotational speed portion of applying device 2 and drying device 4.
Signal processing part 60 utilizes some parameters and has or not coating to exist following relation to detect coating between unusual unusual, said parameter comprise the rotating speed (to call application roll rotating speed r in the following text) that forms the application roll that forms liquid quantity delivered (to call feeding amount f in the following text), measures by sensor 24B among the liquid feeding pipe 22B measured by flowmeter 22D and the exhaust measured by gas concentration measuring device 40 in the concentration (to call the organic vapor concentration c in the following text) of organic vapor.
When giving liquid measure f low, the formation liquid quantity delivered of coating liquid gathered trough 20E reduces.On the other hand, the formation flow quantity that forms liquid return pipeline 22C is certain substantially, with irrelevant to the liquid measure size among the formation liquid feeding pipe 22B.Therefore, when reducing to liquid measure f, the liquid level of coating liquid gathered trough 20E reduces, and the formation liquid adhesion amount minimizing of application roll 20A can not apply fully on PS version matrix W and form liquid, produces coating unusually.
In addition, application roll 20A, by bearing the revolving force of PS version matrix W attached to lip-deep coating liquid, and driven the rotation will form liquid and be coated on the PS version matrix W.So when the coating liquid measure attached to application roll 20A surface reduced, because the revolving force of the PS version matrix W that application roll 20A bears weakens, application roll rotating speed r reduced.Therefore, also can detect coating unusually according to application roll rotating speed r.
In addition, when the appearance coating was unusual, owing to can reduce final vanishing because of the applied thickness that forms liquid, therefore, the result who reduces in drying device 4 inner organic solvent evaporation amounts made the reduction of organic vapor concentration c.
Like this, occurring under the unusual situation of coating, to having at least a meeting to reduce greatly in liquid measure f, application roll rotating speed r and the organic vapor concentration c.So,, just can detect coating unusually if detect at least one is lower than setting (controlling value) in liquid measure f, application roll rotating speed r and the organic vapor concentration c.In addition, the threshold value of controlling value as a reference value, is judged as when promptly being lower than its value to have produced and does not allow to wait coating unusual.Can adopt to any one experimental calculation value in liquid measure f, application roll rotating speed r and the organic vapor concentration c.
Fig. 4 shows a kind of formation of signal processing part 60.
As shown in Figure 5, signal processing part 60 has storage device 60B such as central calculation apparatus 60A and hard disk, it is unusual that wherein central calculation apparatus 60A detects coating according to the measured value of giving liquid measure f, application roll rotating speed r and organic vapor concentration c by flowmeter 22D, sensor 24B and 40 inputs of gas concentration measuring device, and its result is exported on display part 62; Storage device 60B then stores corresponding liquid measure f, application roll rotating speed r and each measured value of organic vapor concentration c of giving and reduces and each unusual main cause of generation coating.
As shown in Figure 4, the unusual main cause of storage device 60B storage coating, for example, storage constitutes the corresponding liquid measure f of giving and reduces and produce the unusual main cause of coating and have: (i) the rotating speed r of pump P reduces or stops, (ii) jar 22A sky, and (iii) form liquid feeding pipe 22B and come off, leak or shorten; The corresponding application roll rotating speed of the formation of storage r reduces and produces two unusual main causes of coating and be: produce loose contact between (1) PS version matrix W and the application roll 20A, and (2) application roll 20A produces wearing and tearing; The corresponding organic vapor concentration c of the formation of storage reduces and produces two unusual main causes of coating and be: the formation liquid of layer forming liquid supply unit 22 is supplied with badly (α), and (β) coating portion 20 produces bad coating.
The calculation apparatus 60A of central authorities detects coating unusually according to the aforementioned measured value of input and according to flow chart shown in Figure 5.That is, all when controlling value was above, display part 62 outputs applied the command signal that operation is normally carried out to the lithographic plate of PS version matrix W to any one in giving liquid measure f, application roll rotating speed r and organic vapor concentration c.
On the other hand, when any was lower than aforementioned controlling value in giving liquid measure f, application roll rotating speed r and organic vapor concentration c, as shown in Figure 5, display part 62 outputs detected the unusual command signal of coating.
When output has detected coating exceptional instructions signal, the calculation apparatus 60A of central authorities also reads correspondence from storage device 60B and gives which reduction liquid measure f, application roll rotating speed r and the organic vapor concentration c and apply unusual main cause, and in display part 62 outputs.
Display part 62 is in the aforementioned testing result that shows central calculation apparatus 60, not only demonstrate the unusual instruction of coating when unusual when central calculation apparatus 60A detects coating, also be shown to the unusual main cause of generation coating which value is lower than controlling value and is read by storage device 60B in liquid measure f, application roll rotating speed r and the organic vapor concentration c.For example, at being lower than controlling value for liquid measure f, detecting coating when unusual, display part 62 not only shows the instruction that coating is unusual, also be shown to liquid measure f and be lower than controlling value, the rotating speed that the unusual main cause of coating also show to take place is pump P reduces, middle layer forming liquid feeding pipe 22B comes off, leaks or shortens and jar 22A sky.
In addition, in signal processing part 60, detect under the unusual situation of generation coating, make the ring of buzzer or bell moving, both can learn and coating take place unusually, also can stop the conveying of PS version matrix W automatically.
Signal processing part 60 and display part 62 for example can be made of common desktop computer etc.
In roller coating equipment 100, when forming liquid for PS version matrix W coating, form the pump P starting of liquid feeding pipe 22B, the formation liquid among the jar 22A is supplied to coating liquid gathered trough 20E, make the surface attachment of application roll 20A form liquid.
Subsequently; keep PS version matrix W and carry with certain speed along throughput direction A; make facing downwards of anodic oxidation diaphragm one side that forms PS version matrix W, lowering or hoisting gear 10 rises brace table 6, and the formation liquid on application roll 20A surface is attached to below the PS version matrix W.The formation liquid on application roll 20A surface is attached to below the PS version matrix W time, application roll 20A, on PS version matrix W, drag and rotate by forming liquid, applying formation liquid continuously coating among the liquid gathered trough 20E below the PS version matrix W that extracts by application roll 20A.
In coating portion 20, applied the PS version matrix W that forms liquid and passed through from drying device 4, make the formation liquid drying that is coated on the PS version matrix W, form the intermediate layer.
Simultaneously, in flowmeter 22D, rotating speed instrumentation portion 24 and gas concentration measuring device 40, measure,, have or not coating unusual according to aforementioned measured value detection at signal processing part 60 to giving liquid measure f, application roll rotating speed r and organic vapor concentration c.And show that at display part 62 to have or not coating unusual and detect coating unusual main cause that takes place when unusual.
In roller coating equipment 100, aforesaid flowmeter 22D, rotating speed instrumentation portion 24 and gas concentration measuring device 40 are respectively to measuring for liquid measure f, application roll rotating speed r and organic vapor concentration c, and it is unusual to detect coating according to aforementioned measured value, even therefore PS version matrix W owing to reasons such as wind and vibration reach reach earthquake, it is unusual also can to detect coating reliably accurately.
Have, signal processing part 60 is detecting coating when unusual again, not only shows that at display part 62 to detect coating unusual, go back the main cause that display abnormality takes place, so the operator can implement countermeasure at an easy rate.
In addition, give liquid measure f, application roll rotating speed r and organic vapor concentration c, and utilize analysis to be easy to judge the unusual process that takes place of coating this result because METHOD FOR CONTINUOUS DETERMINATION has write down, therefore comparatively desirable.
Use the roller coating equipment of Figure 1 and Figure 2; controlling value is set for 0.7 liter/minute respectively to giving liquid measure f, application roll rotating speed r and organic vapor concentration c; 1000rpm; and 2%; carry out the coating of middle layer forming liquid with this; and visualization forms the PS version anodic oxidation protection face after the coating, and research has or not the unusual generation of coating when giving variations as shown in table 1 of liquid measure f, application roll rotating speed r and organic vapor concentration c.This result is illustrated in the table 1.
Table 1
| Controlling value | Just often | Condition 1 | Condition 2 | Condition 3 |
Give liquid measure f (rise/minute) | ????0.7 | ????0.8 | ????0.0 | ????0.8 | ????0.8 |
Application roll rotating speed r (rpm) | ???1000 | ???3249 | ???3249 | ????0 | ???3249 |
Organic vapor concentration c (%) | ????2 | ????3 | ????3 | ????3 | ????0 |
Have or not coating unusual (visual) | | Do not have | Have | Have | Have |
The coating abnormality detection result | | Do not have | Have | Have | Have |
As shown in table 1, by the regulation controlling value, can in roller coating equipment 100, detect coating reliably unusually.
In addition, in the present invention, as coated thing, specifiable flexible substrate with continuous band-shaped form includes: the lithographic plate matrix, lithographic printing original, the photographic film base material, sensitive paper barium monoxide paper, the audiotape base material, the used for tape base material, floppy disk is with base material etc., for example, the lithographic plate matrix has carried out anodized lithographic plate matrix to the aforementioned face of repairing after being meant finishing aluminium plate surface as required, and lithographic printing original is meant after forming photosensitive layer on trimmed of aforementioned lithographic plate matrix and as required with the lithographic printing original of aforementioned photosensitive layer surface delustering.
As coating liquid; the dry solution that forms diaphragm and use is example on the aforementioned coated thing to be coated in; specifically; except layer forming liquid in the middle of aforementioned; that can also enumerate has: be used for oxidation protection PS version photosensitive layer and form the polyvinyl alcohol water solution of anodic oxidation diaphragm; the photosensitive layer that is used to form PS version photosensitive layer forms solution; be used on photographic film, forming the photographic film emulsion colloidal solution of photosensitive layer; be used to form the sensitive paper emulsion colloidal solution of the photosensitive layer of sensitive paper, be used to form audiotape; the magnetospheric magnetic layer forming liquid of video-tape and floppy disk etc.
Be included in solvent in the aforementioned coating liquid and comprise methyl alcohol, ethanol, propyl alcohol, isopropyl alcohol, and the rudimentary ethanol class of butanols etc.; The rudimentary ketone of acetone, butanone, pentanone, dissident's ketone, methyl butyl ketone, methyl iso-butyl ketone (MIBK) etc.; Toluene, benzene, dimethylbenzene etc. aromatic hydrocarbon based; And the organic solvents such as aliphatic hydrocarbon of hexane, cyclohexane etc., in addition, also comprise water.
At coating liquid is under the situation of organic solvent solution, and aforementioned coating state method for monitoring can be for example catalytic combustion mode, diode mode and the solvent strength in the emission gases is measured by the gas concentration measuring device of infra red type diode mode etc.In addition, as aforementioned gas concentration measuring device, can use sample air diffusion diffusion way, by air exhauster attract the suction of sample air to attract mode and the pump suction mode that attracts by pump in any.
Aforementioned coating liquid is polyvinyl alcohol water solution or is under the situation of solution of main component with the polyvinyl alcohol water solution, because solvent mainly is a water, therefore, can be by solvent strength in the emission gases be measured in the water vapour amount measurement in the aforementioned emission gases.