CN1197659C - Lip coating type coating device - Google Patents
Lip coating type coating device Download PDFInfo
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- CN1197659C CN1197659C CN 00117936 CN00117936A CN1197659C CN 1197659 C CN1197659 C CN 1197659C CN 00117936 CN00117936 CN 00117936 CN 00117936 A CN00117936 A CN 00117936A CN 1197659 C CN1197659 C CN 1197659C
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- doctor edge
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Abstract
The present invention relates to a lip coating type coater which has the structure that a nozzle head provided with a doctor edge is arranged below a back up roll, and the nozzle head pressurizes and jets coating liquid to coat base materials which move from the front part to the back part of the nozzle head at the lower circumferential surface of the back up roll. The present invention is characterized in that a doctor edge whose longitudinal section is in a circular arc shape is arranged on the upper surface the nozzle head; a first liquid storage chamber is arranged in the width direction in the nozzle head, and a flow out way is arranged between the first liquid storage chamber and the upper surface of the nozzle head positioned in front of the doctor edge; a liquid storage wall is erected in front of the nozzle head, and gaps used for the base materials to move are kept in the liquid storage wall towards the lower circumferential surface of the back up roll; a second liquid storage chamber is formed by the lower circumferential surface of the back up roll, the liquid storage wall, the doctor edge and the upper surface of the nozzle head, wherein the second liquid storage chamber is enlarged in front of the outlet of the flow out way to form volume which is greater than the flow out way, and the volume is gradually reduced in approaching to the tip of the doctor edge whose longitudinal section is in a circular arc shape.
Description
Technical field
The present invention relates on strip base materials such as film, cloth, paper the applying device of coating masking liquid, particularly the configuration of the below of backing roll (BACK UP ROLL) have doctor edge (DOCTOR EDGE) nozzle head (NOZZLE HEAD), be coated to lip coating (LIP COATER) type applying device on the base material from this nozzle head pressurized jet masking liquid.
Background technology
Existing lip coating type coating device has following structure.
Promptly, in the side of masking liquid nozzle head, coating liquid flashboard with cover is installed, stream is more little to the top volume more from the masking liquid supply port of this masking liquid flashboard in the flashboard, the point of stream formation masking liquid accumulates portion in this flashboard, and the flow export of stream faces the slide connecting part of doctor edge and backing roll in the flashboard.
This applying device under the pressure of pump etc., is sent to the slide connecting part of doctor edge and backing roll with masking liquid, sets applied thickness by the gap of doctor edge and backing roll, base material is carried out the coating of masking liquid.
But, in the applying device of above-mentioned structure, to the masking liquid applied pressure, be the slide connecting part that is used for masking liquid is sent to doctor edge and backing roll, and, owing to attenuate near flowing out the road, so, sneak in the masking liquid and arrive above-mentioned slide connecting part along with the mobile air of base material, like this, exist the problem that in overlay, is mixed with air.Thereby overlay is inhomogeneous.
Summary of the invention
The invention provides a kind of air and do not sneak into the overlay of base material and the lip coating type coating device that can evenly apply.
The blade tip of the doctor edge of the lip coating type coating device of above-mentioned structure is only used machining, is processed at width to have linearity.But, can not get linearity completely with existing processing method, in addition, because the hydraulic problems of masking liquid, overlay also can not form straight line, produces little bending at width.
Therefore, when using this crooked doctor edge to apply, because its bending is different at each position with the gap between the backing roll, so overlay is inhomogeneous.
Especially when the overlay that is provided with as thin as a wafer, accurate overlay can not be set at this crooked width.
Therefore, lip coating type coating device provided by the invention can be regulated the bending of the width of doctor edge, is particularly suitable for being provided with overlay as thin as a wafer.
The lip coating type coating device of the present invention program's 1 record below backing roll, sets the nozzle head that has doctor edge, and with the masking liquid pressurized jet, the base material that side face under backing roll is rearward walked from shower nozzle the place ahead applies from nozzle head; It is characterized in that,
On nozzle head, be provided with the doctor edge of vertical section circular arc;
Along the width of nozzle head inside, be provided with the 1st fluid reservoir;
At the 1st fluid reservoir and between on the nozzle head in doctor edge the place ahead, be provided with and flow out the road;
The upright liquid storage wall of establishing in the front portion of nozzle head, this liquid storage wall is towards the following side face of backing roll and leave the gap of base material walking usefulness;
Above following side face, liquid storage wall, doctor edge and the nozzle head of backing roll, form the 2nd fluid reservoir;
The volume of above-mentioned the 2nd fluid reservoir is along with reducing near the doctor edge blade tip from flowing out the way outlet position.
The lip coating type coating device of the present invention program's 2 records is in the lip coating type coating device of claim 1 record, it is characterized in that,
In the 2nd fluid reservoir, be provided with pressure-detecting device;
Be provided with the liquid supplying device that is coated with to the 1st fluid reservoir force feed masking liquid;
Be provided with control device, this control device is according to the detected pressure signal of pressure-detecting device, and FEEDBACK CONTROL is coated with the pressure of the force feed masking liquid of liquid supplying device, makes the hydraulic coupling that is coated with in the 2nd fluid reservoir be higher than atmospheric pressure.
The lip coating type coating device of the present invention program's 3 records, be in the lip coating type coating device of claim 2 record, it is characterized in that, above-mentioned control device carries out FEEDBACK CONTROL, make the detected pressure of above-mentioned pressure-detecting device become the reference pressure value, set this reference pressure value, make masking liquid not produce overflow under the state that is full of the 2nd fluid reservoir from the gap between liquid storage wall and the backing roll.
The lip coating type coating device of the present invention program's 4 records is in the lip coating type coating device of claim 2 record, it is characterized in that above-mentioned pressure-detecting device is located on the above-mentioned liquid storage wall.
The lip coating type coating device of the present invention program's 5 records below backing roll, sets the nozzle head that has doctor edge,, is coated on the base material the masking liquid pressurized jet from nozzle head; It is characterized in that,
Under doctor edge on the nozzle head of quadrate part, width along nozzle head is provided with the slit, and the width along nozzle head leaves the connecting portion that nozzle head is not separated up and down, along the length direction in this slit the adjusting bolt of several perforations is set equally spaced, this regulates bolt and slit summary orthogonal;
By changing the degree of tightening of regulating bolt, make the blade tip of doctor edge moving up and down.
The lip coating type coating device of the present invention program's 6 records, by discharging nozzle, the doctor edge that is located at nozzle top and configuration that masking liquid uses above it and base material is constituted with the backing roll of predetermined speed of travel walking, exerting pressure from nozzle is ejected into masking liquid on the base material, applies; It is characterized in that being provided with:
Detect the speed of travel checkout gear of base material speed of travel V;
Whenever turn around and supply with the constant displacement pump of certain discharge rate masking liquid to nozzle;
The 1st control device, the 1st control device be according to the detected speed of travel V of speed of travel checkout gear, and the rotation number N of above-mentioned constant displacement pump is controlled to be
N＝(D×W×V)/(K1×Q)
(in the formula, D is the setting applied thickness (mm) that wets, and W is the setting application width (mm) of base material, and Q is the discharge rate that constant displacement pump is whenever goed around, and K1 is a constant.)
The lip coating type coating device of the present invention program's 7 records, by discharging nozzle, the doctor edge that is located at nozzle top and configuration that masking liquid uses above it and base material is constituted with the backing roll of predetermined speed of travel walking, exerting pressure from nozzle is ejected into masking liquid on the base material, applies; It is characterized in that being provided with:
Detect the speed of travel checkout gear of base material speed of travel V;
Whenever turn around and supply with the constant displacement pump of certain discharge rate masking liquid to nozzle;
Detect the applied thickness checkout gear of the average applied thickness Dp of base material width;
The 2nd control device, the 2nd control device be according to detected speed of travel V of speed of travel checkout gear and the detected average coating Dp of applied thickness checkout gear, and the rotation number N of above-mentioned constant displacement pump is controlled to be
N＝(Ds×V×K0)/Dp
(in the formula, Ds is the setting applied thickness that wets, and K0 is a constant).
The lip coating type coating device of the present invention program's 8 records, by discharging nozzle, the doctor edge that is located at nozzle top and configuration that masking liquid uses above it and base material is constituted with the backing roll of predetermined speed of travel walking, exerting pressure from nozzle is ejected into masking liquid on the base material, applies; It is characterized in that being provided with:
Be located at left part, the right part of nozzle bottom, the nozzle height of central portion is regulated the arrangement for adjusting height of usefulness;
Detect the gap detection device in the gap at left part, right part, 3 positions of central portion of doctor edge and backing roll at regular intervals;
Detecting each the regional portion applied thickness mean value that is divided into left part, right part, central portion along the base material width at regular intervals is the applied thickness checkout gear of average applied thickness DL (t), DC (t), DR (t);
The 3rd control device, the 3rd control device with K4 as the coating coefficient, from DL (t), DC (t), the DR (t) of applied thickness checkout gear input, calculate at regular intervals GL (t), GR (t), GC (t) with following three formulas according at regular intervals, this three formula is:
GL(t)＝GL(t-1)+{(DL(t)+DR(t))/2-DL(t)}×K4
GR(t)＝GR(t-1)+{(DL(t)+DR(t))/2-DR(t)}×K4
GC(t)＝GC(t-1)+{(DL(t)+DR(t))/2-DC(t)}×K4
3 arrangement for adjusting height of FEEDBACK CONTROL at regular intervals, make the gap between gap detection device detected doctor edge left side and the backing roll left side become the GL (t) that is calculated, make the gap between doctor edge right side and the backing roll right side become GR (t), make the gap between doctor edge central portion and the backing roll central portion become GC (t).
According to the lip coating type coating device of scheme 1, base material has been by being full of the 2nd fluid reservoir of masking liquid, and the doctor edge of walking makes masking liquid coated by the line pressure of doctor edge blade tip.At this moment, because the 2nd fluid reservoir enlarges in the place ahead of flowing out way outlet, form greater than the volume that flows out the road, so, can easily the 2nd fluid reservoir inside be remained and be higher than atmospheric reference pressure, like this, when base material is transported into the 2nd fluid reservoir when inner from the gap of liquid storage wall and backing roll, air is not invaded the 2nd fluid reservoir inside.
In addition, because doctor edge is a vertical section circular arc, the volume near blade tip the 2nd fluid reservoir diminishes gradually more, and the pressure that thereupon is added on the base material increases gradually.Therefore, the injection stream of the masking liquid that comes out along with the masking liquid stream of the mobile generation of base material with from the outflow way outlet that is positioned at doctor edge the place ahead becomes unidirectional cycle stream, can not become unsettled flowing.Like this, arrive on the substrate surface before the doctor edge, the amount of the masking liquid of entrained air not, do not change at width, even at the coating amount that width is coated on the base material.
Lip coating type coating device according to scheme 2, because be provided with pressure-detecting device at the 2nd fluid reservoir, so, according to the pressure signal of this pressure-detecting device, the pressure of the force feed masking liquid of masking liquid feedway can be regulated, atmospheric required interior the pressure can be kept above in the 2nd fluid reservoir.At this moment, from being coated with the masking liquid of liquid supplying device to the 1st fluid reservoir force feed, by narrow outflow road, its pressure is homogenized, in addition, the 2nd fluid reservoir is flowing out the expansion of way outlet the place ahead, forms bigger than the volume that flows out the road, so, can easily the 2nd fluid reservoir inside be remained and be higher than atmospheric pressure.
Lip coating type coating device according to scheme 3, be full of the state of the 2nd fluid reservoir and do not set reference pressure with masking liquid from the overflow ground, gap of liquid storage wall and backing roll, be feedback controlled to this reference pressure value in the 2nd fluid reservoir, like this, available certain coating pressure applies base material.
According to the lip coating type coating device of scheme 4, owing to pressure-detecting device is located on the liquid storage wall, so this checkout gear can easily be installed.
Lip coating type coating device according to scheme 5, tighten or relax the adjusting bolt of the doctor edge blade tip part of close bending, change is to the degree that screws togather in slit, regulate the size in slit, size variation by this slit makes the doctor edge blade tip moving up and down, regulate the bending of blade tip, make its broad ways become straight line.
In the lip coating type coating device of scheme 6, control with the 1st control device, the rotation number N of constant displacement pump is become
N＝(D×W×V)/(K1×Q)
Like this, can be from the constant displacement pump required masking liquid of setting applied thickness of weight feed base material often.Therefore, can often apply masking liquid to base material with identical applied thickness.
According to the applying device of scheme 7, by the rotation number N of the 2nd control device control constant displacement pump, (therefore Ds * V * K0)/Dp, can supply with the required masking liquid of applied thickness of base material quantitatively from constant displacement pump, and the applied thickness of base material is kept evenly to make this N become N=.
According to the applying device of scheme 8,, detect each the regional portion applied thickness mean value that is divided into central portion, left part, right part along the base material width at regular intervals by the applied thickness checkout gear.According to DL (t), the DC (t), the DR (t) that import at regular intervals from the applied thickness checkout gear, calculate each GL of fixing time (t), GR (t), GC (t) with following three formulas by calculation element, K4 is the coating coefficient.This three formula is:
GL(t)＝GL(t-1)+{(DL(t)+DR(t))/2-DL(t)}×K4
GR(t)＝GR(t-1)+{(DL(t)+DR(t))/2-DR(t)}×K4
GC(t)＝GC(t-1)+{(DL(t)+DR(t))/2-DC(t)}×K4
By 3 arrangement for adjusting height of the 3rd control device FEEDBACK CONTROL, make each gap of detected doctor edge of gap detection device and backing roll, become GL (t), GR (t), GC (t) that calculation element is calculated.Therefore, the both ends of backing roll and doctor edge and the gap of central portion are consistent with setting value, and like this, the applied thickness of base material is even.
Fig. 1 is the side view of the applying device of expression the present invention the 1st embodiment.
Fig. 2 is the amplification skiagraph of the applying device of the 1st embodiment.
Fig. 3 is the I-I line sectional drawing among Fig. 2.
Fig. 4 is the block diagram of applying device, microcomputer and the pump of the 1st embodiment.
Fig. 5 is the key diagram of control system of the applying device of expression the 2nd embodiment.
Fig. 6 is the stereogram of the applying device of the 2nd embodiment.
Fig. 7 is the plane of the applying device of the 2nd embodiment.
Fig. 8 is the applying device skiagraph of the 2nd embodiment.
Fig. 9 is the right hand view of the applying device of the 2nd embodiment.
Figure 10 is when controlling with 5 control systems of the 2nd embodiment, with the figure of its applied thickness graphical data.
Figure 11 is when not carrying out the control of the 2nd embodiment, with the figure of coating graphical data.
Figure 12 is when not carrying out the control of the 2nd embodiment, with the figure of coating graphical data.
Embodiment
(the 1st embodiment)
Below, referring to figs. 1 through Fig. 4 the 1st embodiment of the present invention is described.
Below, the operating state of the lip coating type coating device 10 of above-mentioned structure is described.
Go up the masking liquid thickness of coating toward base material F, by backing roll 12 and the gap of doctor edge 18 and the interior pressure decision of the 2nd fluid reservoir 32.
Base material F is walked in the gap of backing roll 12 and doctor edge 18.Masking liquid under pump 46 effect in the 1st fluid reservoir 26 towards the width diffusion of nozzle head 14, be ejected into the 2nd fluid reservoir 32 inside equably from the outlet 28a that flows out road 28, the inside of the 2nd fluid reservoir 32 is remained certain pressure (below be called reference pressure).This reference pressure is set at and makes masking liquid be full of the state of the 2nd fluid reservoir 32 and not overflow from the gap of 12 of liquid storage wall 30 and backing rolls.
Base material F has been by being full of the 2nd fluid reservoir 32 of masking liquid, and the doctor edge 18 of walking, masking liquid are by the line pressure of the blade tip of doctor edge 18 and coated.At this moment, since masking liquid by narrow outflow road 28, so the pressure of masking liquid is even, in addition, because the 2nd fluid reservoir 32 is bigger than the volume that flows out road 28 flowing out outlet 28a the place ahead expansion on road 28, so, can be easily the inside of the 2nd fluid reservoir 32 be remained and is higher than atmospheric reference pressure.Like this, be transported into the 2nd fluid reservoir 32 from the gap of liquid storage wall 30 and backing roll 12 when inner at base material F, air is not invaded the 2nd fluid reservoir 32 inside, so do not produce bubble on overlay.
In addition, because doctor edge 18 is comma shapes, so near the blade tip of doctor edge, the volume of the 2nd fluid reservoir 32 diminishes gradually more, the pressure that thereupon acts on the base material F increases gradually, regulates by pressure, and masking liquid is not overflowed to outside the 2nd fluid reservoir 32.Therefore, the masking liquid stream A that produces along with moving of base material F and from the masking liquid injection stream B of the outlet 28a that flows out road 28 becomes equidirectional cycle stream C, and can not form becomes unsettled flowing.Like this, the lip-deep liquid measure that is coated with of base material F before arriving doctor edge 18 does not change at width, and the overlay that forms on base material F is even at width.
Below, the interior pressure of the 2nd fluid reservoir 32 is remained on the state of reference pressure with reference to the block diagram illustrations of Fig. 4.
When because the rotation of pump is inhomogeneous or external causes such as the viscosity variation of masking liquid, variations in temperature, make the 2nd fluid reservoir 32 in press and be raised to reference pressure when above, from the pressure signal AS of pressure gauge 50, interior pressure this signal that risen is passed to microcomputer 48.Microcomputer 48 reduces the masking liquid pressurization pressure of pump 46 by actuating signal DS.When the pressure of masking liquid reduced, the internal drop of the 2nd fluid reservoir 32 was low, becomes original pressure.Otherwise, drop to when being lower than reference pressure when depressing in the 2nd fluid reservoir 32, microcomputer 48 improves the masking liquid pressurization pressure of pumps 46, make the 2nd fluid reservoir 32 in press liter.
When nozzle head 14 broad ways deflections, the central portion that the cylinder 42 of holding member 40 makes nozzle head 14 to displacement, is revised its deflection towards upper and lower.In addition, in the present embodiment, holding member 40 is that the central portion at nozzle head 14 is provided with 1, but is not limited to this, also several can be set.
The blade tip of doctor edge 18 can only form with machining.But, can not get linearity completely with existing processing method, can produce little bending at width.For this reason, by tightening or relaxing near crooked doctor edge 18 blade tips adjusting bolt 38 partly, change is to the elasticity that screws togather in slit 36, regulate the size in slit 36, the variation of the size by this slit 36, the blade tip that makes doctor edge is toward each moves 2～3 μ m up and down, and the bending of fine adjustment blade tip makes it be bordering on straight line.In addition, the size of this bending and the variable quantity of adjusting are measured the applied thickness of coated substrate F with apparatus for measuring thickness 52 and are carried out, so the hydraulic pressure of masking liquid itself also can be revised bending.As mentioned above, because the blade tip of doctor edge 18 can be towards up and down with the amplitude adjusted of 2～3 μ m, so, can form thinner overlay than 2 μ m.
After from the beginning lid 22 unloaded on the body 16, because the front 16a of a body 16 forms smooth face, so cleaning is attached to masking liquid on the 16a of front and foreign material etc. easily.
When making the wide variety of the lid 22 that is installed on the body 16, flow out the wide variety of the outlet 28a on road 28, the application width of base material F is changed.
In addition, slide at width, make the wide variety of the outlet 28a that flows out road 28, the application width of base material F is changed by making next door 34.For example, application width is L under the situation of Fig. 3.
(the 2nd embodiment)
Below, with reference to Fig. 5 to Figure 12 the 2nd embodiment of the present invention is described.
Mark 122 is masking liquid outlets that broad ways is extended on nozzle 116.This masking liquid outlet 122 is connected with the top of masking liquid storage portion 118 by masking liquid path 124 in its underpart, is pressed to the masking liquid of masking liquid storage portion 118, is coated on the base material F from this masking liquid outlet 122.
Mark 126 is formed in the holding plate of masking liquid outlet 122 front portions.The side face of the upper end of this holding plate 126 and B roller 112 almost joins, and the interval of this B roller 112 and holding plate 126 upper ends is redefined for the degree that base material F can pass through.
Mark 128 is provided in a side of the doctor edge 128 at masking liquid outlet 122 rear portions.The interval of the upper end of this doctor edge 128 and B roller 112 side faces is redefined for the degree that base material F just can pass through.In addition, the space that surrounds by the side face of holding plate 126, doctor edge 128 and B roller 112, basically by obturation, when discharging masking liquid its pressure inside with outside gas different.Mark 130 is the pressure-detecting devices that detect the masking liquid hydraulic pressure of this masking liquid outlet 122.This pressure-detecting device 130 is made of semiconductor transducer, is located on the holding plate 126.
The magnetic displacement instrumentation that mark 138 is provided in a side of support 136 bottoms is magnetic scale (trade name) with scale.This magnetic scale 138 can detect the displacement of nozzle 116 central portions.Like this, but the gap between instrumentation doctor edge 128 and B roller 112 central portions.
Mark 148 is magnetic scales, is used for the gap of instrumentation B roller 112 and nozzle 116.
This control device 158 has 5 following control systems, these 5 applied thickness that control system all is used to regulate base material F.These control systems below are described in order.
The 1st control system is described earlier.
The applying device 110 of present embodiment, be on one side to masking liquid pressurization on one side it is ejected from nozzle 116, the mode that base material F is applied is so its applied thickness is by the discharge rate decision of constant displacement pump 150.That is, the unit interval discharge rate of this constant displacement pump 150 is by the amassing of the speed of travel and application width and applied thickness, be the volume decision of coating amount.In addition, applied thickness at this moment is the applied thickness of wet condition.The masking liquid discharge rate of unit interval is by the revolution decision of constant displacement pump 150.
Therefore, the revolution N (rpm) of constant displacement pump 150 determines with (1) formula.
N＝(D×W×V)/(K1×Q) ……(1)
In the formula, D is the applied thickness (mm) that wets, and W is application width (mm), and V is the speed of travel (a m/ branch), and Q is the discharge rate (cc/REV) that constant displacement pump 150 is goed around, and K1 is a constant.
If Q then can think constant, so (1) formula becomes by the pump form decision of constant displacement pump 150
N＝(D×W×V)/K2 ……(2)
In the formula, K2=K1 * Q.
Therefore, wet applied thickness D and application width W input control device 158, when the speed of travel V of B roller 112 was passed through A/D converter input control device 158, the rotation of control device 158 control constant displacement pumps 150 made it become the pump rotation number N that usefulness (2) formula is obtained with motor 152.
Like this, the rotation number of constant displacement pump 150 is automatically followed the variation of speed of travel V, can be with identical applied thickness and identical application width coating masking liquid.
The following describes the 2nd control system.
In the coating operation, consider that applied thickness and application width do not change, so applied thickness D in (2) formula and application width W can think constant.Therefore, (2) formula can be expressed as (3) formula.
N＝K3×V ……(3)
In the formula, K3=D * W/K2 ... (3 ')
Though above-mentioned K3 comprises applied thickness D, owing to applied thickness D changes sometimes, so, measure its mean value Dp with 156 pairs of whole applied thickness of applied thickness checkout gear, be necessary this change of reflection in K3.For this reason, from the viewpoint different with (3 ') formula, promptly only from applied thickness, K3 becomes following formula (4).
K3＝Ds/Dp×K0 ……(4)
In the formula, Ds sets applied thickness, and K0 is a constant.
K3 substitution (3) formula of obtaining with (4) formula, like this, the revolution of the constant displacement pump 150 corresponding with setting applied thickness as the formula (5).
N＝(Ds×V×K0)/Dp ……(5)
Like this, the rotation number of constant displacement pump 150 is automatically followed the variation of speed of travel V, can carry out the coating of masking liquid with identical application width with identical applied thickness.
Below, illustrate that the hydraulic pressure with masking liquid remains the control system of appropriate value.
Lip coating type coating device 110 is characterised in that its air-tightness.In order to keep this air-tightness, must suitably keep the hydraulic pressure of nozzle 116 inside.But this hydraulic pressure rocks because of the direction of principal axis of B roller 112 or the variation of the speed of travel produces big variation.Therefore, for B roller 112 rock or the speed of travel also can remain appropriate value with hydraulic pressure when changing, carry out following control.
In allowing the scope that hydraulic pressure suitably changes, set feasible value, in the higher limit of this feasible value and lower limit input control device 158, store in advance.In the coating operation of applying device 110, detect its hydraulic pressure with pressure-detecting device 130.
During upper limit hydraulic pressure value that this detected hydraulic pressure surpass to be set, with height governor motor 142,144 with the gap of nozzle 116 upper ends with a certain amount of and expand equably and open, reduce the hydraulic pressure value of detection.When detected hydraulic pressure value was lower than the lower limit hydraulic pressure value of setting, the gap that makes nozzle 110 two ends with arrangement for adjusting height 142,144 rose the hydraulic pressure value of nozzle 110 inside with a certain amount of and narrow down equably.
By above-mentioned control, the hydraulic pressure value of nozzle 110 inside is always remained in the permissible range, so applied thickness does not change.
The following describes the control system in the applied thickness gap of revising base material F width.
In this control system, with highly regulating the gap of regulating 112 on doctor edges 128 and B roller with motor 142,144,134, the gap of the applied thickness of correction base material F width.
The numerical value input control device 158 of the gap at nozzle 110 two ends and central space, in order to make magnetic scale 138,146,148 detected gap widths consistent with the setting value of above-mentioned input, control device 158 is regulated highly and is regulated with motor 142,144,134, makes setting value consistent with detected gap.
Like this, the gap of the applied thickness of the width of base material F coincide with setting value, and the applied thickness of width does not change.
The following describes the 3rd control system.
The 3rd control system also with above-mentioned control system similarly, the applied thickness of the width of control base material F, use applied thickness checkout gear 156 to control.
Each average applied thickness by applied thickness checkout gear 156 detected 7 regional portions, from nozzle left side as D1 (t), D2 (t) ... D7 (t) is stored in the control device 158.
D1 (t), D2 (t) according to input at regular intervals ... D7 (t), control device 158 carries out the calculating of (6)～(8) formula, asks on the left of the doctor edge and the clearance G C (t) of clearance G R (t), doctor edge central portion and the backing roll central portion on clearance G L (t), doctor edge right side and backing roll right side on the left of the backing roll.
GL(t)＝GL(t-1)+{(D2(t)+D6(t))/2-D2(t)}×K4 ……(6)
GR(t)＝GR(t-1)+{(D2(t)+D6(t))/2-D6(t)}×K4 ……(7)
GC(t)＝GC(t-1)+{(D2(t)+D6(t))/2-D4(t)}×K4 ……(8)
In the formula, GL (t-1), GR (t-1), GC (t-1) are the gaps of certain hour preceding doctor edge that usefulness (6)～(8) formula is obtained 128 and B roller 112.K4 is the coating coefficient.
Wherein, DL (t), DC (t), DR (t) are D2 (t), D4 (t), D6 (t).
In order to make magnetic scale 138,146,148 detected gaps become GL (t), GR (t), GC (t), control device 158 each use of fixing time are highly regulated with motor 142,144,134, revise the gap of doctor edge 128 and B roller 112.
Like this, the applied thickness of the width of base material F is controlled, does not produce the inhomogeneous of applied thickness.
The applied thickness of base material is by above-mentioned 5 control systems control, so can accomplish the even coating do not accomplished before.
Figure 10 is to use 5 control systems of present embodiment, with the patterned figure of the applied thickness of base material.
Figure 11 and Figure 12 are the control systems that does not adopt present embodiment, with the figure of graphical data of coating.
Z axle among Figure 10 to Figure 12 is represented applied thickness, and X-axis is represented the length direction of base material, and Y-axis is represented the width of base material.
Relatively these 3 accompanying drawings as can be known, the applied thickness of Figure 10 total energy keeps average applied thickness, and among Figure 11 and Figure 12, owing to do not adopt the control system of present embodiment, applied thickness is inhomogeneous.
The lip coating type coating device of scheme 1 record, base material be by being full of the 2nd fluid reservoir of masking liquid, and the doctor edge of walking makes masking liquid coated by the line pressure of doctor edge blade tip.At this moment, because the 2nd fluid reservoir enlarges in the place ahead of flowing out way outlet, form greater than the volume that flows out the road, so, can easily the 2nd fluid reservoir inside be remained and be higher than atmospheric reference pressure, like this, when base material is transported into the 2nd fluid reservoir when inner from the gap of liquid storage wall and backing roll, air is not invaded the 2nd fluid reservoir inside, like this, does not produce bubble on the overlay of base material.
In addition, because doctor edge is a vertical section circular arc, the volume near blade tip the 2nd fluid reservoir diminishes gradually more, and the pressure that thereupon is added on the base material increases gradually.Therefore, the injection stream of the masking liquid that comes out along with the masking liquid stream of the mobile generation of base material with from the outflow way outlet that is positioned at doctor edge the place ahead becomes unidirectional cycle stream, can not become unsettled flowing.Like this, be on the substrate surface before the doctor edge, the amount of the masking liquid of entrained air not, do not change at width, the coating amount that broad ways is coated on the base material is even.In addition, at this moment, owing on the outflow road of volume less than the 2nd fluid reservoir, be coated on the base material after the pressure of masking liquid is homogenized, so, can apply more equably.
The lip coating type coating device of scheme 2 records, because be provided with pressure-detecting device at the 2nd fluid reservoir, so, according to the pressure signal of this pressure-detecting device, can regulate the pressure of masking liquid feed mechanism force feed masking liquid, total energy keeps required interior pressure in the 2nd fluid reservoir.At this moment, from the masking liquid of masking liquid feed mechanism to the 1st fluid reservoir force feed, by narrow outflow road, its pressure is homogenized, in addition, the 2nd fluid reservoir is flowing out the expansion of way outlet the place ahead, forms bigger than the volume that flows out the road, so, can easily the 2nd fluid reservoir inside be remained and be higher than atmospheric pressure.Therefore, pressure-detecting device is set, can easily carries out pressure and regulate in this position.
The lip coating type coating device of scheme 3 records, be full of the state of the 2nd fluid reservoir and do not set reference pressure with masking liquid from the overflow ground, gap of liquid storage wall and backing roll, be feedback controlled to this reference pressure value in the 2nd fluid reservoir, like this, available certain coating pressure applies base material.
The lip coating type coating device of scheme 4 records is owing to pressure-detecting device is located on the liquid storage wall, so this checkout gear can easily be installed.
The lip coating type coating device of scheme 5 records makes the blade tip of doctor edge moving up and down with the adjusting bolt, regulates the bending of blade tip, makes its broad ways become straight line.Like this, bending is corrected, and does not produce inhomogeneous on overlay.Because the blade tip of doctor edge is a linearity, so, be particularly suitable for being provided with the overlay as thin as a wafer of sheet material etc.
The lip coating type coating device of operational version 6 records can keep uniform applied thickness.Especially the rotation number of constant displacement pump can automatically be followed the variation of the speed of travel, keeps identical applied thickness and identical application width.
In the applying device of scheme 7 records, the rotation number of constant displacement pump also can be followed the variation of the speed of travel, often keeps identical applied thickness and identical application width.
In the applying device of scheme 8 records, the applied thickness of the width of control base material, applied thickness is even.
Claims (8)
1. lip coating type coating device below backing roll, sets the nozzle head with doctor edge, and with the masking liquid pressurized jet, the base material that side face under backing roll is rearward walked from shower nozzle the place ahead applies from described nozzle head; It is characterized in that,
On nozzle head, be provided with the doctor edge that vertical section is a circular arc;
Along the width of nozzle head inside, be provided with the 1st fluid reservoir;
At the 1st fluid reservoir and between on the nozzle head in doctor edge the place ahead, be provided with and flow out the road;
The upright liquid storage wall of establishing in the front portion of nozzle head, this liquid storage wall is towards the following side face of backing roll and leave the gap of base material walking usefulness;
Above following side face, liquid storage wall, doctor edge and the nozzle head of backing roll, form the 2nd fluid reservoir;
The volume of above-mentioned the 2nd fluid reservoir is along with reducing near described doctor edge blade tip from flowing out the way outlet position.
2. lip coating type coating device as claimed in claim 1 is characterized in that,
In described the 2nd fluid reservoir, be provided with pressure-detecting device;
Be provided with the liquid supplying device that is coated with to the 1st fluid reservoir force feed masking liquid;
Be provided with control device, this control device is according to the detected pressure signal of pressure-detecting device, and FEEDBACK CONTROL is coated with the pressure of the force feed masking liquid of liquid supplying device, makes the hydraulic coupling that is coated with in the 2nd fluid reservoir be higher than atmospheric pressure.
3. lip coating type coating device as claimed in claim 2 is characterized in that above-mentioned control device carries out FEEDBACK CONTROL, makes the detected pressure of above-mentioned pressure-detecting device become the reference pressure value; Set this reference pressure value, make masking liquid not produce overflow under the state that is full of the 2nd fluid reservoir from the gap between liquid storage wall and the backing roll.
4. lip coating type coating device as claimed in claim 2 is characterized in that, above-mentioned pressure-detecting device is located on the above-mentioned liquid storage wall.
5. lip coating type coating device as claimed in claim 1 is characterized in that,
Under doctor edge on the nozzle head of quadrate part, width along described nozzle head is provided with the slit, and the width along nozzle head leaves the connecting portion that nozzle head is not separated up and down, along the length direction in this slit the adjusting bolt of a plurality of perforations is set equally spaced, this regulates bolt and slit orthogonal;
By changing the degree of tightening of regulating bolt, make the blade tip of doctor edge moving up and down.
6. lip coating type coating device as claimed in claim 1 is characterized in that being provided with:
Detect the speed of travel checkout gear of base material speed of travel V;
Whenever turn around and supply with the constant displacement pump of certain discharge rate masking liquid to nozzle;
The 1st control device, the 1st control device be according to the detected speed of travel V of speed of travel checkout gear, and the rotation number N of above-mentioned constant displacement pump is controlled to be
N＝(D×W×V)/(K1×Q)
In the formula, D is the setting applied thickness that wets, and W is the setting application width of base material, and Q is the discharge rate that constant displacement pump is whenever goed around, and K1 is a constant.
7. lip coating type coating device as claimed in claim 1 is characterized in that being provided with:
Detect the speed of travel checkout gear of base material speed of travel V;
Whenever turn around and supply with the constant displacement pump of certain discharge rate masking liquid to nozzle;
Detect the applied thickness checkout gear of the average applied thickness Dp of base material width;
The 2nd control device, the 2nd control device be according to detected speed of travel V of speed of travel checkout gear and the detected average applied thickness Dp of applied thickness checkout gear, and the rotation number N of above-mentioned constant displacement pump is controlled to be
N＝(Ds×V×K0)/Dp
In the formula, Ds is the setting applied thickness that wets, and K0 is a constant.
8. lip coating type coating device as claimed in claim 1 is characterized in that being provided with:
Be located at left part, right part, arrangement for adjusting height central portion, that be used to regulate nozzle height of nozzle bottom;
Detect doctor edge and backing roll gap detection device at regular intervals in the gap at left part, right part, 3 positions of central portion;
Detecting each the regional portion applied thickness mean value that is divided into left part, right part, central portion along the base material width at regular intervals is the applied thickness checkout gear of average applied thickness DL (t), DC (t), DR (t);
The 3rd control device, the 3rd control device with K4 as the coating coefficient, from DL (t), DC (t), the DR (t) of applied thickness checkout gear input, calculate at regular intervals GL (t), GR (t), GC (t) with following three formulas according at regular intervals, this three formula is:
GL(t)＝GL(t-1)+{(DL(t)+DR(t))/2-DL(t)}×K4
GR(t)＝GR(t-1)+{(DL(t)+DR(t))/2-DR(t)}×K4
GC(t)＝GC(t-1)+{(DL(t)+DR(t))/2-DC(t)}×K4
3 arrangement for adjusting height of FEEDBACK CONTROL at regular intervals, make the gap between gap detection device detected doctor edge left side and the backing roll left side become the described GL that calculates (t), make the gap between doctor edge right side and the backing roll right side become GR (t), make the gap between doctor edge central portion and the backing roll central portion become GC (t).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00117936 CN1197659C (en) | 2000-06-01 | 2000-06-01 | Lip coating type coating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00117936 CN1197659C (en) | 2000-06-01 | 2000-06-01 | Lip coating type coating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1326715A CN1326715A (en) | 2001-12-19 |
| CN1197659C true CN1197659C (en) | 2005-04-20 |
Family
ID=4587091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00117936 Expired - Lifetime CN1197659C (en) | 2000-06-01 | 2000-06-01 | Lip coating type coating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1197659C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5103553B1 (en) * | 2011-06-24 | 2012-12-19 | 日東電工株式会社 | Rare earth permanent magnet and method for producing rare earth permanent magnet |
| IT201600078681A1 (en) | 2016-07-27 | 2018-01-27 | Ms Printing Solutions S R L | PRINTING PLANT OF FIBER MATERIAL IN SHEET AND PROCEDURE OF PRINTING OF THE FIBER MATERIAL IN SHEET. |
| CN107051830A (en) * | 2017-05-12 | 2017-08-18 | 成都市惠家胶粘制品有限公司 | Adhesive tape coating thickness control system |
| CN114433422A (en) * | 2022-02-23 | 2022-05-06 | 深圳市曼恩斯特科技股份有限公司 | Coating die head and coating device |
-
2000
- 2000-06-01 CN CN 00117936 patent/CN1197659C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1326715A (en) | 2001-12-19 |
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