CN108534689A - A kind of leaching roller coating cloth coating layer thickness online test method and its detection platform - Google Patents
A kind of leaching roller coating cloth coating layer thickness online test method and its detection platform Download PDFInfo
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- CN108534689A CN108534689A CN201810285736.6A CN201810285736A CN108534689A CN 108534689 A CN108534689 A CN 108534689A CN 201810285736 A CN201810285736 A CN 201810285736A CN 108534689 A CN108534689 A CN 108534689A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0616—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating
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Abstract
The present invention relates to a kind of leaching roller coating cloth coating layer thickness on-line checking platform and its detection methods, real-time online can be carried out to leaching roller coating cloth coating layer thickness to detect and control, shooting the apparatus for coating by vision module, coating fluid is immersed roller and is formed by the second meniscus through soaking the roller gap location between roller and back flow roll from being taken up to be formed by the first meniscus and coating fluid and be immersed roller strap in coatings tank in the process of running, mathematical modeling is carried out to the first meniscus and the second meniscus and its relevant region, and the relevant derivation of equation is carried out on the basis of modeling, go out coating layer thickness by the formula and correlation data calculation derived, if calculated coating layer thickness does not meet preset thickness, then control the setting related to roll clearance adjusting mechanism of adjustment apparatus for coating, re-start shooting Modeling Calculation.
Description
Technical field
The present invention relates to coating art more particularly to a kind of leaching roller coating cloth coating layer thickness online test method and its inspections
Survey platform.
Background technology
Coating is a kind of technique being coated in adhesive on the base material continuously run, and solvent-free coatable is solid using 100%
A kind of method that the adhesive of content is coated is a kind of technique to obtain coating as final purpose, and also known as response type is multiple
It closes.Solvent-free coatable complex technique is a kind of environmentally friendly, economic flexible package composite material production technology, is had apparent economical
Property, safety and the advantage in environmental protection, it has also become a kind of important processing method of package compound film.With me
The continuous improvement of state's environmental consciousness and enterprise reduce production cost requirement under, solvent-free combination process is soft in China in recent years
Swift and violent developing state is presented in packaging industry.
Solvent-free coatable coating is the research emphasis of solvent-free coatable, and the thickness of coating fluid is concentrated mainly on to the research of coating
In the defect of degree and coating.Coating, which is that roller strap is dynamic, is coated with liquid movement and finally by coating liquid process on base material, coating
The thickness of liquid is generated with this process, thickness and the coating roller diameter of coating fluid, roller gap, roller speed, adhesive characteristic etc.
Relationship is all the research emphasis of domestic and international solvent-free coatable technology all the time.Holiday be influence coating quality it is important because
The defect of element, coating is mainly vertical bar road, flies ink, bubble, uniformity etc., in the generation and coating process of studying holiday
Relationship between controllable parameter is the important content of solvent-free coatable Study of Defects.
Although solvent-free coatable technique has significant energy-saving and environment-friendly advantage, 90% or more the country is compound at present
Film manufacturer all or using solvent type adhesive produces, and there is no use solvent-free coatable technique, domestic basis on a large scale
The opposite shortage of theoretical research and falling behind relatively for basic industries so that the difference of the development and foreign countries of domestic solvent-free coatable technology
Away from apparent.Domestic production producer is faced with the design method of many bottlenecks, especially product in terms of the upgrading of product,
Major part lacks the Design Thinking of rigorous scientific theory, advanced design concept and innovation to refer to based on engineering experience
It leads.
Invention content
Problem to be solved by this invention is to provide a kind of leaching roller coating cloth coating layer thickness online test method and its detection is flat
Platform, this leaching roller coating cloth coating layer thickness online test method and its detection platform can carry out leaching roller coating cloth coating layer thickness real-time
On-line checking and control.The technical solution of use is as follows：
A kind of leaching roller coating cloth coating layer thickness online test method, it is characterised in that include the following steps successively：
（1）Coating fluid of the selection for coating, obtains the physical parameter of coating fluid：Fluid density ρ, surface tension of liquid σ, fluid
Pressure p, rheological coefficient n and consistency coefficient k；
（2）Adjust the roller gap of leaching roller and back flow roll by roll clearance adjusting mechanism, and run leaching roller and back flow roll, obtain leaching roller and
The relevant parameter of back flow roll：Soak roller radius R1, back flow roll radius R2, leaching roller and back flow roll between most pony roll gap H0, leaching roller linear velocity u1
With back flow roll linear velocity u2；
（3）Shooting apparatus for coating by vision module, coating fluid is immersed roller and is taken up and to be formed from coatings tank in the process of running
The first meniscus and coating fluid be formed by the second meniscus through soaking the roller gap location between roller and back flow roll in leaching roller strap；
（4）To step（3）Captured the first meniscus, the second meniscus carry out mathematical modeling respectively, are surveyed by mathematical model
Measure the radius r of the first meniscus1, in coatings tank coating liquid level and roller tangent line and vertical direction at the contact point for soaking roller folder
The radius r of angle α, the second meniscus2And the second shortest distance x between meniscus and most pony roll gapc；
（5）Invocation step（1）（2）（4）Gained relevant parameter, and calculate according to the mathematical model established the coating on back flow roll
Thickness；
（6）Judgment step（5）Whether the coating layer thickness being calculated meets preset thickness requirement, if do not met, holds again
Row step（2）To step（5）, until the coating layer thickness on back flow roll meets preset thickness requirement.
As the preferred embodiment of the present invention, the step（4）In the mathematical modeling of the first meniscus be：With coating fluid level
Face and the intersection point of leaching roller roll surface are origin, establish coordinate system as x-axis to soak roller rotary speed direction；The step（4）In it is second curved
The mathematical modeling of lunar surface is：Using straight line where the distance of center circle of leaching roller and back flow roll in same vertical plane as y-axis, with y-axis and leaching roller roller
The intersection point in face establishes coordinate system for origin.By establishing above-mentioned two coordinate system, the radius of the first meniscus can be directly measured
r1, coating liquid level and the angle α of roller tangent line and vertical direction at the contact point for soaking roller, the radius of the second meniscus in coatings tank
r2And the second shortest distance x between meniscus and most pony roll gapc。
As the further preferred embodiment of the present invention, step（5）Coating layer thickness h on middle back flow roll2Joined by following formula
It is vertical to can be calculated：
、
,
Wherein
；
In above-mentioned each parameter：ρ is the fluid density of coating fluid, and σ is the surface tension of liquid of coating fluid, and p is the fluid of coating fluid
Pressure, n are the rheological coefficient of coating fluid, and k is the consistency coefficient of coating fluid, passes through step（1）It is directly measured by existing equipment；
R1To soak roller radius, R2For back flow roll radius, H0For the most pony roll gap between leaching roller and back flow roll, u1To soak roller linear velocity, u2For the back of the body
Roller linear velocity, R1、R2For roller own dimensions, H0It is measured after adjusting setting by roll clearance adjusting mechanism, u1、u2By soaking roller and the back of the body
It is measured after the corresponding driving device setting of roller；r2For the radius of second meniscus, xcFor the second meniscus and most pony roll gap
Between the shortest distance, r2And xcPass through step（4）It is calculated.
As further preferred embodiments of the present invention, the step（6）In if step（5）Calculated coating layer thickness
Preset thickness is not met, step is re-executed（2）When, change leaching roller linear velocity u1, back flow roll linear velocity u2Or between leaching roller and back flow roll
Most pony roll gap H0In at least one of numerical value.
A kind of leaching roller coating cloth coating layer thickness on-line checking platform, including apparatus for coating and roll clearance adjusting mechanism, feature
It is：Further include vision module, thickness measure control module and data acquisition module；Vision module is arranged for shooting the painting
It sets coating fluid in the process of running and is immersed roller and is taken up from coatings tank and be formed by the first meniscus and coating fluid and passed through by band
Roller gap location between leaching roller and back flow roll is formed by the second meniscus；Apparatus for coating respectively with thickness measure control module sum number
It is electrically connected according to acquisition module, vision module is electrically connected with thickness measure control module, and thickness measure control module is acquired with data
Module is electrically connected.
Above-mentioned apparatus for coating is electrically connected with thickness measure control module and data acquisition module respectively, makes data acquisition module
It can be to each relevant parameter of apparatus for coating（Including soaking roller radius R1, back flow roll radius R2, leaching roller and back flow roll between most pony roll
Gap H0, leaching roller linear velocity u1With back flow roll linear velocity u2）It is acquired storage, thickness measure control module is then defeated to apparatus for coating
Go out to control signal and be controlled.
Above-mentioned vision module is electrically connected with thickness measure control module, and vision module is by the first meniscus taken and
The photo of two meniscus is sent to thickness measure control module and measures calculating.
Above-mentioned thickness measure control module is electrically connected with data acquisition module, and thickness measure control module can be adopted from data
Collect and read data needed for correlation in module, or will be in the data that be calculated storage to data acquisition module.
As the present invention preferred embodiment, the apparatus for coating include coatings tank, leaching roller, back flow roll, leaching roll driving apparatus and
Back flow roll driving device, coatings tank are made of transparent material；It soaks roller to be mounted on the power output end of leaching roll driving apparatus, back flow roll
It is connected on the power output end of back flow roll driving device and with roll clearance adjusting mechanism, leaching roller is corresponding up and down with back flow roll
Setting, the lower part for soaking roller is immersed in coatings tank.Roll driving apparatus and the driving of back flow roll driving device generally use motor are soaked, leaching roller drives
The control signal of dynamic motor and back flow roll driving motor is electrically connected with the control output end of thickness measure control module.Coatings tank
Generally use transparent material is made, and vision module is facilitated to shoot the submergence part for soaking roller.
Above-mentioned roll clearance adjusting mechanism is used to adjust the most pony roll gap between leaching roller and back flow roll, and essence is adjusted in order to improve
Degree, can be used the structure that eccentric worm gear matches driving with worm screw, and the roll shaft of back flow roll is mounted in the eccentric orfice of eccentric worm gear, leads to
It receives and distributes dynamic rotary worm and drives worm gear rotation.
Above-mentioned vision module is arranged in the side of apparatus for coating, is coated in the process of running for shooting the apparatus for coating
Liquid is immersed roller and is formed by the first meniscus and the immersed roller strap of coating fluid through soaking between roller and back flow roll from being taken up in coatings tank
Roller gap location is formed by the second meniscus.
Above-mentioned thickness measure control module generally use PLC control system and its relevant control circuit.
Above-mentioned data acquisition module generally includes data acquisition and control module, data memory module and can obtain detection institute
It includes coating fluid relevant parameter to need the various existing equipments of related data, existing equipment（Fluid density, surface tension of liquid, stream
Body pressure, rheological coefficient and consistency coefficient etc.）Detection device and apparatus for coating relevant parameter detection device etc., various detections
Equipment obtain related data after can be used actively be sent to data memory module store, can also be by data acquisition and control module master
It is dynamic to transfer related data from various existing equipments and retransmit to data memory module.
By vision module, shooting the apparatus for coating, the immersed roller of coating fluid is taken up from coatings tank in the process of running
It is formed by the first meniscus and coating fluid is immersed roller strap and is formed by the second bent moon through soaking the roller gap location between roller and back flow roll
Face carries out mathematical modeling to the first meniscus and the second meniscus and its relevant region, is carried out on the basis of modeling later
The relevant derivation of equation goes out coating layer thickness, if calculated coating layer thickness by the formula and correlation data calculation derived
Preset thickness is not met, then adjusts apparatus for coating setting related to roll clearance adjusting mechanism, re-starts shooting Modeling Calculation.
As the further preferred embodiment of the present invention, the vision module includes filming apparatus, two leaching roller shootings between roller
The shooting regulating device of device and installation positions for filming apparatus between regulating roller and two leaching roller filming apparatus, between roller
Filming apparatus and two leaching roller filming apparatus are installed in shooting regulating device and in the side of the leaching roller and back flow roll；Roller
Between roller gap between filming apparatus and the leaching roller and back flow roll it is corresponding, soak roller filming apparatus and the leaching roller and coating fluid
Two contact areas are corresponding.Two leaching roller filming apparatus of setting, it is each self-produced when being used to shoot leaching roller using two different steerings
The first raw meniscus.And filming apparatus can select suitable shooting angle by shooting regulating device, it is best to obtain
Shooting effect.
The preferred Φ 32mm × 45mm of Lens of filming apparatus, leaching roller filming apparatus between above-mentioned roller.
As further preferred embodiments of the present invention, the vision module further includes common annular light source, two without shadow
Backlight between annular light source, leaching roller backlight and roller；Common annular light source is provided in the corresponding position of filming apparatus homonymy between roller
It sets, two are arranged without shadow annular light source the corresponding two corresponding positions of the leaching roller filming apparatus homonymy；Soak roller backlight
Backlight is in the other side of the leaching roller and back flow roll relative to common annular light source and without shadow annular light source, and roller between roller
Between backlight it is corresponding with common annular light source, leaching roller backlight it is corresponding without shadow annular light source with two.In order to ensure best
Shooting effect, rational light source and backlight is respectively set in each filming apparatus, ensure the first meniscus shot and
Second meniscus is clear enough.Since leaching roller and the survey region being coated between liquid level are to be in the coating being made of clear material
In slot, reflective in order to avoid coating cell wall generates impression to shooting effect, which is shot using no shadow annular light source.
As the further again preferred embodiment of the present invention, filming apparatus between the roller, before soaking the camera lens of roller filming apparatus
End face is 130 ~ 190mm, preferably 150 ~ 160mm at a distance from corresponding roller end face；Backlight between the leaching roller backlight, roller
With at a distance from corresponding roller end face be 0 ~ 250mm, preferably 50 ~ 200mm.Backlight between filming apparatus, leaching roller backlight and roller
Within the scope of above-mentioned setting, best shooting effect can be obtained.
As further preferred embodiments of the present invention, the shooting regulating device include two root posts, two cross bars and
Three mounting bases；Two root posts are vertically arranged respectively and, the both ends of two piece cross bar corresponding with the leaching roller, the both sides of back flow roll
It is separately mounted in corresponding two root posts and two cross bars can be moved up and down along the length direction of column；In top
Cross bar on installation there are one the mounting base that can be moved left and right along the length direction of cross bar, be equipped on the cross bar being below
Two mounting bases that can be moved left and right along the length direction of cross bar；Filming apparatus is set on the cross bar of top between the roller
Mounting base on and can be moved forward and backward, it is described two leaching roller filming apparatus be set at lower section cross bar on two installation
On seat and it can be moved forward and backward.Filming apparatus adjusts specific setting position with leaching roller filming apparatus and according to actual needs between roller
It sets, it is ensured that can be from multiple angle shot above-mentioned two survey regions.
Filming apparatus and two leaching roller filming apparatus are arranged in corresponding mounting base and front and back can move between above-mentioned roller
It is dynamic, refer to that filming apparatus and two leaching roller filming apparatus are closer or far from leaching roller and back flow roll between roller, wherein it refers to leaning on to move forward
It refers to far from leaching roller and back flow roll closely to soak roller and back flow roll, move backward.
Compared with prior art, the present invention having the following advantages that：
The present invention soaks roller coating cloth coating layer thickness online test method and its detection platform, can be carried out to leaching roller coating cloth coating layer thickness
Real-time online detects and controls, and shooting the apparatus for coating by vision module, coating fluid is immersed roller from coating in the process of running
It is taken up in slot and is formed by the first meniscus and the immersed roller strap of coating fluid through being formed at the roller gap between leaching roller and back flow roll
The second meniscus, mathematical modeling is carried out to the first meniscus and the second meniscus and its relevant region, and in the base of modeling
The relevant derivation of equation is carried out on plinth, coating layer thickness is gone out by the formula and correlation data calculation derived, if calculated
Coating layer thickness does not meet preset thickness, then controls the setting related to roll clearance adjusting mechanism of adjustment apparatus for coating, re-start
Shoot Modeling Calculation.
Description of the drawings
Fig. 1 is taken up from coatings tank for the immersed roller of coating fluid and is formed by the mathematical model figure of the first meniscus；
Fig. 2 is the mathematical model that coating fluid is formed by the second meniscus in leaching roller strap through soaking the roller gap location between roller and back flow roll
Figure；
Fig. 3 is the logic diagram of preferred embodiment for the present invention detection platform；
Fig. 4 be Fig. 3 in apparatus for coating, roll clearance adjusting mechanism and vision module structural schematic diagram；
Fig. 5 is the structural schematic diagram that regulating device is shot in Fig. 4.
Specific implementation mode
It is described further below in conjunction with the accompanying drawings with the preferred embodiment of the present invention.
Leaching roller coating cloth coating layer thickness online test method of the present invention includes the following steps successively：
（1）Coating fluid of the selection for coating, obtains the physical parameter of coating fluid：Fluid density ρ, surface tension of liquid σ, fluid
Pressure p, rheological coefficient n and consistency coefficient k；
（2）Adjust the roller gap of leaching roller and back flow roll by roll clearance adjusting mechanism, and run leaching roller and back flow roll, obtain leaching roller and
The relevant parameter of back flow roll：Soak roller radius R1, back flow roll radius R2, leaching roller and back flow roll between most pony roll gap H0, leaching roller linear velocity u1
With back flow roll linear velocity u2；
（3）Shooting apparatus for coating by vision module, coating fluid is immersed roller and is taken up and to be formed from coatings tank in the process of running
The first meniscus and coating fluid be formed by the second meniscus through soaking the roller gap location between roller and back flow roll in leaching roller strap；
（4）To step（3）Captured the first meniscus, the second meniscus carry out mathematical modeling respectively, are surveyed by mathematical model
Measure the radius r of the first meniscus1, in coatings tank coating liquid level and roller tangent line and vertical direction at the contact point for soaking roller folder
The radius r of angle α, the second meniscus2And the second shortest distance x between meniscus and most pony roll gapc；
（5）Invocation step（1）（2）（4）Gained relevant parameter, and calculate according to the mathematical model established the coating on back flow roll
Thickness；
（6）Judgment step（5）Whether the coating layer thickness being calculated meets preset thickness requirement, if do not met, changes leaching
Roller linear velocity u1, back flow roll linear velocity u2Or the most pony roll gap H between leaching roller and back flow roll0In at least one of numerical value, re-execute
Step（2）To step（5）, until the coating layer thickness on back flow roll meets preset thickness requirement.
In step（4）In, to apparatus for coating, coating fluid is immersed roller and is taken up and to be formed from coatings tank in the process of running
The first meniscus and coating fluid be immersed roller strap and be formed by the second meniscus through soaking the roller gap location between roller and back flow roll,
Mathematical modeling is carried out respectively, is carried out the relevant derivation of equation on the basis of modeling later, is obtained step（5）Required calculating is public
Formula is described as follows：
1, it is immersed roller about coating fluid and is taken up from coatings tank and be formed by the mathematical modeling and its derivation of equation of the first meniscus：
First, the differential equation of motion of power-law fluid is introduced：
（1）
ρ is the density of fluid in formula, and p is the pressure of fluid, and u, v, w are component of the speed in three reference axis, and k is consistency system
Number, n is Rheological Index, fx、fyAnd fzFor component of the mass force in three reference axis.
Coordinate system as shown in Figure 1 is established, since roller radius is very big compared to coating fluid thickness and meniscus, so approximate
Roll surface is regarded as plane by ground, and using the intersection point of coating fluid horizontal plane and leaching roller roll surface as origin, leaching roller rotary speed direction is x-axis direction,
With vertical with roll surface for y-axis.
The continuity equation of coating fluid is：
（2）
If the flowing of coating fluid is permanent laminar flow, coating fluid is that homogeneous is incompressible.V=w known to the case where being flowed by coating fluid=
0, according to the continuity equation formula of fluid, obtained by conditions above simplified style (1)：
（3）
Abbreviation formula（3）：
（4）
It enables, then above formula can by abbreviation be it is following in the form of：
（5）
To formula（5）It integrates：
（6）
To formula（6）It introduces with downstream condition：
Whereinh i The thickness of roller is soaked on coating fluid band,u 1 To soak the linear velocity of roller, formula（6）It can turn to：
（7）
Volume flowQFor：
（8）
Abbreviation obtains：
（9）
Boundary condition of the coating fluid at Free Surface be：
（10）
Formula（10）Middle r1The radius that meniscus is formed by leaching roller, r are played from coatings tank band for coating fluid1It is represented by x's
Functionr(x), formula（10）It can turn to：
（11）
By formula（10）Substitution formula（9）And it integrates：
（12）
Wherein leaching roller rotating speed u1For known quantity, fluid density ρ, surface tension of liquid σ, Fluid pressure p, the rheological coefficient of coating fluid
N and consistency coefficient k is liquid level and the roller at the contact point of leaching roller can be coated in coatings tank by testing the physical parameter measured
The angle α of tangent line and vertical direction can be calculated by soaking the depth of immersion of roller, and coating fluid plays institute's shape on leaching roller from coatings tank band
At meniscus radius r1It is taken pictures and is measured by vision module, established the coordinate system such as Fig. 1, formula can be passed through（11）It acquires,
Simultaneous formula again（8）With formula（12）, Q can be acquired.
2, mathematical modeling and its derivation of equation of the roller strap through the roller gap between leaching roller and back flow roll are immersed about coating fluid：
Coating fluid flows through roller gap in the division situation of outlet end as shown in Fig. 2, to soak the circle of roller and back flow roll in same vertical plane
The heart away from place straight line be y-axis, using y-axis with leaching roller roll surface intersection point establish coordinate system, h as originiIt is brought between roller for leaching roller
Thickness before gap, h1The coating fluid thickness in coatings tank, h are returned to for leaching roller strap2The coating fluid thickness taken away for back flow roll is i.e. final
Coating thickness, H0For the most pony roll gap between back flow roll and leaching roller, unsaturation type, which is coated in flow field, enters the total of two roller gap locations
Volume flow is equal to the coating fluid volume flow that leaching roller strap enters.Coating fluid flowing can be retouched with the fluid motion differential equation
It states, formula（1）And formula（2）It is equally applicable to this model.
If the flowing of coating fluid is permanent Laminar Flow, coating fluid is that homogeneous is incompressible.Coating fluid is in roller gap location
Flowing can be simplified to the flowing between two blocks of parallel-plates, so the component of speed in y-direction can be ignored, sov=w=0.According to formula（2）Known to.Because the width of roller is very big for roller gap, it is assumed that u is in z
It is unchanged on direction, i.e.,.Again because being Steady Flow, coating flow velocity does not change over time, so.From
And it is the function of y to learn speed u.Gravity is only important in y-direction, i.e.,.By above-mentioned hypothesis substitution formula（1）And change
Jian Ke get：
（13）
By formula（13）It is found that pressure P is only the function of x, y, to formula（13）In second formula integral can obtain：, institute
WithIt is a function only related with x.Because u is only the function of y, to formula（13）In first formula abbreviation
：
（14）
It enables, then formula（14）Following form can finally be turned to：
（15）
To formula（15）Integral can obtain：
（16）
By a round part similar to one section of parabola, the distance H between arbitrary neighborhood roll surfacexIt can approximately be indicated with following formula：
（17）
Defining mean radius R is：
（18）
Then formula（17）It is represented by：
（19）
Assuming that coating fluid is radial without infiltration, circumferencial direction non-displacement, velocity boundary conditions are：
（1）, the radial acceleration of circular motion is
（2）, the radial acceleration of circular motion is
By boundary condition（1）Substitution formula（15）：
By boundary condition（2）Substitution formula（15）：
Above-mentioned condition is substituted into formula（16）In can obtain：
It takes、, can obtain speed u is：
（20）
It is radial without infiltration and in the case of circumferencial direction non-displacement in coating fluid, for stationary flow fluid any point x body
Product flow is steady state value, and the expression formula of volume flow Q is：
（21）
By formula（10）It can obtain：, wherein r2It is that coating fluid divides the bent moon to be formed in outlet end later by roller gap
Radius surface, if：
（22）
Boundary condition of the coating fluid at burble point A be, it is updated to formula（20）It can obtain：
（23）
As shown in Figure 2, when coating fluid existsWhen, coating fluid is all taken away by back flow roll, exists：
（24）
By formula（20）And formula（23）Substitution formula（24）Abbreviation obtains：
（25）
Similarly, when coating fluid existsWhen, coating fluid all walk by immersed roller strap, exists：
（26）
By formula（20）And formula（23）Substitution formula（26）Abbreviation obtains：
（27）
For formula（20）, formula（23）, formula（25）And formula（27）In, soak roller radius R1, back flow roll radius R1For fixed value, roller linear speed is soaked
Spend u1With back flow roll linear velocity u2It is adjusted respectively by leaching roll driving apparatus and back flow roll driving device, soaks the most pony roll between roller and back flow roll
Gap H0It is adjusted by roll clearance adjusting mechanism, coating fluid in outlet end after roller gap by dividing the meniscus radius to be formed
r2, coating fluid is in outlet end by dividing the meniscus to be formed and most pony roll gap H after roller gap0Between shortest distance xc
It can be shot and be obtained by vision module, simultaneous formula（20）, formula（23）And formula（25）H can be acquired2, simultaneous formula（20）, formula（23）
And formula（27）H can be acquired1。
In conclusion in the correlation values of coating fluid（Fluid density ρ, surface tension of liquid σ, Fluid pressure p, rheology system
Number n and consistency coefficient k）, mechanical module correlation values（Soak roller radius R1, back flow roll radius R2, leaching roller linear velocity u1, back flow roll linear speed
Spend u2Most pony roll gap H between leaching roller and back flow roll0）In the case of can directly acquiring, need to only vision module be used to shoot institute
Stating apparatus for coating, coating fluid is immersed roller and is taken up from coatings tank and is formed by the first meniscus in the process of running, and coating
Liquid is formed by the second meniscus in leaching roller strap through soaking the roller gap location between roller and back flow roll, obtain by above-mentioned modeling, derivation,
It calculates, you can obtain the Coating thickness at the moment.
As shown in figure 3, a kind of leaching roller coating cloth coating layer thickness on-line checking platform, including apparatus for coating 1, roller gap adjustment machine
Structure 2, vision module 3, thickness measure control module 4 and data acquisition module 5, apparatus for coating 1 control mould with thickness measure respectively
Block 4 and data acquisition module 5 are electrically connected, and vision module 3 is electrically connected with thickness measure control module 4, thickness measure control module 4
It is electrically connected with data acquisition module 5；4 generally use PLC control system of thickness measure control module and its relevant control circuit；
Data acquisition module 5 generally includes data acquisition and control module, data memory module and can obtain related data needed for detection
Various existing equipments, existing equipment includes coating fluid relevant parameter（Fluid density, surface tension of liquid, Fluid pressure, rheology
Coefficient and consistency coefficient etc.）Detection device and apparatus for coating relevant parameter detection device etc., various detection devices obtain phases
Close can be used after data be actively sent to data memory module storage, can also be by data acquisition and control module active from various existing
There is equipment to transfer related data to retransmit to data memory module.
Above-mentioned apparatus for coating 1 is electrically connected with thickness measure control module 4 and data acquisition module 5 respectively, and data is made to acquire
Module can be to each relevant parameter of apparatus for coating（Including soaking roller radius R1, back flow roll radius R2, leaching roller and back flow roll between most
Pony roll gap H0, leaching roller linear velocity u1With back flow roll linear velocity u2）It is acquired storage, thickness measure control module is then arranged to painting
Output control signal is set to be controlled.
Above-mentioned vision module 3 is electrically connected with thickness measure control module 4, and vision module 3 is for shooting the apparatus for coating 1
The immersed roller of coating fluid is taken up from coatings tank in the process of running is formed by the first meniscus and coating fluid by band through leaching
Roller gap location between roller and back flow roll is formed by the second meniscus, then vision module 3 by the first meniscus taken and
The photo of second meniscus is sent to thickness measure control module 4 and measures calculating.
Above-mentioned thickness measure control module 4 is electrically connected with data acquisition module 5, and thickness measure control module 4 can be from number
According to data needed for reading correlation in acquisition module 5, or will be in the data that be calculated storage to data acquisition module 5.
As shown in Figure 4, Figure 5, apparatus for coating 1 includes coatings tank 101, leaching roller 102, back flow roll 103, leaching roll driving apparatus 104
With back flow roll driving device 105, coatings tank 101 is made of transparent material, soaks roll driving apparatus 104 and back flow roll driving device 105
Be all made of motor, soak the control signal of roll drive motor 104 and back flow roll driving motor 105 with thickness measure control module 4
Control output end electrical connection；It soaks roller 102 to be mounted on the output shaft of leaching roll drive motor 104, on leaching roller 102 and back flow roll 103
Under be correspondingly arranged, leaching roller 102 lower part be immersed in coatings tank 101；Back flow roll 103 is mounted on the output shaft of back flow roll driving motor 105
Above and with roll clearance adjusting mechanism 2 it is connected, roll clearance adjusting mechanism 2 includes eccentric turbine 201 and worm screw 202, back flow roll 103
Roll shaft be mounted in the eccentric orfice of eccentric worm gear 201, worm screw 202 is connected with eccentric turbine 201, by rotating snail manually
Bar 202 drives worm gear 201 to rotate；
Vision module 3 includes 301, two leaching roller filming apparatus 302 of filming apparatus, shooting regulating device 303, common annular between roller
Light source 304, two is without backlight 307 between shadow annular light source 305, leaching roller backlight 306 and roller；Filming apparatus 301 and two between roller
A leaching roller filming apparatus 302 is respectively mounted in shooting regulating device 303 and is shot between the side of leaching roller 102 and back flow roll 103, roller
Roller gap between device 301 and leaching roller 102 and back flow roll 103 is corresponding, soaks roller filming apparatus 302 and leaching roller 102 and coating fluid
Two contact areas it is corresponding；Filming apparatus 301 between roller, leaching roller filming apparatus 302 the preferred Φ 32mm of Lens ×
45mm, filming apparatus 301 between roller, leaching roller filming apparatus 302 camera lens front end face be 130 with corresponding roller end face at a distance from ~
190mm, preferably 150 ~ 160mm；It includes 3031, two cross bars 3032 of two root posts and three mounting bases to shoot regulating device 303
3033, two root posts 3031 are vertically arranged and corresponding with leaching roller 102, the both sides of back flow roll 103 respectively, two cross bars 3032
Both ends are separately mounted in corresponding two root posts 3031 and two cross bars 3032 can be along the length direction of column 3031
It moves up and down, there are one the installations that can be moved left and right along the length direction of cross bar 3032 for installation on the cross bar 3032 in top
Seat 3033, there are two the mounting bases that can be moved left and right along the length direction of cross bar 3032 for installation on the cross bar 3032 being below
3033；In the mounting base 3033 that filming apparatus 301 is set on the cross bar 3032 of top between roller and it can be moved forward and backward, two
In two mounting bases 3033 that a leaching roller filming apparatus 302 is set on the cross bar 3032 of lower section and it can be moved forward and backward；
Common annular light source 304 is provided in the corresponding position of 301 homonymy of filming apparatus between roller, and two are arranged without shadow annular light source 305
The 302 corresponding position of homonymy of roller filming apparatus is soaked at corresponding two；Backlight 307 is in leaching between leaching roller backlight 306 and roller
The other side of roller 102 and back flow roll 103 relative to common annular light source 304 and without shadow annular light source 305, and backlight between roller
307 is corresponding with common annular light source 304, and leaching roller backlight 306 is corresponding without shadow annular light source 305 with two, soaks roller backlight
Backlight 307 is 0 ~ 250mm, preferably 50 ~ 200mm at a distance from corresponding roller end face between source 306, roller.
Shooting the apparatus for coating 1 by vision module 3, coating fluid is immersed roller from coatings tank by band in the process of running
It rises and is formed by the first meniscus and coating fluid and is immersed roller strap to be formed by second curved through soaking the roller gap location between roller and back flow roll
Lunar surface carries out mathematical modeling to the first meniscus and the second meniscus and its relevant region, later on the basis of modeling into
The relevant derivation of equation of row, goes out coating layer thickness, if calculated painting thickness by the formula and correlation data calculation derived
Degree does not meet preset thickness, then adjusts apparatus for coating setting related to roll clearance adjusting mechanism, re-starts shooting modeling meter
It calculates.
In order to ensure best shooting effect, two leaching roller filming apparatus 302 are set and use two for shooting leaching roller 102
The first meniscus for respectively generating when difference turns to, filming apparatus 301, leaching roller filming apparatus 302, which can pass through to shoot, between roller adjusts
Regulating device 303 selects suitable shooting angle, it is ensured that can be from multiple angle shot above-mentioned two survey regions.To obtain most
Good shooting effect；Rational light source and backlight is respectively set in each filming apparatus 301,302, ensures first shot
Meniscus and the second meniscus are clear enough；Since leaching roller and the survey region being coated between liquid level are in by transparent material system
At coatings tank in, in order to avoid coating cell wall it is reflective to shooting effect generate impression, the region is using no shadow annular light source
Shooting.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, each section title etc. can not
Together, the equivalent or simple change that all structure, feature and principles according to described in inventional idea of the present invention are done, is included in the present invention
In the protection domain of patent.Those skilled in the art can do described specific embodiment various each
The modify or supplement or adopt similar mode of sample substitutes, and without departing from structure of the invention or surmounts the claims
Defined range, is within the scope of protection of the invention.
Claims (12)
1. a kind of leaching roller coating cloth coating layer thickness online test method, it is characterised in that include the following steps successively：
（1）Coating fluid of the selection for coating, obtains the physical parameter of coating fluid：Fluid density ρ, surface tension of liquid σ, fluid
Pressure p, rheological coefficient n and consistency coefficient k；
（2）Adjust the roller gap of leaching roller and back flow roll by roll clearance adjusting mechanism, and run leaching roller and back flow roll, obtain leaching roller and
The relevant parameter of back flow roll：Soak roller radius R1, back flow roll radius R2, leaching roller and back flow roll between most pony roll gap H0, leaching roller linear velocity u1
With back flow roll linear velocity u2；
（3）Shooting apparatus for coating by vision module, coating fluid is immersed roller and is taken up and to be formed from coatings tank in the process of running
The first meniscus and coating fluid be formed by the second meniscus through soaking the roller gap location between roller and back flow roll in leaching roller strap；
（4）To step（3）Captured the first meniscus, the second meniscus carry out mathematical modeling respectively, are surveyed by mathematical model
Measure the radius r of the first meniscus1, in coatings tank coating liquid level and roller tangent line and vertical direction at the contact point for soaking roller folder
The radius r of angle α, the second meniscus2And the second shortest distance x between meniscus and most pony roll gapc；
（5）Invocation step（1）（2）（4）Gained relevant parameter, and calculate according to the mathematical model established the coating on back flow roll
Thickness；
（6）Judgment step（5）Whether the coating layer thickness being calculated meets preset thickness requirement, if do not met, holds again
Row step（2）To step（5）, until the coating layer thickness on back flow roll meets preset thickness requirement.
2. leaching roller coating cloth coating layer thickness online test method described in accordance with the claim 1, it is characterised in that：The step（4）
In the mathematical modeling of the first meniscus be：Using the intersection point of coating fluid horizontal plane and leaching roller roll surface as origin, to soak roller rotary speed direction
Coordinate system is established for x-axis；The step（4）In the mathematical modeling of the second meniscus be：To soak roller and the back of the body in same vertical plane
Straight line where the distance of center circle of roller is y-axis, establishes coordinate system as origin using y-axis and the intersection point of leaching roller roll surface.
3. by establishing above-mentioned two coordinate system, the radius r of the first meniscus can be directly measured1, coating liquid level and leaching in coatings tank
The angle α of roller tangent line and vertical direction at the contact point of roller, the radius r of the second meniscus2And second meniscus with it is minimum
Shortest distance x between roller gapc。
4. soaking roller coating cloth coating layer thickness online test method according to claim 2, it is characterised in that：Step（5）The middle back of the body
Coating layer thickness h on roller2It can be calculated by following formula simultaneous：
、
,
Wherein
；
In above-mentioned each parameter：ρ is the fluid density of coating fluid, and σ is the surface tension of liquid of coating fluid, and p is the fluid of coating fluid
Pressure, n are the rheological coefficient of coating fluid, and k is the consistency coefficient of coating fluid, passes through step（1）It is directly measured by existing equipment；
R1To soak roller radius, R2For back flow roll radius, H0For the most pony roll gap between leaching roller and back flow roll, u1To soak roller linear velocity, u2For the back of the body
Roller linear velocity, R1、R2For roller own dimensions, H0It is measured after adjusting setting by roll clearance adjusting mechanism, u1、u2By soaking roller and the back of the body
It is measured after the corresponding driving device setting of roller；r2For the radius of second meniscus, xcFor the second meniscus and most pony roll gap
Between the shortest distance, r2And xcPass through step（4）It is calculated.
5. leaching roller coating cloth coating layer thickness online test method described in accordance with the claim 3, it is characterised in that：The step（6）
In if step（5）Calculated coating layer thickness does not meet preset thickness, re-executes step（2）When, change leaching roller linear velocity
u1, back flow roll linear velocity u2Or the most pony roll gap H between leaching roller and back flow roll0In at least one of numerical value.
6. a kind of leaching roller coating cloth coating layer thickness on-line checking platform, including apparatus for coating and roll clearance adjusting mechanism, feature exist
In：Further include vision module, thickness measure control module and data acquisition module；Vision module is for shooting the apparatus for coating
The immersed roller of coating fluid is taken up from coatings tank in the process of running is formed by the first meniscus and coating fluid by band through leaching
Roller gap location between roller and back flow roll is formed by the second meniscus；Apparatus for coating respectively with thickness measure control module and data
Acquisition module is electrically connected, and vision module is electrically connected with thickness measure control module, thickness measure control module and data acquisition module
Block is electrically connected.
7. soaking roller coating cloth coating layer thickness online test method according to claim 5, it is characterised in that：The apparatus for coating
It is made of transparent material including coatings tank, leaching roller, back flow roll, leaching roll driving apparatus and back flow roll driving device, coatings tank；Soak roller peace
On the power output end of leaching roll driving apparatus, back flow roll is mounted on the power output end of back flow roll driving device and between roller
Gap regulating mechanism is connected, and leaching roller is correspondingly arranged up and down with back flow roll, and the lower part for soaking roller is immersed in coatings tank.
8. leaching roll driving apparatus and the driving of back flow roll driving device generally use motor, leaching roll drive motor and back flow roll driving motor
Control signal is electrically connected with the control output end of thickness measure control module.
9. soaking roller coating cloth coating layer thickness online test method according to claim 6, it is characterised in that：The vision module
Including filming apparatus, two leaching roller filming apparatus between roller and for filming apparatus between regulating roller and two leaching roller filming apparatus
Installation position shooting regulating device, filming apparatus and two leaching roller filming apparatus are installed in shooting regulating device between roller
And in the side of the leaching roller and back flow roll；Roller gap between roller between filming apparatus and the leaching roller and back flow roll is corresponding, leaching
Roller filming apparatus and the leaching roller are corresponding with two contact areas of coating fluid.
10. soaking roller coating cloth coating layer thickness online test method according to claim 7, it is characterised in that：The vision mould
Block further include common annular light source, two without shadow annular light source, leaching roller backlight and roller between backlight；Common annular light source setting
It is the corresponding position of filming apparatus homonymy between roller, two are arranged without shadow annular light source and are filled in the corresponding two leaching rollers shootings
Set the corresponding position of homonymy；Leaching roller backlight and roller between backlight be in the leaching roller and back flow roll relative to common annular light source with
Roller backlight and two are soaked without shadow in the other side without shadow annular light source, and backlight is corresponding with common annular light source between roller
Annular light source is corresponding.
11. soaking roller coating cloth coating layer thickness online test method according to claim 8, it is characterised in that：It is clapped between the roller
It is 130 ~ 190mm at a distance from corresponding roller end face to take the photograph device, soak the camera lens front end face of roller filming apparatus, preferably 150 ~
160mm；Backlight is 0 ~ 250mm, preferably 50 ~ 200mm at a distance from corresponding roller end face between the leaching roller backlight, roller.
12. soaking roller coating cloth coating layer thickness online test method according to claim 7, it is characterised in that：The shooting is adjusted
Regulating device includes two root posts, two cross bars and three mounting bases；Two root posts be vertically arranged respectively and with the leaching roller, the back of the body
The both sides of roller are corresponding, and the both ends of two cross bars are separately mounted in corresponding two root posts and two cross bars can be along vertical
The length direction of column moves up and down；It can be moved left and right along the length direction of cross bar there are one installations on cross bar in top
Mounting base, there are two the mounting bases that can be moved left and right along the length direction of cross bar for installation on the cross bar being below；The roller
Between filming apparatus be set at top cross bar on mounting base on and can be moved forward and backward, described two leaching roller filming apparatus
In two mounting bases being set on the cross bar of lower section and it can be moved forward and backward.
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| Application Number | Priority Date | Filing Date | Title |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106767461A (en) * | 2017-02-27 | 2017-05-31 | 青岛理工大学 | A kind of face contacts lubrication experiment machine oil film thickness On-line Measuring Method |
| CN107218895A (en) * | 2017-06-07 | 2017-09-29 | 深圳市华星光电技术有限公司 | A kind of optical thickness monitor device and monitoring method |
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2018
- 2018-04-03 CN CN201810285736.6A patent/CN108534689A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106767461A (en) * | 2017-02-27 | 2017-05-31 | 青岛理工大学 | A kind of face contacts lubrication experiment machine oil film thickness On-line Measuring Method |
| CN107218895A (en) * | 2017-06-07 | 2017-09-29 | 深圳市华星光电技术有限公司 | A kind of optical thickness monitor device and monitoring method |
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| Title |
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| 包能胜 等: "浸辊涂布涂层厚度在线检测平台的机理建模与设计", 《包装工程》 * |
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