CN107379494B - A kind of the film thickness monitoring system and bolt method for self-locating self-positioning based on bolt - Google Patents
A kind of the film thickness monitoring system and bolt method for self-locating self-positioning based on bolt Download PDFInfo
- Publication number
- CN107379494B CN107379494B CN201710429903.5A CN201710429903A CN107379494B CN 107379494 B CN107379494 B CN 107379494B CN 201710429903 A CN201710429903 A CN 201710429903A CN 107379494 B CN107379494 B CN 107379494B
- Authority
- CN
- China
- Prior art keywords
- bolt
- thickness
- film
- unit
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92114—Dimensions
- B29C2948/92152—Thickness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92609—Dimensions
- B29C2948/92647—Thickness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The film thickness monitoring system and bolt method for self-locating self-positioning based on bolt that the invention discloses a kind of, film thickness monitoring system includes squeezing out unit, it is cooled and shaped unit, draw unit, thickness measuring unit, monitor control unit and rolling unit, wherein monitoring in control unit has acquisition module, processing module, control module, acquisition module is by film profile thickness curve data transmission to processing module, processing module, which calculates, obtains the position that film thickness estimates each bolt of extruder die head simultaneously, and calculating error is reduced by self-positioning processing, control module adjusts the thickness of film vertical and horizontal by frequency converter and die head adjuster respectively.The present invention can quickly carry out diebolt self-positioning, adjusting movement is small in position fixing process, avoid influence of the long-time bolt heating to normally producing, and accurately bolt positioning is avoided that thickness deviation is difficult to the problem of being zeroed in BOPP film manufacturing process, making film, laterally and longitudinally thickness keeps height consistent.
Description
Technical field
The present invention relates to film fabrication techniques fields, and in particular to a kind of film thickness monitoring system self-positioning based on bolt and
Bolt method for self-locating.
Background technique
BOPP film, that is, bidirectional stretching polypropylene film be as obtained by biaxial tension, it be by physics, chemistry and
The plastic product that the means specially-shaped such as machinery is process.BOPP production line is a complicated nonlinear system.Its technique stream
Journey specifically includes that raw material melting, extrusion, cooling and shaping, longitudinal stretching, cross directional stretch, trimming, sided corona treatment, batches.
Physical mechanical property such as tensile strength, elongation at break, turbidity, gloss as BOPP film product quality indicator
Deng because depending mainly on the attribute of material itself, so all easily reaching requirement.And as the main of re-workability and service performance
Con trolling index, i.e. film gauge variation and Film Average Thickness deviation, then depend mainly on the manufacturing process of film.Even if manufacture
For plastics thickness control in the deviation range that standard allows, but after the winding of thousands of tunics is accumulative, thickness deviation is big in the process
Position on may form the bad defects such as hoop, sudden and violent muscle or chase, the reprocessing that these defects directly influence user uses,
Such as phenomena such as the dislocation of color printing chromatography or gluing irregular corrugation, it is made to reduce or lose use value.So in BOPP film production
Topic is how to improve and stabilizing films thickness and precision between the quality of most critical.
For plastics thickness control based on the real-time detection to thickness, it is logical that such as application No. is 2014201577223 Chinese patents
After crossing X-ray scanning acquisition film thickness, two PID regulators are respectively adopted to carry out the control of the horizontal and vertical thickness of film
System, similar method is also used application No. is 2007201517097 Chinese patent, is pointed out simultaneously, in order to obtain thickness
Uniform film, it is necessary to realize that thickness measurements and measurement position are accurately positioned.Application No. is 2014204575910 China
Patent then carries out the alignment of basement membrane by deckle.
The online Plastics Thickness Control System of Quo of BOPP Films in China manufacturing line and thickness gauge be much it is complete from
Foreign countries introduce, and the data of calibrator, which need manually to carry out the corresponding positioning of bolt in operation interface, to be provided with for control system
The thickness data of effect.Currently, carrying out the corresponding common method of bolt to the thickness data of calibrator output, there are mainly two types of,
It marks first is that crossing at different bolts, corresponding place is then found on calibrator scanning support, to determine the position of bolt
It sets；Second is that also measuring the developed width of film web, the width referring to die head is thin to calculate while detecting section with calibrator
The necking down amount of film, and then diebolt is corresponded to.Both methods is required to manually be carried out according to practical condition auxiliary
Mark, measurement and judgement are helped, artificial judgment is not only inaccurate, can not also stablize.Due to lacking to the continuous accurate of film profile
Positioning, the thickness control effect of film and the quality of produced product suffer from influence.For this reason, it may be necessary to solve film thickness monitoring system
The self-positioning problem of bolt is carried out to the film profile thickness curve of calibrator output in system.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of film thickness monitoring system, it can be in the incipient stage of control process
It assists calibrator to carry out thickness measuring positioning to bolt: by one group of dynamic regulation selected bolt, the film of calibrator output being cutd open
Face thickness curve is handled and is calculated, and the deviation of bolt positioning and corresponding adjustment bolt location estimation is judged, thus to extrusion
Machine diebolt is accurately positioned, and output token has the film profile thickness value set of diebolt position；To be based on being somebody's turn to do
Set carries out the horizontal and vertical consistency of thickness control of film.
The technical solution of the invention is as follows, provides a kind of film thickness monitoring system self-positioning based on bolt with flowering structure
System comprising it squeezes out unit, be cooled and shaped unit, draw unit, thickness measuring unit, monitoring control unit and rolling unit, it is described
Squeezing out unit includes extruder and die head, and the draw unit includes vertical drawing-die block and horizontal drawing-die block, the thickness measuring unit include
First calibrator and the second calibrator, film raw material melt are cooled and shaped unit after extruder extrusion and are cured as slab, cast
Piece drawn unit is stretched as after wide volume film by rolling unit harvesting being parent roll, first calibrator and the second calibrator point
Not Wei Yu draw unit both ends thickness monitor is carried out to the slab and wide volume film, it is characterised in that:
The monitoring control unit includes acquisition module, processing module, control module, die head adjuster and frequency converter, institute
It states after acquisition module acquires film profile thickness curve data from thickness measuring unit and sends processing module to, processing module, which calculates, to be obtained
The position of film thickness and estimation each bolt of extruder die head, and estimated position is adjusted by self-positioning processing, control module connects
Receive processing module output label have the film profile thickness value set of position after pass through frequency converter and die head respectively
The aperture of adjuster control extruder revolving speed and die head.
Preferably, the processing module includes calculation part, sentences knowledge portion, adjustment portion and storage and output section, the calculating
Extruder bolt location is estimated in portion, and calculates thickness value at each bolt based on thickness curve collected, it is described sentence the retrieval of knowledge portion,
Identify bolt to be processed, and adjustment bolt position, the adjustment portion carries out temperature adjusting to bolt to be processed, passes through control module
Issue an instruction to change the aperture of extruder lip.
Preferably, the film profile thickness curve data are expressed with film profile image format, wrapped in described image
Include a film thickness curve, reference axis and the auxiliary line parallel with reference axis indicated in different colors respectively.
Preferably, the control module includes controller 1 and controller 2, the controller 2 by die head adjuster with
The mode of impulse wave controls the on-off of diebolt solid-state relay, to adjust the bolt by the temperature for controlling bolt
The aperture of place die head section, to realize that the thickness of film section corresponding to the bolt is adjusted；The controller 1 is to adjust frequency converter
Mode control the revolving speed of extruder, to realize the adjusting of film ensemble average thickness by control extrusion output.
Preferably, the adjacent bolt group sentenced knowledge portion and retrieve the positive and negative contrary sign of all thickness deviations in the search cycle
It closes, selects only this group of bolt to be adjusted as bolt to be processed, and by the adjustment portion for minimum one group of difference in combination.
Sentence knowledge portion preferably, described detection differentiation is carried out to the film thickness after the adjusting, according to the bolt group
The movement of zero-deviation position in range is closed to adjust bolt location, and is updated storage and output section content.
Preferably, the impulse wave uses PWM or PFM wave.
Another technical solution of the invention is to provide a kind of bolt method for self-locating, which is characterized in that by preferred
Specific one group of bolt carries out thickness proportion adjusting, and is adjusted according to the variation for adjusting front and back film thickness to bolt estimated location
It is whole comprising following steps:
(S1) system initialization sets period, threshold value；
(S2) film profile thickness curve data, the corresponding thickness value of calculated curve are acquired from calibrator；
(S3) turn S4 if existing location data, otherwise carry out initial alignment, it is after artificial opposite side, each bolt is equal
Film profile thickness value collection that is even to be distributed on curve horizontal axis, updating fastener locations set and be marked with diebolt position
It closes, turns S7 later；
(S4) then turn S5 if not the search cycle, otherwise carry out bolt retrieval, search for the positive and negative contrary sign of all thickness deviations
Adjacent bolt combination, and select the smallest group echo of the difference of wherein thickness deviation be (Mj1, Mj2) conduct spiral shell to be processed
Bolt control in the ratio of respective thickness deviation to two bolts, while recording two by adjustment portion by control module
The abscissa XP for the point that thickness deviation is zero between bolt, turns S7 later；
(S5) if not the period is differentiated, then turn S6, otherwise carry out the judgement and adjusting of bolt location estimated bias, again
The zero bias retrieved between bolt (Mj1, Mj2) are not good enough, remember that its abscissa is XQ；Compare XQ and XP, if the two difference is being set
In threshold range, then turn S8；All bolts are moved to right if XQ is less than XP, otherwise move to left all bolts, update bolt positioning
Location sets and the film profile thickness value set for being marked with diebolt position, turn S7 later；
(S6) positioning is not dealt with, and is carried out PID adjusting to each bolt to realize that film thickness consistency controls by control module, is turned
S7；
(S7) it waits next period to arrive, turns S2；
(S8) positioning finishes, and terminates.
Preferably, the bolt location estimated bias dMAdjusting carry out as follows: dM=η dzf, wherein it is
Number η dynamic value, initial value is a number in section (1/3,1/2), if finding d laterzfDirection when changing
The η of η '=1/2, otherwise the η of η '=1.1, η ' are updated coefficient.
Preferably, the bolt location estimated bias dMAdjusting carry out as follows: dM=ρ x, ρ are section
A number in [0.8,1], x are the positive number solution by following equation:
Δ·x2+ x (Δ d+dT-2 Δ L) -2 Δ Ld=0
Wherein, T and Δ are respectively the film thickness in ratio control leading zero deviation point two sides symmetric position and thickness adjusting
Amount, L be the position and zero bias it is not good enough at a distance from, d be ratio control before and after zero-deviation point displacement.
Using the solution of the present invention, compared with prior art, have the advantage that the present invention is applied to the thin of BOPP production
Film thickness On-line Control acquires the film profile thickness signal on calibrator in real time, passes through one to the positive and negative contrary sign of thickness deviation
Group bolt is adjusted and the position movement not good enough according to zero bias after adjusting, is accordingly adjusted to current fastener locations,
It realizes to the automatic accurate positioning of measured film thickness position and the real-time automatic monitoring of film thickness, effectively prevents artificial
Misjudgment；The transverse gage uniformity and longitudinal thickness consistency that BOPP film is realized by feedback control, improve thin
Film final product quality；In addition, automatic positioning process of the invention is short, it is small to adjust actuating quantity, the heating of long-time bolt is avoided to just
The influence often produced, and fast and accurately bolt positioning is avoided that thickness deviation in BOPP film manufacturing process was difficult to be zeroed asks
Topic.
Detailed description of the invention
Fig. 1 is that the present invention is based on the structural schematic diagrams of the self-positioning film thickness monitoring system of bolt；
Fig. 2 is the structural schematic diagram of processing module in the present invention；
Fig. 3 is extruder die head partial structural diagram；
Fig. 4 is calibrator display interface figure in BOPP production；
Fig. 5 is that processing module extracts aim curve data flowchart；
Fig. 6 is extruder die hook bolt deviations schematic diagram；
Fig. 7 is that film thickness adjusts schematic diagram when diebolt positioning is to the right；
Fig. 8 is that film thickness adjusts schematic diagram when diebolt positioning is to the left；
Fig. 9 is that spiral shell examines self-positioning work flow diagram；
Figure 10 is BOPP film thickness control flow diagram；
Figure 11 is lateral film thickness adjustment signal schematic diagram.
Specific embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any substitution made in the spirit and scope of the present invention, modification, equivalent method and scheme.
In order to make the public have thorough understanding to the present invention, it is described in detail in the following preferred embodiment of the present invention specific
Details, and the present invention can also be understood completely in description without these details for a person skilled in the art.
The present invention is more specifically described by way of example referring to attached drawing in the following passage.It should be noted that attached drawing is adopted
With more simplified form and using non-accurate ratio, only to facilitate, lucidly aid in illustrating the embodiment of the present invention
Purpose.
As shown in Figure 1, film thickness control system of the present invention includes: to squeeze out unit 1, be cooled and shaped unit 2, draw unit 3, survey
Thick unit, monitoring control unit 5 and rolling unit 6 have die head 8 in extruder front end wherein squeezing out unit 1 includes extruder 7,
Draw unit 3 includes vertical drawing-die block 9 and horizontal drawing-die block 10, thickness measuring unit then include the first calibrator 401 and the second calibrator
402, monitoring control unit 5 includes acquisition module 11, processing module 12, control module 14, die head adjuster 15 and frequency converter 13.
Film raw material squeezes out for melt from die head 8 from melting after the feeding port of extruder 7 investment, then through being cooled and shaped unit
2 are cured as slab, and slab drawn unit 3 is stretched as after wide volume film by the harvesting of rolling unit 6 being parent roll, subsequent to want by order
It asks and parent roll is cut and is packed.Since thickness plays a crucial role product quality, it is raw in BOPP film
Thickness real-time monitoring often is carried out to slab and wide volume film respectively with two calibrators in production, two calibrators can be externally defeated
The thickness data collection of section out, while they are also connected with display to show the profile image of slab or wide volume film.Two
Front uses that of slab thickness measuring in pull-out at the beginning of film in calibrator, after the investment of the second calibrator below just temporarily
Stop using.
As shown in Fig. 2, the processing module 12 in film thickness control system of the present invention comprising calculation part 121, sentence knowledge portion 122,
Adjustment portion 123 and storage and output section 124.Acquisition module 11 is sent to after obtaining film profile thickness curve data from calibrator
Calculation part 121；The initial calculation of bolt location is carried out by calculation part 121, and in the abscissa subscript of thickness curve collected
Out, output token has the film profile thickness value set of diebolt position, is stored in storage and output section 124；Sentence knowledge portion
122, according to current film profile thickness value set, retrieve, identify bolt to be processed, pass through control module by adjustment portion 123
14, which issue instruction, carries out temperature control to the bolt to be processed in extruder, die lips aperture is adjusted, to adjust thin
Film thickness；Result progress quadratic search will be changed to the thickness after above-mentioned adjusting and differentiate and correspondingly adjust by sentencing knowledge portion 122 also
Bolt location updates storage and the content in output section 124.
In conjunction with shown in Fig. 2 and Fig. 3, the die head of extruder 7 includes upper and lower two lips 71, forms lip 73 between lips,
Lip opening size is adjusted by transversely arranged heat bolts 72.The present invention is to carry out the accurate positionin of diebolt, is needed
Dynamic regulation is carried out with auxiliary judgment to the part bolt 72 on extruder die head.
The collected film profile thickness curve data of acquisition module institute, can be the numerical string arranged by certain format,
It is also likely to be to be presented with film profile image format, the calibrator as is to be conveyed to display with VGA image.Such as Fig. 4
It is shown, in the film profile data acquired with image format i.e. film profile image, there are two width sectional thickness curve graphs respectively
With some character informations；Wherein, a-quadrant indicates the corresponding thickness a reference value 35.5um of film thickness profile axis of abscissas and curve
The longitudinal coordinate scale value 5% of coordinate system in picture；The region C is the target thickness curve for stating current film profile, coordinate
Axis is set by the description of a-quadrant, and the auxiliary line parallel with reference axis is also contained in coordinate system；AVG=in B area
35.51um refers to the thickness average value of current film profile shown by C region curve, and R=2.83% is then curve wave up and down
The very poor value of dynamic statistics.
In conjunction with shown in Fig. 4 to Fig. 5, during thickness control, processing module wants output token to have the thin of diebolt position
Film sectional thickness value set, film profile image has above-mentioned Block Characteristic as based on it, the present invention is based on spiral shells
The calculation part of processing unit, inside sets curve segmentation sub-block in the self-positioning film thickness monitoring system of bolt, reads from system or from figure
A continuous whole and achiasmate film thickness curve is extracted as in, and according to the reference read offline from systemic presupposition value
Its pixel coordinate conversion in the picture is corresponding thickness value to the point on the curve by value.
As shown in figure 5, curve segmentation sub-block for the region C in Fig. 4, carries out gray processing and filtering to target image first
Processing obtains discontinuous film thickness curve image g1 and auxiliary dot matrix image g2 further according to color component and translation specifications；Secondly, into
The segmentation of row gradient threshold obtains two-value after carrying out Otsu Threshold segmentation and Double Thresholding Segmentation respectively that is, to two images g1 and g2
Change image g1 ' and g2 '；Then, g1 ' is mutually merged with g2 ' the two and generates a continuous whole and achiasmate film thickness curve graph
As g；Finally, according to the acquired root thickness value, coordinate scale value, thickness average value, on generated film thickness curve
Point, by its pixel coordinate conversion in the picture be corresponding thickness value.
After obtaining film profile thickness value, needing to carry out film thickness curve bolt location mark just can be carried out effective film
Thickness control, but traditional bolt location mark needs manually to position, and this will introduce deviation.It is illustrated in figure 6 extruder die
Hook bolt deviations schematic diagram, wherein the case where when Fig. 6 a gives bolt physical location on the left of estimated location, Fig. 6 b is given
The case where when having gone out bolt physical location on the right side of estimated location.In figure, middle part horizontal linear is the corresponding ginseng of setting thickness value
Line is examined, curve is the thickness curve being calculated, and the triangle of following above and illustrates estimation and actual bolt location respectively.
BOPP film produces during slab horizontal drawing, and draw ratio is 7-9 times, and for the wide volume specification of such as 8280mm, slab is wide
Degree is about 1000mm, and when diebolt is 39, it is about 25mm that each bolt, which corresponds to slab width, and it is comparatively solid to remove both ends
Fixed bolt, each corresponding width in figure of adjusting bolt in middle part are essentially identical.
It can be seen that from Fig. 6 a when estimated location is to the right, estimate bolt its physical location at the place J with K in J1, K1
Place, wherein the deviation of bolt is positive value at J1, but since its estimated location is at J, will be because by J when carrying out thickness adjusting
Deviation increases aperture controlling die lips aperture and thickens, i.e., the deviation of film thickness not but not reduces at J1 bolt, will also
Increase；Similarly, the film thickness deviation at K1 bolt will keep die lips aperture without subtracting because controlling by deviation at K
It is small.When bolt estimated location is to the left, as shown in Figure 6 b, identical problem will also occur, the film thickness of position is inclined at bolt R1, S1
Difference will further increase deviation because being controlled respectively by deviation at R, S, and the film thickness deviation of position is then and at K at bolt T
Similar, deviation will not reduce.
For this purpose, in order to enable film thickness monitoring can converge to zero-deviation without vibrating repeatedly up and down in zero-deviation, it should make
Bolt estimated location is obtained as far as possible close to physical location.The present invention passes through the specific bolt of dynamic regulation and is judged according to regulating effect
Estimated location is to the left or to the right.
As shown in FIG. 7 and 8, when diebolt estimated location is to the left or to the right, film thickness regulating effect will be different.Two
In figure, X-axis indicates that deviation Reference line, straight line AB indicate the film thickness curved section between two estimations bolt location A and B, do not lose one
As property, it is assumed that A and B is symmetrical about X-axis and thickness value therebetween is linearly distributed；P point is the intersection point of AB and X-axis, to work as
Leading zero deviation point.C and D point is respectively the physical location of corresponding two bolts of estimated position A and B, i.e., carries out by deviation at A, B
Bolt adjust, will actually be respectively occurring at C, D at, it is wherein a left side in Fig. 7 that straight line CD, which is that straight line AB moves horizontally parallel lines,
Move and to move to right in Fig. 8；M point is the intersection point of CD and X-axis.In figure, U, V and E and F, G are the distal point for assisting arrow, straight line FG
To carry out new film thickness curved section after ratio control and regulation based on deviation at A, B to bolt at C, D two, the intersection point of FG and X-axis is Q
Point, each vertical arrows are the change of film thickness after ratio control, dMFor the estimated bias value of bolt location, dzfFront and back is controlled for ratio
Zero-deviation point displacement.
As shown in figure 9, the self-positioning workflow of the bolt of apparatus of the present invention are as follows:
(S1) system initialization is carried out first, sets period, threshold value；
(S2) film profile thickness curve data, the corresponding thickness value of calculated curve are acquired from calibrator；
(S3) turn S4 if existing location data, otherwise carry out initial alignment, it is after artificial opposite side, each bolt is equal
Film profile thickness value collection that is even to be distributed on curve horizontal axis, updating fastener locations set and be marked with diebolt position
It closes, turns S7 later；
(S4) then turn S5 if not the search cycle, otherwise carry out bolt retrieval, search for the positive and negative contrary sign of all thickness deviations
Adjacent bolt combination, and select the smallest group echo of the difference of wherein thickness deviation be (Mj1, Mj2) conduct spiral shell to be processed
Bolt control in the ratio of respective thickness deviation to two bolts, while recording two by adjustment portion by control module
The abscissa XP for the point that thickness deviation is zero between bolt, turns S7 later；
(S5) if not the period is differentiated, then turn S6, otherwise carry out the judgement and adjusting of bolt location estimated bias, again
The zero bias retrieved between bolt (Mj1, Mj2) are not good enough, remember that its abscissa is XQ；Compare XQ and XP, if the two difference is being set
In threshold range, then turn S8；All bolts are moved to right if XQ is less than XP, otherwise move to left all bolts, update bolt positioning
Location sets and the film profile thickness value set for being marked with diebolt position, turn S7 later；
(S6) current to control the period, the horizontal and vertical consistency of thickness control of film is carried out to each bolt by control module
System, turns S7；
(S7) it waits next period to arrive, turns S2；
(S8) positioning finishes, and terminates.
After aforementioned proportion control and consistency control, extruder lip aperture changes, the thickness of extrusion molding slab
It is accordingly adjusted, Thickness sensitivity is carried out by calibrator after slab drawn, correspondingly, the thickness information that acquisition module obtains is not yet
It is disconnected to be refreshed.The period is differentiated after the search cycle, and delay therebetween is measured according to production.
Preferably, in automatic bolt position fixing process, the search cycle and differentiate that the time span in period can be according to working as cephacoria
Thick population deviation is adjusted, within the search cycle, other bolts farther away from bolt to be processed still can by control module into
The general consistency control of row, and automatic positioning can also repeat according to Thickness Variation.
It is each adjustable to middle part on extruder die head for the judgement for carrying out bolt location estimated bias in conjunction with shown in Fig. 7~9
Bolt is saved, is retrieved based on current estimated location, finds nearest from thickness reference line and the positive and negative contrary sign of deviation a pair of of spiral shell
Bolt carries out ratio control to them.As shown in fig. 7, practical bolt location is on the left of estimated location, it is inclined at hypothesis A, B two in figure
Difference is equal, then after carrying out ratio controls to two bolts of C, D, at two the knots modification of thickness by respectively with A as shown in Figure 7b,
Arrow at B two is consistent, i.e., is arrow U and V by the arrow horizontal left at A, B two.So, as shown in Figure 7 c, practical at A to obtain
To regulated quantity will be the corresponding component as shown by arrow A in triangle MUC of location A.As shown in figure 7d, by arrow E and V
Head end moves to the subpoint of A point and D point on straight line AB respectively, obtains arrow F and G, then FG is to be based on to bolt at C, D two
A, film thickness curved section new after deviation progress ratio control and regulation at B.Fig. 7 a is the complex chart of Fig. 7 b, 7c and 7d, Fig. 8 and Fig. 7
It is similar.
As can be seen from Figures 7 and 8, the intersection point Q of FG and X-axis, position on the left of P point or right side, the position depending on M
It sets, Q and the M points of two sides in the not good enough P of former zero bias.Therefore, it in automatic bolt position fixing process, when finding that Q is on the right side of P, says
Bright original bolt estimated location is to the right, it should move to left estimated location, as shown in Figure 7；Conversely, estimated location should then be moved to right,
As shown in Figure 8.
To select suitable estimated location displacement, preferably, bolt location can be established in advance by test experiment
Estimated bias value dMFront and back zero-deviation point displacement d is controlled with ratiozfBetween mapping table, when on-line control, first count
Calculate current dzfThen estimated bias value d is obtained by tabling look-upM。
Preferably, bolt location estimated bias dMIt is adjusted as the following formula:
dM=η dzf (1)
Wherein, coefficient η dynamic value, initial value is a number in section (1/3,1/2), if detecting d laterzf
Direction change, take the η of η '=1/2, otherwise the η of η '=1.1, η ' be updated coefficient.
The estimated bias value d of bolt locationMFront and back zero-deviation point displacement d can be also controlled according to ratiozfIt is asked by equation
Solution obtains, by taking Fig. 7 as an example:
Assuming that A, B are in the thickness value T before ratio controlA=TB=T, after carrying out ratio control in its deviation, thickness changes
Variable tA=tB=Δ；Then have:
TC=TD=T, tC=tD=Δ；Remember dM=x, dzf=d, | PA |=L, ratio control after, F and G place thickness value divide
Not are as follows:
In the similar triangles that straight line FG and X-axis are formed, have:
It can obtain:
Δ·x2- 2 Δ Ld=0 (4) of+x (Δ d+dT-2 Δ L)
Remember that a=Δ, b=Δ d+dT-2 Δ L, c=2 Δ Ld can obtain it after then solving to formula (4)
Unique reasonable normal solution:
Estimated bias value d can be calculated by (5) formulaM。
Therefore, preferably, bolt location estimated bias dMAdjusting method it is as follows: dM=ρ x, wherein x is by formula (5)
Calculated value, ρ are a number in section [0.8,1].
In conjunction with shown in Fig. 9 and Figure 10, the horizontal and vertical consistency of thickness of the BOPP film of film thickness control system of the present invention
Control flow are as follows:
(L1) be cooled and shaped after melt extrusion as slab, slab before the stretching after Thickness sensitivity carried out by calibrator, it is raw
At film profile image；
(L2) acquisition module monitored in control unit acquires film profile image, is carried out by processing module to the image
Reason analysis, obtains the film profile thickness value set for being marked with diebolt position, wherein diebolt position is by processing unit
It is adjusted by self-positioning process；
(L3) to each element corresponding with bolt to be controlled in the thickness value set, k-th of data is taken, by it
Thickness value is compared acquisition point deviation with product thickness preset value, which send the controller 2 of control module, by controller 2
PID control is carried out, control amount is exported by die head adjuster and adjusts this bolt heating pulse waveform, to adjust this section of die head lip
The aperture of mouth；
(L4) to the thickness value set obtained in L2, calculate film profile thickness average value in this period, by its with
Product thickness preset value, which is compared, obtains this period integral thickness deviation, which send the controller 1 of control module, by controlling
Device 1 carries out PID control, and output control amount adjusts frequency converter, changes extruder revolving speed, to adjust in the die head whole unit time
Extrusion flow, that is, extruded velocity；
(L5) it waits next period to be timed to come, returns to step L2.
In the above control process, controller 1 is periodically averaged laterally upper film thickness data, converts as list
Position time extrusion output, compared with extrusion output corresponding with product thickness setting value, obtains extrusion output deviation, then is transformed into motor speed
Compensation rate is spent, controls the revolving speed of main extruder by changing the input quantity of frequency converter.When motor speed increases, extruder die
The melt flow of head lip increases, and pressure increases, and the film integral thickness after corresponding slab and stretching can gradually increase.
Thickness deviation is converted to temperature compensation value by controller 2, is controlled in a manner of impulse wave die head adjuster
The on-off of solid-state relay on computer heating control channel, to control the temperature of current diebolt.Due to expanding with heat and contract with cold for metal
Property, the gap compression of slab lip when heater conducting, the film thickness of such slab lip can be gradually reduced, it is on the contrary then
Increase.
Control module further include control vertical drawing, the speed of each roller and the submodule of temperature in horizontal drawing and rolling unit,
It is adjusted according to production film thickness according to preset technological parameter.
Preferably, the impulse wave is PWM wave or PFM wave.It is as shown in figure 11 lateral film thickness adjustment signal schematic diagram,
Controller 2 can PFM wave by PWM wave as shown in fig. 11a or as shown in figure 11b instruct.Wherein, the week of PWM wave
Phase TSIt remains unchanged, by changing turn-on time T in a periodONTo adjust control amount；And to be then held on the time constant by PFM,
Control amount is adjusted by changing the size in period.Preferably, in the fabrication process, PWM mode can be selected when heating frequent,
Otherwise optional PFM mode.
The present invention is based on the self-positioning film thickness monitoring systems of bolt to carry out thickness proportion by preferably specific one group of bolt
It adjusts, and bolt estimated location is adjusted according to the variation for adjusting front and back film thickness, quickly diebolt can be carried out quasi-
Determine position, output token has the film profile thickness value number of all diebolt positions to set；Based on the thickness value number pair
Set, control module carry out the aperture control and extruded velocity control of die lips, and the transverse gage for realizing film production is high
Uniformity simultaneously makes longitudinal thickness keep high consistency.
In addition to this, although embodiment is separately illustrated and is illustrated above, it is related to the common technology in part, in this field
Those of ordinary skill apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and record is not known
Content, then can refer to another embodiment on the books.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (7)
1. a kind of film thickness monitoring system self-positioning based on bolt comprising squeeze out unit, be cooled and shaped unit, draw unit,
Thickness measuring unit, monitoring control unit and rolling unit, the extrusion unit includes extruder and die head, and the draw unit includes
Vertical drawing-die block and horizontal drawing-die block, the thickness measuring unit include the first calibrator and the second calibrator, and film raw material melt is from extrusion
Machine is cooled and shaped unit and is cured as slab after squeezing out, slab drawn unit is received and kept after being stretched as wide volume film by rolling unit
For parent roll, first calibrator and the second calibrator are located at draw unit both ends and carry out to the slab and wide volume film
Thickness monitor, it is characterised in that:
The monitoring control unit includes acquisition module, processing module, control module, die head adjuster and frequency converter, described to adopt
Collection module sends processing module to after acquiring film profile thickness curve data from thickness measuring unit, processing module, which calculates, obtains film
The position of thickness and estimation each bolt of extruder die head, and estimated position, control module receiving area are adjusted by self-positioning processing
The label of reason module output has after the film profile thickness value set of position respectively by frequency converter and die head adjusting
The aperture of device control extruder revolving speed and die head；
The processing module includes calculation part, sentences knowledge portion, adjustment portion and storage and output section, and the calculation part estimates extruder spiral shell
Bolt position, and thickness value at each bolt is calculated based on thickness curve collected, it is described to sentence the retrieval of knowledge portion, identify spiral shell to be processed
Bolt, and adjustment bolt position, the adjustment portion carry out temperature adjusting to bolt to be processed, issue an instruction to change by control module
Become the aperture of extruder lip；
The adjacent bolt combination sentenced knowledge portion and retrieve the positive and negative contrary sign of all thickness deviations in the search cycle, selection combination internal difference
Not minimum one group is adjusted this group of bolt as bolt to be processed, and by the adjustment portion.
2. a kind of film thickness monitoring system self-positioning based on bolt according to claim 1, which is characterized in that the film
Sectional thickness curve data is expressed with film profile image format, includes one indicated in different colors respectively in described image
Film thickness curve, reference axis and the auxiliary line parallel with reference axis.
3. a kind of film thickness monitoring system self-positioning based on bolt according to claim 1, which is characterized in that the control
Module includes controller 1 and controller 2, and the controller 2 controls die head spiral shell die head adjuster in a manner of impulse wave
The on-off of bolt solid-state relay, thus the aperture of die head section where adjusting the bolt by the temperature for controlling bolt, to realize
The thickness of film section corresponding to the bolt is adjusted；The controller 1 controls turning for extruder in a manner of adjusting frequency converter
Speed, to realize the adjusting of film ensemble average thickness by control extrusion output.
4. a kind of film thickness monitoring system self-positioning based on bolt according to claim 1, which is characterized in that described to sentence knowledge
Portion carries out detection differentiation to the film thickness after the adjusting, according to the movement of zero-deviation position within the scope of the bolt combination come
Bolt location is adjusted, and is updated storage and output section content.
5. a kind of film thickness monitoring system self-positioning based on bolt according to claim 3, which is characterized in that the pulse
Wave uses PWM or PFM wave.
6. a kind of bolt method for self-locating, which is characterized in that thickness proportion adjusting is carried out by preferably specific one group of bolt, and
Bolt estimated location is adjusted according to the variation for adjusting front and back film thickness comprising following steps:
(S1) system initialization sets period, threshold value；
(S2) film profile thickness curve data, the corresponding thickness value of calculated curve are acquired from calibrator；
(S3) turn S4 if existing location data, otherwise carry out initial alignment, after artificial opposite side, each bolt is uniformly divided
Cloth is on curve horizontal axis, the film profile thickness value set for updating fastener locations set and being marked with diebolt position,
Turn S7 later；
(S4) then turn S5 if not the search cycle, otherwise carry out bolt retrieval, search for the phase of the positive and negative contrary sign of all thickness deviations
Adjacent bolt combination, and the smallest group echo of the difference of wherein thickness deviation is selected to be used as bolt to be processed for (Mj1, Mj2), by
Adjustment portion control in the ratio of respective thickness deviation to two bolts by control module, at the same record two bolts it
Between thickness deviation be zero point abscissa XP, turn S7 later；
(S5) if not the period is differentiated, then turn S6, otherwise carry out the judgement and adjusting of bolt location estimated bias, retrieve again
Zero bias between bolt (Mj1, Mj2) are not good enough, remember that its abscissa is XQ；Compare XQ and XP, if the two difference is in given threshold
In range, then turn S8；All bolts are moved to right if XQ is less than XP, otherwise move to left all bolts, update fastener locations
The film profile thickness value set for gathering and being marked with diebolt position, turns S7 later；
(S6) positioning is not dealt with, and is carried out PID adjusting to each bolt to realize that film thickness consistency controls by control module, is turned S7；
(S7) it waits next period to arrive, turns S2；
(S8) positioning finishes, and terminates.
7. a kind of bolt method for self-locating according to claim 6, which is characterized in that the bolt location estimated bias dM
Adjusting carry out as follows: dM=η dzf, wherein dzfFront and back zero-deviation point displacement, coefficient η dynamic are controlled for ratio
Value, initial value are a number in section (1/3,1/2), if finding d laterzfDirection η '=1/2 when changing
η, otherwise the η of η '=1.1, η ' are updated coefficient；
Or the bolt location estimated bias dMAdjusting carry out as follows: dM=ρ x, ρ are one in section [0.8,1]
Number, x are the positive number solution by following equation:
Δ·x2+ x (Δ d+dT-2 Δ L) -2 Δ Ld=0
Wherein, T and Δ are respectively the film thickness and thickness regulated quantity in ratio control leading zero deviation point two sides symmetric position, L
For the position and zero bias it is not good enough at a distance from, d is that ratio controls front and back zero-deviation point displacement.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910633998.1A CN110421823B (en) | 2017-05-28 | 2017-05-28 | Self-positioning method for bolt |
| CN201710429903.5A CN107379494B (en) | 2017-05-28 | 2017-05-28 | A kind of the film thickness monitoring system and bolt method for self-locating self-positioning based on bolt |
| CN201910628135.5A CN110370600B (en) | 2017-05-28 | 2017-05-28 | Film thickness control system based on bolt self-positioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710429903.5A CN107379494B (en) | 2017-05-28 | 2017-05-28 | A kind of the film thickness monitoring system and bolt method for self-locating self-positioning based on bolt |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910628135.5A Division CN110370600B (en) | 2017-05-28 | 2017-05-28 | Film thickness control system based on bolt self-positioning |
| CN201910633998.1A Division CN110421823B (en) | 2017-05-28 | 2017-05-28 | Self-positioning method for bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107379494A CN107379494A (en) | 2017-11-24 |
| CN107379494B true CN107379494B (en) | 2019-07-30 |
Family
ID=60332084
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910633998.1A Expired - Fee Related CN110421823B (en) | 2017-05-28 | 2017-05-28 | Self-positioning method for bolt |
| CN201710429903.5A Active CN107379494B (en) | 2017-05-28 | 2017-05-28 | A kind of the film thickness monitoring system and bolt method for self-locating self-positioning based on bolt |
| CN201910628135.5A Active CN110370600B (en) | 2017-05-28 | 2017-05-28 | Film thickness control system based on bolt self-positioning |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910633998.1A Expired - Fee Related CN110421823B (en) | 2017-05-28 | 2017-05-28 | Self-positioning method for bolt |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910628135.5A Active CN110370600B (en) | 2017-05-28 | 2017-05-28 | Film thickness control system based on bolt self-positioning |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN110421823B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018111766A1 (en) | 2018-05-16 | 2019-11-21 | Windmöller & Hölscher Kg | Method for the automated control of the size of a gap of a nozzle arrangement and control and / or regulating system |
| DE102018127669A1 (en) * | 2018-11-06 | 2020-05-07 | Windmöller & Hölscher Kg | Process for changing the production of a flat film machine from an input product to a subsequent product |
| DE102018127671A1 (en) | 2018-11-06 | 2020-05-07 | Windmöller & Hölscher Kg | Procedure for the control of a thickness profile of a film web |
| DE102018127673A1 (en) * | 2018-11-06 | 2020-05-07 | Windmöller & Hölscher Kg | Method for the control of a nozzle gap of an outlet nozzle for a film web of a flat film machine |
| DE102018127670A1 (en) | 2018-11-06 | 2020-05-07 | Windmöller & Hölscher Kg | Actuating device for checking an exit thickness of a nozzle exit gap of a flat film machine |
| CN112936924B (en) * | 2019-12-10 | 2023-01-20 | 财团法人纺织产业综合研究所 | Method for manufacturing plastic film |
| TWI753331B (en) * | 2019-12-10 | 2022-01-21 | 財團法人紡織產業綜合研究所 | Fabrication apparatus and manufacturing method of plastic film |
| CN113715301B (en) * | 2021-11-02 | 2022-01-25 | 浙江双元科技股份有限公司 | Alignment system and method for die bolt in film thickness measurement |
| CN117863422A (en) * | 2024-01-18 | 2024-04-12 | 钛玛科（北京）工业科技有限公司 | Automatic measurement control system for film thickness of casting machine |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5844463B2 (en) * | 1975-09-18 | 1983-10-03 | 三菱樹脂株式会社 | Netsukaso Seiji Yushifilm Noatsusachiyouseihohou |
| JPS54146859A (en) * | 1978-05-10 | 1979-11-16 | Mitsubishi Heavy Ind Ltd | Thickness control and its device |
| JPS6050133B2 (en) * | 1981-11-05 | 1985-11-07 | 東芝機械株式会社 | How to adjust the gap between the caps |
| JPS61284417A (en) * | 1985-06-11 | 1986-12-15 | Toshiba Mach Co Ltd | Control of profile of plastic sheet and the like |
| JP3828950B2 (en) * | 1995-12-15 | 2006-10-04 | 東芝機械株式会社 | Method for calculating position corresponding to die bolt on biaxially stretched film and method for controlling thickness of biaxially stretched film using the same calculation method |
| CN2496640Y (en) * | 2001-08-14 | 2002-06-26 | 潘金巧 | Mould head accurate-adjustment apparatus of film-blowing machine |
| JP4719614B2 (en) * | 2006-04-28 | 2011-07-06 | 株式会社日本製鋼所 | Position association apparatus and position association method |
| CN200963893Y (en) * | 2006-04-28 | 2007-10-24 | 宋成根 | Casting nozzle for processing adjustable thin film |
| CN201094009Y (en) * | 2007-06-22 | 2008-07-30 | 北京化工大学 | Full-automatic reciprocating wide breadth X ray thin membrane thickness measuring instrument |
| CN101249721B (en) * | 2008-03-13 | 2010-09-08 | 华南理工大学 | Extrusion blow moulding wall-thickness on-line control system based on image recognition technology and method thereof |
| CN103522552B (en) * | 2013-11-04 | 2015-07-22 | 上海市塑料研究所有限公司 | Fluorine-containing thin film tape casting preparing method |
| CN203766002U (en) * | 2014-04-03 | 2014-08-13 | 山东胜通集团股份有限公司 | Online thickness detection control system of polyester optical films |
| CN204505824U (en) * | 2015-03-17 | 2015-07-29 | 浙江新高包装有限公司 | A kind of film production assists thickness conditioning equipment |
| CN104827646B (en) * | 2015-05-20 | 2017-04-12 | 江门市辉隆塑料机械有限公司 | Device and method for regulating longitudinal thickness evenness of extrusion compound film |
-
2017
- 2017-05-28 CN CN201910633998.1A patent/CN110421823B/en not_active Expired - Fee Related
- 2017-05-28 CN CN201710429903.5A patent/CN107379494B/en active Active
- 2017-05-28 CN CN201910628135.5A patent/CN110370600B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110370600A (en) | 2019-10-25 |
| CN110421823B (en) | 2022-01-28 |
| CN107379494A (en) | 2017-11-24 |
| CN110421823A (en) | 2019-11-08 |
| CN110370600B (en) | 2021-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107379494B (en) | A kind of the film thickness monitoring system and bolt method for self-locating self-positioning based on bolt | |
| CN203766002U (en) | Online thickness detection control system of polyester optical films | |
| CN107322905B (en) | A kind of film thickness monitoring method self-positioning based on bolt | |
| CN110667080B (en) | BOPP film thickness fuzzy control system | |
| CN107310173B (en) | The character of film thickness monitoring system and film profile image extracts and film thickness acquisition method | |
| CN107175808B (en) | BOPP film thickness uniformity control method | |
| CN107399072B (en) | BOPP extruder die head bolt positioning method based on Thickness sensitivity | |
| JPH09164582A (en) | Thickness controlling method of biaxially oriented film | |
| CN107053638B (en) | A kind of BOPP extruder die head bolt positioning device based on Thickness sensitivity | |
| CN107297883B (en) | Film thickness measuring auxiliary locator and its synchronous method with film thickness detector | |
| CN107144249B (en) | A kind of film thickness monitoring system self-positioning based on bolt | |
| CN107053637B (en) | A kind of film thickness monitoring system based on marking auxiliary positioning | |
| CN107187001B (en) | A kind of film thickness monitoring method self-positioning based on bolt | |
| CN107238363B (en) | Film thickness monitoring method based on measured film thickness auxiliary positioning | |
| EP4385712A1 (en) | 3d printing control method and apparatus, and electronic device | |
| CN114953306A (en) | Color composite rubber belt calendering process quality control system | |
| CN115302678A (en) | Method for controlling casting technological parameters of packaging material for plastic molding | |
| CN107253320B (en) | BOPP film thickness fuzzy control method | |
| CN107097394A (en) | Film thickness monitoring method based on marking auxiliary positioning | |
| CN107202563B (en) | Film thickness monitoring system based on measured film thickness auxiliary positioning | |
| JP2004122434A (en) | Profile control method for film sheet | |
| CN107179687B (en) | BOPP film thickness uniformity controller | |
| JP2002086539A (en) | Sheet manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 312030 Jingshui Road 889, Kedong High-tech Park, Keqiao Street, Shaoxing City, Zhejiang Province Applicant after: ZHEJIANG KINLEAD INNOVATIVE MATERIALS CO., LTD. Address before: 312030 Jingshui Road 889, Kedong Industrial Zone, Shaoxing County, Zhejiang Province Applicant before: ZHEJIANG KINLEAD INNOVATIVE MATERIALS CO., LTD. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |