US20160193774A1 - Apparatus And Method For Automatically Analyzing Extruded Films - Google Patents

Apparatus And Method For Automatically Analyzing Extruded Films Download PDF

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Publication number
US20160193774A1
US20160193774A1 US14/911,796 US201414911796A US2016193774A1 US 20160193774 A1 US20160193774 A1 US 20160193774A1 US 201414911796 A US201414911796 A US 201414911796A US 2016193774 A1 US2016193774 A1 US 2016193774A1
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Prior art keywords
film
neck
lateral position
width
extrusion lip
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Abandoned
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US14/911,796
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English (en)
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Florinda Martena
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Electronic Systems SpA
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Electronic Systems SpA
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Priority to US14/911,796 priority Critical patent/US20160193774A1/en
Assigned to ELECTRONIC SYSTEMS S.P.A. reassignment ELECTRONIC SYSTEMS S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MARTENA, FLORINDA
Publication of US20160193774A1 publication Critical patent/US20160193774A1/en
Abandoned legal-status Critical Current

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    • 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
    • B29C47/92—
    • B29C47/0021—
    • B29C47/0069—
    • 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
    • B29C48/0023—Combinations of extrusion moulding with other shaping operations combined with printing or marking
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • B29C48/31—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets being adjustable, i.e. having adjustable exit sections
    • B29C48/313—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets being adjustable, i.e. having adjustable exit sections by positioning the die lips
    • B29C2947/92133—
    • B29C2947/92152—
    • B29C2947/92447—
    • B29C2947/92628—
    • B29C2947/92647—
    • B29C2947/92904—
    • 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
    • B29C2948/92133—Width or height
    • 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
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92447—Moulded article
    • 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
    • B29C2948/92628—Width or height
    • 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
    • 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
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; Nozzle zone
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
    • 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
    • B29L2007/008—Wide strips, e.g. films, webs

Definitions

  • the present invention relates to an apparatus and a method for automatically analyzing extruded films, in particular stretched films, as well as to a system and method for automatically controlling a film extruder for manufacturing the extruded films.
  • EP 0 607 938 A1 relates to a method and apparatus comprising two magnetic sensors and one laser meter for measuring the thickness of a film which is manufactured by using a film extruder. More specifically, the apparatus comprises a scanning head that measures the thickness of the material combining the signal of an inductive sensor and a laser sensor. By using a calibration technique, the thickness of a film can be measured with high accuracy.
  • EP 0 035 356 A1 relates to a method and apparatus for controlling the thickness of an extruded, biaxially elongated film product.
  • the extruded film is elongated in a longitudinal direction, whereby the width becomes smaller.
  • the film is elongated in a lateral direction, whereby the width becomes wider than in the extruded state.
  • a correlation between positions along the widthwise direction of a film sheet and positions of die manipulation bolts of an extrusion die is obtained.
  • a profile of the film sheet prior to lateral elongation is converged into a tolerable range.
  • the thickness of the film sheet after lateral elongation is measured and if there are thickness deviations outside the tolerable range, thickness regulation is effected by transmitting a signal corresponding to the thickness deviations to appropriate ones of the die manipulation bolts.
  • the correlation between positions along the widthwise direction of the film product and positions of the manipulation bolts is obtained by determining a distance from an edge on the longitudinally elongated sheet and an edge along the laterally elongated sheet. This correlation result is then used for determining which one of the manipulation bolts are adjusted.
  • U.S. Pat. No. 5,411,695 relates to a method for producing a thermoplastic resin film. It particularly deals with the bowing phenomenon which occurs in the process of transverse drawing of the thermoplastic resin film. According to this document, the bowing phenomenon can be visualized by drawing straight lines on the surface of the film in the direction of transport. The bowing phenomenon can be reduced by not only considering manufacturing processes and apparatus but also by consideration of the characteristics of the film itself and by applying specific cooling in a cooling zone followed by heat setting of the film.
  • the calculation means determines the width of the film along the first line on the basis of the two lateral positions of the edges of the neck-in portion of the film. Furthermore, the calculation means determines the spatial relation between the at least lateral position at the extrusion lip and the respective lateral position at the neck-in portion on the basis of the width of the film along the first line preferably taking into account a width of an opening of the extrusion lip.
  • the mark can be created by intentionally changing the thickness at a certain position of the extruded film by changing the width at a certain position of the extrusion lip of the film extruder, by a forced lip.
  • the lateral position of the mark can be detected by using a thickness measurement at the neck-in portion.
  • a further aspect of the present invention relates to a system for automatically controlling the film extruder in particular for automatically controlling the thickness of extruded films, in particular of stretched films.
  • the system comprises an apparatus for automatically analyzing extruded films as described above. And furthermore it comprises control means for controlling individual adjusting means for adjusting the local width of the film extruder on the basis of the analysis of the extruded film.
  • Another aspect of the present invention relates to a method for automatically analyzing extruded films, in particular stretched films, wherein a neck-in portion is formed at each of both edges of the film at a specific distance from an extrusion lip of a film extruder along the longitudinal transport direction of the film.
  • an apparatus as described above is used.
  • the method according to this aspect comprises the steps of detecting, preferably continuously detecting the lateral position of one respective edge of the neck-in portion of the film using two edge detectors being arranged along a first line substantially transversal to the longitudinal direction and being spaced from each other by a specific distance.
  • the method comprises the step of storing at least one functional relationship.
  • This functional relationship can be defined as an equation which defines a relationship between at least one lateral position at the extrusion lip and a respective lateral position at the neck-in portion for a reference film having a specific width and thickness at the extrusion lip.
  • this functional relationship is defined for a specific material of the extruded film.
  • the method comprises the correction of the functional relationship on the basis of the two lateral positions of the edges of the neck-in portion of the film or on the basis of the width of the film. By using the corrected functional relationship, the spatial relation between at least one lateral position at the extrusion lip and the respective lateral position at the neck-in portion can be determined.
  • FIG. 1 shows a schematic perspective view of a system for manufacturing films according to an embodiment of the present invention
  • FIG. 2 shows a schematic diagram as a top view on the extruded film in the system of FIG. 1 ,
  • FIG. 3 shows a schematic diagram of the measurement result representing the thickness variation resulting from marks created on an extruded film
  • FIG. 4 shows a schematic perspective view of an apparatus for automatically analyzing extruded films according to an embodiment of the present invention
  • FIG. 5 a) and b) show a schematic perspective view of a system for manufacturing films according to another embodiment of the present invention
  • FIG. 6 shows a schematic diagram as a top view on the extruded film in the system of FIG. 5 .
  • FIG. 7 shows a schematic perspective view of an apparatus for automatically analyzing extruded films according to another embodiment of the present invention.
  • FIG. 1 shows a schematic view of a system according to an embodiment of the present invention.
  • FIG. 1 shows a film extruder 1 comprising an elongated extrusion lip 3 and a plurality of adjusting means 5 being arranged adjacent to each other along the width of the extrusion lip.
  • the adjusting means 5 can comprise respective bolts, and the adjusting means can be used for changing the width of the extrusion lip 3 and more specifically wherein individual adjustments can be made to adjust the thickness individually at specific parts of the extrusion lip.
  • FIG. 1 further schematically shows an extruded film 7 which exits the extrusion lip 3 and which is rolled on a chill roll 9 . As further schematically shown in FIG.
  • the extruded film has a wider width at the exit of the film extruder which substantially corresponds to the width of the extrusion lip 3 . Due to a thermal contraction the width of the extruded film is smaller when reaching the chill roll 9 . More specifically, due to this thermal contraction the extruded film comprises on the left lateral side a neck-in portion 7 a and on the right lateral side a neck-in portion 7 b.
  • the numbers depend for example on the width of the neck-in area or production and line conditions like viscosity of the material or mechanical dimensions of the production line.
  • a measurement sensor head 21 By using a measurement sensor head 21 along the measurement line X the thickness can be measured and the marks can be detected.
  • This measurement sensor head can move back and forth along the measurement line X to measure the thickness of the film over its whole width.
  • a second frame (not shown) may be arranged above the measurement line X along which the measurement sensor head traverses.
  • the air blow marking cycle can be initiated manually or automatically.
  • the air blow marking can be used continuously or in the case of events which are significant on the manufacturing of the extruded film in particular significant on the neck-in effect. For example, in case of a change of production, a change of the width of the film, a change of the distance between the dye and the chill roll and a change of vacuum box conditions the air blow marking cycle can be initiated.
  • the frame further comprises a lower beam 27 connecting the lower ends of the two side beams 23 a , 23 b .
  • the apparatus as schematically shown in FIG. 4 further comprises a first edge detector 31 a on the left side and a second edge detector 31 b on the right side, as shown in FIG. 4 .
  • the edge detectors are configured to perform a two-side measurement by using transmission of light.
  • the first edge detector 31 a comprises a lower connecting beam 33 a preferably an upright stand for supporting a lower array of optical transmitters 37 a .
  • the lower end of the lower connecting beam 33 a is connected to one side surface of the lower beam 27 of the frame.
  • the lower stand 33 a is positioned in the neighbourhood of the first side beam 23 a .
  • the second edge detector 31 b on the right-hand side of the frame similarly comprises a lower connecting beam 33 b for supporting a lower array of optical transmitters 37 b and an upper connecting beam 35 b for supporting an upper array of optical sensors 39 b .
  • the lower and the upper array of optical transmitters/sensors 37 b , 39 b including their respective connecting beams 33 b and 35 b are also arranged in a mirror-like relationship with respect to said horizontal surface which goes through the frame.
  • Both edge detectors 31 a on the left side and 31 b on the right side are arranged with respect to each other in a mirror-like relationship with respect to a vertical surface going through the frame perpendicular to its lower and upper beam.
  • an extruded film 7 is guided through a slit-like region present between the lower and the upper arrays of optical transmitters/sensors with a moving direction indicated with the letter “B”.
  • the first edge 7 a of the film shown on the left side of FIG. 4 is positioned between the lower array of optical transmitters 37 a and the upper array of optical sensors 39 a of the first edge detector 31 a .
  • the lateral position of the first edge 7 a is positioned between both lateral ends of the lower and the upper array 37 a , 39 a in such a manner, that the edge detector can detect the lateral position of the edge.
  • the second edge 7 b of the film 7 on the right side of FIG. 4 is positioned between the lower and the upper array of optical transmitters/sensors 37 b and 39 b of the second edge detector 31 b.
  • the film When manufacturing a film with a film extruder, the film can be analyzed by using the apparatus as shown in FIG. 4 .
  • This apparatus can be arranged along the axis “X” as shown in FIG. 2 .
  • the film is transported in the direction as indicated by the letter “B” in FIG. 4 .
  • the two edge detectors 31 a and 31 b continuously determine the position of the respective edges 7 a and 7 b of the films 7 .
  • the two gauging instruments 26 and 28 are measuring the thickness over the whole width of the film.
  • a substance preferably a liquid or paste-like material more preferably an ink or a resin is directed to the surface of the film to create a mark which is visible or invisible to the human eye.
  • the mark is positioned in a defined relationship with respect to a specific part of the extrusion lip.
  • ink is used from the list of substances as to describe the embodiment by example.
  • the ink can be of any material and/or color to create a mark on the extruded film which can be detected by an appropriate sensor, e.g.
  • the ink can be a fluorescent ink that is invisible for the human eye on the extruded film.
  • Fluorescent inks particularly suitable might either be UV curable or thermally dried. This has the advantage that the marked part of the extruded film can stay on the extruded film, i.e. it does not have to be cut away in post-processing.
  • the use of an ink spray nozzle is advantageous as there is no contact between the nozzle and the extruded film. Furthermore, the thickness of the film is not changed apart from the thin layer of ink deposited on the film.
  • FIG. 5 the ink with or without fluorescent characteristics will be put into a pressure vessel connected to an air pressure system with a pressure regulating valve in between.
  • An electric valve in the front of the spray nozzle 6 is provided to control the application of ink to the extruded film.
  • the ink spray nozzle 6 is situated in scanning traversing position on a beam that has a mechanical lay out and assembly compatible with the lay out and the assembly of the machinery (extrusion die plus chill roll) where it is mounted on.
  • the ink spray nozzle 6 is supported by a vertical translation to support the installation in narrow spaces. Furthermore, the ink spray nozzle 6 can have different spray angles and different spray volumes and can mark the film with correspondence to any specific part of the extrusion lip or the respective bolt, preferably one of the bolts at the extrusion lip in the border region.
  • FIG. 6 is an illustration showing the marking of the bolt 3 of the extrusion lip (indicated by the thick black line). As can be seen, the mark on the film follows the specific form of the neck-in portion.
  • necking-in occurs, i.e., a decrease of materials width when it is stretched.
  • the neck-in effect depends on many parameters like elongational viscosity of the film, production recipe parameters (thickness, polymer type etc.), distance between the die and chill roll, wherein the neck-in is a greater problem, when the distance is greater between the die and chill roll, because the polymer curtain travels more in the air gap without support.
  • detecting, measuring and mapping the neck-in is improved.
  • detecting, measuring and mapping the contraction of the polymer curtain in the cross-direction during the operation can be efficiently used to correctly control the extrusion die and consequently the thickness of the film.
  • the film or sheet produced by cast process is narrower than the die dimensions and tends to thicken at the edges. Any irregularities in the gauge of the film tend to be magnified when it is rolled up. Gauge variations can produce gauge bands in the roll that can cause difficulties in later converting operations.
  • sensors are used to monitor the thickness of the web (or film) on-line, using a scanning measuring head that travels across the film so that thickness can be measured along both the length and the width dimensions. The results of thickness measurements are fed back to the die permitting automatic computer-controlled adjustments to be made in the die dimensions to minimize unevenness in the thickness profile.
  • the dies are equipped with flow modifiers such as restrictor bars and adjustable lips, to adjust for processing variations such as changes in resin, extrusion temperature and flow rates.
  • the lip adjustments are computer-controlled and linked to in-line thickness measurements.
  • the present invention allows a correct control of the lip by knowing the correspondence between the band whose gauge has to be adjusted and the lip that creates it. To map such correspondence, the contraction of the film is mapped, i.e., by using the neck-in mapping.
  • the present invention has the advantage that disturbances like film shift, change of production, film contraction or shrinkage that effects randomly a negatively the equation solution f(x) are nullified and cancelled by using the continuous, real-time acquisition of the position of the edges.
  • the present invention allows for auto-mapping of the neck-in portion.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
US14/911,796 2013-08-14 2014-08-13 Apparatus And Method For Automatically Analyzing Extruded Films Abandoned US20160193774A1 (en)

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Application Number Priority Date Filing Date Title
US14/911,796 US20160193774A1 (en) 2013-08-14 2014-08-13 Apparatus And Method For Automatically Analyzing Extruded Films

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US201361865673P 2013-08-14 2013-08-14
EP13180387.6 2013-08-14
EP13180387.6A EP2837484B1 (fr) 2013-08-14 2013-08-14 Appareil d'analyse automatique de films extrudés
PCT/EP2014/067359 WO2015022375A1 (fr) 2013-08-14 2014-08-13 Appareil et procédé d'analyse automatique de films extrudés
US14/911,796 US20160193774A1 (en) 2013-08-14 2014-08-13 Apparatus And Method For Automatically Analyzing Extruded Films

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CN106584736A (zh) * 2016-12-17 2017-04-26 上海大觉包装制品有限公司 流延膜机出膜厚度预警及调节装置
US11006016B2 (en) * 2019-03-07 2021-05-11 Ricoh Company, Ltd. Image forming apparatus, image forming method, and storage medium
CN114829108A (zh) * 2019-10-03 2022-07-29 法商阿莱夫公司 一种制造包含空腔的薄膜且确定薄膜的拉伸、密度、厚度和/或孔隙率的分布的方法
US11446854B2 (en) * 2019-12-16 2022-09-20 Daniel R. Joseph Method and apparatus for calibration of blown-film extrusion apparatus

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US11524438B2 (en) * 2016-08-23 2022-12-13 Windmöller & Hölscher Kg Apparatus and method for film production and/or film processing
DE102018111765A1 (de) 2018-05-16 2019-11-21 Windmöller & Hölscher Kg Verfahren zur automatisierten Regelung der Größe eines Spaltes einer Düsenanordnung und Steuer- und/oder Regelsystem
DE102018111763A1 (de) * 2018-05-16 2019-11-21 Windmöller & Hölscher Kg Verfahren zur automatisierten Regelung der Größe eines Spaltes einer Düsenanordnung und Steuer- und/oder Regelsystem
DE102018111766A1 (de) 2018-05-16 2019-11-21 Windmöller & Hölscher Kg Verfahren zur automatisierten Regelung der Größe eines Spaltes einer Düsenanordnung und Steuer- und/oder Regelsystem
DE102018111764A1 (de) * 2018-05-16 2019-11-21 Windmöller & Hölscher Kg Verfahren zur automatisierten Regelung der Größe eines Spaltes einer Düsenanordnung und Steuer- und/oder Regelsystem
DE102018127670A1 (de) 2018-11-06 2020-05-07 Windmöller & Hölscher Kg Stellvorrichtung für eine Kontrolle einer Austrittsdicke eines Düsenaustrittsspaltes einer Flachfolienmaschine
DE102018127673A1 (de) 2018-11-06 2020-05-07 Windmöller & Hölscher Kg Verfahren für die Kontrolle eines Düsenspaltes einer Austrittsdüse für eine Folienbahn eine Flachfolienmaschine
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DE102018127671A1 (de) 2018-11-06 2020-05-07 Windmöller & Hölscher Kg Verfahren für die Kontrolle eines Dickenprofils einer Folienbahn
DE102018127672A1 (de) * 2018-11-06 2020-05-07 Windmöller & Hölscher Kg Verfahren für eine Kontrolle eines Randabschnitts einer Folienbahn
DE102020121364A1 (de) 2020-08-13 2022-02-17 Sml Maschinengesellschaft Mbh Verfahren zur Herstellung einer Kunststoff-Folie

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US20200353665A1 (en) 2020-11-12
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EP3033210B1 (fr) 2021-06-30
EP3033210A1 (fr) 2016-06-22

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