• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    To achieve a substantially uniform thickness of film extruded from or coated by a sheet die, the thicknesses of the film are measured over its width and the film is sub-divided widthwise into imaginary sections of equal length. Each film section is associated with a correcting section of the sheet die. If the thickness measurement reveals a thick or thin portion in a film section, the associated correcting section is cooled or heated, respectively. The mean thickness distributions are determined from the measurements and employed as a correcting signal for setting elements of the individual correcting sections.
    公开号:SU1093263A3
    申请号:SU813247950
    申请日:1981-02-16
    公开日:1984-05-15
    发明作者:Упмайер Хартмут
    申请人:Виндмеллер Унд Хельшер Аг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to a method for controlling the thickness of a film produced on extrusion plants for the production or laminating of films. The film obtained in pneumatic extrusion plants in the form of a sleeve and a flat film after production is wound up with the formation of rolls in order to store this film and transport it to the processing site. Upon receipt of the film, the formation of thick and thin places is usually not excluded, which, when coagulating the film into a roll, is summed up, as a result of which the rolls of the film are formed with a ring of different build-ups or decreases, therefore further processing of the film is complicated. With pneumatic film making, the flat-folded tubular film can be turned in the opposite direction up to 360 ° so that the likely thickening or thick spots are evenly distributed, as happens when the rope is twisted. However, the indicated distribution of thick spots in the production of flat films in flat extrusion plants is not possible, since even the smallest thickened spots when rolling a flat film into rolls form strongly pronounced sags or so-called piston rings. These sags have an unfavorable effect on the position of the molten film and quality when it is rolled out of coils, it is therefore necessary to develop such a method of controlling the thickness of a flat film, which would allow It is necessary to completely eliminate the formation of thick and thin places so that flat films can be rolled into cylindrical rolls. There is a known method for adjusting the TOL1EDY film, which includes dividing the film into sections over the entire width, measuring the thickness of the film in these areas, heating the areas of the film with a lower thickness and cooling the areas with a greater thickness. According to this method, the thickness of a flat film extruded from a slit head or a flat film laminated from a slit head is measured across the entire width and the flat film over its entire width is divided into equal portions, which correspond to the sections of the correction slit head from which they are extruded and cooled. , if the measurement of the corresponding areas of the film indicates the presence of thick spots, and which are heated, if the measurements indicate the presence of thin spots, and that measurements are obtained from Determining the thickness of individual sections of the film and the distribution of average thickness determine the magnitude of the signal for the adjustment for the executive units of the individual adjustment sections of the slit head, which correspond to one or other sections of the film. In accordance with the measured thick or thin spots of the film, heating or cooling is performed, or simultaneous heating or cooling of the corresponding correction portions of the slit head so that the corresponding changes in the viscosity of the extruded material eliminate the formation of thick and thin spots and form a generally uniform profile over the entire width of the obtained C13 film. However, the known method does not provide a film of equal thickness with high accuracy. The aim of the invention is to improve the flatness of the film. This goal is achieved by the fact that according to a known method, a portion of the film is determined either to a maximum or minimum thickness and, accordingly, to heat all other film sections with a smaller thickness until their thickness reaches the maximum measured value, or to cool film sections with a greater thickness to reach their minimum thickness. value. FIG. 1 is a diagram of an extrusion installation for producing a flat film, side view, FIG. 2 slit head with a schematic depiction of adjusting devices affecting the tempering chambers of the slit head, incision. The polymer melt obtained in the extruder 1, located on the housing 2, in the molten
    the state through the attachment 3 is fed into the slotted head 4, which guides it further through the supply channel 5, through the distribution channel 6 directly to the slit 7 when producing a flat film 8 (or to the slit when laminating the film The flat film 8 is cooled by the first cooling the cylinder 9 and after the passage of the second cooling roller 10 through the guide rollers 11, as well as the thickness measuring device 12 installed in the transverse direction, is fed to the winding coil 13c by winding devices 14 and 15. Through lazhdayuschy cylinder 9 can also be fed material .podlezhaschy lamination, thereby obtaining a laminate or film.
    In order to be able to clean the slit head 4, it is made collapsible from the halves 16 and 17 of the housing. At the very slit 7 on each side there are parallel-directed groups.
    - temperature drilled holes 18 and 19, which by changing the temperature of the walls affect these areas on the melt flow and thus on the private thickness
    films 8. The tempering medium (preferably air) is supplied by means of tubes 20 and 21, and discharged through outlet openings 22 and 23, and it is preferably trapped and sucked away. The tempering air is supplied from schematically shown blocks 24 and 25 with valves and tempering elements, where it is supplied by means of compressed air sources (not shown through pipelines 26 and 27
    The measurement signal of the transversely mounted device 12 for measuring the thickness of the film on the wires 28 is fed to the microprocessor 29 and is processed last. Through wires 30, a device 31 for recording the thickness can be connected, which in the form of a diagram of the image. The profile of the resulting flat film or extruded laminated film 32 is formed. The blocks 24 and 25 contain valves 33 used to cool the tempering medium and the heating elements 34 to heat the tempering medium environment.
    The device works as follows.
    In the manufacture of a film, the thickness of an extruded flat film is measured, and the entire film is divided across widths into uniform sections corresponding to corrective sections subjected to cooling or heating.
    The area of the film having a maximum thickness that is not affected is determined. All parts of the film that are less than the maximum thickness are heated to the maximum thickness.
    In another case, a portion of the film having a minimum thickness that is not affected is determined. All areas of the film, which have a thickness greater than the minimum, are cooled until their thickness becomes equal to the minimum value.
    Compared with the known method, the proposed method allows to increase the flatness of the film, since it is simpler, due to the fact that it is used to cool or heat sections of the film.
    And h
    thirty
    L
    权利要求:
    Claims (1)
    [1]
    METHOD FOR REGULATING THE FILM THICKNESS, including dividing the film into sections over its entire width, measuring the film thickness in these sections, heating the film sections with a smaller thickness and cooling the film sections with a larger thickness, characterized in that, in order to increase the uniform thickness of the film, determine the portion of the film or the maximum or minimum thickness and, accordingly, either heat all other sections of the film with a smaller thickness until their thickness reaches the maximum measured value, or cool the sections of the film ki with greater thickness to achieve a minimum thickness of their measured values ..
    with. " 1093263
    类似技术:
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    同族专利:
    公开号 | 公开日
    GB2070290B|1984-02-08|
    IT8119104D0|1981-01-13|
    JPS56135028A|1981-10-22|
    FR2476535A1|1981-08-28|
    US4426239A|1984-01-17|
    DE3006566A1|1981-08-27|
    DE3006566C2|1990-05-31|
    BR8100968A|1981-08-25|
    IT1135012B|1986-08-20|
    FR2476535B1|1984-11-16|
    GB2070290A|1981-09-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1479979B2|1962-10-11|1971-02-25|The Black Clawson Company, Hamilton, Ohio|HEATING DEVICE FOR A WIDE SLOT NOZZLE|
    BE642865A|1963-01-23|1900-01-01|
    US3341388A|1964-05-20|1967-09-12|Phillips Petroleum Co|Method and apparatus for the uniform extruding of thermoplastic film|
    US3557351A|1967-04-12|1971-01-19|Industrial Nucleonics Corp|Property measurement signal filtering method and apparatus for eliminating predetermined components|
    US3782873A|1968-09-20|1974-01-01|Du Pont|Thickness control apparatus for polymeric film structures|
    US3649726A|1968-09-20|1972-03-14|Du Pont|Method for controlling the thickness of polymeric film structures|
    US3761553A|1971-06-28|1973-09-25|Celanese Corp|Method for producing uniform drawn films|
    US3767346A|1971-07-22|1973-10-23|Fmc Corp|Film extrusion die|
    US3920365A|1972-08-15|1975-11-18|Du Pont|Apparatus for making polymeric film|
    GB1444757A|1972-08-15|1976-08-04|Du Pont|Process and apparatus for preparing polymeric film|
    GB1448669A|1972-09-08|1976-09-08|Bakelite Xylonite Ltd|Profile determining and/or controlling system|
    DE2553069C3|1974-11-27|1981-05-27|Teijin Ltd., Osaka|Slot nozzle for producing a polymer film of uniform thickness|DE3107701C2|1980-03-05|1987-12-10|Basf Ag, 6700 Ludwigshafen, De|
    US4454084A|1982-06-09|1984-06-12|Leesona Corporation|Extrusion die control system|
    JPS5989119A|1982-11-15|1984-05-23|Toshiba Mach Co Ltd|Detecting method of corresponding position|
    US4517145A|1983-11-07|1985-05-14|American Hoechst Corporation|Extrusion die and process for thickness control|
    NL8304451A|1983-12-27|1985-07-16|Wavin Bv|METHOD AND APPARATUS FOR CONTROLLING THE WALL THICKNESS OF EXTRUDED PLASTIC TUBE.|
    JPH0219773B2|1984-12-05|1990-05-07|Shigeru Tsutsumi|
    US4659424A|1986-04-09|1987-04-21|Northern Telecom Limited|Manufacture of elongate members of indefinite length|
    JPS6313732A|1986-07-07|1988-01-21|Showa Denko Kk|Manufacture of thermoplastic resin film|
    JPH0524814B2|1986-07-08|1993-04-09|Showa Denko Kk|
    JPS6317024A|1986-07-10|1988-01-25|Showa Denko Kk|Manufacture of thermoplastic resin film|
    DE3631503C1|1986-09-16|1987-09-24|Windmoeller & Hoelscher|Process for the production of rolls from extruded film webs|
    DE3708186A1|1987-03-13|1988-09-22|Hergeth Hubert|DEVICE AND METHOD FOR THE HIGH-PRECISION MEASUREMENT OF FIBER MATS|
    US4882104A|1987-04-03|1989-11-21|Cincinnati Milacron, Inc.|Method of controlling the thickness of an extruded plastic article|
    JPH0586902B2|1988-06-13|1993-12-14|Tomi Kikai Kogyo Kk|
    JPH0698671B2|1989-03-30|1994-12-07|トミー機械工業株式会社|Film thickness control device for melt extrusion film forming|
    DE68907907T2|1989-10-17|1993-11-11|Tomi Machinery Mfg Co Ltd|Synthetic resin film, method and device for making the film thickness uniform during molding.|
    DE3936239A1|1989-10-31|1991-05-02|Windmoeller & Hoelscher|RING NOZZLE FOR EXTRESS PRESSES, PREFERABLY FILM BLOW HEAD|
    DE4110060A1|1991-03-27|1992-10-01|Hoechst Ag|METHOD AND DEVICE FOR COMPARISONING THE THICKNESS OF A FILM|
    IT222712Z2|1991-07-23|1995-04-24|Deponte Edoardo|COOLING DEVICE FOR EXTRUSION HEADS FOR TUBULAR FILMS OF PLASTIC MATERIAL|
    DE4203755C2|1992-02-10|1995-04-20|Reifenhaeuser Masch|Process for regulating the individual layer thicknesses of a co-extruded multilayer plastic web|
    US5292463A|1992-09-03|1994-03-08|General Electric Company|Variable width film die|
    US5540774A|1992-10-19|1996-07-30|Illinois Tool Works Inc.|Drip proof dispensing method and nozzle assembly for dispensing viscous materials|
    US5462423A|1993-04-13|1995-10-31|Sencorp Systems, Inc.|Apparatus for non-mechanical die lip temperature adjustment in an extruder|
    JP3423077B2|1993-08-25|2003-07-07|ダブリュ・アール・グレイス・アンド・カンパニー・コネテイカット|Plate printing method|
    EP0765722A1|1995-09-28|1997-04-02|Siebolt Hettinga|Method for controlling skin thickness of plastic article made with controlled density|
    JP3214408B2|1997-09-09|2001-10-02|株式会社村田製作所|Method and apparatus for producing ceramic green sheet|
    JP2002059062A|2000-08-24|2002-02-26|Konica Corp|Extrusion coating method, extrusion coating device|
    DE10244869B4|2002-09-25|2007-06-06|Windmöller & Hölscher Kg|Control panel for film extrusion lines|
    JP3847297B2|2003-12-25|2006-11-22|Ｙｋｋ株式会社|Surface fastener continuous forming method and forming apparatus|
    US20090146346A1|2007-12-05|2009-06-11|Fujifilm Corporation|Apparatus for manufacturing thermoplastic resin film, and method for manufacturing thermoplastic resin film|
    US20090179356A1|2008-01-14|2009-07-16|Ama, Inc.|Low Haze Thermoplastic Films, Methods and Manufacturing System For Forming the Same|
    JP5333441B2|2008-03-27|2013-11-06|コニカミノルタ株式会社|Optical film manufacturing method and manufacturing apparatus|
    US20130154142A1|2011-12-19|2013-06-20|Warren Paul Ripple|Conicity correction for rubber component extrusion|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3006566A|DE3006566C2|1980-02-21|1980-02-21|
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