US3443322A - Method for controlling the drying steps on continuous sheet of material - Google Patents

Method for controlling the drying steps on continuous sheet of material Download PDF

Info

Publication number
US3443322A
US3443322A US662456A US3443322DA US3443322A US 3443322 A US3443322 A US 3443322A US 662456 A US662456 A US 662456A US 3443322D A US3443322D A US 3443322DA US 3443322 A US3443322 A US 3443322A
Authority
US
United States
Prior art keywords
water
moisture content
drying
temperature
roll
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.)
Expired - Lifetime
Application number
US662456A
Other languages
English (en)
Inventor
Martin Schwemmer
Werner Kunz
Hans Bors
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zellweger Uster AG
Original Assignee
Zellweger Uster AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zellweger Uster AG filed Critical Zellweger Uster AG
Application granted granted Critical
Publication of US3443322A publication Critical patent/US3443322A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C7/00—Heating or cooling textile fabrics
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C2700/00—Finishing or decoration of textile materials, except for bleaching, dyeing, printing, mercerising, washing or fulling
    • D06C2700/09—Various apparatus for drying textiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/06—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path

Definitions

  • a method for controlling and maintaining a predetermined residual moisture content and sheets dried in a drying machine This is accomplished by measuring the value of the residual moisture in the sheet at the discharge end of the drying machine and using this value to control the application of water to the sheet upstream from the drying machine.
  • the water may be provided in two stages, the first of which is constant and which contains additive chemicals, and the second of which is variable and responsive to the measuring device at the discharge end of the drying machine.
  • the device preferably used to apply water involves a rotating roller which is controlled independently of the speed of the sheet moving thereover.
  • the present invention relates to the measurement and control of definite and pre-defined moisture contents at the end of a drying step on continuous sheets such as fabrics, films, paper and the like. It is an additional feature of the novel method of the invention to maintain and control in an accurate manner the temperature of the continuous sheet within wide limits while drying.
  • these diificulties could be circumvented by changing the quantity of the treating bath to be applied to the material in accordance with the desired final temperature or residual moisture content, respectively, i.e. by varying the amount of water to be removed in the heat treatment.
  • the squeezing pressure in the padding machine could be reduced or the amount of water to be applied could be increased by dilution of the treating liquor.
  • several difiiculties will arise: Firstly, it is not possible for mechanical reasons, to alter within wide limits the quantity of liquids to be applied by means of the application equipment employed in the industry, such as padding machines, mangles and the like. Secondly, this mode of operation will yield changes in the concentration of the chemicals to be applied, resulting in an undesired variation in the properties of the final product since a frequent change of the water content according to the required residual moisture or final temperature is necessary.
  • an improved method for any type of drying equipment whereby, at a given constant quantity of chemicals applied, at a given constant heat input, and at a given constant production speed, the residual moisture content and the final temperature, respectively, are variable within wide limits and are controlled in a precise and reproduceable manner.
  • These conditions are elfected by applying onto the continuous sheet, immediately prior to its entering the drying equipment, a quantity of water which is controlled by the required residual moisture content and final temperature, respectively.
  • the water required for the temperature and moisture control, respectively is applied in a separate step in cases where the production method demands the application of aqueous solutions containing chemicals.
  • the total quantity of water finally contained in the material has been applied in two steps.
  • the first step a constant amount of water is applied which depends solely on the type and the necessary concentration of the chemicals as well as of the desired properties of the finished material.
  • the amount of pure water applied in the second step is regulated by the controlling instrument according to the required residual moisture content and final temperature, respectively.
  • the first step will be obsolete in production methods which do not require the application of chemicals but merely drying the material to a given residual moisture content, or which demand a definite final temperature, or in cases where the final temperature must not exceed a certain limit. In such cases, only the amount of water necessary for the control of the residual moisture content and the final temperature, respectively, is applied.
  • the apparatus for the control and regulation of the residual moisture content and the final temperature, respectively will consist of a suitable application machine, a drying zone, instruments for measuring the moisture and the temperature, respectively, and instruments to regulate these controlling conditions.
  • the application machine consists of a rotating roll, mounted on a trough and partly immersed in water therein contained. If desired, a suitable wetting agent may be added to the water.
  • the continuous sheet of material passes over the surface of the rotating roll.
  • the quantity of water applied to the continuous sheet of material is determined by the ratio of the surface speed of the rotating roll and the speed of the continuous sheet passing over the roll.
  • this ratio is fixed by means of the measuring and regulating instruments, keeping constant the speed of the continuous sheet of material. It is possible to employ the application machine both in the application of the liquid containing the chemicals and the regulating water by combining two application rolls. The first roll will apply the treating liquid, and the second roll will apply the changing quantity of the regulating water. It lies further within the scope of the present invention to apply the chemicals by known methods such as padding machines, mangles, and the like.
  • the nature of the surface of the application roll or the segments thereof depends on the type of continuous sheet whereon the water is to be applied.
  • the surface may be smooth or textured. Further, it is possible to employ sectional application rolls with different surface character istics.
  • the water may be applied by means other than those described hereinbefore, e.g., by spraying, coating, steaming, and the like.
  • the quantity of the water applied is regulated in a simple manner by controlling the amount of steam passing through the steamer. Applying the water in zones is effected in this case following the same principle as in the use of liquid water, e.g., by employing perforated steam pipes divided into sections and regulating the steam pressure in these sections individually and according to the quantity of water required in each zone.
  • the drying equipment may be of any known type, such as tenter frames, jet dryers, loop dryers, infra-red dryers, cylinder dryers, and the like.
  • the measuring and regulating instruments are composed of known elements. According to the present invention, either the moisture content or the temperature are measured by known methods. The data are fed into the regulating instruments which in turn control the speed of the application machine. In a preferred form of the invention, the required data are measured at the end of the drying machine; however, it is also possible to effect the measurements at a convenient location inside of the drying zone.
  • the continuous sheet of material, the residual moisture content and final temperature, respectively, of which are regulated according to the scope of the present invention, may consist of a fabric of either a woven or knitted type, a felt, a fleece, a plastic film, a paper, and similar continuous fiat materials.
  • FIGURE 1 is a simplified schematic representation of the apparatus, using one application machine, constructed in accordance with the invention and used for carrying out the new method;
  • FIGURE 2 is a similar simplified schematic representation, using two application machines
  • FIGURE 3 is an enlarged fragmentary view of a rotating application roll divided into segments.
  • FIGURE 1 the continuous sheet of material a is immersed in a vessel containing the application liquor b and is then squeezed off to a constant water content by means of the padding machine c.
  • the sheet of material passes over the application machine consisting of the rotating application roll e which applies varying quantities of water d onto the sheet of material a according to the surface speed of the rotating roll.
  • the material a then passes through the drying zone g at the exit of which the residual moisture content or the temperature is measured by an instrument h.
  • the measuring device h controls a regulating instrument f which in turn varies the speed of the rotating roll e according to the residual moisture content or temperature required.
  • the rotating application roll k is partly immersed in the application liquid 1 which contains the necessary chemicals.
  • This liquid is applied to one side of the continuous sheet of material i.
  • a constant quantity of the application liquid is applied to the sheet of material i.
  • the sheet of material i is reversed in the usual manner by way of rollers, and passes a second rotating roll m.
  • the surface speed of the roll m may be varied.
  • varying quantities of water it are applied to the opposite side of the sheet of material i which then passes a cylinder drying machine p and is dried to a predetermined residual moisture content or at a final temperature.
  • the feeling device q feeds the measured data into the regulating instrument 0 which changes the surface speed of the rotating roll in according to the quantity of water required for the desired residual moisture content or final temperature.
  • the rotating roll is evided into two segments u, t, which are individually driven by the motors v, r.
  • the surface speeds of the two segments are regulated by means of two separate measuring and regulating systems. When the surface speeds of the segments u, t differ, different quantities of water s are applied to the continuous sheet of material.
  • a method for controlling and maintaining within wide limits at predetermined residual moisture content and/or final temperature on continuous sheets of material conveyed through a drying machine comprising providing constant heat input to said drying machine, moving said sheet at constant velocity, determing the value of the residual moisture content and/or temperature of the sheet either immediately at the discharge end of said drying machine or within same, and applying to the sheets prior to their drying a quantity of water in response to said value to obtain said predetermined residual moisture content and/or final temperature in said sheets.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Drying Of Solid Materials (AREA)
US662456A 1966-08-23 1967-08-22 Method for controlling the drying steps on continuous sheet of material Expired - Lifetime US3443322A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1215866A CH459125A (de) 1966-08-23 1966-08-23 Verfahren zur Regelung von Trocknungsvorgängen an Textilbahnen

Publications (1)

Publication Number Publication Date
US3443322A true US3443322A (en) 1969-05-13

Family

ID=4380407

Family Applications (1)

Application Number Title Priority Date Filing Date
US662456A Expired - Lifetime US3443322A (en) 1966-08-23 1967-08-22 Method for controlling the drying steps on continuous sheet of material

Country Status (4)

Country Link
US (1) US3443322A (de)
AT (1) AT280898B (de)
CH (1) CH459125A (de)
GB (1) GB1153926A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994016276A1 (de) * 1993-01-14 1994-07-21 Gerhard Klemm Trockner für bedruckte warenbahnen
CN111336778A (zh) * 2020-03-06 2020-06-26 时兰兰 一种基于离合原理检测纺织品水分的烘干装置
CN115284484A (zh) * 2022-07-08 2022-11-04 沈阳华控科技发展有限公司 一种pvc干燥装置的pvc含水量软测量方法
CN115540554A (zh) * 2022-09-23 2022-12-30 大丰万达纺织有限公司 一种纺织用烘干装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2951007A (en) * 1957-06-06 1960-08-30 Paul R Lippke Method and device for regulating the moisture content of endless moving webs of fibrous material
US3161482A (en) * 1961-02-27 1964-12-15 Midland Ross Corp Fluid distributing apparatus for material treating
US3302296A (en) * 1964-08-14 1967-02-07 Ibm Method and apparatus for drying of moisture-setting inks

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2951007A (en) * 1957-06-06 1960-08-30 Paul R Lippke Method and device for regulating the moisture content of endless moving webs of fibrous material
US3161482A (en) * 1961-02-27 1964-12-15 Midland Ross Corp Fluid distributing apparatus for material treating
US3302296A (en) * 1964-08-14 1967-02-07 Ibm Method and apparatus for drying of moisture-setting inks

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994016276A1 (de) * 1993-01-14 1994-07-21 Gerhard Klemm Trockner für bedruckte warenbahnen
CN111336778A (zh) * 2020-03-06 2020-06-26 时兰兰 一种基于离合原理检测纺织品水分的烘干装置
CN115284484A (zh) * 2022-07-08 2022-11-04 沈阳华控科技发展有限公司 一种pvc干燥装置的pvc含水量软测量方法
CN115540554A (zh) * 2022-09-23 2022-12-30 大丰万达纺织有限公司 一种纺织用烘干装置

Also Published As

Publication number Publication date
CH459125A (de) 1968-09-13
GB1153926A (en) 1969-06-04
CH1215866A4 (de) 1968-03-15
AT280898B (de) 1970-04-27

Similar Documents

Publication Publication Date Title
JPH04272266A (ja) 帯状繊維製品を連続的に加湿する方法及び装置
US3199317A (en) Dyeing and similar liquid treatment of textile fibres
US4378639A (en) Method and apparatus for uniformly drying a continuous web of cellulosic fibers
US2960963A (en) Fabric treating machine
US2826167A (en) Fabric treating apparatus
US3443322A (en) Method for controlling the drying steps on continuous sheet of material
US3253315A (en) Apparatus and methods for the control and automatic regulation of the pressure of squeezing rollers in a continuous process
US2712170A (en) Treatment of textile fabrics
Choudhury Process control in finishing of textiles
US3406437A (en) Process for treating yarn
US4162563A (en) Integrated method of finishing, straightening and compressive preshrinking of fabric
US3242583A (en) Method of drying a running web of sheet material
US3425861A (en) Continuous application of substances to travelling materials
US5052069A (en) Fabric treatment
US3412411A (en) Method for dyeing tubular knit material
US2241554A (en) Apparatus for manufacturing paper
US2870038A (en) Method for imparting durable lusterized finish to fabric
US3187716A (en) Coating machinery
US2174215A (en) Decatizing fabrics
GB2037188A (en) Applying treating liquids to textile webs
ES464730A1 (es) Procedimiento para aplicar uniformemente bano de tratamientosobre bandos de genero textil.
US4376632A (en) Process and plant for the continuous mercerization of raw or colored open or tubular knitted fabric
US3671298A (en) Hydraulic system for controlling resin pickup
US3124481A (en) Apparatus for improving the surface
DE3163097D1 (en) Method of continuously applying a dye bath to a wet textile sheet material