US3609891A - Method and apparatus for pressing of textile fabric continuously - Google Patents

Method and apparatus for pressing of textile fabric continuously Download PDF

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Publication number
US3609891A
US3609891A US886513A US3609891DA US3609891A US 3609891 A US3609891 A US 3609891A US 886513 A US886513 A US 886513A US 3609891D A US3609891D A US 3609891DA US 3609891 A US3609891 A US 3609891A
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United States
Prior art keywords
pressing
fabric
temperature
heating
length
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Expired - Lifetime
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US886513A
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English (en)
Inventor
Kazutomo Ishizawa
Akira Fukuoka
Akiyoshi Kawabata
Yasunori Nagata
Yoshiaki Uematsu
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Kanegafuchi Spinning Co Ltd
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Kanegafuchi Spinning Co Ltd
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    • 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
    • D06C15/00—Calendering, pressing, ironing, glossing or glazing textile fabrics
    • D06C15/10—Calendering, pressing, ironing, glossing or glazing textile fabrics between flat plates of a press
    • 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
    • D06C2700/17—Flat presses, pressing plates or heating devices for pressing plates

Definitions

  • each length of fabric is then similarly reheated during the next pressing cycle and the cumulative heating and pressing of the end portions substantially equals that applied to the intermediate portion so that no belt marks are created.
  • Several dilferent means for heating the pressing plates of the invention are illustrated.
  • the present invention relates to an improved method and apparatus for the continuous flat pressing of textile fabric, and more particularly relates to a method and apparatus for preventing the formation of so-called pressing belt marks.
  • the paper pressing operation performed on high quality worsted fabric is inevitable for attaining very elegant luster and good hand feeling.
  • a long period of time is required to complete the above-mentioned paper pressing operation, and moreover, the folds of the fabric are free from the paper pressing operation. Therefore, in the paper pressing operation, it is required to transfer the fabric which has completed a first operation at the other lift table and at the same time it is necessary to change the insertion of the press-papers.
  • a plurality of presses and lifts are required for use.
  • the principal object of the present invention is to Patented Oct. 5, 1971 ice provide an improved method and apparatus for carrying out the continuous flat pressing of fabrics without any occurrences of a pressing belt mark.
  • FIG. 1 is a side view of a main portion of the conventional continuous flat press, partly in section, according to the present invention
  • FIG. 2 is an explanatory diagram illustrating the functional operation of the continuous flat press shown in FIG. 1,
  • FIGS. 3A and 3B are a pair of explanatory diagrams illustrating the variation of the working temperature of the flat press shown in FIG. 2,
  • FIGS. 4A and 4B are diagrams showing the relationship between the thickness of the processed fabric and the operating temperature obtained by actual mill tests utilizing the conventional flat press,
  • FIG. 5A is a cross section of a heating press plate useable for practicing the present invention, taken along line 5A5A in FIG. 5B.
  • FIG. 5B is a press plate
  • FIG. 6 is an explanatory drawing illustrating the relationship between the pressing temperature and the positions of the heating press plate and the relationship between the positions of the heating plate and assumed thickness of the fabric pressed by the above-mentioned portion of the heating plate according to the present invention
  • FIGS. 7A, 7B and 7C are drawings illustrating the structure of the heating press plate and the working effect thereof.
  • FIGS. 8A, 8B, 8C and 8D are cross-sectional views of modified heating plates, according to the present invention.
  • the conventional fiat press has been designed consisting of a fixed top pressing plate In, intermediate superposed pressing plates 2a and 2b, and a moveable pressing plate 1b, all of which are heated.
  • a ram (not shown) is disposed below the moveable pressing plate 1]) and is selectively actuated to displace the pressing plate 1b in an upward direction. Therefore, two units for carrying out the pressing operation are formed, one by the top pressing plate 1a coating with the intermediate pressing plate 2a, and the other by the pressing plate 1b coacting with the intermediate pressing plate 2b. Since the functions of these two units are iidentical, the pressing operation of the flat press is hereinafter illustrated only for the first unit.
  • a fabric 3a is passed between the top pressing plate 1a and the intermediate pressing plate 2a in such a way that the fabric 3a passed to and fro about five times by guide rollers so that five thicknesses may be simultaneously pressed at one time.
  • the pressing plates (1a, 1b, 2a and 2b are provided with a plurality of heating conduits 6 passing therein. whereby the pressing plates 1a, 1b, 2a and 2b are heated by a heating medium passing through the heating conduit 6.
  • the rollers and fabric are at rest, pressure is applied by the moveable ram and after a giventime, the pressure is released and the pressing plate 2a falls apart in accordance with the downward motion of the moveable plate together with the ram. Then the rollers are driven so that the fabric is advanced forward by a predetermined distance afterwhich the rotation of the rollers is stopped and the pressing operation is carried out by the above mentioned action.
  • the operation cycle may be repeated,
  • the fabric 3a which is fed into the space existing between the heated pressing plate 1a and the intermediate pressing plate 2a, is subjected to a first pressing operation
  • the working length of the heated pressing plate 1a is represented to be I and the length of the pressed portion of the fabric 3a taken along the length thereof is also represented by l.
  • the abovementioned length of the pressed portion of the fabric 3a is hereinafter referred to as the press-length of the fabric.
  • the fabric 3a is moved forward by a distance m. In this moving motion of the fabric, it is required that the following relation lgm be satisfied.
  • a point P on the fabric 3a which is positioned at the rear ends of the pressing plates 1a and 2a, is displaced to be represented by a point Q after the above-mentioned forward displacement of m distance, as shown in FIG. 2.
  • Supposing a point of the fabric 3a facing the forward end of the pressing plates 1a and 2a is R, represented by Q R is subjected to the duplicate pressing operation so that a wellknown belt mark is generated into the fabric 3a.
  • the pressure and humidity contained in the fabric, the temperature and the duration time for carrying out the pressing operation are main factors for considering the cause of generating luster on the fabric.
  • the temperature for carrying out the pressing operation is particularly important to attain the uniform result of the pressing operation.
  • the fabric 31 is subjected to the operation at least five times.
  • the operating temperature imparted to the fabric 3a is the highest at the contacting position with the pressing plates 1a, 1b, 2a and 2b, and the farther away the fabric 30 is from the pressing plates 1a and 2a or 1b and 2b, the lower is the operating temperature imparted to the fabric 3a between press-papers.
  • the operating temperature imparted to the fabric 3a at the A and E positions is the highest and that imparted to the fabric 3a at the D and B positions is medium and that imparted to the fabric 3a at the C position is the lowest.
  • FIGS. 4A and 4B two examples illustrating the relation between the pressing temperature and the thickness of the pressed fabric are shown.
  • the diagram of FIG. 4A represents the test results of a pure wool fabric Matweave (thickness of the fabric is 0.620 mm.), while diagram of FIG. 4B represents the test results of blended mohair-tropical (wool 50%, polyester fiber 50%, thickness of the fabric is 0.370 mm.).
  • the thickness of the fabric is measured after completion of the pressing operation carried out under a pressure of 20 kg./mm. at several temperatures from 20 to 110 C. for sec.
  • the operating temperature imparted to the duplicate-pressing portion (TR of the fabric 3A (in FIG. 2) should be set at lower than the normal operating temperature so that the pressing effect imparted to the portion Q R of the fabric 3a by the duplicate pressing operations is almost the same as that imparted to the other portions of the fabric 3a by a single pressing operation whereby the distinct pressing belt mark can be eliminated.
  • FIGS. 5A and SE a typical press plate of the continuous flat press according to the present invention is shown.
  • the elongated pressing plate 5 is provided with a sinuous conduit or a plurality of conduits 6 passing therethrough for flowing therein a heating medium, such as steam or hot water etc., so that the pressing plate 5 is uniformly heated.
  • a heating medium such as steam or hot water etc.
  • the leading end or feed side end portion and the trailing end or delivery side end portion of the pressing plate 5 are provided with cooling conduits 7a and 7b for cooling the respective portions of the pressing plate 5. Cool water flows into the conduits 7a and 7 b.
  • the outer side of the cooling conduits 7a and 7b are provided with recesses 8a and 8b for cooling the above-mentioned end portions as shown in the drawing.
  • the variation of the temperature of the pressing plate 5 is shown by a curve I, wherein F, G, H, I, I and K on the abscissa represent the measured positions on the pressing plate 5 as shown in FIG. 5A, and the ordinate represents the measured temperature of the pressing plate 5 as measured during an actual pressing operation.
  • the temperature of the major center portion of the pressing plate 5 is C.
  • the temperature of the cooling water is 242 C.
  • the flow rate of the cooling water in the conduits 7a and 7b is 30 l./ min and room temperature is 28 C.
  • the temperature of the pressing plate 5 is lowered from point F to point K and a decreasing temperature gradient is established in the pressing plate surface progressively decreas* ing from the major center portion to each end thereof as represented by curve I. Therefore, by applying the test results shown in FIGS. 4A and 4B, the variation of the relative thickness of the fabric pressed by the abovementioned portions F, G, H, I, J and K can be estimated as shown by a curve II, in FIG. 6. In this curve II, the ordinate represents the decrease fabrics thickness.
  • the variation in the thickness of the pressed fabric is represented by a solid line curve I in FIG. 7B.
  • the solid curve I is composed of a pair of curved portions Pa-Pb and Rb-Ra symmetrically positioned at both end thereof and representing the thickness of the trailing and leading ends, respectively, of the fabric web and an intermediate horizontal portion Pb-Rb representing the thickness of the major center portion of the fabric web.
  • the thickness of the fabric 3a gradually decreases to the thickness represented by the horizontal portion Pb-Rb and in the curved portion Rb- Ra, the thickness of the fabric 3a gradually increased from the level of the horizontal portion Pb-Rb to the same level as the point Pa.
  • the above-mentioned variation of the fabrics thickness depends upon the pressing temperature of the surface of the pressing plate 5. Consequently, the length of fabric corresponding to the curved portion PaPb, coincides with that of the portion of the fabric corresponding to the curved portion Rb-Ra. Therefore, the length of the fabric portions corresponding to Pa-Pb, Pb-Rb, Rb-Ra are hereinafter respectively represented by a, m and whereby the pressing length I can be represented by the expression:
  • the fabric 3a is then subjected to another pressing operation.
  • a dot-line curve II in FIG. 7B represents the variation in the thickness of the fabric 3a resting on the press plate. After completion of the succeeding pressing operation, the variation of the thickness of the fabric is represented by .the curve shown in FIG. 7C. As can be clearly understood, the variation in the thickness of fabric in a range Q R is leveled by the succeeding pressin goperation.
  • FIGS. 8A, 8B, 8C and 8D modified embodiments of the pressing plate according to the invention are shown, that is the pressing plate 5 is provided with a pair of cooling conduits 7 or With at least one radiator 8 (FIG.
  • a continuous flat press comprising a plurality of heating flat pressing plates, each of said flat pressing plates consisting of a pair of side heating portions and an intermediate main heating portion arranged between said side heating portions, each of said side heating portions being provided with means for creating a heating surface having a temperature gradient sloping down to an end of said side heating portion, and wherein said intermediate main heating portion is provided with means for creating a uniform temperature heating surface.
  • said means for creating said uniform temperature heating surface upon said intermediate main' heating portion of each of said flat pressing plates comprises conduit means for flowing a heating medium.
  • said means for creating said heating surface having said temperature gradient comprises at least one cooling conduit disposed in each of said side heating portions of each of said flat pressing plates.
  • said means for creating said heating surface having said temperature gradient comprises at least one cooling conduit disposed in each of said side heating portions and means defining a recess formed at an outer edge portion of each of said side heating portions of each of said flat pressing plates.
  • said means for creating said heating surface having said temperature gradient comprises means defining at least one hollow space for radiation formed in each of said side heating portions of each of said fiat pressing plates.
  • said means for creating said heating surface having said temperature gradient comprises means defining at least one deep lateral groove formed at an opposite side of said heating surface of each of said side heating portions of each of said fiat pressing plates.
  • said means for creating said heating surface having said temperature gradient comprises means defining at least one deep lateral groove formed at an opposite side of said heating surface of each of said side heating portions of each of said flat pressing plates, and an adiabatic substance disposed within said groove.
  • a method of fiat pressing a fabric web to a uniform thickness comprising: providing a fabric web to be uniformly flat pressed to a preselected thickness; advancing a predetermined length of said fabric web having leading and trailing ends into a pressing zone; applying pressure to both sides of said predetermined length of fabric web while differentially heating said predetermined length of fabric web in said pressing zone to effect fiat pressing of same to a preselected thickness along subtsantially the entire length thereof and formation of progressively thicker end portions thicker than said preselected thickness at said leading and trailing ends thereof; then advancing the fabric web until the next successive length thereof equal to said predetermined length and including as a leading end thereof said trailing end of the preceding predetermined length of fabric lies within said pressing zone; then repeating said applying and heating step to effect flat pressing of said next successive length of fabric web to said preselected thickness along substantially the entire length thereof including said leading end and formation of a progressively thicker portion thicker than said preselected thickness at the trailing end thereof; and repeating both said last-menti
  • each said applying and pressing step comprises fiat pressing said predetermined length of fabric Web between two heated surfaces each of which is heated to a lesser temperature at its end portions than at its remaining center portion.
  • said means for establishing said decreasing temperature gradient comprises cooling means disposed within said elongated pressing plates for cooling each longtiudinal end portion of each said elongated fiat pressing surface relative to said constant temperature level.
  • An apparatus according to claim 11; wherein said means for wtablishing said decreasing temperature gradient comprises means defining a hollowed out portion in each longitudinal end portion of each said elongated flat pressing surface of sufiicient dimension to establish therein said decreasing temperature gradient.
  • said means for establishing said decreasing temperature gradient comprises means defining at least one groove within each said longitudinal end portion of said elongated flat pressing surface effective to establish therein said decreasing temperature gradient.
  • An apparatus according to claim 14 further including an adiabatic material disposed within each said groove.
US886513A 1968-12-29 1969-12-19 Method and apparatus for pressing of textile fabric continuously Expired - Lifetime US3609891A (en)

Applications Claiming Priority (1)

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JP43096481A JPS4949232B1 (de) 1968-12-29 1968-12-29

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US886513A Expired - Lifetime US3609891A (en) 1968-12-29 1969-12-19 Method and apparatus for pressing of textile fabric continuously
US886525A Expired - Lifetime US3646992A (en) 1968-12-29 1969-12-19 Method for heating pressing plates of continuous flat press

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US (2) US3609891A (de)
JP (1) JPS4949232B1 (de)
CH (1) CH497593A (de)
DE (1) DE1964172A1 (de)
FR (1) FR2027290A1 (de)
GB (1) GB1256159A (de)
NL (1) NL141255B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3758968A (en) * 1968-12-29 1973-09-18 Y Uematsu Apparatus for controlling the operating temperature of a continuous flat press
US3991449A (en) * 1971-06-09 1976-11-16 Kanegafuchi Boseki Kabushiki Kaisha Process for finishing textured knitted fabrics
FR2559168A1 (fr) * 1984-02-08 1985-08-09 Erhardt & Leimer Gmbh Dispositif d'etalement et de repassage
US20090288277A1 (en) * 2007-07-31 2009-11-26 Maria Francesca Marchesi Apparatus and method for compacting webs

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023481A (en) * 1975-09-17 1977-05-17 Molins Machine Company, Inc. Double facer platen
US4151874A (en) * 1977-05-23 1979-05-01 Sumitomo Metal Industries Limited Heat exchanger for flue gas
AU635457B2 (en) * 1991-04-15 1993-03-18 Tlv Co., Ltd. Reduced pressure heat treating device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1847573A (en) * 1930-03-12 1932-03-01 Commercial Iron Works Platen for presses with heating coils
DE1296333B (de) * 1965-06-15 1969-05-29 Thermovox Gmbh Verfahren und Vorrichtung zum Beheizen und/oder Kuehlen von doppelwandigen Formen, insbesondere Rotationsformen, zum Herstellen von Kunststoffkoerpern

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3758968A (en) * 1968-12-29 1973-09-18 Y Uematsu Apparatus for controlling the operating temperature of a continuous flat press
US3991449A (en) * 1971-06-09 1976-11-16 Kanegafuchi Boseki Kabushiki Kaisha Process for finishing textured knitted fabrics
FR2559168A1 (fr) * 1984-02-08 1985-08-09 Erhardt & Leimer Gmbh Dispositif d'etalement et de repassage
US20090288277A1 (en) * 2007-07-31 2009-11-26 Maria Francesca Marchesi Apparatus and method for compacting webs
US7770269B2 (en) * 2007-07-31 2010-08-10 Maria Francesca Marchesi Apparatus and method for compacting webs
US7770270B2 (en) 2007-07-31 2010-08-10 Maria Francesca Marchesi Apparatus and method for compacting webs

Also Published As

Publication number Publication date
NL6919480A (de) 1970-07-01
JPS4949232B1 (de) 1974-12-26
US3646992A (en) 1972-03-07
GB1256159A (en) 1971-12-08
FR2027290A1 (de) 1970-09-25
NL141255B (nl) 1974-02-15
DE1964172A1 (de) 1970-07-09
CH497593A (de) 1970-10-15

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