Nothing Special   »   [go: up one dir, main page]

US3303574A - Method of and apparatus for vacuum drying of flat material in foil shape, especiallyleather - Google Patents

Method of and apparatus for vacuum drying of flat material in foil shape, especiallyleather Download PDF

Info

Publication number
US3303574A
US3303574A US445377A US44537765A US3303574A US 3303574 A US3303574 A US 3303574A US 445377 A US445377 A US 445377A US 44537765 A US44537765 A US 44537765A US 3303574 A US3303574 A US 3303574A
Authority
US
United States
Prior art keywords
station
drying
leather
plate
vacuum drying
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
US445377A
Other languages
English (en)
Inventor
Hohmann Rolf
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.)
TROCKENTECHNIK GmbH
Original Assignee
TROCKENTECHNIK GmbH
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 TROCKENTECHNIK GmbH filed Critical TROCKENTECHNIK GmbH
Application granted granted Critical
Publication of US3303574A publication Critical patent/US3303574A/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
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • F26B5/045—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum for drying thin, flat articles in a batch operation, e.g. leather, rugs, gels
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/26—Leather tensioning or stretching frames; Stretching-machines; Setting-out boards; Pasting boards
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/58—Drying
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B2700/00—Mechanical treatment or processing of skins, hides or leather in general; Pelt-shearing machines; Making driving belts; Machines for splitting intestines
    • C14B2700/07—Leather tensioning or stretching frames; Stretching-machines; Setting-out boards; Pasting boards; Fastening devices; Drying of leather

Definitions

  • the present i; *Iention relates to a method of and apparatus for vacuum drying flat material in foil shape, especially leather. It has been known heretofore to vacuum dry leather and similar flat foil-shaped material, by placing the wet leather upon a plate heated by hot water or steam, and smoothing out the thus placed leather by means of a slicker which smoothes out any folds or creases in the leather. Subsequently, -a cover of the apparatus which comprises means for pressing the leather against the heating plate is lowered onto the leather on the heating plate, and finally the leather is subjected to vacuum drying.
  • a method of this type has the drawback that the leather parts which are in contact with the heating plate will during the smoothening operation be subjected to. a rather high temperature which almost equals the temperature of the heating plate. Such strong heating of the leather, howev-er, harmfully affects the quality of the goods.
  • FIG. 1 is a side view of an apparatus according to the present invention.
  • FIG. 2 shows to a top view of the arrangement shown in FIG. 1.
  • FIG. 3 illustrates on a larger scale than FIGS. 1 and 2 a section along the line III1II of FIG. 2.
  • the present invention is characterized primarily in that the fiat material, for instance leather, is placed in wet condition upon a cold drying plate supported by a working table and is smoothened out on said cold plate. Thereupon, the thus smoothened-out leather is introduced into a vacuum container where it is heated and vacuum dried. Simultaneously with the introduction of the smoothed-out leather on the cold drying plat-e into the vacuum chamber, another drying plate is moved from the vacuum chamber into a loading station, i.e. above the working table, where the dried leather is removed and the plate is charged with a new wet leather piece.
  • the loading station is provided with a blower for cooling the heating plate which has just been moved from the drying chamber to the loading and unloading station so that the plate before being loaded with new material will be fairly cool.
  • the apparatus comprises primarily a loading and unloading station generally designated I and a drying station generally designated II.
  • the loading and unloading station I includes a working table 1 supported by a frame structure 2, while the drying station comprises a housing 3 (FIG. 3) encasing vacuum drying means.
  • the arrangement according to the present invention furthermore comprises two drying plates 9 and 9a each of which is adapted alternately to be moved into the drying station and to the [loading station.
  • the drying plates are adapted removably to be inserted into frames 6, 7 respectively connected to the upper and lower sections 5a and 5b of a pair of endless chains 4 and 5 respectively supported by sprockets wheels 4a, 4b and 5c and 5d.
  • the chains 4 and 5 extend alongside the frames 6 and 7 respectively supporting plates 9 and 9a.
  • Each of said frames 6, 7 is provided with rollers 8.
  • the rollers 8 of the upper frame 6 are adapted to roll on rails 8a (see FIG. 3) arranged alongside the path of upper frame 6, while the rollers of lower frame 7 are adapted to roll on rails 8b arranged alongside the path of the lower frame 7.
  • the paths of movement of the two frames 6 and 7 are at different levels so that the frames can, as stated above, alternately be moved from the loading station into the drying station, and vice versa, without interfering with each other.
  • the arrangement is such that when one plate has reached its proper position in the drying station, the other plate has reached its proper loading position.
  • the movement of the chains is preferably etfected by a controllable motor M (FIG. 1).
  • the plates 9, 9a are relatively thin, for instance they may have a thickness of 0.06 inch and a surface-s area of 126 inch times 71 inch.
  • the working table is preferably equipped with raising and lowering means, for instance in the form of compressed air operable cylinder piston systems 10 for raising and lowering the working table.
  • the working table 1 in the form of a grate and to provide a blower B below said grate for supplying cooling air.
  • the drying station has that portion of rails 81:, 8b which is located therein supported by supporting members 13 (FIG. 3) which in their turn are supported by springs 13a.
  • the lower ends of springs 13a rests on stationary supports S.
  • the lower ends of springs 13a are guided in tubular members T.
  • the drying station furthermore includes a cover 11 connected to fluid operable piston means 12 reciprocable in cylinders 12a.
  • These cylinders are in customary manner supplied with fluid inlets and outlets adapted to be connected to the pressure and suction sides of a pressure fluid source and are controllable for selectively lifting and lowering cover 11.
  • the inlets to said cylinders 12a may be interconnected, and correspondingly also the outlets of said cylinders 12a may be interconnected.
  • Cover 11 (FIG. 3) is in a manner known per se equipped with a felt plate 15 adapted to engage the leather on the respective drying plate and to press the drying plate with the leather thereon against a heating plate 14, which latter is supported by a support 16.
  • the apparatus according to the present invention occupies the position shown in FIGS. 1 and 2 in which drying frame 7 with drying plate 9 is in its loading station while frame 6 with drying plate 9a is in its drying station. If it is now intended that a wet leather piece is to be processed, the said leather piece is in wet condition placed upon the relatively cold drying plate 9 after the working table ll has been raised by the cylinder piston systems 10 so as to properly support plate 9. In a manner known per se the leather on plate 9 is smoothed out for instance by means of a slicker. Thereupon, motor M (FIG. 1) is actuated to move plate 9 into the drying station as shown in FIG.
  • exhaust and vacuum means or installation may be of any suitable type, it may be of the type shown in the central and lower portion of FIG. 3.
  • it may comprise a vacuum pump 17 which communicates with a chamber 21 through a conduit 18, a condenser 19 and a conduit 20.
  • chamber 21 is located in cover 11 between a partition 22 and a permeable support 23 for the felt plate 15.
  • the steam originating from the wet leather and withdrawn with the air from chamber 21 is condensed as water in the condenser 19.
  • cooling water is supplied to condenser 19, and this water is again withdrawn through conduit 25.
  • FIG. 3 furthermore shows a heat exchanger 26 one end of which through a conduit 27 communicates with a heating chamber 28 located between support 16 and heating plate 14.
  • the other end of heat exchanger 26 communicatesthrough a conduit 29 with a pump 30 communicating with heating chamber 28 through a conduit 31.
  • hot water is continuously circulated by pump 30 in the direction of the arrow A.
  • the heat which has been transferred by the heating medium to heating plate 14 is made up by the supply of heat in the heat exchanger 26 through which is passed a heating coil 32.
  • the arrangement according to the present invention permits smoothing out of the wet leather on a cold plate, which plate with the smoothed-out leather will subsequently be heated quickly in the drying station with the simultaneous e stablishment of a vacuum.
  • This vacuum brings about a quick intensive evaporation of the water in the leather while the latter is being cooled by the evaporation cold and thus cannot assume any high temperature which might affect the quality of the leather.
  • drying plate in contrast to heretofore known drying plates does not consist of a wire fabric but of a thin sheet metal plate, the smoothing out of the leather and the elimination of any folds therein can be accomplished to a much better extent and quicker than herebefore possible.
  • the heating plate may be heated in any convenient manner, for instance electrically, by steam or the like. If desired, the heating plate may also be omitted entirely and be replaced by other conventional heating means.
  • An apparatus for vacuum drying fiat material, especially leather which includes: a first station comprising means for smoothing out a wet piece of fiat material and readying the same for vacuum drying, a second station comprising means for vacuum drying a piece of wet material readied for drying at said first station, rail means respectively extending at a first level and at a second level from said first station to said second station, and two carriage means respectively movably mounted on said rail means for receiving pieces of material to be processed and movable on said rail means from said first station to said second station and from said second station to said first station, said carriage means being interconnected so that one carriage means will be at said first station when the other carriage means is at said second station and vice versa, that section of said rail means which is at said second station being variable as to height.
  • each of said carriage means has deta-chably mounted thereon a relatively thin and large surface area sheet metal plate for supporting the fiat material to be processed.
  • An apparatus for vacuum drying flat material, especially leather which includes: a first station comprising means for smoothing out a wet piece of flat material and readying the same for vacuum drying, said first station also comprising a working table adjustable as to height and designed as a grate, a second station comprising means for vacuum drying a piece of wet material readied for drying at said first station, rail means respectively extending at a first level and at a second level from said first station to said second station, and two carriage means respectively movably mounted on said rail means for receiving pieces of material to be processed and movable on said rail means from said first station to said second station and from said second station to said first station, said carriage means being interconnected so that one carriage means will be at said first station when the other carriage means is at said second station and vice versa, that section of said rail means which is at said second station being variable as to height.
  • An apparatus which includes blower means for delivering cooling air through said working table, and also includes fluid operable means for selectively raising and lowering said working table.
  • An apparatus for vacuum drying flat material especially leather which includes: a first station comprising means for smoothing out a wet piece of flat material and readying the same for vacuum drying, a second station comprising means for vacuum drying a piece of wet material readied for vacuum drying at said first station, said last mentioned means including a heating table and pressing means operable selectively to be moved toward and away from said heating table, rail means respectively extending at a first level and a second level from said first station to said second station, two carriage means respectively movably mounted on said rail means for receiving pieces table for vacuum drying the piece of material on said last mentioned carriage means.
  • vacuum producing means which includes the steps of: outside said container and on a rigid support smoothing out a single piece only at a time of a first piece of fiat material while at the same time subjecting a second single piece of flat material previously smoothed out outside said container on a rigid support to fluid pressure and vacuum drying while resting said last mentioned piece on the same rigid support on which it was previously smoothed out, and subsequently after completed drying of said second piece of flat material withdrawing the same at a first level from said container on its respective support and removing the dried piece from said last mentioned support and cooling the latter while at the same time moving said first piece of fiat material at a second level different from said first level into said container on the support on which it was previously smoothed out and subjecting said first piece of flat material to fluid pressure and vacuum drying and at the same time placing another wet piece of flat material on the support that is now outside said container.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
US445377A 1964-04-07 1965-04-05 Method of and apparatus for vacuum drying of flat material in foil shape, especiallyleather Expired - Lifetime US3303574A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET25970A DE1263979B (de) 1964-04-07 1964-04-07 Verfahren zum Trocknen von flaechigem Gut, insbesondere Leder

Publications (1)

Publication Number Publication Date
US3303574A true US3303574A (en) 1967-02-14

Family

ID=7552441

Family Applications (1)

Application Number Title Priority Date Filing Date
US445377A Expired - Lifetime US3303574A (en) 1964-04-07 1965-04-05 Method of and apparatus for vacuum drying of flat material in foil shape, especiallyleather

Country Status (5)

Country Link
US (1) US3303574A (de)
DE (1) DE1263979B (de)
ES (1) ES311101A1 (de)
GB (1) GB1077093A (de)
NL (1) NL6503495A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3362077A (en) * 1965-09-23 1968-01-09 Augere Paul Drying tanned leathers
US3378935A (en) * 1965-09-23 1968-04-23 Charvo Sa Apparatus for drying hides, skins and similar sheetlike articles
WO1998001583A1 (en) * 1996-07-08 1998-01-15 Emilio Buttazzi Thermal compression plant with heat recovery for vacuum dryers and dryer incorporating said plant
EP0838530A2 (de) * 1996-10-23 1998-04-29 Incoma Srl Vorrichtung für das schnelle Ein- und Aussetzen von Stützrahmen für Gittermatten in Vakuumtrocknern
US20100071225A1 (en) * 2008-09-19 2010-03-25 Shannon Ross Portable cooler drying frame

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI800861A (fi) * 1980-03-20 1981-09-21 Viljanmaa Antti Foerfarande och anordning foer utbytning av skinnutspaenningsarmar i en skinnutspaenningsmaskin
IT1391988B1 (it) * 2008-11-20 2012-02-02 Erretre Spa Impianto migliorato per l'essicazione di superfici laminari flessibili.
CN108955120A (zh) * 2018-07-28 2018-12-07 赣州市兴顺辉科技有限公司 一种便于取料的石墨烯生产用烘干装置
CN110846445B (zh) * 2019-11-26 2021-12-07 南通新金丰皮革机械有限公司 一种皮革用新型真空系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1009881A (en) * 1911-03-27 1911-11-28 William H Allen Process of drying hides.
US2661543A (en) * 1950-06-24 1953-12-08 United Shoe Machinery Corp Apparatus for and methods of drying leather

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB950138A (en) * 1961-02-18 1964-02-19 Luigi Turato Process and apparatus for stretching and vacuum drying of wet dressed and/or coloured hides

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1009881A (en) * 1911-03-27 1911-11-28 William H Allen Process of drying hides.
US2661543A (en) * 1950-06-24 1953-12-08 United Shoe Machinery Corp Apparatus for and methods of drying leather

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3362077A (en) * 1965-09-23 1968-01-09 Augere Paul Drying tanned leathers
US3378935A (en) * 1965-09-23 1968-04-23 Charvo Sa Apparatus for drying hides, skins and similar sheetlike articles
WO1998001583A1 (en) * 1996-07-08 1998-01-15 Emilio Buttazzi Thermal compression plant with heat recovery for vacuum dryers and dryer incorporating said plant
US6112426A (en) * 1996-07-08 2000-09-05 Buttazzi; Emilio Thermal compression plant with heat recovery for vacuum dryers and dryer incorporating said plant
EP0838530A2 (de) * 1996-10-23 1998-04-29 Incoma Srl Vorrichtung für das schnelle Ein- und Aussetzen von Stützrahmen für Gittermatten in Vakuumtrocknern
EP0838530A3 (de) * 1996-10-23 1998-09-02 Incoma Srl Vorrichtung für das schnelle Ein- und Aussetzen von Stützrahmen für Gittermatten in Vakuumtrocknern
US20100071225A1 (en) * 2008-09-19 2010-03-25 Shannon Ross Portable cooler drying frame

Also Published As

Publication number Publication date
NL6503495A (de) 1965-10-08
GB1077093A (en) 1967-07-26
DE1263979B (de) 1968-03-21
ES311101A1 (es) 1965-07-01

Similar Documents

Publication Publication Date Title
US3303574A (en) Method of and apparatus for vacuum drying of flat material in foil shape, especiallyleather
CN111893683A (zh) 一种无纺布染色后烘干定型一体机
US1960697A (en) Improved matrix former and drier
US3235931A (en) Apparatus for the heat setting of cloth layers
CN106319808A (zh) 一种布料熨烫加工出布流水线
US3302303A (en) Drying system
US3151952A (en) Process and apparatus for spreading out and vacuum drying of wet dressed and/or colored hides
US2674811A (en) Drier for porous materials
US3406472A (en) Electrically heated pressing machine
CN207276986U (zh) 一种纺织布料生产用压光装置
CN217479770U (zh) 一种羊绒混纺织物整烫装置
CN108677447A (zh) 带烘干功能的织布熨烫机
US3378935A (en) Apparatus for drying hides, skins and similar sheetlike articles
CN216891574U (zh) 一种棉锦织物加工用印染装置
CN220813097U (zh) 一种用于女士短裤的烘干装置
CN117468196B (zh) 一种织带固色机及织带固色生产线
CN216998983U (zh) 一种校服生产用具有夹持机构的熨烫设备
CN215550891U (zh) 一种口罩生产用压平装置
US1754460A (en) Combined matrix former and drier
JPS6375174A (ja) 織物、編物などを連続的に処理する方法
CN221666500U (zh) 一种保暖型坯布生产用烘干设备
CN221626286U (zh) 一种皮革干燥机
CN205373274U (zh) 一种热风隧道干燥装置
CN215809965U (zh) 一种无纺布面料加工用烘干装置
US3597866A (en) Pressing machines