EP0442989A1 - Dispositif pour le traitement des peaux dans les procedes par voie humide - Google Patents

Dispositif pour le traitement des peaux dans les procedes par voie humide

Info

Publication number
EP0442989A1
EP0442989A1 EP90912669A EP90912669A EP0442989A1 EP 0442989 A1 EP0442989 A1 EP 0442989A1 EP 90912669 A EP90912669 A EP 90912669A EP 90912669 A EP90912669 A EP 90912669A EP 0442989 A1 EP0442989 A1 EP 0442989A1
Authority
EP
European Patent Office
Prior art keywords
skin
nozzles
driven
treatment
rows
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.)
Withdrawn
Application number
EP90912669A
Other languages
German (de)
English (en)
Inventor
Arne Petersen
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.)
Johs Krause GmbH
Original Assignee
Johs Krause 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 Johs Krause GmbH filed Critical Johs Krause GmbH
Publication of EP0442989A1 publication Critical patent/EP0442989A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C15/00—Apparatus for chemical treatment or washing of hides, skins, or leather

Definitions

  • the invention relates to a device for treating hides with liquids in the so-called wet processes, for. B. liming, pickling, tanning, dyeing or the like, consisting of a skin-absorbing lower conveyor belt, an upper skin-covering conveyor belt, both of which are liquid-permeable, a rigid work table, over which the conveyor belts with the one between them Skin are guided and a treatment device arranged above with at least two rows of nozzles with offset nozzles, which extend at least over the working width and by means of which the treatment liquids are penetrated into the skin under pressure.
  • a device for treating hides with liquids in the so-called wet processes for. B. liming, pickling, tanning, dyeing or the like, consisting of a skin-absorbing lower conveyor belt, an upper skin-covering conveyor belt, both of which are liquid-permeable, a rigid work table, over which the conveyor belts with the one between them Skin are guided and a treatment device arranged above with at least two rows of nozzles with offset
  • the wet processes are those treatment stages in which the skin is treated with dissolved chemicals with a high fluid requirement. These include softening the skin, liming in a strongly alkaline solution, descaling (neutralizing) in acidic solution, pickling, e.g. B. using proteolytic enzymes, pimples using acids and salts, tanning, z. B. by means of chro-III salts, retanning and greasing the skin and dyeing.
  • pickling e.g. B. using proteolytic enzymes, pimples using acids and salts, tanning, z. B. by means of chro-III salts, retanning and greasing the skin and dyeing.
  • the majority of these wet processes take place in conventional tanneries in barrel-like containers with frequent circulation and with different exposure times. Large quantities of liquid are required and continuously circulated.
  • Dyeing processes have already been improved somewhat (DE-PS 822 060) in that the skins lie on a belt and are guided past a paint spraying device, which at least reduces the difficulties in manipulating the skin.
  • the need for coloring liquid is considerable, since it is sprayed onto the skin at a distance, with a large amount of Coloring liquid does not come into contact with the skin and a considerable exposure time must also be provided in order to allow the coloring liquid to penetrate into the skin. Coloring through is not possible in this way or only with great expenditure of time.
  • the treatment liquid In the other aforementioned wet processes, the treatment liquid must penetrate the skin intensively and completely, which is why it must be in constant contact with the treatment liquid over a long period of time. In order to enable targeted working with the lowest possible fluid requirement even in these wet processes, it has been proposed (EP-OS 0 009 081) to introduce the treatment fluid into the skin under high pressure in a kind of inoculation process.
  • the object of the invention is to enable faster treatment of the skins without impairing the penetration of the treatment liquids into the skin.
  • the device according to the invention has at least two rows of nozzles arranged at a very short distance above the skin or the upper conveyor belt, which makes it possible to drive the conveyor belts continuously, that is to say to move the skin continuously under the rows of nozzles.
  • a relatively low transport speed is maintained.
  • the small distance naturally results in a pressure loss when spraying on the treatment liquids compared to the direct nozzle cross section.
  • the distance ⁇ . 3 mm preferably in the range of 1 mm.
  • the rows of nozzles are moved in an oscillating manner transversely to the transport direction. Because of this oscillation Due to the jet pressure, the flesh side of the skin is constantly loosened and the fibers are kept in motion due to the movement and the very small distance of the nozzle rows from the skin, so that the treatment liquids can penetrate freely over the entire surface and into the depth.
  • a preferred embodiment is characterized in that the work table is designed as a lifting table for adjusting the distance between the rows of nozzles and the skin.
  • the work table can be raised and lowered. In this way, the distance between the rows of nozzles and the skin can be adjusted very precisely by means of the lifting table to match the skin thickness.
  • the treatment device advantageously consists of a container to which the treatment liquids are fed under pressure and the rows of nozzles connected to the container.
  • the excess treatment liquid which, as already known, is collected in a trough, is recirculated, first passing through filters in order to retain solids from the treatment liquid and to avoid clogging of the nozzles.
  • the rows of nozzles are advantageously formed on at least two, preferably on a plurality of nozzle pipes which extend approximately in the transport direction and are arranged approximately over the working width.
  • the treatment liquid is applied simultaneously over the entire working width and over a certain transport length. It is preferably provided that the nozzle tubes at a small angle, for. B. 10 degrees, are arranged opposite the transport direction.
  • An advantageous embodiment is characterized in that the container with the nozzle tubes is fastened to a crossbar which is arranged above the work table and which is in turn suspended transversely, the crossbar being driven to oscillate.
  • oscillation movement it is advantageous if it can be carried out with a variable frequency and / or amplitude in order to enable adaptation to different skin qualities.
  • the lifting table can on opposite sides by means of synchronously driven actuators, for. B. threaded spindles, and these can over a looping endless drive, z. B. a chain drive. This guarantees a synchronous drive of the threaded spindles and thus a uniform lifting of the entire lifting table, parallel to the nozzle tubes.
  • the actuators can be driven by hand. However, it can instead be provided that the lifting table is driven continuously and can be controlled by means of a device which scans the thickness of the skin.
  • This embodiment has the advantage that there is always the optimal distance between the rows of nozzles and the skin. This is particularly advantageous for changing skin qualities.
  • the rows of nozzles are expediently arranged parallel to one another at a small distance, for example in the direction of transport, in order to ensure the uniform treatment of a skin strip over the entire working width.
  • the nozzle tubes are bent in a U-shape and are connected to the container by means of their legs, while the U-web, which extends approximately in the transport direction, has the nozzles.
  • This embodiment is characterized by its particularly simple and therefore inexpensive construction.
  • the crossmember by means of a controllable drive, for. B. a RegeIgearmotor and an eccentric is driven to oscillate in order to vary the frequency of the oscillation movement.
  • FIG. 1 is a schematic side view of the device
  • FIG. 2 shows a schematic view of the treatment device with work table
  • Figure 3 is a view of the underside of the treatment device with the nozzle tubes
  • Figure 4 is a view of the device in
  • FIG. 5 shows a top view of the device in the illustration according to FIG. 4.
  • a treatment device 2 is shown above a work table 1, to which the treatment liquids are supplied under pressure.
  • a lower conveyor belt 3 and an upper conveyor belt 4 run through, each of which is permeable to liquids, e.g. B. are in the form of a fabric or mesh tape, and between them take up the skins, which are placed at 5.
  • the lower conveyor belt 3 rotates in the direction of the arrow 6 and is driven continuously, if appropriate like the upper conveyor belt 4.
  • a squeezing mechanism 7 is arranged near the discharge end of the lower conveyor belt 3, between the rollers of which the conveyor belt 3 with the skin lying thereon is passed in order to press off the excess treatment liquid located in the skin.
  • a brush roller 8 is arranged, which cleans the upper conveyor belt 4 from dirt in order to Always ensure passage of the treatment liquid from the treatment device 2.
  • a collecting trough 9 Arranged underneath the conveyor belt 3 is a collecting trough 9 which collects the excess treatment liquid.
  • the treatment liquid is sucked out of the tub 9 by means of a pump 11 via a sump filter 10 and optionally fed to the treatment device 2 via filters 12 connected in parallel.
  • a cooler 13 is also arranged in the collecting trough, which in turn is assigned a cooling circuit, designated overall by 14.
  • storage containers 15 can be seen in FIG. 1, which contain different treatment liquids (liquors).
  • the respective desired liquor can be supplied from these storage containers 15 to the collecting trough 9 via the pump 16 and from there to the treatment device 2 via the pump 11.
  • the drip pan 18 is supplied. Finally, the drip pan also has a water connection 19 for dilution purposes.
  • the work table 1 and the treatment device 2 can be seen in more detail in FIG.
  • the skin 20 arranged between the conveyor belts 3 and 4 can also be seen. It is guided by means of the conveyor belts 3, 4 past at least two rows of nozzles 21 of the treatment device 2, it resting on the work table 1 via the lower conveyor belt 3.
  • the distance between the rows of nozzles 21 and the skin is very small and is preferably less than 2 mm. This distance can be formed by forming the work table 1 Adjust the lifting table, which can be raised and lowered in the direction of the double arrow 22.
  • the row of nozzles 21 is realized on a nozzle tube 23 which has a plurality of downwardly directed nozzles 24 and is bent in a U-shape in the exemplary embodiment shown.
  • the nozzle tube 23 is connected via the U-legs 25 to a container 26 containing the treatment liquid, to which the treatment liquid is supplied under pressure in the manner described with reference to FIG.
  • FIG. 3 shows a view of the underside of the container 26.
  • a plurality of nozzle tubes 23 are connected to the container 26, only four of which are shown in FIG. 3 in the outer region of the working width.
  • the Düsen ⁇ tubes 23 are arranged side by side with a small distance.
  • the nozzle tubes 23 run at a small angle to the transport direction 6.
  • the container 26 with the nozzle tubes 23 is connected via a coupling 27 to a supply line 28, which is preferably designed as an elastic hose.
  • the container 26 is also attached to a cross member 29, which in turn is suspended from rods 30 in the bearings 31 and 32.
  • the crossmember 29 also has on one side a bearing eye 33 on which a push or crank rod 34 engages, which is driven by a gear motor 35 via an eccentric 36, with the result that the crossmember and therewith the container 26 with the rows of nozzles 23 carries out an oscillating movement transversely to the transport direction 6.
  • the frequency of the oscillation movement can be adjusted by means of the control gear motor 35.
  • the nozzle tubes 23 describe how in particular can be deduced from FIG. 3, a back and forth movement above the skin with the result that the skin is coated over the entire working width and over a certain distance in the direction of transport 6.
  • the nozzles 24 in the nozzle tubes 23 are offset from one another.
  • the work table 1 designed as a lifting table is guided via lateral supports 37 on threaded spindles 38, which are driven together by a chain 39 via chain wheels 40.
  • the drive takes place by means of a hand wheel 41, which acts on one of the chain wheels 40.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Coloring (AREA)

Abstract

Un dispositif pour le traitement des peaux par des liquides dans les procédés dits par voie humide se compose d'une bande transporteuse inférieure recevant la peau, d'une bande transporteuse supérieure recouvrant la peau, toutes deux perméables aux liquides, d'une table de travail rigide sur laquelle sont guidées les bandes transporteuses avec la peau placée entre elles et d'une installaion de traitement disposée au-dessus et comportant au moins deux séries de buses avec des buses décalées, qui recouvrent au moins la largeur de travail et qui servent à faire pénétrer sous pression les liquides de traitement dans la peau. Pour accroître la vitesse de travail, il est prévu que les bandes transporteuses soient entraînées en continu et que les séries de buses soient disposées avec un très faible écartement au-dessus de la peau ou de la bande convoyeuse supérieure et soient entraînées selon un mouvement oscillant perpendiculairement à la direction du transport.
EP90912669A 1989-09-14 1990-08-30 Dispositif pour le traitement des peaux dans les procedes par voie humide Withdrawn EP0442989A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3930767A DE3930767A1 (de) 1989-09-14 1989-09-14 Vorrichtung zum behandeln von haeuten in nassprozessen
DE3930767 1989-09-14

Publications (1)

Publication Number Publication Date
EP0442989A1 true EP0442989A1 (fr) 1991-08-28

Family

ID=6389458

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90912669A Withdrawn EP0442989A1 (fr) 1989-09-14 1990-08-30 Dispositif pour le traitement des peaux dans les procedes par voie humide

Country Status (8)

Country Link
EP (1) EP0442989A1 (fr)
JP (1) JPH04501880A (fr)
KR (1) KR920701485A (fr)
AU (1) AU629395B2 (fr)
DE (1) DE3930767A1 (fr)
NZ (1) NZ235188A (fr)
RU (1) RU1838425C (fr)
WO (1) WO1991004343A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4316008A1 (de) * 1993-05-13 1994-11-17 Domaga Fa Verfahren und Vorrichtung zum Auftragen von Flüssigkeiten auf die Lederoberfläche oder ähnliche flache Materialien
AUPM761094A0 (en) * 1994-08-23 1994-09-15 Tanning Technologies Pty Ltd Treatment of hides
AUPO598197A0 (en) * 1997-04-03 1997-05-01 Future Tan Pty Ltd Treatment of hides
AUPO871397A0 (en) * 1997-08-22 1997-09-18 Future Tan Pty Ltd Improved treatment of hides
DE19961745A1 (de) * 1999-12-21 2001-06-28 Harald Suese Druck-Wechsel-Gerbgefäß
RU2272847C1 (ru) * 2004-10-13 2006-03-27 Равиль Фатхисламович Ситдыков Способ жидкостной обработки кожевенно-мехового сырья и устройство для его осуществления
CN107460264B (zh) * 2017-08-24 2019-04-12 夏欣磊 一种皮革加工用染色液流动的染色装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE822060C (de) * 1950-04-20 1951-11-22 Charvo Soc Verfahren und Vorrichtung zum selbsttaetigen Spritzen von Unterlagen, wie beispielsweise Haeuten, mit Fluessigkeiten, wie Farbloesungen, und deren Trocknung
DE2831617A1 (de) * 1978-07-19 1980-01-31 Arenco Bmd Maschfab Verfahren zur herstellung gegerbter haeute und felle
DE3702478A1 (de) * 1987-01-28 1988-08-11 Johs Krause Gmbh Maschinenfabr Vorrichtung zum behandeln von haeuten in nassprozessen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9104343A1 *

Also Published As

Publication number Publication date
WO1991004343A1 (fr) 1991-04-04
JPH04501880A (ja) 1992-04-02
DE3930767A1 (de) 1991-03-28
AU629395B2 (en) 1992-10-01
RU1838425C (ru) 1993-08-30
NZ235188A (en) 1992-03-26
AU6270890A (en) 1991-04-18
KR920701485A (ko) 1992-08-11

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