EP0002739B1 - Abwelkpresse - Google Patents
Abwelkpresse Download PDFInfo
- Publication number
- EP0002739B1 EP0002739B1 EP78101694A EP78101694A EP0002739B1 EP 0002739 B1 EP0002739 B1 EP 0002739B1 EP 78101694 A EP78101694 A EP 78101694A EP 78101694 A EP78101694 A EP 78101694A EP 0002739 B1 EP0002739 B1 EP 0002739B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- sammier
- counterpressure
- hose
- 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
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
- F26B5/14—Drying solid materials or objects by processes not involving the application of heat by applying pressure, e.g. wringing; by brushing; by wiping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/24—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using an endless pressing band
- B30B9/246—The material being conveyed around a drum between pressing bands
-
- 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
- C14B1/30—Pressing or rolling leather
- C14B1/34—Pressing or rolling leather by rotating movement of the pressing or rolling elements
-
- 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
Definitions
- the invention relates to a wilting press for leather and fur with a middle pressure roller with an elastically deformable jacket, counter pressure rollers supporting it on the circumferential side and with two co-moving by frictional engagement, the material to be squeezed out between receiving and moving through the conveyor belts formed between the pressure roller and the counter pressure rollers , of which at least the conveyor belt located outside in the area of the pressure roller consists of a water-permeable material.
- Wilting presses are used in the leather and fur industry to drain the goods. It depends in particular on the throughput and the remaining moisture, as well as on the treatment of the material when it wilts off.
- a wilting press with two press plates is known (DE-B-22 49 369), which works in intermittent operation.
- the material is brought between the two press plates with a conveyor.
- a pressure cushion is built up at least on a press plate which is spanned by a membrane, with which the introduced material is pressed.
- the intermittent operation of this wilting press brings only a small throughput and the large press area requires high pressures, which requires a correspondingly dimensioned machine structure. Despite the small throughput, such a wilting press is large in structure and expensive to buy and maintain.
- Wilting presses are also known in which the material is continuously conveyed through the machine.
- two conveyor belts are guided in parallel at a short distance from one another.
- On the outside of the conveyor belts act several successively arranged press runners or press rolls.
- the leather is inserted between the belts and pulled by them through the pressing members.
- a vacuum device is arranged behind each press zone and is intended to suck off the water that is squeezed out.
- This machine too, is complicated and expensive, and is very space-consuming due to the linear passage of the goods. The drainage is also not sufficient.
- a further known wilting press rigid pressure rollers and counter-pressure rollers are used, the counter-pressure rollers being pressed against the pressure roller by means of compression springs or pneumatic pressure pads.
- the conveyor belts are designed as felt belts and absorb the squeezed liquid.
- This known continuous wilting press is very expensive to maintain because the felt belts have to be replaced after an operating time of about 6 to 8 months because of their deformation, since they can no longer absorb the squeezed-out liquid to a sufficient extent.
- folds are pressed into the material in such a way that they cannot be completely removed during subsequent treatment.
- a roller press is known (DE-B-10 30 184), which is primarily used for pressing liquid from moist masses, e.g. Fruit mashing is suitable, but can also serve to drain leather. It has a large pressure roller with an elastic jacket and a large number of small counter-pressure rollers which are distributed close to one another over the circumference of the pressure roller. Two conveyor belts, which are entrained by friction, run through the nip, between which the material to be pressed is fed and from which it is transported through the nip. The outer conveyor belt is permeable, so that the squeezed liquid can run off to the outside.
- the pressure roller with its elastic jacket should either be under atmospheric pressure or be filled with a pressure medium. Obviously, only relatively low pressures are considered here, since the jacket of the pressure roller is strongly deformed inwards by each individual counter-pressure or support roller. Such an arrangement is unsuitable for wilting leather, since due to the wave-like deformations of the pressure roller, a skin running through the nip would be exposed to constantly changing tensile and thrust forces, which inevitably lead to the formation of wrinkles. In addition, very high pressures are required for wilting leather and furs, since only part of the water is available as surface water, but a very large part is capillary-bound.
- this capillary-bound water can only be expelled using high pressures, which, given the size of the skin and its uneven thickness, must also be applied over a large area with a changing size of the nip.
- Such pressures cannot be controlled with the known arrangement due to the strong flexing forces to which the elastic jacket is exposed.
- the invention is based on the object of designing the wilting press in such a way that the pressures required in particular for pressing off the capillary water can be applied with a gentle treatment of the skin.
- the arrangement of four counter-pressure rollers ensures that the hose is supported symmetrically.
- the centering of the hose between the counter-pressure rollers is achieved in that it is wrapped on the majority of its circumference by the conveyor belts, which - since they do not have to be made of elastic material - do not yield in the radial direction.
- retrofit zones are built up between the individual counter-pressure rollers by the conveyor belts and the goods lying between them running in tensioned condition over the pressure roller. The goods need only be smoothed once at the inlet and then maintains this position.
- the inlet for the material to be dewatered is provided via a counter-pressure roller arranged in the horizontal plane and the run is provided on the counter-pressure roller lying above after passing through the other counter-pressure rollers.
- the formation of the pressure pad on the pressure roller is carried out according to one embodiment so that the pressure roller is designed as a pipe section and is spaced from a hose section around that the pipe section and the hose section are airtightly connected to each other at the end faces, and that between the pipe section and the chamber formed in the tube section is filled with compressed air.
- the chamber can be under constant pressure or be pressurized and maintained during commissioning.
- a compressed air line is introduced into the pipe section, which is welded airtight into a bore in the wall of the pipe section and opens into the chamber between the pipe section and the hose section. It is therefore only necessary to supply the chamber and not the entire roller with compressed air.
- the centerpiece of the new wilting press is the pressure roller 11, which is equipped with a pressure pad and consists of a tube section 10 and an elastic hose 12 surrounding it.
- An airtight chamber 13 is formed between the outer surface of the pipe section 10 and the inner wall of the hose section 12.
- the inside diameter of the hose section 12 is therefore larger than the outside diameter of the pipe section 10.
- the pipe section 10 and the hose section 12 are of the same length and are connected to one another in an airtight manner on both end faces.
- a spacer ring 30 is applied to the outside of the tube section 10 in the region of the end face, over which the elastic hose 12 is placed, as can be seen in the partial section according to FIG.
- tensioning screws are adjustable which press individual tensioning segments 32 against the tube 12 and this in turn against the spacer ring 30.
- the mutually facing surfaces of the spacer ring 30 and the tensioning segments 32 are provided with coordinated, preferably circumferential profiles 31 and 33, which ensure a clear jamming of the hose 12.
- the clamping segments 32 which e.g. can be partially annular, a wedge surface 36.
- a corresponding wedge surface 37 of a tensioning device 34 acts against this and is tightened by means of coaxial screws.
- a compressed air line 25 is passed through the bearing axis 28 of the pressure roller, which is rotatably mounted in the bearing 29.
- the compressed air line 25 is guided into a bore 24 in the wall of the pipe section 10 and welded therein in an airtight manner, so that the compressed air line 25 opens into the chamber 13 between the pipe section 10 and the hose section 12.
- the compressed air line 25 is therefore non-rotatably connected to the pipe section 10 and the bearing axis 28.
- the end of the compressed air line 25 protruding from the bearing axis 28 is provided with a rotary coupling 26 so that a stationary compressed air connection can be attached.
- the chamber 13 is filled continuously or only during the operating time with compressed air of approx. 10 to 25 atm, so that the elastic hose 12 is pressed apart accordingly.
- This hose 12 is preferably provided with a fabric insert and has a wall thickness of 10 to 20 mm in order to withstand this pressure.
- each counter-pressure roller 14 15, 16 and 17 are arranged around the pressure roller, of which the counter-pressure rollers 14 and 16 are arranged approximately in a horizontal plane and the counter-pressure rollers 15 and 17 approximately in a vertical plane.
- These four counter-pressure rollers 14, 15, 16 and 17 form with the pressure roller 11 four narrow press zones, on which the hose 12 can hardly expand.
- the two conveyor belts 22 and 23 are provided for guiding the goods, at least the lower conveyor belt 22 being perforated and made of plastic or steel.
- the lower conveyor belt 22 forms with its loop from the deflecting roller 18 in front of the counter-pressure roller 14 a feed device for the material to be dewatered.
- the lower conveyor belt 22 encloses the hose 12, but faces the counter-pressure rollers 14, 15, 16 and 17 and passes through all the pressing zones.
- the upper conveyor belt 23 is also guided in the same way, but is turned towards the hose 12 and guided around the pressure roller.
- the deflecting roller 20 for the upper conveyor belt 23 is arranged so that the material fed on the lower conveyor belt is drawn in between the two conveyor belts 22 and 23 guided around the deflecting roller 20 and the inlet counter-pressure roller 14 and successively the pressing zones the counter pressure rollers 14, 15, 16 and 17 is supplied.
- the conveyor belts 22 and 23 only have a guiding function, and the squeezed liquid can flow through the openings of these conveyor belts.
- the dewatering process is determined by the pressure of the compressed air in the chamber 13.
- the counter-pressure rollers 14, 15, 16 and 17 are provided with a rubber coating and the elastic hose 12 also has sufficient flexibility in the press zones, the material is treated gently when it passes through this new wilting press and leaves the wilting press with a very small residual moisture. Since the hose 12 is bulged between the pressing zones and pressed against the conveyor belts 22 and 23, a repressing operation is carried out between the counter-pressure rollers 14 and 15, 15 and 16 and 16 and 17.
- the driven pressure roller takes the conveyor belts 22 and 23 in the indicated arrow directions by friction and also the counter-pressure rollers 14, 15, 16 and 17, as well as the deflection rollers 18, 19, 20 and 21 are inevitably rotated by friction in the directions indicated.
- the loop of the lower conveyor belt 22 is closed via the deflection roller 19, the lower counter-pressure roller 15 to the inlet deflection roller 18.
- the section of the lower conveyor belt 22 between the outlet counter-pressure roller 17 and the deflection roller 19 serves as a discharge device for the dewatered material.
- the upper conveyor belt 23 is guided around the deflecting roller 21 and the loop is closed directly by the inlet deflecting roller 20.
- the upper counter-pressure roller 17 is driven and takes both the conveyor belts and the pressure roller and thus also the other counter-pressure rollers 14, 15, 16 with them.
- the counter-pressure rollers 14, 15, 16 and 17 can be provided on their outer surfaces with a profiling which mainly removes water to the side.
- the squeezed liquid can easily be collected in a tub.
- two pressure rollers can be arranged one behind the other in the conveying direction.
- two adjacent counter-pressure rollers can be used at the same time work together two pressure rollers, so that only six counter pressure rollers are required, but eight press zones are formed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Fiber Materials (AREA)
- Drying Of Solid Materials (AREA)
- Press Drives And Press Lines (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2757257 | 1977-12-22 | ||
DE2757257A DE2757257C3 (de) | 1977-12-22 | 1977-12-22 | Abwelkpresse für Leder, Pelze u.dgl. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0002739A1 EP0002739A1 (de) | 1979-07-11 |
EP0002739B1 true EP0002739B1 (de) | 1981-10-14 |
Family
ID=6026872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP78101694A Expired EP0002739B1 (de) | 1977-12-22 | 1978-12-15 | Abwelkpresse |
Country Status (8)
Country | Link |
---|---|
US (1) | US4208892A (es) |
EP (1) | EP0002739B1 (es) |
JP (1) | JPS5498301A (es) |
BR (1) | BR7808401A (es) |
CS (1) | CS207747B2 (es) |
DE (2) | DE2757257C3 (es) |
ES (1) | ES476176A1 (es) |
YU (1) | YU301678A (es) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0095122A3 (de) * | 1982-05-14 | 1984-09-19 | Kurt Hacker | Durchlaufverfahren zur Wärme- und/oder Druckbehandlung von weichflexiblen Flachmaterialstücken sowie Einrichtung zur Durchführung des Verfahrens |
FI68656C (fi) * | 1984-01-25 | 1985-10-10 | Leena Viljanmaa | Foerfarande och anordning foer spaenning av hudar |
DE8606507U1 (de) * | 1986-03-10 | 1986-04-30 | Gebr. Bellmer GmbH + Co KG Maschinenfabrik, 75223 Niefern-Öschelbronn | Walze für Pressen |
DE3726757A1 (de) * | 1987-08-12 | 1989-02-23 | Moenus Turner Maschf | Durchlauf-abwelkpresse |
US6854301B1 (en) * | 2004-04-13 | 2005-02-15 | Albany International Corp. | Extended nip press for the leather industry |
DK176518B1 (da) * | 2006-01-24 | 2008-06-30 | Dansk Mink Papir As | Indretning for hel eller delvis tömning/fyldning af et törreaggregat med opretstående ekspansionstaner. |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB118054A (es) * | 1900-01-01 | |||
FR453093A (fr) * | 1912-01-17 | 1913-05-30 | Gustav Adolf Schettler | Perfectionnements aux machines pour le traitement des cuirs et peaux |
BE525016A (es) * | 1952-12-13 | 1900-01-01 | ||
US3040554A (en) * | 1959-02-18 | 1962-06-26 | Swift & Co | Removing leather from leather press |
US3525160A (en) * | 1967-05-12 | 1970-08-25 | Jiri Dokoupil | Process and arrangement for drainage of wet leather and similar fibrous material |
US3707749A (en) * | 1970-10-12 | 1973-01-02 | Gen Tire & Rubber Co | Variable pressure bed roller |
DE2052879A1 (de) * | 1970-10-28 | 1972-05-04 | Rotter, Erhard F , Dipl Ing , 4000 Dusseldorf | Einrichtung zum Entwässern von durch laufenden Textilbahnen, gegebenenfalls in Prozeßeinheit mit Klotzprozessen |
US3699621A (en) * | 1970-12-16 | 1972-10-24 | Ici Ltd | Rollers |
US3798933A (en) * | 1972-05-03 | 1974-03-26 | Arendt H | Wringer |
DE2249369C3 (de) * | 1972-10-09 | 1979-01-18 | Josef Dipl.-Ing. 6000 Frankfurt Busek | Presse zum Entwässern von Flächengebilden, wie Lederhäuten |
DE2351307B2 (de) * | 1973-10-12 | 1977-02-17 | Strojosvit, N.P., Krnov (Tschechoslowakei) | Vorrichtung zum kontinuierlichen entwaessern von leder oder lederartigem material |
DE2615131A1 (de) * | 1976-04-07 | 1977-10-27 | Trockentechnik Gmbh | Vorrichtung zum befeuchten und konditionieren von ledern und aehnlichen materialien |
-
1977
- 1977-12-22 DE DE2757257A patent/DE2757257C3/de not_active Expired
-
1978
- 1978-12-15 DE DE7878101694T patent/DE2861175D1/de not_active Expired
- 1978-12-15 EP EP78101694A patent/EP0002739B1/de not_active Expired
- 1978-12-20 ES ES476176A patent/ES476176A1/es not_active Expired
- 1978-12-20 CS CS788631A patent/CS207747B2/cs unknown
- 1978-12-21 YU YU03016/78A patent/YU301678A/xx unknown
- 1978-12-21 JP JP15692978A patent/JPS5498301A/ja active Pending
- 1978-12-21 BR BR7808401A patent/BR7808401A/pt unknown
- 1978-12-22 US US05/972,213 patent/US4208892A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE2861175D1 (de) | 1981-12-24 |
JPS5498301A (en) | 1979-08-03 |
DE2757257C3 (de) | 1981-11-12 |
US4208892A (en) | 1980-06-24 |
ES476176A1 (es) | 1979-05-16 |
EP0002739A1 (de) | 1979-07-11 |
BR7808401A (pt) | 1980-05-20 |
DE2757257A1 (de) | 1979-06-28 |
YU301678A (en) | 1982-06-30 |
DE2757257B2 (de) | 1981-03-12 |
CS207747B2 (en) | 1981-08-31 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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AK | Designated contracting states |
Designated state(s): BE DE FR GB IT NL |
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17P | Request for examination filed | ||
ITF | It: translation for a ep patent filed |
Owner name: DR. ING. A. RACHELI & C. |
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