EP1110892A1 - Verfahren zur Handhabung von Metallplatten - Google Patents

Verfahren zur Handhabung von Metallplatten Download PDF

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Publication number
EP1110892A1
EP1110892A1 EP99204390A EP99204390A EP1110892A1 EP 1110892 A1 EP1110892 A1 EP 1110892A1 EP 99204390 A EP99204390 A EP 99204390A EP 99204390 A EP99204390 A EP 99204390A EP 1110892 A1 EP1110892 A1 EP 1110892A1
Authority
EP
European Patent Office
Prior art keywords
metal sheets
sheets
trains
rotary means
handling
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Withdrawn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
EP99204390A
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English (en)
French (fr)
Inventor
Léon Crosset
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.)
Nv Union Miniere Sa
Umicore NV SA
Original Assignee
Nv Union Miniere Sa
Union Miniere NV SA
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 Nv Union Miniere Sa, Union Miniere NV SA filed Critical Nv Union Miniere Sa
Priority to EP99204390A priority Critical patent/EP1110892A1/de
Priority to AU23688/01A priority patent/AU2368801A/en
Priority to PCT/EP2000/013175 priority patent/WO2001046052A1/fr
Priority to ARP000106757A priority patent/AR027018A1/es
Publication of EP1110892A1 publication Critical patent/EP1110892A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/68—Reducing the speed of articles as they advance

Definitions

  • Electrolysis is a commonly used process for the recovery and purification of non-ferrous metals: the metal is deposited under the effect of a current electric on both sides of a metal sheet used as support and called cathode. In the case of zinc metallurgy for example, the metal is deposited on a aluminum cathode.
  • the leaves are removed from the cathode by stripping the deposit, that is to say by tearing the semi-rigid metal sheets from their support.
  • the present invention concerns the evacuation and transport of metallic sheets once they have been torn from the cathode.
  • the stripping of the two faces of a cathode produced is two sheets metal that will be handled independently of each other, or only one metallic sheet composed of two superimposed thicknesses joined together by a metal bridge along one of the edges, and which will be handled as such.
  • This bridge metallic corresponds to the electrolytic deposit which forms on the edge at the bottom of the cathode when the latter is not provided with an insulating strip.
  • the evacuation system is therefore able to process both a single sheet and a double sheet.
  • Another technique is to drop the metal foil directly on a rubber conveyor belt without braking, checking or deflect it.
  • the rubber band alternately scrolls in both directions over a short distance to allow head-to-tail stacking.
  • Evacuation is by a band receiving conveyor leading to a fast conveyor belt which, thanks to its speed high, allows metal sheets to be thrown and stacked on a table elevating. This technique is described in patent EP 767256 B1.
  • the legislations are more and more restrictive. Through example in the United States, the noise level cannot exceed 85 dBA equivalent; in Europe, the accepted levels (Standard 86/188 / EEG) are 90 dBA equivalent on one working day, or 8 hours if the work is done on an 8-hour shift. In many current installations, values are still frequently measured that greatly exceed these levels.
  • a method of handling metal sheets through one or more several consecutive trains of opposite cylindrical rotary means comprising the steps of receiving the sheets between these rotary cylindrical means opposite and braking of the sheets by these cylindrical rotary means, the spacing between the opposite cylindrical means being less than the minimum thickness of the sheets, the peripheral surfaces of these cylindrical means comprising a material elastic, the peripheral speed of these cylindrical means being essentially equal to the speed of the metal sheets upon receipt of the sheets by these means, and the peripheral speed decreasing from said reception speed to the exit speed of leaves.
  • the speed of exit from the sheet of a train previous must be adapted to the speed of entry of a following train; in case there is only one train, or, at the end of the last train, this speed must be such that the sheet metal comes into contact with the receiving means without generating excessive noise.
  • this invention therefore allows a reduction significant noise to stay at acceptable noise levels.
  • the invention has also as advantages the simplicity of the train mechanics, the accessibility to any metal sheets blocked in the system, great ease maintenance and the low cost of maintenance. Sheet speed can be adjusted by changing the exit speed of the trains in order to allow to increase the rate of stripping. So the evacuation of the leaves fits into an optimized installation or, for example, the stripping system is set at a rate of 7.5 sec per stripped cathode.
  • the elastic material of the surfaces of contact has noise absorption characteristics and / or is non-slip.
  • the cylindrical means can be in the form of tubes coated with material elastic like rubber. Other materials are described in the objects of the following invention.
  • the method of handling metal sheets is characterized in that the trains of opposite cylindrical rotary means are mounted on two parallel axes each equipped with several wheels. It is important that the guiding of the metal sheets is very simple. For this, it suffices to mount several rotary means, preferably wheels, and for example two on each side of the sheets to be treated. As the cylindrical rotary means must slow down the sheets, it is certain that the braking force required by cylindrical rotary means, which is all the greater the heavier the sheet, is lower if the total braking force is distributed among several cylindrical rotary means.
  • Each train can be fitted with a detection device to detect the presence metal sheets which enter the train before they come into contact with the means cylindrical and to allow the slowdown phase to be triggered after taking metal sheet control.
  • the trains can be adjusted for adjust the speed of the wheels according to the known falling height of the leaves, characteristic specific to the stripping line; thus it becomes possible to eliminate the driving of the wheels by the metal or the sliding of the metal between the wheels, which would cause either rapid wear of the elastic material due to friction, or a less efficient operation. It is indeed important to regulate the speed of the wheels depending on the height of leaf fall to be able to control and slow down this fall.
  • a metal sheet handling process characterized in that the sheets from a previous train to a next train while staying in contact with the rotary means of each of these trains for a limited time.
  • the process for handling sheets metallic is characterized in that one or more trains have a system of pivoting of the cylindrical rotary means, said pivoting being effected around a axis parallel to and located at equal distance from the axes of rotation of the rotary means opposites.
  • This system allows you to change the inclination of the leaves in order to evacuate them easily on a conveyor belt which is normally below the transport device and which is generally oriented horizontally.
  • it is possible to deposit on the strip conveyor of the sheets which follow each other but whose thick part is alternately at the front and at the rear, which allows two plates to be stacked successive head to tail. You must be able to alternate the direction of the leaves to stack the leaves with a thick part on a thin part (head to tail) and thus avoid having unbalanced bundles of leaves.
  • the process for handling metal sheets is preferably carried out through two trains of opposite cylindrical rotary means, and is characterized in that only the last of these two trains is equipped with a pivoting system. It is also preferable that, in the handling process, the metal sheets advance under the effect of gravity and enter the first train of opposite cylindrical rotary means in an essentially vertical direction.
  • each train defines a stage, and according to the number of stages, it is necessary to distribute the braking forces.
  • the speed of the first stage must be adjusted according to the height of fall; when the sheet enters the second stage while still having its upper part in the first stage, the speed must be further reduced by applying significant braking.
  • the speed is further reduced to reach the speed that we want to have for depositing the sheet on the conveyor belt.
  • the sheets are introduced at least one by one into the first train of means rotary.
  • the invention makes it possible to receive leaves that would fall freely after leaf removal, so that the first evacuation train catches them instantly.
  • the process for handling sheets metal comprises a step of stacking on a device stacking of sheets fed by the last train of cylindrical rotary means opposites.
  • this stacking device comprises a conveyor belt able to transport sheets in two opposite directions.
  • This faculty of strip allows easy removal of the metal sheet from the cylindrical rotary means of the last train regardless of the inclination of it.
  • the process is designed in such a way that, according to the inclination given to the cylindrical rotary means, the strip goes into the adequate sense to properly take out the sheet.
  • the conveyor belt is normally equipped shock absorbers to avoid dropping the leaves on a rigid support fixed to the frame, to also reduce the height of fall and to avoid letting the sheet strike on a completely horizontal strip.
  • the number of support rollers is important as well as the choice of these support rollers to decrease among other things the noise level. These rolls can be soundproofed.
  • the transport method is characterized in that the last train is equipped with a pivoting system and that the tilting of the pivoting system leads the metal sheets to the conveyor belt of the device stacking so that the angle formed between the sheets and the conveyor belt is less than 90 °.
  • the last train can make it possible to deposit the sheets gently on a conveyor belt by limiting the distance that the upper part of the sheets must travel in order to fall on the conveyor belt, or even up to deposit the sheets almost horizontally on a conveyor belt located next to the last device in the extension of this plan. The closer the angle is to 0 °, the more the sheet will be horizontal and therefore, this sheet will then be deposited on the conveyor belt with a low drop height.
  • the practice requires to keep a compromise to allow a sufficient distance between the devices, to keep a good access and to avoid having to make swivels too fast and too sudden to keep the rate of passage of the sheets in the successive trains.
  • the present invention also relates to an apparatus for handling sheets using one of the methods described above, and the use of this handling for the evacuation of metallic sheets coming from the stripping of the electrolytic deposition on cathodes.
  • a preferred embodiment of the invention consists of a transport method for metallic sheets receiving the metallic sheets moved by the force of gravitation in a vertical direction and decreasing the speed of the leaves on contact on pneumatic means, and preferably supplying the sheets to a device stacking.
  • FIGS 1 to 4 show an apparatus for handling metal sheets according to the method described in the invention.
  • the apparatus is composed of several main parts which are the trains (1a, 1b) of cylindrical rotary means and the horizontal conveyor belt (2).
  • the apparatus consists of two stages of trains of cylindrical rotary means only.
  • the two trains are on the same axis (15) and are spaced a length less than the length of the metal sheet.
  • Each train of cylindrical rotary means is equipped with two pairs of rubberized wheels (4) placed face to face and separated by a measure less than the thickness of the metal sheets.
  • the pairs of wheels (4) of the same train (1a, 1b) are placed at a distance less than the width of the metal sheet.
  • the pressure of the wheels is maintained around the normal value used on motor vehicles, because too low a pressure causes a loss of braking efficiency and therefore of control of the fall of the metal sheet.
  • Each train comprises two motors (5), controlled by a variator, a hollow shaft reduction gear (6), as well as an axis on which the two rims (7) are mounted. Reducers and motors are normally dimensioned taking into account the drop height specific to the installation.
  • Motor frequency drives must take into account that the recovery of the energy (potential and kinetic) of the plate must be done very quickly.
  • the drives must be dimensioned large enough to possibly accept heating from continuous use and so for possibly receive heavier double sheets.
  • the parameters used do not must not make the braking too violent. This would cause overcurrents in the variators. Insufficient braking creates unwanted forces on the belt conveyor.
  • a local control box (which is not shown in the figures) having a set of commands allows the unlocking of the sheets in mode manual.
  • the lower gear is mounted on a cradle (10) which is articulated by several jacks (11) synchronized.
  • the cradle can take 3 positions: a horizontal position and two positions with tilting at 45 ° on either side of the horizontal.
  • the mechanism is designed to allow reaching a mechanical stop in each cradle positions.
  • the pivoting of the pivoting system is made thanks to the action of articulated cylinders.
  • These cylinders work in pairs of two cylinders identical mounted end to end. Each couple allows a particularly lengthening precise for the three positions of the cradle: short extension with the two cylinders fully retracted, intermediate extension with a fully retracted cylinder and the other fully extended, long stretch with the two cylinders fully extended.
  • the action of the cylinders is illustrated in Figures 1, 3 and 4.
  • the horizontal conveyor belt (2) is of a length equivalent to twice the length of the metal sheet and the width of the belt is slightly greater than the width of a metal sheet.
  • the strip is preferably made of very thick multilayer polyester. The maintenance of this strip is ensured by intermediate support rollers (12) damped by tensioners (13) with elastic joints. These rollers are filled with material to further reduce the noise of falling metal sheets. These intermediate rollers are distributed under the strip so that the 2 drop-off points (left and right) are made between 2 rollers in order to cushion the contact of the plate on the conveyor.
  • the number of intermediate rollers is normally 4, but can be adapted as appropriate.
  • the strip is equipped with a cleaning device (scraper type) of metal waste which would have been introduced between the strip and the rollers despite the different covers intended to guide this waste and which prevents the metal buds from damaging the cylinders of tape guiding. Guarantors on the edge of the cradle and on the sides of the conveyor belt prevent zinc particles from accumulating in the machine and, ultimately, disturbing its proper functioning.
  • the belt is driven by a geared motor (14) controlled by frequency converter.
  • the main components of the conveyor belt are therefore the gear motor, the belt, and the bearing. Doors and safety grilles are placed to prevent any accident in case of output of sheets out of the machine.
  • the handling process can be divided into four phases described below.
  • Phase 1 When the system starts, the wheelsets are driven at the rate of fall of the pair of metal sheets.
  • the first pair of opposite wheels receives the metal sheets directly under the leaf stripper.
  • the controlled motorization of the two pairs of wheels allows the metal sheet to be braked and evacuated without noise to the second pair of wheels.
  • This first deceleration is of the order of about 15% of the total deceleration that the system must apply to go from the speed of entry of the sheet to the speed of exit required from the sheet.
  • the deceleration applied to each stage also takes into account the braking capacity available at this stage.
  • Phase 2 When the sheet is engaged by the second set of wheels and is therefore maintained by the two trains at the same time, a second deceleration occurs thanks to the controlled motorization of the two sets of wheels. This second deceleration is the most important since it represents approximately 60% of the total deceleration necessary.
  • Phase 3 ( Figure 3): When the sheet has left the top gear, the bottom gear (1b) begins to pivot with the pair of sheets (16) caught between the wheels (4), and the third deceleration is started. This third and final deceleration is around 25% of the total deceleration. While decelerating, pivoting can begin because the metal sheet is no longer taken in the upper cylindrical means train. The direction of rotation is determined so as to place two successive pairs of sheets head to tail. It is asked to cause this pivoting as soon as possible because, thus, the metal sheet is well distributed over its length in the wheels and the weight of the sheet is therefore equally well distributed which limits the overhang. As soon as the sheet has left the upper gear (1a), the speed of this upper gear can return to its initial speed, namely the speed of fall of the metal sheet.
  • the direction of travel of the conveyor belt (2) is adapted to the direction of pivoting from the cradle (10).
  • the exit speeds of the last train, rotation of the cradle and conveyor belt travel are normally coordinated. A good balance allows flexible removal without friction or loss of time.
  • an adequate maximum exit speed could be 1 m / s. Beyond this limit, the impact on the conveyor belt may either generate too much noise, or damaging said band.
  • the ideal exit speed depends on the angle formed between the sheet metal and the conveyor belt on impact: the closer this angle is to 90 °, the lower the exit speed.
  • Phase 4 Once the sheet is placed on the strip, the cradle takes its place. The tape evacuates the sheet. The wheels accelerate until returning to the home speed.
  • Tests were carried out on damaged leaves. They were folded or torn leaves over a significant part of their height. It has been noted that the machine accepts damaged sheets. The folded sheets, even severely, are even straightened after passage. As for the thin sheets, they had a single sheet thickness of ⁇ 2 mm. The double sheet therefore had a thickness of approximately 4 mm, the normal thickness being 14 mm for a double sheet. Thin sheets are easily passed through the device. When such a sheet touches the conveyor belt, it curves (it does not have sufficient rigidity) but resumes its shape immediately after. A thin sheet was strongly folded and passed through without problems. A simple sheet of 2 mm thick also passed through the device without problem, and no winding of the sheet around the wheels was observed.
  • Sheets can go awry in the system, so they hit the guides and progress in the system correctly and are evacuated without problem.
  • Tests were performed with incorrect tire pressure to observe the behavior of the sheet when adhesion is reduced. Deflate the tires to a effect comparable to that caused by mounting tires with too much gap important. As a result, the tires can deflate up to around 1 bar without the handling process being too disturbed.
  • the average noise must be reduced to the normal working time of an operator, i.e. at 8 o'clock.
  • the value of 80 dBA is a value on a single cycle and not an average over 8 hours; the average value is necessarily lower following stops and breaks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Electrolytic Production Of Metals (AREA)
EP99204390A 1999-12-20 1999-12-20 Verfahren zur Handhabung von Metallplatten Withdrawn EP1110892A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP99204390A EP1110892A1 (de) 1999-12-20 1999-12-20 Verfahren zur Handhabung von Metallplatten
AU23688/01A AU2368801A (en) 1999-12-20 2000-12-15 Method for handling metal sheets
PCT/EP2000/013175 WO2001046052A1 (fr) 1999-12-20 2000-12-15 Procede de manutention de feuilles metalliques
ARP000106757A AR027018A1 (es) 1999-12-20 2000-12-20 Metodo de manipulacion de hojas metalicas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99204390A EP1110892A1 (de) 1999-12-20 1999-12-20 Verfahren zur Handhabung von Metallplatten

Publications (1)

Publication Number Publication Date
EP1110892A1 true EP1110892A1 (de) 2001-06-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99204390A Withdrawn EP1110892A1 (de) 1999-12-20 1999-12-20 Verfahren zur Handhabung von Metallplatten

Country Status (4)

Country Link
EP (1) EP1110892A1 (de)
AR (1) AR027018A1 (de)
AU (1) AU2368801A (de)
WO (1) WO2001046052A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102534693A (zh) * 2012-03-03 2012-07-04 彭桦 一种新型电解金属锰剥离机
CN102719860A (zh) * 2011-03-31 2012-10-10 昆山思拓机器有限公司 金属掩膜板剥离装置
CN102719861A (zh) * 2011-03-31 2012-10-10 昆山思拓机器有限公司 一种分离金属掩膜板的方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI116572B (fi) * 2004-08-27 2005-12-30 Outokumpu Oy Laite ja menetelmä metallilevyjen käsittelemiseksi
CN109735876A (zh) * 2019-01-28 2019-05-10 铜陵有色金属集团股份有限公司金冠铜业分公司 剥片机翻转机构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2258462A1 (en) * 1974-01-23 1975-08-18 British Copper Refiners Ltd Sequential electrolytic metal refining - e.g. copper, nickel or zinc by immersing unrefined electrodes in an acidified aq. soln of e.g. copper sulphate
JPS60232362A (ja) * 1984-04-27 1985-11-19 Nippon Steel Corp パイリング装置
EP0364017A2 (de) * 1988-10-11 1990-04-18 FIMI S.p.A. FABBRICA IMPIANTI MACCHINE INDUSTRIALI Maschine zum Abbremsen einer Serie von entlang einer Produktionslinie dicht aufeinanderfolgend wandernden Blechtafeln
EP0767256A1 (de) * 1995-10-06 1997-04-09 Asturiana De Zinc, S.A. Anlage zum Abstreifen von elektrolytisch niedergeschlagenen Schichten auf Kathoden

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2258462A1 (en) * 1974-01-23 1975-08-18 British Copper Refiners Ltd Sequential electrolytic metal refining - e.g. copper, nickel or zinc by immersing unrefined electrodes in an acidified aq. soln of e.g. copper sulphate
JPS60232362A (ja) * 1984-04-27 1985-11-19 Nippon Steel Corp パイリング装置
EP0364017A2 (de) * 1988-10-11 1990-04-18 FIMI S.p.A. FABBRICA IMPIANTI MACCHINE INDUSTRIALI Maschine zum Abbremsen einer Serie von entlang einer Produktionslinie dicht aufeinanderfolgend wandernden Blechtafeln
EP0767256A1 (de) * 1995-10-06 1997-04-09 Asturiana De Zinc, S.A. Anlage zum Abstreifen von elektrolytisch niedergeschlagenen Schichten auf Kathoden
EP0767256B1 (de) 1995-10-06 1998-12-02 Asturiana De Zinc, S.A. Anlage zum Abstreifen von elektrolytisch niedergeschlagenen Schichten auf Kathoden

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
22741: "Sheet deceleration apparatus", RESEARCH DISCLOSURE., no. 227, March 1983 (1983-03-01), INDUSTRIAL OPPORTUNITIES LTD. HAVANT., GB, XP002138151, ISSN: 0374-4353 *
PATENT ABSTRACTS OF JAPAN vol. 010, no. 096 (M - 469) 12 April 1986 (1986-04-12) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102719860A (zh) * 2011-03-31 2012-10-10 昆山思拓机器有限公司 金属掩膜板剥离装置
CN102719861A (zh) * 2011-03-31 2012-10-10 昆山思拓机器有限公司 一种分离金属掩膜板的方法
CN102719860B (zh) * 2011-03-31 2015-04-15 昆山思拓机器有限公司 金属掩膜板剥离装置
CN102719861B (zh) * 2011-03-31 2016-01-13 昆山思拓机器有限公司 一种分离金属掩膜板的方法
CN102534693A (zh) * 2012-03-03 2012-07-04 彭桦 一种新型电解金属锰剥离机
CN102534693B (zh) * 2012-03-03 2014-07-09 湖南宏阳科技有限公司 一种新型电解金属锰剥离机

Also Published As

Publication number Publication date
WO2001046052A1 (fr) 2001-06-28
AU2368801A (en) 2001-07-03
AR027018A1 (es) 2003-03-12

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