EP2279855A2 - Presse et procédé pour l'alimentation et l'extraction de pièces pour la presse - Google Patents

Presse et procédé pour l'alimentation et l'extraction de pièces pour la presse Download PDF

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Publication number
EP2279855A2
EP2279855A2 EP10007844A EP10007844A EP2279855A2 EP 2279855 A2 EP2279855 A2 EP 2279855A2 EP 10007844 A EP10007844 A EP 10007844A EP 10007844 A EP10007844 A EP 10007844A EP 2279855 A2 EP2279855 A2 EP 2279855A2
Authority
EP
European Patent Office
Prior art keywords
press
conveyor belt
correction
gripper
belt
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Withdrawn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
EP10007844A
Other languages
German (de)
English (en)
Inventor
Norbert Damm
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.)
Robert Buerkle GmbH
Original Assignee
Robert Buerkle 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 Robert Buerkle GmbH filed Critical Robert Buerkle GmbH
Publication of EP2279855A2 publication Critical patent/EP2279855A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B7/00—Presses characterised by a particular arrangement of the pressing members
    • B30B7/02—Presses characterised by a particular arrangement of the pressing members having several platens arranged one above the other
    • B30B7/023—Feeding or discharging means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B7/00—Presses characterised by a particular arrangement of the pressing members
    • B30B7/02—Presses characterised by a particular arrangement of the pressing members having several platens arranged one above the other

Definitions

  • the invention relates to a press according to the preamble of claim 1 and a method for feeding and removing workpieces into and out of a press floor of such a press according to the preamble of claim 17.
  • a press of the present type accordingly comprises at least one press floor with a lower and an upper press plate, which are movable relative to each other for opening and closing the press floor, and with a circulating around the lower press belt conveyor for feeding in and out of a workpiece to be pressed into the and from the press floor.
  • the lower press plate of the press floor is provided with a tensioning device for tensioning and relaxing the conveyor belt, by means of which the conveyor belt is tensioned to feed or remove the workpiece.
  • the conveyor belt is relaxed by means of the clamping device, so that the pressing operation can be effected uninfluenced by a tension of the conveyor belt.
  • a press of the present type is also provided with means for tape running correction of the conveyor belt.
  • a press of the present type this is designed as a multi-daylight press, wherein in each case the upper press plate of a press floor is at the same time the lower press plate of the next higher press floor.
  • the lower strand of the circulating around the lower pressure plate conveyor belt of a press floor runs accordingly below the upper pressure plate of another, located below press floor through it.
  • an active belt control for strip correction is always a potential source of error in the overall process.
  • the present invention seeks to simplify and improve a press and a method of the type mentioned in terms of tape running correction.
  • the core of the present invention is therefore that a tape running correction by a correction movement by means of a displacement of the conveyor belt takes place transversely to its direction.
  • the displacement device used for this purpose is in this case synchronized with the tensioning device, that a displacement of the conveyor belt to carry out a correction movement at standstill of the conveyor belt and in its relaxed state.
  • the tape running correction is thus not carried out during operation of the conveyor belt by means of an active belt control, but there is a position correction of the conveyor belt at a standstill and in the discharge state, and only if there is a need for it.
  • the correction movement takes place only when required after reaching or exceeding a predetermined deviation of an actual position of the conveyor belt or a band edge of the same from an ideal target position.
  • This allows a pragmatic tape correction, in which only takes place when the course of the conveyor belt has exceeded a tolerable level or threatens to exceed.
  • the frequency of the correction movements of the conveyor belt is advantageously minimized.
  • the correction movement can be carried out in each case with a fixed displacement path. Since this invention can correspond to the achievement or exceeding of a predetermined actual target deviation, results in a very simple but effective tape running correction.
  • a band edge detection sensor which detects the horizontal actual position of a band edge of the conveyor belt.
  • This can be, for example, an imaging sensor having a predetermined Deviation of the actual position of the belt edge of the conveyor belt from a desired position can detect and optionally generates a correction signal, but it may also be a majority of sensors, in particular of two band edge detection sensors, which has a desired range for the horizontal position enclose the belt edge of the conveyor belt between them and generate a correction signal when the belt edge enters the measuring range of one of the two belt edge detection sensors. Furthermore, it is possible to place at each band edge in each case a band edge detection sensor to define such a desired range.
  • a band edge detection sensor can be provided which monitors a target threshold for the position of a belt edge of the conveyor belt, while the tensioning device with an asymmetric acting Voltage applied so that this shifts horizontally during operation to the target threshold value. Upon reaching the same, a correction movement is then triggered at the next relaxed standstill of the conveyor belt, which resets the conveyor belt horizontally again.
  • the displacement device of the press preferably comprises at least one gripper with two openable and closable gripper halves, which clamp the conveyor belt in the closed state between them.
  • These gripper halves can be designed in particular as gripper bars or as clamping jaws.
  • a gripper which is arranged laterally next to the conveyor belt, pull or push the conveyor belt, or if necessary, both.
  • the conveyor belt has no high intrinsic stability, it makes sense to let the gripper pull only, in which case optionally grippers are arranged on both sides in order to pull the conveyor belt in both transverse directions can.
  • the gripper halves over the entire width of the conveyor belt away extend so that they can shift this horizontally, without dividing this into a pulling or sliding movement.
  • the lower gripper half of the gripper may be formed as a conveyor belt guide, which preferably assumes a fixed vertical position, while the upper gripper half is held vertically movable, in particular pivotable or eccentrically rotatable.
  • the gripper thus also assumes a leading or supporting function for the conveyor belt, while it is structurally advantageous simple design.
  • the two gripper halves of the gripper can be held on at least one common base part of the gripper which is movable transversely to the running direction of the conveyor belt to execute a correction movement, which in turn is preferably fastened laterally next to the conveyor belt on the lower press plate or the tensioning device.
  • This base part is expediently provided with electric and / or pneumatic drives for the closing movement of the gripper and the correction movement.
  • Particularly fail-safe is an embodiment of the gripper or the displacement device as a pair of pliers, which is provided with a common drive for the closing movement and the correction movement, wherein the sequence of closing movement and the correction movement in a conventional manner by means of a hinge assembly and return springs is realized ,
  • a multi-daylight press ie there are several press floors, each with a circulating around the respective lower press plate conveyor belt arranged one above the other;
  • the lower gripper halves of the grippers can be provided with rollers at least for those press floors which are arranged above another press floor. This offers advantages because the lower gripper halves come to lie on the conveyor belt of the next press floor below it when closing the press. The equipment with rollers then reduces the friction between the lower gripper half and this conveyor belt on the one hand and the lower strand of the upper conveyor belt on the other.
  • the present invention is used in a press for laminating substantially plate-shaped workpieces under pressure and heat.
  • the lower pressure plate and the upper pressure plate in the closed state by means of circulating single or multi-part seals a vacuum chamber within which a workpiece or several workpieces can be laminated simultaneously.
  • a membrane divides this vacuum chamber into an evacuable product space provided for receiving at least one workpiece and an evacuable and / or pressurizable pressure space. Due to a pressure difference in the vacuum chamber created by evacuating the product space and / or by pressurizing the pressure space, the membrane is pressed against the work piece, thereby applying the ballast necessary for lamination to the work piece.
  • the underside of the vacuum chamber is formed by a heating plate, so that the process heat necessary for lamination is introduced directly into the workpiece during the pressing process.
  • Such a laminating press is preferably used for laminating photovoltaic modules.
  • These usually consist of a solar cell layer, which together with their electrical contacting elements between a glass plate and a weatherproof film, or arranged between two glass plates and laminated by means of one or more adhesive layers with the glass plates or films and so moisture-tight and weatherproof in a translucent layer composite is encapsulated.
  • the adhesives used here are highly adhesive and place particular demands on the conveyor belts in particular.
  • the workpiece is conveyed by means of the conveyor belt into the product space of the vacuum chamber and then the conveyor belt is relaxed. Thereafter, the vacuum chamber is closed and normally first evacuated the pressure chamber of the vacuum chamber to pull the membrane up to the upper half of the chamber. Then, usually with a certain time offset, and the product space is evacuated, the evacuation of both spaces of the vacuum chamber is controlled so that there is always a differential pressure between the pressure chamber and the product space remains holding the membrane in the upper half of the chamber and prevents the membrane prematurely comes into contact with the workpiece.
  • the pressure space When the product chamber of the press chamber has been evacuated to a set pressure, which is usually below one millibar, the pressure space is vented so that the pressure difference between the pressure space and the product space reverses and the membrane hangs onto the workpiece.
  • a desired contact pressure of the membrane By controlling the pressure in the pressure chamber, a desired contact pressure of the membrane is then adjusted in order to generate the load required for lamination on the workpiece.
  • the pressure and the process heat together then ensure the softening or activating of the adhesive layer and, if appropriate, its curing or crosslinking.
  • this conveyor belt Since the workpiece during lamination does not lie directly on the bottom of the vacuum chamber or the heating plate, but on the conveyor belt, this conveyor belt must be comparatively thin. Normally, the thickness of this conveyor belt is less than 1 mm in order to impede as little as possible the sealing of the circumferential seals between the lower pressure plate and the upper pressure plate; because the conveyor belt passes through the vacuum chamber even with the press closed and is thus clamped on two sides of the vacuum chamber in the circumferential seals. In the area of the workpieces, the conveyor belts are normally even thinner, if possible only between 0.2 and 0.5 mm, in order to ensure the best possible heat transfer between the heating plate and the workpiece.
  • conveyor belts for laminating photovoltaic modules are usually coated with PTFE.
  • PTFE tetrachloroethylene
  • the present invention enables effective tape running correction in conveyor belts that pass through about serially arranged in succession Mehretagenpressen together to perform a short-cycle lamination process.
  • Each conveyor belt passes through the n-th floor of two or more consecutively arranged multi-daylight presses, which work together in a timed manner. That these nth floors of several presses of one and the same conveyor belt, reduces the design effort considerably.
  • the present invention finally also results in the great advantage that the tensioning device is no longer used for active belt travel control. This makes it possible to tension the conveyor belt just just enough to produce the required frictional engagement between the conveyor belt and its drive roller. As a result, the tensioning device can be subjected to typically only about a quarter to a third of the clamping force usual in the state of the art.
  • FIGS. 1 to 4 is a press with a total of four press floors 1, 1 ', 1 "and 1"' shown, which can be synchronously moved together and moved apart in a press frame 2 vertically.
  • FIG. 1 shows the open press while FIG. 4 represents the closed press.
  • Each press floor 1 consists of a lower press plate 3 and an upper press plate 4, wherein a conveyor belt 5 for loading and unloading the press floor 1 circulates around the lower press plate 3.
  • a tensioning device 6, consisting essentially of a pneumatic piston-cylinder unit acting on the axis of a deflection roller 7 of the conveyor belt 5, ensures that the conveyor belt 5 rotates under tension around the deflection roller 7 and a drive roller 8 in order to not shown) to retract workpiece in the press floor 1 or extend this from the press floor 1.
  • a displacement device 9 is arranged for tape running correction.
  • an inventively designed multi-daylight press is a laminating press for laminating photovoltaic modules.
  • the respective upper press plate 4 (which is at the same time the lower press plate 3 'of the respective press floor 1' arranged above it) carries on its underside a double frame 10 in which a membrane 11 is clamped.
  • the double frame 10 forms with upper 12 and lower circumferential seals 13 which respectively seal against the lower press plate 3 and the upper press plate 4, together with the adjacent press plates 3, 4, a vacuum chamber with channels (not shown) for evacuation and / or pressurization ,
  • FIG. 1 now shows the situation before loading the press with workpieces.
  • the press is open (ie all the press floors 1, 1 ', 1 ", 1"' are opened synchronously), and the conveyor belts 5 are tensioned symmetrically by means of their tensioning devices 6 in such a way that the friction of the conveyor belts on the drive rollers 8 is sufficient. to perform a defined conveying movement for retracting the workpieces. Due to the symmetrical tension of the conveyor belts 5 none of them depends on the left or right side, so that the Einfahrweg for the workpieces in all press floors 1 is free.
  • FIG. 2 shows the press in a subsequent process phase:
  • the conveyor belts 5 have been relaxed by the piston-cylinder units 6 collapsed have been. Accordingly, the lower run of the conveyor belts 5 now symmetrically through.
  • FIG. 3 is hinted that in the already in FIG. 2 shown situation of the still open press with relaxed conveyor belts 5 a tape running correction is performed.
  • the displacement devices 9 are activated so that they detect the respective conveyor belts 5 by clamping and (as is naturally not recognizable in this illustration) move horizontally, transversely to the direction of tape travel. This will be explained below with reference to FIGS. 5 and 6 described in more detail.
  • FIG. 4 Finally, the situation at the beginning of the actual lamination process is shown.
  • the conveyor belts 5 are still relaxed while the press has been closed.
  • the displacement devices 9 are again inactive, as well as the tensioning devices 6.
  • the vacuum chambers formed within the double frame 10 between the respective lower pressure plates 3 and each upper pressure plates 4 each form a product space 14 and a pressure chamber 15, which are separated by the membrane 11, and
  • the lamination process runs as known per se.
  • the press is opened again and the conveyor belts 5 are tensioned, so that the in FIG. 1 shown situation arises again.
  • the laminated workpieces can be discharged and new, to be laminated workpieces be promoted.
  • FIGS. 5 and 6 show in a schematic front view of details in the Figures 2 and 3 illustrated situations of the multi-daylight press. Accordingly, in FIG. 5 the press is opened, the conveyor belts 5 are relaxed, and the displacement devices 9 are inactive. In FIG. 6 the press is also open and the conveyor belts 5 are relaxed; However, here the displacement devices 9 are active and perform a correction movement 16 of the tape.
  • FIGS. 5 and 6 in each case only one press floor 1 is shown in full, with parts of the press floor lying above 1 ', in particular the conveyor belt 5' are necessarily shown with.
  • the lower pressure plate 3 carries as a displacement device 9 a gripper with a lower gripper half 17 and an upper gripper half 18. These two gripper halves 17, 18 are fixed to a horizontally movable transversely to the direction of tape travel base 19, which in turn held on the lower pressure plate 3 and with (not shown) drives for opening and closing the two gripper halves 17, 18 and for performing the correction movement 16 is provided.
  • the lower gripper half 17 is formed as a vertically non-movable, fixed to the base member 19 guide rail for the conveyor belt 5, while the upper gripper half 18 is provided with two pivot axes to selectively release the conveyor belt 5 ( FIG. 5 ) or between the two gripper halves 17, 18 ( FIG. 6 ).
  • the displacement device 9 engages the lower run of the conveyor belt 5 and is able to pull this in both directions transverse to the direction of tape travel or push.
  • two band edge detection sensors 20, 21 are arranged, which are designed to be very simple and robust and accordingly each have only a small area acting measuring range.
  • These two band-edge detection sensors 20, 21 clamp a setpoint range for the horizontal position of the band edge of the conveyor belt 5 between them and generate a correction signal as soon as the monitored band edge leaves this setpoint range.
  • the correction stroke of the correction movement 16, which is transmitted from the displacement device 9 on the conveyor belt 5, corresponds to about half of the extension of the desired range, which is spanned by the band edge monitoring sensors 20, 21.
  • This correction stroke can therefore be chosen constant; because as soon as one of the two BandkantenÜberwachungssensoren 20, 21 emits a correction signal, the displacement device 9 will perform the corresponding correction movement in the relaxed state at the next tape stop, whereby the band edge of the conveyor belt 5 passes again approximately centrally between the two monitoring sensors 20, 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Belt Conveyors (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Press Drives And Press Lines (AREA)
EP10007844A 2009-07-31 2010-07-28 Presse et procédé pour l'alimentation et l'extraction de pièces pour la presse Withdrawn EP2279855A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009035633A DE102009035633A1 (de) 2009-07-31 2009-07-31 Presse und Verfahren zum Ein- und Ausfördern von Werkstücken in die und aus der Presse

Publications (1)

Publication Number Publication Date
EP2279855A2 true EP2279855A2 (fr) 2011-02-02

Family

ID=43032958

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10007844A Withdrawn EP2279855A2 (fr) 2009-07-31 2010-07-28 Presse et procédé pour l'alimentation et l'extraction de pièces pour la presse

Country Status (6)

Country Link
US (1) US20110023733A1 (fr)
EP (1) EP2279855A2 (fr)
JP (1) JP2011031304A (fr)
CN (1) CN101987524A (fr)
DE (1) DE102009035633A1 (fr)
TW (1) TW201114586A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107351441A (zh) * 2017-05-22 2017-11-17 江苏国中防火材料有限公司 一种防火涂料输送均布分散系统
CN108190365B (zh) * 2018-02-07 2024-04-19 温康纳(常州)机械制造有限公司 一种压机用输送装置
CN111169085A (zh) * 2020-02-12 2020-05-19 汪骑 一种传动微调整轻型链板流水线式出料成型一体设备

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2090369U (zh) * 1991-04-23 1991-12-11 滁县地区无线电厂 调整输送皮带跑偏的装置
IT1313117B1 (it) * 1999-08-25 2002-06-17 Morton Int Inc Apparecchiatura di applicazione a vuoto dotata di mezzi trasportatorie procedimento per applicare un resist a film secco ad un pannello di
US6805771B1 (en) * 1999-09-20 2004-10-19 Hunter Douglas Industries B.V. Pressure laminator apparatus and non woven fabric formed thereby
ES2253252T3 (es) * 1999-09-20 2006-06-01 Hunter Douglas Inc. Aparato de laminacion a presion.
GB0410136D0 (en) * 2004-05-06 2004-06-09 Sortex Ltd Conveyer belt system
CN1962218B (zh) * 2006-12-05 2010-05-12 上海人造板机器厂有限公司 皮带张紧调偏装置及使用方法
DE102007025380A1 (de) * 2007-05-30 2008-12-04 Robert Bürkle GmbH Mehretagen-Laminierpresse

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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Also Published As

Publication number Publication date
JP2011031304A (ja) 2011-02-17
TW201114586A (en) 2011-05-01
CN101987524A (zh) 2011-03-23
DE102009035633A1 (de) 2011-02-03
US20110023733A1 (en) 2011-02-03

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