Apparatus and method for providing bobbins for production machines in the energy cell manufacturing industry and equipment in the energy cell manufacturing industry

Abstract

An apparatus for preparing bobbins (2) with wound web-like material for an industrial production machine (3) for producing energy cells, the apparatus comprising at least one bobbin changing device (4, 5, 6, 7) and a bobbin handling device (8) configured to supply the bobbins (2) to the at least one bobbin changing device (4, 5, 6, 7), the bobbin changing device (4, 5, 6, 7) and the bobbin handling device (8) being arranged in a common air-conditioned chamber (9) and provided with a gate (10) configured so that the bobbins (2) can be transported through the gate (10) into the chamber (9).

Description

[Technical field]

[0001] The invention relates to an apparatus and a corresponding method for preparing a bobbin with a wound web-like material for an industrial production machine for producing energy cells according to the preamble of claim 1. Furthermore, the invention relates to an industrial installation for producing energy cells. [Background technology]

[0002] In principle, it is known in the prior art to use energy cells and energy storage devices in stationary installations, such as motor vehicles, other land vehicles, ships, aircraft, and photovoltaic power installations, for example in the form of battery cells or fuel cells, where very large amounts of energy must be stored for long periods of time. For this purpose, such energy cells have a structure consisting of a number of segments that are stacked into a stack. The segments are each formed from alternating anode and cathode sheets, which are separated from one another by separator sheets that are also manufactured as segments. The segments are cut beforehand in the manufacturing process and then stacked one on top of the other in a defined sequence into a stack and bonded to one another by lamination.

[0003] In this case, the electrode sheets, i.e. the cathode and anode sheets, are usually formed starting from a so-called daughter coil, which in turn is formed starting from a mother coil. The mother coil has an end wound electrode web, the width of which is then too large to form a cell stack therefrom. The mother coil is therefore first unwound and cut longitudinally, so that the width of the electrode web is reduced or a number of electrode webs of smaller width are formed. The electrode webs thus cut with reduced width are then rewound again as so-called daughter coils. The daughter coils can then be unwound again, from which segments are formed by cutting transversely, the segments then being suitable for forming a cell stack.

[0004] Segments in the form of separator sheets are also formed starting from the daughter coils by transversely cutting the web unwound from the respective daughter coil.

[0005] Fabrication of the daughter coils is typically performed on a first production machine that is spatially separated from a second production machine for cutting and stacking the segments.

[0006] A coil is also commonly referred to as a bobbin, and therefore the daughter coil may be referred to as a bobbin.

[0007] Furthermore, it is known in the prior art that inter alia the cutting into segments and the stacking of the segments takes place under defined climatic conditions, in order to reliably guarantee a high quality of the formed cell stack. Summary of the Invention [Problem to be solved by the invention]

[0008] The object of the present invention is to provide an apparatus and a corresponding method for preparing a bobbin with a wound web-like material for an industrial production machine for producing energy cells while maintaining preset climatic conditions, as well as a corresponding industrial installation for producing energy cells. [Means for solving the problem]

[0009] This problem is solved by the features of the independent claims. Further preferred embodiments of the invention can be seen from the dependent claims, the drawings and the corresponding description.

[0010] According to a first aspect of the present application, the problem is solved by an apparatus for preparing a bobbin with a wound web-like material for an industrial production machine for producing energy cells, the apparatus comprising at least one bobbin changing device and a bobbin handling device configured to supply a bobbin to the at least one bobbin changing device, in which the bobbin changing device and the bobbin handling device are arranged in a common air-conditioning chamber and a gate is provided, the gate being configured such that the bobbin can be transported through the gate into the air-conditioning chamber.

[0011] The gating allows reducing the air exchange with the surrounding environment when the bobbins are conveyed into the air conditioning chamber, so that the climatic conditions in the air conditioning chamber can be kept at a constant level, which allows the wound material web on the bobbins to be treated in a reliable process.

[0012] The conditioned chamber preferably comprises an air conditioning device for adjusting a pre-set climate in the conditioned chamber, by means of which e.g. the room temperature, the relative humidity, the static pressure and / or the purity of the air can be adjusted or controlled.

[0013] Through the gate, the bobbin can be conveyed into the climate chamber where it can be positioned so that it can be accessed and held by a bobbin handling device that then passes the bobbin to at least one bobbin changing device.

[0014] The at least one bobbin changing device is preferably configured to rotatably receive at least one bobbin so that the wound web of material on the bobbin can be fed to an industrial production machine that produces energy cells.

[0015] Preferably, the bobbin changing device has two receiving mandrels, each of which can rotatably accommodate one bobbin. Thus, for example, the first receiving mandrel has a bobbin with the material web being unwound, and the second receiving mandrel has a new, unused bobbin. Just before the unwound material web is completely unwound, the material web can be connected to the material web of the unused bobbin, which is then called splicing. Preferably, the used bobbin is subsequently pulled off the first receiving mandrel and removed from the air conditioning chamber. This can also be done in an appropriate manner via a gate. Subsequently, a new, unused bobbin is slipped onto the first receiving mandrel, which is then connected to the unwound material web, which is located on the second receiving mandrel, by splicing. By alternately supplying the first and second receiving mandrels with new, unused bobbins, the production machine can be reliably, preferably even uninterruptedly, supplied with the corresponding material web.

[0016] Preferably, the gate has a gate chamber that can be insulated from the flow technology, through which the bobbins can be transported from the periphery into the air-conditioning chamber. The gate chamber can be, for example, sealable with respect to the periphery and the air-conditioning chamber. The gate chamber reduces the amount of air exchanged between the air-conditioning chamber and the periphery when new bobbins are transported into the air-conditioning chamber or used bobbins are transported out of the air-conditioning chamber. The air-conditioning device therefore needs to output less power to compensate for possible differences in the actual climate from the target climate. This reduces the energy requirements of the air-conditioning device.

[0017] Preferably, at least one closable peripheral door is provided for connecting the gate chamber to the periphery, and at least one closable climate chamber door is provided for connecting the gate chamber to the climate chamber. Further preferably, a control unit is provided for controlling the at least one peripheral door and the at least one climate chamber door so that only one of the doors can be opened at a time. This prevents, for example, the climate chamber and the peripheral door from being opened at the same time, and also prevents, for example, two peripheral doors or two climate chamber doors from being opened at the same time. By only opening one of the doors respectively, the amount of air exchanged between the climate chamber and the periphery can be further reduced.

[0018] For example, exactly one peripheral door and multiple climate control chamber doors may be provided. Alternatively, for example, exactly one climate control chamber door and multiple peripheral doors may be provided. Of course, it is also conceivable to provide multiple, for example exactly four peripheral doors and multiple, for example exactly four climate control chamber doors as well.

[0019] According to a preferred embodiment, it is proposed that the bobbin handling device is configured to automatically, preferably fully automatically, receive and transfer the bobbin to at least one bobbin changing device. Preferably, the handling device is configured to receive the bobbin from the bobbin carrier. The bobbin handling device may have a sensor unit that is adapted to detect the preparation of the bobbin and its preparation position. Furthermore, the bobbin handling device may for example have a robot arm, which has a receiver for holding the bobbin. Furthermore, the robot arm is configured to transfer the bobbin starting from a transfer position in the air conditioning chamber to at least one bobbin changing device. Since the bobbin is preferably transported into the air conditioning chamber via a gate by a bobbin carrier in the form of a transport carriage, the bobbin handling device may also be referred to as a depalletizer. By automatically transferring the bobbin to the bobbin changing device, the amount of air exchanged between the air conditioning chamber and the surroundings can be further reduced, since an exchange of additional air amounts that may occur when an operator enters the air conditioning chamber can be prevented.

[0020] The bobbin handling device is preferably also configured to remove used bobbins, from which the material web has been completely or almost completely unwound, from the bobbin changing device and transfer them to the aforementioned transfer position, from where they can be transported by means of the bobbin carrier through the gate and out of the air conditioning chamber.

[0021] Preferably, at least one bobbin exchange device accommodates a bobbin with a wound electrode web or separator web. More preferably, the bobbin is inserted onto a receiving mandrel in the bobbin exchange device, so that the bobbin is accommodated rotatably relative to the bobbin exchange device. The electrode web may be an anode web or a cathode web.

[0022] More preferably, the apparatus comprises exactly four bobbin changing devices, where a first bobbin changing device accommodates bobbins with anode webs, a second bobbin changing device accommodates bobbins with cathode webs, and a third and a fourth bobbin changing device accommodate bobbins with separator webs, respectively. With such equipped bobbin changing devices, starting material for forming monocells can be prepared for industrial production machines that produce energy cells.

[0023] A monocell comprises a first separator sheet, an anode sheet disposed thereon, a second separator sheet disposed thereon, and a cathode sheet disposed thereon, and the monocell may have layers in the following order: first separator sheet, cathode sheet disposed thereon, second separator sheet disposed thereon, and anode sheet disposed thereon.

[0024] The four bobbin changing devices are preferably loaded with the aforementioned bobbins by a single common bobbin handling device, which simplifies the construction of the device overall since additional bobbin changing devices can be omitted.

[0025] According to a further preferred embodiment, the gate has a number of transport paths, preferably parallel to one another, via which the bobbins can be transported into the air-conditioning chamber. Further preferably, one peripheral door and one air-conditioning door are respectively assigned to each transport path. The parallel connected arrangement of the transport paths allows the bobbin handling device to be supplied with various types of bobbins, for example anode webs, cathode webs or separator webs, almost without delay. Furthermore, the transport paths lead to unique predefined transfer positions, where the bobbins are transferred to the bobbin handling device.

[0026] According to a second aspect of the present application, the problem is solved by an industrial installation for producing energy cells, the installation comprising the aforementioned device and at least one production machine, which is arranged completely or partly in an air-conditioning chamber with at least one bobbin changing device and bobbin handling device. Preferably, the production machine comprises a cutting device and more preferably additionally a cell stacking device. By means of the cutting device, the material web unwound from the bobbin can be cut transversely to form segments. By means of the cell stacking device, the segments can then be stacked one above the other to form a cell stack. Naturally, the production machine may comprise further processing units, for example a stacking device and / or a device for forming or attaching lead-out lugs.

[0027] By arranging the production machine at least partially within the air conditioning chamber, the air exchange between the air conditioning chamber and the surroundings can be further reduced.

[0028] According to a third aspect of the present application, the problem is solved by a method for preparing a web-like material wound on a bobbin for an industrial production machine for producing energy cells, the method being carried out using the above-mentioned device or using the above-mentioned installation. For technical effects and advantages related to the proposed method, reference is made to the above-mentioned explanations related to the device and the installation.

[0029] Preferably, at least one bobbin is accommodated in a bobbin carrier in the periphery of the air conditioning chamber, and the bobbin carrier loaded with at least one bobbin is transported from the periphery into the air conditioning chamber via a gate. Preferably, the bobbin carrier is mobile, more preferably autonomously mobile. The bobbin carrier preferably has a housing, in which one or more bobbins can be accommodated. The housing thus forms a transport chamber for the bobbins. The transport chamber can be flow-technically insulated from its periphery. For example, the transport chamber can be sealed from the periphery. The transport chamber can be loaded with bobbins via at least one access door.

[0030] Preferably, the bobbin carrier has at least one transport mandrel in the transport chamber, on which the bobbins can be accommodated for transport. After loading, at least one transport door is closed and in this state the bobbin carrier is gated. After passing through the gate, an access door is opened in the air conditioning chamber and the bobbins are removed from the transport chamber, preferably by a bobbin handling device.

[0031] More preferably, the bobbin carrier has two transport mandrels, so that for example on a first transport mandrel a new, unused bobbin can be transported through a gate into the air conditioning chamber, and on a second receiving mandrel a used bobbin can be transported from the air conditioning chamber through a gate into the periphery. Alternatively, two new, unused bobbins can be transported into the air conditioning chamber simultaneously on the two transport mandrels of the bobbin carrier.

[0032] Hereinafter, the present invention will be described based on preferred embodiments with reference to the accompanying drawings. [Brief description of the drawings]

[0033] [Figure 1] 1 shows a perspective view of an industrial facility for producing energy cells. [Diagram 2] 1 shows a cross-sectional top view of an apparatus for preparing bobbins for use in industrial production machines for producing energy cells. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] Figure 1 shows an installation 100 for manufacturing cell stacks for the industrial production of energy cells. The installation 100 comprises a device 1 used to prepare a bobbin 2 (see Figure 2) with a wound web of material for a production machine 3, which is also a component part of the installation 100.

[0035] The apparatus 1 comprises an air-conditioning chamber 9, in which the production machine 3 is also arranged, so that the production of the cell stacks can be carried out under pre-defined climatic conditions. For this purpose, the air-conditioning chamber 9 comprises a not shown air-conditioning device, by means of which the temperature, the relative air humidity, the static pressure and / or the purity of the air can be controlled.

[0036] Furthermore, a gate 10 is provided, through which a bobbin carrier 22 in the form of a movable transport vehicle having a bobbin 2 (see FIG. 2) attached thereto can be brought from a periphery 12 of the air-conditioning chamber 9 into the air-conditioning chamber 9. In this embodiment, the bobbin carrier 22 is an unmanned transport vehicle capable of autonomous travel.

[0037] The gate 10 has a gate chamber 11, which can be insulated from the flow technology perspective both from the periphery 12 and from the air conditioning chamber 9. Furthermore, the gate 10 has four periphery doors 13, 14, 15, 16, via which the gate chamber 11 is accessible from the periphery 12. Opposite the periphery doors 13, 14, 15, 16, four air conditioning chamber doors 17, 18, 19, 20 (see FIG. 2) are provided, via which the gate chamber 11 is connected to the air conditioning chamber 9.

[0038] The bobbin carrier 22 shown in Fig. 1 is in a waiting position in front of the peripheral door 15. As soon as the peripheral door 15 is opened, the bobbin carrier 22 runs into the gate chamber 11 and the peripheral door 15 is closed again. Only when the peripheral door 15 is completely closed is the air-conditioning chamber door 19, which is arranged opposite the peripheral door 15, opened (see Fig. 2) so that the bobbin carrier 22 can run into the air-conditioning chamber 9.

[0039] As can further be seen from Fig. 1, the bobbin carrier 22 has a housing 23 for forming a transport chamber in which the bobbins 2 can be transported while maintaining a microclimate, which in this embodiment can be maintained by hermetic sealing of the transport chamber formed by the housing 23 against the surroundings. Due to the fact that the transport distances and transport times are usually relatively short, active open-loop and / or closed-loop control of the climate (air environment) in the transport chamber is not necessary. In principle, however, it is also possible to equip the bobbin carrier 22 with a mobile air conditioning unit.

[0040] The housing 23 of the bobbin carrier 22 has an access door 32 for loading and unloading the bobbins 2 into and from the bobbin carrier 22. The access door 32 is only opened once the bobbin carrier 22 has arrived at the climate-conditioning chamber 9 and the corresponding climate-conditioning chamber door 19 is closed. The loading of new, unused bobbins into the bobbin carrier 22 is preferably also performed in a separate climate-conditioning chamber, not shown in detail.

[0041] For the coordinated opening and closing of the perimeter doors 13, 14, 15, 16 and the climate chamber doors 17, 18, 19, 20, the device 1 further comprises a control unit 21. The control unit 21 is arranged so that only one of the doors 16, 17, 18, 19, 20, respectively, is opened, since this reduces the air exchange between the perimeter 12 and the climate chamber 9.

[0042] The bobbins 2 brought into the air conditioning chamber 9 through the gate 10 are subsequently supplied to the production machine 3 by a bobbin handling device 8 and four bobbin changing devices 3, 4, 5, 6 (see FIG. 2) also located in the air conditioning chamber 9.

[0043] The production machine 3 has a cutting device, not shown, and a cell stacking device, also not shown. By means of the cutting device, the material web unwound from the bobbin 2 can be cut transversely to form segments. By means of the cell stacking device, the segments are then stacked one above the other to form cell stacks. The production machine 3 is arranged completely within the conditioned chamber 9 in this example.

[0044] 2 shows the device 1 in a sectional top view. It can be seen that the four parallel transport paths of the gate 10 are defined by the peripheral doors 13, 14, 15, 16 and the climate chamber doors 17, 18, 19, 20 which are arranged opposite each other in pairs.

[0045] It can also be seen that within the air conditioning chamber 9 a bobbin handling device 8 and four bobbin changing devices 4, 5, 6, 7 are arranged.

[0046] Between the peripheral door 13 and the climate chamber door 17 is located a first transport path of the gate 10 which leads to a first transfer position 24 arranged in the climate chamber 9 .

[0047] Between the peripheral door 14 and the climate chamber door 18 is located a second transport path of the gate 10 which leads to a second transfer position 25 arranged in the climate chamber 9 .

[0048] Between the peripheral door 15 and the climate chamber door 19 is located a third transport path of the gate 10 which leads to a third transfer position 26 arranged in the climate chamber 9 .

[0049] Between the peripheral door 16 and the climate chamber door 20 is a fourth transport path of the gate 10 which leads to a fourth transfer position 27 arranged in the climate chamber 9 .

[0050] Furthermore, as shown here, each transfer position 24, 25, 26 or 27 may be assigned an intermediate receiving section 28, 28, 29, 31, respectively, which is capable of temporarily receiving at least one bobbin 2.

[0051] In FIG. 2, the bobbin carrier 22 located in the gate chamber 11 is made to travel to the handover position 24 after the air conditioning chamber door 17 is opened.

[0052] The bobbin carrier 22 in this embodiment has two transport mandrels, not shown, for respectively accommodating a bobbin 2. On the first transport mandrel a new, unused bobbin 2 can be brought into the air-conditioning chamber 9. On the second transport mandrel of the bobbin carrier 22, in the air-conditioning chamber 2, a used bobbin 2 can be loaded.

[0053] Thus, for example, a used bobbin 2 can be received in the intermediate storage section 28. As soon as the bobbin carrier 22 has arrived at the first transfer position 24, the climate chamber door 17 is closed and the transport chamber of the bobbin carrier 22 is opened, the used bobbin 2 can be slid by the handling device 8 from the intermediate storage section 28 onto an empty transport mandrel of the bobbin carrier 22. Following this, a new, unused bobbin 2 can be removed by the handling device 8 from the other transport mandrel of the bobbin carrier 22 and handed over to one of the bobbin changer devices 3, 4, 5, 6.

[0054] Alternatively, both transport mandrels may be used to transport two bobbins 2 simultaneously into the air conditioning chamber 9. In this case, the subsequent transport of a new, unused bobbin 2 to one of the bobbin changing devices 4, 5, 6 or 7 can likewise take place via one of the intermediate receivers 28, 29, 30 and / or 31.

[0055] In this embodiment, the bobbin changing device 4 is loaded with two bobbins 2 each with a wound cathode web, the bobbin changing device 4 is loaded with two bobbins 2 each with a wound anode web, the bobbin changing device 5 is loaded with two bobbins 2 each with a separator web, and the bobbin changing device 6 is loaded with two bobbins 2 each with a separator web. Of course, the bobbin changing devices 4, 5, 6, 7 may be arranged in an alternative order.

[0056] In this embodiment, each bobbin changing device 4, 5, 6, 7 has two receiving mandrels, i.e. a first receiving mandrel for the unwound bobbin 2 and a second receiving mandrel for a new, unused bobbin 2, so that the material web of an almost completely unwound bobbin 2 can be connected to the material web of a new, unused bobbin by splicing.

[0057] In the present embodiment, the transfer positions 24, 25, 26, 27 are each assigned to a specific type of bobbin 2. At the transfer position 24, only bobbins 2 with wound cathode webs are supplied, at the transfer position 25, only bobbins 2 with wound anode webs are supplied, and at the transfer positions 26, 27, only bobbins 2 with wound separator webs are supplied. Of course, alternative assignments of bobbin types to the transfer positions 24, 25, 26, 27 are also conceivable. The bobbins 2 prepared at the transfer positions 24, 25, 26, 27 are then transferred by the bobbin handling device 8 to the corresponding bobbin changing devices 4, 5, 6, 7.

[0058] The used bobbin 2 can be transferred by the bobbin handling device 8 from the respective bobbin changer 4 , 5 , 6 or 7 to the bobbin carrier 22 at one of the transfer positions 24 , 25 , 26 or 27 so that the used bobbin 2 can be disposed of via the gate 10 .

[0059] Furthermore, the autonomously moving bobbin carrier 22 is controlled by its own control unit or by the control unit 21 shown in Fig. 1 in an open or closed loop manner so that it passes through the gate 10 only when the respective transfer position 24, 25, 26 or 27 is free. In this way, it is guaranteed that it can reach the transfer position 24, 25, 26, 27 unhindered and unnecessary opening of the gate chamber 11 is prevented.

[0060] Via the bobbin changers 4, 5, 6, 7, the production machine 3 shown in FIG. 1 is supplied with a corresponding material web by unwinding the material web from a bobbin 2 which is rotatably accommodated in the bobbin changers 4, 5, 6, 7. [Explanation of symbols]

[0061] 1 device 2 Bobbin 3. Production Machinery 4. Bobbin changer 5. Bobbin changer 6 Bobbin changer 7 Bobbin changer 8 Bobbin handling device 9. Air Conditioning Chamber 10 Gates 11 Gate Chamber 12 Periphery 13 Peripheral Door 14 Periphery Door 15 Periphery Door 16 Periphery Door 17 Air conditioning chamber door 18 Air conditioning chamber door 19 Air conditioning chamber door 20 Air conditioning chamber door 21 Control unit 22 Bobbin Carrier 23 Housing 24 Handover position 25 Handover position 26 Handover position 27 Handover position 28 Intermediate storage section 29 Intermediate storage section 30 Intermediate storage section 31 Intermediate storage section 32 Access Door 100 equipment

Claims

1. A device (1) for preparing a bobbin (2) with a wound web-like material for an industrial production machine (3) for producing energy cells, comprising: At least one bobbin changing device (4, 5, 6, 7); a bobbin handling device (8) configured to supply bobbins (2) to at least one bobbin changing device (4, 5, 6, 7); An apparatus comprising: The bobbin changing device (4, 5, 6, 7) and the bobbin handling device (8) are arranged in a common air-conditioning chamber (9), A gate (10) is provided, the gate (10) being configured such that a bobbin (2) can be transported through the gate (10) into the air conditioning chamber (9).

1. An apparatus (1).

2. 2. The device (1) according to claim 1, characterized in that the gate (10) has a gate chamber (11) which can be insulated in terms of flow technology, via which a bobbin (2) can be transported from the periphery (12) into the air-conditioning chamber (9).

3. At least one closable peripheral door (13, 14, 15, 16) is provided for connecting said gate chamber (11) to a peripheral portion (12), At least one closable climate chamber door (17, 18, 19, 20) is provided for connecting the gate chamber (11) to the climate chamber (9).

3. Apparatus (1) according to claim 2, characterized in that

4. 4. The device (1) according to claim 3, characterized in that a control unit (21) is provided for controlling at least one peripheral door (13, 14, 15, 16) and at least one climate chamber door (17, 18, 19, 20) so that only one of the doors can be opened at a time.

5. 5. Apparatus (1) according to claim 3 or 4, characterized in that there is provided exactly one peripheral door (13, 14, 15, 16) and a number of climate chamber doors (17, 18, 19, 20).

6. 5. Apparatus (1) according to claim 3 or 4, characterized in that exactly one climate chamber door (17, 18, 19, 20) and a number of peripheral doors (13, 14, 15, 16) are provided.

7. The apparatus (1) according to any one of claims 1 to 6, characterized in that the bobbin handling device (8) is configured to automatically receive and transfer a bobbin (2) to at least one of the bobbin changing devices (4, 5, 6, 7).

8. 8. Apparatus (1) according to any one of claims 1 to 7, characterized in that at least one of the bobbin changing devices (4, 5, 6, 7) receives a bobbin (2) with a wound electrode web or separator web.

9. 9. The device (1) according to any one of claims 1 to 8, characterized in that the gate (10) has a number of transport paths, preferably parallel to one another, via which bobbins (2) can be transported into the air-conditioning chamber (9).

10. In an industrial facility (100) for producing energy cells, The installation (100) comprises a device (1) according to any one of claims 1 to 9 and at least one production machine (3), 10. The installation, characterized in that at least one said production machine (3) is arranged completely or partly within said conditioned chamber (9) with at least one said bobbin changing device (4, 5, 6, 7) and said bobbin handling device (8).

11. A method for preparing a web of material wound on a bobbin (2) for an industrial production machine (3) for producing energy cells, the method comprising the steps of:

11. Method, characterized in that the method (200) is carried out using a device (1) according to any of claims 1 to 9 or using an installation (100) according to claim 10.

12. At least one bobbin (2) is housed in a bobbin carrier (22) at the periphery (12) of the air conditioning chamber (9); 12. The method according to claim 11, characterized in that the bobbin carrier (22) loaded with at least one bobbin (2) is transported from the periphery (12) into the air conditioning chamber (9) through the gate (10).

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