DE102019212130A1 - CHANGING CORRUGATOR - Google Patents

Abstract

The invention relates to a corrugator (10) comprising sequences of rotating mold jaws, at least one changing device (16, 18) which is set up to exchange a mold jaw, and a supply device (30) which is set up to hold a predetermined mold jaw in a waiting position (WP1, WP2) to provide the changing device (16, 18) from a plurality of mold jaws (36) arranged outside the series of mold jaws arranged around the corrugator (10) and / or to remove one of the mold jaws present at the waiting position (WP1, WP2) and to feed these mold jaws to a plurality of mold jaws (36) arranged outside of the series of mold jaws surrounding the corrugator (10).

Description

The invention relates to a corrugator for producing pipes, in particular corrugated pipes.

Corrugators are used, for example, to manufacture corrugated pipes. In this case, for example, a plastic material is introduced into the corrugator and, by means of overpressure and / or underpressure, is brought to bear against molding surfaces which are formed on the mold jaws of the corrugator in order to form the corrugated pipe. The corrugator usually comprises a plurality of mold jaws which have the molding surfaces. The mold jaws typically move in a rotating manner on the corrugator, so that depending on the rotational speed, number and size of the mold jaws, one and the same mold jaw repeatedly passes a defined position on the corrugator after a predetermined time.

If one now wants to produce corrugated pipes with a uniform diameter but different lengths, the corrugator can be equipped with molding jaws in such a way that all molding surfaces of the molding jaws are identical to one another. In this way, an endless corrugated pipe with a uniform diameter can be produced. In a subsequent processing step, this endless corrugated pipe can then be cut to the desired lengths.

If, on the other hand, you want to manufacture corrugated pipes which have a variable diameter over their length, for example an area with a larger diameter compared to the rest of the corrugated pipe, the corrugator can be equipped with mold jaws which enable the production of corrugated pipe sections with a small diameter of corrugated pipe sections with increasing diameter, a production of corrugated pipe sections with a large diameter and the production of corrugated pipe sections with decreasing diameter. However, due to the system, that is, due to the way in which the corrugator works, only an endless corrugated tube can be produced in which the enlarged diameter occurs in a constant periodic sequence. If, for example, corrugated pipes are desired which have exactly one section with an enlarged diameter, then these can only be produced in a single length without producing large waste of material.

However, if you want to produce different corrugated pipes which, for example, have a different number of sections with an enlarged diameter, but the same overall length, the equipping of the corrugator for each corrugated pipe has to be reconfigured in a complex manner. The corrugator is usually equipped by hand or using complex additional units. The process has to be interrupted, in particular a corrugator has to be brought to a standstill.

Because of this high expenditure of time and money to equip a corrugator, small series or even one-off production of specific corrugated pipes are often not feasible.

It is therefore the object of the present invention to provide a corrugator which makes it possible to flexibly adapt the design of a corrugated pipe to be produced during the production process and thereby reduce the set-up costs of the corrugator.

This object is achieved by a corrugator for the production of pipes, in particular corrugated pipes, comprehensively
at least two sequences of revolving mold jaws, each having at least one shaping surface, two mold jaws bearing against one another in a predetermined area of the corrugator in such a way that their shaping surfaces form a shape for forming a tube,
at least one changing device, which is set up to exchange a mold jaw of the corresponding sequence of mold jaws for a mold jaw provided at a waiting position assigned to the changing device,
wherein the changing device is further set up to change the mold jaw while the sequence of mold jaws is being advanced on the corrugator, and
wherein the corrugator further comprises a provision device which is set up to remove a predetermined mold jaw from a plurality of mold jaws, which is arranged outside the series of mold jaws surrounding the corrugator, and to provide it to the waiting position of the changing device and / or one at the waiting position to remove existing mold jaws and to supply these mold jaws to the plurality of mold jaws arranged outside the series of mold jaws surrounding the corrugator.

In this way, the provision device can remove a corresponding mold jaw from a storage device and make it available at the waiting position. If a mold then passes through the rotating sequence of mold jaws, which can be taken from the sequence of mold jaws on the basis of a previous determination, the changing device can remove this mold jaw from the sequence of mold jaws and at the same time insert the mold jaws provided at the waiting position into the sequence of mold jaws.

After the changing process, the removed mold jaw can be removed from this corresponding waiting position by the provision device and, for example, stored in the storage device of the plurality of mold jaws which are not part of the sequence of mold jaws rotating around the corrugator.

In order to be able to guarantee an exact exchange of the mold jaws, it can be advantageous that the changing device is set up to apply a first predetermined force, for example a predefined pressure, against the sequence of rotating mold jaws as soon as the mold jaw to be removed enters the changing device . If the mold jaw to be removed has then completely entered the changing device, the changing device can be set up to carry out the changing process with a second predetermined force, for example a pressure. In particular, the second predetermined force can be greater than the first predetermined force. The use of an, in particular electronically controlled, force curve is also conceivable here. Furthermore, the changing device can be designed in such a way that a receiving width of the changing device, i.e. a width of the section of the changing device which receives a mold jaw to be removed, removes it from the sequence of rotating mold jaws and removes a mold jaw provided at the waiting position into the sequence of inserts circumferential mold jaws, essentially corresponds to the width of a single mold jaw. In other words, the “width” of an individual mold jaw or the changing device is a dimension which is measured along a direction of advancement of the sequence of mold jaws on the corrugator.

However, since it is almost impossible to manufacture all the mold jaws of the corrugator with an exactly identical width, a play compensation unit can also be provided on the corrugator, which is set up in the event that the mold jaw to be removed has a greater width than the mold jaw to be inserted to close a gap between adjacent mold jaws, and in the event that the mold jaw to be removed has a smaller width than the mold jaw to be inserted, a pushing apart of the two mold jaws adjacent to the mold jaw to be removed to allow the wider mold jaw between these two adjacent mold jaws to be able to insert. The play compensation unit can electromechanically detect and compensate for play between adjacent mold jaws after the changing process.

The play compensation can be done by changing the length of the orbit. Corrugators can consist of several modules arranged next to one another for this purpose, there being start and / or end modules which contain a curved area of the orbit and / or intermediate modules which form a straight area of the corrugator. To set the game, the start and / or end modules can be moved towards or away from the intermediate modules. However, only the end module, which is also referred to as the “outlet module”, is preferably adjusted, since a drive unit for driving the mold jaws in the corrugator can be located directly on the start module, which is also referred to as the “inlet module”. In this case, the start and / or end modules can advantageously run in a guide (for example a T-slot or a dovetail guide) introduced into the base plate of the corrugator.

The local change of the module can take place via at least one motor-driven spindle. The electrical signal for adjustment for this can come from a computer unit which, on the basis of a previously measured play between the mold jaws, can determine a corresponding angular rotation of the spindle and thus a displacement of the start and / or end module. For this purpose, the game can be detected using a measuring device, for example an optical unit, which comprises a light-emitting and a light-receiving unit and / or a camera, which is set up to detect a distance between two mold jaws. The measuring device can preferably be arranged in an inlet area of mold jaws in the corrugator or in front of the drive unit, since a corresponding play can reach a maximum size shortly before this drive unit. This is because the drive unit for driving the mold jaws in the corrugator can push them in their direction of rotation so that the mold jaws can rest against one another in the direction of rotation after the drive unit. In order to detect the mold jaws, markings in particular can be attached to the mold jaws.

As an alternative or in addition to optical detection, detection using RFID or QR code can also be carried out. Thus, even when using an RFID or QR technology, a sequence of successive molding jaw types can be recorded at the same time and compared, for example, with a predetermined sequence of molding jaw types. A deviation between the recorded and the predetermined sequence of mold jaws can be output as an error signal, for example.

Furthermore, the mold jaws can run in a largely closed channel at least along a section of a “return”, i.e. a section of the circulation path of a respective sequence of mold jaws that does not belong to the predetermined area of the corrugator in which the tube is formed. The largely closed channel can, however, have openings through which an exchange of air present in the channel with ambient air and / or a removal of foreign bodies present in the channel is made possible. In the area of the changing device, the largely closed channel can have further interruptions, on the one hand to enable the mold jaws to be changed by the changing device and, on the other hand, to allow the provision device to remove and provide mold jaws from the waiting position. The further interruptions can be permanently open or can be opened during operation and / or essentially closed by a section of the changing device.

In a further development of the present invention, the majority of the mold jaws arranged outside the series of mold jaws surrounding the corrugator can be arranged in an area which, in particular, is completely outside a section of the corrugator which is defined by the series of peripheral mold jaws and / or outside a Section of the corrugator, which is arranged in a direction perpendicular to a plane of rotation of a sequence of mold jaws above and / or below the section defined by the sequence of circumferential mold jaws. If a respective sequence of mold jaws rotating around the corrugator forms a horizontal circuit that is essentially oval or O-shaped, the majority of the mold jaws arranged outside can neither inside the 0 shape nor vertically above or below the through the 0 shape defined area. In this way, it can be made possible that a structural space required by the corrugator according to the invention is essentially identical to a similar conventional corrugator. A storage device for the externally arranged plurality of mold jaws can be removed from an assigned sequence of mold jaws rotating around the corrugator or can be arranged directly adjacent to the respective sequence. In particular, a respective storage device for molding jaws, which is assigned to a corresponding sequence of rotating molding jaws, can be arranged in a common horizontal plane with this sequence of rotating molding jaws.

Furthermore, the provision device can be set up to feed a mold jaw removed from the waiting position to a storage position which is assigned to the plurality of mold jaws arranged outside the series of mold jaws that run around the corrugator. The storage position is not limited to a single local location of a storage device, which is connected to the storage position, but two mold jaws removed one after the other from the waiting position can be fed to a storage position at different locations of a common storage device.

The memory position can be an individual memory position for a respective type of mold jaw or for each mold jaw in a memory device. That is, in the memory device, each mold jaw can be assigned a memory position of its own, which can be uniquely identified, for example, by a row and column number. Alternatively or additionally, the storage device can be divided into areas in which mold jaws are only stored separately according to different types of mold jaws, for example according to the molding surface of the mold jaw with a small diameter, after the molding surface of the mold jaw with a large diameter, after the molding surface of the mold jaw with increasing diameter and after Forming surface of the mold jaw with decreasing diameter. In this way, the same storage positions can be filled with different mold jaws of the same type, so that the overall space requirement of the storage device can be reduced. Of course, other known storage methods are also conceivable here, such as, for example, so-called chaotic storage, in which free storage spaces are filled with molding jaws, regardless of the design of the molding jaws. The mold jaws can also be distinguished from one another by an individual and / or type-based identifier by a corresponding unit, for example using RFID, barcodes or other codes, such as respective mechanical markings at predetermined positions.

Alternatively, the storage position can be the same position of a storage device for all mold jaws which are removed from the waiting position by the provision device and supplied to the plurality of mold jaws arranged outside the series of mold jaws arranged around the corrugator. Thus, the supply device can always feed a mold jaw removed from the waiting position, regardless of the design of the mold jaw, to the same storage position of the storage device. Because the provision device only must be set up to move mold jaws between a single storage position and the waiting position or positions of the associated changing device, the provision device can be designed in a significantly simplified manner.

A transport device can be assigned to the storage position, which is set up to transport a molding jaw provided by the supply device at the storage position away from the storage position and / or to transport one molding jaw from the plurality of molding jaws arranged outside the series of molding jaws that run around the corrugator to the To transport storage position, so that this mold jaw can be removed from the provision device. In this way, the mold jaws fed to the storage position of the storage device can be transported to the respective storage locations, as already described above. It is also conceivable that the transport device is designed as a drag chain or the like, which moves the plurality of mold jaws arranged in the storage device, or at least a subset thereof, in a circumferential manner. The drag chain can, when it has come into engagement with a mold jaw stored at the storage position by the provision device, be displaced in such a way that a free section of the drag chain is again assigned to the memory position, so that a mold jaw can be picked up again from the memory position. Furthermore, the drag chain or an associated drive device can receive a corresponding signal from a control unit in order to provide a predetermined mold jaw of the drag chain at the storage position of the storage unit, so that this can be removed from the provision device. For this purpose, the drag chain can in particular be drivable both forwards and backwards.

In a further development of the present invention, the provision device can comprise at least one robot arrangement which is set up to detect at least one mold jaw and to move it between the waiting position and the plurality of mold jaws arranged outside the series of mold jaws surrounding the corrugator, in particular the storage position. For this purpose, the robot arrangement can comprise at least one gripper, which is set up to grasp at least one respective mold jaw, and an arm, via which the at least one gripper can be displaced between the storage position and a waiting position.

The robot arrangement can advantageously be designed to be displaceable along precisely two axes, in particular along two axes perpendicular to one another. This very simply designed robot arrangement can thus be set up to move the gripper of the robot arrangement vertically upwards from a waiting position, then horizontally in the direction of a storage device and there vertically downwards to a storage position. Such a robot arrangement can be implemented in a very space-saving manner, so that, if necessary, several of these robot arrangements can be placed closely adjacent to one another.

The changing device can also be set up to move during the changing process of the mold jaws in parallel, and in particular at a substantially identical speed, to the displacement of the sequence of rotating mold jaws in the area of the changing device. If a molding jaw is exchanged for another molding jaw during operation, i.e. while the sequence of rotating molding jaws continues to move, the molding jaws of the sequence of rotating molding jaws that follow the molding jaws to be exchanged press against the changing device during the changing process. This can lead to an interruption of the continuously rotating sequence of mold jaws or even damage to parts of the corrugator. In order to avoid this, the changing device can be mounted on the corrugator in such a way that it can be displaced over a predetermined section together with the sequence of rotating mold jaws. For this purpose, the changing device can be actively driven together with the movement of the sequence of rotating mold jaws, or it can also be passively "dragged along" by the sequence of rotating molding jaws.

The changing device can also be set up to return to a starting position after changing the mold jaws before changing the mold jaws, so that the mold jaw recently removed from the sequence of rotating mold jaws is arranged in the waiting position. In particular, in order to be able to combine a two-axis robot arrangement with a changing device that can be displaced parallel to the movement of the sequence of rotating mold jaws, it can be advantageous to move the changing device back to a starting position after a changing process, so that a waiting position accessed by the provision device is always arranged at the same position of the corrugator.

Furthermore, the changing device can comprise at least two, in particular exactly two, waiting positions and the supply device can be set up to optionally remove mold jaws from each of the two waiting positions. It should be mentioned at this point that, as far as applicable, the above text passages, which refer to "the / a waiting position "refer to each of the waiting positions of a respective changing device.

In particular, the changing device can comprise a linearly operable sliding device which is set up to push a molding jaw to be removed from the sequence of rotating mold jaws in a direction essentially parallel to a plane of rotation of this sequence of molding jaws or into this sequence. Thus, the changing device can comprise a sliding device which has two compartments, each of which can accommodate a mold jaw. These two compartments can each be traversed by the sequence of revolving mold jaws as if they form a section of the above-mentioned channel in which the sequence of revolving mold jaws is displaced. As a result, the two compartments can be designed to be open on opposite sides in the feed direction of the sequence of circumferential mold jaws, in order to allow entry / exit of mold jaws. In the case of two waiting positions of the changing device, the sliding device can comprise three partition walls which extend essentially in the width direction of the changing device and which define the two compartments. Thus, when the changing device is not actuated, one of the compartments can always be in a pass-through position in which it is passed through by the sequence of rotating mold jaws. In this state, the correspondingly other compartment forms a first waiting position at which a molding jaw can be removed from the compartment or can be made available in the compartment. If the changing device is actuated, the compartment located in the first waiting position moves into the flow position and the compartment located in the flow position prior to actuation moves to a second waiting position at which the mold jaw located in this compartment can again be exchanged. With a changing device designed in this way, the feed direction of the sequence of rotating mold jaws runs essentially perpendicular to an actuation direction of the changing device and parallel to the plane which is defined by the sequence of rotating molding jaws.

Furthermore, the corrugator can comprise a plurality of changing devices, in particular three or four changing devices. In this way, it is possible, during a single revolution of the sequence of rotating mold jaws on the corrugator, to exchange a respective entire sequence of rotating molding jaws for another entire sequence of rotating molding jaws which has a different sequence / configuration of molding surfaces.

Each sequence of mold jaws rotating on the corrugator can be assigned at least one separate supply device and at least one separate changing device. In conventional corrugators, in which two sequences of mold jaws rotate with opposite directions of rotation, one or more supply devices and one or more changing devices can be arranged on each return of the mold jaws. In comparison to the fact that a provision device has to serve both returns of the sequences of rotating mold jaws, this can enable a less complex provision device and / or a faster change of mold jaws.

In particular, the plurality of mold jaws, which are arranged outside the series of mold jaws circulating on the corrugator, can comprise at least the same number of mold jaws as the number of mold jaws of the corrugator circulating series or series to which the plurality of mold jaws is assigned. In this way, all of the mold jaws that are currently contained in a sequence of circumferential mold jaws can be completely exchanged for mold jaws that are still arranged in a corresponding storage device at this point in time. It is thus possible that a wide variety of tubes can be produced in a seamless transition on the corrugator. In this way, set-up times can be shortened and manufacturing costs can be reduced.

• 1 eine Aufsicht auf einen teilweise freigestellten Corrugator gemäß der vorliegenden Erfindung;
• 2 eine Wechseleinrichtung des erfindungsgemäßen Corrugators in einer ersten Stellung; und
• 3 die Wechseleinrichtung aus 2 in einer zweiten Stellung.

The present invention will be described in greater detail below using an exemplary embodiment with reference to the accompanying drawings. It shows:

• 1 a plan view of a partially exposed corrugator according to the present invention;
• 2 a changing device of the corrugator according to the invention in a first position; and
• 3 the changing device 2 in a second position.

In 1 is a corrugator according to the invention generally with the reference number 10 designated. The corrugator 10 has a first half I and a second half II, which are adjacent to one another along a center plane A. On each of halves I and II of the corrugator 10 is a sequence of mold jaws (not shown) arranged along the arrows U on the corresponding half I, II of the corrugator 10 circulate. In an area in which mold jaws of the two halves I, II of the corrugator 10 are displaced along plane A, the mold jaws lie against each other in pairs, so that along the plane A a tube defined by the molding surfaces of the mold jaws can be formed. At the end of the pipe formation area, the mold jaws are moved away from each other and a respective return 12 , 14th fed, at the end of which the mold jaws are shifted towards one another again in order to rest against one another along plane A. Since here the two sequences of molding jaws of halves I and II of the corrugator 10 comprise an equal number of mold jaws, which on both halves I and II of the corrugator 10 are propelled at the same speeds, hit after a complete revolution along the arrows U Again the same mold jaws on top of each other in order to lie against each other in pairs and consequently to form the same pipe section.

It can therefore be seen that a through the corrugator 10 endlessly produced tube is repeated periodically at the latest after one complete cycle of the two series of mold jaws. To during continuous operation of the corrugator 10 In order to be able to produce pipes of different lengths with different designs in a completely flexible manner, it is necessary to remove mold jaws from the series of mold jaws and to replace them with mold jaws of different design.

For this purpose is on the corrugator according to the invention 10 on every return 12 , 14th a changing facility 16 , 18th arranged through which a respective sequence of mold jaws is displaced.

Referring now to 2 is the changing facility 16 half I of the corrugator 10 shown in detail, it should be noted at this point that the changing device 16 and the changing facility 18th are designed identically, so that an analogous description of the changing device 18th is omitted.

The changing facility 16 includes a pusher 20th , which with a drive 22nd is connected such that the sliding device 20th between the in 2 position shown and the in 3 position shown can be shifted. The drive 22nd can for example be designed as a pneumatically operated piston-cylinder arrangement or as an electric drive with a linear axis or spindle drive. On the sliding device 20th the changing facility 16 are three partitions 24 arranged substantially along a width direction B. the changing facility 16 or parallel to a feed direction U of the changing facility 16 continuous sequence of mold jaws run. The three partitions 24 define on the sliding device 20th a first subject 26th and a second compartment 28 . The first subject 26th is located in the in 2 position shown in a passage position DP through which the corresponding sequence of mold jaws runs without the sequence of mold jaws being impaired. The second subject 28 is located in the in 2 position of the sliding device shown 20th in a first waiting position WP1 .

With reference back to 1 can be seen that the subjects 26th and 28 on their upper side, that is, in 1 one side above the leaf level, are open. So can one in the second subject 28 the sliding device 20th arranged mold jaws, which are in 1 in the first waiting position WP1 from a provisioning facility 30th , which in the in 1 illustrated embodiment as a robot assembly 30th with a gripper 32 is designed to be detected and to a storage position SP one of half I of the corrugator 10 or the storage device assigned to the sequence of rotating mold jaws arranged thereon 34 be relocated. From the memory location SP the mold jaw can then have a plurality of mold jaws 36 which are outside of the corrugator 10 is arranged circumferential sequences of mold jaws. The expression “outside of the corrugator 10” is intended to mean in this context that the corresponding plurality of mold jaws 36 not in one of the arrows U each spanned area or also an area arranged perpendicular to the plane of the sheet above or below it. Of course, half II of the corrugator can 10 an analog provision device and storage device can be assigned, in this regard referring to the descriptions for half I of the corrugator for reasons of clarity 10 referenced.

Then the memory location SP a new molding jaw from the plurality from outside the corrugator 10 arranged mold jaws 36 are supplied, which from the supply device 30th from there to the waiting position WP1 is transported.

Should a predetermined molding jaw from the sequence of at half I of the corrugator 10 surrounding mold jaws against the one at the waiting position WP1 provided mold jaws are exchanged, the changing device changes 16 at the moment in which the predetermined molding jaws completely in the first compartment 26th occurred from the in 2 position shown in 3 position shown. The one in the first compartment 26th arranged predetermined mold jaws is, as in 3 shown, to a second waiting position WP2 has been relocated, whereas that in the second compartment 28 provided mold jaws in the throughput position DP has been relocated so that it has been inserted in place of the removed mold jaw as part of the sequence of revolving mold jaws.

The deployment facility 30th can now move the mold from the second waiting position WP2 remove this from the memory location SP feed, from there then remove a new molding jaw and this at the second waiting position WP2 ready for another change process.

The drive is advantageous 22nd designed or controlled in such a way that as soon as a mold jaw to be exchanged is in the through-flow position DP the sliding device 20th the changing facility 16 entry (in 2 shown dotted), the sliding device 20th is shifted with a first force or a first pressure p1 against the sequence of rotating mold jaws in the opposite direction (that is, either from the in 2 position shown in 3 position shown or vice versa). Is the mold jaw to be exchanged completely in the through position DP arranged first compartment 26th occurred (in 3 shown dotted), then the sliding device 20th with a second force or a second pressure p2, which (r) is greater than the first force or the first pressure p1, shifted in the alternating direction, so that in the second compartment 28 arranged (in 3 dashed lines) mold jaws at the passage position DP the sequence of mold jaws, which follow the arrows U circulate, is supplied.

Claims (15)

Corrugator (10) for producing pipes, in particular corrugated pipes, comprising at least two sequences of revolving mold jaws each having at least one shaping surface, two mold jaws bearing against one another in a predetermined area (A) of the corrugator (10) in such a way that their shaping surfaces form a shape for forming a tube, at least one changing device (16, 18) which is set up to exchange a mold jaw of the corresponding sequence of mold jaws for a mold jaw provided at a waiting position (WP1, WP2) assigned to the changing device (16, 18), wherein the changing device (16, 18) is further set up to change the mold jaw while the sequence of mold jaws is being advanced on the corrugator (10), and wherein the corrugator (10) further comprises a provision device (30) which is set up to remove a predetermined mold jaw from a plurality of mold jaws (36) which is arranged outside of the series of mold jaws surrounding the corrugator (10) and to provide the waiting position (WP1, WP2) of the changing device (16, 18) and / or remove one of the mold jaws present at the waiting position (WP1, WP2) and these mold jaws from the plurality of mold jaws arranged outside the series of mold jaws that run around the corrugator (10) (36) to be fed. Corrugator (10) Claim 1 , characterized in that the majority of the mold jaws (36) arranged outside the series of mold jaws surrounding the corrugator (10) are arranged in an area which, in particular, is completely outside a section of the corrugator (10) which is defined by the series of peripheral mold jaws and / or lies outside a section of the corrugator (10) which is arranged above and / or below the section defined by the sequence of rotating mold jaws in a direction perpendicular to a plane of rotation of a series of mold jaws. Corrugator (10) Claim 1 or 2 , characterized in that the supply device (30) is set up to feed one of the mold jaws removed from the waiting position (WP1, WP2) to a storage position (SP), which of the plurality of mold jaws arranged outside the series of mold jaws (10) surrounding the corrugator (10). 36) is assigned. Corrugator (10) Claim 3 , characterized in that the storage position (SP) is an individual storage position (SP) for a respective type of mold jaw or for each mold jaw in a storage device (34). Corrugator (10) Claim 3 , characterized in that the storage position (SP) has one for all mold jaws, which are taken from the waiting position (WP1, WP2) by the supply device (30) and the plurality of mold jaws (36) arranged outside the series of mold jaws that circulate on the corrugator (10) ) are supplied, the same position of a storage device (34). Corrugator (10) Claim 5 , characterized in that the storage position (SP) is assigned a transport device which is set up to transport a molding jaw provided by the supply device (30) at the storage position (SP) away from the storage position (SP) and / or a molding jaw to transport the plurality of mold jaws (36) arranged outside of the series of mold jaws surrounding the corrugator (10) to the storage position (SP), so that these mold jaws of can be taken from the supply device (30). Corrugator (10) according to one of the preceding claims, optionally according to Claim 3 , characterized in that the provision device (30) comprises at least one robot arrangement (30, 32) which is set up to grasp at least one mold jaw and between the waiting position (WP1, WP2) and the plurality of outside the corrugator (10) circumferential sequences of mold jaws arranged mold jaws (36), in particular the storage position (SP). Corrugator (10) Claim 7 , characterized in that the robot arrangement (30, 32) is set up to be displaceable along precisely two axes, in particular along two mutually perpendicular axes. Corrugator (10) according to one of the preceding claims, characterized in that the changing device (16, 18) is further set up to move during the changing process of the mold jaws parallel, and in particular at a substantially identical speed, to the displacement (U) of the To move a sequence of rotating mold jaws in the area of the changing device (16, 18). Corrugator (10) Claim 9 , characterized in that the changing device (16, 18) is further set up to return to a starting position immediately before changing the mold jaws after changing the mold jaws, so that the mold jaw recently removed from the sequence of rotating mold jaws is at the waiting position (WP1 , WP2) is arranged. Corrugator (10) according to any one of the preceding claims, characterized in that the changing device (16, 18) comprises at least two, in particular exactly two, waiting positions (WP1, WP2) and that the provision device (30) is set up to optionally mold jaws from each of the two waiting positions (WP1, WP2). Corrugator (10) Claim 11 , characterized in that the changing device (16, 18) comprises a linearly operable sliding device (20) which is set up to remove a mold jaw to be removed from the sequence of circumferential mold jaws in a direction substantially parallel to a plane of rotation of this sequence of mold jaws ( p1, p2) out or into this sequence. Corrugator (10) according to one of the preceding claims, characterized in that the corrugator (10) comprises a plurality of changing devices (16, 18), in particular three or four changing devices (16, 18). Corrugator (10) according to one of the preceding claims, characterized in that at least one separate supply device (30) and at least one separate changing device (16, 18) is assigned to each sequence of mold jaws rotating on the corrugator (10). Corrugator (10) according to one of the preceding claims, characterized in that the plurality of mold jaws, which are arranged outside the series of mold jaws (36) surrounding the corrugator (10), comprises at least an equal number of mold jaws as the number of mold jaws on the corrugator (10) revolving sequence or sequences to which the plurality of mold jaws is assigned.

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