DE102007038404A1 - Corrugator for producing pipes with a cross-profiled pipe wall with mold jaws of different lengths - Google Patents

Abstract

Described is a corrugator for producing pipes with a cross-profiled pipe wall with mold jaws 101 to 110, which are moved along at least two orbits. The orbits are formed to have a working portion 135 and a return portion, respectively. In their working section 135, the orbits guide the mold jaws 101 to 110 to form a common mold channel. In each of the return sections, a return of the forming jaws 101 to 110 controlled via a return device takes place. It is essential that at least two forming jaws arranged in succession in an orbit have different lengths. For controlling the mold jaw drive, a detection device 141, 142 is provided for detecting an actual state of the guided in the orbits form jaws 101 to 110. The control takes place via an electronic control device.

Description

These The invention relates to a method for producing pipes with a transversely profiled tube wall.

Devices for the continuous production of plastic pipes with Querprofilierter wall have long been known. Such called Korrugator device is z. B. in the patent US 2,866,230 described, are guided in the molding jaws without spacing successively in orbits.

As a further development, the shuttle corrugator can be seen, in which the forming jaws are transported in a return section of the orbit at a higher speed than in an operating section of the orbit. This makes it possible to reduce the number of mold jaws required for continuous operation of the corrugator. Such a shuttle Korrugator is z. B. in the patent EP 0 270 694 B1 described.

Of the Until now corrugators have been operated with the same shape jaws Length. The length of a mold jaw is as the along the transport direction in the working section measured linear expansion the Formbacke, between front and rear end, defined. When using so-called socket form jaws for forming pipe sockets at the ends of a pipe they have the same length like the normal mold jaws for forming the profiled standard wall between the ends of the tube. Depending on the length ratios the sleeve areas of a pipe to the total length of the pipe This can be an undesirable blend in the final production lead the pipe. In the usual in pipe production Production volumes can thus considerable material and so value losses are connected.

Of the The invention is based on the object of providing a corrugator, which can be operated with mold jaws of different lengths.

These The object is achieved by a corrugator according to claim 1.

The particular advantages of the invention are that form jaws of different lengths are used can and still be a continuous operation of the corrugator possible is.

Especially For example, the length of the socket forming jaws can be selected according to the desired socket length can be chosen. This can be achieved that when cutting the pipe sections from that in the corrugator produced endless tube no or at least less waste is obtained.

Furthermore results in the production of shorter mold jaws a Material and labor savings. The shorter mold jaws can be used in the actual needed Length can be made without sticking to the length to orientate the "normal" mold baking. The saved material inevitably results lighter mold jaws, which also saves energy during transport the mold jaws and during operation of the corrugator means.

Further advantageous embodiments are in the subclaims described. It can be provided that the detection device the actual state of the forming jaws at the beginning of the working section or at the end of the work phase or at the beginning as well as the Recorded at the end of the work period. It can be provided that the detection device the actual state of the mold jaws in the return section detected.

In A preferred embodiment of the invention is the detection device at the beginning of the work section or at the end of the work section or arranged both at the beginning and at the end of the working section. It can be provided that the detection device in the return section is arranged.

Preferably the detection device has a sensor and / or switch device on. This sensor and / or switch device can be the actual state a mold baking with contact (switch) or without contact (non-contact) to capture the form of baking. The sensor and / or switch device can be on an electric and / or electro-magnetic and / or pneumatic and / or mechanical and / or optical and / or thermal detection method based.

Further can be provided that the sensor and / or switch device has a positive control. Thus it is possible that the Sensor and / or switch device upon reaching a certain Actual value automatically causes a given control sequence.

It can be provided that the axial position and / or the angular position and / or the speed and / or the passage of time of the shaping jaws in the return section and / or in the working section is detected as the actual state of the forming jaws. The detection of the axial position of the mold jaws comprises z. Example, the detection of a relative or absolute position of the mold jaws with respect to an axis of the working section and / or the return section. For example, to detect the axial position of the mold Baking the relative position of the mold jaws between the beginning of the working section (= relative position 0) and the end of the working section (= relative position 1) detected. The detection of the angular position of the mold jaws comprises z. B. detecting an angle (eg azimuth) between the position of a mold jaw and any given direction in the plane defined by the working section and the return section, at the location of the detection device. The detection of the speed of the mold jaws comprises z. Example, the detection of the change of an axial position as a function of time (web speed) or the change of an angular position as a function of time (angular velocity). The detection of the time course of the mold jaws comprises z. As the detection of axial positions / angular positions and / or speeds at several consecutive times. The time course allows a statement or extrapolation to a position or speed of a mold baking at a given time. It is also possible that the length of a mold jaw is detected as the actual state of the mold jaws.

For example detects a sensor device a socket forming jaw by means of a on the sleeve forming jaw arranged magnets. For this purpose, the sensor device a magnetic sensor responsive to a change in the magnetic field governed. Place a socket forming jaw in the release area of the sensor, the sensor detects z. B. a change the magnetic field strength and signals a control device, that a socket forming jaw is located at the location of the sensor.

Preferably is the actual state of the mold jaws, the axial position and / or the angular position and / or the speed and / or the time course the forming jaws at the end and / or at the beginning of the working section detected.

It can be further provided that the detection device such is formed that on the detection of the actual state the time is reached at which one or more of the mold jaws at End of the work section and / or at the beginning of the work section are arranged. As already described above, it is possible that the detection device detects the time course of the mold jaws. This may make it possible to position or speed to determine a shape baking at a given time. Especially This may make it possible to determine the time on which a mold baking at the end of the work section or at the beginning of the work section is positioned.

Preferably serves the time at which one or more of the jaws at the end of the working section and / or arranged at the beginning of the work section are, the feedback device as reference time for the control of the return. For example may at the time when one or more dies on the End of the work section, the return triggered this molding jaws on the feedback device / started becomes. It is also possible that at the time at which one or more mold jaws reach the beginning of the work section, the return of these mold jaws on the return device ends.

It is possible at the time when one or more the mold jaws are arranged at the end of the working section, a Disengaging the mold jaws with respect to the working section and / or an engagement with respect to the return section he follows. It is also possible that at the time one or more of the mold jaws at the beginning of the work section are arranged, an engagement of the mold jaws with respect of the working section and / or disengaging with respect to the Return section. Engaging a Forming with respect to the working section is preferably carried out by the molding jaws by means of a coupling to the common molding channel is appended. The engagement of a mold baking with respect the return section is preferably by a driver of the conveyor in a recess engages the mold baking.

In A preferred embodiment of the invention is in the return section arranged a transfer and / or parking facility. The Park device serves to temporarily store a form baking return to the work section at a later date use. The transfer device serves a Form baking from the return section in the To transport the parking facility and / or remove it from the parking facility to transport the return section. It is also possible that a arranged in the parking facility Form baking to the outside, d. H. outside the corrugator, is removed and / or a form baking from the outside in the Parking device is transported, preferably by means of the transfer device. A Such (exchange) action can z. B. after damage Forming baking will be necessary if the operation of the corrugator should not be interrupted.

It can be provided that the transfer and / or parking device is arranged within the return section. In this way, the return section is divided into two sections. In this case, the one return partial section which extends from the end of the working section to the transfer and / or parking device may be referred to as the first return partial section. In addition, the other return partial section, which extends from the transfer and / or parking device to the beginning of the working section, may be referred to as the second return partial section.

In A preferred embodiment of the invention comprises the return section a first and a second transverse conveyor and a longitudinal conveyor. Transported the first cross conveyor the forming jaws from the end of Working section (= beginning of the first cross conveyor) across, z. B. at right angles to the transport direction of the mold jaws in Working section to the beginning of the longitudinal conveyor (= End of the first cross conveyor). The longitudinal conveyor connects to the first cross conveyor and transports the mold jaws opposite to the transport direction the forming jaws in the working section from the end of the first cross conveyor (= Beginning of the longitudinal conveyor) to the beginning the second cross conveyor (= end of the longitudinal conveyor). The second transverse conveyor closes to the longitudinal conveyor and transported the mold jaws transversely, z. B. at right angles to the transport direction of the Form baking in the working section to the beginning of the working section (= End of the second cross conveyor). In this way results in an uninterrupted conveyor for Return transport of forming jaws from the end of the working section to the beginning of the work section.

It it is possible that the first cross conveyor, the second cross conveyor and the longitudinal conveyor depending on the detected actual state of the mold jaws their Function, d. H. the return of a mold baking, begin and / or end. The detected actual state can be any Being actual state, preferably it is an axial position of the mold jaws. For example, the first cross conveyor may transport then start a form baking from the end of the working section, when the detection means signals that the mold is baking at the end of the work section. It is also possible, that one of said conveyors depends on the detected actual state of the mold jaws the conveying speed, transported with a mold baking in the conveyor is set to a predetermined value. For example, a conveyor from a first conveying speed to a second Conveying speed greater than the first conveying speed is, change when the Detection device signals that a mold baking in a waiting position for transport by the conveyor located.

It can further be provided that at the beginning of the first cross conveyor and / or at the beginning of the second cross conveyor or on End of the longitudinal conveyor a stop device is arranged with a stop for the mold jaws. Preferably corresponds to the position of a mold baking at the end of the longitudinal conveyor the position of a mold baking at the beginning of the second cross conveyor. The stop device is preferably designed so that they the stop depending on the detected actual state of Positioning jaws positioned.

It is z. B. possible that the stop device at the beginning the transverse conveyor the stop of the stop device positioned in a first position when in the longitudinal conveyor a mold baking is transported with a first length, and that the stop means at the beginning of the cross conveyor the stop of the stop device in a second position positioned when in the longitudinal conveyor a mold baking with a second length is transported. Preferably, the concerns of the end facing the stop the mold baking on the stop facing away from the stop end face the jaw always in the same plane. In other words, the Position of the stopper is so customizable that when concerns the form jaw on the stop facing away from the stop end face of the mold jaw lies in a defined plane. In this way, z. B. ensured be that the second cross conveyor the mold jaw regardless of the length of the mold jaw always in a defined position and in a defined way and way to transport.

Preferably The length of each mold jaw corresponds to an integer Multiple N of a basic length. Because the length of a Formbacke be not less than zero length units can, is the integer multiple N the set of all positive, meant integers other than zero. To operate the corrugator existing facilities, in particular connections for cooling the form of baking, are tuned to this basic length. For example this basic length is 6 inches, the length a normal mold jaw for forming the pipe wall outside of a sleeve section four times the basic length (= 24 inches), the length of a socket-forming jaw for training the pipe wall within a sleeve section threefold the basic length (= 18 inches), and the water connections at the top of the sleeves are in a grid of two times (= 12 inches) of the basic length arranged.

In a preferred embodiment of the invention, each of the forming jaws on its underside on an elongated recess into which a along the orbit arranged driver for proof engages the shaping of the mold. This movement takes place at least along a portion of the orbit. Carrier is understood to mean an article or a part of an article which is able to take along a shaping jaw along the orbit. For example, this is a plastic cuboid corresponding to the groove, which is attached to a revolving chain or a metal block corresponding to the groove whose position by means of two mutually perpendicular threaded spindles both transverse or parallel to the transport direction of the mold jaws and in the vertical direction can be changed to engage or gripping in the groove of the mold jaws. Alternatively, it is also possible that the corrugator has a gripper, which holds a mold jaw for moving the mold jaw at least along a portion of the orbit in engagement. Such a gripper may have two holding jaws, which bear firmly against both end faces of a forming jaw and thus enable transport of the forming jaw both transversely and parallel to the transport direction of the forming jaws in the working section.

It can also be provided that the detection device is a guide rail along which guided in the working section form jaws slide. The guide rail allows the in the working section located mold jaws only one movement parallel to the transport direction the forming jaws in the working section, as long as a defined actual state the mold is not reached. This defined actual state is not reached in particular, as long as the mold jaws along of the working section slide along the guide rail. The defined actual state is reached as soon as the mold jaws enter End of the guide rail in the area of the end of the work section have happened. When the defined actual state is reached, lie the mold jaws no longer on the guide rail and a movement of the mold jaws transversely to the transport direction of the mold jaws in the working section is possible. From this point on, the first transverse conveyor the forming jaws transversely to the transport direction to transport the molding jaws in the working section.

Preferably the control of the corrugator takes place, in particular the control the return of the mold jaws from the end of the work section back to the beginning of the work section and / or the entry and ejection of mold jaws in the parking facility or off the parking facility, by means of a control on the control elements based. The controller is preferably as an electronic controller educated. A control element defines the action of a transport device, z. B. on a revolving chains or a threaded spindle guided driver, to promote a form of baking. The control determines when and how long moves the transport device into engagement with a shaping jaw, at what time and how long the transport device without moving a mold jaw (eg to return to a home position), and when and how long the transport device does not move, d. H. has a break phase.

controls are respectively the first cross conveyor, the second Cross conveyor, the longitudinal conveyor and the parking facility assigned. A control element, the one assigned to these facilities, has one for the jweilige Setup specific division with three phases. A first phase represents a movement of a transport device the respective device with a mold jaw. A second phase represents a movement of a transport device of the respective device without a form jaw. A third phase represents one Pause a transport facility of each institution.

It is an advantage if the controller is designed to work with a circulation of the same length mold jaws, the control elements all are the same in time and in a round of different long mold jaws different in time control elements are included. In other words, the existence of different lengths Mold baking is reflected in a different length of time the controls again. It is possible that short mold jaws a temporally shortened control element assigned. Long mold baking can either be a long time (Default) control or a time-shortened Be assigned control element. It is possible that the temporal shortening of the controls approximately proportional to the length shortening of the mold jaws is.

In A preferred embodiment of the invention is the temporal Shortening of the control elements compared to the uncontrolled control elements realized by that the third phase (break) is shortened in time, however the length of time of the first phase (movement with form jaw) and the second phase (motion without mold jaw) the unmodified control elements unchanged remains. The break proportion is thus variable, while the first and second phase for the respective transport facility keep specific length unchanged. The Compensation of length shortening of a control element always takes place only over the length of the third Phase (break percentage).

It is particularly preferred that a control element of the first cross conveyor, the second transverse conveyor or the longitudinal conveyor consists of exactly three immediately adjacent time intervals. Each of the three time intervals is assigned to one of the three phases. So z. B. a control element of the second cross conveyor the time sequence: first phase, second phase, third phase on. A control element of the first transverse conveyor or the longitudinal conveyor has z. For example, the time sequence: second phase, first phase, third phase on.

The Control elements of the parking facility have a different one System. The parking facility has a fourth phase, which is a shutdown represents the parking facility. A control element the parking facility has z. B. only a single time interval of fourth phase. Alternatively, a control element of the parking facility three time intervals with the following time sequence: third Phase, first phase, third phase.

It can also be provided that the last time interval of a Control element is always associated with the third phase, d. H. that the break is always at the end of a control cycle. The chronological order (Time sequence) of the first and second phase may be in the control elements the second cross conveyor reverse to the order in the control elements of the first cross conveyor and the longitudinal conveyor.

In A particularly preferred embodiment of the invention is the Transport of the mold jaws in the working section to the requirements adapted to the corrugation process. For example, the feed takes place in the working section (main drive) with a gear coming in one arranged on the bottom of the mold jaws rack engages. The rotational speed of the gear is not constant, but changes depending on whether a sleeve section (lower Material requirements in the corrugation process -> fast feed rate) or a standard corrugated pipe section (high material requirement in the corrugation process -> slow feed) is extruded. The control of the return section becomes adapted to the transport of the forming jaws in the working section. The Master axis (= work section) specifies the master frequency, at the slave axes (= return section) to adjust.

in the The following is the invention with reference to several embodiments with the aid of the attached drawings by way of example. Show it:

1 a schematic representation of a corrugator according to the invention as an overview drawing;

2a -K is a schematic representation of a sequence of operating states of a corrugator according to the invention, showing only the right half of the corrugator;

3a -F a basic sequence control of a corrugator according to the invention.

1 shows a plan view of a corrugator 1 with two with respect to an axis of symmetry 120 symmetrical halves. For simplicity, only one, seen in the direction of the right half of the corrugator 1 described. All features described below exist in an analogous, symmetrically arranged manner also in the left half of the corrugator 1 , The corrugator 1 has a first cross conveyor 131 , a longitudinal conveyor 132 , a second cross conveyor 134 , as well as a working section 135 on. In the illustration in 1 are in the working section 135 six normal mold baking 101 - 106 , another normal shape jaw 107 located at the end of the first cross conveyor 131 , another normal shape jaw 108 located at the end of the longitudinal conveyor 132 , and two socket forming jaws, which are shorter in length than the normal forming jaws, are located in a parking facility 170 the corrugator 1 ,

The first cross conveyor 131 transports mold jaws out of the working section 135 transverse to the transport direction of the mold jaws in the working section 135 to the beginning of the longitudinal conveyor 132 , The first cross conveyor 131 has a stop 151 on, which can be arranged in different positions. When the first cross conveyor 131 a mold jaw to the beginning of the longitudinal conveyor 132 has transported, this form jaw can either in the parking facility 170 be engaged or over the longitudinal conveyor 132 to the beginning of the second cross conveyor 134 be transported.

The first cross conveyor 131 and the second cross conveyor 134 have two drivers for transporting the mold jaws. The drivers can be moved by means of threaded spindles both horizontally and vertically.

The drivers engage in a groove arranged on the underside of the mold jaws 167 one. In the in 1 shown position of the mold jaw 108 the drivers are under the groove 167 the form jaw 108 drove and then moved upwards in a vertical direction until it was in the groove 167 intervention. In this position, the drivers are horizontal towards the working section 135 postponed. This will make the jaw 108 from the position at the end of the longitudinal conveyor 132 to the beginning of the work section 135 transported. Has the forming jaw 108 this position at the beginning of the working section 135 reached, the drivers are driven by the vertical threaded spindle down and out of the groove 167 the form jaw 108 moved out and moved back horizontally to the starting position.

The longitudinal conveyor 132 has a guided over two pulleys chain, are attached to the two drivers for transporting the mold jaws. For transporting the mold jaws in the longitudinal conveyor 132 includes the longitudinal conveyor 132 a driver 133 , which at a front side of the form-jaw 107 abuts and the jaw 107 pushing in front of him. So that the mold jaw 107 during transport over the longitudinal conveyor 132 not tilted, has the longitudinal conveyor 132 a guide rail 153 on, over which the groove 167 the form jaw 107 slides. 1 shows the form jaw 108 at the end of the longitudinal conveyor 132 , The longitudinal conveyor 132 has the mold jaw 108 transported as far as the mold jaw 108 on an adjustable stop 152 is applied. From this position, the mold jaw 108 over the second cross conveyor 134 to the beginning of the work section 135 transported.

The one orbit of the corrugator 1 , which pass through the mold jaws, seen from above, in a clockwise direction, thus consists of the working section 135 , the first cross conveyor 131 , the longitudinal conveyor 132 and the second cross conveyor 134 ,

The parking facility 170 has three parking spaces 173 on that around a vertical axis 171 clockwise 172 are rotatably mounted. In these parking lots 173 Unnecessary mold jaws may be stored temporarily at a later time of use in the corrugator 1 to be fed again.

In a first embodiment of the invention exist on two of the parking lots 173 the park facility 170 sensors 141 . 142 , which detect an actual state of the molded jaws parked there. In another embodiment of the invention are at the end of the working section 135 a first sensor 143 and / or at the beginning of the work section 135 a second sensor 144 arranged. It is particularly advantageous if the two socket form jaws 109 and 110 each carry a magnet on its top, passing through the sensors 141 . 142 in the park facility 170 can be recognized. The in the working section 135 arranged sensors 143 . 144 measure z. As the duration of a mold jaw for a complete passage of the sensor 143 . 144 needed, and conclude on the length and thus the type of form jaw.

The 2a to 2k show the circulation of mold jaws in a corrugator according to the invention 2 of which, for simplicity, only the one half seen in the working direction is shown. Such a circulation consists of several steps, which are cycled. The sequence of 2a to 2k Gives the position of the jaws at the beginning of successive steps.

2a gives the basic position of the corrugator 2 again: two socket-shaped jaws 209 . 210 are in the park facility 270 , eight normal mold baking 201 to 208 are in circulation in orbit 231 . 232 . 234 . 235 , At the time shown are the normal mold jaws 201 to 206 in the working section 235 arranged. A normal shape jaw 207 located at the end of the first cross conveyor 231 , a normal shape jaw 208 is located at the beginning of the second cross conveyor 234 , The at the first cross conveyor 231 arranged stop 251 is in a first position 251a that are on the length of the normal-form-baking 201 to 208 is tuned; as well is the stop 252 in a first position 252a , which is also on the length of the normal-form-baking 201 to 208 is tuned. In the park facility 270 are the two socket form jaws 209 . 210 which is only three-quarters of the length of a normal-shape jaw 201 to 208 exhibit.

The The following descriptions of the individual steps make reference to the previous step, d. H. it is described which actions or changes since the previous step have occurred.

2 B shows the second step of the cycle. The form jaw 208 was at the beginning of the work section 235 promoted. By turning a turntable of the parking facility 270 became the socket form jaw 209 at the beginning of the longitudinal conveyor 232 rotated and the end of the longitudinal conveyor 232 transported. There lies the socket-shaped jaw 209 at the stop 252 An in a position 252b has been moved to the shorter length of the socket form jaw 209 is adjusted. The normal shape jaw 207 was due to the rotation of the turntable of the parking facility 270 in the park facility 270 indented and the normal shape jaw 206 from the end of the work section 235 to the end of the first cross conveyor 231 transported.

2c returns the third step of the cycle. The socket form jaw 209 was at the beginning of the work section 235 engaged by rotation of the turntable of the parking facility 270 became the second socket form jaw 210 to the Be Start the longitudinal conveyor 232 brought and over the longitudinal conveyor 232 to the end of the longitudinal conveyor 232 transported where they stop at the stop 252 in the changed position 252b , which on the short sleeve form baking 209 . 210 adapted, is present. At the same time, the normal shape jaw 205 from the end of the work section 235 to the end of the first cross conveyor 231 transported and by the rotation of the turntable of the parking facility 270 the normal shape jaw 206 in the park facility 270 indented.

2d returns the fourth step of the cycle. The second sleeve form jaw 210 was at the beginning of the work section 235 indented. Thus, the two socket form jaws are 209 and 210 one after the other in the working section 235 for the formation of a pipe sleeve. The normal shape jaw 205 was over the longitudinal conveyor 232 to the end of the longitudinal conveyor 232 transported where they stop at the stop 252 in the original position adjusted to the length of the normal forming jaws 252a is applied. At the same time, the socket-shaped jaw was 204 from the end of the work section 235 to the end of the first cross conveyor 231 transported. The two normal shape jaws 206 and 207 sit unchanged in the park facility 270 ,

2e returns the fifth step of the cycle. The normal shape jaw 204 was over the longitudinal conveyor 232 to the end of the longitudinal conveyor 232 transported where they stop at the stop 252 in the original position 252a is applied. The normal shape jaw 205 was from the end of the longitudinal conveyor 232 into the working section 235 transported. The normal shape jaw 203 was from the end of the work section 235 to the end of the first cross conveyor 231 transported. The normal mold baking 206 and 207 sit unchanged in the park facility 270 , The two socket-shaped jaws 209 and 210 were about the length of a normal shape jaw 201 to 208 in the working section 235 in working direction (= in 2e to the left) crazy.

2f returns the sixth step of the cycle. The normal shape jaw 204 was from the end of the longitudinal conveyor 232 to the beginning of the work section 235 transported. The normal shape jaw 203 was over the longitudinal conveyor 232 to the end of the longitudinal conveyor 232 transported where they stop at the stop 252 in the original position 252a is applied. The normal shape jaw 202 was from the end of the work section 235 to the end of the first cross conveyor 231 transported. The normal mold baking 206 and 207 sit unchanged in the park facility 270 , The two socket-shaped jaws 209 and 210 in the working section 235 were a position, ie the length of a normal-form jaw 201 to 208 , shifted in working direction.

2g returns to the seventh step of the cycle. The normal shape jaw 203 was from the end of the longitudinal conveyor 232 to the beginning of the work section 235 transported. The normal shape jaw 202 was over the longitudinal conveyor 232 to the end of the longitudinal conveyor 232 transported where they stop at the stop 252 in the original position 252a is applied. The normal shape jaw 201 was from the end of the work section 235 to the end of the first cross conveyor 231 transported. The normal mold baking 206 and 207 sit unchanged in the park facility 270 , The two socket-shaped jaws 209 and 210 in the working section 235 were a position, ie the length of a normal-form jaw 201 to 208 , shifted in working direction.

2h returns to the eighth step of the cycle. The normal shape jaw 202 was from the end of the longitudinal conveyor 232 to the beginning of the work section 235 transported. The normal shape jaw 201 was over the longitudinal conveyor 232 to the end of the longitudinal conveyor 232 transported where they stop at the stop 252 in the original position 252a is applied. The normal shape jaw 208 was from the end of the work section 235 to the end of the first cross conveyor 231 transported. The normal mold baking 206 and 207 sit unchanged in the park facility 270 , The two socket-shaped jaws 209 and 210 in the working section 235 were a position, ie the length of a normal-form jaw 201 to 208 , shifted in working direction.

2i returns the ninth step of the cycle. The stop 251 at the first cross conveyor 231 was in the changed position 251b shifted to the lesser length of the socket form jaw 209 Take into account. About the first cross conveyor 231 became the socket form jaw 209 from the end of the work section 235 to the end of the first cross conveyor 231 postponed. The normal shape jaw 201 was from the end of the longitudinal conveyor 232 to the beginning of the work section 235 postponed. The normal shape jaw 208 was over the longitudinal conveyor 232 to the end of the longitudinal conveyor 232 moved to where they stop 252 in the original position 252a is applied. The normal mold baking 206 and 207 are still unchanged in the park facility 270 ,

2y returns the tenth step of the cycle. The normal shape jaw 208 was from the end of the longitudinal conveyor 232 to the beginning of the work section 235 postponed. By turning the turntable of the parking facility 270 was the Socket shaping jaw 209 in the park facility 270 indented. Also by this rotation of the turntable of the parking facility 270 became the normal shape jaw 207 at the beginning of the longitudinal conveyor 232 transported and from there via the longitudinal conveyor 232 to the end of the longitudinal conveyor 232 moved to where they stop 252 in the original position 252a is applied. From the end of the work section 235 became the socket form jaw 210 to the end of the first cross conveyor 231 postponed. The stop 251 at the first cross conveyor 231 remains in the changed position, as in the ninth step of the cycle 251b to the shortened length of the socket-forming jaw 210 Take into account.

2k is the eleventh step of the cycle. The normal shape jaw 207 was from the end of the longitudinal conveyor 232 to the beginning of the work section 235 postponed. By turning the turntable of the parking facility 270 became the socket form jaw 210 in the park facility 270 indented. Also by this rotation of the turntable of the parking facility 270 became the normal shape jaw 206 at the beginning of the longitudinal conveyor 232 engaged and from there on the longitudinal conveyor 232 until the end of the longitudinal conveyor 232 transported where they stop at the stop 252 in the original position 252a is applied. The stop 251 was in the original position 251a moved back and the normal shape jaw 205 to the end of the first cross conveyor 231 transported.

To start from the in 2k position shown to the in 2a To get to the initial position shown, still need six steps with the normal mold jaws 201 to 208 in a cyclic manner as described above. Meanwhile, the socket form jaws remain 209 and 210 unchanged in the park facility 270

The 3a to 3f describe a control with which the cycle, as in the 2a to 2k described, technically feasible.

3a and 3b show schemes for visualization of an embodiment of the control of a corrugator according to the invention. 3a shows a triangle shape 30 , here also called control element, with which the Korrugator control, ie the triggering or implementation of actions with respect to the individual action units of the corrugator, here also "control axes" or short: called "axes", namely first cross conveyor, longitudinal conveyor, second cross conveyor and Parking facility, is visualized. Along the x-axis is the control element 30 a time axis again, the 45-degree line corresponds to the flow of control within the respective control element. The planar representation of the control as a triangular control element makes the control clear.

The exemplary control element 30 has three phases 31 . 32 . 33 on: a first phase 31 representing a movement of a driver with a mold jaw; a second phase 32 representing a movement of a driver without a mold jaw; and a third phase 33 representing a break of a taker. The first phase 31 and the second phase 32 can as a movement phase 34 to be viewed as. Similarly, the third phase 33 then a rest phase 33 represents.

Each of the action units of the corrugator, ie, the first cross conveyor, the longitudinal conveyor, the second cross conveyor, and the parking device, has at least two of these phases 31 . 32 . 33 on. In the first cross conveyor, in the longitudinal conveyor and in the second cross conveyor all three phases exist 31 . 32 . 33 , In the first phase 31 with Formbacke a form jaw is transported in the respective axis; in the second phase 32 Without form jaw no form of jaw is transported in the respective axis, ie a means of transport, for. B., a driver runs empty, ie without mold jaw; in the third phase 33 If the transport unit does not move, it pauses. The parking facility has the phases 31 (= Movement with Formbacke) and 33 (= Pause) on; In addition, the parking facility still has a fourth phase, which represents a shutdown of the parking facility. Each of the controls 30 contains in the graphic representation a mark with a letter (N or M) and a number 1 to 8, which gives information about whether it is a normal-form jaw (= N) or a socket form jaw (= M) , That in the 3a illustrated exemplary control element 30 refers to a jaw N2, ie a normal jaw with the number 2.

3b gives an overview 300 about the possible in the illustrated embodiment control elements. It is in the lines 304 to 307 the control of a parking facility 304 (= Parking station); an outlet axis 305 ie, the first cross conveyor; a return axis 306 ie the longitudinal conveyor; and an inlet axis 307 , ie the second transverse conveyor considered. In the columns 301 to 303 the overview 300 a distinction is made between a long control cycle 301 with 1000 increments (eg time units, feed units, etc.), an 8-bit control cycle shortened by one-eighth 302 , as well as a shortened by a quarter control cycle 303 with 750 increments. row 304a shows various controls of an active parking station. Between the increments 0 and 60, the parking station is in a pause phase 33 between the increments 60 and 190, the parking station is in a movement phase 31 with Formbacke, between the increments 190 and 1000 or 875 and 750, the parking station is again in a pause phase 33 , row 304b shows a control element that describes the park station turned off.

3c reflects the control sequence for one revolution of eight normal forming jaws N1 to N8. In line 310 is a main virtual axis that acts as an incremental encoder, with steps 1 through 18, ie, 18 control cycles. This main axis 310 can z. B. be realized by an incremental encoder or resolver or absolute encoder. Therefore, the x-axis represents the major axis 310 a timeline. The in the representation in 3c vertically above or below each other control cycles take place at identical times. In the lines 304 to 307 With continuous circulation of the eight normal forming jaws N1 to N8, there are identical control cycles within each axis. All control elements are designed as a long control cycle, ie with 1000 increments. This is illustrated by the marking of the horizontal incremental levels to the respective control axes (parking facility, outlet, return, inlet).

The beginning of the control cycles of the intake axis 307 is at the beginning of the control cycles 1 to 18 in the main axis 310 synchronized. The beginning of the control cycles of the control axes 305 and 306 is shifted along the time axis (= x-axis) so far that the pause phase 33 always at the end of a control cycle.

3d shows in one too 3c comparable presentation a circulation with a Einschleusevorgang of two socket form jaws M1, M2 from a parking position of the parking device in the circulation. Starting position is the basic position of the corrugator, in which the two socket form jaws M1 and M2 are in the parking facility. At step 8 of the main virtual axis 310 the socket-shaped jaw M1 appears in the parking station. This sleeve-shaped jaw M1 is then the return axis 306 pass them to the inlet axis 307 transported. The same happens in the next step 9 with the socket form jaw M2. It should be noted that in control elements which describe the transport of the socket-forming jaws M1, M2 and with control elements adjacent thereto, the increments of the control elements are shortened to 750 or 875 increments, while otherwise the increments up to 1000 are counted.

The control elements of the socket form jaws are each shortened, ie they do not have 1000 increments, but only 750 or 875 increments. Furthermore, with the introduction of the socket form-jaws, normal-form-jaws result in shortened control cycles. This can be seen for the normal form jaw N8 adjoining the socket form jaw M1 in the outlet 305 ,

In 3d it can be seen that in the parking station in steps 8 and 9, the socket-shaped jaws M1, M2 are each immediately replaced after their introduction by the normal-form jaws N1, N2. In steps 8 and 9 are therefore in the control elements 304 the parking device each M1 and M2 and N1 and N2 shown above.

3e gives the circulation of six normal mold jaws N3 to N8 and two inserted socket form jaws M1, M2 again. In step 6, the socket-forming jaw M1 passes through the outlet axis 305 , passes the parking station and is in step 7 in the return axis 306 promoted. Finally, the socket form jaw M1 reaches the end of the return axis 306 and becomes in step 7 and 8 on the inlet axis 307 transported to the working section. The same procedure is implemented with a delay of 750 increments even in the sleeve-shaped jaw M2.

3f Finally, the control sequence for the discharge of the two socket form jaws M1, M2 from the orbit in the parking facility again. In step 6, the socket-forming jaw M1 passes through the outlet axis 305 , reaches the parking station, where it remains for the further control steps. The same process is realized with a delay even in the socket form jaw M2 in step 7. As a result, both socket form jaws M1 and M2 have been engaged from the orbit in the parking station. At the same time, as can be seen, the normal forming jaws N1 and N2 were introduced from the parking station into circulation.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• US Pat. No. 2,866,230 [0002]
• - EP 0270694 B1 [0003]

Claims (25)

Corrugator ( 1 ) for producing pipes with a cross-profiled pipe wall with shaping jaws ( 101 to 110 ), which are moved along at least two orbits, wherein the orbits are formed so that they each have a working section ( 135 ) and a return section, wherein the orbits in their working section ( 135 ) the mold jaws ( 101 to 110 ) lead to the formation of a common mold channel, and wherein in each return section controlled via a return device feedback of the mold jaws ( 101 to 110 ) takes place, which the forming jaws ( 101 to 110 ) from the end of the working section ( 135 ) to the beginning of the working section ( 135 ), characterized in that at least two mold jaws arranged in succession in an orbit have different lengths, and in that a detection device ( 141 . 142 ) for detecting an actual state of the guided in the orbits form jaws ( 101 to 110 ) is provided and the detection device ( 141 . 142 ) is connected to the return device such that the return of the mold jaws ( 101 to 110 ) takes place depending on the detected actual state. Corrugator according to Claim 1, characterized that the detection device is designed such that it the actual state of the mold jaws at the end and / or at the beginning of the work section or detected in the return section. Corrugator according to claim 1 or 2, characterized that the detection device at the beginning and / or at the end of the working section or is arranged in the return section. Corrugator according to one of the preceding claims, characterized in that the detection device is an electrical and / or electro-magnetic and / or pneumatic and / or mechanical and / or optical and / or thermal sensor and / or switch device having. Corrugator according to claim 4, characterized that the sensor and / or switch means a positive control having. Corrugator according to one of the preceding claims, characterized in that the detection device is formed is that they as the actual state an axial position and / or an angular position and / or a speed and / or a Time course of the mold jaws in the return section and / or in the working section, preferably at the end and / or at the beginning of the work section. Corrugator according to one of the preceding claims, characterized in that the detection device is designed in this way is that on the detection of the actual state of the time is obtained, to which one or more of the mold jaws at the end of Work section and / or arranged at the beginning of the work section are. Corrugator according to claim 7, characterized the feedback device is designed in this way is that the control depends on the feedback from the time obtained. Corrugator according to claim 7 or 8, characterized the feedback device is designed in this way is that repatriation from the end of the work section begins at the time received and / or that the return to the beginning of the work section at the time received ends. Corrugator according to one of claims 7 to 9, characterized in that the return means is formed such that disengaging and / or engaging the mold jaw with respect to the return section and / or the working section depending on the received Time takes place. Corrugator according to one of the preceding claims, characterized in that the length of each mold jaw N times a basic length, where N = 1, 2, 3, etc., and facilities for operating the corrugator, in particular connections for cooling the mold jaws, on this basic length are tuned. Corrugator according to one of the preceding claims, characterized in that each of the mold jaws on its underside a groove into which a along the orbit arranged Driver for the movement of the mold baking at least along a partial section the orbit engages, or that the corrugator a gripper , which is formed such that it forms a jaws to Movement of the mold baking at least along a partial section the orbit is engaged. Corrugator according to one of the preceding claims, characterized in that the detection device has a guide rail, which is designed such that the guided in the working portion mold jaws along the guide rail, wherein the guide rail prevents the return of the mold jaws, in particular a transverse movement of the mold jaws relative to Limited work, as long as a defined actual state of the Mold baking is not achieved, in particular as long as the mold jaws along the working section slide along the guide rail, and wherein the guide rail allows the return of the mold jaws, in particular allows the transverse movement as soon as the defined actual state of the mold jaws is reached, in particular as soon as the mold jaws an end have passed the guide rail in the area of the end of the work section. Corrugator according to one of the preceding claims, characterized in that the return section a transfer and / or parking facility has, in the Mold jaws from the return section engageable are and / or from the mold jaws in the return section be disengaged and / or parked in the mold jaws and / or be fed from the outside. Corrugator according to Claim 14, characterized that the transfer and / or parking facility the return section in a subsequent at the end of the work section, first Return segment and one at the beginning of Working section ending, second return partial section divided. Corrugator according to claim 14 or 15, characterized that in the area of transfer and / or parking facility a detection device of the actual state of the in orbit guided mold jaws and / or in the transfer and / or Park device arranged mold jaws is arranged. Corrugator according to one of the preceding claims, characterized in that the return section a first transverse conveying device, which is designed in this way is that they cross the form jaws from the end of the working section promotes to the transport direction of the mold jaws in the working section, one subsequent to the first cross conveyor Longitudinal conveyor, which is formed is that they are the mold jaws contrary to the transport direction of the Mold baking in the working section benefits and one the longitudinal conveyor subsequent second transverse conveyor, which is designed in such a way that they the mold jaws transversely to the transport direction of the mold jaws in the working section promotes to the beginning of the working section, having. Corrugator according to Claim 17, characterized that the first cross conveyor, the second cross conveyor and the longitudinal conveyor configured are that they depend on the detected actual state of Mold jaws, preferably depending on the detected axial position molding jaws starting or returning finish and / or their conveying speed to a predetermined Set value. Corrugator according to claim 17 or 18, characterized that at the beginning of the first cross conveyor and / or at the beginning of the second transverse conveyor with an anchor device a stop for the forming jaws is arranged, wherein the stop device is designed such that it stops positioned depending on the detected actual state of the mold jaws. Corrugator according to claim 19, characterized that the position of the stopper is so adaptable that when concerns the forming jaw on the stop facing away from the stop end face the mold jaw lies in a defined plane. Corrugator according to one of claims 14 to 16 in conjunction with any one of claims 17 to 20, thereby in that the control of the feedback the mold jaws is determined by control elements, wherein the first cross conveyor, the second cross conveyor, the longitudinal conveyor and the parking facility each control elements are associated with a specific Division with at least two out of three phases: i) a first phase involving a movement of a transport device with the mold jaw represents; ii) a second phase, representing a movement of the transport device without a mold jaw; and iii) a third phase representing a break in the transport facility. Corrugator according to Claim 21, characterized that the control is constructed so that in a cycle of the same length Forming the control elements are all the same length and at a circulation of different length mold jaws different long controls are included. Corrugator according to claim 22, characterized in that the different length of the control elements thereby realized that the third phase is different in length, however, the length of the first phase and the second phase remains unchanged. Corrugator according to one of claims 21 to 23, characterized in that the specific division that of the first cross conveyor, that of the second cross conveyor, and the longitudinal conveyor associated Control elements from exactly three immediately adjacent time intervals each of the three time intervals each one of the three Phases is assigned. Corrugator according to claim 24, characterized, that the last time interval of a control always the third Phase is assigned, that at the second cross conveyor associated control elements the first time interval the first Phase is assigned, and that at the first cross conveyor or the longitudinal conveyor associated control elements the first time interval is associated with the second phase.