EP3946885A2 - System zur verbesserten einführung einer trennvorrichtung sowie blasfolienanlage sowie verfahren zur herstellung und bereitstellung von zumindest zwei folienbahnen aus kunststoff in einer blasfolienanlage - Google Patents
System zur verbesserten einführung einer trennvorrichtung sowie blasfolienanlage sowie verfahren zur herstellung und bereitstellung von zumindest zwei folienbahnen aus kunststoff in einer blasfolienanlageInfo
- Publication number
- EP3946885A2 EP3946885A2 EP20715364.4A EP20715364A EP3946885A2 EP 3946885 A2 EP3946885 A2 EP 3946885A2 EP 20715364 A EP20715364 A EP 20715364A EP 3946885 A2 EP3946885 A2 EP 3946885A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- film tube
- film
- tube
- opening
- separating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/02—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a stationary cutting member
- B26D1/03—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a stationary cutting member with a plurality of cutting members
- B26D1/035—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a stationary cutting member with a plurality of cutting members for thin material, e.g. for sheets, strips or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/02—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a stationary cutting member
- B26D1/025—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a stationary cutting member for thin material, e.g. for sheets, strips or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0017—Combinations of extrusion moulding with other shaping operations combined with blow-moulding or thermoforming
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
- B29C48/2528—Drive or actuation means for non-plasticising purposes, e.g. dosing unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/28—Storing of extruded material, e.g. by winding up or stacking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/355—Conveyors for extruded articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0036—Slitting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0054—Shaping techniques involving a cutting or machining operation partially cutting through the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0063—Cutting longitudinally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92295—Errors or malfunctioning, e.g. for quality control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92323—Location or phase of measurement
- B29C2948/92438—Conveying, transporting or storage of articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92323—Location or phase of measurement
- B29C2948/92447—Moulded article
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/001—Tubular films, sleeves
Definitions
- the present invention relates to a system for the improved introduction of a separating device into a laid-flat film tube of a blown film line.
- the invention also relates to a blown film system for producing and providing a plurality of plastic film webs and to a method for operating the said blown film system.
- film webs made of plastic are produced by a blown film extrusion system.
- a film tube is created as a double-layer plastic film, which is to be divided using cutting devices in order to obtain two film webs, each of which is fed to a winding point.
- a side slitting knife To the laid film tube on To wind up two winding points, a side slitting knife must first be guided into the flat film tube, which often turns out to be very complex, since this process in particular is carried out manually by the worker.
- the object is achieved in particular by a system for the improved introduction of a separating device into a flattened film tube of a system, in particular a blown film system.
- the invention has a cutting device for severing only a first tube side of the film tube, in particular the film tube that has not yet been laid flat.
- the system has an opening device, which is arranged in the transport direction of the film tube behind the cutting device, for opening the flat film tube along the severed film tube in order to introduce the separating device into the flat film tube.
- One advantage of the invention is that the flattened film tube can be opened by the opening device in such a way that a particularly generous opening is created through which the separating device can be inserted.
- the cutting device is advantageously operated in a fully automated manner within the system without the worker having to intervene manually.
- the cutting device produces at least one severing cut on the film tube through which the severing device can later be inserted.
- the cutting device can be inserted manually by the worker or also fully automatically into the flat film tube.
- the film tube preferably has a plastic or consists of plastic. However, the film tube can also be understood to be a tube made of a different material.
- the cutting device has at least one cutting element in order to effect a severing cut on the film tube, in particular that the cutting device has two cutting elements.
- two severing cuts are made on the film tube, only a first tube side of the film web being severed.
- the film tube with the severing cuts is transported further in the direction of the opening device.
- the opening device can pass through the severing cut and cause opening along the severed film tube. This allows the separating device to be easily inserted over the opened film tube.
- the severing cut can in particular have a length of up to 10 m, preferably from 2 m to 10 m.
- the length of the severing cut can advantageously be matched to a dimension of the opening device, in particular an opening element of the opening device.
- the at least one cutting element is movable transversely to the transport direction of the film tube.
- a cutting element can only be provided which in each case produces a severing cut on the film tube.
- the cutting element can come out of the film tube are moved and moved transversely to the transport direction of the film tube in its position in order to separate the film tube there again, whereby a second severing cut is made on the film tube, which runs parallel to the first severing cut.
- the downstream opening device can each use both severing cuts to cause the film tube to open there.
- the cutting device has a drive to move the at least one cutting element, in particular to move the cutting element transversely to the transport direction of the film tube.
- the drive can also be provided to bring the cutting device from an active state to a passive state and vice versa, in the active state only a first tube side of the film tube is severed by the cutting device and in the passive state the cutting device is at a distance from the film tube .
- the cutting element can be moved towards the film tube by the drive in order to enable the first tube side to be cut.
- two cutting elements are provided which are at a fixed distance from one another.
- the two cutting elements can also be moved by the drive, in the active or in the passive state, e.g. B. the cutting elements can be swiveled into or out of the film tube.
- two severing cuts can be made in the film tube, so that a preferably symmetrical opening of the film tube is possible on opposite sides.
- the opening device can have two opening elements lying opposite one another in order to be able to engage in the severing cuts that can be made by the two cutting elements.
- one of the film sections can be lifted off on both sides and thus the separating device can be introduced on both sides.
- the opening device has at least one opening element, the opening element being insertable into the severing cut, in particular at an angle to the transport direction.
- the opening device advantageously has two opening elements, each in a severing cut of the film tube are insertable.
- the opening elements can advantageously already bear against the film tube that has not yet been severed and / or touch the film tube. As soon as the severing cut is reached, the opening elements penetrate the film tube in the area of the severing incision, thereby creating an opening effect on the film tube.
- a simple opening of the film tube can be achieved by inserting the opening element at an angle into the severing cut.
- the opening element can be insertable at least in regions between the film webs lying on top of one another by an oblique movement.
- the opening element is preferably movable along two axes.
- the opening element can be adjustable along the axes simultaneously or one after the other. It is also conceivable that the opening element can be moved along a guide slot and / or a cam disk.
- the at least one opening element is movably mounted, in particular that the opening device has a drive that is in operative connection with the at least one opening element.
- the opening element can be actively introduced into the film tube in order to enable the opening.
- the drive of the opening device can be controllable as a function of a transport speed of the film tube and / or as a function of the cutting device.
- the opening element is designed like a hook and / or bolt, in particular wherein the hook-like opening element is used for further severing of the severing tube laid flat along the severing incision.
- a hook-like and / or bolt-like design of the opening element can enable the opening element to be advantageously inserted into the film tube. In particular, this enables the first tube side to be lifted off at certain points from the second tube side.
- the opening device comprises an opening sensor, through which an insertion of the opening element into the film tube can be detected, in particular wherein the opening sensor is arranged on the opening element in such a way that when the Opening element an inside of the first tube side can be recognized by the opening sensor.
- the inside of the first tube side can in particular be understood to mean an inner surface of the film tube.
- the inside of the first tube side faces an inside of the second tube side.
- the opening sensor and the detection of the film tube can output a detection signal which, for example, signals to a control unit that the tube has been opened.
- the detection of the inside of the first tube side can provide an indication that the opening element is between the first and second tube side and that the first and second tube side are therefore successful are separated. If, for example, the inside of the first tube side is not recognized within a predetermined period of time, an error can be output.
- the opening sensor can advantageously be an optical sensor. In this way, the film tube can in particular be recognizable independently of the film material.
- an anti-stick device for locally changing an adhesive property of an inside of the film tube, in particular the anti-stick device being arranged in front of the opening device in the transport direction of the film tube and / or integrated into or with the cutting device the cutting device is coupled.
- the anti-adhesive device can be a nozzle for spraying the film tube, in particular an inside of the film tube, with an anti-adhesive agent.
- the anti-adhesive agent can for example comprise an oil and / or a silicone spray.
- the anti-adhesive agent has a powder by means of which the adhesive property can be changed.
- the adhesive property can be understood to mean gluing the first and second tube sides to one another, in particular after the film tube has been laid flat.
- the adhesive property can be an electrostatic attraction of the first and second hose sides.
- the local change in the adhesive property on the inside of the film tube can simplify the introduction of the opening element and / or the separating element. Integration in the cutting device or coupling with the cutting device can ensure that the adhesive property in the area of the severing cut is changed, in which the opening and / or separation of the film tube can then also be carried out.
- the opening device is designed to expand a second tube side of the film tube opposite the first tube side in such a way that an expansion force of the second tube side exceeds a holding force between the first and second tube side.
- the holding force can result from gluing the first and second tube sides to one another, in particular after the film tube has been laid flat.
- the holding force can be an electrostatic attraction of the first and second hose sides.
- the holding force can thus be attributed in particular to an adhesive property of the first and second hose sides. If the opening element is introduced into the severing cut, the opening element can be pressed against the second tube side, whereby the second tube side experiences an expansion.
- the film tube is pretensioned for transport along the transport direction.
- the first tube side will initially follow the expansion of the second tube side until the pretensioning of the film tube causes the first tube side to detach from the second tube side. This enables an advantageous opening process.
- a deflection unit for deflecting the film tube
- the deflection unit has an air supply through which an air cushion can be formed between the film tube and the deflection unit, preferably between a second tube side of the film tube and the deflection unit is.
- the deflection can be used to cool the extruded film tube. A contactless deflection can be made possible by the air cushion. It is not necessary for the film tube to touch the deflection unit.
- a constriction is provided at which a width of the film tube can be reduced, the cutting device being arranged in relation to the constriction and the deflection unit in such a way that the severing cut made by the cutting elements of the cutting device in the Film tube can be brought about, air that has accumulated between the constriction and the deflection unit can be released.
- air that is located inside the film tube can collect between the constriction and the deflection unit. In this case, the accumulated air can be enclosed between the constriction and the deflection unit, so that an air bubble formed thereby grows during the production of the film tube.
- the cutting device in particular the severing cut, creates a tube section which enables fluid communication between an inner region of the film tube and an outer region of the film tube. In this way, access to the accumulated air can be created, which can escape when the incised tube section passes the area of the accumulated air.
- the accumulated air can thus be reduced by the cutting device, in particular as a result of a clever arrangement of the cutting device.
- the invention also includes that a contact unit is provided, in particular the opening device has the contact unit, wherein the contact unit can be brought or moved between an active position and a passive position, in particular in the active position the contact unit moving the flattened film tube into one position offset or contacted in such a way that a reliable movement of the separating device into the film tube and / or out of the film tube is made possible.
- the advantage of using the contact unit is that there is a collision when moving the separating device with the film tube is prevented. For example, it is conceivable that the contact unit presses against the flattened film tube, so that a sufficiently large distance is created from the path of movement of the separating device so that this separating device can move into / in front of the tube or out of the film tube.
- the contact unit may act in a non-contact manner, for example by means of compressed air or blown air, to bring the flattened film out of its starting position so that a sufficiently large distance is created from the path of movement of the separating device. This means that the contact unit remains immobile between the two positions.
- the contact unit can be transferred into a passive position in which the contact unit is at a distance from the film tube.
- the contact unit assumes the passive position, for example, when the separating device is in its operating position in order to separate the flat film tube into two separate film webs.
- the invention includes that the contact unit can be brought or moved into the respective position via a drive, in particular the contact unit being in operative connection with the opening device.
- the drive can be designed pneumatically and / or hydraulically and / or electromechanically in order to transfer the contact unit from a passive position to an active position and vice versa.
- the invention also includes that the opening device for moving its opening elements has the same drive that is also used for the contact unit. Alternatively, separate drives can be provided for the contact unit and for the opening device.
- the contact unit according to the invention can be arranged movably on a frame in such a way that the contact unit is oriented perpendicular to the transport direction of the film tube and parallel to the alignment of the film tube.
- On the frame z. B. also be attached to the opening device.
- the drive for the contact unit can exercise a lifting movement for moving the contact unit into its respective position. A rotary and / or pivoting movement of the contact unit is also conceivable so that the contact unit can assume its respective position.
- the drive for the contact unit can, for. B. have a servomotor with a deflection rod that is in a ok
- Link guide is guided, is connected, at the same time the deflection rod acts on the contact unit.
- the movement of the opening device is advantageously carried out at the same time as the contact unit is moved into its respective position.
- the contact unit is advantageously designed like a bar and extends transversely to the transport direction of the film tube.
- the elongated extension of the contact unit has the effect that, in the active position of the contact unit, the flattened film tube is far enough from the path of movement of the separating device, thereby preventing a risk of collision when moving the separating device with the film tube.
- the cutting device is designed in such a way as to effect two severing cuts on the film tube, the opening device having two opening elements, each opening element being insertable into a severing cut.
- the contact unit can have two contact elements which can be moved in such a way that in the active position of the contact unit the contact elements act on the flattened film tube, which has two opposing fold lines, and the first contact element is between the first fold line and the first severing cut and the second contact element is located located between the second fold line and the second severing cut.
- the severing cuts can be made simultaneously or sequentially by the cutting device on the film tube.
- the contact elements are advantageously on one level with one another, so that in the active position of the contact unit, the film tube can be guided evenly out of the travel path of the separating device. If the separating elements of the separating device are located within the film, in particular in their operating position, the separating elements of the separating device cut through the flattened film tube at its two fold lines into two separate film webs.
- the invention also relates to a blown film system for producing and providing a plurality of plastic film webs with a blow head from which a film tube can be extruded. It is provided here that the film tube can be conveyed along a transport direction, the blown film system being provided with a lay-flat device downstream of the blow head, through which the film tube as double-layer plastic film can be laid flat. Furthermore, the blown film system has a separating device which is designed in such a way that the film tube laid flat can be separated into two separate film webs.
- the blown film system comprises a system for the improved introduction of the separating device into the flattened film tube with a cutting device for severing only a first tube side of the film tube, in particular the film tube that has not yet been laid flat, and an opening device which is arranged behind the cutting device in the transport direction of the film tube, for opening the flat film tube along the severed film tube in order to insert the separating device into the flat film tube.
- the blown film system has a drive unit for bringing about a movement of the film tube along the transport direction.
- the drive unit is preferably located downstream of the system.
- two winding points are provided, with a film web being able to be fed to each winding point.
- the blown film line according to the invention thus has the same advantages as are described in detail with reference to the system.
- the cutting device is preferably arranged in the transport direction of the film tube after a frost line position and / or in a calibration device.
- the calibration device can be designed to limit a diameter of the film tube and / or to reduce a temperature of the film tube.
- a film material of the film tube is in particular in the form of an at least partially liquid mass which, from a certain exit length, is cooled to such an extent that the film material becomes solid. This position can be referred to as the frost line position.
- a severing cut can advantageously be made in solid film material, since further deformations of the cut are not to be expected, which would be difficult or impossible to control, especially before the frost line position due to the viscosity of the at least partially liquid film material.
- the separating device can be provided separately from the opening device or at least partially integrated into the opening device.
- the separating device can have a separating element which is connected and / or coupled to an opening element of the opening device. This can automatically create a correct positioning of the separating element after opening can be guaranteed.
- the separating device is preferably provided for mechanically separating the film tube into two separate film webs. Furthermore, it can be provided that the opening device is located in front of the drive device.
- a further advantage can be that the cutting device is arranged in the lay-flat device or is located downstream of the lay-flat device.
- the cutting device is advantageously located in the flattening device, so that only a first tube side of the film tube is severed. Since the film tube has not yet been laid flat, there is less risk of the film tube being cut through by the cutting device on both tube sides.
- the cutting device is located downstream of the flattening device, which means that when the film tube is laid flat, the cutting device only cuts through a first tube side of the film tube. The lower sheet of film may only be scored, but not cut.
- the cutting device has a drive to bring the cutting device from an active state to a passive state and vice versa, with only a first tube side of the film tube being severed by the cutting device in the active state and in the passive state the cutting device is at a distance from the film tube.
- the opening device has a drive to bring the opening device from an active position to a passive position and vice versa, in the active position an opening effect can be brought about on the flattened film tube and in the passive position the opening device is spaced from the film tube is. This enables automation of the blown film system and / or a temporary change of state of the cutting device and / or the opening device.
- the drive does not require an operator to manually adjust the cutting device and / or the opening device.
- driving the opening device it can are in particular a pneumatic drive.
- the opening element is designed as a compressed air nozzle for opening the film tube by means of a particularly targeted, compressed air supply. This enables the film tube to be opened without contact.
- the separating device has a drive in order to move the separating device into the film tube which is at least partially opened by the opening device.
- the separating device can be introduced fully automatically into the opened film tube.
- a process-reliable introduction of the separating device into the film tube can hereby be achieved.
- rejects of film material can be reduced if the introduction of the separating device can be carried out reliably and in particular manual, possibly time-consuming, opening of the film tube and / or positioning of the separating device is not necessary.
- the separating device is integrated into the opening device. As a result, the film tube laid flat can be separated into two separate film webs as soon as the film tube is opened.
- the blown film system has a control unit, preferably for coordinating the cutting device and the opening device, in particular wherein the control unit acts on at least one of the drives.
- the control unit which can be a control and / or regulating unit, is advantageously in data communication with one or all of the drives, that is to say with the drive of the separating device and / or the drive of the opening device and / or the drive of the cutting device and / or the drive unit which is responsible for the movement of the film tube along the transport direction.
- the control unit can preferably comprise a processor and / or a microcontroller.
- the control unit can also be part of the system and / or one of the winding stations.
- Increased automation of the blown film line can thus be achieved.
- coordinating the cutting device and the opening device in particular a transport speed and / or a transport path of the film tube in the transport direction of the film tube can be taken into account.
- the control unit can thus adjust the opening device to the severing incision be achieved.
- the coordination can take place directly in that control signals from the cutting device are matched to control signals from the opening device.
- the coordination takes place indirectly, for example in that the severing cut is recognized via a sensor device and the opening device is activated as a function of the recognition of the severing incision.
- the control unit can preferably also be designed to coordinate the cutting device and / or the opening device with the separating device and / or a movement of the film tube. This can ensure that the separating device is activated on the correct side of the film tube and / or at the correct point in time.
- the control unit has a start module for controlling the cutting device for, in particular once, performing the severing of the first tube side when the blown film system is started up.
- a scrap of film material can arise, which can be reduced by efficiently opening the film tube and efficiently introducing the separating device.
- the incised tube section can be assigned to the scrap in a simple manner, so that a continuous material of the film tube can then be used at the winding points.
- it can be useful to open the film tube if the separating device has not yet been inserted into the film tube when starting up.
- the separating device can then remain in a separating position, so that the film tube is continuously separated.
- Starting up the blown film line can mean, in particular, the creation of a new film tube.
- production of the blown film line can be stopped and / or interrupted before starting up.
- the start-up of the blown film system thus offers a favorable point in time for controlling the cutting device.
- the control unit has a winder module for recognizing a winding change at at least one of the winding points and, in particular, for performing the severing of the first tube side once when the winding change is recognized.
- One Change of lap can include a transverse separation of the entire tube of film.
- control unit has a protocol module for creating a particularly digital winding protocol, by means of which a position of the severing of the first tube side for at least one film web can be assigned.
- the digital winding log can contain information about a winding produced from the film tube.
- an auxiliary separating unit is arranged in front of the winding points in the transport direction of the film tube, which has a further opening device for releasing the first tube side from a second tube side, in particular the separated film webs from one another, and / or at least one transverse separating means for separating of a head region of the laid-flat film tube.
- the auxiliary separating unit is preferably arranged downstream of the separating device in the transport direction of the film tube. It can thus be provided that the film webs are placed on top of one another again after being separated by the cutting device. This can result in a simplified transport.
- the auxiliary separating unit can thus provide a second opening process before reaching the winding points, which is in particular designed analogously to the first opening process for the separating device.
- the film tube In front of the winding points, especially when starting up the blown film system, the film tube can be completely transverse, in particular perpendicular, to the transport direction by the transverse separating means be severable to separate the head area.
- the head area can be understood as a coherent area of the film tube which is located in front of the severing cut, in particular in the transport direction of the film tube.
- a sensor unit checks the moving film tube along the transport direction and communicates with the control unit and / or with the drive of the cutting device and / or with the drive of the opening device and / or with the drive of the Separator stands.
- the sensor unit can check the condition of the film tube or recognize one or the other severing cut, whereby the control unit can use this information to check or control the respective drives.
- the separating device in particular two separating elements, in order to cut through the film tube laid flat at two positions.
- the separating elements can be side slitting knives that cut through the material, in particular at the fold lines of the flattened film tube. This allows an advantageous separation of the film tube into two film webs.
- the separating device can have at least one guide element for guiding a severing cut of the first tube side to at least one of the separating elements.
- the guide element can be designed as a non-cutting guide element in order to guide the film tube, in particular the first tube side of the film tube. This can ensure that the severing cut, which was previously made in the first tube side by the cutting device, can be picked up and / or continued by the cutting device.
- several, preferably two, guide elements can be provided for each separating element.
- the guide elements can be arranged in a V-shape.
- the separating elements can be moved perpendicular to the transport direction of the flattened tubular film and parallel to the flat tubular film plane are. This means that the separating elements can be moved to the one and the other first tube side of the flattened film tube in order to effect a severing of the material on both fold lines. It is thus conceivable that the cutting device can make two severing cuts in a central region of the first tube side in the film tube. As a result of the movement of the separating elements, the separating elements can initially be introduced into the film tube and, in particular depending on a diameter of the film tube, can be moved to the fold lines. In particular, the film tube moves in the transport direction during this time, the severing cut can thereby be lengthened until the separating elements have reached the fold lines.
- the opening elements can be moved obliquely to the tubular film plane.
- the opening element is advantageously designed in the manner of a bolt, which enables the film tube that has already been severed to be opened more easily.
- the opening element penetrates the film tube reliably via the inclined angle and can thus be used to open the film tube.
- a second tube side of the film tube can furthermore be expandable in such a way that an expansion force of the second tube side exceeds a holding force between the first and second tube side. The opening of the film tube can thus be made possible in a simple and process-reliable manner.
- the invention can provide a contact unit that can be brought between an active position and a passive position, wherein in the active position the contact unit puts the flattened film tube in such a way that a reliable movement of the separating device into the film tube and / or out of the Foil tube is enabled.
- the contact unit advantageously makes contact with the flat film tube in order to move it out of the travel path of the separating device.
- the transfer of the contact unit into the active and passive position can take place motionless, that is, the actual position of the contact unit is the same in the active and passive position.
- the contact unit can keep the film tube out of the travel path of the separating device without contact, for example by means of compressed air or blown air. It is also conceivable that the contact unit is a Moves between the active and passive position executes and in the active position touches the flat film tube.
- the separating device is advantageously arranged downstream of the contact unit and the opening device in the transport direction of the film tube. It is also conceivable that the contact unit is arranged downstream of the opening device in the transport direction. In addition, the invention can also include that the control unit is provided for coordinating the contact unit.
- the flattened film tube on the first tube side has at least one severing cut, in particular the flattened film tube on the first tube side having two severing steps that are arranged parallel to one another or offset from one another are arranged.
- the opening device in particular the two opening elements, can move into each of the severing cuts, thereby creating an opening for the severing device so that it can be moved reliably into the film tube or out of the film tube.
- the system can be operated in a retraction process and in an extension process, wherein in the retraction process the separating device can be automatically transferred from a parking position in which the separating device does not cut the film tube into an operating position, in which causes the separating device to cut through the film tube at its fold line and / or fold lines.
- the separating device In the parked position, the separating device is located outside of the film tube or has a defined distance from the film tube.
- the control unit advantageously controls the entry process and the exit process, which is controlled and operated fully automatically within the blown film system.
- the contact unit with its respective contact element rests directly against the first and second side areas of the film tube in its active position. In the active position of the opening device, it is located at least partially in the central area of the film tube, whereby an opening on the film tube is moved so that the separating device can be moved out of the film tube or into the film tube.
- the blown film system according to the invention can provide that the separating device can be moved into a central position for the retraction process and the extension process, in which the separating device is at least partially located in the central area within the film tube, with the opening device in particular being in the active position.
- the separating device performs a movement in the retraction process from its parking position into the central position and then in the direction of the operating position.
- the extension process on the other hand, the separating device is moved from the operating position first into the central position and then into the park position.
- the contact unit on the side area of the film tube advantageously acts for the retraction process and for the extension process, thereby ensuring a reliable movement of the separating device without a collision with the film tube.
- the contact unit can be a deflection roller for the flattened film tube to be transported, which can be brought at least between the active and the active position, whereby the film tube can be effectively brought out of the transport path of the separating device.
- the blown film system according to the invention can provide that an additional cutting device is provided, which can be brought into an operating mode and a sleep mode, is positioned at a distance from the film tube in the sleep mode and introduces an auxiliary cut through both tube sides of the film tube in the operating mode.
- the additional cutting device is arranged downstream of the separating device in the transport direction of the film tube.
- the additional cutting device is advantageously also arranged downstream of the opening device in the transport direction of the film tube, so that the running-in process can be started reliably.
- a detection means can be provided which detects at least one of the positions of the separating device, the additional cutting device changing from the idle mode to the operating mode in the event of a malfunction in which the separating device moves from the operating position to the parking position.
- the detection means can e.g. B. be a sensor that determines the respective position of the separating element or the separation device can recognize.
- it can be a pressure sensor or an optical sensor in order to detect the position of the separating element.
- a detection means can be provided which detects the extent to which a cut is made on the fold lines of the film tube. This can e.g. B. be done via an optical sensor.
- the additional cutting device can be activated in order to switch to its operating mode.
- a control unit is advantageously provided which is in data communication with the cutting device, opening device. Separation device, contact unit, additional cutting device and detection means is.
- the separating device can advantageously be designed with a drive which has an active element in order to bring the separating elements into the respective position.
- the active element can exert a certain tensile force on the separating element, so that a satisfactory severing of the film tube takes place at the fold line.
- the active element can be a cable pull.
- the active element can also have a spring element or a pneumatic cylinder in order to allow this tensile force to act on the separating element.
- a method for producing and providing at least two or more film webs made of plastic, in particular by means of a blown film system according to the invention is claimed.
- the process comprises the following steps:
- Severing preferably by a cutting device of the blown film system, from only a first tube side of the film tube, in particular before the film tube is laid flat,
- a method according to the invention thus brings with it the same advantages as have already been described in detail with reference to a system according to the invention and / or a blown film line according to the invention.
- a film material of the film tube can be ejected from the blow head, in particular in an at least partially liquid state.
- the severing is preferably done mechanically, e.g. a cutting element of the cutting device is introduced into the first tube side.
- the film tube is moved along a transport direction, in particular as an endless material, during the process.
- the cutting element can be rigidly positioned so that the severing takes place automatically through a movement of the extruded film tube.
- the first tube side is removed from a second tube side opposite the first tube side, so that the first and second tube sides are at least partially spaced apart after opening.
- separating elements can be placed in a simple manner at least partially in the severing cut for separating the film tube laid flat, in order to enable automatic separation when the film tube is transported on.
- the flattened film tube is preferably separated by moving the film tube relative to the separating device.
- the separating device can remain rigidly in a separating position, at least with respect to the transport direction of the film tube. An active cutting movement of the cutting device is therefore not necessary during cutting.
- the film tube can be converted into one or more, preferably two, film webs.
- a cutting device in order to cut through the first tube side, a cutting device is first brought into an active state in which the first tube side of the film tube is severed by the cutting device and then brought into a passive state in which the cutting device has a distance to the film tube.
- a deactivation of the cutting device can be provided when the severing cut, in particular with a predetermined cutting length, is made in the first tube side. Further damage to the film tube can thus be avoided, so that the severing cut is only present locally for opening the film tube in a single tube section.
- the opening device in order to open the flat film tube, the opening device is brought into an active position in which an opening effect is brought about on the flat film tube and is then brought into a passive position in which the opening device is spaced apart from the film tube is.
- the opening device is no longer required. In the passive position, further intervention by the opening device in the manufacturing process of the film can be avoided.
- the severing of the first tube side and the opening of the flattened film tube are carried out and automatically coordinated at different positions along the transport direction of the film tube.
- the automatic coordination can preferably be done by a control unit of the blown film line.
- control signals for cutting through and opening the film tube can be coordinated.
- the severing cut is recognized and the opening is carried out as a function of the recognition of the severing incision.
- the opening element can advantageously be introduced between the first tube side and a second tube side opposite the first tube side, to remove the tube sides from one another at least in sections.
- the separating device can be introduced into the film tube in a simple manner.
- the flat film tube is cut through at two positions when the first tube side is cut.
- this can make it possible for the film tube to be opened on both sides when it is opened.
- a central area of the first tube side can be retained in a coherent manner, so that further transport of the film webs can be made possible even after the flat film tube has been separated, in particular without additional measures.
- separating elements are moved perpendicular to the transport direction of the flat film tube parallel to a flat tube film plane.
- the flat tubular film plane can be understood to mean a flat extension of the first and second tube sides, in particular wherein the first and second tube sides run parallel and are only connected in the edge regions of the flat film tube.
- the film tube is deflected after extrusion by a deflection unit for deflecting the film tube, in particular with an air cushion being formed between the film tube and the deflection unit, preferably between a second tube side of the film tube and the deflection unit.
- the air cushion enables contactless deflection of the film tube at the deflection unit. This prevents damage to the film tube. If the air cushion is formed between the second tube side of the film tube and the deflection unit, it is also possible prevent air from being blown into the film tube and causing the film tube to expand locally.
- an adhesive property of an inside of the film tube is changed locally at the severing incision in order to simplify the opening of the flat film tube.
- an anti-adhesive agent can advantageously be sprayed into the film tube, preferably onto an inside of the first and / or second tube side.
- a holding force of the first and second tube sides after the film tube has been laid flat can be reduced, so that a subsequent opening process can be simplified.
- the film tube can be cooled locally in order to change the adhesive property and / or to prevent the film material from blocking.
- a second tube side of the film tube opposite the first tube side is stretched in such a way that an expansion force of the second tube side exceeds a holding force between the first and second tube side.
- the holding force can in particular be traced back to an adhesive property, for example in the form of electrostatic attraction, of the first and second hose sides.
- the severing of the first tube side is carried out, in particular once, when the blown film system is started up.
- the start-up offers an advantageous point in time for severing the first tube side, in particular if a head area of the film tube is produced as scrap during start-up anyway.
- at least one film web is wound onto at least one roll, preferably from two film webs onto two rolls, in particular the first tube side being severed when a change of roll is detected.
- a winding change can be carried out in particular as a function of the packaging of film products of the film tube.
- a full roll can be removed from the winding point and an empty winding roll can be provided at the winding point.
- the blown film line can advantageously be stopped or its production speed reduced.
- a hose section damaged by the severing cut can thus be identified and / or removed in a simple manner.
- a, in particular digital, winding log is created, by means of which a position of the severing of the first tube side can be assigned for at least one film web.
- the film tube is opened further by detaching the first tube side from a second tube side, in particular by detaching the separated film webs from one another, and / or separating a head area of the flattened film tube.
- the head region of the film tube can in particular comprise a contiguous region which is arranged in front of the severing cut in the transport direction of the film tube. The separation can take place completely through the film tube in particular by a cut transversely and / or perpendicularly to the transport direction.
- the method for producing and providing a plurality of plastic film webs in a blown film system with a blow head from which a film tube is extruded be designed such that the film tube is conveyed along a transport direction.
- the method can include a lay-flat device downstream of the blow head, by means of which the film tube is laid flat as a double-layer plastic film.
- the method preferably uses a system for the improved introduction of a separating device into the flattened film tube with a cutting device and an opening device, the cutting device only severing a first tube side of the film tube, in particular the not yet flattened film tube.
- the opening device which is arranged behind the cutting device in the transport direction of the film tube, can open the flat film tube along the severing cut of the film tube, the separating device being inserted into the opened film tube, which separates the flat film tube into two separate film webs, each film web having one Winding point is fed.
- the cutting device can be brought from an active state to a passive state and vice versa, with only a first tube side of the film tube being severed by the cutting device in the active state and the cutting device in the passive state Having a distance to the film tube, and / or the opening device can be brought from an active position to a passive position and vice versa, wherein in the active position an opening effect is brought about on the laid-flat film tube and in the passive position the opening device is spaced from the film tube, wherein after the Cutting device has been introduced into the film tube, the cutting device is / are transferred into the passive state and / or the opening device into the passive position.
- the method according to the invention can provide that, in a retraction process, the separating device is automatically transferred from a parking position in which the separating device does not cut the film tube into an operating position in which the separating device cuts the film tube at its fold line and / or fold lines .
- the following steps can be carried out for the running-in process: a) Transfer of the cutting device to the active state at the beginning of the retraction process, so that at least one severing cut or two severing cuts are made on the first tube side of the film tube, b) Transfer of the opening device from the passive position to the active position, with at least in the active position one opening element, in particular two opening elements each protrude into a severing cut,
- the steps mentioned overlap at least partially in time. It is important that the opening device is in the active position in order to create an opening for the separating device on the film tube so that the separating device can reliably get into the film tube.
- the upstream cutting device has the effect that the severing cut is created for the opening elements.
- step a) a central region of the film tube and two side regions of the film tube are formed between the two severing cuts, the side region being delimited by a fold line of the film tube and the facing severing cut.
- step c) the separating device is transferred to a central position in which the separating device is at least partially in the central area within the film tube, the opening device being in the active position, with the Separating device moves from the middle position to the operating position.
- step c) a contact unit moves from a passive position, in particular in which the contact unit is at a distance from the film tube, into an active position, with the contact unit acting on the side area of the film tube in the active position so that the separating device works reliably the parking position in the Middle position moves.
- a fully automatic process of inserting the separating device into the film tube can thus be implemented.
- the method according to the invention can advantageously provide that after the separating device has reached the central position, the following steps take place: d) Transferring the opening device from the active position to the passive position e) Transferring the contact unit from the active position to the passive position.
- the cutting device can then be transferred from the active state to the passive state in a step f). If the cutting device is in its operating position, the cutting device can cancel the cutting of the first tube side of the film tube.
- the separating device in an extension process is automatically transferred from an operating position in which the separating device causes the film tube to be severed at its fold line and / or fold lines, into a parking position in which the severing device does not sever of the film tube causes.
- an automatic extension process of the separating device from the operating position to the parking position is also possible.
- the following steps can be carried out for the deployment process according to the invention: h) Transfer of the cutting device to the active state at the beginning of the deployment process, so that at least one severing cut or two severing cuts are made on the first tube side of the film tube, i) Transfer of the opening device from the passive position to the active position, wherein in the active position at least one opening element, in particular two opening elements, each protrude into a severing cut,
- step j) can overlap in time, for example step j) can already start in time when the opening device has not yet reached its active position with regard to step i).
- the method can provide that during step j) the separating device is transferred to a central position in which the separating device is at least partially in the central area within the film tube, the opening device being in the active position, wherein in a step k) the separating device moves from the middle position to the park position.
- the movement of the separating device from the operating position in the direction of the central position is opposite to the movement of the separating device from the central position into the parking position.
- the separating device is located outside the film tube, the separating device being located inside the film tube during the movement of the separating device from the operating position into the central position.
- step i) a contact unit is moved or moved from a passive position, in particular in which the contact unit is at a distance from the film tube, into an active position, with the contact unit acting on the side area of the film tube in the active position so that the separating device moves reliably from the operating position into the middle position and into the park position.
- step i) takes place before step k), so that the film tube does not collide with the separating device during its movement into the parking position.
- the opening device advantageously remains in the active position while the separating device leaves the central position in the direction of the parking position. This creates a reliably functioning extension process.
- the extension process is only ended after the separation device has reached the parking position and the following steps have been taken: m) Transfer of the opening device from the active position to the passive position n) Transfer of the cutting device from the active state to the passive state.
- the steps mentioned can take place sequentially or at least partially overlap in time.
- the method according to the invention can be developed in that a detection means is provided which detects an incident during the production of the film webs in which the separating device, in particular a faulty separating element, moves from the operating position to the parked position, whereby an additional cutting device in a step p) is controlled, which introduces an auxiliary cut through both tube sides of the film tube in an operating mode, the auxiliary cut being arranged downstream of the separating device in the transport direction of the film tube.
- a loss of flat webs can be effectively prevented by immediately making an auxiliary cut through both tube sides of the film tube using the additional cutting device in the event of a malfunction. This ensures that both winding points are fed with one film web, even if a separating element of the separating device unexpectedly moves out of the operating position.
- the method according to the invention can provide that the disrupted separating element is replaced by a functioning separating element, and then the steps of the retraction process according to the invention are carried out for the separating element that is now functioning.
- the following steps according to the invention, which have already been described, are advantageously carried out:
- the method according to the invention can provide that before the separating device, in particular the separating element, moves out of the middle position in the direction Moves to the operating position, the cutting element moves into the passive state, the following steps take place:
- Both the system and the blown film system according to the invention and the method according to the invention make it possible to carry out a simplified start-up process on the blown film system, which is particularly advantageous for untrained operating personnel.
- the separating device can be introduced into the film tube more easily and with greater process reliability. Productivity can be increased since the cutting device can be inserted in a shorter time, in particular because the cutting device is inserted in an automated manner.
- the separating device can be inserted even at higher web speeds of the film tube, whereby the productivity can be increased considerably.
- the opening device can also be automated, a simplified separation of the individual film webs can be achieved, and the time savings when separating the film webs can be increased.
- FIG. 1 shows a schematic view of a blown film plant according to the invention with a system for the improved introduction of a separating device into a film tube laid flat
- FIG. 2 shows an inventive opening device according to Figure 1, wherein the
- Opening elements of the opening device are in a passive position
- FIG. 3 shows an opening device according to FIG. 2, the opening elements being in an active position
- FIG. 4 shows the opening device according to FIG. 2, the separating device in the
- FIG. 5 shows the opening device according to FIG. 2, the separating device being located within the film tube
- FIG. 6 shows an enlarged view according to FIG. 1, the cutting device having two
- FIG. 7 shows an enlarged view of FIG. 1, the cutting device being a
- FIG. 8 shows a further exemplary embodiment of a control unit which can be integrated according to FIG. 1,
- FIG. 9 shows a separating device of a system according to the invention in schematic form
- FIG. 10 shows a cutting device of a system according to the invention in a further embodiment
- 31-40 show a possible embodiment in which an additional cutting device can act on the film tube laid flat.
- FIG. 1 shows a sketch of a blown film installation 1, in which a film tube 2 is extruded from a blow head 4 and conveyed away in the transport direction Z.
- the material of the film tube 2 is initially still in the form of a melt-like extrudate.
- plastic is first plasticized.
- the resulting mass is fed via a connecting line to the blow head 4, with which the film tube 2 is formed from the mass. Additional extruders can be assigned to the blow head 4 so that multilayer films can be produced.
- a method 100 according to the invention for producing a film using the blown film line 1 is shown in FIG. In the following description of the blown film installation 1, reference is also made to the method 100.
- the film tube 2 When the film tube 2 is extruded 101 from the blow head 4, the film tube 2 is initially present as a film bubble when it leaves the blow head 4, in which the internal pressure is slightly higher than the ambient pressure. Because of the increased Internal pressure, the not yet solidified material of the film tube 2 expands. Ultimately, both the diameter of the finished film tube 2 and the thickness of the film material are set in this way.
- the not yet solidified film bubble or film tube 2 then passes into the calibration device 15.
- the diameter of the film tube 2 is limited here.
- the film tube 2 cools down to a temperature at which subsequent deformation is no longer possible or only possible with the use of greater forces.
- the position at which this phase transition takes place is often referred to as the “frost line”.
- the film tube 2 After leaving the calibrating device 15, the film tube 2 arrives in a lay-flat device 5, in which the film tube 2 is almost completely reshaped into a lay-flat, double-layer film web, which lies essentially in a tube film plane 9.
- the flattening device 5 flattens 103 the film tube to form a double-layer plastic film, which is connected in particular in edge regions.
- the flattening device 5 has guide elements 5.1, by means of which a stepwise or continuous reduction of a width 2.3 of the film tube 2 is made possible.
- the blown film system 1 has a squeezing device 13 with squeezing rollers, in particular so-called nip rollers, which prevent larger amounts of air from remaining inside the film tube 2 during its further transport.
- the film tube 2 is further forwarded via transport rollers (not explicitly shown) in the direction of two winding points 7, 8.
- the blown film installation 1 has a system 10 with which a separating device 40 can be introduced into the flattened film tube 2 in an improved manner.
- the system 10 comprises a cutting device 20 and an opening device 30.
- the cutting device 20 cuts through 102 according to FIG. 1 as well as 6 and 7 only a first tube side 2.1 of the film tube 2.
- the cutting device 20 can be designed according to FIG. 6 and / or FIG.
- the cutting device 20 has cutting elements 21 in order to effect a severing cut 3 on the film tube 2.
- FIG. 6 shows two cutting elements 21.
- FIG. 7 shows only one cutting element 21.
- the cutting element 21 can be moved transversely to the transport direction Z of the film tube 2.
- the cutting device 20 has a drive 22 in order to move the at least one cutting element 21.
- the movement can take place transversely to the transport device Z of the film tube 2.
- the drive 22 can be provided in order to bring the cutting device 20 from an active state into a passive state and vice versa.
- the active state only a first tube side 2.1 of the film tube 2 is severed by the cutting device 20.
- the second hose side 2.2 is not severed.
- the passive state the cutting device 20 is at a distance from the film tube 2.
- An anti-adhesive device 23 for locally changing an adhesive property of an inside of the film tube 2 can preferably be integrated into the cutting device 20.
- at least one of the cutting elements 21 of the cutting device 20 can have the anti-stick device 23, as shown in FIG. If the cutting element 21 is at least partially introduced into the film tube 2 for severing 102 the first tube side 2.1, an anti-adhesive agent can be introduced into the film tube 2, preferably sprayed into it.
- the anti-stick agent can e.g. include an oil or silicone spray.
- the squeezing device 13 also forms a constriction 13.1 at which the width 2.3 of the film tube 2 can be reduced.
- This can in particular be understood to mean that a diameter of the film tube 2 is reduced in at least one direction. This can take place, for example, when the film tube 2 is laid flat. However, this can occur in particular due to overpressure in the film bubble come that at least a few air particles are carried along and pass through the bottleneck 13.1.
- the entrained air can accumulate in front of a deflection unit 51, in particular in the form of a roller, for deflecting the film tube 2 if the deflection unit 51 is arranged downstream of the constriction 13.1 in the transport direction of the film tube 2.
- the cutting device 20 is arranged in relation to the constriction 13.1 and the deflection unit 51 in such a way that air that has accumulated between the constriction 13.1 and the deflection unit 51 can be released by the severing cut 3 made by the cutting element 21.
- the deflection unit 51 also has an air supply 52, in particular for the contactless deflection of the film tube 2. An air cushion between the film tube 2 and the deflection unit 51 can be formed by the air supply 52.
- the contactless deflection that occurs as a result damage to a surface of the film tube 2 can be reduced or avoided.
- the film tube 2 is advantageously guided in such a way that the air cushion is formed between the deflection unit 51 and the closed second tube side 2.2. This can prevent air from being blown into the film tube 2 through the air supply 52.
- an opening device 30 is provided, which is arranged behind the cutting device 20 in the transport direction Z of the film tube 2.
- the opening device 30 serves to open the flat film tube 2 along the severed film tube 2 in order to introduce the separating device 40 into the flat film tube in an improved and simplified manner. This is shown schematically in FIGS. 2 to 5. According to FIG. 6, the two cutting elements 21 are at a fixed distance from one another.
- the opening device 30 has two opening elements 31, the opening elements 31 each being insertable into a severing incision 3 that was previously made by the cutting device 20.
- the opening elements 31 can be activated via a drive 32.
- the separating device 40 has separating elements 41, which have a Drive 42 are movable.
- the separating elements 41 can have guide elements 43.
- opening elements 31 can have different geometries. E.g. the opening elements 31 can be designed like a hook, which is not explicitly shown.
- the opening elements 31 are designed like bolts.
- the opening elements 31 are at a distance from the flattened film tube 2. According to FIG.
- the opening elements 31 are in their active position and are at least partially located within the film tube 2. During the movement of the opening elements 31 from their passive position according to FIG. 2 in their active position according to FIG. 3, the opening elements 31 each penetrate the severing cut 3, which is present on the upper, first tube side 2.1, whereby an opening 104 of the film tube 2 is effected.
- a separating element 41 can advantageously have guide elements 43 for guiding the film tube 2.
- the separating element 41 is designed as a knife, it can be advantageous for the film tube 2 to be guided so that one end of the severing cut 3 hits the separating element 41 when the film tube 2 is transported and the severing cut 3 is continued through the separating element 41 can.
- the guide elements 43 can be arranged in a V-shape and oriented opposite to a transport direction of the film tube 2.
- the opening sensors 33 can preferably detect that the opening elements 31 are in the active position at least in some areas below the first tube side 2.1.
- the opening elements 31 can each have an opening sensor 33 in the form of an optical sensor, by means of which an inside of the first tube side 2.1 can be recognized when the opening element 31 has moved sufficiently far between the first and second tube sides 2.1, 2.2.
- a possible opening process for opening 104 the flattened film tube 2 is also shown schematically in FIG.
- An opening element 31 of the opening device 30 penetrates through the severing cut 3 and presses against the second tube side 2.2.
- the first and second have an adhesive effect Hose side 2.1, 2.2 and there is a holding force H which can result from electrostatic attraction, for example. Due to the holding force H, the first hose side 2.1 also initially remains adhering to the second hose side 2.2 when the first hose side 2.1 is stretched by the opening element 31. By further stretching the second hose side 2.2, an stretching force D of the second hose side 2.2 is increased, at least until the stretching force D exceeds the holding force H.
- the first hose side 2.1 detaches from the second hose side 2.2 at least in some areas at the severing cut, so that the opening element 31 can get between the first and second hose sides 2.1, 2.2.
- This can result from the fact that the film tube 2 is pretensioned in the transport direction of the film tube 2, ie the two tube sides 2.1, 2.2 are under tensile stress. Therefore, the first and second tube sides 2.1, 2.2 each have a tendency to return from a stretched state in the tubular film plane 9 to return.
- a drive 42 then moves the separating elements 41 of the separating device 40 in the direction of the opening elements 31 in order to enable a separation 105 of the film tube 2 into two separate film webs 6.
- the separating device 40 with its separating elements 41 can be introduced into the film tube 1 through the opened film tube 2, the inserted state of the separating device 40 within the film tube 2 being shown in FIG. If the separating device 40 is located within the film tube 2, the flattened film tube 2 is cut into two film webs 6 at its fold lines on both sides. One film web 6 is fed to the winding point 7 and the second film web 6 is fed to the winding point 8. At the winding points 7, 8, there is in particular a winding 108 onto the film webs 6 to form windings that can be further processed and / or transported.
- the opening elements 31 are then moved into their passive position.
- the cutting device 20 also moves into its passive state when the separating device 40 is inserted inside the film tube 2 and cuts through it on both sides.
- the blown film installation 1 has a control unit 11.
- the control unit 11 be assigned to at least one of the winding points 7, 8 in order to enable a winder-controlled operation of the blown film system 1.
- the control unit 11 has, in particular, a start module 11.1 by which the cutting device 20 can be controlled as a function of the start of the blown film system 1 in order to make the severing cut 3, in particular once, in the first tube side 2.1 when the blown film system 1 is started up.
- the control unit 11 can have a wiggle module 11.2 for recognizing a wake change at at least one of the wiggle points 7, 8.
- control unit 11 can initiate the severing cut 3 by the cutting device 20 when the change of the nodule has been recognized.
- at least one severing cut 3 can be produced with each change of angle.
- control unit 11 preferably has a protocol module 11.3 for creating a digital or analog Wckel protocol.
- the Wckel protocol also makes it possible to trace the position of the severing incision 3 in the Wckel during further processing. This allows the film webs 6 to be wound up without the winding being interrupted when a tube section in which the severing cut 3 has been made reaches the winding points 7, 8.
- a drive unit 50 is provided which can have one or more deflection units 51 in the form of rollers.
- the cutting device 20 can also be positioned in the last third of the film bubble in relation to the transport direction Z.
- control unit 11 can be in communication with one or all of the drives 22, 32, 42.
- a sensor unit 12 according to FIG. 1 can be provided, which can detect material properties of the film or the severing cut 3, for example.
- the control unit 11 can control the system 10 accordingly, so that an optimized production of several film webs 6 can be carried out within the blown film installation 1.
- the cutting device 20 can be arranged downstream in the lay-flat device 5 or the lay-flat device 5.
- the blown film system 1 according to FIG. 1 can also advantageously have an auxiliary separating unit 70, as shown in FIG.
- the auxiliary separating unit 70 is arranged in front of the winding points 7, 8 in order to enable the film tube 2 to be reopened and the film webs 6 to be re-opened, especially when the blown film system 1 is started up and / or when a winding is changed at at least one of the winding points 7, 8 Divide winding points 7, 8.
- the auxiliary separating unit 70 has a further opening device 30 for further opening 106 of the film tube 2 with opening elements 31 which can be introduced into the severing cut 3 of the film tube 2, in particular lengthened by the separating device 40, in order to open the film tube 2 and the To remove film webs 6 at least partially from one another. Furthermore, the auxiliary separating unit 70 has a transverse separating means 71 by which the film tube 2 can be completely severed, ie with the first and second tube sides 2.1, 2.2, transversely to the transport direction of the film tube 2. As a result, a separation 107 of a head region of the film tube 2 lying in front of the severing cut 3 in the transport direction of the film tube 2 can take place.
- the head area can arise when the blown film system 1 is started up and in particular forms an accumulation of coherent film material.
- the film webs 6 are spaced apart from one another after passing through the auxiliary separating unit 70 and can be fed to the winding points 7, 8 in a simple manner by an operator.
- FIGS. 14 a to 14 c show exemplary advantageous cutting patterns which can be introduced into a film tube 2 by the separating device 40 in order to separate the film tube 2.
- FIG. 14a shows severing cuts 3.1 in two edge regions of the film tube 2, so that the first and second tube sides 2.1, 2.2 are each divided into a film web 6.
- FIG. 14b shows severing cuts 3.1 in a central region of the film tube 2.
- FIG. 14c also shows a possibility of separating or cutting a film tube 2, which is folded in regions, into two film webs 6.
- the blown film system 1 according to FIGS. 1 to 14 can also advantageously be operated as follows, which is described in FIGS. 15 to 40.
- the system 10, in particular the cutting device 20 and the opening device 30, can be operated in a retraction process I according to FIG. 15 to FIG. 22 or in an extension process II according to FIG. 23 to FIG.
- the system 10 here has a contact unit 60 which can be brought or moved between an active position 61 and a passive position 62.
- the separating device 40 with the two separating elements 41 is automatically transferred from a parking position P according to FIG. 15, in which the separating device 40 is at a distance from the flattened film tube 2, into an operating position B according to FIG.
- the separating elements 41 are located on the fold line 16 of the flattened film tube 2 and cause the film tube 2 to be severed so that a separate film web 6 can be fed to each winding point according to FIG.
- the mentioned retraction process I has the starting position according to FIG. 15.
- the contact unit 60 which can be operated via a drive 63, is in a passive position 62, that is, at a distance from the film tube 2, in particular from the first tube side 2.1.
- the opening device 30 is then transferred from its passive position 34 to the active position 35 shown in FIG. 17, the opening elements 31 each protruding into a severing cut 3 in the film tube 2 in the active position 35.
- the opening elements 31 have the effect that the separating device 40 with its separating elements 41 can reliably pass through the resulting opening, formed by the severing cuts 3, into the film tube 2 and can be moved. So that a reliable movement of the separating elements 41 can take place from the parking position P in the direction of the interior of the film tube 2, the contact unit 60 acts with its two contact elements 65 on the first tube side 2.1 and pushes it towards the second tube side 2.2. This creates a necessary distance created between the travel of the separating elements 41 and the film tube 2, or the first tube side 2.1.
- the cutting device 20 While the cutting device 20 is in the active state 24, two severing cuts 3 are formed, as shown for example in FIG. 17, a central region 17 of the film tube 2 being created between the two severing cuts 3.
- two side regions 18 of the film tube are formed, each side region 18 being delimited by a fold line 16 of the film tube and the facing severing cut 3.
- the contact unit 60 Via the drive 63, the contact unit 60 is transferred from its passive position 62 according to FIG. 16 into its active position 61, which is shown in FIG. 17 and FIG.
- the separating device 40 is transferred from its parking position P from FIG. 17 to a central position M according to FIG. 18.
- the central position M the separating device 40 is at least partially in the central area 17 within the film tube 2, with the opening device 13 still in place is in the active position 35.
- the contact unit 60 acts with one contact element 65 on a side area 18 of the film tube 2.
- the central area 17 of the film tube 2 remains unaffected by the contact unit 60.
- the opening device 30 is first transferred from its active position 35 to the passive position 34, which is shown in FIG. Subsequently or in parallel with this, the contact unit 60 can be transferred from its active position 61 to its passive position 62, which is shown in FIG.
- the cutting device 20 is transferred from its active state 24 to the passive state 25, so that the film tube 2 no longer has any severing cuts 3.
- the separating device 40 can move from its central position M into the operating position B, which is shown in FIG. 21 and FIG. In FIG. 22, the cutting device 40 assumes its operating position B, in which it makes a severing cut on the folding line 16 so that a film web 6 is fed to each winding point according to FIG.
- the contact unit 60 is arranged and / or supported on a frame 64, the frame 64 also being used as a Fastening means for the separating device 40 and / or the opening device 30 can act.
- the separating device 40 can be moved into the respective position via a linear rail system which is connected to the frame 64.
- the opening device 30 and the contact unit 60 can be moved into their respective positions or positions via a common drive 63.
- the contact elements 65 of the contact unit 60 can, for. B. be designed as elongated bars that run transversely to the Z transport direction.
- a deflection roller which is primarily used for transporting the film tube 2, acts as a contact unit 60, which can be brought into its active or passive position 61, 62 depending on the retraction process I or extension process II.
- the extension process II according to the invention is shown, which automatically transfers the separating device 40 from the operating position B, which is shown in FIG. 23, to the parking position P according to FIG.
- the film tube 2 is severed at its two fold lines 16.
- the cutting device 20 is first transferred to the active state 25, so that two severing cuts 3 on the first hose side 2.1 of the The film tube 2 takes place, which is shown in FIG.
- the opening device 30 is transferred from the passive position 34 to the active position 35, the opening elements 31 each protruding into a severing cut 3 in the film tube 2.
- the contact unit 60 is transferred from the passive position 62 to the active position 61.
- the movement of the opening device 30 is coupled with the movement of the contact unit 60 in this embodiment, since both elements 30, 60 are arranged on a common frame or at least mechanically are in operative connection.
- the separating elements 41 leave their operating position B and move in the direction of the central position M, which is reached in FIG.
- the opening device 30 is transferred from the active position 35 to the passive position 34, and the contact unit 60 is moved from the active position 61 to the passive position 62.
- the cutting device 20 is also transferred from the active state 24 to the passive state 25.
- FIG. 31 to FIG. 40 now show an exemplary embodiment in order to counteract an incident in the production of the film webs 6.
- one of the two separating elements 40 which can in particular be designed as a knife, can fail, in particular move unintentionally from its operating position B into a parking position P.
- the causes for this can be of various kinds.
- a detection means 90 is provided for this, which can effectively detect this incident. So that there is no complete loss of production, an additional cutting device 80 is provided, which is activated in the aforementioned malfunction in order to be transferred from a rest mode 82 to an operating mode 81 by the additional cutting device 80 making an auxiliary cut 83 through both hose sides 2.1, 2.2. of the film tube 2 introduces.
- the additional cutting device 80 is connected to a drive 84.
- the additional cutting device 80 is activated as a function of the detection means 90, it being possible to detect, for example, a pressure sensor, position sensor, optical sensor, to what extent a fault of the type mentioned is present. The worker can also manually control the additional cutting device 80.
- FIG. 33 it is shown schematically that the defective separating element 41 has been replaced by a functioning separating element 41, whereby the inventive retraction process I can now be carried out automatically for the separating element 41 on the left in FIG. 33:
- the cutting device 20 is transferred to the active one State 24, so that two severing cuts 3 are made on the first tube side 2.1 of the film tube. It is also conceivable that only one severing cut 3 is made, which preferably faces the disturbed severing element 41. This means that only the left severing cut 3 would also suffice for the running-in process I.
- the opening device 30 (not explicitly shown) is then activated according to FIGS. 34-40 in order to transfer it to the active position 35 so that the left separating element 41 can be reliably inserted into the film tube 2.
- the contact unit 60 which is not explicitly shown, is also provided here its passive position 62 is brought into its active position 61 in order to bring about a reliable movement of the separating element 41 into the central position M according to FIG.
- the cutting device 20 is transferred to the passive state 25, so that no more severing cut 3 is made. Then follow the steps:
- the cutting device 20, the opening device 30, the separating device 40, the contact unit 60, the additional cutting device 80 can be controlled via separate control units or via a common control unit 11 according to FIG. 8.
- the detection means 90 can also be connected to the control unit 11 for signaling purposes.
- the detection means 90 and the additional cutting device 80 can also be attached to the frame 64 mentioned. Alternatively, separate fastening points independent of the frame 64 are conceivable.
- the contact unit 60 in its active position 61 can act without contact on the laid-flat film tube 2, in particular on the side area 18 of the film tube 2, both for the described retraction process I and for the extension process II, so that all the exemplary embodiments also apply to these Alternative are applicable.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Replacement Of Web Rolls (AREA)
- Making Paper Articles (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019108344 | 2019-03-29 | ||
| DE102019127454.0A DE102019127454B4 (de) | 2019-03-29 | 2019-10-11 | System zur verbesserten Einführung einer Trennvorrichtung sowie Blasfolienanlage sowie Verfahren zur Herstellung und Bereitstellung von zumindest zwei Folienbahnen aus Kunststoff in einer Blasfolienanlage |
| PCT/EP2020/058852 WO2020201155A2 (de) | 2019-03-29 | 2020-03-27 | System zur verbesserten einführung einer trennvorrichtung sowie blasfolienanlage sowie verfahren zur herstellung und bereitstellung von zumindest zwei folienbahnen aus kunststoff in einer blasfolienanlage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3946885A2 true EP3946885A2 (de) | 2022-02-09 |
Family
ID=72612250
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20715364.4A Pending EP3946885A2 (de) | 2019-03-29 | 2020-03-27 | System zur verbesserten einführung einer trennvorrichtung sowie blasfolienanlage sowie verfahren zur herstellung und bereitstellung von zumindest zwei folienbahnen aus kunststoff in einer blasfolienanlage |
| EP20716428.6A Pending EP3946886A2 (de) | 2019-03-29 | 2020-03-30 | Transportieren eines folienschlauches, blasfolienanlage sowie verfahren zur herstellung einer folie |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20716428.6A Pending EP3946886A2 (de) | 2019-03-29 | 2020-03-30 | Transportieren eines folienschlauches, blasfolienanlage sowie verfahren zur herstellung einer folie |
Country Status (5)
| Country | Link |
|---|---|
| US (2) | US12064910B2 (de) |
| EP (2) | EP3946885A2 (de) |
| CN (2) | CN113905861B (de) |
| DE (2) | DE102019127454B4 (de) |
| WO (2) | WO2020201155A2 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021219734A1 (de) * | 2020-04-28 | 2021-11-04 | Windmöller & Hölscher Kg | Blasenformerkennung in einer blasenfolienanlage |
| US12106179B2 (en) * | 2020-12-17 | 2024-10-01 | International Business Machines Corporation | Measurement aggregation in quantum programs |
| DE102021124559A1 (de) | 2021-09-22 | 2023-03-23 | Decatex srl - costruzioni meccaniche | Vorrichtung und Verfahren zum Entlüften einer flachgelegten Schlauchfolie |
| CN114643688B (zh) * | 2022-02-23 | 2023-06-02 | 河北誉宏包装装潢有限公司 | 一种塑料粒子加热融化用成型吹膜装置及使用方法 |
| CN116811085B (zh) * | 2023-06-06 | 2024-02-20 | 广东汇发塑业科技有限公司 | 一种多层共挤吹膜机的运行状态实时评估方法 |
| CN117183302B (zh) * | 2023-09-10 | 2024-04-16 | 苏州鸿科新材料科技有限公司 | 一种离型膜生产用吹膜机 |
Family Cites Families (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2757495A (en) | 1950-09-06 | 1956-08-07 | American Viscose Corp | Process for the production of stuffed products |
| US3009200A (en) * | 1956-07-31 | 1961-11-21 | Lonza Electric & Chem Works | Extrusion arrangement for producing foils |
| US3157560A (en) * | 1960-12-22 | 1964-11-17 | Continental Can Co | Method and apparatus for making laminate structures and product thereof |
| US3231651A (en) | 1961-01-03 | 1966-01-25 | Dow Chemical Co | Plastic film windup apparatus |
| JPS4817868B1 (de) * | 1964-07-14 | 1973-06-01 | ||
| US3574806A (en) * | 1967-09-07 | 1971-04-13 | Gulf Oil Corp | Method for producing flattened sheeting or flattened tubing of molten thermoplastic resins circumferential chill casting |
| DE2128534C3 (de) * | 1971-06-08 | 1974-01-24 | Windmoeller & Hoelscher, 4540 Lengerich | Vorrichtung zum Auftrennen flachgelegter nahtloser Kunststoffolienschläuche |
| US3909176A (en) * | 1971-12-17 | 1975-09-30 | Pirelli | Device for the manufacture of bands reinforced with longitudinal wires |
| GB2019306B (en) | 1978-04-21 | 1982-11-10 | Mengeot P | Controlling blown film width |
| US4242295A (en) * | 1978-10-04 | 1980-12-30 | Du Pont Canada Inc. | Process for manufacturing flat plastic net |
| US4484971A (en) | 1982-06-24 | 1984-11-27 | General Binding Corporation | Method and apparatus for making improved laminating film |
| US5073617A (en) | 1989-01-03 | 1991-12-17 | The Dow Chemical Company | Barrier film and process for making |
| FR2658118B1 (fr) | 1990-02-09 | 1992-06-12 | Plateau Bernard | Machine pour la fabrication de coussins d'air sacs sachets en matiere thermoplastique et permettant l'ensachement. |
| AT393648B (de) | 1990-02-15 | 1991-11-25 | Chemiefaser Lenzing Ag | Folienstreckanlage |
| US5789042A (en) * | 1995-03-28 | 1998-08-04 | Hoechst Celanese Corporation | Thin LCP film process |
| FR2759620B1 (fr) | 1997-02-20 | 1999-05-07 | Tecnimodern Automation Sa | Dispositif de coupe precise d'un materiau en feuille mince |
| JP3858390B2 (ja) * | 1997-10-31 | 2006-12-13 | チッソ株式会社 | 農業用ポリオレフィン系フィルムの開反方法 |
| JPH11129316A (ja) * | 1997-11-04 | 1999-05-18 | Chisso Corp | 農業用フィルムおよびその剥離性改善方法 |
| US6068462A (en) * | 1997-12-02 | 2000-05-30 | Brampton Engineering, Inc. | Apparatus for continuously forming a blown film |
| DE10243959B4 (de) | 2002-09-20 | 2007-11-29 | Windmöller & Hölscher Kg | Vorrichtung zur Herstellung von Folienbahnen aus einem Folienschlauch |
| JP3710800B2 (ja) * | 2003-01-31 | 2005-10-26 | 住友ベークライト株式会社 | 管状樹脂フィルムの製造装置および製造方法 |
| DE202004013959U1 (de) * | 2004-09-05 | 2006-01-19 | Haver & Boecker | Schlauchfolie und Vorrichtung zur Verbindung zweier Enden von Schlauchfolien |
| DE202004017249U1 (de) * | 2004-11-04 | 2006-03-16 | Haver & Boecker | Vorrichtung zur kontinuierlichen Verarbeitung von Seitenfaltenschlauchfolien |
| DE102005018548A1 (de) * | 2005-04-20 | 2006-11-02 | Windmöller & Hölscher Kg | Verfahren zur Herstellung von wiederholt zu öffnenden und zu schließenden Beuteln oder Säcken |
| CN201287454Y (zh) * | 2008-10-09 | 2009-08-12 | 江苏通用科技股份有限公司 | 胎面挤出机用胎侧胶边自动去除装置 |
| CN102009473A (zh) | 2009-09-06 | 2011-04-13 | 李小龙 | 塑料薄膜生产方法及一种塑料薄膜 |
| KR101286755B1 (ko) | 2012-02-16 | 2013-07-16 | (주) 세진케미칼 | 수박 재배용 멀칭 필름 |
| CN203697435U (zh) * | 2013-06-09 | 2014-07-09 | 东莞市天桉硅胶科技有限公司 | 硅橡胶切割挤出机 |
| CN203752474U (zh) * | 2014-02-26 | 2014-08-06 | 杜肯(武汉)绝热材料有限公司 | 一种橡塑管材挤出模具的剖口装置 |
| KR102270352B1 (ko) * | 2014-10-10 | 2021-06-30 | 스미또모 가가꾸 가부시키가이샤 | 세퍼레이터 원단의 제조 방법, 세퍼레이터의 제조 방법, 세퍼레이터 원단, 및 세퍼레이터 원단 제조 장치 |
| CN104908284A (zh) * | 2015-06-09 | 2015-09-16 | 无锡佳泰科技有限公司 | 一种薄膜加工装置 |
| DE102016119281A1 (de) | 2016-10-11 | 2018-04-12 | Windmöller & Hölscher Kg | Trennvorrichtung für das Auftrennen eines schlauchförmigen Flachmaterials, System sowie Trennverfahren |
| CN206406100U (zh) * | 2016-10-26 | 2017-08-15 | 天津登峰卫生用品材料有限公司 | 一种薄膜分切机 |
| JP6501366B2 (ja) * | 2016-12-08 | 2019-04-17 | 株式会社Fts | パリソン移送装置 |
| CN206665772U (zh) | 2017-03-23 | 2017-11-24 | 北京嘉德福塑料制品有限公司 | 吹膜机 |
| CN207481167U (zh) * | 2017-10-27 | 2018-06-12 | 广东德旭绝热材料有限公司 | 一种保温材料的螺杆挤出和余料回收装置 |
-
2019
- 2019-10-11 DE DE102019127454.0A patent/DE102019127454B4/de active Active
- 2019-10-11 DE DE102019127455.9A patent/DE102019127455A1/de active Pending
-
2020
- 2020-03-27 US US17/599,824 patent/US12064910B2/en active Active
- 2020-03-27 EP EP20715364.4A patent/EP3946885A2/de active Pending
- 2020-03-27 WO PCT/EP2020/058852 patent/WO2020201155A2/de not_active Ceased
- 2020-03-27 CN CN202080038711.1A patent/CN113905861B/zh active Active
- 2020-03-30 CN CN202080026403.7A patent/CN113677500A/zh active Pending
- 2020-03-30 US US17/599,591 patent/US12370732B2/en active Active
- 2020-03-30 WO PCT/EP2020/058990 patent/WO2020201225A2/de not_active Ceased
- 2020-03-30 EP EP20716428.6A patent/EP3946886A2/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US12064910B2 (en) | 2024-08-20 |
| CN113905861B (zh) | 2024-03-26 |
| WO2020201225A3 (de) | 2020-11-26 |
| WO2020201155A2 (de) | 2020-10-08 |
| US20220193974A1 (en) | 2022-06-23 |
| WO2020201155A3 (de) | 2020-11-26 |
| WO2020201225A2 (de) | 2020-10-08 |
| DE102019127454A1 (de) | 2020-10-01 |
| CN113677500A (zh) | 2021-11-19 |
| CN113905861A (zh) | 2022-01-07 |
| DE102019127455A1 (de) | 2020-10-01 |
| US20220193973A1 (en) | 2022-06-23 |
| US12370732B2 (en) | 2025-07-29 |
| EP3946886A2 (de) | 2022-02-09 |
| DE102019127454B4 (de) | 2023-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE102019127454B4 (de) | System zur verbesserten Einführung einer Trennvorrichtung sowie Blasfolienanlage sowie Verfahren zur Herstellung und Bereitstellung von zumindest zwei Folienbahnen aus Kunststoff in einer Blasfolienanlage | |
| EP2952330B1 (de) | Blasfolienanlage und verfahren zum herstellen einer blasfolienbahn | |
| EP3180251B1 (de) | Verfahren und vorrichtung zum aufbringen einer schrumpffolienhülse | |
| DE2229497A1 (de) | Verfahren und Vorrichtung zum Fordern von flachenhaftem Gut | |
| EP4041526A1 (de) | Verfahren zum starten oder beenden einer folienproduktion in einer folienmaschine, folienmaschine und computerprogrammprodukt | |
| WO2015055170A9 (de) | Verfahren zum herstellen einer blasfolienbahn sowie blasfolienanlage | |
| EP2985257B1 (de) | Vorrichtung und verfahren zum aufbringen einer schrumpffolienhülse | |
| EP0996531A1 (de) | Vorrichtung und verfahren zur herstellung von kunststoffhohlkörpern | |
| EP1930162B1 (de) | Vorrichtungen und Verfahren zum Einziehen mindestens einer Materialbahn bzw. von mindestens einem Bahnstrang in einen Falzapparat | |
| EP4041524A1 (de) | Blasfolienanlage und verfahren zur herstellung von folienschläuchen oder folienbahnen | |
| EP3737630B1 (de) | Vorrichtung zum schneiden einer materialbahn in einzelne bögen mit einem bahnspeicher | |
| EP3525995B1 (de) | Trennvorrichtung für das auftrennen eines schlauchförmigen flachmaterials, system sowie trennverfahren | |
| EP4045272B1 (de) | Vorrichtung zur herstellung von inline gereckten schlauchfolien im blasverfahren | |
| EP4045271B1 (de) | Verbindungs-, trenneinheit für folienbahnen | |
| WO2013026888A1 (de) | Vorrichtung und verfahren zum herstellen von tubenkörpern | |
| EP4045270A1 (de) | Blasfolienanlage und verfahren zur herstellung einer folienbahn | |
| DE102024128643A1 (de) | Vorrichtung und ein Verfahren zur Herstellung einer Folienbahn | |
| EP4155053A1 (de) | Vorrichtung und verfahren zum entlüften einer flachgelegten schlauchfolie | |
| WO2022161584A1 (de) | Blasfolienanlage und verfahren zum betreiben einer blasfolienanlage | |
| DE102015012653A1 (de) | Wickelstation für eine Folienextrusionsanlage, Folienextrusionsanlage und Verfahren zum Betreiben einer Folienextrusionsanlage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20211029 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20240305 |
|
| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: WINDMOELLER & HOELSCHER SE & CO. KG |