DE19601668A1 - Rotary and rotating plate type winding machines for spiral film wrapping of loaded pallets - Google Patents

Abstract

A rotary type film winding machine for wrapping film strip(15) around loaded pallets(6) comprises a machine frame with a winding rotor on a vertical axis carrying a vertical moving film slide at the end of a rotor arm extending down the side of a pallet. An interchangeable first film roll(16) is carried on the slide and passes via a take-off roll(21) to the pallet(6). A fully automatic system(A) for feeding of a new film strip(24) to the rear end of the old film strip(15) includes a film cutting unit(19) through which the film strip(15) passes, located together with a sealing station(20), between the first film roll(16) and the take-off roll(21). A holder(26) at the sealing station(20) grips the start of a new film strip(24) from a second film roll(17) carried on the slide) while connection is made to the rear end of the first film(15). A rotating plate version of the machine employing the same fully automatic feed system(A) for a new film strip comprises a machine frame supporting a powered rotating plate on a vertical axis carrying a pallet(6) and a film slide and film rolls moving up and down on the machine frame. The film slide carries a second film roll(17) and similar cutting, film holding and sealing equipment to the rotary type machine between the first film roll(16) and the take-off roll(21).

Description

The invention relates to a film winding machine for wrapping of pallets loaded with packaged goods with a flat film strip, ent speaking the preamble of claim 1 and 2.

Under the designation "flat film strips" are part of the present ing invention film webs between about 100 and 500 mm in width understood thermoplastics, which are preferably either elas stretchable table (stretch film) or shrinkable by the action of heat (Shrink or thermal film). The film wrap according to the invention machine can also be used for wrapping loaded pallets with a other flat strips made of paper, fabric, fleece etc. are used, as far as the tensile strength of such materials for this wrapping method suitable is.

Film winding machines of the generic type are then used as turntables machines, if they have the loaded load that is temporarily stationary Pallet is on a rotating plate. When turning the plate the packaged goods are guided past a fixed film roll, which is the packaged goods with the film strip, for example, in spiral, overlapping Wrapped in turns.

Fig. 1 shows a simplified view of a turntable machine for producing a film cover for loaded pallets. The method according to the invention is then carried out.

Film winding machines of the generic type are then called Rotor machines referred to when the temporarily standing loaded pallet is encircled by a rotor arm of the film winding machine, which the Carries flat film in the form of a winding roll. When circling the standing The pallet becomes its packaged goods with the flat that unwinds from the winding roll Film strips, for example, in spiral, overlapping turns wrapped around.

Fig. 2 shows a simplified view of a rotor machine for producing a film envelope for loaded pallets. The method according to the invention is also carried out thereon.

This winding process can be largely automated; the necessary Role change must be carried out by an operator and represents an interruption in the automatic operation of the machine. It is particularly disruptive if a roll change occurs during a winding process a pallet must be executed. A timely change of roles is only possible if it is detected by a special sensor device that the film roll is almost is used up.

The object of the invention is therefore, film winding machines of both types to be designed so that an automatic operating sequence over longer periods of time is made possible, which is not due to the consumption of a single roll of film is true. This is intended to increase the degree of automation of the film winding machine can be achieved.

This object is achieved in that z. Legs second film roll is rotatably mounted that between the first film roll and the Drain roller a film cutting device passed through the film web and one Sealing station are arranged, and that the sealing station is a holding device for the beginning of the film web of the second film roll. But it can also be a choice a new full role can be fed and sealed from an external position.  

The period of time in which an uninterrupted automated operation is possible, is doubled by arranging a second film roll on the film carriage. After the first film roll has been used up, it is ready in the holding device held the beginning of the film web of the second roll in the sealing station on the films The first roll is sealed and the remaining film of the first roll is cut off. Then the winding process can be carried out without interrupting the running film web continue until the second roll of film is used up.

Advantageous refinements of the inventive concept are the subject of Subclaims.

Three embodiment variants of the invention are explained in more detail below are shown in the drawings.

It shows:

Fig. 1 is a simplified side view of a film winding machine in the form of a turntable machine.

Fig. 2 is a simplified side view of a film winding machine in the form of a rotor machine.

Fig. 3 is an enlarged fragmentary section taken along line AA in Fig. 2, where two rolls of film are arranged on the slide carriage in this variant (A),

Fig. 4 shows the variant (B) of a further film roll fed from the outside, this is done manually.

Fig. 5 shows in plan view the variant (C) with externally supplied further film rolls, this takes place fully automatically from a roll magazine.

Fig. 6 shows a side view of the variant (C) in the sequence as shown in Fig. 5
The film winding machine of the turntable machine type shown in FIG. 1 as a greatly simplified representation has a turntable ( 1 ), which receives the loaded pallet ( 6 ). The plate can be driven by a rotary drive around the vertical axis of rotation ( 2 ). On the tower ( 3 ), the film carriage ( 5 ) with the Wickelvor direction ( 4 ) and the film roll ( 7 ) can be moved vertically. The film pulled off in the form of a flat band from the film roll ( 7 ) is wound around the loaded pallet when the turntable ( 1 ) rotates. While the film carriage ( 5 ) is moved vertically along the tower ( 3 ), the windings of the film band ( 15 ) are placed in a spiral around the pallet ( 6 ).

The film winding machine of the rotor machine type shown in FIG. 2 as a greatly simplified representation has a machine frame ( 10 ) in which a winding rotor ( 11 ) with a vertical axis of rotation ( 12 ) is rotatably and drivably mounted. On a rotor arm ( 13 ) projecting downwards, the winding rotor ( 11 ) carries a foil slide ( 14 ) and a foil roller ( 7 ) which is moved vertically along the rotor arm ( 13 ). In this way, a film envelope is created which consists of overlapping, spiral turns of the film web ( 15 ) and envelops the pallet ( 6 ).

Fig. 3 shows that a first film roll ( 16 ) and a second film roll ( 17 ) are rotatably mounted on the film slide ( 14 ). The two film rolls ( 16 ) and ( 17 ) are seen in the direction of rotation of the rotor arm ( 13 ), arranged in front of and behind the rotor arm. This arrangement is transferable to Fig. 1 for the turntable machine with the film slide ( 5 ) as a carrier of the film rolls ( 16 and 17 ).

The film web ( 15 ) runs from the first film roll ( 16 ) and the deflection rollers ( 27 ) through a film cutting device ( 19 ) and a sealing unit ( 20 ) to a discharge roller ( 21 ) and from there in the direction of the arrow ( 22 ) wrapping pallet ( 6 ).

The film web ( 24 ) drawn off from the second film roll ( 17 ) is guided over deflection rolls ( 25 ) around the carriage to the sealing station ( 20 ). There the beginning of the film web ( 24 ) is held by a holding device ( 26 ) which holds the film web ( 24 ), for example as a clamp holding the beginning of the film web ( 24 ) or as a vacuum roller.

As soon as a sensor indicates that the first film roll ( 16 ) is almost completely used up, only the ongoing winding process for a pallet ( 6 ) is carried out. Then the drive of the winding rotor ( 11 ) is stopped or the turntable ( 1 ) is stopped. The pallet ( 6 ) leaves the machine.

The beginning of the film web ( 24 ) of the second film roll ( 17 ) held ready in the sealing unit ( 20 ) and in the holding device ( 26 ) is welded to the film web ( 15 ) of the film roll ( 16 ) by actuating the sealing unit ( 20 ). Then the film cutting device ( 19 ) cuts through the film web ( 15 ). After a new pallet ( 6 ) to be wrapped has entered the machine, the next wrapping process begins. The cutting off of the film web after the end of a winding process and the holding of the beginning of the film web and the application of the first turn to the pallet are known operations of such film winding machines, which are therefore not described.

With the described embodiment, a considerable increase in the time span between manual reel changes is achieved, so that the degree of automation is significantly increased. If, for example, two film rolls ( 16 ) and ( 17 ) are used, each with approximately 2000 m of film web and if each pallet ( 6 ) to be wrapped requires approximately 50 m of film, then there is an uninterrupted performance of approximately 65 pallets per hour automated operation of the winding machine of almost 3 hours.

Fig. 4 shows that a first film roll ( 30 ) is rotatably mounted on the film carriage. The film web ( 15 ) runs from the film roll ( 30 ) through a film cutting device ( 31 ), a sealing unit ( 36 ) and a discharge roller combination ( 33 ) to the pallet ( 6 ) to be wrapped. As soon as the sensor ( 37 ) has indicated that the film roll ( 30 ) is almost completely used up, only the ongoing winding process for a pallet is carried out. Then the drive of the winding rotor ( 11 ) on the rotor machine is stopped or the turntable ( 1 ) on the turntable machine is stopped. The pallet ( 6 ) leaves the machine. The end of the film roll ( 30 ) held ready in the sealing unit ( 32 ) and the holding device ( 36 ) is separated and held in place by the film cutting device ( 31 ) from the empty film roll ( 30 ).

The operator manually takes the almost empty core sleeve ( 34 ) of the film roll ( 30 ) from the holding mandrel ( 35 ) and puts a new full film roll ( 30 ) on the mandrel. The new beginning of the film is placed manually on the holding device ( 36 ) and connected via the sealing unit ( 32 ) to the end of the film web ( 15 ) located in the holding device ( 36 ).

After a new pallet to be wrapped has entered the machine, begins the next wrapping process. The cutting of the film web after finishing a Winding process and holding the start of the film web and putting on the first Winding on the pallet are known operations of such winding machines that therefore not be described.  

Fig. 5 shows a device for film rolls fed fully automatically from the outside in a highly simplified representation as a top view.

The film web ( 15 ) runs from the first film roll ( 50 ) through a film cutting device ( 51 ) and a holding device ( 52 ) to a discharge roller ( 53 ) and from there through the film carriage in the direction of arrow ( 22 ) to the pallet to be wrapped ( 6 ). As soon as the sensor ( 54 ) has indicated that the film roll ( 50 ) is almost completely used up, only the ongoing winding process for the pallet is carried out. Then the drive of the winding rotor is stopped in rotor machines or the turntable in turntable machines is stopped. The pallet leaves the machine. The end of the film roll ( 50 ) held ready in the sealing unit ( 55 ) and the holding device ( 52 ) is separated and held by the empty film roll ( 50 ) via the film cutting device ( 51 ). The handling unit ( 66 ) brings a new film roll from the magazine to the film carriage and connects the beginning of a new film roll ( 63 ) with the end of the empty film roll to form a continuous film web ( 15 ).

Fig. 6 shows this feed unit in a highly simplified form as Seitenan view.

A magazine in the form of a turntable or conveyor belt ( 60 ) takes up a certain number of full film rolls ( 61 ) depending on the diameter. The number can range from at least one to about 12 rolls.

The new rolls are removed from their packaging beforehand and individually attached to mandrels ( 62 ). The respective top foil (63) for manually holding devices (64). B. attached by clamps. The turntable ( 60 ) automatically rotates fully into the removal position ( 65 ) of the handling unit ( 66 ). A robot ( 67 ) moves back and forth between the film carriage ( 14 ) of the winding machine and the removal point ( 65 ). The robot is used to feed new, full rolls of film and to dispose of the empty core sleeves ( 57 ). The robot ( 67 ) moves with its horizontal slide ( 74 ) to change the film rolls into its left end position ( 69 ) directly above the roll holder on the film slide. The vertical slide ( 70 ) of the robot ( 67 ) moves into the empty core sleeve ( 57 ), clamps the core sleeve ( 57 ) tightly via the gripper ( 71 ) and pulls the core sleeve ( 57 Fig. 5) with its vertical movement ( 70 ) from the receiving dome ( 72 ) of the foil slide ( 14 ). The gripper ( 71 ) moves the robot ( 67 ) horizontally over the empty box ( 73 ), then down over the vertical part ( 70 ) and throws the empty core sleeve ( 57 ) into the box. The robot ( 67 ) moves with the horizontal movement ( 74 ) to the magazine ( 60 ) and moves with its movement ( 70 ) down into the core sleeve ( 57 ) of the new, full film roll that is ready at the transfer point ( 65 ). The gripper ( 71 ) clamps in the core sleeve and pulls the new roll out of the clamping device ( 64 ) upwards out of the magazine ( 60 ). The horizontal part of the robot ( 67 ) moves to the machine in the end position ( 69 ), then with the vertical movement of the robot ( 70 ) to the holding mandrel ( 72 ) of the film slide. The gripper ( 58 ) takes over the beginning of the film web of the new film roll, presses it against the holding device ( 52 ), and the sealing unit ( 55 ) connects the end of the running film web ( 15 ) to the beginning of the new film roll ( 63 ). The cutting device ( 51 ) separates the current film roll from the empty core sleeve. The gripper ( 71 ) moves with the vertical movement ( 70 ) of the robot ( 67 ) out of the core sleeve of the new film roll and out of the winding machine area into a waiting position. After a new pallet to be wrapped has entered the machine, the next wrapping process begins. The cutting of the film web after completion of a winding process and holding the beginning of the film web and applying the first turn to the pallet are known workflows of such film winding machines, which are therefore not described.

The drawings show the film winding machine and its essential here Individual devices in different reduction scales.

Claims (5)

1. Foil winding machine for wrapping loaded pallets ( 6 ) with a foil web ( 15 ), consisting of:
a winding rotor ( 11 ), which is mounted in a machine frame and can be driven about a vertical axis of rotation, which carries a vertically moving film carriage ( 14 ) on a rotor arm ( 13 ) projecting downwards, on which at least one exchangeable first film roll ( 16 ) is rotatably supported which runs the film web ( 15 ) to a discharge roller and from there to the pallet, characterized in that a second film roll ( 17 ) is rotatably mounted on the film slide ( 14 ), that between the first film roll ( 16 ) and the discharge roller ( 21 ) from the film web ( 15 ) through film cutting device ( 19 ) and a sealing station ( 20 ) are arranged, and that the sealing station ( 20 ) has a holding device ( 26 ) for the beginning of the film web ( 24 ) of the second film roll ( 17 ). 2. Foil winding machine for wrapping loaded pallets ( 6 ) with a foil web, ( 15 ) consisting of:
a stored in a machine frame, about a vertical axis of rotation bar turnable ( 1 ), standing, rotating pallet ( 6 ) and a foil carriage ( 5 ) and on the machine frame ( 3 ) vertically up and down moving film roll, characterized in that on film tension a second film roll (17) is rotatably supported, that a distance traveled by the web of film (15) film cutting device (19) and a Ansiegelstation (20) are arranged between the first film roll (16) and the process roller (21), and that the Ansiegelstation ( 20 ) has a holding device ( 26 ) for the beginning of the film web ( 24 ) of the second film roll ( 17 ). 3. Film winding machine according to claim 1 and 2, characterized in that a new film roll ( 30 ) is manually inserted onto the holding mandrel ( 35 ) and the beginning thereof with the end of the film web ( 15 ) via the cutting device ( 31 ), the sealing unit ( 32 ) and the holding device ( 36 ) is connected. 4. Film winding machine according to claim 1 and 2, characterized in that a new film roll from a magazine ( 60 ) via the removal position ( 65 ), the handling unit ( 66 ), the robot ( 67 ) with the movement units ( 70 and 74 ) and the Gripper ( 71 ) is brought onto the holding mandrel ( 72 ) on the foil slide of the winding machine, that the new film start ( 63 ) is connected to the running film web ( 15 ) via the holding device ( 52 ), the sealing unit ( 55 ) and the cutting device ( 51 )
that a certain number of full film rolls of at least one roll are available on the magazine ( 60 ) depending on the diameter and are each brought to the removal position ( 65 )
that these new film rolls are brought into their own clamping device ( 64 ) ge
that a handling unit ( 66 ) with robot ( 67 ) moves horizontally ( 74 ) and vertically ( 70 ), a gripper ( 71 ) fetches the empty core sleeve ( 57 ) from the holding mandrel ( 72 ) of the foil slide of the winding machine and into the empty box ( 73 ) passes
that a gripper ( 58 ) takes the respective film start ( 63 ) from the clamping devices ( 64 ) and connects it with the sealing unit ( 55 ), the holding device ( 52 ) and the cutting device ( 51 ) with the running film web ( 15 ).