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Description
The "TF-Station" is installed between the prefolding and folding stations of a folding box gluer. Equipment:
First Chain Squaring station
Two conveyor chains adjustable in the length direction. Setting in the cross direction by means of spindles. Quick change driver blocks as well as centralized lift-off for top guiding bars facilitate set-up. The station includes a Hot-Melt unit with one gluing nozzle.
Vacuum Belt Transport Station
Following the squaring unit, the blanks are taken over by rubber rollers, and are transferred by vacuum belts to the stencil gluing station, the applicating cylinder and finally into the second squaring station. Thanks to this system, neither lateral nor top guides are required, thus reducing changeover times.
The suction air is generated by separate suction pumps mounted at the side of the machine. The suction air can be controlled for each belt (depending on blank size and shape).
Gluing Station
A two-cylinder gluing system, with micro setting for the metering roller, facilitates the use of special glues if required. An automatic glue refill-system with spare tank and glue pump is included.
The stencil cylinder, with precise height adjustment, applies the glue to the carton blank which is supported by vacuum belts. This provides a very accurate glue application.
If one or several blanks are missing, the vacuum belts lower automatically, in order to avoid glue application to the belts.
To set the stencil cylinder in the running direction, there is an adjustment by means of a hand wheel. In the cross direction, it is set by spindles with a hand wheel. Even during machine operation the stencil position can be modified to guarantee precise glue application.
A separate drive keeps the glue rollers turning in case of a machine stop. The drive engages and disengages automatically, when the machine stops and re-starts again.
The gluing stencils can be prepared on a separate stencil preparation table off-machine (see options), which is provided with a scale. The stencils are then glued onto a stencil blanket and the complete mounted stencil clamped onto the stencil cylinder. At the end of a production run, the mounted stencil can be taken off and stored for future use.
Tube Forming Station
The tube is formed by means of exchangeable profiled formers, each former adjustable within a certain range.
5 formers are included and cover the full range.
The tube width can be adjusted while the machine is running.
The sealing jaws are automatically lowered during machine operation, and lifted during machine stops.
The temperature of the sealing jaws is electronically controlled.
The cross cutter and the application cylinder are both provided with suction and blower air control to ensure transport and accurate application of the tube material. Even during machine operation, the cut-off length of the tube can be set steplessly from minimum to maximum by means of a special gear.
The position of the tube in relation to the blank is steplessly adjustable in the running direction, by a servo motor, and in the lateral direction, by a hand wheel, without stopping the machine. This means that after size changes the positioning of the tube and carton blank can easily be carried out in a minimum of time.
On request, further control devices can be supplied, for example for missing tube material on the blanks or for the end of reel, as well as a control unit for tube length and tube position. (See options)
Chain Squaring Unit
Two conveyor chains are adjustable both in the length direction, by quick change driver blocks for precise positioning, and in the cross direction, by means of spindles. The chains run in plastic guides. The top guide bars can be lifted together to facilitate set up.
All designs are subject to alterations.
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