The machine combines and synchronizes three different and independent phases: the preparation of the tubular film, transfer and opening of tubular film, hooding and heat shrinking- merging them together in a single process minimizing the downtime of various devices, providing exceptional levels of productivity (up to 140 packages per hour). The system for gripping and handling the tubular film is independent from the heat shrinking system: hence, the heat shrinking phase not interferes with the gripping phase, ensuring maximum reliability in terms of wear resistance of the components and wires. The lower extremity of the hood, driven internally by 4 grippers is tensioned and driven to the bottom of the package to assure a strong grip, simple and efficient, and to take advantage of the tubular film sizes, resulting in material savings. The burners have been designed to provide a constant heat and to guarantee a soft and uniform heat treatment of the hoods, enabling even the use of the thinnest films.
Moreover, the flame is lightened up only when the heat shrinking is required; therefore, it is more energy efficient than traditional ovens. Ergonomics is behind the project. The reel holder, considered standard up to 3 rolls , thanks to the positioning on a movable carriage , allows a fast, easy and safe access from the ground for reel loading. The combustion air distribution system inside the burner ensures optimum combustion without emission of unburnt gases in the environment. In the absence of flame, the automatic detection device interrupts the gas supply.
|Suitable film:||Heat shrinkable polyethylene film with a thickness from 80 to 160 microns|
|Maximum outside reel diameter:||1000 mm|
|Suitable gas:||Propane, methane|
|Gas supply pressure:||100 to 350 mbar|
|Gas consumption:||About 0,15 Nm3 (with propane)|
|Compressed air operating pressure:||5 ÷ 7 bar|
|Compressed air consumption:||70 Nl/cycle|
|Power supply:||400 V+N+PE (+/-10%) - 50 Hz|
|Installed thermal power:||(Variable according to machine configuration) about 310 kW|
|Maximum output:||140 packages/hour|
|Automatic pack height detector|
|The machine can contain up to 6 reels to pack also packages with different sizes and supplied randomly|