In the paper mill, during paper production, narrow rolls often remain left over after cutting. Thanks to the Skiver Line, they can be used by paper and corrugated manufacturers, in order to increase their economic viability.
The Skiver Line was developed to glue two narrow rolls into a full-quality paper roll of the desired width in a single-stage process. This can then be processed into corrugated sheets, without impairing the quality of the finished corrugated.
The continued use of narrow rolls means that paper manufacturers can save the costs for the recycling of unsellable end rolls. Corrugated manufacturers profit to the same extent from the use of the low-cost, narrow end rolls, which, glued together as a wide paper roll, can be processed on a standard corrugator. This allows a reduction of production costs.
- Description
- Technical Data
With the Skiver Line running, two narrow rolls are loaded into the unrolling stands and prepared for the upcoming splice. The web guiding systems guide the paper webs into the two grinding systems. This ensures consistent positioning of the two chamfers. The grinding systems create a consistent chamfer profile on the corresponding center edges of the two paper webs. Grinding dust is removed by the plant vacuum system.
The web guiding systems guide the two paper webs into the lamination point to ensure they are correctly positioned for the center splice. The glue application system ensures that the minimum amount of glue is applied to the edge of one paper web before the center splice takes place.
If included in the scope of supply, the edge trimming system trims the full width paper to ensure a constant width which results in the finished full width roll having a high quality side wall profile.
If included in the scope of supply, the web cleaning system removes residual dust created by the Skiver Line process and the paper manufacturing process thereby increasing the value of the finished full width roll. The paper is rewound on a rewinding system. When the desired roll diameter has been reached, an automatic cross cutter cuts the paper and the finished roll is lowered to the ground. The operator then loads the new core to enable the next rewind cycle to begin.
| Metric | Std. (Imperial) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| min. | max. 2,5 m | max. 2,8 m | UOM | min. | max. 98“ | max. 110“ | UOM | ||
| Paper type | Recycled / Test / Kraft | ||||||||
| Paper weight | 90 | 225 | 225 | g/m2 | 23# | 53# | 53# | lb/sqf | |
| Roll weight max. | Rewind | 3.400 | 3.820 | kg | 7,500 | 8,400 | lbs | ||
| Roll weight max. | Unwind | 1.700 | 1.910 | kg | 3,750 | 4,200 | lbs | ||
| Final paper width | 1.000 | 2.500 | 2.800 | mm | 40 | 100 | 110 | Inch | |
| Incoming paper width | 500 | 1.250 | 1.400 | mm | 20.00 | 50.00 | 55.00 | Inch | |
| Final paper roll diameter (min. = core dia) | 100 | 1.500 | 1.500 | mm | 4 | 60 | 60 | Inch | |
| Mechanical max. speed | bei 23 lb/sqf | 90 g/m2 | 300 | 300 | m/min | 1,000 | 1,000 | fpm | ||
| Mechanical max. speed | bei 40 lb/sqf | 170 g/m2 | 230 | 230 | m/min | 750 | 750 | fpm | ||
| Mechanical max. speed | bei 53 lb/sqf | 225 g/m2 | 150 | 150 | m/min | 500 | 500 | fpm | ||
| Paper tension process section | Standard | 3,5 | 3,5 | N/cm | 2.0 | 2.0 | pli | ||
| Paper tension rewind section | Standard | 10,0 | 10,0 | N/cm | 6.0 | 6.0 | pli | ||
| Paper tension (process L/R absolute) | 450 | 500 | N | 100 | 110 | lbs | |||
| Paper tension (rewind absolute) | 2.700 | 3.000 | N | 600 | 660 | lbs | |||
| Operating voltage | 480 V, 3 ph, 50/60 Hz | ||||||||
| Air pressure | 2 | 7 | 7 | bar | 30 | 100 | 100 | psi | |
| Temperature range | 2 | 40 | 40 | °C | 35 | 105 | 105 | °F | |
| Machine color | RAL 1013 | Oyster white | |||||||
| Electric cabinet color | RAL 7032 | Pebble gray | |||||||
| Documentation | English | ||||||||
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Skiver Line process overview
The Skiver Line process is based on the Center Splice function, in which the two paper webs are spliced together and the narrow rolls are turned into a full-width roll. In the first step, the two appropriate paper webs are ground at the edges to be spliced. This creates a precise chamfer profile. Then, glue is applied to one paper edge and the two paper webs are run together constantly, in order to guarantee a precise, even splice without changes in thickness at the splice point.
Profit from the process
The installation of automatic splicing systems in the unwinder guarantees optimum machine efficiency. The rewinder possesses a two-drum rewinder, which ensures an optimum rewinding quality and thus for perfect unwinding on the corrugator. To keep the production costs as low as possible, the Skiver Line was designed in such a way that only two employees are required for operation. The Skiver Line is as robust and reliable as any other E+L product. This means that the Skiver Line can be employed around the clock with minimal planned maintenance.
