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News for top winding quality and efficiency

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Following a complete design upgrade of its rewinder line, Toscotec launched the new Optima rewinders. The new line has achieved recognition in the market with eight rewinders already sold in Europe, North America and Asia, including single and double width machines.

With six Optima lines as part of turnkey orders by C.A.S. Paper Mill in Thailand, Paloma in Slovenia, Cartiera Confalone in Italy and Essel in Turkey, Toscotec further strengthens its position as advanced technology supplier of complete lines from the tissue machine down to the rewinder. The other two rewinders were sold to leading tissue manufacturers that remain confidential.

The new Optima line preserves the bulk and softness of the parent reels and boosts winding performance, thereby increasing the overall production efficiency.

Through an innovative combination of center wind assist control of the parent reels, unwinding web tensioning system and rewinding nip control system, Optima rewinders preserve tissue quality and deliver optimal reel uniformity.

The unwinding stands feature a compensation system for out-of-round parent reels and a Center Wind Assist (CWA) control, which consists of a combination of belt driven and center drive system, which reduces the pressure applied on the paper by the belts of the unwinding stands. Compared with different systems available on the market, this system reduces the generation of dust and the installed power, which is shared between the belt and the CWA through a motor torque sharing design.

Optima’s efficient web tensioning system avoids elongation loss throughout the rewinder. This is achieved by continuously and precisely controlling the speed of the drive motors, also during machine acceleration and deceleration, in order to carefully guide the paper down to the rewinding station, while avoiding stretching it.

The rewinding section features an automatic nip control system, operating through the load cells installed on the rider roll and the core chucks, which send continuous feedback to the control system, so that the actual thickness and bulk of the wound reel is detected and adjusted in real time.

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