Rewinding Machine Pressure Rollers Vibration Control
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Solution Overview
Problem
Existing rewinding machines for tissue paper veils suffer from vibrations due to contact with the forming coil, leading to instability and limited maximum winding speed.
Innovation Solution
A rewinding machine with a pressure unit equipped with multiple motorized rollers that rotate in contact with the coil, along with a pneumatic system to interrupt the paper veil continuity, allowing for increased winding speed and stability by minimizing vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single pressure roller is used to contact the forming coil, then the structure is simple, but vibrations occur that make the winding unit unstable and limit maximum winding speed
Solution Approach 1:
The single pressure roller is divided into multiple pressure rollers (at least two) that are distributed along the winding path. Each roller contacts the forming coil at different positions, which segments the contact points and distributes the mechanical load, thereby reducing vibrations and improving stability while enabling higher winding speeds
2Productivity
If multiple pressure rollers are used to reduce vibrations, then winding speed increases, but the device complexity increases
Solution Approach 1:
Multiple pressure rollers are combined into a single integrated pressure unit that operates as one functional system. The rollers are mounted on a common support structure and controlled by a single drive mechanism, merging their individual functions into a coordinated unit that reduces vibrations without proportionally increasing overall device complexity
3Ease of operation
If the pressure roller contacts the coil continuously, then winding is stable, but the veil continuity cannot be interrupted for core exchange
Solution Approach 1:
The pressure rollers are designed with dynamic positioning capability, allowing them to move along the winding path. During normal operation, they maintain continuous contact with the coil for stable winding. During core exchange, the rollers can be repositioned or temporarily withdrawn to allow veil interruption and core replacement, providing operational flexibility without compromising winding stability during active operation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The machine achieves higher winding speeds while maintaining product quality by stabilizing the contact between pressure rollers and the coil, reducing vibrations and enabling efficient core exchange and veil tearing.
Implementation Method 1
pneumatic means are provided to interrupt the continuity of the paper veil at the end of a winding cycle
Data Source
AI summary
Rewinding machine comprising a drive unit (1) for supplying a paper veil (2); a winding unit (3) for winding the paper veil supplied by the drive unit into a coil (W) around a winding core (4), comprising a primary roller (6) and a secondary roller (7) rotating in contact with the winding core (4), and a pressure unit (30) provided with a rotating roller (A, B, C) on the coil (W) that is being formed; a core exchange unit (5) for ejecting the formed coil (W) from the machine at the end of a winding cycle and inserting a new core to be wound; separation means (11) for interrupting the continuity of the paper veil at the end of a winding cycle; means for winding a drawing flap (34) of the veil (2) on the new core (4) at the beginning of a new winding cycle.