Pivotable Winding Core Pressure Control
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Solution Overview
Problem
Existing winding devices with reversible winders experience fluctuations in pressing force due to gravity, leading to air pockets when changing from one roll to another, as the pressure element's position changes with the rotational position of the disk or plate, causing inefficiencies and product defects.
Innovation Solution
A winding device with a pivotable first winding core and a pneumatic control system using an E/P converter to maintain constant pressing force, adjustable pressure roller speed, and elastic surface properties to adapt to material thickness, along with a second pivotable winding core for seamless roll changes without stopping the printing press.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressing element is displaceably arranged on parallel rails to apply pressing force on the winding core, then the pressing force can be adjusted to prevent air pockets, but the pressing force fluctuates due to gravity when the winding core pivots during roll changes
Solution Approach 1:
The patent introduces a compensation force that acts opposite to the gravitational force on the pressing element. This compensation force is generated through a mechanical linkage system connected to the pivoting winding core, creating a counterbalancing effect that neutralizes gravity's varying influence during roll changes, thereby maintaining consistent pressing force
Solution Approach 2:
The patent modifies the pressing element's mechanical parameters by introducing a compensation mechanism that dynamically adjusts the pressing force in response to changes in winding core position. This allows the system to adapt to gravitational variations during pivoting, maintaining optimal pressing conditions throughout the roll change process
2Productivity
If the winding core is made pivotable to enable quick roll changes without stopping the printing press, then productivity is improved, but the pressing element becomes exposed to gravitational fluctuations causing air pockets
Solution Approach 1:
The compensation force mechanism is specifically designed to counterbalance gravitational effects on the pressing element during the dynamic pivoting motion of the winding core. This allows the winding core to pivot freely for quick roll changes while the pressing element remains stable in terms of applied force
Solution Approach 2:
The patent creates a dynamic compensation system where the compensation force automatically adjusts based on the winding core's pivot angle and position. This dynamic adaptation ensures that pressing force stability is maintained throughout the entire roll change process, from the initial position through pivoting to the final position
3Ease of manufacture
If mechanical pressing elements are used on parallel rails, then the structure is simple and easy to manufacture, but the pressing force is subject to gravitational fluctuations during pivoting
Solution Approach 1:
The patent adds a compensation force mechanism to the existing mechanical pressing element structure. This addition counterbalances gravitational fluctuations without fundamentally redesigning the basic mechanical structure, maintaining ease of manufacture while significantly improving pressing force control precision
Solution Approach 2:
The compensation force acts as an intermediary mechanism between the gravitational force and the pressing element. It mediates the interaction by introducing a counterbalancing force that eliminates gravitational fluctuations, allowing the simple mechanical structure to achieve precise pressing force control
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 solution ensures consistent pressing force, reduces air pockets, and allows for precise control of the pressure element, minimizing wear and damage, enabling efficient and distortion-free roll changes without downtime, thus improving product quality and operational efficiency.
Implementation Method 1
an E/P converter which can convert an electrical signal into a pneumatic signal to compensate for the effects of gravity on the pressing element
Implementation Method 2
a pneumatic control, namely an E/P converter, for controlling the pressing force
Data Source
Figure 1
Figure 2~3
AI summary
Winding device 101 for winding a web-shaped material 103, preferably in a printing press, comprising a first winding core 205 onto which the web-shaped material 103 can be wound to form a material roll 207, wherein the first winding core 205 is designed to pivot about a rotational axis 209, a web guide roller 211 which is configured to guide the web-shaped material 103 during winding onto the first winding core 205, and a pressure element 213 which presses the web-shaped material 103 wound onto the first winding core 205 with a pressure force, wherein the pressure element 213 is configured to keep the pressure force on the web-shaped material 103 of the first winding core 205 constant when the first winding core 205 is pivoted about the rotational axis 209, in order to counteract the effects of gravity on the pressure element 213 when the pivot position changes. compensate.