Composite Cylinder Vibration Damping for Paper Processing
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Solution Overview
Problem
Existing apparatus for processing corrugated cardboard sheets face issues such as sheet breaking due to high processing speeds and insufficient gluing pressures, leading to reduced quality and increased costs, with existing solutions either causing deformation or applying inadequate pressure.
Innovation Solution
An apparatus featuring a first cylinder with a composite material work surface and a metal support body, where the composite material work surface is fitted to the support body through a mechanical interference fit, allowing for high gluing pressures without sheet damage, and includes a profiling means for adjusting the surface to prevent wear and maintain accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high processing speeds are used to increase productivity, then processing efficiency is improved, but sheet breaking occurs due to cylinder vibrations at hypercritical speeds
Solution Approach 1:
A composite material layer is introduced as an intermediary between the metal support body and the paper sheet. This composite layer acts as a vibration-damping intermediary that absorbs mechanical vibrations and shocks, preventing them from being transmitted to the paper sheet while allowing the cylinder to operate at high speeds without causing sheet breaking.
Solution Approach 2:
The cylinder is constructed using composite materials consisting of a metal support body and a composite material layer (such as rubber or polymer). This composite structure combines the strength of metal with the vibration-damping properties of the composite material, enabling the cylinder to maintain structural integrity at high speeds while reducing harmful vibrations that would otherwise cause sheet breaking.
2Strength
If high gluing pressures are applied to improve gluing quality, then bonding strength is improved, but sheet breaking occurs due to excessive pressure from rigid cylinders
Solution Approach 1:
The composite material layer in the cylinder provides a combination of pressure transmission and shock absorption. It allows sufficient gluing pressure to be applied for strong bonding while simultaneously damping pressure spikes and vibrations that would otherwise cause sheet breaking, thus achieving both high gluing strength and sheet integrity.
Solution Approach 2:
The composite material changes the pressure transmission characteristics of the cylinder. It modifies the pressure distribution by smoothing out peaks and valleys, providing more uniform pressure application that achieves effective gluing without the extreme pressure values that would damage the sheet.
3Force
If a steel cylinder is used to provide sufficient gluing pressure, then gluing capability is improved, but sheet breaking occurs due to excessive rigidity and pressure
Solution Approach 1:
The cylinder replaces a purely steel construction with a composite structure where a metal support body is covered by a composite material layer. This composite construction maintains the necessary gluing pressure capability while the composite layer provides vibration damping and pressure smoothing, preventing sheet breaking that would occur with a rigid steel cylinder.
Solution Approach 2:
The cylinder design applies different material properties to different parts of the structure. The metal support body provides structural strength and pressure transmission, while the composite material layer provides vibration damping and pressure smoothing. This local differentiation of material qualities allows the cylinder to simultaneously achieve high gluing pressure and prevent sheet breaking.
4Reliability
If the first cylinder is made freely movable to reduce pressure on paper, then sheet breaking is prevented, but gluing pressure becomes insufficient for some corrugated cardboard types
Solution Approach 1:
The composite material layer enables the cylinder to be supported in a way that provides both vibration damping and sufficient gluing pressure. The composite construction allows the cylinder to maintain contact with the paper without excessive rigidity, preventing breaking while the metal support body ensures enough pressure is transmitted for effective gluing of various corrugated cardboard types.
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 apparatus effectively prevents sheet breaking and ensures high gluing pressures, maintaining quality and reducing production costs by using a composite material cylinder that remains securely attached and can be easily maintained, while avoiding deformation and maintaining processing efficiency.
Implementation Method 1
The work surface (3a) is made of composite material, more preferably of fibre-composite material with polymeric matrix... The support body (3b) is on the contrary made of metal material, in particular steel... having a heat expansion coefficient suitably included between 12·10 -6 and 18·10 -6
Data Source
Figure 1
Figure 2a~2b
Figure 3~4
AI summary
It is provided an apparatus (1) for processing sheets of paper material, comprising: a calender (2) adapted to treat at least one sheet of paper material and including a first cylinder (3) and a second cylinder (4), the first cylinder (3) comprising a work wall (3a) of composite material, forming the outer work surface (3c) of the first cylinder (3) and a support body (3b) having an outer surface coaxial to and in contact with the work surface (3a), the first cylinder (3) being obtained by fitting of the work surface (3a) on the support body (3b).