Core End Protector for Cardboard Tissue Rolls
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cardboard core tubes in the tissue manufacturing industry suffer from repeated damage due to various handling stresses, leading to limited reuse, primarily caused by impact, deformation, flaring, and delamination during transportation, unwinding, and handling processes.
Innovation Solution
The implementation of core end protectors with a combination of a rigid base section and a shock-absorbing section, made from materials like metal or high durometer polymers and softer elastomeric materials respectively, which are securely attached to the core ends to distribute impact loads and reduce stress concentrations, thereby minimizing deformation and flaring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the core end is left unprotected, then the core structure remains simple and manufacturing cost is low, but the core end suffers from impact damage, deformation, flaring, and delamination during handling and transportation
Solution Approach 1:
The core end protector is divided into two distinct sections: a rigid base section that attaches to the core end face and provides structural support, and a shock-absorbing section that contacts external forces and impact loads. This segmentation allows each section to perform its specific function optimally while together providing comprehensive protection.
Solution Approach 2:
The core end protector combines materials with different mechanical properties - a rigid material (metal or high durometer polymer) for the base section and a softer shock-absorbing material (elastomeric material) for the outer section. This composite structure enables the protector to both resist impact forces and distribute stresses effectively.
2Strength
If a rigid base section is used for the protector, then structural support and stress distribution are improved, but impact absorption capability is reduced
Solution Approach 1:
Different sections of the core end protector have different material properties tailored to their specific functions: the rigid base section provides structural support and stress distribution where needed, while the softer shock-absorbing section handles impact absorption where external forces contact. This local differentiation of material quality optimizes overall performance.
3Object-affected harmful factors
If the shock-absorbing section is made from softer elastomeric material, then impact absorption is improved, but structural rigidity is reduced
Solution Approach 1:
The softer elastomeric material is applied only to the shock-absorbing section that contacts external forces, while the rigid base section maintains structural integrity and provides attachment to the core. This localized application of different material qualities ensures impact absorption without compromising overall structural rigidity.
4Reliability
If core end protectors are attached to all core ends, then damage during handling and transportation is reduced, but manufacturing cost and assembly complexity increase
Solution Approach 1:
The protector design separates the attachment function (rigid base section with attachment features) from the protection function (shock-absorbing section), allowing for efficient manufacturing and assembly. The modular design enables standardized production processes and simplified installation procedures.
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 core end protectors effectively absorb impact, reduce flaring, and enhance the core's hoop strength, leading to reduced damage and extended usability of the cardboard cores by distributing stress and minimizing material deformation and delamination.
Implementation Method 1
a softer, shock absorbing section (30) made from a elastomeric material characterized by surface toughness, overall flexibility upon impact, and high resistance to material creep and compression set under load
Implementation Method 2
The shock absorbing section is made from a softer durometer polymer or elastomeric material (such as urethane or rubber) characterized by surface toughness, overall flexibility upon impact
Implementation Method 3
The rigid base section is intended to spread out an impact load to a larger area on the cardboard core, thereby reducing stress concentrations which cause core deformation, delamination and tearing
Data Source
AI summary
A core end protector comprised of a shock absorber and an annular, rigid attachment section that is attached to each end of a cardboard tissue core is provided. The core end protectors are securely mounted on the ends of the core. The outer diameter of the core end protector matches the outer diameter of the core. The inner diameter matches the inner diameter of the core. The core end protectors are made both with a rigid base section that mates to the core end face and a softer, shock absorbing section that comes in contact with external forces and impact loads. One single material or a plurality of materials may be used.