Cold Corrugating Rolls With Vacuum-Fluted Paperboard Forming
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Solution Overview
Problem
Conventional corrugated paperboard manufacturing processes are large, energy-intensive, and require significant shipping due to their size, leading to high costs and environmental impact, with inconsistent product quality and susceptibility to warping.
Innovation Solution
A method and apparatus for manufacturing corrugated paperboard using a cold corrugator that operates at ambient temperature, eliminating the need for heat and steam, and employing a vacuum system to form fluted web without tearing, combined with thermoplastic glues for bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional heated corrugating processes are used, then the corrugating medium becomes pliable and can be formed into corrugations, but the process requires large amounts of energy and produces inconsistent product quality with warping
Solution Approach 1:
The invention changes the physical state parameters of the corrugating medium by controlling moisture content (8-15%) and using ambient temperature (20-40°C) instead of high heat, fundamentally altering the process conditions to achieve both energy efficiency and consistent quality
Solution Approach 2:
The invention replaces the thermal system (heated rollers and steam) with a mechanical system (vacuum pressure and controlled moisture), substituting heat-based pliability with moisture-based flexibility to eliminate energy consumption while maintaining formability
2Productivity
If large manufacturing apparatus are used, then corrugated paperboard can be produced, but the apparatus size leads to high shipping costs and environmental impact
Solution Approach 1:
The invention segments the manufacturing process into modular components (vacuum system, moisture control system, corrugating rollers) that can be distributed or scaled independently, reducing the need for large centralized facilities and enabling local production closer to end users
Solution Approach 2:
The invention enables the corrugating medium to self-form corrugations through vacuum pressure and controlled moisture without requiring large heated apparatus, allowing for compact equipment design that can be deployed in smaller, more distributed manufacturing locations
3Ease of manufacture
If heated rollers are used to remove moisture and enhance elasticity, then the paper can be corrugated, but the process becomes complex and requires precise temperature control
Solution Approach 1:
The invention extracts the heating components (heated rollers and steam generation systems) from the corrugating process, eliminating the need for complex temperature control systems while maintaining the essential function of creating pliable corrugating medium through moisture control alone
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
This approach results in a compact, energy-efficient process that produces high-strength, uniformly formed corrugated paperboard with reduced warping and material usage, enhancing environmental sustainability.
Implementation Method 1
a vacuum system configured to hold the corrugating medium on the corrugating roll
Data Source
AI summary
A method for manufacturing corrugated paperboard is disclosed. The method comprises: directing a corrugating medium from a corrugating medium supply roll to a pair of corrugating rolls; and operating the pair of corrugating rolls to corrugate the corrugating medium; wherein each corrugating roll is operated at ambient temperature; and wherein the step of operating the pair of corrugating rolls to corrugate the corrugating medium comprises forming a fluted web in which the corrugating medium substantially conforms around a plurality of corrugator peaks and is spaced from a plurality of corrugator troughs in at least one of the pair of corrugating rolls.