Fiber Structure Manufacturing Using Nap-Raised Retainer Sheets
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Solution Overview
Problem
Existing methods for manufacturing waste paper boards often result in surface fibers becoming frayed and losing shape due to simple heating and pressing, leading to inconsistencies in the final product.
Innovation Solution
A fiber structure manufacturing apparatus and method that involves defibrating fiber raw materials, mixing with a melting material, forming a fibrous web, and using shape retainer sheets with raised naps to enhance bonding and prevent shape loss through controlled heating and pressing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simple heating and pressing is applied to the fibrous web, then the manufacturing process is simple and fast, but the surface fibers become frayed and lose shape
Solution Approach 1:
The patent applies preliminary action by raising nap on the shape retainer sheet before the heating and pressing process. This pre-treatment creates a surface structure that will interact beneficially with the fibrous web during subsequent processing, preventing fiber fraying while maintaining manufacturing efficiency
Solution Approach 2:
The shape retainer sheet with raised nap acts as an intermediary between the heating/pressing mechanism and the fibrous web. It mediates the interaction by providing a controlled surface that holds fibers in place during processing, preventing direct harmful contact between the pressing mechanism and surface fibers
2Strength
If shape retainer sheets with raised nap are supplied to the fibrous web, then bonding strength and shape retention are improved, but the device complexity increases
Solution Approach 1:
The patent changes the surface parameter of the shape retainer sheet by raising nap, transforming a simple flat sheet into one with a specific surface structure. This parameter change enhances bonding capability without requiring a complete redesign of the sheet supplying unit
Solution Approach 2:
The nap-raising process is performed as a preliminary action on the shape retainer sheet before it contacts the fibrous web. This pre-treatment prepares the sheet for optimal bonding while using a relatively simple mechanical process that can be integrated into existing equipment
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 method produces a stable fiber structure with improved bonding strength and shape retention, suitable for applications like sound absorption and cushioning, while minimizing water usage and energy consumption.
Implementation Method 1
a heating-and-pressing mechanism that forms a fiber structure by heating and pressing the fibrous web
Implementation Method 2
supplying a shape retainer sheet to the fibrous web in such a state that nap is raised on a surface, of the shape retainer sheet, that is to be in contact with the fibrous web
Data Source
AI summary
A fiber structure manufacturing apparatus includes: a defibration unit that pulverizes and defibrates a fiber raw material that contains fibers; a transportation unit that transports a defibrated material after defibration by the defibration unit; a melting-material mixing unit that mixes a melting material into the defibrated material transported by the transportation unit; a fibrous web forming unit that forms a fibrous web by causing a mixture of the defibrated material and the melting material to accumulate; a sheet supplying unit that supplies a shape retainer sheet to the fibrous web; and a heating-and-pressing mechanism that forms a fiber structure by heating and pressing the fibrous web after the shape retainer sheet is supplied; wherein the sheet supplying unit supplies the shape retainer sheet in such a state that nap is raised on a surface, of the shape retainer sheet, that is to be in contact with the fibrous web.