Fibre Composite Manufacturing via Pneumatic Suspension
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Solution Overview
Problem
Existing methods for manufacturing fibre-containing composite panels, such as mineral wool boards, often result in uneven fibre and binder distribution, leading to inconsistencies in density, strength, acoustic properties, and aesthetic appeal, as well as excessive binder usage which affects fire resistance and cost.
Innovation Solution
A method involving suspending fibres in a primary air flow, mixing the binder with the fibres before or during this process, and adding a filler like fire retardants, followed by disentanglement and thorough mixing to achieve a homogeneous composite with controlled density, improved mechanical strength, and enhanced aesthetic consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional mixing and forming processes are used, then production is simpler, but fibre and binder distribution becomes uneven
Solution Approach 1:
The patent uses a primary air flow to suspend fibres and mix them with binder, replacing traditional mechanical mixing equipment. This pneumatic approach achieves uniform fibre and binder distribution without complex mechanical mixing devices, directly resolving the contradiction between distribution uniformity and process complexity
Solution Approach 2:
The patent changes the physical state of fibres from compacted to suspended in air flow, and controls the binding agent concentration during mixing. These parameter changes enable uniform distribution while maintaining process simplicity
2Strength
If high level of binder is used to ensure strength and rigidity, then mechanical properties improve, but fire resistance decreases and cost increases
Solution Approach 1:
The patent optimizes the binding agent concentration to the minimum level required for sufficient strength and rigidity, rather than using excessive binder. This parameter optimization reduces fire hazard and cost while maintaining adequate mechanical properties
Solution Approach 2:
The patent ensures uniform local distribution of binder throughout the panel, preventing both binder-deficient areas (weak spots) and binder-excessive areas (fire hazards). This uniform local quality achieves strength with minimal binder
3Quantity of substance
If compacted fibres are present in the mixture, then fibre concentration increases in certain areas, but binder distribution becomes uneven and curing is incomplete
Solution Approach 1:
The patent suspends fibres in a primary air flow before mixing with binder, preventing fibre compaction and ensuring uniform binder distribution throughout the mixture. This pneumatic suspension method eliminates the fibre compaction problem entirely
Solution Approach 2:
The patent performs fibre suspension and preliminary mixing in air flow before final panel formation, preventing compaction from occurring in the first place. This preliminary action ensures uniform distribution is maintained throughout subsequent processing
4Quantity of substance
If uneven distribution of fibres and binder occurs, then production cost increases due to binder waste, but panel homogeneity decreases
Solution Approach 1:
The patent uses pneumatic suspension and mixing to achieve complete and uniform binder distribution, eliminating binder waste in fibre-compacted areas. This ensures both binder usage efficiency and panel homogeneity
Solution Approach 2:
The patent controls binding agent concentration and mixing parameters to achieve optimal binder distribution efficiency, maximizing the useful benefit of each unit of binder while ensuring complete curing throughout the panel
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 composites with increased mechanical strength, improved acoustic insulation, and consistent appearance, while reducing binder usage and maintaining fire-resistant properties, making them suitable for various applications including building cladding and insulation panels.
Implementation Method 1
suspending the fibres in a primary air flow
Implementation Method 2
mixing the binder with the fibres before, during or after suspension of the fibres in the primary air flow
Implementation Method 3
pressing and curing the mixture to provide a pressed board
Implementation Method 4
curing the formed mixture to the desired density
Data Source
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AI summary
A method for manufacturing a fibre-containing element, said method comprising the steps of: providing fibres, at least some of which are first fibres, such as mineral fibres, polymer fibres, cellulose fibres, or other types of fibres, in an amount of from 3 to 98 wt % of the total weight of starting materials in the form of a collected web, providing a binder in an amount of from 1 to 30 wt % of the total weight of starting materials, subjecting the collected web of fibres to a disentanglement process, suspending the fibres in a primary air flow, mixing the binder with the fibres before, during or after the disentanglement process, providing a filler, such as a fire retardant, in an amount of 1 to 55 wt % of the total weight of starting materials, adding the filler at any suitable step of the method, such as before, during or after the disentanglement process, collecting the mixture of fibres, filler and binder and pressing and curing the mixture to provide a consolidated composite with a density of from 120 kg/m3 to 1000 kg/m3. With this method homogeneous composites can be produced.