Fiber Feeding Device With Pneumatic Conveying for Carding Machines
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Solution Overview
Problem
Existing fibre feed devices for spinning lines face challenges in feeding fibres gradually and regularly to carding machines without tangling, while also needing to handle high processing flows for increased productivity, especially with fibres that are highly permeable to air and difficult to compress.
Innovation Solution
The feed device incorporates a silo with an air-permeable wall, a feed roller, an opening roller, and blowing means to generate a conveying current of air, which helps in detangling and transporting fibres smoothly through a controlled gap between the rollers, ensuring gradual and regular feeding, even for fibres that are difficult to compress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fibre is fed to the working machine gradually and regularly without tangling, then fibre processing quality is improved, but processing flow and productivity are reduced
Solution Approach 1:
The patent employs a pneumatic system with a blowing fan that generates a controlled air current to propel fibre tufts from the silo through the feed roller and into the working machine. This pneumatic assistance enables smoother, more regular fibre feeding without mechanical tangling, while maintaining adequate processing flow by using air pressure to move the fibre continuously through the system.
Solution Approach 2:
The patent introduces an intermediary air current between the silo and the feed roller, and between the feed roller and the working machine. This air current acts as a mediator that facilitates fibre transfer without direct mechanical contact that could cause tangling, enabling regular feeding while preserving processing flow through the pneumatic conveyance of fibre tufts.
2Productivity
If high processing flows are implemented to increase productivity, then productivity is improved, but fibre tangling and processing quality deteriorate
Solution Approach 1:
The patent uses a blowing fan to generate a controlled pneumatic current that maintains fibre tufts in a suspended, controlled state as they move through the feed system. This pneumatic control prevents fibre tangling even at high processing flows by ensuring smooth, regulated fibre movement from the silo through the feed roller into the working machine, thereby maintaining both productivity and feeding regularity.
Solution Approach 2:
The patent employs a feed roller with adjustable speed that can dynamically adapt to maintain optimal feeding conditions. The roller speed can be adjusted to match the processing flow requirements, and the pneumatic system dynamically controls the air current to prevent tangling. This dynamic adjustment allows the system to maintain high productivity while preserving fibre feeding regularity through coordinated mechanical and pneumatic control.
3Manufacturing precision
If air current is used to transport fibre, then fibre feeding regularity is improved, but fibre disturbance and tangling increase
Solution Approach 1:
The patent employs a controlled pneumatic system with a blowing fan that generates a moderate, controlled air current rather than a strong turbulent flow. This controlled pneumatic current propels fibre tufts smoothly from the silo through the feed roller, maintaining feeding regularity while minimizing fibre disturbance and tangling through gentle pneumatic guidance rather than forceful air blasts.
Solution Approach 2:
The patent optimizes the air current parameters by adjusting the blowing fan speed and positioning to create a controlled pneumatic flow regime. The air current parameters are tuned to provide sufficient propulsion for regular feeding while remaining below the threshold that causes fibre disturbance and tangling, achieving the right balance through parameter optimization.
4Productivity
If feed roller speed is increased to improve productivity, then processing flow is improved, but fibre tangling and processing quality deteriorate
Solution Approach 1:
The patent compensates for increased feed roller speed by simultaneously increasing the pneumatic current from the blowing fan. This pneumatic assistance offsets the mechanical stress of higher roller speeds, preventing fibre tangling and maintaining feeding regularity even when the roller operates at speeds that would otherwise cause quality deterioration, thereby enabling higher productivity.
Solution Approach 2:
The system employs coordinated control where the feed roller speed and pneumatic current are adjusted in response to each other. The feedback mechanism ensures that when the roller speed increases to improve productivity, the pneumatic current is相应ingly increased to prevent fibre tangling and maintain feeding regularity, creating a balanced, self-regulating system that preserves quality at higher speeds.
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 device enables continuous and efficient fibre feeding, preventing tangling and ensuring high productivity by using air currents to propel fibres through the system, maintaining the fibre's advancement direction and minimizing disturbance, even with thick fibres, thus optimizing the processing flow.
Implementation Method 1
blowing means (38, 42) able to generate a conveying current of air
Implementation Method 2
at least one upper air-permeable wall (10) suitable for being traversed by the current of air
Data Source
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AI summary
A feed device (6) of fibre in tufts to a carding machine comprises a silo (8), a feed roller (14), an opening roller (30), a basin (22) and a blowing duct (50), which the current of conveying air is channelled in and which comes out on the opening roller. An end compartment (70) is delimited by a lower permeable wall (72) beyond which an intermediate compartment (74) and a second recovery compartment (80) are positioned; the intermediate compartment (74) is separated from the second recovery- chamber by a partition (76) responsive to the current of air to regulate the exit of air towards the second recovery compartment (80) in proportion to the current of air.