Front Lay Speed Profile for Noise Reduction
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Solution Overview
Problem
Existing front lays systems experience increased noise levels and adverse effects on material quality due to high impact and lifting speeds, leading to wear and vibrations, which require constant readjustment and affect the contact register.
Innovation Solution
The front lays are designed with a rigid mark lever rotatably mounted in a holder, connected to a marker shaft, using a compression spring to adjust their position and contact line, and a speed profile mechanism to maintain consistent impact and lift-off speeds across all positions, avoiding disturbing impulses and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the position of front lays is shifted in sheet transport direction, then the impact and lifting speed is increased, but wear on front lays and stops increases and noise level increases
Solution Approach 1:
The patent applies dynamics by implementing a speed profile that varies the rotational speed of the marker shaft during the cycle. The shaft rotates slower during alignment (when front lays contact stops) and faster during lifting (when front lays are removed from feed table). This dynamic speed adjustment optimizes both alignment precision and cycle efficiency while reducing wear and noise during critical contact phases.
Solution Approach 2:
The patent changes the speed parameter of the marker shaft throughout the operational cycle. By varying the rotational speed according to a predefined speed profile, the system achieves optimal impact speed for alignment while limiting excessive speeds that cause wear and noise. The speed parameter is dynamically adjusted based on the operational phase.
2Speed
If the position of front lays is shifted in sheet transport direction, then impact and lifting speed increases, but contact register is adversely affected by bouncing behavior and vibrations
Solution Approach 1:
The speed profile creates dynamic conditions where the marker shaft rotates at controlled speeds during different phases. During alignment, the slower speed minimizes bouncing and vibrations that would affect contact register quality. During lifting, the faster speed improves efficiency without compromising alignment precision.
Solution Approach 2:
The speed profile preemptively reduces the rotational speed during the alignment phase before bouncing and vibrations can adversely affect the contact register. This preliminary anti-action prevents the harmful effects rather than correcting them after they occur.
3Adaptability or versatility
If front lays are made rigid and adjusted against energy accumulator, then adjustment flexibility is improved, but high impact speeds still cause wear and noise
Solution Approach 1:
The patent combines rigid front lays with adjustable stops (providing adjustment flexibility) with a dynamic speed profile (controlling impact speeds). The rigidity of front lays is maintained for structural integrity, while the speed control mitigates the harmful effects of impact and lifting.
Solution Approach 2:
The system maintains rigid front lays with adjustable positions (flexibility in positioning) while changing the speed parameter during operation. The speed profile ensures that even with rigid components, the impact and lifting speeds are controlled to minimize wear and noise.
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 solution allows for precise positioning of front lays without increasing noise levels or affecting material quality, ensuring consistent performance and reducing wear and vibrations, thus improving the overall system stability and accuracy.
Implementation Method 1
By means of a compression spring 10 provided between the marker lever 4 and the holder 6, the stop 9 of the marker lever 4 is guided against the projection 8 of the holder 6
Data Source
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AI summary
The lay has a band distributed over the width of a feed table accomplishes a speed profile (22) between an aligning position at the table and a resting position, which is remote from the table. The front lay stands in contact with stop units, which are adjustable within an adjusting range in its position in the aligning position. The lay passes through the adjusting range of the stop unit with a constant speed.