Needle Loom Drive Phasing Adjustment Mechanism
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Solution Overview
Problem
Existing needle looms require manual and offline adjustment of main shaft phasing, making it inconvenient to adapt the stroke of the needle beam in the conveying direction of the nonwoven web during operation.
Innovation Solution
A needle loom with a drive device comprising a first and second main shaft, connected by an endless transmission element and adjustable rollers, allowing for mechanical adjustment of the phasing between the main shafts during operation, enabling precise control of the needle beam's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual and offline adjustment of main shaft phasing is used, then the structure remains simple, but the adaptability to adjust needle beam stroke during operation is poor
Solution Approach 1:
The patent applies the dynamics principle by replacing static manual adjustment with a dynamic adjustment mechanism. The adjusting roller can be positioned at different locations along the endless transmission element, allowing the phasing between main shafts to be changed during operation. This enables the needle beam stroke to be adapted in real-time according to processing requirements, transforming a static system into a dynamic one that can respond to changing conditions.
Solution Approach 2:
The adjusting roller serves as an intermediary element between the endless transmission element and the main shafts. By positioning the adjusting roller at different locations on the transmission element, the phasing of the main shafts can be modified without directly changing the transmission element itself. This intermediary mechanism provides a simple yet effective way to achieve adaptability while maintaining overall system simplicity.
2Productivity
If manual adjustment is used, then the device complexity is low, but the productivity is reduced due to offline adjustment requirements
Solution Approach 1:
The dynamic adjustment capability allows the needle beam stroke to be modified during operation without stopping the machine. The adjusting roller can be repositioned along the endless transmission element while the loom continues to operate, enabling continuous production with adaptive stroke adjustment. This eliminates the productivity loss associated with offline adjustments.
Solution Approach 2:
The patent enables continuous operation of the needle loom by allowing phasing adjustments to be made during operation. The endless transmission element continuously moves, and the adjusting roller can be repositioned at any time without interrupting the needling process. This ensures that the useful action of consolidating nonwoven material continues uninterrupted, maximizing productivity.
3Adaptability or versatility
If fixed phasing is used, then the manufacturing precision is maintained, but the adaptability to different consolidation requirements is poor
Solution Approach 1:
The adjusting roller acts as a precision intermediary that can be positioned at specific locations along the endless transmission element. Each position corresponds to a specific phasing angle between the main shafts, allowing precise control of the needle beam stroke. The intermediary mechanism maintains precision while enabling adaptation to different consolidation requirements through controlled positioning.
Solution Approach 2:
The patent implements parameter changes by allowing the phasing angle between main shafts to be varied through adjustment of the roller position on the endless transmission element. Different positions correspond to different phasing parameters, enabling optimization of the needle beam stroke for various nonwoven material types and consolidation requirements while maintaining precise control over the adjustment.
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
Enables simple and accurate adjustment of the phase angle between main shafts, allowing for real-time adaptation of the needle beam's stroke, improving the consolidation process of nonwoven webs.
Implementation Method 1
The first and second main shafts are coupled to each other by an endless transmission element
Implementation Method 2
An adjusting device is provided for the translational adjustment of the position of the first and second adjusting rollers. The translational adjustment of the position of the first and second adjusting rollers by the adjusting device brings about a rotational adjustment of the phasing of the first and second main shafts with respect to each other.
Implementation Method 3
a first main conrod is eccentrically supported on the first main shaft and connects the first main shaft to the needle beam arrangement in articulated fashion
Implementation Method 4
a first main conrod is eccentrically supported on the first main shaft and connects the first main shaft to the needle beam arrangement in articulated fashion
Data Source
AI summary
The needle loom for needling a nonwoven web comprises a needle beam arrangement, which comprises at least one needle beam, and a drive device for moving the needle beam arrangement back and forth in a punching direction. The drive device comprises a drive and two main shafts, on each of which a main conrod is eccentrically supported. The main conrods connect the main shafts to the needle beam arrangement in articulated fashion. The main shafts are driven rotationally in opposite directions. The drive device comprises an endless traveling transmission element, which couples the main shafts to each other. The transmission element also passes around first and second adjusting rollers. An adjusting device is provided for a translational adjustment of the position of the first and second adjusting rollers. This translational adjustment brings about a rotational adjustment of the phasing of the main shafts with respect to each other.