Log Saw Clamp Assembly for Uniform Cuts in Wound Web Logs
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Solution Overview
Problem
Current log saw clamping technologies result in inconsistent cuts of convolutely wound web materials, leading to variations in finished product length and core size, causing issues with product quality, packaging efficiency, and storage stability.
Innovation Solution
A log saw clamp assembly with opposed paddles that apply uniform force to the log, using a cam follower system to maintain consistent pressure and prevent deformation, ensuring orthogonal cuts and reducing variability in product dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional clamping devices are used to hold the log during sawing, then the log can be supported and prevented from crushing, but the clamps cause deformation of the log resulting in biased or uneven cuts
Solution Approach 1:
The clamping system is divided into multiple independent clamps positioned around the log circumference, each applying force at specific locations. This segmentation allows uniform distribution of clamping force without concentrating stress at single points, preventing log deformation while maintaining support strength during the cutting process
Solution Approach 2:
The clamps are designed with specific geometric features (flat inner surfaces, curved outer surfaces) that match the log geometry at contact points. This local quality optimization ensures uniform pressure distribution across the log surface, preventing deformation while providing adequate support against crushing forces during sawing
2Ease of operation
If elastic straps or flexible cylindrical strips are used as clamps, then the log can be held during cutting, but movement during clamping occurs resulting in inconsistent cuts
Solution Approach 1:
The clamps incorporate movable elements that can dynamically adjust to the log position and movement during the cutting cycle. The clamping mechanism remains flexible enough to accommodate log movement while maintaining sufficient grip to prevent excessive displacement, ensuring cut consistency without sacrificing ease of operation
Solution Approach 2:
The clamping system is designed with feedback mechanisms that monitor log position and clamp force during operation. This allows real-time adjustment of clamping pressure to maintain optimal grip without deformation, ensuring consistent cuts while preserving the simplicity of the clamping operation
3Ease of manufacture
If guide troughs or semi-cylindrical shells are used to support the log, then the log can be positioned during sawing, but uneven pressure is applied causing log deformation and biased cuts
Solution Approach 1:
The clamp design incorporates asymmetric geometric features where the inner surface geometry differs from the outer surface geometry. The inner surfaces are designed with specific asymmetries that match the log cross-section shape, allowing uniform pressure distribution and accurate positioning while maintaining ease of manufacture through standardized component designs
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 solution achieves consistent transverse cuts with reduced variability in finished product length and core size, enhancing product quality, packaging efficiency, and storage stability by minimizing deformation and ensuring uniform pressure application.
Implementation Method 1
A log saw clamp assembly with opposed paddles that apply uniform force to the log, using a cam follower system to maintain consistent pressure and prevent deformation
Data Source
AI summary
Described herein is an array of finished products, each finished product in said array may have a Percent Compressibility of greater than 3.00% and an actual length ranging from about 10.955 inches to about 11.045 inches. The finished products may be paper towels, where the actual length is different for at least two finished products of the array and where at least one of the finished products of the array of finished products may comprise a protruding core and where at least one of the finished products may comprise a hidden core, and where each of the finished products are in a package.