Log Saw Clamp Assembly for Uniform Web Log Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional log saw clamping technologies result in inconsistent cuts of convolutely wound web materials, leading to variations in finished product length and core length, 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, allowing for precise positioning and adjustment to maintain consistent cutting, reducing deformation and ensuring orthogonal cuts.
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 being crushed, but the clamps cause uneven pressure that deforms the log resulting in biased cuts and product length variations
Solution Approach 1:
The clamp assembly is divided into multiple independent clamp elements (at least three, preferably four or more) distributed around the log circumference. Each clamp element can apply pressure independently, allowing the system to support the log while distributing pressure more uniformly to prevent deformation and achieve straighter cuts.
Solution Approach 2:
Different regions of the clamp assembly have different properties - the clamp elements are positioned at specific locations around the log circumference to apply pressure where needed, while leaving other regions free. This localized clamping approach provides support without causing the uniform deformation that occurs with conventional single-point or single-plane clamping.
2Ease of operation
If elastic straps or flexible cylindrical strips are used to clamp the log, then the log can be held during sawing, but movement during the clamping process occurs resulting in inconsistent cuts
Solution Approach 1:
The clamp assembly uses a dynamic adjustment mechanism that allows the clamp elements to be positioned and adjusted during operation. The mechanism includes adjustable linkages and positioning devices that enable the operator to fine-tune the position of each clamp element to match the specific log diameter and shape, preventing movement during cutting while maintaining operational flexibility.
Solution Approach 2:
The clamp assembly incorporates feedback through adjustable positioning mechanisms that allow the operator to observe log position and adjust clamp element positions accordingly. This feedback loop ensures the log is properly secured without movement, achieving consistent cuts while maintaining ease of operation through manual adjustment.
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 the support causes log deformation leading to non-orthogonal end cuts
Solution Approach 1:
Instead of using a single continuous guide trough or semi-cylindrical shell that causes deformation, the support system is segmented into multiple discrete clamp elements. These segmented elements provide positioning capability through distributed support points that adapt to the log shape without forcing deformation, enabling orthogonal end cuts.
Solution Approach 2:
The clamp assembly allows adjustment of clamping force and element positioning parameters to match the specific log being processed. By changing these parameters dynamically, the system provides adequate positioning support without applying excessive or uneven pressure that would cause deformation and non-orthogonal cuts.
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 finished product lengths with less than 0.81% relative error, improving product quality, reducing packaging needs, and enhancing storage and transport stability.
Implementation Method 1
At least one cam follower operably connected to a paddle is disposed within a cam
Implementation Method 2
a log saw blade disposed between the log saw clamps and operable to transverse cut a convolutely wound log of web material
Data Source
AI summary
Described herein is an array of finished products, each finished product in the array having a length relative error of less than 0.81% of a target length, H is disclosed. The finished products, which may be toilet paper and kitchen towels, are formed from transversally cutting elongate logs of convolutely wound web materials.