Web Cutter Heated Element and Puck Transfer for Spin Pitch Control
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Solution Overview
Problem
Existing systems for cutting or perforating continuous web materials in the production of disposable absorbent articles face complications when dealing with spin and pitch modifications, particularly in systems that require precise translation of cut pads.
Innovation Solution
An apparatus and method utilizing a transfer mechanism with rotatably driven pucks and a cutter comprising a heated element, fluid jets, or an improved anvil roller, allowing for spinning and spacing adjustments of cut pads while transferring them to a receiving surface, using a combination of spin and pitch cams to alter puck positions and a cutting mechanism that includes a heated wire or fluid jets for cutting or perforation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a knife and anvil are used to cut the web, then cutting function is achieved, but the system becomes complicated when spin and pitch modifications are required
Solution Approach 1:
The patent replaces the traditional mechanical knife-anvil cutting system with a heated element cutting system. The heated element (wire, ribbon, or bar) cuts the web through thermal fusion rather than mechanical shearing, eliminating the need for complex knife-anvil mechanisms while enabling spin and pitch modifications through the transfer mechanism with pucks and cams.
Solution Approach 2:
The patent introduces fluid jets (pneumatic or hydraulic) as an alternative cutting mechanism. The fluid jets impinge on the web to cut or perforate it, replacing the mechanical knife-anvil system and enabling greater flexibility in pad translation, spin, and pitch modification without increasing mechanical complexity.
2Manufacturing precision
If traditional cutting systems are used, then simple cutting is achieved, but precise control over pad orientation and spacing is limited
Solution Approach 1:
The patent employs a dynamic transfer mechanism where pucks are rotatably driven about a transfer axis and their positions are continuously adjusted by spin cams and pitch cams. This dynamic system enables precise control over pad orientation (spin) and spacing (pitch) while maintaining high processing speeds, resolving the contradiction between precision and productivity.
Solution Approach 2:
The cutting action is performed before the pads are transferred to the receiving surface. The web is cut into individual pads while still on the moving conveyor, allowing subsequent spin and pitch adjustments to be made during the transfer process without slowing down production. This preliminary cutting enables precise orientation and spacing control to be implemented dynamically.
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 efficient cutting and perforation of web materials with precise control over pad orientation and spacing, improving the processing efficiency and accuracy in the production of disposable absorbent articles by allowing for spin and pitch modifications during transfer.
Implementation Method 1
The cutter comprises a heated element (e.g., wire, ribbon, bar, or embossing or perforating element)
Implementation Method 2
one or a plurality of fluid jets
Data Source
AI summary
Systems and methods utilizing stationary and/or moveable cutting components provide limited interference with web processing operations, such as pad spin and pitch alteration. Heat, laser, fluid, or mechanical cutting operations may be used, including respectively, a heated element (e.g., wire, ribbon, bar, or embossing or perforating element) that may be triggered inductively, water or steam jets, or improved knife/anvil cooperation.