Rotary Means for Absorbent Segment Orientation and Spacing
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Solution Overview
Problem
Existing methods for processing discrete segments of absorbent articles fail to efficiently change the orientation and spacing of these segments, leading to longer processing times and the need for replacing entire devices when changing product sizes, which is not flexible or compact enough for modern manufacturing demands.
Innovation Solution
A method and device that rotate discrete segments by 90° while simultaneously adjusting their spacing by using a rotary means with motion transmission members to control relative rotation and oscillation, allowing for quicker changeovers and processing different sizes with fewer components, using a single device with a working circumference tailored to the segment size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If segments are rotated by a rotary means with multiple accelerators downstream, then the orientation of segments is changed, but the device complexity increases and the spacing adjustment requires multiple components
Solution Approach 1:
The patent combines the rotation function and spacing adjustment function into a single rotary means. The rotary means simultaneously performs both the orientation change (rotation) and the spacing adjustment (through oscillation motion) of the segments, eliminating the need for separate accelerators downstream. This merging of functions directly reduces device complexity while maintaining operational effectiveness.
Solution Approach 2:
The rotary means is designed to perform multiple functions: it rotates the segments to change their orientation, adjusts the spacing between segments through oscillation, and transports segments from the pickup station to the releasing station. This multi-functionality allows a single device to replace what would traditionally require multiple separate components, including multiple accelerators.
2Adaptability or versatility
If the entire device is replaced to process different segment sizes, then all size requirements are met, but the loss of time for changeover and installation increases
Solution Approach 1:
The rotary means is designed with adjustable oscillation parameters (amplitude and frequency) that can be dynamically changed to accommodate different segment sizes. Instead of replacing the entire device, the operational parameters of the rotary means are adjusted to match the requirements for different segment dimensions, enabling quick changeovers without time-consuming installation of new components.
Solution Approach 2:
The patent utilizes parameter changes in the oscillation motion of the rotary means to adapt to different segment sizes. By varying the amplitude and frequency of oscillation, the device can process segments of different dimensions efficiently. This parameter-based adaptation eliminates the need for physical replacement of the entire device, significantly reducing changeover time.
3Manufacturing precision
If the spacing between segments is reduced to position them perpendicular to feed direction, then the manufacturing precision is improved, but the segments require more acceleration and deceleration
Solution Approach 1:
The rotary means performs preliminary acceleration and oscillation of segments before they reach the releasing station. By pre-positioning the segments at the correct spacing and orientation during the rotation process, the system minimizes the need for sudden acceleration or deceleration forces at the release point. This preliminary action ensures precise positioning while reducing the mechanical stress on the segments.
Data Source
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AI summary
A method for processing a discrete segment (10) of material for absorbent articles comprises a step of picking up the segment (10) from a first succession (S1) of segments (10) disposed at a first spacing (P1) from each other; a step of releasing the segment (10) to define a second succession (S2) of segments (10) disposed at a second spacing (P2) from each other; a step of rotating the segment (10) carried out between the step of picking up and the step of releasing and which involves disposing the segment (10) from a first configuration, corresponding to the configuration of the segment (10) of the first succession (S1), to a second configuration, rotated relative to the first configuration and corresponding to the configuration of the segment (10) of the second succession (S2); between the step of picking up and the step of releasing there is a step of accelerating the segment (10) and a step of decelerating the segment (10); the step of rotating the segment (10) is carried out simultaneously with at least one between the step of accelerating and the step of decelerating.