Trapezoidal Elastic Wings Diaper Chassis Application
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Solution Overview
Problem
Existing methods for applying elastic wings to diapers face issues such as high raw material usage, aesthetic concerns, and constraints on machine size, leading to increased production costs and waste.
Innovation Solution
A method and apparatus that utilize a single functional unit to apply trapezoidal elastic wings by alternating adjacent panels with smaller and larger bases on a ribbon, applying tape to the smaller base, and diverting the ribbon for sequential application on both sides, reducing material waste and allowing for adjustable diaper sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If separate wing forming lines are used for trapezoidal panels, then aesthetic appearance is improved, but raw material waste increases
Solution Approach 1:
The patent merges the formation of left and right elastic wings into a single integrated process using one continuous panel and one continuous tape applied by a single functional unit. This combining approach eliminates the waste associated with separate wing forming lines while maintaining the trapezoidal aesthetic appearance, as the single functional unit applies the tape to form both wings simultaneously from the continuous panel material.
Solution Approach 2:
The patent recovers material that would otherwise be wasted by utilizing the entire width of the continuous panel and continuous tape. The single functional unit is configured to apply the tape along the entire length of the panel to form both wings, ensuring that no material is discarded and maximizing material utilization while achieving the desired trapezoidal wing shape.
2Ease of manufacture
If double-width raw material is used, then production cost is reduced, but raw material waste increases
Solution Approach 1:
The patent segments the application process into distinct functional zones within a single functional unit, where the continuous panel and continuous tape are processed differently to form left and right wings. This segmentation allows the use of standard-width materials rather than double-width materials, reducing both cost and waste by processing materials in an efficient, organized manner without requiring excessive material width.
3Device complexity
If a single functional unit is used, then device complexity is reduced, but adaptability to different diaper sizes is constrained
Solution Approach 1:
The patent incorporates adjustable and reconfigurable components within the single functional unit, allowing the tape application width, panel width, and wing dimensions to be dynamically adjusted. This enables the same functional unit to accommodate different diaper sizes by modifying operational parameters rather than requiring multiple fixed functional units, thus maintaining simplicity while achieving versatility.
Solution Approach 2:
The single functional unit is designed with multi-functionality to perform multiple tasks: it forms both left and right elastic wings, applies continuous tape, processes continuous panel material, and accommodates various diaper sizes. This universal design eliminates the need for separate functional units for different operations or sizes, reducing device complexity while maintaining adaptability through programmable or adjustable mechanisms.
Data Source
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AI summary
A method for applying trapezoidal elastic wings to the chassis of a diaper includes the steps of: providing a ribbon, from which alternating adjacent trapezoidal panels are obtained, each having a smaller base and a larger base that are alternated on each side of the ribbon; applying a tape to the panels ribbon, at the smaller base of each panel, providing an elastic wing constituted by the trapezoidal panel provided with the respective tape; applying the wings to a first side of a support material ribbon, by means of a single functional unit; diverting the support material ribbon and feeding again the support material ribbon to the single functional unit in order to apply the wings to the other side of the support material ribbon by means of the single functional unit. The apparatus is characterized by the single functional unit, constituted by a shaping device and a pair of wing applicators; the single functional unit receives the support material ribbon and the elastic material ribbon on which the elastic wings are provided; the single functional unit applies the elastic wing to the first side of the support material, which is diverted by an axial diversion means and fed again to the single functional unit, which applies the second wing to the other side of the support material ribbon, aligned with the first elastic wing.