Compact Dunnage Conversion Machine with Floating Feeding Assembly
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Solution Overview
Problem
Existing dunnage conversion machines face issues with material jamming, maintenance accessibility, and maintaining uniform tension in multi-ply sheet stock during the conversion process, which affects the quality and efficiency of the dunnage product.
Innovation Solution
A compact dunnage conversion machine design featuring a stock supply assembly with laterally-spaced supports for rolls, a housing with an open-sided forming assembly for easy access, a feeding/connecting assembly with floating components to prevent jamming, and a severing assembly that ensures consistent tension by directing plies through separate paths, allowing for efficient conversion of sheet stock into a thicker, less dense dunnage product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a compact dunnage conversion machine is designed with laterally-spaced supports and open-sided housing, then ease of maintenance and inspection is improved, but device complexity increases
Solution Approach 1:
The housing is divided into multiple sides with selective openings, allowing maintenance personnel to access different components from different directions. The support structure is segmented into laterally-spaced individual supports rather than a continuous frame, enabling modular access and simplifying maintenance operations without requiring complete disassembly.
2Reliability
If floating components are used in the feeding assembly, then material jamming is reduced, but device complexity increases
Solution Approach 1:
The feeding assembly incorporates floating components that can dynamically adjust their position in response to material feed variations. Instead of fixed rigid connections, the floating elements move freely within defined limits, automatically compensating for misalignments and preventing jamming conditions without requiring complex control systems.
3Manufacturing precision
If separate paths are used for directing plies, then uniform tension is maintained, but device complexity increases
Solution Approach 1:
The sheet stock material is divided into separate plies, each directed through its own dedicated path within the forming assembly. This segmentation ensures that each ply experiences independent tension control, preventing the cumulative tension variations that would occur if multiple plies were routed through a shared path. The separate paths are configured to be as similar as possible in length and geometry to maintain consistency.
4Volume of moving object
If a compact design is implemented, then space utilization is improved, but maintenance accessibility worsens
Solution Approach 1:
The machine employs an open-sided housing design that provides maintenance access from the lateral dimensions rather than requiring top or bottom access. This dimensional approach allows the machine to maintain a compact vertical footprint while providing adequate clearance for maintenance personnel to work on internal components from the sides, effectively resolving the space-accessibility conflict.
Data Source
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AI summary
A dunnage conversion machine includes a assembly having a of rotating members to feed stock material along a path between the rotating members mounted for rotation about respective axes to feed stock material along a path between the rotating members, and a chute that bounds the path between the rotating members. One of the rotating members and a portion of the chute are mounted for common movement toward and away from the other rotating member and another portion of the chute. The floating rotating member and floating portion of the chute are part of a subassembly that can be removed from the conversion assembly as a unit, separate from another portion of the chute and the other rotating member.