Sheet Manufacturing Apparatus Edge Surplus Crushing
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Solution Overview
Problem
Existing sheet manufacturing apparatuses for recycling used paper are bulky due to the presence of separate pulpers for cutting and surplus paper pieces, leading to inefficiencies in processing and waste management.
Innovation Solution
A sheet manufacturing apparatus with separate coarse crushing portions for surplus edges, allowing for immediate and accurate crushing of surplus portions as they form, which can then be easily recycled, along with a control unit to adjust crushing speeds based on transport speed and independent operation of crushing portions to conserve energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate pulpers are provided for cutting and surplus paper pieces, then the surplus paper pieces can be processed, but the apparatus size increases
Solution Approach 1:
The patent combines the surplus paper piece processing function with the existing pulper system by adding a conveyance mechanism that directs surplus paper pieces to the pulper. This merging approach allows the same pulper to process both cutting waste and surplus paper pieces, eliminating the need for a separate pulper and reducing overall apparatus size while maintaining complete surplus paper processing capability
2Manufacturing precision
If multiple separate crushing portions are provided for different surplus portions, then crushing accuracy improves, but device complexity increases
Solution Approach 1:
The patent segments the surplus paper handling system into distinct conveyance paths and timing control mechanisms while using a single crushing portion. Different surplus portions (from different cutting positions) are conveyed to the crushing mechanism at different times through separate conveyance paths, allowing the single crusher to process each portion with appropriate timing and positioning, thereby maintaining crushing accuracy without increasing device complexity through multiple crushing units
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 apparatus reduces size and improves efficiency by allowing for immediate recycling of surplus materials, preventing waste and deformation, while conserving energy through independent operation of crushing portions.
Implementation Method 1
a first coarse crushing portion that coarsely crushes a first surplus portion generated by cutting the one edge portion by the cutting portion, and a second coarse crushing portion that coarsely crushes a second surplus portion generated by cutting the other edge portion by the cutting portion
Data Source
AI summary
A sheet manufacturing apparatus includes a sheet forming portion that forms a sheet using a material including fibers, a transport portion that transports the sheet, a cutting portion that cuts one edge portion and the other edge portion of the sheet positioned in a direction intersecting a transport direction of the sheet, a first coarse crushing portion that coarsely crushes a first surplus portion generated by cutting the one edge portion by the cutting portion, and a second coarse crushing portion that coarsely crushes a second surplus portion generated by cutting the other edge portion by the cutting portion.