Sheet Manufacturing Apparatus Front Rear Layout
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Solution Overview
Problem
Conventional wastepaper recycle apparatuses with a single-line structure are too large for installation in offices or warehouses, and maintenance and noise reduction are challenging due to the arrangement of processing units.
Innovation Solution
A sheet manufacturing apparatus with a front-and-rear two-line structure, where the forming unit is located at the front side and the defibrating unit at the rear side, allowing for a compact design, easier maintenance, and noise reduction by isolating the noisy defibrating unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single-line structure is used to arrange all processing units in a line, then the apparatus can process materials sequentially, but the apparatus becomes horizontally long and too large to be installed in an office or warehouse
Solution Approach 1:
The patent transitions from a single-line horizontal arrangement to a multi-dimensional layout where processing units are distributed across front and rear sides. The defibrating unit is positioned at the rear while the forming unit is at the front, creating a spatial arrangement that reduces horizontal length while maintaining processing functionality through vertical and depth-based positioning.
2Volume of stationary object
If the defibrating unit is positioned in the middle of the apparatus, then the apparatus structure is compact, but noise from the defibrating unit affects the operation area
Solution Approach 1:
The patent extracts the noisy defibrating unit from the central operation area and relocates it to the rear side of the apparatus. This separation isolates the noise-generating component from the operation area where the forming unit and control operations occur, reducing noise impact on operators and the operating environment.
3Device complexity
If the forming unit is positioned at the rear of the apparatus, then the apparatus structure is simplified, but troubleshooting and maintenance become more difficult when sheet transportation troubles occur
Solution Approach 1:
Instead of placing the forming unit at the rear for structural simplicity, the patent inverts the conventional arrangement by positioning the forming unit at the front side of the apparatus. This inversion makes the forming unit and associated sheet transportation paths more accessible from the front, facilitating easier troubleshooting and maintenance while maintaining a simplified overall structure through the rear placement of the defibrating unit.
4Volume of stationary object
If the catcher is positioned at the rear of the cyclone, then the cyclone structure is compact, but maintenance of the catcher becomes more difficult after a predetermined period of use
Solution Approach 1:
The patent positions the catcher at the front side of the apparatus rather than at the rear of the cyclone, utilizing the front-rear dimensional differentiation. This relocation to the front area, which is more accessible for maintenance operations, allows easier access to the catcher for periodic maintenance while the cyclone body remains compact through optimized internal structure.
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 compact design enables installation in smaller spaces like offices or warehouses, facilitates easier troubleshooting and maintenance, and reduces noise pollution by separating the noisy defibrating unit from the operation area.
Implementation Method 1
a defibrating unit that defibrates a raw material that contains fiber in air
Implementation Method 2
a heating roller for heating a deposited material
Implementation Method 3
a pressing roller for pressing the deposited material
Implementation Method 4
a classifying unit that classifies the defibrated material, and includes, a cyclone-shaped body
Data Source
AI summary
A sheet manufacturing apparatus includes a defibrating unit, a forming unit, and an operation unit. The defibrating unit defibrates a raw material that contains fiber in air. The forming unit forms a sheet by using at least a part of a defibrated material after defibration by the defibrating unit. The operation unit is for operation of the sheet manufacturing apparatus. When the side where the operation unit is located is defined as the front side, the defibrating unit is located at the rear side, and the forming unit is located at the front side.