Sheet Manufacturing Apparatus Vibration Isolation
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Solution Overview
Problem
Existing sheet manufacturing apparatuses face challenges in improving the weighing accuracy of paper pieces due to vibrations from compressor mechanisms and conveyors, as well as airflow interference with the weighing instruments.
Innovation Solution
The apparatus incorporates a measurement portion with a first frame portion, a second frame portion, a lid portion for weighing paper pieces, and a shutter portion to isolate the weighing area from airflow and vibrations, enhancing measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a weighing instrument is used to measure paper pieces, then weighing capability is provided, but weighing accuracy deteriorates due to vibrations from compressor mechanisms and conveyors
Solution Approach 1:
The frame is divided into a first frame portion supporting the weighing instrument and a second frame portion supporting the compressor mechanism, separating the vibration source from the sensitive measurement component
Solution Approach 2:
A vibration absorption portion is introduced as an intermediary element between the first and second frame portions to absorb and dampen vibrations before they can reach the weighing instrument
2Productivity
If airflow is used to transport paper pieces, then transport efficiency is improved, but weighing accuracy deteriorates due to airflow interference with the weighing instrument
Solution Approach 1:
The frame structure is segmented into distinct zones: a first space for weighing operations and a second space for airflow transport, preventing direct interference between the two functions
Solution Approach 2:
The first space is designed with specific local characteristics (enclosed structure away from airflow paths) to create a stable environment for weighing, while the second space maintains high-velocity airflow for efficient transport
Data Source
AI summary
A sheet manufacturing apparatus includes: a measurement portion that weighs paper pieces, in which the measurement portion includes: a first frame portion; a second frame portion separated from the first frame portion; a lid portion on which paper pieces to be weighed are placed in a closed state, and which transmits the weighed paper pieces to a downstream merging portion in an open state; a sensor portion that measures a mass of the paper pieces placed on the lid portion; and a shutter portion configured to close a space between the lid portion and the merging portion, the sensor portion is attached to the first frame portion, and the shutter portion is attached to the second frame portion.