Disc Blade Replacement Mechanism for Wound Web Log Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing cutting machines for logs of wound web material, such as tissue paper, face challenges in efficiently replacing disc-shaped cutting blades, which results in prolonged downtime, increased production costs, and potential quality issues due to the hazardous and cumbersome nature of the replacement process.
Innovation Solution
A method and apparatus for cutting logs of wound web material that includes a feeding path with a cutting head equipped with a disc-shaped cutting blade, a storage unit for new blades, and a handling member to facilitate the replacement of worn blades, allowing for quick and safe swapping without requiring the cutting head to move, thus minimizing downtime and improving safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual replacement of disc-shaped cutting blades is performed, then the cutting machine can be maintained and continued to operate, but the replacement process is hazardous and time-consuming (20-30 minutes), requiring operator access to narrow spaces with sharp blades
Solution Approach 1:
The patent extracts the dangerous replacement operation from the narrow internal space of the cutting machine by providing external access to the cutting head. The handling member allows operators to remove and replace cutting blades from outside the machine, eliminating the need to access hazardous internal areas and reducing replacement time from 20-30 minutes to just a few minutes.
Solution Approach 2:
The patent introduces a handling member as an intermediary tool that mediates the replacement process. This handling member engages with the cutting blade and the cutting head, providing a safe interface for operators to manipulate the blade without direct hand contact with the sharp cutting edge, thereby eliminating safety hazards while maintaining operational efficiency.
2Manufacturing precision
If disc-shaped cutting blades are frequently replaced due to wear, then cutting precision is maintained, but production costs increase and machine availability decreases
Solution Approach 1:
The patent implements preliminary action by providing a storage unit that pre-stores multiple replacement cutting blades. This allows operators to immediately swap in a fresh blade without delay when the current blade becomes worn, ensuring cutting precision is maintained while eliminating the time loss associated with preparing replacement blades during the replacement process.
Solution Approach 2:
The patent extracts the time-consuming aspects of blade replacement (accessing narrow spaces, manual handling in hazardous conditions) by providing external access mechanisms and automated handling members. This reduces the replacement process from 20-30 minutes to a quick swap operation, maintaining productivity while preserving cutting precision through timely blade replacement.
3Ease of repair
If operators manually access the cutting head for blade replacement, then blade replacement can be performed, but operator safety is compromised due to exposure to sharp blades and narrow confined spaces
Solution Approach 1:
The patent introduces a handling member as an intermediary tool that completely eliminates direct operator contact with the sharp cutting blade. The handling member engages with the blade and cutting head, allowing operators to perform replacement operations from a safe external position, thereby maintaining ease of repair while removing the safety hazard of operator exposure to sharp blades and confined spaces.
Solution Approach 2:
The patent extracts operators from the hazardous narrow internal space of the cutting machine by providing external access to the cutting head. This allows blade replacement to be performed from outside the machine, eliminating operator exposure to sharp blades and confined spaces while maintaining the ability to perform repairs efficiently.
Data Source
AI summary
The cutting machine for cutting logs of web material, includes a cutting head arranged along the feeding path of the logs. The cutting head includes a coupling for a disc-shaped cutting blade and is designed to impart the disc-shaped cutting blade a rotary motion around the axis thereof and a cyclic movement to cut the logs into single rolls, and to allow the logs to move forward along the feeding path. The machine also includes a store unit for disc-shaped cutting blades associated with the cutting head. A handling member is provided to remove a worn disc-shaped cutting blade from the cutting head and replace the worn disc-shaped cutting blade with a new disc-shaped cutting blade taken from the store unit.