Rotating Chassis for Continuous Chopping Machine Maintenance
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Solution Overview
Problem
Current methods for maintaining chopping machines in the production of chopped strands, such as glass fibers, require production stoppages for replacing worn wheels, leading to productivity losses and unnecessary scrap production, as existing solutions like single-bushing or double-head machines still result in downtime and scrap during maintenance.
Innovation Solution
A method and device allowing for the continuous operation of a chopping machine by rotating a chassis-mounted first chopping assembly out of operation and bringing a second assembly into position without interrupting the strand drawing process, enabling seamless switching between the two assemblies without restarting the production line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If production stoppages are implemented to replace worn chopping wheels, then maintenance operations can be performed, but productivity is reduced and scrap production increases
Solution Approach 1:
The chopping machine is divided into multiple independent chopping units (first chopping unit, second chopping unit) that can operate separately. This segmentation allows one unit to be maintained while the other continues production, eliminating the need for complete production stoppage during wheel replacement
Solution Approach 2:
The second chopping unit is prepared in advance with new chopping wheels installed before the first unit needs maintenance. This preliminary preparation ensures that when the first unit requires maintenance, the second unit is already ready to take over immediately without production interruption
2Ease of repair
If one-to-one association of chopping machine and bushing is implemented, then maintenance can be performed on individual units, but space requirements increase and productivity gains are limited
Solution Approach 1:
Multiple chopping units are merged into a single integrated chopping machine structure, sharing common components such as the drive system, control unit, and housing. This merging reduces spatial requirements compared to separate machines while maintaining the ability to maintain individual units independently
3Ease of repair
If double-head chopping machines are used, then wheel changing can be done in parallel, but production is still interrupted during machine pivoting and restart phases
Solution Approach 1:
The system ensures continuous production by maintaining one operational chopping unit throughout the maintenance of the other. The switch between units is designed to be seamless, with the operational unit continuing to process material without interruption, eliminating downtime during wheel changing operations
Data Source
AI summary
A method enabling maintenance intervention on a chopping machine. In the method at least one strand is drawn through a first chopping assembly in operation, the first chopping assembly including a first chopping wheel and a first anvil wheel, the first chopping assembly being secured to a chassis mounted to move about an axle. The chassis is rotated about its axle until a second chopping assembly initially in a position of non-operation is brought into the vicinity of the strand, the second chopping assembly being secured to the chassis and including a second chopping wheel and a second anvil wheel. The second chopping assembly is set in operation and the strand is led in between the second chopping wheel and the second anvil wheel. The first chopping assembly is brought into the position of non-operation.