Stitcher Wire Feed Control for Unknown Paper Bundle Thickness
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Solution Overview
Problem
Existing stitchers waste resources and incur costs due to the need for test wire driving when thickness information of the next paper bundle is unknown, leading to inefficient operations and environmental impact.
Innovation Solution
A control method and device for a stitcher that determines if thickness information for the next paper bundle is available, and if not, controls the wire feed unit to refrain from supplying a wire, thereby optimizing wire length based on known thickness information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the stitcher operates continuously without knowing the next paper bundle thickness, then productivity is maintained, but wire length may be unsuitable leading to defective products
Solution Approach 1:
The system performs preliminary acquisition of thickness information for the next paper bundle before the current stitching cycle completes. By obtaining this information in advance through communication with upstream equipment or sensors, the wire feed unit can prepare the appropriate wire length beforehand, ensuring both continuous operation and correct wire length for the next bundle.
Solution Approach 2:
The system implements a feedback mechanism where thickness information from the next paper bundle is communicated to the control unit, which then adjusts wire feeding accordingly. This closed-loop control ensures that wire length is automatically adapted to match the actual thickness of each paper bundle, preventing defects while maintaining continuous production.
2Manufacturing precision
If test wire driving is performed when thickness information is unavailable, then the stitcher ensures correct wire length for the next paper bundle, but resources are wasted
Solution Approach 1:
Instead of performing test wire driving as a fallback, the system proactively acquires thickness information for the next paper bundle in advance. This preliminary action eliminates the need for test operations, ensuring correct wire length from the start and preventing waste of both wire and paper bundles that would otherwise be consumed during testing.
Solution Approach 2:
The system uses its own control unit and communication capabilities to automatically obtain thickness information without requiring external test operations. The wire feed unit self-adjusts based on received information, making the system self-sufficient and eliminating resource-wasting test procedures.
3Manufacturing precision
If the wire feed unit prepares wire based on current paper bundle thickness, then wire length matches current bundle, but it may not suit the next paper bundle of different thickness
Solution Approach 1:
The system prepares wire for the next paper bundle in advance by acquiring its thickness information before the current cycle completes. This allows the wire feed unit to pre-position the correct wire length that will be needed for the next bundle, ensuring both precision and adaptability when the bundle changes.
Solution Approach 2:
The system dynamically adjusts wire feeding based on real-time or near-real-time thickness information of the next paper bundle. Rather than using a fixed or lagging reference, the wire feed unit continuously adapts its operation to match the actual requirements of each bundle, enabling seamless transitions between different thicknesses.
Data Source
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AI summary
A stitcher or stapler includes a stitcher head 15 configured to perform a reciprocating movement and a wire feed unit 12 configured to feed a wire to the stitcher head and performs wire stitching on a paper bundle arranged at a wire stitching position in each cycle of the reciprocating movement of the stitcher head. The stitcher control device 50 includes: a determination unit 62 that determines in each cycle of the stitcher head whether or not thickness information on a paper bundle to be subjected to wire stitching in a next cycle is acquired; and a wire feed control unit 63 that, when it is determined that the thickness information on the paper bundle to be subjected to wire stitching in the next cycle is not acquired, controls the wire feed unit not to supply a wire in the current cycle.