Web Material Winding Machine Transverse Cutting Mechanism
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Solution Overview
Problem
Existing machines for producing logs of web material face malfunctions and complexity in severing the web material when transitioning from one log to another, leading to unreliable and cumbersome operations.
Innovation Solution
A machine with an unwinding section, a winding station featuring guide members and a cutting device that transversally cuts the web material to create a loop, allowing for easy anchoring to a new tubular winding core, and a winding mandrel with rotary and reciprocating motion to form helically wound logs, along with a contact roller and movable arms for precise control and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the web material is severed using existing machines, then the log production process can continue, but the severing operation is subject to malfunctions and operational complexity
Solution Approach 1:
The patent extracts the severing operation from the winding process by positioning the cutting device to cut the web material before it enters the winding station. This separation allows the severing function to be independently controlled and simplified, removing it from the complex coordination required during active winding operations.
Solution Approach 2:
The cutting device performs the severing action in advance, creating a pre-cut web material that is then easily handled during the transition between logs. The guide members prepare the web material by forming loops and positioning cut portions beforehand, so that when log replacement is needed, the anchoring operation is already simplified and ready to execute.
2Ease of operation
If guide members form loops of web material, then anchoring to new winding cores becomes easier, but the winding station requires additional components and space
Solution Approach 1:
The guide members act as intermediary elements between the cutting device and the winding core. They receive the pre-cut web material, form it into loops, and position it for anchoring to the new winding core. This intermediary function simplifies the final anchoring operation while consolidating the additional components into a dedicated guiding mechanism rather than dispersing complexity throughout the entire winding station.
3Length of moving object
If the cutting device cuts downstream of the loop formation, then a sufficient strip portion remains for anchoring, but the cutting position requires precise coordination with guide members
Solution Approach 1:
The patent segments the web material handling into distinct functional zones: the cutting device creates a separation point, the guide members form loops in an intermediate zone, and the winding station receives pre-prepared material. This segmentation allows each component to operate independently at its optimal position, with the cutting device focused solely on severing and the guide members focused on loop formation and positioning, reducing the coordination burden.
Data Source
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AI summary
The machine (1) comprises: - an unwinding section (3) for unwinding parent reels (Ba, Bb) of web material (N; S); - at least one winding station (15) comprising a winding device (25) and further comprising: guide members for guiding the strip (S) of web material, configured to form at least a loop of web material between a guide roller (43) and a log (B); and a cutting device (61) for transversally cutting the strip (S) of web material in an intermediate position between the log (B) and the guide roller (43), thus generating a tail edge, remaining on the log (B) being formed, and a leading edge, remaining fastened to the guide roller (43).