Turret Slitter Rewinder Draw-In Without Adhesive Tape
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Solution Overview
Problem
Existing methods for drawing-in the free edge of flexible materials onto tubular cores in slitter rewinders require manual intervention and the use of double-sided adhesive tape, which is inefficient, wastes material, deteriorates the cores, and reduces productivity.
Innovation Solution
A device with an upper cutting unit and a lower drawing-in unit, operated by cylinder-piston groups, performs automatic cutting and drawing-in without adhesive tape, ensuring the free edge is mechanically fixed onto the tubular core during the reel change process, maintaining core integrity and eliminating operator intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual drawing-in with double-sided adhesive tape is used, then the free edge can be fixed onto the tubular core, but operator intervention is required and productivity is reduced
Solution Approach 1:
The system performs the drawing-in operation automatically without operator intervention. The cutting unit cuts the flexible material and the drawing-in unit automatically draws the free edge onto the tubular core using mechanical means, making the system self-sufficient and eliminating the need for manual adhesive tape application
Solution Approach 2:
The patent replaces the adhesive-based mechanical fixing system with a purely mechanical drawing-in system. The drawing-in unit uses mechanical forces to pull and secure the free edge onto the tubular core, eliminating the need for double-sided adhesive tape and manual operator intervention
2Reliability
If double-sided adhesive tape is used for drawing-in, then the free edge can be fixed onto the tubular core, but the last stretch of flexible material must be discarded
Solution Approach 1:
The invention extracts and eliminates the adhesive tape from the system entirely. By using a mechanical drawing-in unit that captures and secures the free edge without requiring adhesive materials, the system prevents the waste of the last stretch of flexible material that would otherwise be contaminated by adhesive tape
Solution Approach 2:
The patent eliminates the need for disposable adhesive tapes by implementing a reusable mechanical drawing-in system. The mechanical forces applied by the drawing-in unit are sufficient to secure the free edge without requiring consumable adhesive materials, thereby eliminating material waste
3Reliability
If double-sided adhesive tape is applied to tubular cores, then the free edge can be fixed onto the tubular core, but the surface of the tubular core is deteriorated
Solution Approach 1:
The patent replaces the adhesive-based system with a mechanical drawing-in system that uses controlled mechanical forces to secure the free edge onto the tubular core. This mechanical approach, when properly controlled, avoids the surface deterioration caused by adhesive tapes while maintaining reliable fixing
Solution Approach 2:
The invention changes the physical parameters of the drawing-in process from chemical adhesion to mechanical force. By controlling the mechanical parameters (force, position, timing) of the drawing-in unit, the system achieves reliable fixing without the harmful chemical effects of adhesive tapes on the core surface
4Manufacturing precision
If manual positioning of double-sided adhesive tape is performed, then the tape can be positioned on each tubular core, but operator time is consumed and productivity is reduced
Solution Approach 1:
The system performs the positioning and application of the drawing-in mechanism automatically. The cutting unit and drawing-in unit are positioned and operated autonomously, eliminating the need for operator intervention in the precise positioning task that would otherwise require manual adhesive tape application
5Extent of automation
If automatic application of double-sided adhesive tape is used, then operator intervention is reduced, but the flexible material must be halted at limited speed
Solution Approach 1:
The patent replaces the adhesive application system with a mechanical drawing-in system that operates continuously. The mechanical drawing-in unit can function at the normal operating speed of the flexible material feeding, eliminating the need to halt at limited speeds required by adhesive application systems
Data Source
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AI summary
A device for automatic cutting and drawing-in (L) onto a tubular core (T) a flexible material in double-turret slitter rewinders provided with a movable carriage carrying a pressing roller (P) of the reels being wound, comprising: an upper cutting unit (1) rotating on the movable carriage and equipped at its free end with rods (8) which engage a flexible material (L) arranged between said pressing roller (P) and a daughter-reel in unloading position, and lead up to the initial drawing-in; an automatic cutting device which cuts the flexible material (L); and a lower drawing-in unit (2) on which an insertion sheet (13) of the flexible material (L) is provided, which interferes with the free edge of the flexible material (L) hanging from said rods (8) and raises it up to achieve a complete drawing-in thereof.