Symmetric Band Cutting and Connecting Device
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Solution Overview
Problem
Existing unrolling machines face challenges in achieving precise and rapid connection of bands while ensuring continuity of material feed, often requiring complex devices and large space due to the need for precise positioning and multiple adhesive applications, which can be inefficient for thick materials.
Innovation Solution
A method and device for cutting and connecting two bands end-to-end in an unrolling machine, featuring symmetric connection assemblies with a cutting device that simultaneously cuts both bands, immobilizes them, applies adhesive tape for connection, and disengages cut portions to facilitate seamless joining, allowing for a simpler and more compact setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If complex connection assemblies with multiple adhesive applications are used, then connection precision is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent merges the cutting and connection operations into a single integrated assembly. The connection assembly includes a cutting device with a blade that can cut the band, and an adhesive application device that applies adhesive to the cut end. This integration eliminates the need for separate complex connection assemblies and reduces the overall device complexity while maintaining connection precision through the coordinated action of cutting and adhesive application in one location.
Solution Approach 2:
The connection assembly is designed as a multi-functional unit that performs multiple operations: cutting the band with a blade, applying adhesive to the cut end, and positioning the new band. This universal assembly replaces what would traditionally require multiple separate devices, reducing space requirements while maintaining the precision needed for accurate band connection.
2Reliability
If multiple adhesive applications are performed, then connection reliability is improved, but cycle time increases
Solution Approach 1:
The patent applies adhesive to the cut end of the band immediately after cutting, before the band is fully positioned or before any significant time passes. This preliminary adhesive application ensures that the adhesive is ready and in place to provide reliable bonding as soon as the new band is brought into contact with the cut end, eliminating delays associated with waiting for adhesive to set or requiring multiple sequential application steps.
Solution Approach 2:
The connection process maintains continuous useful action by seamlessly integrating the cutting operation with the adhesive application operation. The blade cuts the band, and the adhesive application device immediately applies adhesive to the fresh cut end in the same operational sequence. This continuity ensures that the adhesive is applied while the cut end is still accessible and in the correct position, providing reliable connection without the time loss associated with interrupting the process for multiple separate adhesive applications.
3Adaptability or versatility
If thick materials are processed, then material versatility is improved, but connection effectiveness decreases
Solution Approach 1:
The patent applies adhesive locally and precisely to the cut end of the band, creating a concentrated adhesive layer exactly where needed for connection. This localized adhesive application ensures that sufficient adhesive is applied to the cut end surface, providing effective bonding even for thick materials. The adhesive is applied directly to the cut end rather than requiring extensive adhesive coverage, maintaining connection effectiveness across different material thicknesses.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables a precise, efficient, and compact connection process that maintains continuity of the material feed, reducing cycle time and space requirements while ensuring effective bonding for various material thicknesses.
Implementation Method 1
transferring, in the connection zone, the piece or the two pieces of adhesive tape, simultaneously or successively, by applying it to one of the sides, or by applying them each on one side, of the respective ends of the cut upstream and downstream band portions to be connected
Data Source
AI summary
A method for cutting and connecting two bands end to end and which are at a stop, namely a first band ensuring the feed, and a second replacement band, in an unrolling machine including a cutting and connecting device including two connection assemblies arranged symmetrically with respect to a cutting and connection plane is provided. Utilizing the unrolling machine the method includes preparation of the second band, then immobilization of the bands in the plane, of simultaneous and transverse cutting of the latter, of disengagement of the cut portions not to be connected, and of end-to-end connecting of the cut portions thereof to be connected. A cutting and connecting device and a machine enabling the implementation of the method is also provided.