Rotary Cutter for Continuous 3D Packaging Production
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Solution Overview
Problem
Existing methods for manufacturing three-dimensional packaging products from paper webs are discontinuous and inefficient, requiring interruption of the production process to cut the preformed product to the desired length, which affects productivity and economic viability.
Innovation Solution
A device and method that continuously form a three-dimensional packaging product by preforming a paper web into a spiral shape, using embossing wheels to create crumple cavities, and a rotary cutter with a cutting edge that rotates tangentially to the paper web path, allowing seamless cutting without interrupting the production flow, ensuring consistent conveying speed throughout the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a knife is fixedly attached to the tubular inside of the housing for tearing off the preformed paper web section, then the operator can produce ready-made packaging products, but the conveyor drive device must be stopped to carry out the tearing-off process, resulting in discontinuous production
Solution Approach 1:
The patent applies the dynamics principle by transforming the stationary knife into a rotating cutter that moves synchronously with the paper web. The rotary cutter rotates in the direction of paper web movement, and its peripheral speed is matched to the conveying speed, allowing continuous cutting without stopping the production line. This dynamic conversion enables the cutting function to be performed continuously while maintaining production flow.
Solution Approach 2:
The patent implements continuity of useful action by ensuring the rotary cutter operates continuously during paper web conveyance. The cutter rotates同步 with the paper web movement, and the cutting action occurs continuously as the paper web passes through, eliminating idle stopping time and maintaining uninterrupted production throughout the cutting process.
2Productivity
If the peripheral speed of the cutting edge is matched to the conveying speed of the paper web, then seamless cutting without interrupting production flow is achieved, but the cutting mechanism becomes more complex
Solution Approach 1:
The patent applies the merging principle by integrating the rotary cutter directly into the existing conveyor system. The cutter is mounted on the conveyor frame and shares the same drive mechanism or synchronized drive, combining the cutting function with the conveying function. This integration reduces the need for separate independent cutting and conveying systems, thereby limiting the increase in overall device complexity.
Solution Approach 2:
The rotary cutter serves multiple functions: it cuts the paper web, synchronizes with the conveying speed, and can be integrated with the drive system. This multi-functionality reduces the need for additional specialized components, as the cutter performs both cutting and speed-matching roles that would otherwise require separate mechanisms.
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
Enables the continuous and uninterrupted production of three-dimensional packaging products, improving efficiency and reducing production time while maintaining product quality, thus enhancing the economic viability of the manufacturing process.
Implementation Method 1
the middle area can then be plastically deformed by means of an embossing wheel pair, so that a sequence of embossing valleys and embossing regions can also be introduced
Implementation Method 2
The cutting edge extends transversely to the conveying direction of the paper web. The blade lies parallel to the axis of rotation of the rotary cutter and rotates on a cylindrical orbit, which the conveying path of the paper web crosses essentially tangentially
Data Source
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AI summary
In a device for the machine production of a three-dimensional packaging product from a section of a single- or multi-layer paper web formed in a predetermined manner, comprising a preforming station that forms the paper web into a three-dimensional packaging product with at least one crumple cavity extending in the web direction, and a cutting station adjoining the preforming station in the conveying direction of the paper web, which cuts a paper web section to the desired length of the packaging product from the preformed paper web, it is provided that the cutting station has a rotary cutter whose cutting edge lies transversely to the conveying direction in which the paper web section leaves the preforming station, wherein a circulating path of the cutting edge is arranged such that the cutting edge crosses a conveying path of the paper web section as it circulates.