Odd-Unit Rotary Transfer for Mixed-Length Rod Articles
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Solution Overview
Problem
Existing transfer devices for rod-shaped articles in the tobacco industry require an even number of working units, leading to complexity and limited flexibility in handling compositions of varying lengths, particularly when long and short units are mixed.
Innovation Solution
A method and device using a rotary transfer mechanism with working units that move along a closed path, allowing for an uneven number of units and maintaining article orientation, enabling flexible and simple transfer of rod-shaped articles with varying lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an even number of working units are used in the transfer device, then the device can handle alternating long and short units, but the device complexity increases
Solution Approach 1:
The patent applies asymmetry by allowing an odd number of working units in the transfer device, breaking the traditional symmetric even-numbered configuration. This asymmetric approach enables the device to handle alternating long and short units through a different mechanism: the platform rotates through 360 degrees and returns to the starting position, with the odd number of units creating a natural alternation pattern that eliminates the need for complex matching of even-numbered units to alternating unit types.
Solution Approach 2:
The patent inverts the traditional approach by using an odd number of working units instead of an even number. Rather than matching even-numbered units to alternating long and short compositions, the invention uses the odd number combined with a full 360-degree rotation and return to starting position to achieve the same handling capability with reduced complexity.
2Adaptability or versatility
If the transfer device is designed with fixed even number of working units, then it can match alternating long and short units, but the flexibility in choosing number of units is reduced
Solution Approach 1:
The patent applies dynamics by making the number of working units variable rather than fixed. The device can operate with an odd number of units, and the system adapts through the platform's rotation and return to starting position, allowing flexible configuration based on production needs without being constrained to a fixed even number.
Solution Approach 2:
The patent changes the parameter of working unit count from a fixed even number to a variable odd number. This parameter change, combined with the platform's rotational movement and return to starting position, provides flexibility in configuring the transfer device while maintaining its ability to handle alternating long and short units.
3Manufacturing precision
If a rotary transfer mechanism with closed path is used, then the spacing between working units remains uniform, but the mechanism complexity increases
Solution Approach 1:
The patent applies spheroidality by using a rotary platform with a closed circular path. The working units are positioned at uniform angular intervals around the platform, and as the platform rotates 360 degrees and returns to the starting position, each unit follows a curved trajectory that maintains uniform spacing throughout the transfer process, ensuring precise and consistent article placement.
Data Source
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AI summary
A method for transferring rod-shaped articles (11, 12), in particular for the tobacco industry, comprising the following steps: feeding an alternating succession of first and second rod-shaped articles (11, 12) along a direction perpendicular to the longitudinal axis of the articles (11, 12), wherein the first articles (11) differ in length from the second articles (12); picking up individual articles (11, 12) from the alternating succession by means of respective movable working units (32) of a transfer means (30) at a pickup station (P), the working units (32) being movable along a closed feed path; causing a movement of the working units (32), which carry the respective articles (11, 12), from the pickup station (P) to a release station (R) along a stretch of the feed path; releasing the individual articles (11, 12) from the working units (32) onto a forming beam (20) by an axial movement of the articles (11, 12) at the release station (R); wherein the working units (32) are equispaced from each other by a distance (D), measured along the feed path of the working units (32), adjusted and/or selected as a function of a mean length (l_m) of the first and second articles (11, 12).