Axial Centering of Rod-Like Articles Using Distributed Pushers
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Solution Overview
Problem
Existing apparatuses in the tobacco industry fail to center rod-like articles of varying lengths accurately in a single plane during conveyance on drum conveyors, leading to inconsistencies in cutting processes due to length tolerance variations.
Innovation Solution
An apparatus with pusher elements driven by a common unit, distributing force axially through a cushioning unit with resilient elements, such as springs, to position the centers of rod-like articles or groups in a single plane, using a cam or pneumatic mechanism for precise shifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single pusher element is used to shift rod-like articles in the flute, then the device structure is simple, but articles of varying lengths cannot be centered accurately in a single plane
Solution Approach 1:
The single pusher element is divided into multiple pusher elements (first pusher element and second pusher element) that can independently act on different portions of the rod-like article. This segmentation allows each pusher to apply force to specific regions, enabling accurate centering of articles with varying lengths by distributing the centering action across multiple points rather than relying on a single point of contact.
2Manufacturing precision
If multiple independent pusher elements are used to center articles of varying lengths, then centering precision is improved, but the device complexity increases
Solution Approach 1:
Multiple pusher elements are merged into a single integrated pushing mechanism that acts on the rod-like article as a unified system. The first and second pusher elements are connected through a common actuating mechanism, allowing them to move in coordination. This merging approach achieves accurate centering of variable-length articles while avoiding the complexity of completely independent pusher systems, as the shared mechanism synchronizes the action of multiple pushers.
Solution Approach 2:
The pushing mechanism is designed with universal functionality to handle rod-like articles of any length within the flute. The mechanism can adapt its action to different article lengths by distributing force through multiple pusher elements that contact the article at appropriate positions. This multi-functional design allows the same mechanism to center both short and long articles accurately without requiring length-specific adjustments or separate mechanisms.
3Reliability
If articles are shifted to achieve repeatable positions relative to the drum surface, then cutting consistency is improved, but articles of varying lengths cannot be centered in a single plane
Solution Approach 1:
The centering action is segmented into multiple independent pusher elements that can be selectively activated or positioned based on article length. This allows the mechanism to first establish repeatable positioning relative to the drum surface for cutting consistency, then apply additional segmented pushing forces to center articles of varying lengths in a single plane, achieving both reliability and precision simultaneously.
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 delicate and damage-free positioning of rod-like articles or groups in a single plane, accommodating varying lengths, ensuring repeatable and precise cutting across all articles irrespective of their length, enhancing the efficiency of the cutting process.
Implementation Method 1
the apparatus is provided with pusher elements of a shifting mechanism acting on the rod-like article or the group of rod-like articles so as to change their position in the flute
Data Source
AI summary
Apparatus (1, 1′) for axial centring of a rod-like article (4, 4′) or a group (30) of rod-like articles wherein the rod-like article (4, 4′) or the group (30) of rod-like articles is conveyed in a flute (3) situated on the circumference of a drum conveyor (2), whereas the length of the article (4, 4′) or the total length of articles in the group (30) may vary, provided with pusher elements (5) acting on the rod-like article (4, 4′) or the group (30) of rod-like articles, characterized in that the pusher elements (5) of a shifting mechanism (13) are driven by a common driving unit (24, 24′) and are connected in such a way that the force exerted by the driving unit (24, 24′) is distributed to the pusher elements (5) acting axially on the rod-like article (4, 4′) or the group (30) of rod-like articles. The object of the application is also a method of axial centring of the rod-like article (4) or the group (30) of rod-like articles wherein the rod-like article (4, 4′) or the group (30) of rod-like articles is conveyed in the flute (3) situated on the circumference of the drum conveyor (2), by means of the pusher elements (5), whereas the length of the article (4, 4′) or the total length of articles in the group (30) may vary, characterized in that the force exerted by the driving unit (24) is distributed to the pusher elements (5) of the shifting mechanism (13) acting axially on the rod-like article (4, 4′) or the group (30) of rod-like articles.