Cigarette Packing Machine Inner Foil Feed Station
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Solution Overview
Problem
High-speed foil strip travel in modern cigarette packing machines makes precise positioning of inner packing material challenging, leading to suboptimal packet quality, and proposed solutions like using double-width foil strips with longitudinal and transverse cutting are complex to implement.
Innovation Solution
A packing machine design with seven work stations, including a feed station for inner packing material where sheets are fed with long sides perpendicular to the path, allowing precise positioning and simultaneous processing of three groups of cigarettes, reducing the average traveling speed of the foil strip and enabling accurate packaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the average travelling speed of the foil strip is increased to achieve high output rates, then productivity is improved, but manufacturing precision deteriorates
Solution Approach 1:
The packing machine is divided into seven distinct work stations (forming station, first folding station, collar feeding station, second folding station, inner packing material feeding station, outer packing material feeding station, and exit station). This segmentation allows each station to perform its function independently at optimized speeds, with the foil strip being processed in controlled intervals rather than continuous high-speed motion, thereby maintaining positioning precision while achieving high overall productivity through parallel processing of multiple cigarette groups.
Solution Approach 2:
The machine employs dynamic control of the foil strip feeding mechanism, adjusting the feeding speed and timing to match the positioning requirements at each work station. The foil strip is fed at controlled intervals corresponding to the formation and processing of cigarette groups, allowing the system to dynamically adapt between high-speed production and precise positioning requirements throughout the packing cycle.
2Manufacturing precision
If one foil strip of double width is used and cut longitudinally into two strips to reduce travelling speed, then positioning precision is improved, but device complexity increases
Solution Approach 1:
Instead of using a complex double-width foil strip system with longitudinal and transverse cutting operations, the invention extracts and uses separate standard-width foil strips for each packing line. Each foil strip is fed independently through its own feeding mechanism, eliminating the need for longitudinal cutting operations while maintaining positioning precision through dedicated feeding control for each strip.
3Manufacturing precision
If the foil strip is cut transversely to separate sheets for each cigarette group, then positioning precision is improved, but loss of time increases
Solution Approach 1:
The foil strips are pre-cut into individual sheets offline before being fed into the packing machine. This preliminary action separates the cutting operation from the main packing process, allowing the cutting to be performed at optimized speeds without impacting the high-speed packing cycle. The pre-cut sheets are then fed continuously to the work stations, eliminating time losses associated with on-line transverse cutting operations.
Data Source
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AI summary
A method and packing machine (1) for producing packets (2) of cigarettes, whereby a group (4) of cigarettes is fed by a packing conveyor (25) along a packing path (P1) and through a feed station (24b) for feeding sheets (5) of inner packing material, each of which is rectangular with two long sides and two short sides; a feed conveyor (26) feeds each sheet (5) of inner packing material through the feed station (24b) and along a feed path (P2), perpendicular to the packing path (P1), so that a respective group (4) of cigarettes intercepts the sheet (5) of inner packing material, thus folding the sheet (5) of inner packing material into a U about the group (4) of cigarettes; and each sheet (5) of inner packing material is fed through the feed station (24b) and along the feed path (P2) with its long sides perpendicular to the feed path (P2), and its short sides parallel to the feed path (P2).