Movable Infeed Rolling Bed for Cigarette Creasing Prevention
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Solution Overview
Problem
In filter-tip attachment machines, the initial rolling step of cigarettes and filters is critical and prone to creasing due to high rotational acceleration, which affects the quality of the rolled products, especially at higher production speeds.
Innovation Solution
The rolling process is divided into an infeed and outfeed step, using a movable infeed rolling bed and a fixed outfeed bed to control rolling speeds and angles, preventing creasing by ensuring uniform wrapping of patches around cigarette and filter pieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed tile is used as the rolling channel wall, then the structure is simple, but the groups undergo very high rotational acceleration causing creasing and deformation
Solution Approach 1:
The invention replaces the fixed tile with a movable rolling channel wall that can move in the direction of group advancement. This dynamic element moves at a speed lower than the feed drum's tangential speed, creating a speed gradient that reduces rotational acceleration and prevents creasing while maintaining structural simplicity
Solution Approach 2:
The invention changes the speed parameter of the rolling channel wall from stationary (0 speed) to a controlled moving speed that is lower than the feed drum's tangential speed. This parameter change creates a gradual acceleration profile that prevents patch creasing while maintaining manufacturing efficiency
2Productivity
If the machine speed is increased to improve productivity, then production speed increases, but creasing and deformation worsen
Solution Approach 1:
The movable rolling channel wall dynamically adjusts the acceleration profile regardless of machine speed. By moving at a controlled speed lower than the feed drum's tangential speed, it ensures gradual acceleration even at high production speeds, preventing creasing while maintaining high productivity
Solution Approach 2:
The movable rolling channel wall acts as an intermediary between the feed drum and the fixed structure. It mediates the speed transition by moving at an intermediate speed that is lower than the feed drum's tangential speed, creating a buffer that prevents sudden acceleration and patch creasing at any production speed
Data Source
AI summary
A device for rolling cigarettes, filter cigarettes or filters, including a rolling channel delimited, at one end, by a rolling portion of a feed conveyor, and at the other end, by a rolling unit which includes an infeed rolling bed and an outfeed rolling bed located in succession along the travelling direction of the rolling channel and defining an infeed stretch and an outfeed stretch of the rolling channel, respectively. The infeed rolling bed is movable along the travelling direction independently of the outfeed rolling bed to produce different rolling modes along the infeed stretch and along the outfeed stretch.