Finger Roller for Packaging Tube Edge Separation
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Solution Overview
Problem
During short stops in packaging machine production, the longitudinal edges of the packaging material tube can adhere incorrectly, leading to tube bursting upon restart, necessitating thorough cleaning and additional downtime.
Innovation Solution
A movable finger roller mechanism is automatically activated during short stops to separate the longitudinal edges of the packaging material tube, preventing incorrect adherence by moving from an inactive to an operative position in response to the longitudinal sealing mechanism's movement, ensuring proper separation and preventing sticking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the machine stops during production, then the packaging process can be paused for maintenance or operator needs, but the longitudinal edges of the packaging material tube adhere incorrectly causing tube bursting upon restart
Solution Approach 1:
The movable finger roller is positioned to preemptively separate the longitudinal edges of the packaging material tube before they can adhere to each other during machine stops. By being in place and active during pauses, it prevents the sticking problem before it occurs, ensuring clean edges for restart.
Solution Approach 2:
The finger roller is designed to be movable rather than fixed, allowing it to dynamically adjust its position. It can move into the separation position during machine stops and retract during operation, adapting its function to the machine's operational state without requiring complex control systems.
2Reliability
If a mechanism is added to prevent edge adherence during stops, then tube bursting is prevented, but device complexity increases
Solution Approach 1:
The finger roller utilizes the existing reciprocating motion of the longitudinal sealing mechanism to which it is attached. As the sealing mechanism moves back and forth, the finger roller passively follows this motion, automatically positioning itself to separate edges during stops and retract during operation without requiring independent actuators or control systems.
Solution Approach 2:
The function of edge separation during stops is merged with the existing longitudinal sealing mechanism. The finger roller is attached to and moves with this mechanism, combining two functions (sealing and edge separation) into a single integrated system, thereby avoiding the need for a separate complexity-inducing mechanism.
3Ease of operation
If the movable finger roller is activated during short stops, then edge separation is maintained preventing sticking, but additional control mechanisms are required
Solution Approach 1:
The movable finger roller is designed to automatically perform its edge-separation function by exploiting the existing reciprocating motion of the longitudinal sealing mechanism. No external control signals, sensors, or additional actuators are needed - the mechanism serves itself by converting its own operational movement into the desired edge-separation action during stops.
Solution Approach 2:
The finger roller's position is dynamically determined by the motion state of the sealing mechanism itself. During reciprocating motion, it retracts to allow sealing; during stops, it moves forward to separate edges. This dynamic behavior is passive and automatic, requiring no additional control complexity beyond the existing mechanism's motion control.
Data Source
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AI summary
Device in a filling machine (1), comprising a longitudinal sealing mechanism which is movable between an operative position during production and an inactive position during a short stop, and further comprising a movable finger roller (40) which is automatically moved from an inactive position to an operative position during a short stop in production, in response to the movement of the longitudinal sealing mechanism, for separating the longitudinal edges of the packaging material tube such that they do not stick incorrectly to each other. The application also includes a method for preventing incorrect sticking of the packaging material and a filling machine.