Horizontal Transverse Sealing Unit Independent Drive Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing horizontal transverse sealing units for tubular bagging machines face limitations in accelerating and decelerating sealing jaws during the sealing process, leading to reduced performance and limited compensation for deviations in pack lengths from the web length, due to the need for synchronous operation of all sealing jaws.
Innovation Solution
The implementation of independently drivable sealing drives for each pair of sealing jaws allows for asynchronous movement, enabling a longer window for limping movements and increased acceleration control, while also allowing for simultaneous sealing of both ends of packs and independent optimization of each sealing jaw's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a common sealing drive drives all sealing jaws synchronously, then the sealing process is coordinated, but the available time for limping movement is short, resulting in high accelerations and reduced performance
Solution Approach 1:
The common sealing drive is segmented into multiple independent sealing drives, with each sealing jaw having its own drive mechanism. This allows each sealing jaw to operate independently during the sealing process while still maintaining coordination when needed, thereby extending the available time for limping movement without compromising sealing coordination.
2Adaptability or versatility
If sealing jaws are accelerated and decelerated in limping movement during short periods, then pack length deviations can be compensated, but high accelerations are required, reducing performance
Solution Approach 1:
The sealing drive system is made dynamic by allowing each sealing jaw to independently adjust its speed and acceleration profiles. This enables extended limping movement periods with lower accelerations, as each sealing jaw can adapt its motion to compensate for pack length deviations over a longer time window rather than requiring rapid acceleration changes.
3Productivity
If all sealing jaws are driven synchronously, then the sealing process is coordinated, but the system cannot independently optimize each sealing jaw's movement, limiting performance
Solution Approach 1:
The sealing drive system is divided into independent modular units, with each sealing jaw having its own drive mechanism. This segmentation enables independent optimization of each sealing jaw's movement parameters while maintaining the ability to coordinate sealing operations when required, thereby improving overall productivity and operational flexibility.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a horizontal transverse sealing unit, in particular for a horizontal tubular bag machine for sealing at least one tubular film around at least one object to be packaged, having a first and a second rotational axis (18a, 20a) which are parallel to each other and at least two sealing jaw pairs (26a, 28a and 30a, 32a) which are each formed by at least one sealing jaw (26a, 30a) rotating around the first rotation axis (18a) and at least one sealing jaw (28a, 32a) rotating around the second rotation axis (20a), such that, during a sealing process, the sealing jaws (26a, 28a) of a sealing jaw pair (26a, 28a) approach each other and material layers can be sealed between the sealing jaws (26a, 28a) under exertion of pressure. According to the invention, at least two independently drivable sealing drives of the horizontal transverse sealing unit are provided to drive at least two sealing jaw pairs (pair 26a, 28a and pair 30a, 32a) independently of each other.