Acute-Angle Suction Jaws for Bag Section Opening
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Solution Overview
Problem
Existing sack filling systems face inefficiencies in opening sack sections due to static charges and other negative influences, leading to increased cycle times and reduced process speed, as suction devices often fail to uniformly separate the sides of the sack section.
Innovation Solution
The opening device features suction cups arranged at an acute angle to the sack section, focusing the suction force on a smaller area to enhance the peeling effect, thereby improving the release of the sack section sides even under difficult conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If suction cups are arranged parallel to the sack section sides, then the suction device can easily be constructed, but the suction force is distributed over a larger area reducing the peeling effect
Solution Approach 1:
The suction cups are arranged asymmetrically at an acute angle (alpha) relative to the normal of the sack section side. This asymmetric angular arrangement concentrates the suction force on a smaller contact area, enhancing the peeling effect and reliably separating the sack section sides even under difficult conditions with static charges.
2Reliability
If suction cups are arranged at an acute angle to the sack section sides, then the peeling effect is enhanced and opening reliability improves, but the device complexity increases
Solution Approach 1:
The angular parameter (alpha) of the suction cup arrangement is optimized to be between 0° and 45° relative to the normal of the sack section side. This parameter change concentrates suction force effectively while keeping the mechanical structure relatively simple, balancing reliability improvement with acceptable device complexity.
3Device complexity
If standard suction arrangement is used, then the device structure is simple, but cycle time increases due to failed suction attempts
Solution Approach 1:
The asymmetric acute-angle arrangement of suction cups ensures reliable first-attempt opening by concentrating suction force, eliminating the need for follow-up attempts. This maintains structural simplicity while significantly improving productivity by reducing cycle time extensions caused by failed suction attempts.
4Device complexity
If suction force is distributed over large area, then the suction cup structure is simple, but the force concentration is insufficient to overcome static charges
Solution Approach 1:
By arranging suction cups at an acute angle rather than parallel to the sack section, the suction force is concentrated on a smaller contact area. This asymmetric arrangement generates sufficient force density to overcome static charges and adhesion forces, maintaining simple suction cup structure while achieving the required force concentration.
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
This design reduces the risk of faulty suction, decreases cycle time extensions, and enhances the overall operating speed of the bag filling system by ensuring consistent and effective opening of the sack section.
Implementation Method 1
a suction device (20) for sucking in the two sides (212, 214) of the sack section (210) with a movably mounted first suction cup (22) on the first side (212) of the sack section (210) and a movably mounted second suction cup (24) on the second side (214) of the sack section (210)
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
The invention relates to an opening device (10) for opening a bag section (210) of a film web (200) in a bag filling machine (100) for filling with bulk material, comprising a suction device (20) for suctioning the two sides (212, 214) of the bag section (200) with a movably mounted first suction jaw (22) on the first side (212) of the bag section (210) and a movably mounted second suction jaw (24) on the second side (214) of the bag section (200), wherein at least one of the suction jaws (22, 24) is arranged at an acute angle to the corresponding side (212, 214) of the bag section (200).