Binding Device Deflection Edge Twine Tension
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Solution Overview
Problem
Existing binding devices in round balers often result in defective cut surfaces and premature wear of cutting blades due to low twine tension during the cutting process, leading to fraying and interruptions in the bale wrapping process.
Innovation Solution
A binding device with a deflection edge that increases twine tension by guiding the twine along an inclined plane to the cutting edge, delaying the cutting process and generating a tension peak for a clean, sliding cut, reducing wear and improving cut quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the cutting blade engages the twine under low tension, then the cutting process is simple, but the cut surface becomes defective and the blade wears prematurely
Solution Approach 1:
The deflection edge performs a preliminary action by guiding the twine and building up tension before the cutting edge engages. This pretensioning of the twine along the deflection edge ensures that when cutting occurs, the twine is under optimal tension for a clean cut, preventing defective surfaces and reducing blade wear.
Solution Approach 2:
The deflection edge changes the tension parameter of the twine dynamically. As the twine moves along the deflection edge, tension builds up progressively, transforming the low-tension state into a high-tension state right at the moment of cutting, thereby improving cut quality without complicating the overall process.
2Device complexity
If the twine is cut under low tension, then the cutting mechanism is simple, but the blade experiences increased wear and short service life
Solution Approach 1:
The deflection edge performs a preliminary action by guiding the twine and building up tension before the cutting edge engages. This pretensioning of the twine along the deflection edge ensures that when cutting occurs, the twine is under optimal tension for a clean cut, preventing defective surfaces and reducing blade wear.
Solution Approach 2:
The deflection edge changes the tension parameter of the twine dynamically. As the twine moves along the deflection edge, tension builds up progressively, transforming the low-tension state into a high-tension state right at the moment of cutting, thereby improving cut quality without complicating the overall process.
3Ease of operation
If the twine is cut without pretension, then the cutting process is straightforward, but the cut surface is poor causing fraying and process interruptions
Solution Approach 1:
The deflection edge performs a preliminary action by guiding the twine and building up tension before the cutting edge engages. This pretensioning of the twine along the deflection edge ensures that when cutting occurs, the twine is under optimal tension for a clean cut, preventing defective surfaces and reducing blade wear.
Solution Approach 2:
The deflection edge changes the tension parameter of the twine dynamically. As the twine moves along the deflection edge, tension builds up progressively, transforming the low-tension state into a high-tension state right at the moment of cutting, thereby improving cut quality without complicating the overall process.
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
The solution enhances the cutting effect by increasing twine tension, resulting in a clean cut surface and reduced wear on the cutting blade, minimizing fraying and optimizing the bale wrapping process efficiency.
Implementation Method 1
the binding twine is moved by the deflection edge with increasing tension in the binding twine along the deflection edge to the cutting edge
Implementation Method 2
the deflection edge can be beveled and form a kind of inclined plane or ramp over which the twine is guided
Data Source
Figure 1~1a
Figure 2~2a
Figure 3~3a
AI summary
The device has a cutting device including a cutting element retainer (28) designed at a cutting element guide (26) i.e. guide arm. A cutting element (35) i.e. cutting blade, is fastened at the retainer, and guided at and engaged with binding yarns (22, 24) for cutting the yarns from the guide. A deflection edge (38) is designed at the guide between the cutting element and the binding yarns. The deflection edge displaces the binding yarns into a deflection movement by setting a binding yarn tension before the binding yarns are engaged with a sharp cutting edge (36) of the cutting element.