Round Baler Duck Bill Clamping Device
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing round balers face issues with wrapping material creeping back into the supply roll due to factors like wind, vibration, and adhesive properties, leading to feed jams and difficulties in rethreading, especially when using plastics sheets with adhesive coating.
Innovation Solution
A clamping device is integrated with the duck bill assembly to apply additional force when the duck bill is in the retracted position, ensuring the wrapping material is securely gripped between bale wrapping cycles, and a common command operates the clamping mechanism and cutting device to enhance the gripping force during the severing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the duck bill assembly is used to feed wrapping material into the chamber, then the wrapping material is introduced between transverse rollers, but the wrapping material creeps back into the supply roll due to wind, vibration, and adhesive properties
Solution Approach 1:
The clamping device applies preliminary clamping force to the wrapping material before and during the feeding process, creating a counteracting force that prevents the material from creeping back into the supply roll due to wind, vibration, and adhesive properties. This preliminary anti-action ensures stable material positioning throughout the wrapping cycle.
2Productivity
If the duck bill assembly grips the wrapping material to feed it into the chamber, then material uptake is achieved, but feed jams occur when material creeps back
Solution Approach 1:
The clamping device performs preliminary action by securing the wrapping material in the correct position before the feeding process begins. This preliminary positioning and clamping prevents material creepback during the wrapping cycle, thereby preventing feed jams and ensuring reliable material uptake for continuous productive operation.
3Adaptability or versatility
If the duck bill assembly is retracted between wrapping cycles, then the chamber is prepared for the next bale, but wrapping material may slip or creep during retraction
Solution Approach 1:
The clamping device operates periodically, applying clamping force during the retraction phase and releasing it during the feeding phase. This periodic clamping action ensures that the wrapping material remains controlled and prevents slipping or creeping during retraction, while still allowing smooth material uptake during the feeding cycle.
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 clamping device effectively prevents wrapping material from creeping back, reducing feed jams and simplifying the rethreading process, ensuring consistent material uptake for subsequent bale wrapping cycles and maintaining operational efficiency.
Implementation Method 1
a clamping device is provided to apply an additional force to the duck bill assembly while the duck bill is in the retracted position in order for the wrapping material to be gripped more firmly
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A round baler is disclosed having a bale forming chamber. A duck bill assembly (28), which comprises a pair of elongate plates (22) that are biased towards one another to grip the wrapping material (30) between them, is movable between an advanced position and a retracted position to introduce the free end (31) of a wrapping material (30) drawn from a supply roll (16) into the bale forming chamber of the baler. A cutting device is located between the retracted position of the duck bill assembly (28) and the bale forming position for severing the length of wrapping material (30) wrapped around the bale (10,110) in the bale forming chamber at the end of a bale wrapping cycle from the supply roll (16). In the invention, a clamping device is provided to apply an additional force to the duck bill assembly (28) while the duck bill assembly (28) is in the retracted position in order for the wrapping material (30) to be gripped more firmly by the duck bill assembly (28) between bale wrapping cycles.