Bale Wrapper Arm Positioning for Film Centring
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Solution Overview
Problem
Existing bale wrappers are optimized for a specific bale diameter, leading to inefficiencies in film usage and potential film slippage when the film roll is not centered, as they lack adjustable mechanisms to accommodate varying bale diameters.
Innovation Solution
Incorporation of sensors to determine bale diameter and adjustable wrapping arm positions, ensuring optimal film wrapping by centering the film roll on the bale's horizontal axis, with telescoping capabilities for precise adjustments, and automatic control for efficient film usage across different bale sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the film roll is not centred on the horizontal rotary axis of the bale, then the wrapping process can proceed, but excessive pretension of the film occurs which leads to film slipping off the bale
Solution Approach 1:
The system automatically centres the film roll on the bale's horizontal rotary axis through sensor detection and automated adjustment mechanisms, eliminating the need for manual centring operations while preventing film slippage caused by excessive pretension
Solution Approach 2:
Manual mechanical centring operations are replaced with automated sensor-based positioning systems that detect bale dimensions and automatically adjust the film roll position to maintain optimal wrapping tension without slippage
2Loss of substance
If the film roll position and wrapping speed are optimised for a particular bale diameter, then film-saving wrapping is achieved for that diameter, but the wrapping process becomes inefficient for bales of different diameters
Solution Approach 1:
The wrapping system dynamically adjusts film roll position and wrapping speed parameters based on detected bale diameter, allowing optimal film-saving wrapping for each specific bale size while maintaining efficiency across varying diameters
Solution Approach 2:
The system changes wrapping parameters (film roll position, wrapping speed, tension) according to the detected bale diameter, enabling film-optimized wrapping for each bale size while maintaining versatility across different diameters
3Device complexity
If the wrapping arm position is fixed, then the machine structure remains simple, but the wrapping process cannot be optimised for various bale diameters
Solution Approach 1:
The wrapping arm position is made dynamically adjustable through telescoping mechanisms and automated positioning systems, allowing precise optimization of wrapping parameters for various bale diameters while maintaining reasonable structural complexity
Solution Approach 2:
Sensor-based feedback systems detect bale dimensions and automatically adjust wrapping arm position to optimize the wrapping process for each bale size, achieving manufacturing precision without requiring overly complex manual adjustment mechanisms
Data Source
Figure 1
AI summary
A bale wrapper (14) for wrapping pressed bales (5, 5') that are made of hay, straw, silage or similar stalk-type products, comprising a wrapping table (20) on which a bale (5, 5') is rotatable on a horizontal rotary axis (D1, D2), and comprising an extension arm (15) that carries at least one wrapping arm (18) which by means of a drive motor (16) is rotatable on a vertical rotary axis (23), with the ends of said wrapping arm (18) comprising at least one film dispensing device (19) for accommodating at least one film roll (24), wherein setting of the vertical and/or horizontal position of the wrapping arm (18), of which there is at least one, takes place depending on the bale diameter of the bale (5, 5') that is present on the wrapping table (20) for the purpose of being wrapped.