Compressed Bale Cross Strapping for Fiber Stability
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Solution Overview
Problem
Compressed bales made of highly compressed textile fibers often expand after packaging, leading to instability and poor stacking capabilities, which increases storage and handling costs, and existing packaging methods may not adequately secure sensitive fiber materials.
Innovation Solution
The use of cross strapping with additional strapping bands that are applied over the circumferential sides of the bale, in combination with multipart film packaging that can be applied before or after strapping, to stabilize the bale and enhance packaging tightness, allowing for better stacking and protection of the fiber material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single strapping with parallel endless bands is applied to the compressed bale, then the packaging is simple and quick to apply, but the bale becomes unstable and expands after packaging, leading to poor stacking capabilities
Solution Approach 1:
The strapping system is segmented into two independent components: a first strapping with parallel endless bands applied in the pressing direction, and a second cross strapping with bands applied perpendicular to the pressing direction. This segmentation allows each strapping component to perform its specific function - the first strapping provides initial containment while the second cross strapping prevents expansion and maintains stability during stacking and storage.
Solution Approach 2:
The packaging solution transitions from a single-dimensional strapping approach (bands parallel to pressing direction) to a two-dimensional cross strapping system. The second strapping applies bands in the perpendicular dimension (cross direction), creating a grid-like structure that effectively constrains the bale in both pressing and transverse directions, preventing expansion and improving stacking stability.
2Productivity
If the strapping bands are laid over the pressing sides of the compressed bale, then the strapping can be applied quickly, but the bands dig deeply into the expanded bale body and form constrictions
Solution Approach 1:
The first strapping with parallel endless bands is applied to the compressed bale while it is still in its compressed state, before significant expansion occurs. This preliminary action secures the bale structure and prevents excessive expansion that would otherwise cause the bands to dig in deeply and form damaging constrictions.
Solution Approach 2:
The multipart film packaging is applied beforehand to cushion and protect the bale body. This film layer acts as a buffer between the strapping bands and the fiber material, preventing the bands from digging deeply into the expanded bale body and reducing the formation of constrictions that could damage sensitive fiber materials.
3Ease of manufacture
If traditional packaging methods are used without cross strapping, then the packaging process is simpler, but the bale expansion leads to instability and increased storage and handling costs
Solution Approach 1:
The strapping system is segmented into two independent components: a first strapping with parallel endless bands applied in the pressing direction, and a second cross strapping with bands applied perpendicular to the pressing direction. This segmentation allows each strapping component to perform its specific function - the first strapping provides initial containment while the second cross strapping prevents expansion and maintains stability during stacking and storage.
Data Source
AI summary
A packaging of compressed bales (1) includes packaging (11) surrounding the compressed bale. The compressed bale is formed from highly compressed, preferably short-cut, textile fibers and has mutually opposite pressing sides (5, 6), which are acted upon by a pressing device (32) in a pressing direction (10), and circumferential sides (7, 8), which are arranged between the pressing sides. The packaging has multipart film packaging (12) resting on the bale body (4) and first strapping (22) with a plurality of parallel endless bands (23) that are laid over the pressing sides of the compressed bale. An additional strapping (25) having a plurality of endless strapping bands (26, 27) are applied to the compressed bale. The strapping bands are laid peripherally only over the circumferential sides and are arranged externally on the film packaging and on the bands. The strapping bands cross the bands, forming cross strapping (21).