Pelt Board Expansion Means for Dried Pelt Removal
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Solution Overview
Problem
Existing pelt boards face challenges in efficiently removing dried tubular pelts due to shrinkage during the drying process, which causes the pelt to exert squeezing forces, often requiring the pelt to be cut open for removal.
Innovation Solution
A pelt board design featuring broad elongated side surfaces and expansion means that can be selectively moved to reduce the outer cross-sectional circumference, allowing the pelt to be easily removed by shifting the forces to stationary parts, thereby reducing mechanical stress and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pelt board maintains a fixed cross-sectional circumference, then the structure is simple and stable, but the dried pelt cannot be easily removed due to shrinkage forces
Solution Approach 1:
The pelt board incorporates expansion means that can selectively change the cross-sectional circumference from an expanded position during drying to a reduced position for pelt removal. This dynamic adjustment allows the board to adapt its circumference, facilitating easy pelt removal while maintaining structural stability during the drying process.
2Adaptability or versatility
If the movable parts support the squeezing forces, then the pelt board can accommodate pelt shrinkage, but the mechanical components are exposed to wear and fatigue
Solution Approach 1:
The pelt board is divided into stationary parts (broad elongated side surfaces) and movable parts (expansion means). The segmentation allows the stationary parts to bear the majority of squeezing forces from pelt shrinkage, while the movable parts only support minor forces, thereby reducing wear and fatigue on mechanical components and improving overall reliability.
3Ease of operation
If the pelt board cross-sectional circumference is reduced for pelt removal, then the removal process is facilitated, but the structure undergoes mechanical stress and wear
Solution Approach 1:
The expansion means are designed to move between expanded and reduced positions, allowing the pelt board to dynamically adjust its cross-sectional circumference. This dynamic capability enables easy pelt removal while the stationary parts maintain structural integrity and bear the mechanical stress, preserving the overall strength and durability of the board.
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
A pelt board is disclosed for stretching and drying of tubular pelts, the pelt board having a tip end (13) from which the pelt is drawn onto the pelt board and a foot end (11), the pelt board comprising two broad elongated side surfaces (14, 15), wherein the pelt board comprises expansion means (3, 6) defining a narrow elongated side surface extending between side edges (4, 5, 7, 8) of the two broad elongated side surfaces (14, 15), and activation means (9) for selectively moving the expansion means (3, 6) to an expanded position and locking the expansion means (3, 6) in the expanded position, or unlocking the expansion means (3, 6) so that the expansion means (3, 6) are movable to a non-expanded position in which the outer cross-sectional circumference of the pelt board is reduced as compared to the expanded position.