Scraping Roller With Detachable Angled Teeth
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Solution Overview
Problem
Existing scraping rollers for animal pelts, such as mink pelts, are often wasted due to dull teeth, requiring frequent replacement and generating significant waste, as they cannot be effectively sharpened or have their teeth replaced individually.
Innovation Solution
A scraping roller design with detachable scraping teeth and a unique inner structure featuring angled groove structures and shoulder portions, allowing for the replacement and sharpening of individual teeth, reducing material waste by allowing only dull teeth to be replaced rather than the entire roller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If scraping rollers are used with fixed teeth, then the structure is simple and easy to manufacture, but the entire roller must be discarded when teeth become dull, causing significant material waste
Solution Approach 1:
The scraping roller is divided into modular components: a reusable roller body and replaceable individual teeth. Each tooth can be independently removed and replaced when dull, while the roller body remains in service. This segmentation eliminates the need to discard the entire roller, significantly reducing material waste while adding moderate structural complexity through the development of interchangeable components.
2Productivity
If scraping rollers are sent away for sharpening, then the teeth can be restored, but the process takes days or weeks and reduces productivity
Solution Approach 1:
Teeth are pre-sharpened during manufacturing and then replaced as needed rather than sending the entire roller away for sharpening. The roller body remains in continuous use while only the dull teeth are swapped out, eliminating weeks of downtime. This preliminary preparation of replaceable teeth components maintains high productivity while minimizing time loss.
3Reliability
If multiple sets of scraping rollers are kept for replacement, then continuous operation is maintained, but the cost and storage requirements increase
Solution Approach 1:
Instead of storing multiple complete roller assemblies, only individual teeth components need to be inventoried for replacement. The roller body is a durable, long-lasting component that remains in service indefinitely. This segmentation reduces the quantity of material required from multiple complete rollers to just a supply of replaceable teeth, while maintaining continuous operation reliability.
4Ease of manufacture
If scraping teeth are mounted in straight recesses, then the mounting is simple, but the scraping properties are not optimal
Solution Approach 1:
The mounting grooves are designed with specific angular orientations and geometric configurations optimized for each tooth position on the roller. Rather than using uniform straight recesses, each groove is locally tailored to achieve optimal scraping angles and tooth engagement, improving scraping performance while maintaining manufacturing feasibility through standardized angular patterns.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3D
AI summary
A scraping roller (2) for scraping the skin side of an animal pelt such as a mink pelt is disclosed. The scraping roller (4) comprises a plurality of scraping teeth (44, 44') arranged longitudinally on the outer surface of the scraping roller (2). The scraping roller (2) comprises an inner structure (30) provided with a plurality of groove structures (4, 4', 6, 6') configured to receive detachably attached insert members (20, 20') formed as scraping teeth (44, 44') to the scraping roller (2). Each groove structure (4, 4', 6, 6') comprises a straight bore (6, 6') and each insert member (20, 20') comprises an engagement member (22, 22') configured to be detachably attached to the straight bore (6, 6'). There is further a non-zero angle (α) between the transversal axis (Y) of the first groove structures (4, 4') and the normal direction (R) (radius) of the inner structure (30).