Plastic Container Base with Tangential Ribs for Conveyor Noise Reduction
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Solution Overview
Problem
Existing plastic containers with bearing rims face challenges in minimizing noise generation when rolled on conveyors and in distributing forces evenly to prevent structural instability and breakage under load.
Innovation Solution
The design features a bearing rim with elevated ribs that lead tangentially into a plane, an inner rim, and an outer rim, which distribute forces uniformly and minimize contact area with conveyor rollers, enhancing load-bearing capacity and reducing noise by ensuring a smooth transition over rollers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the bearing face is elevated compared to the inner region, then noise generation during conveyor rolling is minimized, but the load-bearing capability and structural stability are reduced
Solution Approach 1:
The base is segmented into distinct functional zones: an elevated bearing rim region for noise-minimized conveyor contact, a lower inner region for load distribution, and intermediate ribs connecting these zones. This segmentation allows each region to optimize its specific function while maintaining overall structural integrity.
Solution Approach 2:
The bearing rim is elevated in the vertical dimension relative to the inner region, creating a height difference that enables the bearing face to contact conveyor rollers at a higher level. This dimensional change minimizes the contact area and noise generation while the ribs provide vertical force transmission paths to maintain load-bearing capability.
2Stability of the object's composition
If forces are concentrated on specific areas of the base, then the structural stability is improved, but the risk of breakage and force peaks increases
Solution Approach 1:
Different regions of the base are assigned different structural properties: the bearing rim is elevated and optimized for contact, the inner region is lower for load distribution, and the connecting ribs are specifically shaped with tangential end faces to distribute forces uniformly. This local differentiation allows force concentration where needed while preventing breakage through uniform stress distribution in critical transition zones.
Solution Approach 2:
The end faces of the ribs are designed with curved, tangential transitions into the bearing rim plane, avoiding sharp angles and stress concentration points. This curved geometry distributes forces more uniformly across the rib structures, preventing force peaks that could lead to breakage while maintaining structural stability.
3Strength
If the bearing face has large contact area with conveyor rollers, then the load distribution is improved, but noise generation increases
Solution Approach 1:
The contact function is segmented from the load-bearing function: the elevated bearing rim provides a dedicated contact surface for conveyor rollers with minimized area to reduce noise, while the lower inner region and rib structures handle load distribution. This functional segmentation allows optimization of each aspect independently.
Solution Approach 2:
By elevating the bearing rim to a higher vertical dimension, the patent creates a separate contact zone that is spatially distinct from the main load-bearing inner region. This dimensional separation allows the bearing face to have minimal contact area for noise reduction while the load distribution function is handled by the broader base structure at a different vertical level.
4Ease of manufacture
If the ribs are designed with abrupt transitions to the plane, then manufacturing is simplified, but force peaks and breakage risk increase
Solution Approach 1:
The ribs feature curved, tangential end faces that transition smoothly into the bearing rim plane rather than abrupt直角 transitions. This curved geometry eliminates stress concentration points and force peaks that would lead to breakage, while remaining compatible with standard injection molding processes used for plastic container manufacturing.
Solution Approach 2:
The rib geometry parameters are optimized to include specific curvature radii and tangential transition angles that balance manufacturing feasibility with mechanical performance. These parameter adjustments ensure smooth force flow while maintaining compatibility with conventional manufacturing methods.
Data Source
AI summary
The invention relates to a plastic container with a base and side walls standing on the base, wherein a receiving region of the container is defined by the base and the side walls, wherein the base, on its side facing away from the receiving region, forms a plane, wherein the plane carries an inner region, a bearing rim surrounding the inner region, and first ribs protruding from the plane, wherein the bearing rim has a bearing face for the container and the bearing face is elevated in the direction perpendicular to the plane compared to the inner region, wherein each of the first ribs extends in the direction of the bearing rim starting from the inner region, wherein, with respect to each of the first ribs, the end face of the first rib pointing in the direction of extent leads tangentially into the plane.