Welding Consumable Container Score Line and Protective Lip
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Solution Overview
Problem
Welding consumable containers often form sharp burrs during lid removal, posing safety risks and potential contamination issues, especially in the food industry, as the existing rolled steel edges are insufficient in covering the exposed edges.
Innovation Solution
A container design featuring a score line on the inner surface of the end wall with a protective label or folded portion that tears inward to cover the burr, forming a protective lip to shield the user and contents from the sharp edge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a score line is cut partway through the container wall to form an easy-open lid, then the ease of operation is improved, but a sharp burr is formed at the edge that creates safety hazards and contamination risks
Solution Approach 1:
A protective element (such as a rolled edge, flange, or separate protective component) is introduced as an intermediary between the sharp burr and the user's hand or the container contents. This protective element covers the burr formed by the score line, preventing direct contact while maintaining the ease-open functionality of the lid.
Solution Approach 2:
The container wall edge is segmented into multiple functional zones: the score line region for easy opening, the burr formation zone, and a separate protective element zone. This segmentation allows each zone to perform its specific function independently - the score line enables easy opening while the protective element covers the resulting burr.
2Manufacturing precision
If the score line is placed on the outside of the container wall, then the interior surface remains uninterrupted for food safety, but the burr still extends inward and exposes the sharp edge to the container interior
Solution Approach 1:
A protective element extending into the container interior serves as an intermediary barrier that covers the burr. This protective element can be a rolled edge, flange, or separate component that reaches inward to shield the sharp edge from contacting the container contents, while the score line remains positioned on the exterior surface.
Solution Approach 2:
The protective element extends in a new dimension (radially inward into the container) to cover the burr, rather than simply positioning the score line in a different location. This dimensional extension creates a protective barrier that addresses the burr exposure problem without compromising the exterior score line placement.
3Object-affected harmful factors
If a rolled steel edge is applied about the opening to cover the burr, then the protection against injury is improved, but the score line becomes difficult to form beneath the rolled edge
Solution Approach 1:
The manufacturing process is segmented into distinct steps: first forming the score line on the exterior surface, then applying or forming the protective element (rolled edge, flange, or separate component) in a subsequent step. This segmentation allows each operation to be performed independently without interference, solving the manufacturing difficulty.
Solution Approach 2:
The score line is formed as a preliminary action before the protective element is applied or formed. By establishing the score line position and geometry first, subsequent protective elements can be precisely positioned to cover the resulting burr, making the overall manufacturing process more manageable.
Data Source
AI summary
A container having a wall, where the wall includes a score line that defines a removable lid, where the score line defines the perimeter of the lid. The container lid includes a protective component extending inwardly of the perimeter of the lid and covering a sharp edge of a burr formed by removing the lid from the wall.