Container Lid with Collar Projection for Resealable Sealing
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Solution Overview
Problem
Existing containers for food products face challenges in cost-efficient manufacturing, as they require complex and costly injection molding tools, and their lids often fail to reseal properly after initial opening, leading to soiling and increased production costs due to separate labels and foil tears.
Innovation Solution
A container design featuring a one-piece flat lid element with a circumferential collar projection for secure fastening, allowing for single-step production of the collar and lid, which also serves as an information carrier, and a snap-in connection for reliable sealing and easy opening/closing, reducing manufacturing steps and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If separate labels are used on the container, then product information can be provided to consumers, but production costs increase significantly
Solution Approach 1:
The label is integrated directly into the container lid structure during the injection molding process. The lid element serves dual purposes: as the closure component and as the information carrier for product labeling. This merging eliminates the need for separate label application steps, reducing production costs while maintaining all necessary product information display capabilities.
2Ease of manufacture
If the lid is made of simple aluminum foil, then manufacturing is cost-efficient, but the lid tears uncontrollably during opening and cannot be reclosed
Solution Approach 1:
The lid element is constructed from composite materials combining a foil-like body for cost-efficiency with reinforced rim areas for structural integrity. The reinforced rims prevent uncontrolled tearing during opening while maintaining the overall thin, foil-like characteristics. This composite structure enables reliable reclosing after opening while keeping manufacturing costs low.
3Reliability
If foil is glued to the lid for closure, then sealing is improved, but the foil separates from the lid during opening without releasing the container connection
Solution Approach 1:
The closure foil is integrally formed as part of the lid element structure during injection molding, eliminating the separate gluing step. The foil and lid structure are combined into a single unified component with reinforced connections, ensuring that the foil remains attached to the lid throughout the opening process and that container opening occurs only when the entire lid connection is properly released.
4Adaptability or versatility
If the lid and collar are produced in separate steps, then manufacturing flexibility is maintained, but production time and costs increase
Solution Approach 1:
The lid element and collar element are produced as a single integrated component in one injection molding step. The mold design allows both elements to be formed simultaneously from the same material injection, eliminating separate production steps while maintaining the ability to adapt the design for different container types and products.
5Manufacturing precision
If complex injection molding tools are used, then manufacturing precision is improved, but tool costs and production complexity increase
Solution Approach 1:
The container structure is segmented into distinct functional elements (lower container part, lid element, collar element, rim) that can be molded using simpler, more cost-effective tools. The segmentation allows each component to be optimized for its specific function while using straightforward injection molding techniques, reducing overall tool complexity while maintaining high manufacturing precision for each component.
Data Source
AI summary
A container (10) for solid or pasty products, as well as for those that are flowable or can be removed by dipping, in particular food products, includes a lower container part (11) for receiving the product, as well as an upper container part (12) embodied as a container lid, wherein the lower container part (11) has a continuous rim (15) extending around its container opening (12), wherein the upper container part (12) consists of a collar element (16), which extends around the container opening (14) and encloses it in a collar-like manner, and of a substantially flat lid element (17). The lid element (17) is fastened on the collar element (16) and is releasably fastened on the rim (15) of the lower container part (11). The collar element (16) has a circumferential wall (161), oriented with its free end toward the lid element (17), on which the lid element (17) is fastened.