Rigid Removable Linings for Reusable Paint Containers
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Solution Overview
Problem
Existing containers for paints, varnishes, and ready-mixed plasters are difficult to clean and reuse due to the inability to effectively separate the contents from the container, leading to disposal as waste, and existing linings are cumbersome and prone to contamination during use.
Innovation Solution
A dimensionally stable inner container with a second shell and sealing element, allowing easy insertion and removal, and a sealing mechanism to prevent contamination and enable reuse of the outer container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a plastic film lining is used in the container, then the container can be reused or recycled, but the film insertion is time-consuming and requires manual crease-free placement
Solution Approach 1:
The container is divided into an outer container and an inner container (lining) that can be separately manufactured and assembled. The inner container is pre-formed as a complete unit with integrated sealing elements, eliminating the need for manual film insertion and creasing during assembly.
Solution Approach 2:
The inner container is pre-manufactured with integrated sealing elements and a complete structural form before insertion into the outer container. This preliminary preparation allows for quick, tool-free assembly by simply placing the pre-formed inner container into the outer container without manual manipulation of flexible film.
2Adaptability or versatility
If a plastic film lining is used in the container, then the container can be reused, but the film may tear or wrap around stirrer during mechanical stirring
Solution Approach 1:
The container system separates the structural support function (outer container) from the lining function (inner container). The inner container is designed as a dimensionally stable, rigid structure that resists deformation during mechanical stirring, preventing the tearing and wrapping issues associated with flexible plastic films.
Solution Approach 2:
The lining material properties are changed from flexible plastic film to a dimensionally stable, rigid material with sufficient wall thickness. This parameter change in structural rigidity and dimensional stability enables the lining to withstand mechanical stirring forces without deforming or tearing.
3Adaptability or versatility
If a plastic film lining is used in the container, then the container can be reused, but cleaning the container with the inner sack is not possible
Solution Approach 1:
The container is segmented into a removable inner container and an outer container. The inner container can be completely removed from the outer container, allowing the outer container to be accessed and cleaned thoroughly with tools such as trowels, eliminating the barrier that a permanent plastic film lining would create.
Solution Approach 2:
The inner container is extracted as a separate, removable component from the outer container. This extraction capability allows the outer container to be completely cleaned and inspected, while the inner container can be separately disposed of or cleaned, solving the cleanability issue inherent in permanent plastic film linings.
4Productivity
If the lining is made dimensionally stable with sufficient wall thickness, then the inner container can be easily inserted and automated, but the material usage increases
Solution Approach 1:
The wall thickness and material properties of the inner container are optimized to achieve dimensional stability with minimal material usage. The inner container has sufficient rigidity for automated handling and insertion while maintaining thin walls to reduce material consumption and cost.
Solution Approach 2:
The inner container is designed with dimensionally stable properties only where necessary for structural integrity and automated handling (overall rigidity), while maintaining minimal wall thickness in areas where high strength is not critical, optimizing the balance between automation capability and material usage.
Data Source
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AI summary
The invention relates to a container (11) for holding paints, varnishes, plastic dispersions, ready-mixed plasters or other substances requiring disposal, or foodstuffs. The container has an outer container (13) with a first base and a first shell (17) adjoining the first base, the first shell (17) having an opening (21) at its upper end (19), a lid (23) for closing and sealing the opening (21), and a lining (27) covering the inner surface of the outer container (13) and, together with the remaining contents, can be removed from the outer container (13) and disposed of. The lining is a dimensionally stable inner container (27) with a second shell (31) and a second base.