Natural Polymer Hinge Structure for Rigid Handling and Repeat Bending
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Solution Overview
Problem
Existing hinging products made from natural polymers face challenges in manufacturing ease, handling post-molding, and maintaining structural integrity during manipulation and packaging, as they often require complex material composition adjustments and reinforcement methods.
Innovation Solution
A hinging product design featuring a flexible sheet element and a bridge portion made of natural polymers, where the bridge portion forms a rigid connection initially to facilitate easy handling and demolding, and subsequently breaks or tears to allow repetitive hinging, with the flexible sheet element maintaining connection between parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a hinge is formed by a flexible strip bridging a gap between separate product parts, then the product allows repetitive hinging, but the connection between parts is weak and may not maintain structural integrity during handling and packaging
Solution Approach 1:
The hinge construction is segmented into three distinct components: a flexible sheet element for repetitive hinging, a bridge portion made of natural polymer mass for structural integrity, and a connecting structure. This segmentation allows each component to fulfill its specific function - the flexible element provides movement capability while the bridge portion provides strength during handling and packaging.
Solution Approach 2:
The hinge construction combines different materials with complementary properties: a flexible sheet element (providing bendability and repetitive hinging capability) and a bridge portion made of natural polymer mass (providing structural strength). This composite structure resolves the contradiction by integrating materials that individually address different requirements - flexibility for operation and strength for structural integrity.
2Ease of operation
If the material composition is locally influenced to form a hinge in natural polymer products, then the hinge area provides easier bending, but the manufacturing process becomes complex requiring precise material composition control
Solution Approach 1:
Instead of creating a hinge through complex local material composition adjustments throughout the product, the invention segments the hinge function into a dedicated flexible sheet element and bridge portion structure. This simplifies manufacturing by using a standardized hinge construction that can be applied consistently rather than requiring precise local material control at different positions.
Solution Approach 2:
The flexible sheet element acts as an intermediary component that provides the bending function without requiring modification of the main product material composition. This mediator approach simplifies manufacturing by introducing a dedicated hinge component rather than complexly modifying the natural polymer mass throughout the product structure.
3Strength
If a paper strip is applied to reinforce the hinge area during molding, then the hinge area provides easier bending and reinforcement, but the manufacturing process requires additional steps and material application
Solution Approach 1:
The invention merges the reinforcement function and the hinge flexibility function into a single integrated flexible sheet element and bridge portion structure. This eliminates the need for separate paper strip application steps, as the flexible sheet element itself provides both the reinforcement and the bending capability in one component.
Solution Approach 2:
The flexible sheet element and bridge portion form a composite hinge structure that inherently provides both strength and bending ease without requiring additional reinforcement materials like paper strips. This integrated composite approach simplifies manufacturing by combining multiple functions into a single structural solution rather than requiring layered material application.
4Ease of operation
If the bridge portion forms a rigid connection initially, then the product is easy to handle during demolding and stacking, but the rigid connection must subsequently break or tear to allow hinging
Solution Approach 1:
The bridge portion is designed with dynamic characteristics - it provides rigid connection strength during initial handling and demolding operations, then is designed to break or tear at a predetermined location to transition into a flexible hinging connection. This dynamic behavior allows the same component to serve different functional requirements at different stages of product use.
Solution Approach 2:
The bridge portion is pre-designed with a predetermined break location and structural characteristics that enable it to provide initial rigid support for easy handling during demolding and stacking. The preliminary structural design ensures that the bridge portion will naturally break at the intended location after serving its initial support function, enabling subsequent hinging operations.
Data Source
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AI summary
Product made using a mass comprising natural polymers, wherein the product comprises at least a first and a second product part, connected by a hinge construction, wherein the hinge construction comprises at least one flexible sheet element and one bridge portion made of said mass comprising natural polymers, wherein the hinge construction is designed such that, prior to a first time hinging, the at least one bridge portion forms a more rigid connection between the first and second product part than the flexible sheet element and by hinging said bridge portion is severed, such that the first and second part are substantially only connected by the or each flexible strip.