Paint Container Lid Segmentation for Punching and Sealing
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Solution Overview
Problem
Metal paint containers are expensive to produce and plastic ones are not rigid enough to withstand the forces of a punching type colorant dispenser, making them unsuitable for automatic colorant dispensing systems.
Innovation Solution
A paint container design featuring a metal lid portion for punching and a plastic peripheral lid portion that seals to a plastic receptacle, allowing the container to be used in a punching type colorant dispenser while reducing material costs by minimizing the metal content in the lid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the entire lid is made of metal to withstand punching forces, then the container can be used in a punching type colorant dispenser, but the production cost increases
Solution Approach 1:
The lid is divided into two distinct portions: a metal lid portion (central) and a plastic lid portion (peripheral). The metal portion provides the necessary strength for punching operations, while the plastic portion reduces overall material cost. This segmentation allows each material to be used only where its specific properties are needed.
Solution Approach 2:
Different materials are applied to different regions of the lid based on local functional requirements. The central metal portion is designed for punching strength, while the peripheral plastic portion is designed for sealing and cost reduction. This local differentiation optimizes both performance and cost.
2Strength
If the entire lid is made of metal to ensure rigidity, then the container can withstand punching forces, but the weight increases
Solution Approach 1:
The lid is segmented into metal and plastic portions, allowing the heavier metal material to be used only where structural strength is critical (central punching area), while the lighter plastic material is used in the peripheral sealing area, thereby reducing overall weight.
Solution Approach 2:
Material selection is optimized locally: dense metal provides rigidity where needed for punching resistance, while lighter plastic provides sufficient properties for sealing and peripheral support, achieving weight reduction without sacrificing necessary strength.
3Ease of manufacture
If a larger plastic portion is used in the lid to reduce cost, then production cost decreases, but the ability to withstand punching forces is reduced
Solution Approach 1:
The lid structure is segmented into a metal central portion specifically sized and positioned to bear the punching load, while the plastic peripheral portion is extended to maximize cost savings. The segmentation ensures the metal is concentrated where punching forces are applied.
Solution Approach 2:
The metal material is strategically placed in the central region where punching forces concentrate, providing localized strength enhancement. The plastic material is used in the peripheral region where punching forces are minimal, achieving cost reduction while maintaining punching resistance.
4Loss of substance
If the lid is made thinner to reduce material usage, then the amount of material required decreases, but the ability to withstand punching forces is reduced
Solution Approach 1:
The metal lid portion is designed with optimized thickness and geometry in the central punching area to provide maximum strength with minimum material. The material distribution is non-uniform, concentrating metal where punching resistance is critical and using thinner or plastic material elsewhere.
Data Source
Figure 1~2a
Figure 2b
Figure 3a~3c
AI summary
A paint container (1 ) comprising a receptacle (2) and a lid (4), wherein the lid (4) comprises a metal lid portion (22) and a plastic lid portion (20).The metal lid portion (22) being a central portion allowing the paint container (1 ) to be used in a punching type colorant dispenser punching the metal lid portion (22) prior to dispensing colorant into the paint. The plastic lid portion (20) being a peripheral portion encircling the metal lid portion (22). The plastic lid portion (20) comprises a lid sealing portion (46) sealing the lid (4) to a circumferential plastic receptacle sealing portion (30) of the receptacle (2).