Application Container Uniform Wall Thickness Sink Mark Prevention
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Solution Overview
Problem
Cosmetic material containers with thickness differences in cylindrical members often experience sink marks during injection molding, affecting appearance and dimensional stability.
Innovation Solution
An application container design with uniform wall thickness across the main body cylinder, utilizing integrated engagement portions and tools to prevent sink marks, and a feeding mechanism for stable material dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the relay tool has different thicknesses at the front portion and rear portion to accommodate different diameter components, then the structural function is improved, but sink marks appear on the surface during injection molding
Solution Approach 1:
The patent applies local quality by providing reinforcement ribs specifically at the thin-walled rear portion of the relay tool where sink marks are likely to occur, while maintaining the original thickness variation needed for functional accommodation of different diameter components. This localized reinforcement solves the surface quality issue without compromising the overall structural adaptability.
2Adaptability or versatility
If the relay tool has different thicknesses at the front portion and rear portion to accommodate different diameter components, then the structural function is improved, but dimensional stability deteriorates
Solution Approach 1:
The patent applies local quality by providing reinforcement ribs specifically at the thin-walled rear portion of the relay tool where dimensional instability and sink marks are likely to occur, while maintaining the original thickness variation needed for functional accommodation of different diameter components. This localized reinforcement solves the dimensional stability issue without compromising the overall structural adaptability.
3Manufacturing precision
If the cylindrical portion of the engagement portion is made thinner to separate from the inner surface of the main body cylinder, then uniform thickness is achieved, but the engagement structure becomes more complex
Solution Approach 1:
The engagement portion is segmented into a cylindrical portion and a connector, with the cylindrical portion being a separate thin-walled structure that engages with the application tool. This segmentation allows the cylindrical portion to have uniform thin thickness while the connector provides the necessary structural connection to the main body cylinder, thereby achieving thickness uniformity without excessive overall complexity.
Data Source
AI summary
An application container includes a main body cylinder, an application tool, and an engagement portion. The main body cylinder has a first end and a second end opposite the first end. The application tool is insertable into the main body cylinder through the first end of the main body cylinder. The engagement portion is positioned within the main body cylinder, and includes a cylindrical portion to connect with the application tool and a connector that connects the cylindrical portion and the main body cylinder. The cylindrical portion of the engagement portion is spaced apart from the main body cylinder.