Cosmetic Preform With Thin Bridge Seal
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Solution Overview
Problem
Existing cosmetic units with tubular bags or trays fail to provide a user-friendly application experience similar to rigid bottles while being cost-effective and efficient to produce, as they often lead to leakage or require complex handling to keep the applicator clean.
Innovation Solution
A preform is used to create a bottle-like cosmetic unit with a dimensionally stable container and integrated applicator stem, where the stem is connected to the container via a thin section that seals the opening but can be separated without tools, allowing for easy filling and sealing without additional materials or complex assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a tubular bag is used as the cosmetic container, then production costs are reduced and flexibility is increased, but the container becomes difficult to grip and prone to collapse during use
Solution Approach 1:
The patent uses a thin-walled injection-molded container that combines flexibility with structural stability. The container wall thickness is optimized to be thin for cost-effectiveness but sufficient to maintain grip stability and prevent collapse during use, resolving the contradiction between ease of manufacture and ease of operation.
2Ease of operation
If a rigid bottle is used as the cosmetic container, then grip stability and structural integrity are improved, but production costs increase and manufacturing complexity increases
Solution Approach 1:
The patent changes the parameter of wall thickness to optimize the balance between structural integrity and manufacturing cost. The thin-walled design provides sufficient grip stability while reducing material consumption and production costs compared to traditional rigid bottles.
3Productivity
If the container is opened for filling, then filling efficiency is improved, but contamination risk increases
Solution Approach 1:
The container is designed with a pre-formed opening structure that allows for efficient filling while maintaining contamination protection. The opening geometry is optimized to facilitate filling operations and the container can be sealed immediately after filling, minimizing exposure time and contamination risk.
4Loss of substance
If the container wall is made thin for cost reduction, then material consumption is reduced, but welding reliability deteriorates
Solution Approach 1:
The patent optimizes the wall thickness parameter to a specific range that enables reliable welding while minimizing material consumption. The thin-walled design includes features such as optimized joint geometry and welding process parameters to ensure sealing reliability despite reduced wall thickness.
Data Source
AI summary
A preform for a cosmetic unit filled with cosmetic mass has a container part which preferably forms a tube. The tube is open on the underside and is dimensioned in such a way that, after filling with the cosmetic mass to be stored by it, it can be closed by welding without being affected by the cosmetic mass and then forms to form the complete cosmetic container. The container part providing provides a subsequent removal opening on the upper side, and an applicator part, which consists at least of includes a stem fitted or capable of being fitted with an applicator element. The stem of the preform being is arranged partly inside the container part and partly projecting outwards through the subsequent removal opening. The stem is connected via a thin material bridge to the inner edge of the subsequent removal opening in such a way that it closes to close the latter tightly. The stem and the container part are an integral one-piece component.