Double Injection Refill Holder Elastic Packing Seal
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Solution Overview
Problem
Existing cosmetic containers face issues with leakage, reduced space for cosmetics due to material thickness, and increased manufacturing time and cost due to separate sealing components, as well as volatility of cosmetic materials leading to evaporation and degradation.
Innovation Solution
A refill container using double injection molding with an elastic packing part integrated into the holder, preventing leakage and sealing without additional components, allowing for a metal or synthetic resin construction with an impregnation member and a hinge-coupled lid, enhancing productivity and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing ring is coupled to the upper portion of the refill container to prevent leakage, then sealing performance is improved, but device complexity and manufacturing cost increase due to additional components
Solution Approach 1:
The packing part is integrated directly into the refill container holder through double injection molding, merging two previously separate components (container holder and sealing element) into a single integrated structure. This eliminates the need for separate sealing rings and reduces assembly steps while maintaining effective sealing between the refill container and holder
Solution Approach 2:
The packing part is formed using double injection molding with different materials - the first resin material forms the refill container holder structure while the second resin material forms the elastic packing part. This composite construction allows the sealing element to be inherently integrated into the holder while maintaining the mechanical properties needed for effective sealing
2Reliability
If the inner container is formed of synthetic resin material to ensure sealing, then sealing performance is improved, but the space for containing cosmetics is reduced due to required thickness
Solution Approach 1:
The sealing function is transferred from the refill container wall to the integrated packing part in the holder. This allows the refill container to be formed with thinner walls using metal or synthetic resin material, maximizing internal volume for cosmetics while the separate packing part provides the necessary sealing barrier at the coupling interface
Solution Approach 2:
The double injection molding process creates a composite structure where the holder body and sealing element are formed from different resin materials with optimized properties. The first resin provides structural integrity while the second resin provides elastic sealing properties, allowing thin-walled containers to achieve effective sealing through the integrated packing part rather than requiring thick container walls
3Reliability
If separate sealing components are used to prevent leakage, then sealing performance is improved, but manufacturing time and cost increase
Solution Approach 1:
The packing part is integrated directly into the refill container holder through double injection molding, merging two previously separate components (container holder and sealing element) into a single integrated structure. This eliminates the need for separate sealing rings and reduces assembly steps while maintaining effective sealing between the refill container and holder
Solution Approach 2:
The packing part is pre-formed as an integral part of the refill container holder through double injection molding during the manufacturing process itself. This preliminary integration eliminates the need for subsequent separate assembly operations, reducing manufacturing time and improving productivity while ensuring consistent sealing performance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents leakage, maximizes cosmetic space, and simplifies assembly by integrating the packing part through double injection molding, improving sealing strength and reducing costs while minimizing material volatility.
Implementation Method 1
a packing part (30) of an elastic material is formed to an inside of the refill container holder (20) through double-injection molding or insert molding on a portion where an upper end of the refill container (10) is coupled
Data Source
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AI summary
The present invention relates to a refill container using double injection and, more specifically, to a refill container using double injection, comprising: a refill container for containing a cosmetic material, wherein the refill container is formed of a synthetic resin or a metallic material and has an impregnation member in which the cosmetic material is impregnated; a refill container holder which is coupled to the top of the refill container; and a refill container cover which is opened and closed by being hinge-coupled to the refill container holder, wherein the refill container holder is formed by doubly injecting or insert-injecting a packing part of an elastic material therein, the top of the refill container and the packing part are coupled when the refill container and the refill container holder are coupled, thereby preventing the leaking of the cosmetic material in the refill container, and, as the packing part of the elastic material is doubly injected or insert-injected to the refill container holder, the refill container can be sealed without any separate component, and the assembly process can be simplified, thereby enhancing productivity and reducing production costs.