Cosmetic Container Bottom Rigidity via Double Injection
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Solution Overview
Problem
Conventional cosmetic containers manufactured by hollow molding schemes have a monotonous design, lack visual appeal, and suffer from a lack of rigidity, making the bottom surface prone to damage when dropped, which can lead to leakage and reduced user satisfaction.
Innovation Solution
A cosmetic container design where the bottom surface is formed firmly and integrally with the side surface using a double injection scheme, incorporating a reinforcing rib and a fixing sill to enhance rigidity, and allowing for decorative printing on the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If hollow molding scheme is used to manufacture cosmetic container, then manufacturing process is simple, but bottom surface lacks rigidity and is easily damaged when dropped
Solution Approach 1:
The bottom member is divided into a bottom surface and a side surface that are drawn inward by a predetermined interval, creating a stepped structure. This segmentation allows the bottom surface to be reinforced independently while maintaining manufacturing simplicity through the double injection molding process.
Solution Approach 2:
The double injection molding scheme uses two different resin materials with distinct flow directions to form the bottom member and side surface member. This composite structure provides enhanced rigidity to the bottom surface while maintaining ease of manufacture through integrated molding.
2Ease of manufacture
If bottom surface and side surface are formed integrally by hollow molding, then manufacturing is easier, but separate reinforcement of bottom surface is impossible
Solution Approach 1:
The bottom member is segmented into a bottom surface and a side surface that are drawn inward by a predetermined interval. This creates a stepped structure that allows independent reinforcement of the bottom surface through the double injection molding process while maintaining manufacturing efficiency.
Solution Approach 2:
The side surface member is drawn inward by a predetermined interval to create a stepped structure in the vertical dimension. This dimensional change provides a separate reinforcement region for the bottom surface without complicating the manufacturing process.
3Ease of manufacture
If conventional hollow molding is used, then container can be manufactured simply, but decorative aspects and visual appeal are limited
Solution Approach 1:
The double injection molding scheme uses two different resin materials with distinct flow directions to form complex three-dimensional shapes including curved surfaces and tapered surfaces. This composite approach enables decorative aspects and visual appeal while maintaining manufacturing simplicity through integrated molding.
Solution Approach 2:
The side surface member includes a curved outer surface and the overlapping member includes a tapered surface. These curved and tapered geometries provide visual appeal and decorative capability while being manufactured through the double injection molding process.
4Strength
If bottom member is drawn inward by predetermined interval, then bottom surface rigidity is improved, but structure becomes more complex
Solution Approach 1:
The bottom member is segmented into a bottom surface and a side surface that are drawn inward by a predetermined interval. This segmentation creates a stepped structure that reinforces the bottom surface while the double injection molding process integrates the formation of multiple members, reducing overall structural complexity.
Solution Approach 2:
The side surface member is drawn inward by a predetermined interval to create a stepped structure in the vertical dimension. This dimensional change provides bottom surface reinforcement without requiring additional separate components, thereby managing structural complexity.
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 enhanced rigidity of the bottom surface prevents damage from accidental drops, ensuring the cosmetic product remains inside, improving user satisfaction, and allowing for various decorative designs that enhance marketability.
Implementation Method 1
an overlapping member that overlaps the bottom member is formed by a double injection scheme to allow the side surface member to surround a bottom surface of the bottom member, so that the bottom member and the side surface member are integrally bonded
Data Source
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AI summary
The present invention provides a cosmetic container including: a side surface member that forms a closed curved surface shielded from an outside so as to form a reception space; a top surface member formed integrally with the side surface member on an upper portion of the side surface member, and including a cap coupling part protruding from a center region of the top surface member; and a bottom member disposed on a lower portion of the side surface member so as to be fixed to the side surface member, wherein the bottom member is drawn inward of the side surface member, and an overlapping member that overlaps the bottom member is formed by a double injection scheme to allow the side surface member to surround a bottom surface of the bottom member, so that the bottom member and the side surface member are integrally bonded.