Two-Part Blow Molded Bottle With Opaque Injection Molded Base
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Solution Overview
Problem
Existing plastic bottles lack the appearance and stability of glass while maintaining rigidity and strength, and they fail to create an illusion of containing more content than they actually do, due to their single-piece construction limitations and instability when placed horizontally.
Innovation Solution
A combination container with a blow molded, partially visible upper portion that is tightly press-fit into an injection molded, opaque lower portion, providing a double-walled structure that resembles glass, while allowing the upper portion to appear as if it contains more content than it actually does, without using adhesives that could react with the contents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-piece plastic bottle construction is used, then manufacturing simplicity is maintained, but the appearance quality and perceived value deteriorate compared to glass
Solution Approach 1:
The bottle is divided into two separate components: an upper blow-molded section and a lower injection-molded section. Each section is manufactured using the most appropriate process for its functional requirements, then assembled together. This segmentation allows the upper section to have the glass-like appearance of blow-molded plastic while the lower section provides the structural strength of injection-molded plastic.
Solution Approach 2:
The patent combines two different manufacturing processes (blow molding and injection molding) into a single integrated product. The two separately manufactured sections are joined through ultrasonic welding or adhesive bonding to create a unified bottle structure that exhibits both aesthetic and structural properties.
2Shape
If a transparent blow molded bottle is used, then visual appeal and content visibility are improved, but structural stability and rigidity deteriorate when placed horizontally
Solution Approach 1:
The bottle structure is segmented into an upper transparent section for visual appeal and a lower opaque section for structural stability. The transparent blow-molded upper section provides the desired aesthetic qualities, while the opaque injection-molded lower section serves as a stable base that prevents rolling and maintains horizontal positioning.
Solution Approach 2:
Different sections of the bottle are assigned different optical properties (transparent vs. opaque) and structural characteristics based on their functional requirements. The upper portion is transparent and visually appealing, while the lower portion is opaque and structurally reinforced to provide stability when the bottle is placed horizontally.
3Quantity of substance
If the bottle volume is increased to accommodate more content, then content capacity is improved, but the illusion of greater volume than actual content deteriorates
Solution Approach 1:
The lower section of the bottle is made opaque, which creates a visual effect where the contents appear to extend into the lower section even though they may not actually reach that far. This optical illusion enhances the perceived volume of contents without actually increasing the container capacity, addressing the contradiction between capacity and volume perception.
Data Source
AI summary
A combination two primary section apparatus including a blow molded bottle first top section press fit partially retained within an interior chamber of an injection molded container second bottom section. The resulting present invention two-piece molded container has the aesthetically pleasing benefits of a container made of plastic but appearing to be made of glass. An upper top surface of the blow molded bottle first top section is visible while a bottom portion concealed by the injection molded container second bottom section is not visible.