Integrally Molded Flip-Top Preform for Blow Molding
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Solution Overview
Problem
The existing blow molding process for plastic containers, particularly those with flip-top closures, requires multiple manufacturing steps and excessive plastic material, which is inefficient and not sustainable.
Innovation Solution
A preform is developed with a flip-top closure base portion integrally molded with the container portion, including a first hinge structure for connecting to a second hinge structure of the closure top, allowing for a single-step integration of the closure during the blow molding process, reducing plastic usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the flip-top closure is manufactured separately and added in subsequent operations, then the manufacturing process can be simplified in terms of tooling, but the number of manufacturing steps increases and the amount of plastic material required increases
Solution Approach 1:
The patent merges the closure base portion with the container portion by integrally molding both components into a single preform. This eliminates the need for separate manufacturing and assembly operations, reducing the number of manufacturing steps while maintaining tooling simplicity through a unified molding process
2Adaptability or versatility
If the flip-top closure is manufactured separately and added in subsequent operations, then the closure can be produced independently, but the amount of plastic material required increases
Solution Approach 1:
The patent combines the closure base portion and container portion into a single integrally molded preform, eliminating the need for separate closure production and the associated material waste from flash, sprues, and separate component manufacturing. This unified approach reduces total plastic material consumption while maintaining design flexibility
3Productivity
If the closure base portion is integrally molded with the container portion, then the number of manufacturing steps is reduced, but the preform design becomes more complex
Solution Approach 1:
The patent segments the preform into distinct functional portions (container portion and closure base portion) with a defined interface, allowing each segment to be optimized for its specific function while being manufactured as an integrated unit. This segmentation manages design complexity through modular functional zones
4Loss of substance
If the closure base portion is integrally molded with the container portion, then plastic material usage is reduced, but the molding process becomes more complex
Solution Approach 1:
The patent combines both portions into a single integral preform that is manufactured in one molding cycle, eliminating the material waste associated with separate component manufacturing (flash, sprues, runners) while using a standardized injection molding process that does not significantly increase manufacturing 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
This approach simplifies the manufacturing process by integrating the flip-top closure within the preform, reducing plastic material requirements and streamlining production while maintaining the functionality of the closure.
Implementation Method 1
The preform is heated and a pressurized gas, usually air, is used to expand the hot preform
Implementation Method 2
a pressurized gas, usually air, is used to expand the hot preform and press it against the interior of a mold cavity
Data Source
AI summary
A preform for blow molding a plastic container, and the resulting container, with a flip-top closure includes a container portion and a flip-top closure base portion integrally molded with the container portion. The flip-top closure base portion includes an integrally molded first hinge structure for connecting the flip-top closure base portion to a second hinge structure on a flip-top closure top to create the flip-top closure for the container.