Overmolded Plastic Valve for Leak-Safe Gravity Dispensing
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Solution Overview
Problem
Existing liquid container valves fail to efficiently prevent leakage during transport and storage while allowing gravity-driven flow when inverted, and they are often complex and costly to manufacture.
Innovation Solution
A normally closed overmolded valve made entirely of recyclable plastic, featuring a plastic substrate member with semi-helical springs that maintain the valve closed until an upward force opens it for gravity-driven flow, utilizing fewer components and simpler assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional valve assembly is used to prevent liquid leakage during transport and storage, then leakage prevention is achieved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple valve components (substrate member, valve member, springs, lips) into a single integrated overmolded valve assembly. The substrate member and valve member are overmolded together as one piece, eliminating the need for separate sealing elements and reducing assembly steps while maintaining reliable leakage prevention during transport and storage.
Solution Approach 2:
The overmolded valve assembly serves multiple functions: it prevents leakage during upright transport, allows gravity-driven flow when inverted, and integrates sealing, actuating, and spring mechanisms into a single multi-functional component that replaces traditional multi-part valve assemblies.
2Manufacturing precision
If a complex multi-component valve is used to control liquid flow, then flow control precision is improved, but ease of manufacture deteriorates
Solution Approach 1:
The valve member and substrate member are overmolded together in a single manufacturing process, creating a precision-integrated component. This overmolding process ensures precise dimensional control and flow characteristics while simplifying manufacturing by eliminating multiple assembly steps and reducing the number of parts that need to be manufactured separately.
3Reliability
If multiple components are used in the valve assembly, then functional reliability is improved, but assembly difficulty increases
Solution Approach 1:
The substrate member, valve member, and sealing elements are overmolded together as a single integrated assembly, eliminating the need for separate assembly of multiple components. This reduces assembly difficulty while maintaining reliable valve function through the integrated design of the overmolded structure.
4Reliability
If non-recyclable materials are used for better performance, then functional performance is improved, but environmental sustainability deteriorates
Solution Approach 1:
The valve assembly is constructed entirely from recyclable plastic materials, with the substrate member and valve member both made from the same or compatible plastic materials that can be overmolded together. This homogeneous material composition maintains functional performance while enabling complete recyclability of the valve assembly.
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 during transport and storage, allows easy gravity-driven flow when inverted, and is more cost-effective and sustainable due to its recyclable plastic composition and reduced component count.
Implementation Method 1
A pair of semi-helical plastic springs, having upper and lower ends, extend upwardly from the lower ring member in an opposite manner
Implementation Method 2
opens to permit liquid to flow, by gravity, downwardly therethrough
Data Source
AI summary
An overmolded valve is provided for use in a container having a throat. The valve is inserted into the throat of the container and prevents liquid from flowing from the container during shipment or storage. When the container is inverted for use with a dosing and/or dispensing apparatus, the valve remains closed until it is opened by an upward force to permit liquid to flow from the container, by gravity, to the dosing and/or dispensing apparatus. The valve closes when the upward force is removed. A pair of plastic semi-helical springs urge the valve to the closed position.