Dispenser Membrane with Intersecting Slits for Dosing
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Solution Overview
Problem
Existing dispensers for liquid edible products and household goods fail to provide a safe, flexible, and tamper-evident solution that prevents accidental opening and ensures optimal dosing and storage integrity, particularly for children and products in containers with flexible walls.
Innovation Solution
A dispenser with a membrane made of thermoplastic elastomer or liquid silicone rubber, integrated through multi-component injection molding, featuring a pouring nozzle with an elastic partition and a body made of polyethylene or polypropylene, designed for permanent connection with plastic containers, ensuring safety and optimal dosing while maintaining tightness and preventing excessive rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rigid dispenser structure is used, then manufacturing precision and structural stability are improved, but resistance to breaking or biting by children deteriorates
Solution Approach 1:
The dispenser is constructed using composite materials: a rigid thermoplastic body (polyethylene or polypropylene) combined with a soft thermoplastic elastomer or liquid silicone rubber membrane and upper region. This composite structure provides both structural stability for manufacturing precision and softness for safety against breaking or biting by children.
Solution Approach 2:
Different regions of the dispenser have different material properties: the upper region and membrane are made of soft thermoplastic elastomer or liquid silicone rubber for safety, while the lower body maintains rigid thermoplastic for structural stability. This local differentiation of material quality resolves the contradiction between rigidity and safety.
2Measurement precision
If a membrane with intersecting slits is used, then dosing precision is improved, but device complexity increases
Solution Approach 1:
The membrane with intersecting slits is integrally joined with the dispenser body through multi-component injection molding, merging the membrane structure with the main body into a single integrated component. This reduces assembly complexity while maintaining the dosing precision provided by the intersecting slit pattern.
Solution Approach 2:
The elastic membrane with intersecting slits automatically controls product flow based on pressure differential and elastic deformation, providing self-regulating dosing without additional mechanical components. The membrane's elasticity enables it to open and close the slits automatically in response to filling and dispensing conditions.
3Object-affected harmful factors
If a soft thermoplastic elastomer or liquid silicone rubber is used for the pouring nozzle, then safety against breaking or biting is improved, but manufacturing precision deteriorates
Solution Approach 1:
The dispenser uses composite materials where the soft thermoplastic elastomer or liquid silicone rubber is combined with rigid thermoplastic through multi-component injection molding. This process maintains manufacturing precision by controlling the bonding interface and dimensional relationships between the soft upper region and rigid lower body, while providing safety through the soft material properties.
Solution Approach 2:
The rigid thermoplastic lower body acts as an intermediary that provides dimensional stability and manufacturing precision, while the soft thermoplastic elastomer or liquid silicone rubber upper region provides safety. The multi-component injection molding process creates a reliable bond between these two materials, allowing each to fulfill its primary function without compromising the other.
4Reliability
If a multi-component injection-molding process is used, then integration and sealing are improved, but manufacturing complexity increases
Solution Approach 1:
The multi-component injection molding process merges the thermoplastic body and thermoplastic elastomer or liquid silicone rubber membrane into a single integrated component with built-in sealing. This eliminates separate assembly steps and potential leakage points at interfaces, providing reliable sealing integrity while the process itself manages the manufacturing complexity through automated multi-material deposition.
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 dispenser provides a soft, flexible, and resistant pouring system that prevents breaking or biting, ensures proper dosing, maintains tightness during falls, and extends the storage life of liquid products by preventing accidental openings and damage.
Implementation Method 1
an elastic partition forming a membrane with a pair of intersecting slits extending radially outwards, wherein the membrane is made of a thermoplastic elastomer or liquid silicone rubber
Implementation Method 2
The pouring nozzle has an upper region made of thermoplastic elastomer or liquid silicone rubber, forming a monolith with the rest of the body of the dispenser
Data Source
AI summary
The dispenser with a membrane for sachets is characterised by the fact that the pouring nozzle has an upper region made of a thermoplastic elastomer, forming a monolith with the rest of the body of the dispenser, and the said pouring nozzle is equipped in the upper region with an elastic partition forming a membrane with a pair of intersecting slits.