Tapered Foam Dispenser Nozzle for Bubble Uniformity and Anti-Clogging
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Solution Overview
Problem
Existing dispensers face challenges in forming a foamed body with evenly dispersed bubbles due to nozzle clogging and uneven bubble expansion, which occurs when transporting a mixture of gas and paste material at high or low pressures.
Innovation Solution
A dispenser with a nozzle part featuring a tapered section and a movable needle part that adjusts the flow path diameter, combined with a stopper mechanism to control pressure and prevent clogging, ensures even bubble dispersion and stable foam expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pressure of the mixture is increased to transport the material, then the material can be transported effectively, but the hardening agent may be crushed and cause clogging, and temperature increase due to friction may start unwanted reactions
Solution Approach 1:
The flow path is divided into multiple sections with different diameter characteristics. The first section has a larger diameter to reduce friction and prevent premature hardening, while the second section has a smaller diameter to control discharge. This segmentation allows effective material transport without excessive pressure that would crush hardening agents.
Solution Approach 2:
Different sections of the flow path are given different local qualities - the first section has a larger diameter for gentle transport, while the second section has a smaller diameter for controlled discharge. This local differentiation optimizes both transport efficiency and material stability in different regions of the same component.
2Reliability
If the pressure of the material is decreased to avoid clogging, then the hardening agent remains intact, but the gas bubbles become larger and break during transport, causing uneven foam expansion
Solution Approach 1:
The flow path is segmented into two sections: the first section maintains larger diameter and lower pressure to preserve bubble integrity during transport, while the second section provides controlled discharge. This segmentation allows bubbles to remain intact during transport and only discharge properly at the end.
Solution Approach 2:
The flow path is designed to preliminarily maintain favorable conditions (larger diameter, lower pressure) during the transport phase to preserve bubble integrity, then transitions to discharge conditions at the appropriate moment. This preliminary action ensures bubbles remain intact until discharge.
3Device complexity
If a straight flow path is used in the nozzle, then the structure is simple, but the mixture pressure cannot be properly controlled and bubbles break during transport
Solution Approach 1:
Instead of a simple straight flow path, the nozzle uses a segmented structure with two distinct sections of different diameters. This segmentation provides the necessary pressure control and bubble protection without requiring complex external systems.
4Ease of operation
If the needle part movable range is not limited, then the flow path can be fully opened and closed, but the needle may damage the tapered section and consistent pressure control cannot be maintained
Solution Approach 1:
The stopper part is positioned in advance to define the maximum movement range of the needle part. This preliminary positioning prevents the needle from traveling too far and damaging the tapered section, while still allowing sufficient movement for flow control.
Solution Approach 2:
The stopper part acts as a protective element that cushions against excessive needle movement before damage can occur. It provides a mechanical limit that protects the tapered section from needle impact while maintaining operational functionality.
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 allows for the formation of a foamed body with evenly dispersed bubbles and a controlled foam expansion ratio, preventing nozzle clogging and maintaining consistent pressure throughout the discharge process.
Implementation Method 1
a tapered section in which an inside diameter of the flow path of the nozzle part decreases toward the tip end opening
Data Source
AI summary
A dispenser used for discharging a mixture of gas and a paste material includes: a nozzle part provided in a tip end part of a body and having a tip end opening through which the mixture is discharged; a flow path extending from a mixture introduction part to the tip end opening through a hollow space of the nozzle part; a needle part movable in the flow path of the nozzle part to open and close the flow path; a driving part that drives the needle part; and a stopper part that limits an operation range of the needle part. The nozzle part has a tapered section in which an inside diameter of the flow path of the nozzle part decreases toward the tip end opening. Also provided is a stopper position adjusting part that adjusts a stop position defined by the stopper part.