Dual-Body Nozzle with Gas Channel for String-Free Dispensing
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Solution Overview
Problem
Conventional fluid material dispensing systems often produce strings of fluid material between the nozzle and the bead dispensed on a substrate, which is a problem in achieving precise and clean dispensing.
Innovation Solution
A nozzle design comprising a first and second nozzle body with a space between their outer and inner surfaces, allowing for the discharge of pressurized gas to deform the bead and break the string, while both fluid material and gas share a single inlet and are directed through separate channels within the nozzle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional nozzles are used to dispense fluid material, then the dispensing process is simple, but strings of fluid material are produced between the nozzle and the bead
Solution Approach 1:
The nozzle is divided into two separate bodies: a first nozzle body that dispenses fluid material and a second nozzle body that dispenses gas. This segmentation allows independent control of fluid and gas discharge, enabling precise bead formation while eliminating strings by using gas to sever them.
Solution Approach 2:
Gas is introduced as an intermediary substance between the fluid material nozzle and the substrate. The gas acts as a mediator that breaks the string of fluid material formed during dispensing, allowing clean bead formation without direct contact between the fluid nozzle and substrate.
2Reliability
If gas is used to break the string and clean the nozzle tip, then clean dispensing is achieved, but the device complexity increases
Solution Approach 1:
The gas discharge function and fluid material dispensing function are merged into a single integrated nozzle assembly. The first and second nozzle bodies are coupled together to form one unit, simplifying the overall system while achieving clean dispensing through gas-assisted string breaking.
Solution Approach 2:
The nozzle assembly performs multiple functions: dispensing fluid material, dispensing gas, breaking strings, and cleaning the nozzle tip. This multi-functionality is achieved within a single integrated structure, improving reliability without proportionally increasing 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
The nozzle effectively breaks the string of fluid material, ensuring clean dispensing and allowing for precise control over the bead shape, with the gas discharge also cleaning the nozzle tip.
Implementation Method 1
The second channel is configured to receive at least a portion of the first nozzle body therein such that at least a portion of the first outer surface is inwardly spaced from the second inner surface so as to define a space between the first outer surface and the second inner surface configured to direct a gas to a nozzle tip
Data Source
AI summary
In one example, a nozzle of a fluid material dispenser has a first nozzle body and a second nozzle body. The first body has a first inlet end, a first outlet end, a first outer surface extending, and a first inner surface. The first inner surface defines a first channel that can direct a fluid material from the first inlet end to the first outlet end. The second body has a second inlet end, a second outlet end, a second outer surface, and a second inner surface. The second inner surface defines a second channel that can receive at least a portion of the first nozzle body therein such that the first outer surface is inwardly spaced from the second inner surface so as to define a space between the first outer surface and the second inner surface. The space can direct a gas to the second outlet end.