Air-Pressurized Nozzle for Precise Viscous Fluid Dispensing
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Solution Overview
Problem
Existing nozzle systems for distributing viscous fluids, such as solder paste and resin, face challenges with low distribution efficiency, controllability, and a tendency to blockage due to the low flowability of these materials in electronic processing.
Innovation Solution
A nozzle design incorporating an airflow system that uses a piston chamber and separate fluid passage, where airflow from an inlet is used to press viscous fluids out of the nozzle, preventing blockages and enhancing control over fluid distribution, with a piston that moves to facilitate fluid flow without direct contact, ensuring efficient and precise distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a piston is used to extrude viscous fluid through reciprocating movements, then the fluid can be distributed, but the distribution efficiency is low and blockage tendency increases
Solution Approach 1:
The patent introduces air as an intermediary substance to transfer the extrusion force. Instead of the piston directly contacting and extruding the viscous fluid, the piston extrudes air which then acts on the fluid surface to push it through the nozzle. This intermediary approach reduces direct mechanical contact and friction, improving distribution efficiency while reducing blockage tendency.
Solution Approach 2:
The patent applies pneumatic principles by using compressed air to extrude the viscous fluid. The air pressure generated by piston reciprocation is transmitted through the air-fluid interface to push the fluid through the nozzle passage, replacing direct mechanical extrusion with pneumatic pressure transmission.
2Ease of operation
If direct piston contact with fluid is used for extrusion, then fluid can be pushed out, but controllability and precision are reduced
Solution Approach 1:
Air serves as a controllable intermediary between the piston and fluid. The air pressure can be precisely controlled through the piston's reciprocation parameters, providing better controllability and precision for fluid distribution compared to direct mechanical contact.
Solution Approach 2:
The patent controls fluid distribution by changing the parameters of air pressure and piston reciprocation. By adjusting the piston's movement speed, stroke, and frequency, the air pressure applied to the fluid can be precisely controlled, thereby achieving better distribution precision and controllability.
3Device complexity
If a single integrated chamber is used for fluid storage and piston movement, then device complexity is reduced, but fluid distribution precision deteriorates
Solution Approach 1:
The patent divides the device into functionally independent segments: a fluid storage chamber for holding the viscous fluid and a piston chamber for generating air pressure. This segmentation allows each chamber to be optimized for its specific function, improving fluid distribution precision while maintaining reasonable device complexity.
Solution Approach 2:
The segmented structure introduces air as an intermediary between the piston chamber and fluid chamber. The air acts as a pressure transmission medium, allowing precise control of fluid extrusion without requiring direct mechanical coupling between the piston and fluid, thereby improving distribution precision.
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 system effectively distributes small volumes of viscous fluids with improved efficiency and controllability, reducing the likelihood of blockages and allowing for precise application in electronic processing, particularly suitable for chip-level applications.
Implementation Method 1
the airflow exerted from the airflow inlet can press the fluid in the nozzle passage out of the airflow outlet
Data Source
AI summary
A nozzle includes a nozzle passage and a fluid passage. The nozzle passage has an airflow inlet and an airflow outlet. The fluid passage has a fluid passage inlet and a fluid passage outlet. The fluid passage inlet communicates with a fluid source so that a fluid can enter the fluid passage, and the fluid passage outlet communicates with the nozzle passage so that the fluid can enter the nozzle passage, and the airflow exerted from the airflow inlet can press the fluid in the nozzle passage out of the airflow outlet. The nozzle provided by the present application can distribute a small volume of a viscous fluid and is not apt to get blocked.