Multi-nozzle Device Discharge Control via Nozzle Geometry
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Solution Overview
Problem
Existing multi-nozzle devices for applying viscous liquids to workpieces, such as disk drive suspensions, face challenges with complexity and weight due to valve mechanisms, making it difficult to achieve high-speed movement and precise positioning, especially when applying adhesive to multiple locations simultaneously.
Innovation Solution
A multi-nozzle device design that eliminates the need for a valve mechanism by using a reference nozzle and a specific nozzle with different lengths or inner diameters, allowing for controlled fluid discharge without increasing the device's complexity or weight, where the specific nozzle's dimensions can be adjusted based on the required discharge amount using the Hagen-Poiseuille formula.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a valve mechanism is installed in each nozzle to control the amount of adhesive discharged, then the discharge amount can be adjusted, but the device size increases and the structure becomes complex and heavy
Solution Approach 1:
The patent changes the physical parameters of the nozzles themselves (length and inner diameter) to control discharge amount. By making the nozzle inner diameter or length different for each nozzle, the discharge characteristics are adjusted without any moving parts or valve mechanisms. This directly resolves the contradiction by achieving precise discharge control through static geometric parameters rather than complex mechanical valves.
2Manufacturing precision
If a valve mechanism is installed in each nozzle to control the amount of adhesive discharged, then the discharge amount can be adjusted, but the device becomes heavy
Solution Approach 1:
The patent eliminates heavy valve mechanisms by changing the geometric parameters (length and inner diameter) of the nozzles. This static parameter adjustment achieves the same discharge control function without adding significant weight, as the nozzles themselves are simply shaped differently rather than containing moving valve components.
3Manufacturing precision
If a valve mechanism is installed in each nozzle to control the amount of adhesive discharged, then the discharge amount can be adjusted, but the device size increases
Solution Approach 1:
The patent achieves discharge control by varying the nozzle length parameter directly, eliminating the need for additional valve mechanism housing and components. This approach keeps the overall device size compact while still providing precise control over adhesive discharge amounts through the geometric configuration of each nozzle.
4Manufacturing precision
If the multi-nozzle device structure becomes complex and heavy, then discharge control is improved, but high-speed movement and precise positioning become difficult
Solution Approach 1:
By using static geometric parameter variations in the nozzles rather than complex valve mechanisms, the patent achieves discharge control without adding the mass and mechanical complexity that would hinder high-speed movement and precise positioning. The simplified structure enables faster acceleration and positioning while maintaining accurate adhesive application.
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
Enables efficient and accurate application of adhesive to multiple locations on a workpiece without the need for a valve mechanism, improving the device's speed and precision while maintaining a simple and lightweight structure.
Implementation Method 1
the specific nozzle's dimensions can be adjusted based on the required discharge amount using the Hagen-Poiseuille formula
Data Source
AI summary
A multi-nozzle device includes a nozzle body having a chamber into which fluid enters, a reference nozzle and a specific nozzle. The reference nozzle and the specific nozzle are each provided in the nozzle body. The inflow ends of the nozzles are communicated to the chamber. The outflow ends of the nozzles protrude from an end surface of the nozzle body. A length of the specific nozzle and a length of the reference nozzle differ from each other depending on the target discharge amount of the reference nozzle and the target discharge amount of the specific nozzle. An inner diameter of the specific nozzle and an inner diameters and of the reference nozzles and may be different from each other.