Reversible Spray Gun Nozzle Self-Cleaning via Position Rotation
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Solution Overview
Problem
Existing spray gun nozzles often become blocked by particles in the coating material, requiring manual cleaning and potential damage, which is time-consuming and may result in nozzle replacement, with no efficient self-cleaning solution available in prior art.
Innovation Solution
A reversible coating material nozzle designed for easy installation and removal from a spray gun without tools, featuring a nozzle core and nipple with form-fitting cylindrical and conical portions, made from durable materials like carbide metal or ceramic, and a snap-fit connection, allowing for automatic centering and self-cleaning by rotating positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual cleaning of the coating material nozzle is performed, then the nozzle can be cleaned of particles, but the process requires a lot of time and may result in nozzle damage
Solution Approach 1:
The nozzle is designed to perform self-cleaning by reversing its installation position. The conical section that normally directs coating material forward now faces backward, allowing coating material sprayed in reverse direction to clean the nozzle channel internally, eliminating manual cleaning requirements and preventing damage from manual intervention
Solution Approach 2:
The nozzle is designed with reversible functionality, allowing it to dynamically switch between coating mode and self-cleaning mode by changing its installation orientation. This dynamic adaptation enables the nozzle to clean itself without manual intervention, reducing cleaning time and preventing damage
2Ease of operation
If the coating material nozzle is designed for easy removal and installation without tools, then the ease of operation is improved, but the manufacturing precision requirements increase due to the form fit connection
Solution Approach 1:
The nozzle is segmented into distinct functional sections: a cylindrical portion for easy insertion, a conical portion for self-centering form-fit connection, and a threaded portion for secure mounting. This segmentation allows each section to perform its specific function optimally while maintaining ease of operation
Solution Approach 2:
The nozzle features an asymmetric conical section that creates a form-fit connection with corresponding asymmetric geometry in the spray gun mount. This asymmetric design provides precise self-centering during installation while maintaining ease of operation, as the conical geometry guides the nozzle into correct alignment automatically
Data Source
AI summary
The reversible coating material nozzle for a spray gun for coating a workpiece with coating material can be installed in a first and a second installation position in a nozzle mount of the spray gun and comprises a nozzle core having a nozzle core opening and a nozzle nipple that is connected to the nozzle core and has a nozzle nipple opening. In addition, a nozzle channel for the coating material is provided and reaches through the nozzle nipple and the nozzle core and connects the nozzle nipple opening to the nozzle core opening. The nozzle nipple has a cylindrical portion, which in the first installation position forms a form fit with the nozzle mount of the spray gun. In addition, a stop is provided. The ratio between the length (L) from the stop to the cylindrical portion and the nozzle diameter (D) lies in the range between 0.75 and 2.00.