Spray Gun Diaphragm Actuation via Pressurized Fluid
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing spray gun systems with paint storage containers face challenges in achieving the desired actuation speed due to insufficient spring preload to counteract ink pressure, often requiring lower ink pressure or additional mechanisms, which can hinder efficient paint application.
Innovation Solution
The system connects a compressed air space to the pressure space, using pressurized fluid to actuate the nozzle needle, allowing for adjustable and regulated pressure to ensure the nozzle is securely closed with minimal spring force, and utilizing electromagnetic actuation for enhanced control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spring preload is increased to counteract ink pressure, then nozzle closure reliability is improved, but actuation speed deteriorates due to excessive force requirements
Solution Approach 1:
A membrane is introduced as an intermediary element between the ink pressure source and the nozzle needle. The membrane transmits ink pressure to actuate the nozzle needle, replacing the direct spring-loaded mechanism. This intermediary allows the system to achieve reliable nozzle closure through fluid pressure transmission while enabling faster actuation speeds by eliminating the need for high spring forces.
Solution Approach 2:
The traditional spring-loaded mechanical actuation system is replaced with a fluid pressure-based actuation system. Instead of using spring force to counteract and overcome ink pressure, the system uses ink pressure itself (transmitted through the membrane) to actuate the nozzle needle. This substitution of mechanical spring force with fluid pressure transmission resolves the contradiction by achieving reliable closure without requiring excessive actuation force.
2Ease of operation
If ink pressure is reduced to accommodate insufficient spring preload, then actuation becomes easier, but paint application efficiency deteriorates
Solution Approach 1:
The membrane serves as a mediator that allows the system to maintain optimal ink pressure for efficient paint application while still achieving easy actuation. The membrane transmits the full ink pressure to the nozzle needle, eliminating the need to reduce ink pressure to compensate for insufficient spring preload.
Solution Approach 2:
By replacing the spring-loaded mechanical system with a fluid pressure transmission system through the membrane, the system can operate at optimal ink pressures for paint application efficiency. The fluid pressure system naturally transmits force without the losses and limitations of mechanical spring systems, maintaining both ease of operation and high productivity.
3Reliability
If additional actuation mechanisms are added to compensate for insufficient spring preload, then nozzle control is improved, but system complexity increases
Solution Approach 1:
The membrane serves multiple functions simultaneously: it seals the ink reservoir, transmits ink pressure to actuate the nozzle needle, and allows for pressure regulation. This multi-functionality eliminates the need for additional separate actuation mechanisms, maintaining reliable nozzle control while avoiding increased system complexity.
Solution Approach 2:
The membrane as an intermediary element provides a simple yet effective solution that replaces complex additional actuation mechanisms. By using the membrane to transmit and regulate pressure, the system achieves improved nozzle control through a single, integrated component rather than multiple additional mechanisms.
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
This configuration ensures balanced forces for easy and quick actuation of the marking gun, allowing for efficient paint application with precise control over pressure, eliminating the need for high spring force and ensuring the nozzle remains closed under varying pressures.
Implementation Method 1
the membrane provided for sealing also allowing the movement required to open and close the spray gun
Implementation Method 2
the paint in the paint storage container can be pressurized with compressed air for entry into the spray gun
Implementation Method 3
a fluid located therein can be provided by the movement of the membrane itself when the pressure is off on the other side prevails in the color space, creates the back pressure in the space
Data Source
Figure 1
AI summary
The invention relates to a spray gun for spraying paint (21) or the like, comprising a gun body and a spray nozzle (2), wherein a nozzle needle (3) passes through a diaphragm (8) firmly connected to the nozzle needle (3), which seals a fluid-tight chamber (16) facing away from the spray nozzle (2) and through which the nozzle needle (3) passes, while simultaneously allowing the movement necessary for opening and closing the spray gun. It is proposed that the chamber (16) be pressurized by a fluid for use as a pressure chamber. Furthermore, the invention relates to a method for actuating a spray gun designed as a marking gun (1), wherein the pressure acting on the paint in the paint reservoir (19) for dispensing the paint (21), preferably pressure built up by means of compressed air, is used to actuate the nozzle needle (3) of the spray gun in the closing direction.