Spray Nozzle Integrated Venting Unit Air Removal
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Solution Overview
Problem
Existing spray nozzles for applying release agents to casting molds face issues with air accumulation in the dosing chamber, which prevents effective discharge of the release agent due to the compressibility of air, leading to incomplete or hindered spraying.
Innovation Solution
A spray nozzle with an integrated active venting unit that automatically adjusts from a dysfunctional to a venting and opening position upon activation, using control air to ensure air is removed from the dosing chamber, allowing the release agent to be discharged efficiently by maintaining the check valve open during venting and normal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air is present in the dosing chamber, then the compressibility of air prevents effective discharge of the release agent, but adding a venting unit increases device complexity
Solution Approach 1:
The venting unit is integrated into the existing nozzle housing structure, merging the venting function with the dosing chamber assembly rather than adding a completely separate system. The venting channel and check valve are incorporated within the existing housing geometry, reducing overall complexity while achieving reliable air removal.
Solution Approach 2:
The check valve automatically opens to vent air when pressure differential exists between the dosing chamber and atmosphere, then self-closes when pressure equalizes, eliminating the need for externally controlled venting mechanisms. The system uses its own operating pressure to drive the venting action.
2Productivity
If a venting unit is added to remove air, then air accumulation is eliminated, but the device complexity increases
Solution Approach 1:
The venting function extracts only the necessary air removal capability from the complex venting unit design, using a simple check valve and venting channel that tap into the existing pressure system. Only the essential venting function is implemented without additional control mechanisms.
Solution Approach 2:
The venting channel serves dual purposes: it provides a venting path for air removal and maintains pressure communication between the dosing chamber and discharge line during normal operation, allowing the same structure to support both venting and spraying functions.
3Ease of operation
If manual venting intervention is required, then air can be removed, but operation time and complexity increase
Solution Approach 1:
The check valve automatically activates venting when pressure differential exists between the dosing chamber and atmosphere, then self-closes when pressure equalizes, eliminating the need for externally controlled venting mechanisms. The system uses its own operating pressure to drive the venting action.
Solution Approach 2:
The venting channel is pre-configured to provide an immediate venting path as soon as pressure differential occurs, eliminating the need for activation delays or manual intervention steps.
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
Ensures proper functioning of the spray nozzle by eliminating air accumulation, allowing for effective discharge of the release agent, even under high compressibility conditions, through automatic venting without the need for manual intervention.
Implementation Method 1
the check valve is held open by the venting unit for venting the dosing chamber and the discharge line
Implementation Method 2
Because of the compressibility of the air in the dosing chamber the control movement of the dosing element is not or only partially converted into a displacement of the release agent
Data Source
AI summary
In a spray nozzle with a nozzle housing including a dosing chamber for accommodating a release agent to be sprayed into a mold via a discharge line including a check valve and a nozzle body and a venting unit integrated into the nozzle housing for venting air from the spray nozzle, the volume of the dosing chamber is adjustable and the venting unit is activatable by an activation signal by which the venting unit is moved from a dysfunctional position to a venting and opening position in which the check valve is held open by the venting unit for venting the dosing chamber and the discharge line, via the nozzle body.