Spray Gun Lancehead Nozzle Positioning and Air Flow Control
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Solution Overview
Problem
Current lance designs for spraying coatings are cumbersome, require adjustments for different nozzle diameters, and suffer from blockages and wear issues, making them difficult to use and maintain.
Innovation Solution
A lance head with a molded, ergonomic design featuring a movable nozzle and fixed air injector, integrated air valves, and a locking screw, allowing for adjustable nozzle positioning and precise air flow control, reducing blockages and wear, and improving user ergonomics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the air injector is made movable to adjust position, then the jet width can be varied, but the device complexity increases and adjustment time is lost
Solution Approach 1:
Instead of making the air injector movable to adjust jet width, the patent inverts the approach by making the nozzle movable relative to the fixed air injector. The nozzle is equipped with a threading mechanism that allows it to be screwed forward or backward along the lance axis, thereby adjusting the jet width while keeping the air injector stationary and simple.
2Device complexity
If the nozzle face is made perpendicular to product outlet flow, then the structure is simple, but clogging risk increases
Solution Approach 1:
The patent applies asymmetry by designing the nozzle face at an angled orientation rather than perpendicular to the product outlet flow. This asymmetric configuration allows the coating material to flow smoothly along the nozzle surface, preventing particles from settling and causing clogs, while maintaining a relatively simple nozzle structure.
3Ease of operation
If integrated air valves are added to the lance head, then air flow control is improved, but the device complexity increases
Solution Approach 1:
The patent merges the air valves directly into the lance head body, integrating the air supply and exhaust valve mechanisms within the existing lance structure. This consolidation allows for intuitive air flow control during operation while avoiding the need for separate external valve assemblies, thereby limiting the increase in device complexity.
4Ease of manufacture
If the thread in the lance body is used for retaining screw, then assembly is simple, but wear occurs quickly
Solution Approach 1:
The patent extracts the threading mechanism from the lance body and relocates it to the nozzle itself. The nozzle is now equipped with external threading that engages with a corresponding threaded section on the lance head, separating the wear-prone threading function from the main lance body structure. This allows the retaining screw to engage with the nozzle's thread rather than the lance body thread, preserving the simplicity of assembly while improving durability.
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 lance head provides a more intuitive and durable solution for spraying coatings, ensuring proper nozzle alignment, reducing unwanted projections, and allowing for varied jet widths, enhancing the efficiency and reliability of the coating application process.
Implementation Method 1
Compressed air is introduced into the spray lance, thus producing a more or less wide jet that allows the mortar to adhere to its substrate
Implementation Method 2
A locking screw in the body of the lance head allows it to be held in place
Implementation Method 3
Nozzles are conical and channel the product well towards the outlet
Data Source
Figure 1A~1C
Figure 2~4A
Figure 4B~4D
AI summary
The invention relates to a spray gun head (100) for spraying coatings, comprising a body (101) made by molding, a nozzle (102) movable by screwing and a fixed air injector (103), comprising a supply valve (104) and an exhaust valve (105), which allow adjustment of the air flow in the spray gun head (100), in which said nozzle (102) is screwed onto said body (101), allowing proper adjustment of its position relative to the injector (103), and comprising a locking screw (106), allowing the injector (103) to be held in its position after it has been put in place.