Spray Nozzle Path Changing Section for Film Region Control
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Solution Overview
Problem
Conventional cold spray methods face inefficiencies in forming films in desired regions due to masking, which decreases film formation efficiency and makes it difficult to control the film region accurately.
Innovation Solution
A spray nozzle with a path changing section that alters the trajectory of the film material, allowing for precise control of the film region on the base material by changing the path of the film material as it is sprayed, using a path changing section with a cross-sectional shape that intersects the carrier gas flow, such as a triangle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If masking is used to form a film in a desired region, then the film region can be controlled, but film formation efficiency decreases
Solution Approach 1:
The invention extracts the film formation control function from the masking process and integrates it directly into the nozzle structure through path changing sections. The path changing sections are provided inside the nozzle body to alter the carrier gas flow path, thereby controlling the film formation region without requiring external masking. This eliminates the need for masking while maintaining precise film region control and improving overall film formation efficiency.
2Productivity
If a conventional nozzle with an opening at the tip section is used, then film formation can proceed, but it is not easy to control the film region efficiently
Solution Approach 1:
The invention introduces path changing sections that extend in specific directions (first direction and second direction perpendicular to the carrier gas flow direction) within the nozzle body. These path changing sections create three-dimensional flow path alterations, enabling precise control over the carrier gas flow direction and thereby achieving efficient film region control that conventional tip openings cannot achieve.
3Manufacturing precision
If the nozzle main body is redesigned to control film region, then film region control is improved, but device complexity increases
Solution Approach 1:
The invention segments the nozzle structure into distinct functional sections: a nozzle body, a nozzle tip section, and path changing sections. The path changing sections are provided as separate components within the nozzle body, each responsible for specific flow path alterations. This segmentation allows for easier manufacturing and assembly while achieving precise film region control, avoiding the need for complete redesign of the entire nozzle main body.
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 easy control and expansion of the film region on the base material, improving film formation efficiency and allowing for more precise patterning compared to conventional nozzles, which typically require redesigning the nozzle main body and considering gas pressure and flow rate.
Implementation Method 1
causing a carrier gas whose temperature is lower than a melting point or a softening temperature of a film material to flow at a high speed
Implementation Method 2
forming a film by causing the film material to collide with, for example, a substrate at a high speed
Data Source
Figure 1~2
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AI summary
The present invention provides a spray nozzle and the like each of which can control a film region easily. A spray nozzle (10) includes: a nozzle main body (1, 2, 3); a nozzle tip section (4) connected to a tip of the nozzle main body (1, 2, 3); and at least one path changing section (6) which is provided in a passage of the carrier gas in the nozzle tip section (4) and changes a path of the film material. A cross section of the at least one path changing section (6) which cross section is taken along a direction in which the carrier gas flows is in a shape that allows the path of the film material to be changed so that the film material is delivered onto the base material. The cross section of the at least one path changing section (6) which cross section is taken along a direction in which the carrier gas flows is in a shape of a triangle, and one of three sides of the triangle is parallel to a surface of the base material. Further, a film forming device and a film forming method are provided.