Spray Nozzle Direction Changing Member for Tubular Coating
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Solution Overview
Problem
Existing spray nozzles for coating the inside surface of tubular containers tend to randomly splash the chemical solution outside the container, making it difficult to coat only a specific region effectively.
Innovation Solution
A coating apparatus with a spray nozzle featuring a spraying direction changing member that includes a cylindrical body with openings intersecting the direction of discharge, allowing the liquid substance to be sprayed only on a specific region by adjusting the bounce surface and angle, preventing random splashing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a spray nozzle is used to coat the inside surface of a tubular container, then the liquid substance can be applied to the container surface, but the liquid substance randomly splashes outside the container and cannot be confined to a specific region
Solution Approach 1:
The spray nozzle is divided into multiple functional components: an inner tube for liquid discharge, an outer tube for medium discharge, and a spraying direction changing member with multiple openings. This segmentation allows independent control of liquid flow and medium flow, enabling the liquid to be atomized and directed precisely along the container inner surface rather than randomly splashing outward.
Solution Approach 2:
The spraying direction changing member redirects the spray from a radial outward direction to an axial direction parallel to the container inner surface. By changing the spray dimension from radial to axial, the liquid is deposited along the container surface rather than splashing outside, achieving precise regional coating.
2Productivity
If the spray nozzle discharges liquid substance radially outward, then the liquid can be atomized effectively, but the spray direction cannot be restricted to a specific region
Solution Approach 1:
The spraying direction changing member features multiple openings distributed around its circumference, allowing the liquid substance to be discharged in multiple directions simultaneously. This segmentation of discharge paths enables comprehensive coverage of the container inner surface while maintaining controlled spray trajectories.
Solution Approach 2:
The spraying direction changing member transforms the radial spray pattern into an axial spray pattern that follows the container inner surface. This dimensional change allows the liquid to be atomized effectively while the spray direction is restricted to the container interior, achieving both high productivity and precise region control.
3Area of stationary object
If the spray nozzle is moved up to coat the entire region, then full surface coverage is achieved, but the process time increases and liquid may splash outside during movement
Solution Approach 1:
The spray nozzle incorporates multiple discharge openings in the spraying direction changing member, allowing simultaneous coating of multiple regions. This segmentation of discharge points enables parallel coating of different container surface areas, reducing the need for extensive nozzle movement and thereby decreasing process time while preventing splashing during transitions.
Solution Approach 2:
The spray nozzle design enables continuous coating action along the container inner surface without interruption for repositioning. The multiple openings provide continuous spray coverage as the nozzle moves, eliminating gaps and reducing the time required to achieve full surface coverage while maintaining controlled spray containment.
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 solution ensures precise coating of the liquid substance on a specific region inside the tubular container, reducing the likelihood of splashing outside and enhancing efficiency by restricting the spray direction.
Implementation Method 1
The chemical solution discharged from the distal end of the inner tube is turned into an aerosol by the gas, so that the chemical aerosol is sprayed from the tip of the spray nozzle
Implementation Method 2
a bounce part provided on the side beyond the openings of and at the distal end of the cylindrical body and having a bounce surface for bouncing off the sol
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
Provided is a coating apparatus in which a liquid substance is less likely to splash around and a chemical solution can be coated on a specific region of the inside surface of a tubular container. The coating apparatus 10 includes a spraying direction changing member 12, fixed to a tip portion of a spray nozzle 4 with an inner tube 6 and an outer tube 7, for changing the direction of spray of a sol oriented outward to a direction intersecting a direction of discharge of the liquid substance from the inner tube 6.