Rotary Atomizing Head With Overlapped Rims For Low-Speed Coating
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Solution Overview
Problem
Existing rotary atomizing electrostatic coating machines face challenges in achieving high deposition efficiency while minimizing VOC and CO2 emissions, as increasing rotational speed to enhance atomization leads to energy consumption and scattering of coating mist, and reducing coating material supply at low speeds results in insufficient film thickness and lowered production efficiency.
Innovation Solution
A rotary atomizing head with a plurality of overlapped frustconical rims that receive a reduced coating material supply, allowing for atomization at lower rotational speeds, thereby improving deposition efficiency and reducing VOC and CO2 emissions without compromising production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the rotational speed of the rotary atomizing head is increased to enhance atomization, then the atomization effect is improved, but the scattering of coating mist increases and energy consumption increases
Solution Approach 1:
The single rim structure is divided into multiple rims (first rim, second rim, third rim, fourth rim) arranged in an overlapping configuration. This segmentation allows the coating material to be distributed across multiple atomization surfaces, improving atomization effectiveness at lower rotational speeds and reducing energy consumption while minimizing coating mist scattering.
2Manufacturing precision
If the rotational speed of the rotary atomizing head is increased to enhance atomization, then the atomization effect is improved, but the scattering of coating mist increases
Solution Approach 1:
The single rim structure is divided into multiple rims (first rim, second rim, third rim, fourth rim) arranged in an overlapping configuration. This segmentation allows the coating material to be distributed across multiple atomization surfaces, improving atomization effectiveness at lower rotational speeds and minimizing coating mist scattering.
Solution Approach 2:
The rims are arranged in an overlapping three-dimensional configuration rather than a single plane, creating multiple atomization zones at different radial positions. This dimensional arrangement enhances atomization coverage and reduces mist scattering without requiring high rotational speeds.
3Loss of energy
If the amount of coating material supplied is decreased to enable low speed rotation, then energy consumption is reduced, but the jetting amount becomes insufficient and production efficiency lowers
Solution Approach 1:
The coating material flow is segmented and distributed across multiple rims (first, second, third, and fourth rims). This allows the total coating material supply to be maintained at appropriate levels for each rim while enabling lower rotational speeds, thus reducing energy consumption while preserving production efficiency through the cumulative effect of multiple atomization zones.
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 enables efficient atomization at lower rotational speeds, reducing energy consumption, minimizing coating material wastage, and ensuring necessary film thickness, thus enhancing production efficiency and environmental sustainability.
Implementation Method 1
a substantially frustconical rim is formed on the frontal side for spreading the coating material caused to flow from the coating material chamber by a centrifugal force
Implementation Method 2
atomizing the same at the top end thereof
Data Source
AI summary
A coating machine is capable of reducing VOC and CO2 by atomizing a paint to increase depositing efficiency without lowering production efficiency and the rotary atomizing head of the coating machine. The coating machine includes the rotary atomizing head in which a paint chamber receiving the supply of paint is formed on the rear side thereof. A plurality of rims formed in a roughly truncated conical shape for extending the paint flowing out of the paint chamber by a centrifugal force and atomizing the paint at the tip thereof are fitted in the rotary atomizing head overlappingly at specific clearances. The clearances are opened to the peripheral surface part of the paint chamber. Accordingly, VOC and CO2 can be reduced by reducing the total jetted amount of paint to enable the atomization of the paint at low rotating speeds so as the increase the deposit efficiency.