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Volume 60, Issue 6
Displaying 1-5 of 5 articles from this issue
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Effects of Shaping Air on Paint Particle FlowKazuyuki TACHI, Katsunori YAMADA, Chikaaki OKUDA, Shouichi SUZUKI1987 Volume 60 Issue 6 Pages 321-327
Published: June 20, 1987
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSThe spray pattern of an atomizer with a rotating cup is adjusted by the air passing over the outer surface of the cup, or the shaping air. The mechanism for the adjustment of the spray pattern has been studied by measurement of the radial profiles of air velocities, paint particle velocities and numbers at various shaping air flow rates using an X-type hot-wire anemometer and a laser doppler velocimeter.
A very small portion of the particles radiating from the cup edge travels to a substrate in the air flowing along the cup axis. However, most of the particles pierce the air flow near the cup and travel to the substrate in the stagnant air, forming a ring-shaped spray pattern on the substrate.
As the shaping air flow rate increases, the axial velocities of the air and the particles traveling in the flowing air increase, but the axial velocities of the particles traveling in the stagnant air hardly change. These results indicate that the spray pattern diameter decreases with the increase of the shaping air flow rate, because most of the particles are more greatly accelerated axially to approach the substrate until they pierce the air flow.View full abstractDownload PDF (812K) -
Seisirõ ITÕ, Shoji OGURA, Masami TANAKA1987 Volume 60 Issue 6 Pages 328-332
Published: June 20, 1987
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSThe authors formerly developed the method of coloring the anodic oxide film on aluminium with black as described below :
1. Heat up to about 300°C the aluminium plate coated with the anodic oxide film.
2. Blow against the plate the air containing vapor of organic compounds.
3. Make the thermal decomposition of the organic compounds proceed in the fine pores of the film, to deposit some high-carbon substances and make them stabilized.
This time the coloring conditions of this black film were examined using an apparatus somewhat improved, and simultaneously the surface analysis of the colored film was carried out. The various properties of the black film were also examined.
The significant results are the following :
1. The use of dicyclopentadiene for the organic compound enables to impart deep-black color to the film even under the treating conditions of 190°C and 5 minutes.
2. Carbon, the coloring component, penetrates into deepest part of the film.
3. This black film is not good in abrasion resistance and corrosion resistance but excels in light resistance and has similar hardness to the super hard film, together with very unique electric properties.View full abstractDownload PDF (647K) -
Susumu OKAZAKI1987 Volume 60 Issue 6 Pages 333-341
Published: June 20, 1987
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSDownload PDF (1395K) -
Tatuhiko IHARA1987 Volume 60 Issue 6 Pages 342-347
Published: June 20, 1987
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSDownload PDF (784K) -
Yuhei NEMOTO1987 Volume 60 Issue 6 Pages 348-355
Published: June 20, 1987
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSDownload PDF (1200K)
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