faktor-faktor yang mempengaruhi...
TRANSCRIPT
![Page 1: Faktor-faktor yang mempengaruhi warnastaffnew.uny.ac.id/.../pendidikan/Pert+15+Faktor+Hasil+Pengecatan.pdf · peralatan terang gelap TEKANAN ALIRAN FLUID/VOLUME 1BAR 4BAR SPRAY GUN](https://reader034.vdocuments.pub/reader034/viewer/2022052216/5c98426709d3f21c248b8a1f/html5/thumbnails/1.jpg)
• Lingkungan
• Produk
• Aplikasi
• Peralatan
Faktor-faktor yang mempengaruhi warna
![Page 2: Faktor-faktor yang mempengaruhi warnastaffnew.uny.ac.id/.../pendidikan/Pert+15+Faktor+Hasil+Pengecatan.pdf · peralatan terang gelap TEKANAN ALIRAN FLUID/VOLUME 1BAR 4BAR SPRAY GUN](https://reader034.vdocuments.pub/reader034/viewer/2022052216/5c98426709d3f21c248b8a1f/html5/thumbnails/2.jpg)
Kondisi-kondisi lingkungan terang gelap
SUHU
CUACA
KEC. UDARA
Faktor-faktor yang mempengaruhi warna
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peralatan terang gelap
TEKANAN
ALIRAN FLUID/VOLUME
1BAR
4BAR
SPRAY GUN
AIR CAP
FAN
HVLP GUN
Faktor-faktor yang mempengaruhi warna
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mempengaruhi tampilan warna dan orientasi dari flake-flake metal / mica
terang gelap
KECEPATAN
OVERLAPPING
THINNER
TEBAL FILM
Faktor-faktor yang mempengaruhi warna
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terang gelap
KEKENTALAN
WAKTU FLASH
JARAK
JUMLAH LAPISAN
faktor-faktor lainnya
Faktor-faktor yang mempengaruhi warna
![Page 6: Faktor-faktor yang mempengaruhi warnastaffnew.uny.ac.id/.../pendidikan/Pert+15+Faktor+Hasil+Pengecatan.pdf · peralatan terang gelap TEKANAN ALIRAN FLUID/VOLUME 1BAR 4BAR SPRAY GUN](https://reader034.vdocuments.pub/reader034/viewer/2022052216/5c98426709d3f21c248b8a1f/html5/thumbnails/6.jpg)
Infra-Red Drying
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Medium
Wave
IR
Long
Wave
IR
Short
Wave
IR
0 2 4 6
Approximate wavelength in microns
The Infra-Red Spectrum
Cosmic Rays X Rays Ultra
Gamma Rays Violet
Vis
ible
Infra-Red
Ce
ntim
ete
r
Wa
ve
s
Ultra
Short
Wa
ve
s
Sh
ort
Wa
ve
Ra
dio
Bro
ad
ca
st
Ra
dio
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Long Wave
Paint Substrate
IR Equipment
Paint Substrate
Medium Wave
IR Wavelength Comparison
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Paint Substrate
Short Wave
IR Equipment
IR Wavelength Comparison cont
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4Better workshop productivity
4Faster through drying
4Time saving
4lower energy consumption
4Greater economy
4Increased profit
IR Equipment Advantages
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4The shorter the waveband,
the higher the temperature
produced
Long wave ?
Medium wave ?
Short wave ?
IR Equipment performance
4The difference in the wave forms is
the depth of penetration through
the paint film
4Short wave has greater penetration
than medium or long wave
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The most commonly used type for drying materials such
as :-
4Inks
4Textiles
4Adhesives
Long Wave IR Equipment
Not recommended for:- Paint drying due to slow heating times
and can give skinning of the paint film producing solvent blisters
Will not penetrate the paint film. Surface drying only!
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Medium Wave IR Equipment
4Penetrates further into the paint
film
4More efficient than long wave IR
can reach a higher temperature
than long wave
4Less critical than long wave
regarding blistering, due to the
slow increase of metal temperature
4Normally needs no flash off time
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4Penetrates the paint film
4More efficient than medium wave
4Can reach a higher temperature
4Faster than medium wave
4Has a flash off to remove solvents
4This gives security against blistering
Short wave is considered to be the most efficient form of IR drying available today
Short Wave IR Equipment
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Time studies for Waterborne Basecoat
Spot repair
Air drying IR Low-bake Blowing
SPOT
REPAIR Conventional
Basecoat
Water-borne
Basecoat
spray pass 1 & 2
1st drying
spray pass 1 & 2
2nd drying
cooling time
TOTAL
0,5mm
6-7min
6-7min
0,5min
15min
15min
0,5min 0,5min 0,5min
4-8min
5-6min
9-14min
5-10min
5-6min
10-16min
6-8min
6-8min
Recorded at normal conditions 22°C 30% - 35% relative humidity
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Time studies for Waterborne Basecoat
Part repair
Air drying IR Low-bake Blowing
Partial
Repaint Conventional
Basecoat Water-borne
Basecoat
spray pass 1 & 2
1st drying
spray pass 1 & 2
2nd drying
cooling time
TOTAL
4mm
10min
4min
20min
24min
4min 4min 0,5min
4min
5-6min
14min
5-10min
5-6min
14-19min
6-8min
10-12min
Recorded at normal conditions 22°C 30% - 35% relative humidity
14min
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Time studies for Waterborne Basecoat
Overall repair
Air drying IR Low-bake Air Nozzle
Overall
repair Conventional
Basecoat
Water-borne
Basecoat
spray pass 1 & 2
1st drying
spray pass 1 & 2
2nd drying
cooling time
TOTAL
12mm
10-15min
12min
20-30min
32-42min
12min 12min 12min
10min
5-6min
27-28min
15min
5-6min
32-33min
15min
27min
Recorded at normal conditions 22°C 30% - 35% relative humidity
22-27min