¡@
Filtering principle
|
¡@ ¡@ |
1. By use of ¡§Negative Pressure¡¨ to attract
overspray
2.
When the exhausting fan of the booth is
turned on, a strong ¡§Negative Pressure¡¨ will
be created to attract the overspray.
Overspray & water mixture will be
co-entrained into the booth by the high
velocity of air flow created by the fan.
An
extreme turbulence as ¡§Tornado Effect¡¨ will
be formed to scrub the overspray in the
washing tank. Only exhausted gas will flow
outside ¡V so it can nearly 100% wash away
the overspray.
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Advantages |
¡@ |
Any uncaptured overspray (VOC and phosphoric acid) will be present in an
insignificant amount and within the OEL set by the Labour Department of Hong
Kong¡@ ¡@
|
¡@
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EYE
FRAMES SPRAY BOOTH
-------------------------------------------------------------------------
¡@
PLASTIC &
METAL EYE FRAME
SPRAY BOOTH
|
¡@ ¡@ |
¡@
1. frame
rotation speed and gun movement (both
direction & speed) are adjustable on all
axes
2. entirely made of stainless steel
3. equipped
with 2 automatic spray guns
4.
capacity of pieces holder rack: 18 frames
5.
production rate: 800-1200 frames per hour
6.
External overall dimension: LxWxH =
2000x1410x2620mm |
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|
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¡@
METAL EYE FRAME
SPRAY BOOTH
|
¡@ ¡@ |
¡@
1.
frame rotation speed
and spray angle can be
adjustable for even coating
2.
equipped with spray gun holder
for ¡§Graco¡¨
automatic electro-static gun (gun is not included)
3.
suitable for watch and small
accessories
spraying
4.
capacity of pieces holder rack: 18 frames
5.
production rate: 800-1200 frames
per hour
6. Working
area dimension: LxWxH
= 1950x1800x1300mm
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|
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¡@
¡@
RACK ROTATION CABINET |
¡@ ¡@ |
¡@
1.
coated frames should be
allowed for rotation in the Rack Rotation Cabinet
immediately after coating and before drying in the static oven
2. with the Rotation, formation of drops can be avoided
and the fresh varnish
remains smooth on the surface of the frames
3.
Features:
a.
can hold 10 racks of coated frames
b. rotation time: 3-6 minutes
c. dimension: LxWxH = 1200x550x1700mm
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|
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|
|
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¡@
¡@
STATIC OVEN FOR FRAME
DRYING
|
¡@ ¡@ |
¡@
1. Heating
by convention
"horizontal hot air circulation"
& equipped with
"interlock
hot air supply"
to avoid the risk of sudden temperature rise
2.
Oven
temperature: ambient to 220¢J,
thermostatic,
self-timing with explosion proof window and
fresh air supply by convention
3.
Perfect insulation: oven outside
temperature is less than 40¢J, so
heat loss can be minimized
4.
Control panel composed of: master
switch, thermostatic, automatic drying timer with
alarm, indication lights and
explosion-proof window
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|
|
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OES
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1.
²Ä¤@Ó¼o®ð¼Ë¥»©ó¥»¼t¼Ð·Ç¼QÏ@©â¨ú
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|
COMPONENT
VOC
|
OES
Limit |
Sampling
with standard Water-Wash Spray
Booth
(Shenzhen: 7/1/98) |
Sampling with Specially made Water-Wash
Spray Booth
(Chek Lap Kok:30/7/98) |
Isopropyl alcohol
¡@ |
400ppm |
<0.1ppm |
<0.1ppm |
n-butyl alcohol
¡@ |
50ppm |
<0.1ppm |
<0.1ppm |
Ethanol
¡@ |
200ppm
¡@ |
0.5ppm
¡@ |
<0.1ppm |
Methylethyl ketone |
1000ppm |
6.8ppm |
2.8ppm |
Phosphoric acid |
1mg/m3 |
0.2mg/m3 |
<0.05mg/m3 |
¡@
Conclusion
The
concentrations of five different parameters in the paint
mist were measured at Shenzhen (7-1-98) and Chek Lap Kok
(30-7-98) respectively and the results are presented. It is
concluded that the VOC (including Isopropyl alcohol, n-butyl
alcohol, Ethanol, Methylethyl ketone) and Phosphoric acid
arepresent in an insignificant amount and within the OES
limit.
¡@
¡@
A note on the quoted OES listed in the above table
The
full name of OES is Occupational Exposure Standard and it is a concentration
of an specific airborne Substance averaged over a reference
period at which there is currently no evidence that
repeated or day after day exposure by inhalation, will be
injurious to the Health of employees. The OES¡¦s
should not be exceeded but if this does occur,
effective measure should be taken to reduce the exposure as soon
as practicable.
The OES quoted here is based on the
EH40 which is a part of The Control of Substances
Hazardous to Health (COSHH) regulations established by
the Health and Safety Executive of UK.
The objective of this regulation is
to prevent disease at workplace due to exposure of
hazardous substances.
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OEL ¼Ð·Ç |
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¤¤°ê°ê®a¼Ð·Ç
GB/T 16157-1996 |
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