Techcon2019_MSTR_f.pdf - 第40页
Corporate Headquarters (United States) OK International/ Techcon Headquarters 10800 V alley Vie w Street Cypres s, CA 90630 T el: 1-714-230-2398 Fax: 1- 714-230-2393 Email: oemorders@okint ernational.com European Corpora…
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Tutorial
Time-Pressure Dispensing
Tutorial
Time-Pressure Dispensing
Time pressure dispensing is the most common dispensing
method used today. Its popularity stems from the need for
process control and the fact that it is possible to dispense
from disposable containers without the need for cleaning.
Our time-pressure dispensers deliver a measured amount of
air pressure, for a measured amount of time, to a pre-filled sy-
ringe barrel. This controlled shot of air pressure forces mate-
rial out of the delivery end of the barrel, through a dispensing
tip and out to the application surface.
Shot Size Chart
Dot Diameter Dot Volume Dot Size
(actual)
0.010" (0.25mm) 0.0000043 cc
0.020" (0.51mm) 0.00003 cc
0.030" (0.76mm) 0.0001 cc
0.040" (1.02mm) 0.0003 cc
0.050" (1.27mm) 0.0005 cc
0.060" (1.52mm) 0.0009 cc
0.070" (1.78mm) 0.0015 cc
0.080" (2.03mm) 0.0022 cc
0.090" (2.29mm) 0.0031 cc
0.100" (2.54mm) 0.0043 cc
Viscosity Chart
Material Viscosity
(Centipoise)
Water 1
Milk 3
Castor Oil 1000
Maple Syrup 5000
Honey 10000
Chocolate Syrup 25000
Ketchup 50000
Sour Cream 100000
Peanut Butter 250000
Shortening 1200000
Basic Dispensing Guidelines
• Small Shot Size = small dispensing tip,
low fluid pressure, short dispense time
• Large Shot Size = larger dispensing
tip, higher fluid pressure, longer dis-
pense time
• Low Viscosity Fluid = small dis-
pensing tip, low pressure, time
as required
• High Viscosity Fluid = larger dis-
pensing tip (tapered dispensing tip
recommended), high pressure, time
as required
• Positionsyringebarrelat45°angle
• Positionthedispensingtipclosetothe
work surface then activate the dispense
cycle and keep the syringe barrel in the
same position until the cycle is completed
• Ifvacuum“suck-back”isneeded,useonly
enough vacuum to draw back fluid into
the dispense tip. Excessive vacuum could
draw air into the fluid and also could draw
fluid into the dispenser.
Factors Affecting Dispensing
• Pressure: Increas-
ing fluid pressure will
increase dot size and
vice versa
• Time: Increasing
dispense time will
increase dot size
and vice versa
• Dispensing Tip Size:
Larger inside diameter
(orifice) needle results
in bigger dot size
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Valve Diagrams
Various Valve Diagrams
TS5620
Diaphragm Valve
TS941
High Pressure Spool Valve
TS5322
Mini Spool Valve
TS8100
PC Pump
TS5540
Spray Valve
TS7000-DCX
IMP Rotary Valve
TS5000DMP-DCX
Rotary Valve
TS5440
Microshot Needle Valve
TS5420
Needle Valve
Corporate Headquarters (United States)
OK International/ Techcon Headquarters
10800 Valley View Street
Cypress, CA 90630
Tel: 1-714-230-2398
Fax: 1-714-230-2393
Email: oemorders@okinternational.com
European Corporate Ofce
OK International/ Techcon
Eagle Close, Chandler's Ford
Hampshire, SO53 4NF, United Kingdom
Tel: English +44 2380 489 100
Tel: Français: +33 176 710 403
Tel: Deutsch: +49 (0)3222 109 1900
Email: Europe-Orders@okinternational.com
China Corporate Ofce
OK International/ Techcon
4th floor East, The Electronic Building
Yanxiang Industrial Zone
High Tech Road, Guangming New District
Shenzhen, P.R.C
Tel: +86-755-2327 6366
Fax: +86-755-2329 5492
Email: china@okinternational.com
www.techcon.com
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