equipment sourcebook - Loctite.ph

Meter Mix Dispensing Systems
Pump Selector Guides
Fixed Ratio Systems for Meter Mix 1000, 2000 and 3000 Dispense Systems
All Loctite® brand MMD machines include two (2) standard pump sizes: 8, 10, 15, 20 and 25 mm.
CHART 1 - Fixed Ratio Pump Diameter Configuration and Corresponding Mix Ratio
HIGH VOLUME PUMP (mm) 8.000 9.500 10.000 11.000 12.000 13.000 14.000 15.000 20.000 25.000
LOW VOLUME PUMP (mm) Output CCs 1.277 1.800 1.995 2.414 2.873 3.371 3.910 4.489 7.980 12.468
8.000 1.277 1.00 1.41 1.56 1.89 2.25 2.64 3.06 3.52 6.25 9.77
9.500 1.800 1.00 1.11 1.34 1.60 1.87 2.17 2.49 4.43 6.93
10.000 1.995 1.00 1.21 1.44 1.69 1.96 2.25 4.00 6.25
11.000 2.414 1.00 1.19 1.40 1.62 1.86 3.31 5.17
12.000 2.873 1.00 1.17 1.36 1.56 2.78 4.34
13.000 3.371 1.00 1.16 1.33 2.37 3.70
14.000 3.910 1.00 1.15 2.04 3.19
15.000 4.489 1.00 1.78 2.78
20.000 7.980 1.00 1.56
25.000 12.468 1.00
Pump sizes = WHITE; Maximum output per single pump = BLUE; Volumetric mix ratio (high volume component/low volume component) = BLACK
DISPENSING Two-Part Volumetric
Dispensing
Meter Mix Systems
SELECTION PROCESS
1. Determine the adhesive shot volume required per part in cubic centimeters (cc’s; same as ml’s), from production requirements.
2. From adhesive technical data sheet, determine the adhesive volumetric mix ratio
(high volume component/low volume component).
3. Review the blue maximum outputs for a volume which is 50% to 90% of the maximum output volume of the combined pump
size configuration. Be sure to combine a high volume and low volume pump for the corresponding maximum output volume of
the combined pumps, see example 1.
a. If the adhesive shot volume required is greater than that of the maximum possible output of the configurations, divide the required shot
volume by the smallest number which makes the required shot volume less than the maximum possible output for that configuration.
Then repeat step 4. The divisor is the number of cycles the machine must perform to meet the required shot volume, see example 2.
b. Compare the maximum output volume of the combined pump configuration to the white mix ratio for that combination of pump
sizes. If the corresponding mix ratio does not exactly match that of the adhesive, review the chart for other alternatives, or specify
one pump from the chart, along with a Custom pump size, which will yield the exact pump configuration required for the adhesives
mix ratio, see example 2 and see custom pump volume calculation example below**.
EXAMPLE #1 FIXED RATIO –
STANDARD PUMP SIZES APPLY
High volume = 1 Low volume = 1
Mix ratio = 1/1 = 1
Per part shot size = 6 cc (6 ml)
High volume pump = 15 mm Low volume pump = 15 mm
Volumetric mix ratio = 1/1
Maximum pump combination output = 8.978 cc
(6 cc / 8.978 cc) x 100% = 67% - ‡ o.k.
Recommended pump configuration = 15 mm/15 mm
15 mm pumps are standard sizes; therefore no custom pump fee is required.
** CUSTOM PUMP VOLUME CALCULATION – π x (Cylinder Radius) 2
EXAMPLE #2 FIXED RATIO –
1 CUSTOM PUMP SIZE AND 2 CYCLES REQUIRED FOR REQUIRED SHOT SIZE
High volume = 2 Low volume = 1 Mix ratio = 2/1 = 2
Per part shot size = 22.5 cc (22.5 ml)
Maximum output volume of 2:1 combination ~ 18.7 cc with a
25 mm/17.675 mm pump configuration
Per part shot size divided by 2 = 11.25 cc (11.25 ml)
High volume pump = 25 mm Low volume pump = 17.675 mm
Volumetric mix ratio = 2/1
Maximum pump combination output = 18.7 cc
(11.25 cc/18.7 cc) x 100% = 60% - ‡ o.k.
Two (2) shots per part are needed to obtain 22.5 cc per part shot size requirement.
Recommended pump configuration = 25 mm / 17.675 mm
25 mm pump is standard; 17.675 mm pump is special.
One custom pump sizing fee applies.
TO CALCULATE PUMP VOLUMES FOR CUSTOM PUMP SIZES – USE THE FOLLOWING EXAMPLE (Note: All pump lengths are 2.54 cm)
Volume of cylinder = (π x (Cylinder Radius) 2 x Cylinder Length) *(NOTE: Need to convert pump diameter to radius and pump size from mm to cm)
*For a 16 mm diameter cylinder: Cylinder Radius = 16 mm /2 = 8 mm or 0.80 cm; Cylinder Length = 2.54 cm; π = 3.14159
Volume of 16 mm Pump = (3.14159) x (0.80 cm) 2 x 2.54 cm = 5.107 cc
For additional information and the full line of equipment, visit www.equipment.loctite.com.
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