Page 67 - Hot Runner & Control Systems 2020

D-MAX Hot Sprue Bushings 65

High Performance Hot Sprue Bushing 250 Series

NOTE: Dimensions shown in inches unless specified otherwise. For selection of gate diameter it is important to take into
consideration the material flow characteristics, share
Ø4.000 LOCATING RING BORE Ø2.165 HEAD HEATER BORE rate of resin, molding conditions, fill time requirements,
Ø4.000 LOCATING RING BORE Ø2.165 HEAD HEATER BORE
gate vestige, wall thickness and configuration of parts to
R0.24 R0.24 be molded. Situations requiring high injection velocities
High injection rates may require larger gates due to shear
1.57 1.57 CENTRAL CENTRAL R0.38 0.33 must be considered when selecting small gate diameters.
R0.38
0.75 0.75 0.33 heat build up (e.g. high weight thin wall applications). See
material manufacturer’s literature for further information
regarding material to be molded.
To compensate for nozzle’s growth when heat is applied, the
1.656 3.50 0.33 linear expansion of the nozzle (BE) at a given temperature
must be added to the nominal “A” dimension. The formula
below shows how to figure boring depth (dimension “A” +
1.656 1.50 0.33 BE). The tip of the nozzle will now be flush with the cavity
3.50
line at processing temperature.
+0.001
Ø1.575 0.000 Head Bore 0.49 Formula for determining this expansion factor is as follows:
(2) 5/16-18 UNC Tap
+0.001 BE = “A” dimension x 0.00000633 x nozzle set point - 68ºF
0.717
1.50 0.000
(assuming the mold is at 68ºF during operation). If mold
+0.001 0.49 temperature is different, substitute 68ºF with actual mold
Ø1.575 0.000 Head Bore (2) 5/16-18 UNC Tap temperature.
NOTE: +0.001 R0.50
MATCH MACHINE Ø0.31 0.000 EXAMPLE: Given a 4.134 inch “A” dimension, with a set point
0.717
5 NOZZLE TIP ORIFICE R0.75 of 500ºF:
INSULATION SHEET
(OPTIONAL) BE = 4.134 x 0.00000633 x (500 - 68) = 0.011
3 Thus “A” + BE will be 4.145
NOTE: R0.50
MATCH MACHINE Ø0.31 NOTE: The above information is only given as an example;
NOZZLE TIP ORIFICE R0.75 variations may occur based on mold configurations and
5 4 +0.001 0.000 INSULATION SHEET
cooling factor. In some instances, it may be necessary to
1.299 (OPTIONAL)
obtain an empirical factor.
3 R0.016 MAX Min. - .55 Max. “O” DIA.
0.16 Ø1.187 Min. - 0.12 0.22 FILLED RESIN “S” DIA.
Ø1.250 Max. 0.000 UNFILLED RESIN
4 2 .50 MIN A + BE +0.001 *0.3750
1 1.299 0.028 Min. 0.062 Min. 0.5005
WATER LINES 0.31 MIN 1/2-24 UN R0.016 MAX Min. - .55 Max. 0.7505
TORQUE TO 30 FT/LBS 1.0005 D-MAX Hot Sprue Bushings | D-MAX High Performance Series 250
0.16 Ø1.187 Min. - 0.12 * Point Gate (Full Body) only.
0.22
Ø1.250 Max.
.50 MIN
2 BUSHING AND COMPONENT SPECIFICATIONS
A + BE
1 ASSEMBLY COMPONENTS
“A”
ASSEMBLY DIMENSION BUSHING BODY HIGH PERFORMANCE WATTAGE HEAD HEATER WATTAGE THERMOCOUPLE * Locating
1/2-24 UN
WATER LINES 0.31 MIN DETAIL #1 HEATER DETAIL #2 DETAIL #3 DETAIL #4
DMAX06055 2.165in (55.00mm) DEP06055 TORQUE TO 30 FT/LBS 440 rings must
CIH0081S
DMAX06067 Ø1.187 MIN DEP06067 CIH0082S 350 be ordered
2.657in (67.50mm)
DMAX06080 80° DEP06080 MIN CIH0083S Ø1.187 MIN 400 Ø1.187 MIN separately.
3.150in (80.00mm)
Ø1.187
DMAX06092 3.642in (92.50mm) DEP06092 CIH0084S 565 RDP38021 500 DTC38001
30°
30°
30°
DMAX06105 4.134in (105.00mm) 30° DEP06105 CIH0085S 500
DEP06130
DMAX06130 5.118in (130.00mm) +0.0005 CIH0086S 500 25° MAX
R0.010-0.015
CUSTOMER
DEP06155
R0.125
DMAX06155 6.102in (155.00mm) ØS 0.0000 CIH0087S 550 MIN. MIN.
RADIUS TO
ØO 0.100 0.180 MIN. SUIT
+0.0005
+0.0005 AT TANG. +0.0005 ØS 0.0000
Ø0.3750 0.0000 LAND MAX 0.080 ØS 0.0000 0.080 0.080
POINT GATE STD. SPRUE AND EXTENDED SPRUE AND EXTENDED SPRUE AND
(BODILESS) 0.020 0.005 POINT GATE EXTENDED POINT GATE EXTENDED POINT GATE
(FULL BODY) (FULL BODY) RUNNER DESIGN (FULL BODY) ANGLE DESIGN
Ø1.187 MIN
80° Ø1.187 MIN Ø1.187 MIN Ø1.187 MIN
30°
30° 30° 30°
R0.010-0.015 +0.0005 25° MAX
R0.125 ØS 0.0000 CUSTOMER MIN. MIN.
ØO 0.100 0.180 MIN. RADIUS TO
SUIT
+0.0005 AT TANG. +0.0005 +0.0005
Ø0.3750 0.0000 LAND MAX 0.080 ØS 0.0000 0.080 ØS 0.0000 0.080
0.005 0.020
U.S. 800-626-6653 n Canada 800-387-6600 n dme@milacron.com n www.milacron.com