Page 68 - Hot Runner & Control Systems 2020

66 D-MAX Hot Sprue Bushings

High Performance Hot Sprue Bushing 375 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 Ø2.913 HEAD HEATER BORE
Ø4.000 LOCATING RING BORE Ø2.913 HEAD HEATER BORE rate of resin, molding conditions, fill time requirements,
1.77 1.77 gate vestige, wall thickness and configuration of parts to
be molded. Situations requiring high injection velocities
R0.25
CENTRAL R0.38 R0.25 must be considered when selecting small gate diameters.
1.57 CENTRAL R0.38 0.37 High injection rates may require larger gates due to shear
0.37
0.75 1.57 heat build up (e.g. high weight thin wall applications). See
material manufacturer’s literature for further information
0.75 regarding material to be molded.
To compensate for nozzle’s growth when heat is applied, the
0.37 1.656 linear expansion of the nozzle (BE) at a given temperature
must be added to the nominal “A” dimension. The formula
0.37 below shows how to figure boring depth (dimension “A” +
1.656
BE). The tip of the nozzle will now be flush with the cavity
3.50 line at processing temperature.
+0.001 0.71
Head Bore Ø2.008 0.000 (2) 5/16-18 UNC Tap Formula for determining this expansion factor is as follows:
3.50
+0.004 BE = “A” dimension x 0.00000633 x nozzle set point - 68ºF
0.933 0.000 (assuming the mold is at 68ºF during operation). If mold
+0.001 0.71 temperature is different, substitute 68ºF with actual mold
Head Bore Ø2.008 0.000 (2) 5/16-18 UNC Tap
NOTE:
D-MAX Hot Sprue Bushings | D-MAX High Performance Series 375
MATCH MACHINE Ø0.47 R0.50 temperature.
NOZZLE TIP ORIFICE 0.933 +0.004
0.000 R0.75
INSULATION SHEET EXAMPLE: Given a 2.362 inch “A” dimension, with a set point
5 (OPTIONAL) of 500ºF:
NOTE: BE = 2.362 x 0.00000633 x (500 - 68) = 0.0064
3 MATCH MACHINE Ø0.47 R0.50 Thus “A” + BE will be 2.368
NOZZLE TIP ORIFICE R0.75
NOTE: The above information is only given as an example;
4 +0.001 0.000 INSULATION SHEET
variations may occur based on mold configurations and
5 1.299 (OPTIONAL)
cooling factor. In some instances, it may be necessary to
R0.016 MAX Min. - .55 Max. obtain an empirical factor.
3
0.16 Ø1.437 Min. - 0.12 0.22 “O” DIA. “S” DIA.
Ø1.625 Max.
+0.001
0.000
4 2 0.50 MIN A + BE UNFILLED RESIN FILLED RESIN 0.5005
1.299
1 0.028 Min. 0.062 Min. 0.7505
R0.016 MAX Min. - .55 Max. 1.0005
WATER LINES 0.31 MIN 5/8-20 UN
TORQUE TO 30 FT/LBS
0.16 Ø1.437 Min. - 0.12 0.22
Ø1.625 Max.
0.50 MIN
2 BUSHING AND COMPONENT SPECIFICATIONS
A + BE
1 ASSEMBLY “A” ASSEMBLY COMPONENTS
DIMENSION BUSHING BODY HIGH PERFORMANCE WATTAGE HEAD HEATER WATTAGE THERMOCOUPLE
5/8-20 UN
WATER LINES 0.31 MIN DETAIL #1 HEATER DETAIL #2 DETAIL #3 DETAIL #4 * Locating
DMAX10060 2.362in (60.00mm) DEP10060 CIH0088S 400
TORQUE TO 30 FT/LBS
DMAX10072 2.854in (72.50mm) DEP10072 CIH0089S 450 rings must
DMAX10085 3.346in (85.00mm) DEP10085 CIH0090S 550 be ordered
DMAX10097 Ø1.437 MIN DEP10097 CIH0091S Ø1.437 MIN 700 Ø1.437 MIN separately.
3.839in (97.50mm)
Ø1.437 MIN
DMAX10110 80° 4.331in (110.00mm) DEP10110 CIH0092S 800 RDP50021 750 DTC38001
30°
DMAX10135 5.315in (135.00mm) 30° DEP10135 CIH0093S 900
30°
30°
DEP10160
DMAX10160 6.299in (160.00mm) +0.0005 CIH0094S 1000 25° MAX
R0.010-0.015
CUSTOMER
DEP10185
DMAX10185 7.283in (185.00mm) ØS 0.0000 MIN. CIH0095S 1100 MIN. MIN.
R0.187
ØO AT TANG. 0.100 0.180 RADIUS TO
SUIT
+0.0005 LAND MAX 0.080 +0.0005 0.080 ØS +0.0005 0.080
0.0000
Ø0.5000 0.0000 ØS 0.0000
POINT GATE STD. SPRUE AND EXTENDED SPRUE AND EXTENDED SPRUE AND
0.020
0.005
(BODILESS) POINT GATE EXTENDED POINT GATE EXTENDED POINT GATE
(FULL BODY) (FULL BODY) RUNNER DESIGN (FULL BODY) ANGLE DESIGN
Ø1.437 MIN
80° Ø1.437 MIN Ø1.437 MIN Ø1.437 MIN
30°
30° 30° 30°
R0.010-0.015 +0.0005 25° MAX
R0.187 ØS 0.0000 MIN. CUSTOMER MIN. MIN.
ØO AT TANG. 0.100 0.180 RADIUS TO
SUIT
+0.0005 LAND MAX 0.080 +0.0005 0.080 ØS +0.0005 0.080
0.0000
Ø0.5000 0.0000 ØS 0.0000
0.005 0.020
U.S. 800-626-6653 n Canada 800-387-6600 n dme@milacron.com n www.milacron.com