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D-MAX Hot Sprue Bushings
High Performance Hot Sprue Bushing 250 Series
For selection of gate diameter it is important to take into consideration the material flow characteristics, share rate of resin, molding conditions, fill time requirements, gate vestige, wall thickness and configuration of parts to be molded. Situations requiring high injection velocities must be considered when selecting small gate diameters. High injection rates may require larger gates due to shear 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 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” + BE). The tip of the nozzle will now be flush with the cavity line at processing temperature. Formula for determining this expansion factor is as follows: BE = “A” dimension x 0.00000633 x nozzle set point - 68ºF (assuming the mold is at 68ºF during operation). If mold temperature is different, substitute 68ºF with actual mold temperature. EXAMPLE: Given a 4.134 inch “A” dimension, with a set point of 500ºF: BE = 4.134 x 0.00000633 x (500 - 68) = 0.011 Thus “A” + BE will be 4.145 NOTE: The above information is only given as an example; variations may occur based on mold configurations and cooling factor. In some instances, it may be necessary to obtain an empirical factor.
NOTE: Dimensions shown in inches unless specified otherwise.
Ø 4.000 LOCATING RING BORE
Ø2.165 HEAD HEATER BORE
R0.24
Ø4.000 LOCATING RING BORE
Ø2.165 HEAD HEATER BORE
R0.38
R0.24
R0.38
3.50
1.50
0.49
+ 0.001 0.000 Head Bore
Ø1.575
(2) 5/16-18 UNC Tap
3.50
+0.001 0.000
0.717
1.50
NOTE: MATCH MACHINE NOZZLE TIP ORIFICE
R0.50 R0.75
0.49
+0.001 0.000 Head Bore
Ø0.31
Ø1.575
(2) 5/16-18 UNC Tap
5
+0.001 0.000
INSULATION SHEET (OPTIONAL)
0.717
3
NOTE: MATCH MACHINE NOZZLE TIP ORIFICE
4
R0.50 R0.75
Ø0.31
5
INSULATION SHEET (OPTIONAL)
R0.016 MAX
“O” DIA.
“S” DIA.
3
Ø1.187 Min. - Ø1.250 Max.
FILLED RESIN
UNFILLED RESIN
*0.3750 0.5005 0.7505 1.0005
1 2
A + BE
0.028 Min.
0.062 Min.
4
0.31 MIN
1/2-24 UN TORQUE TO 30 FT/LBS
WATER LINES
* Point Gate (Full Body) only.
High Performance Hot Sprue Bushing - 250 Series
R0.016 MAX
Ø1.187 Min. - Ø1.250 Max.
BUSHING AND COMPONENT SPECIFICATIONS
ASSEMBLY COMPONENTS
1 2
A + BE
“A” DIMENSION
ASSEMBLY
BUSHING BODY DETAIL #1
HIGH PERFORMANCE HEATER DETAIL #2 WATTAGE
HEAD HEATER DETAIL #3 WATTAGE
THERMOCOUPLE DETAIL #4
* Locating rings must be ordered separately.
DMAX06055 DMAX06067 DMAX06080 DMAX06092
2.165in (55.00mm) 2.657in (67.50mm) 3.150in (80.00mm) 3.642in (92.50mm)
DEP06055 DEP06067 DEP06080 DEP06092 DEP06105 DEP06130 DEP06155
CIH0081S
440 350 400 565 500 500 550
0.31 MIN
1/2-24 UN TORQUE TO 30 FT/LBS CIH0082S CIH0083S
WATER LINES
DTC38001 or DTC38002* (High-Heat)
Ø1.187 MIN 80°
Ø1.187 MIN
Ø1.187MIN
Ø1.187 MIN
RDP38021 30°
500
CIH0084S CIH0085S CIH0086S CIH0087S CUSTOMER RADIUS TO SUIT 30°
30°
30°
DMAX06105 4.134in (105.00mm) DMAX06130 5.118in (130.00mm) DMAX06155 6.102in (155.00mm) R0.125 R0.010- .0 5
25° MAX
Ø S 0.0000 +0.0005
Ø O Ø0.3750 0.0000 +0.0005
Ø S 0.0000 +0.0005 * NOTE: FOR HIGH-HEAT APPLICATIONS (>625F) PLEASE CONTACT DME APPLICATION ENGINEERING FOR DESIGN ASSISTANCE- appl_eng@dme.net
Ø S 0.0000 +0.0005
STD. SPRUE AND POINT GATE (FULL BODY)
EXTENDED SPRUE AND EXTENDED POINT GATE (FULL BODY) RUNNER DESIGN
EXTENDED SPRUE AND EXTENDED POINT GATE (FULL BODY) ANGLE DESIGN
POINT GATE (BODILESS)
Ø1.187 MIN 80°
Ø1.187 MIN
Ø1.187MIN
Ø1.187 MIN
30°
30°
30°
30°
R0.010-0.015
25° MAX
Ø S 0.0000 +0.0005
CUSTOMER RADIUS TO SUIT
R0.125
Ø O Ø0.3750 0.0000 +0.0005
Ø S 0.0000 +0.0005
Ø S 0.0000 +0.0005
U.S. 800-626-6653 n Canada 800-387-6600 n dme.net n store.dme.net
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