Hot Runner & Control Systems

67

D-MAX Hot Sprue Bushings High Performance Hot Sprue Bushing 625 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, shear 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 3.543in “A” dimension, with a set point of 500ºF and mold temperature 68ºF: BE = 3.543 x 0.00000633 x (500 - 68) = .010 Thus “A” + BE will be 3.553 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.

Ø 2.756 0.000 +0.001

Ø 4.000 LOCATING RING BORE

HEAD BORE

Ø 2.125 HEATER BORE

Ø 8.00 DWL (OPTIONAL FOR ANTI-ROTATION)

BUSHING HEATER CABLE EXIT

Ø 2.756 0.000 +0.001

Ø 4.000 LOCATING RING BORE

HEAD BORE

0.75

1.174

Ø 2.125 HEATER BORE

Ø 8.00 DWL (OPTIONAL FOR ANTI-ROTATION)

BUSHING HEATER CABLE EXIT

(4) 5/16-18 UNC

0.75

3.50

1.174 1.378

1.174

(4) 5/16-18 UNC Ø 8 X18LG DWL (OPTIONAL FOR ANTI-ROTATION)

NOTE: MATCH MACHINE NOZZLE TIP ORIFICE

R 0.750

4 5 6

INSULATION SHEET (OPTIONAL)

3.50

1.174 1.378

Ø 0.625

Ø 8 X18LG DWL (OPTIONAL FOR ANTI-ROTATION)

NOTE: MATCH MACHINE NOZZLE TIP ORIFICE

R 0.750

4 5 6

INSULATION SHEET (OPTIONAL)

2

Ø 0.625

R0.030

2.125 MIN.

MIN. WIRE CHANNEL

“O” DIA.

“S” DIA.

3

2

FILLED RESIN

UNFILLED RESIN

A + BE

1

R0.030

0.080 Min.

1.0005

0.100 Min.

2.125 MIN.

MIN. WIRE CHANNEL

1"-16 UN TORQUE TO 30 FT/LBS

0.31 MIN.

WATER LINES

3

A + BE

1

High Performance Bushing -625 Series

1"-16 UN TORQUE TO 30 FT/LBS BUSHING AND COMPONENT SPECIFICATIONS

0.31 MIN.

WATER LINES

ASSEMBLY COMPONENTS

“A” DIMENSION

ASSEMBLY

BUSHING BODY DETAIL #1

BUSHING HEAD DETAIL #2

CAST-IN HEATER DETAIL #3

HEAD HEATER DETAIL #4

THERMOCOUPLE DETAIL #5

WATTAGE

WATTAGE

DMAX16090 3.543in (90.00mm)

DEP16090

DBP16001

CIH0104-S

847

RDP38021 500

DTC62501

* Locating rings must be ordered separately.

POINT GATE (BODILESS) 625 SERIES POINT GATE (BODILESS) MACHINING DIMENSIONS Ø2.125 MIN 80° 625 SERIES POINT GATE (BODILESS) MACHINING DIMENSIONS

Ø2.125 MIN

Ø2.125 MIN

Ø2.125 MIN

EXTENDED SPRUE RUNNER DESIGN

STD. SPRUE AND POINT GATE (FULL BODY)

EXTENDED SPRUE AND ANGLE DESIGN 30°

30°

30°

30°

R0.010-0.015 R0.125

Ø 2.125 MIN 80°

Ø2.125 MIN

Ø2.125 MIN

Ø2.125 MIN

25° MAX.

CUSTOMER RADIUS TO SUIT

+.0005 -.0000

+.0005 -.0000

+.0005 -.0000

ØS

ØS

30°

30°

R0.312

ØS

30°

30°

ØO

R0.010-0.015 R0.125

25° MAX.

CUSTOMER RADIUS TO SUIT

Ø0.6250 0.0000 +0.0005

+.0005 -.0000

+.0005 -.0000

+.0005 -.0000

ØS

ØS

R0.312

ØS

ØO

Ø 0.6250 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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