Hot Runner & Control Systems

Straight-Shot Hot Sprue Bushings

80

High-Performance Series Straight-Shot ™

“E” Type (Extended Tip Configuration) • Replaces conventional cold sprue bushings to reduce cycle time and save material costs • Efficiently processes commodity or engineering grade resins • High-watt density heater with distributed wattage to help prevent tip freeze-offs • .062 or .125 DIA. Tips with 0.49 Land area for machining of molded part details • Seven shoulder lengths from 7 ⁄8 to 3 7 ⁄8 • 500 and .750 Spherical radius for machine nozzle Always machine runner or part contour to the .277 maximum depth at centerline of gate. However, do not weaken the bushing face by exceeding this maximum dimension (Figures 1 and 2). Always machine part contour to the .277 maximum depth at edge of retainer, with 15° maximum angle. Machine a 3° minimum taper to the gate diameter. This will result in a small sprue on the part being molded (Figure 3). Machine a 3° minimum taper to the gate for a reverse taper sprue on the part being molded (Figure 4). Retainer material is H-13 steel 46-52 HRC.

High-Performance Straight-Shot Bushings are available as E-type

.277 MAX. DEPTH

FIG. 1

NOTE: The expansion factor must be taken into consideration prior to machining for and installation of the bushing. This factor (BE) must then be added to the A dimension. The 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 opera­ EXAMPLE: Given a setpoint of 500°F: BE = 1.375 × .0000063 × (500 – 68) = .004 thus 1.375 + .004 = 1.379. Please note that the above information is given as an example. Variations may occur based on mold configuration and cooling factor. In some instances, it may be necessary to obtain an empirical factor. tion). If mold temperature is different, substitute 68ºF with actual mold temperature.

.277 MAX. DEPTH

R.750 R.500 .17

E-TYPE (EXTENDED TIP CONFIGURATION)

FIG. 2

15° MAX.

.277 MAX. FIG. 3

MAX.

.312 DIA.

5.28 (E-TYPE)

GATE 3° MIN.

.015 RELIEF .62

CUSTOMER MAY ALTER (.500 MAX.) TO ACCOMMODATE NON-STANDARD "A" LENGTHS

.277 MAX. DEPTH FIG. 4

.490

7 TO 3

A = 8 7

8

"0" DIA. 1.000 DIA.

GATE 3° MIN.

1.995 DIA. +.000 – .005

BUSHING ASSEMBLY

REPLACEMENT PARTS

BUSHING ASSEMBLY ITEM NUMBER HPS0607E2 HPS0613E2 HPS0617E2 HPS0623E2 HPS0627E2 HPS0633E2 HPS0637E2 HPS1207E2 HPS1213E2 HPS1217E2 HPS1223E2 HPS1227E2 HPS1233E2

SHOULDER BUSHING ITEM NUMBER

TIP ITEM NUMBER

RETAINER ITEM NUMBER

BODY ITEM NUMBER

SPACER ITEM NUMBER

HEATER ITEM NUMBER

THERMOCOUPLE ITEM NUMBER

SHOULDER LENGTH A

O DIA.

HPS2007 HPS2013 HPS2017 HPS2023 HPS2027 HPS2033 HPS2037 HPS2007 HPS2013 HPS2017 HPS2023 HPS2027 HPS2033

7 ⁄ 8

1 3 ⁄ 8 1 7 ⁄ 8 2 3 ⁄ 8 2 7 ⁄ 8 3 3 ⁄ 8 3 7 ⁄ 8

.062

HPT0001

HPT0602

HPS0001

HPT1001

HPS2001

HPS3001

7 ⁄ 8

1 3 ⁄ 8 1 7 ⁄ 8 2 3 ⁄ 8 2 7 ⁄ 8 3 3 ⁄ 8 3 7 ⁄ 8

HPT0002

HPT1202

HPS0001

HPT1001

HPS2001

HPS3001

.125

U.S. 800-626-6653 n Canada 800-387-6600 n dme.net n store.dme.net HPS2037 NOTE: High-Performance Series Straight-Shot Hot Sprue Bushings heater has voltage of 240 VAC, 700 watts. Thermocouple is “J” type. HPS1237E2

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