DME Company High-Performance ER Long Series Straight-Shot Sprue Bushing SSBT-4517E-2

The D-M-E standard ER-Series Straight-Shot Hot Sprue Bushings (Long and Short Styles), like the standard E-Series, are supplied with a .25 inch extra stock allowance on the front face to permit machining of runner profiles or part contours into that face. These bushings feature a “reverse taper” design that originates from under the heat source, providing easier start-ups. The ER-Series design can also be used when a reverse taper will benefit a particular application. These bushings are supplied
with a .12 diameter orifice and a .50 long reverse taper. The orifice may be enlarged and the taper increased to suit.

D-M-E developed Straight-Shot Hot Sprue Bushings to eliminate sprues, permit larger shots and faster fills, and greatly extend heater life. The bushings feature an unrestricted “straightshot” channel to feed the part or runner.

Material in the channel is heated by a special helical tubular heater which surrounds the melt stream. This heater distributes heat uniformly throughout the bushing and is virtually impervious to moisture, gases and plastics contamination. The helical tubular heater (120 or 240 volt) is thermocouple equipped so temperature can be closely controlled using a D-M-E single-zone Closed Loop Temperature Controller.

E-Series Straight-Shot Hot Sprue Bushings (Long and Short Styles) provide a .25 inch extra stock allowance on the front face to permit machining of runner profiles or part contours into that face. They are supplied with a .06 diameter gate and a .25 inch gate land. The gate diameter can be enlarged to suit the particular molding application.