Heated Sprue Bushings

  • H13, Full Hard Tool Steel
  • Integral 240V Heater and Type J Thermocouple
  • .500” and .750” Radius Standard Head Options
  • Standard Sprue or .500” Extra Machinable Stock
  • .750”, 1.000”, and 1.500” Diameter
  • Insulating Washer Options Available
Standard Sprue Gate
Extra Stock Sprue Gate

Heated Sprue Bushing Head Options

Heated Sprue Bushing Head Options

Why Choose an Integrally Heated Sprue Bushing?

Integrally heated sprue bushings have a superior heat transfer and can process a wide range of resins. The streamlined flow channel terminates in a reverse taper gate, providing minimum pressure loss and allowing for rapid gate freeze. The formation of a small gate stub on the part or runner results in a machine hold-time reduction, with no increase in sink marks on the part. There is a replaceable type-J thermocouple located close to the flow channel. They are available in either a standard .500” or .750” radius head or custom as requested. Gate options include a standard sprue for non-machined applications, extra stock for machining applications or a euro style extra stock with a reduced gate diameter for use in restricted areas and less heat loss. 

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