Seiki Spear Probe
The patented Spear System is a two stage probe consisting of a body heating element and a separate tip heating element. Various types of spear probes are available for a wide variety of molding applications.
The Principle of the TIP HEATER
An internal body heater maintains the melt temperature of resin around the probe. A separate tip heater turns “ON” to melt the gate open. Cooling holes near the gate areas always keep both the cavity and gate areas evenly cooled. When the tip heater turns “OFF”, the gate area is cooled down by heat transfer, and the resin in the gate area is rapidly solidified, sealing the gate.