Spruce Bushings
The Integrally Heated Sprue Bushing is uniquely designed for high performance and reliability for Manifold and Direct Feed Applications, even with the most demanding molding cycles and plastic resins. The advanced heat transfer capability is attributed to its integrally heated design, resulting in a more uniform heat profile. A replaceable thermocouple is strategically located close to the melt flow channel for optimization of processing conditions with all thermoplastics.
Features and Benefits
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– Graduated Watt Density – High Refractory Insulation – Streamlined Flow Channel – Fully Sealed Construction – Made of High Grade Alloy Steel – Replaceable Thermocouple |
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Gating Options
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Sprue Gate – Suitable for most applications, the Sprue gate is provided as standard on the Heated Sprue Bushing. Please note that this style gate is not intended for machining. The press fit areas are held to +/- .0005″. |
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Extra Stock Sprue Gate – The Extra Stock Sprue gate is available for applications requiring machining of the gate area for runner profiles, part contours, or adjustment of the bushing height. The .750″ diameter and 1.00″ diameter bushings have .500″ of extra stock, while the 1.500″ diameter bushing has .750″ of extra stock. The press fit areas are held to +/- .0005″. |
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Eurostyle Sprue Gate – Originally designed for the European market, the Eurostyle Sprue Gate is similar to the extra stock gate except that it also has a reduced gate diameter to allow gating in more restricted areas. This design also minimizes heat loss at the press fit area. The press fit areas are held to +/- .0005″. |
Head Options
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.500″ Radius – Provided with a 0.500″ radius to mate in 0.500″ radius machine nozzles. Reinforced contact area for improved strength and heat transfer. |
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.750″ Radius – Provided with a 0.750″ radius to mate in 0.750″ radius machine nozzles. Reinforced contact area for improved strength and heat transfer. |
