Hot Runner Coil Heaters / Hot Sprue Heaters
Standard Coil Heaters (Spring Type)
High-Density Coil Heaters - Higher watt density
- Faster heating, compact size
Micro / Mini Coil Heaters - Very small diameter
- Designed for tight nozzle spaces
Square / Rectangular Coil Heaters - Non-round cross section
- Better surface contact
- More uniform heat distribution
Coil Heaters with Built-in Thermocouple - Integrated temperature sensor
- Accurate control
- Reduces overheating risk
- Saves you from “why is this melting wrong?” moments
External Hot Sprue Heaters - Mounted outside the sprue bushing
- Easy to install and replace
- Common in standard molds
Internal (Embedded) Sprue Heaters - Built inside sprue bush
- Better heat efficiency
- Used in high-precision molds
Band-Type Sprue Heaters - Similar to nozzle band heaters
- Wrap-around design
- Simple and cost-effective
Coil-Type Sprue Heaters - Coil heater integrated with sprue
- Uniform heating
- High-performance applications
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Key Differences (So you don’t mix them up in a meeting)
- Coil Heaters → wrap around nozzle, flexible, high precision
- Sprue Heaters → focus on sprue bush, can be internal or external
- Tight space → Micro coil heater
- High performance → High-density coil
- Precision control → With thermocouple
- Standard mold → External sprue heater
- Advanced mold → Internal sprue heater
