Pressed-in Brass Coil Heater for Precision Hot Runner Molds

Pressed-in Brass Coil Heater is a rigid heating assembly designed for precision hot runner nozzles, optical lens molds and high-volume injection molding applications. The coil is pressed into a close-fitting brass or stainless steel structure to minimize air gaps and provide stable heat transfer.

This design is manufactured according to the required inner diameter, outer diameter, heating length, voltage, wattage and lead wire configuration. Unlike flexible coil heaters, this assembly is produced as a fixed rigid structure and cannot be bent after manufacturing.

This product belongs to the

Coil Heater series
, which includes different heating structures for hot runner systems and precision injection molding applications.

Pressed-in Brass Coil Heater Features

• Rigid close-contact heating assembly
• Minimized air gap between heater and heated component
• Suitable for precision hot runner nozzle applications
• Available with round, square, flat and micro-mini coil structures
• Inner diameter tolerance up to ±0.08 mm
• Maximum working temperature up to 420°C or 500°C depending on structure
• High watt density design up to 10–12 W/cm²
• Standard 350 mm lead length, customized length available
• PTFE high-temperature wire with stainless steel braided sleeve
• K-type and J-type thermocouple options
• Custom voltage, wattage and dimensions available

Pressed-in Brass Coil Heater Specifications

Product Type	Pressed-in Brass Coil Heater / Rigid Coil Heater Assembly
Inner Coil Structure	Round / Square / Flat / Micro-Mini coil configuration
Heating Length	25–200 mm
Wattage	150–1500 W
Voltage	110V / 220V, custom voltage available
Inner Diameter Tolerance	±0.08 mm
Structure Type	Rigid pressed-in assembly, non-bendable
Lead Length	350 mm standard, customized available
Lead Wire	PTFE high-temperature wire with stainless steel braided protection
Maximum Working Temperature	420°C / 500°C depending on configuration
Maximum Watt Density	10–12 W/cm²
Thermocouple	K-type / J-type optional
Customization	Inner diameter, outer diameter, heating length, voltage, wattage and lead length

Two Available Structure Options

• Full Brass Outer Sleeve – Provides excellent thermal conductivity and fast heat transfer for applications requiring high heating efficiency.
• SUS321 Outer Shell with Brass Inner Layer – Combines oxidation resistance with good thermal conductivity for demanding operating environments.

The suitable structure depends on required temperature, heat transfer performance and installation conditions.

Pressed-in Brass Coil Heater Applications

The rigid close-contact design is suitable for applications requiring accurate temperature control, repeatable installation and stable thermal performance.

• Precision hot runner nozzles
• Optical lens injection molds
• Medical plastic injection molds
• High-volume injection molding systems
• Precision mold heating applications
• Hot runner components requiring uniform heating

Why Choose a Pressed-in Coil Heater Assembly?

Compared with flexible coil heaters, the pressed-in structure is manufactured with a fixed inner diameter to achieve closer contact with the heated component. This helps reduce air gaps and improves heat transfer consistency.

The rigid construction is especially suitable for precision hot runner systems, optical molding and medical plastic applications where stable temperature performance is important.

Custom Pressed-in Brass Coil Heater Solutions

EaseWise manufactures custom heating assemblies according to customer drawings, samples and application requirements. Each heater can be configured according to the required dimensions and heating performance.

• Custom inner diameter
• Custom outer diameter
• Custom heating length
• Custom voltage and wattage
• Custom watt density
• Custom lead wire length
• Brass sleeve or SUS321 shell structure
• K-type or J-type thermocouple option
• OEM production according to drawings or samples

For quotation, please provide inner diameter, outer diameter, heating length, voltage, wattage and quantity.

Coil Heater Series

EaseWise provides different coil heater configurations for hot runner systems and precision heating applications. Select the suitable structure according to installation space, flexibility requirements and heat transfer performance.

• 
  Round Coil Heater
  
  – Flexible cylindrical heating solution for hot runner nozzles and compact heating areas.
• 
  Square Coil Heater
  
  – Provides larger contact surface and higher heating performance for continuous production molds.
• 
  Flat Rectangular Coil Heater
  
  – Suitable for narrow installation spaces requiring efficient heat transfer.
• 
  Micro Mini Coil Heater
  
  – Compact heating solution for miniature hot runner systems and limited spaces.
• 
  Hot Runner Spring Coil Heater
  
  – Flexible spring coil heating element with brass sleeve and thermocouple for injection mold nozzles.
• 
  Coil Heater Series Comparison
  
  – Compare different coil heater structures and application advantages.

Request a Pressed-in Brass Coil Heater Quote

Need a standard configuration or a custom rigid heating assembly?
Send us your required inner diameter, outer diameter, heating length, voltage, wattage and quantity.
Our engineering team can recommend a suitable structure for your hot runner application.

Custom pressed-in brass heating assemblies are available for precision hot runner molds and injection molding applications.