Coil Heaters are a kind of electric heaters that provide three-dimensional heating. It can be fitted in the exterior of the tool and heat tools from the outside. These heaters are comparatively smaller than cartridge heaters. They are malleable and can be formed into complex shapes.
In the market, these heater heaters are called cable heaters. Although they are distinct in construction they may be used interchangeably in certain applications. Coil heaters can be an alternative to cable heaters.
What are the Types of Coil Heaters?
Coil heaters are straight or pre-formed electrical heating elements with a metallic sheath. They have a fixed configuration, once they are shaped. They can be round, square, or rectangular cross-sections that are available in various shapes and sizes
There are several types of coil heaters available in the market. Some of the commonly used types are:
- Straight Coil Heaters: The heaters are straight with a defined length and watt density. They are used for heating equipment by snaking them around or through the equipment. They can be personalized by the end user to fit OEM applications.
- Close-Coiled Coil Heaters: The heaters offer optimal heat distribution and may contain distributed wattage to concentrate heat transfer at desired locations.
- Spiral Wound Coil Heaters: Low-profile heaters can generate high temperatures in restricted areas.
- Star Wound Coil Heaters: The heaters consist of offset coils that are inserted into pipes or ducts to create a turbulent flow in air or fluid, enhancing heat transfer.
- Micro Coil Heaters: The heaters are very small-diameter coil heaters ideal for use in micro-molding applications and can heat very small parts precisely.
- Mini Coil Heaters: The heaters have a small diameter and are ideal for use in various small applications such as packaging machinery, labeling equipment, and medical devices.
- Maxi Coil Heaters: The heaters are larger-diameter coil heaters that are suitable for use in applications such as plastic injection molding and die casting.
What are the Factors to Consider While Selecting a Heater?
Coil heaters are very commonly used in different industrial processes. Their unique formability allows for versatile design options. The customers try to enhance tool performance by addressing cooler areas, reducing the mass of the tool to cut costs, improving thermal responsiveness to changes in the process, or minimizing energy consumption.
The service temperature is affected by the material used for the sheath of the heated zone.
The materials used in the lead connection area depend on the operating temperature of the coil heater.
When the coil heaters are used in harsh environments like die casting, it is best to design them into a protective casing that can extend their service life. Industrial Process Heaters Manufacturer gives a broad range of materials and coatings to meet the demands.
The wattage required for the system is determined by several factors. This includes the mass that needs to be heated, the desired Temperature Rise, the time it takes to reach the setpoint, and any heat losses that need to be compensated for. Coil heaters have specific limits on the permitted watt density to ensure they can provide a reliable solution for the application.
The heating element is designed to function with the application’s power supply. It can operate on various voltages because of its resistive element. It can rang