The plastic is heated in the cylinder while the plastic passes through the screw during processing. Ceramic insulated belt heaters can meet the requirements for energy saving and operational efficiency. They are able to produce higher temperatures, which are essential for processing current resins. MPI Morheat is a manufacturer of mica tape and mica nozzle heaters used to heat around a pipe or nozzle.
When a “soft start” function is available and selected, the heating bands heat up slowly. The temperature of the rear area is controlled by a series of heating tapes (usually 3 to 6 bands). It is located directly below the dining throat and consists of the last third of the total length of the boiler. Then the central zone should be the average of 538°F and 460°F or 500°F. To save costs, insulating jackets can be placed around the injection container. Ceramic ankle belt heaters are used for applications that require higher temperatures than those of mica tape heating.
Cartridge heaters are usually designed to be inserted into a vat or side wall of a container. Unlike cartridge heaters, they generally use a flange, shop, and couplings to connect and seal the thermocouple to the container. They are often used to heat gases or liquids instead of cylindrical components. Coated belt heaters can be made in one or more parts and equipped with a thermocouple attached to the clamping plate. Waterproof and robust, these belt heaters are particularly suitable for adverse conditions (vibrations, humidity, water droplets, etc.) up to a maximum heating temperature of 450°C.
Aluma-Flex ensures exceptional temperature uniformity and long service life thanks to its robust construction and heat transfer capability. It’s helpful to start with your application and temperature requirements. Each belt heater has its own unique characteristics, but you need to know the acceptable levels of each function before making your selection.
The wattage density, which is referred to as Watt/in2 of the heating surface, is an important consideration in the design of heating systems. Wattage does not describe the overall power of the system, but the extent to which the power is concentrated on the surface of the heater. For example, a 1000 watt system with a heater with a surface area of 100 in2 has a wattage of 10 watts / in2. A 1000 watt system with a heater with a surface of 50 inches2 has a wattage of 20 watts / 2 inches. Both systems have the same power, but their wattage densities are very different. This is particularly important with regard to material compatibility.
Ceramic belt heaters are able to operate at temperatures up to 1400°F with ceramic fiber insulation, which provides excellent thermal efficiency. Extruded aluminum strips are equipped with tubular heating elements that run in a precise grove in a segment of extruded Industrial Band Heater Manufacturer aluminum. With a rated temperature of 600oF and watt densities of 35 to 40 W/in2, these heaters are durable and can withstand contaminants from plastic, oil and other materials. One limitation is the bandwidths, which are limited to 0.75, 1.5, 2.5, 3 and 4 inches.