The most common and popular variety is nicrome or nickel chrome, a type of cable used in heating elements such as toasters and stoves. As with other electric heating elements, the number of strokes per inch around the core determines the density of watts. The current flowing through the cable heats it, heating the pattern heater pod. These factors should be taken into account when selecting a pattern for a specific application. A common practice is the use of stainless steel cartridge sheds for temperatures up to 1000 ° F and Incoloy sheds for temperatures up to 1400 ° F. Another design consideration regarding operating temperature is the electrical completion of a cartridge.
The NPH split pod pattern heater is specially designed for industrial stage, mold or mold heating applications where holes are poorly drilled or worn over age. The independent expansion of each part of the heater in the divided sheath pattern when energy is inserted ensures intimate contact with the hole wall. Custom square cartridge heaters can be manufactured to customer specifications or designed to meet specific special application requirements. Custom square patterns often consist of standard units with relatively small design changes, but may contain a variety of the special features below. Cartridge heaters are cylindrical electric heating elements installed in confined spaces in applications that require a high concentration of heat. Protected with a stainless steel sheath, the watt density can reach up to 320 watts per square.
Regardless of the use or type of cartridge heaters, the main components are the same, but change and change to meet the heat and size requirements. An important factor that pattern heating engineers are more aware of is the water density, namely the speed of heat transfer over the heating surface. The advantages of cartridge heaters for the extrusion process include fast heating and a very long service life. As with all cartridge heaters, they must be adapted to individual applications in the extrusion process and can be inserted into the mold to maintain a constant temperature. Square cartridge heaters have a square or rectangular shape instead of the round diameter configuration.
The extra 3 “cable past the braid is standard. If necessary, specify a longer cable. A cartridge heater is an industrial tubular heating element Mica Band Heaters that can be inserted into perforated holes. Pattern heaters provide local and accurate heating and are often used in the heating industry.
Straight armored cable – The armored cable on the fiber optic cable comes directly from the cartridge heating hood for sturdy lead protection. 3 “leading past the armor is standard. If necessary, specify a longer cable. Specify galvanized or stainless steel armor when ordering. OMEGALUX ™ CIR series high density cartridge heaters are particularly suitable for use in mold, die, plate, hob and sealing operations. Thermocouple cartridge heaters heat the surface directly and use complex formulas to determine strength, density and fit. The internal thermocouple is the temperature of the pod, which makes it useful where the space is limited.
The potential of an AC power source, which can be 2 phases or 3 phases, flows through the rolled up Nichrome cable and heats the cable, which in turn heats the cartridge heater. It is also important to take into account the electrical connection of a pattern with regard to the operating temperature. To enable the expansion process, the ceramic core is removed from the stove and replaced with tight magnesium oxide placed around the stove coil.
For a projected heating area given on a plate surface, a well-mounted square cartridge can supply up to 25 percent more power than a round cartridge. Right angle braid cladding: Stainless steel braid on fiberglass insulated lead cables comes perpendicular from the cartridge heating jacket. 3 “lead past braid is standard. If necessary, specify a longer cable. When ordering, specify the total length of the stove. The stainless steel braid glass fiber insulated cables comes directly from the cartridge heating hood for wear resistance, but is flexible enough to bend sharply.
Lead insulation is well embedded in the lid to eliminate any chance of uncovering the bare wire by bending the wires sharply at the front. Lead cable insulation is UL-valued for a continuous operating temperature of 842 ° F / 450 ° C The standard Nextermal tolerance of 0.002 ″ is conveniently comparable to other cartridge heaters. If heat transfer is critical to your application, Nexthermal offers milling tolerances without a premium center that is ± 0.0008 ″.