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– A cartridge heater is a tube-shaped, heavy-duty, industrial joule heating element (electrical resistance) used in the process heating industry, usually custom manufactured to a specific watt density,〔http://www.omega.com/prodinfo/cartridgeheaters.html〕 based on its intended application.〔http://www.process-heating.com/Articles/Feature_Article/154bd7dd2f268010VgnVCM100000f932a8c0____〕 Highly compacted they reach a surface watt density of up to 50 W/cm².〔http://www.freek-heaters.com/products/cartridge_heaters/cartridge_heaters.php〕 Cartridge Heater Applications are as below〔http://www.nexthermal.com/product/cartridge-heaters/high-watt-density-cartridge-heaters.aspx〕 * Seal Bars * Torpedo Heaters for injection molding * Injection molding manifolds * Mass Spectrometry * Rubber molding * Food production * Immersion Tank heating * HVAC Compressors * Fuel Cell * Semiconductor * Medical Devices * Sensor measurement devices * Extrusion * Die Casting * Hot melt adhesives * Heat Staking/ Hole Punch * Plastic welding * Fluid heating Construction The cartridge heater may be divided in 7 main parts: * Heating Coil * Insulation * Sheath * Sealing * Termination * Lead Wire Type * Watt Density ==Heating coil== The heating coil is the actual resistance which is where the electrical load occurs. The most common type of metal alloy used for this purpose is a Nickel-Chromium mixture, also known as Nichrome. the Nichrome wire is wound around a ceramic core, and the number of spirals per inch vary according to the requested watt density. Potential from an alternating current source, which can either be 2 phase or 3 phase, flows through the coiled Nichrome wire, heating up the wire, which in turn, heats the cartridge heater sheath. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「cartridge heater」の詳細全文を読む スポンサード リンク
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