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1. APPLICATION

 Dies, Press, Molds, Platens

2. MAX.TEMPERATURE

 870°C

 

 

 

 1. INSTRODUCTONS

 

 Since no single design can provide the best heater for all applications, Hanil electric heat engineering company manufactures cartridge heaters in two basic designs.

 Which of the two designs to use is determined primarily by the required watt density of the heater.

 

 We therefore refer to the two types as either HI-watt LOW-watt,our  trade name for the high density heaters, or standard(low watt density) heaters.

 While we have standard designs for the construction of booth HI-watt  and LOW-watt  cartridge heater, We have always been ready to design heaters for special or unusual  applications.

 

 The illustration below shows only a few of these special designs, which include hollow cartridge heaters,flat heaters with pilot bits and heaters for three phase operation.

 Take advantage of our engineering  and design staff to help solve your specific problem. cartridge heater, in the simplest terms, is a cylindrical, metallic Sheathed device used to produce heat by passing an electric current through a resistance wire inside the sheath

 Though sometimes used to heat fluids or gases, their shape and size makes them particularly suitable for the heating of machine parts such as dies, press, molds,platens and other process machinery.

 

  한일전열엔지니어링/생산품목/카트리지히터[cartridge heater]

 In these applications, the heater is usually inserted into a closely Fitting hole drilled in the part to be heated.

 

 The heater is designed to raise the temperature of the part to a specific point, and to maintain that temperature through the process in which the machine is used. much more is involved in the design and manufacture of cartridge heaters than is indicated in the brief description above.

 

 Construction is influenced by a great many factors such as temperature, wattage and watt density, voltatage and phase, heater accessibIlity and desired operating life, tolerance of fit in the hole in which the heater is inserted,and the space available in the part to be heated.

 

(2). CONSTRUCTIONS

   2-1. RESISTANCE WIRE

 

  Of the many types of resistance wire available,only a few are suitable for used in high watt density heaters, of these few, only the finest is used in the hi-watt.an alloy of 80% nickel and 20% chromium,it provides the best combination of structural strength,low temperature coefficient,high temperature operating characteristics and protective Oxidation properites.

 

  2-2. INSULATOR

 

 The granular size and shape, purity, and final compacted density of the magnesium Oxide used greatly affects heater performance.

  Specially selected for this applications, the material used in the hi-watt provides a unique of all of thease factors which insure the greatest possible structual and dielectric strength while maintaining very low resistance to heat flow.

 

  2-3. SHEATH ELEMENT

 

  While stainless steel, inconel, incoloy an other alloys are used in high watt density cartrdige heaters, Hanil electric heat engineering company Uses only Incoloy in the HI-wat. This alloy alone provides the best combination of phsical strength and resistance to virtually all types ocorrosion. Including heat and chemical corrosion and heat scaling.

  Not only is the finest alloy used,but the well thickness is much heavier than is usually found in heaters of this type.

 

          This heavy wall enables the heater to better withstand the stresses encountered during  many heating and cooling cycles, greatly ncreases the physical and removal,and helps maintain the compacted density of the magnesium oxide and other internal components  for long life and consistent performance.

 

  2-4. INSULATION

 

   Generally,thermal conductivity and dielectric strength are increased with the compaction  of the magnesium oxide:

  however,heater quality is actually reduced if compaction increases to the point at which the magnesium oxide granules are pulverized while being compacted.

 In the hi-watt, all components of the compaction process, ncluding equipment,Technique  and the magnesium oxide itself have been designed to produce the optimum in  compaction  without reaching that point past which Heater life and quality is actually reduced.

  

   2-5. LEAD WIRE

 

   Power is supplied to the hi-watt through flexible nickel-clad copper leads rated for temperatures of 250°C. The leads are firmly attached to large diameter solid terminal pins of nickel alloy which are internally connected to the resistance wire.

 The junction of lead wire and terninal pin is totally enclosed in a fiber glass which provides both excellent electrical insulation and high resistance to abrasion.

 The solid terminal pins are long enough to allow field reconnection to new flexible leads when necessar