Barrel Heaters - Hasmak.com.tr

Hot RunnerNozzle <strong>Heaters</strong>FIREROD CartridgeMade-to-OrderOptionsInternal ConstructionDia.6.4 mm (0.25 in.)No-HeatHeatedLength6.4 mm (0.25 in.)No-HeatDistributed WattageDistributed wattage varies the wattdensity along the length of theheater. This construction techniqueis used to <strong>com</strong>pensate for heatlosses along the edges of heatedparts. This is ideal for seal barapplications.Individually Controlled Heat ZonesIndividually controlled heat zonesgive the flexibility of controllingtemperature by zones, along thelength of the FIREROD. This is anadvantage for heating requirementsof certain applications, like sealingTo order, specify distributedwattage and give the length andwattage for each section.bars. This internal construction canbe ordered on 16, 19 and 25 mm(0.625, 0.75 and 1 in.) diameterFIRERODs. To order, specifyindividually controlled heat zonesas well as wattage and length perzone.Bend Radius6.4 mm (0.25 in.)Heated25 mm(1 in.)6.4 mm (0.25 in.)Bent FIRERODFIREROD Minimum Required BendDiameter No-Heat Length Radiusin. mm (in.) mm (in.)1⁄4 56 (2 1 ⁄4) 13 ( 1 ⁄2)3⁄8 60 (2 3 ⁄8) 13 ( 1 ⁄2)1⁄2 72 (2 7 ⁄8) 19 ( 3 ⁄4)5⁄8 83 (3 5 ⁄16) 25 (1)3⁄4 98 (3 13 ⁄16) 32 (1 1 ⁄4)In applications where the leads mustexit at an angle, a bend can bemade in the unheated section only.Heated sections may be on eitherside of the bend. It is re<strong>com</strong>mendedthat the heater be bent at the Watlowfactory.A 304 stainless steel sheath is usedon bent FIRERODs. If the sheathtemperature exceeds 540°C(1000°F), consult your Watlow salesengineer or authorized distributor.See dimensions noted on the chart,or contact the Watlow factory inSt. Louis, Missouri, if you need toexceed limitations shown.Centerless GrindingFIRERODDiameterinchesActualPrecision Diameterinches1⁄4 0.241 ± 0.00053⁄8 0.363 ± 0.00051⁄2 0.488 ± 0.00055⁄8 0.613 ± 0.00053⁄4 0.738 ± 0.00051 0.984 ± 0.0005Centerless grinding can be used tofurnish precision diameters, thuspermitting closer heater-to-part fit.Therefore, higher watt densities canbe used.For centerless ground heaters, theheater must either have Teflon ®leads and seal (maximum 305 mm(12 in.) lead length) or have crimpedon leads. Longer lead lengths areavailable, but require externalconnection. The length of aFIREROD available for centerlessgrinding is dependent on theconstruction, please consult factoryfor assistance. To order, specifycenterless grinding.88