Barrel Heaters - Hasmak.com.tr

W A T L O W<strong>Heaters</strong>Case HistoriesCable Heater Makes TamperProof Packaging PossibleProblem:An equipment manufacturerproduced and applied tamperresistantseals to various containers,bottles and plastic cups.Inserting a cartridge heater into adrilled hole failed to produce aneven temperature around the sealinghead's circumference. A tubularheater was also considered, butdropped when the watt densityexceeded the re<strong>com</strong>mendedmaximum.Solution:The problem was solved with aWatlow cable heater. A 1.6 mm(0.062 in.) diameter cable, 130 cm(50 in.) long was wound to a 4.7 mm(0.187 in.) inside diameter by 100mm (4 in.) long coil. This coil wasfitted into a round sealing head witha slot milled along the circumference.Installing the heater in this fashionmade a ring-shaped sealing headpossible. This configurationdrastically reduced the sealinghead's mass and provided rapidheat-up and recovery times. Teflon®leads and seals protected the heateragainst moisture from the frequentwashdowns.Cast-In Aluminum AssemblyReduces Downtime ForFood ProcessorProblem:A food processing <strong>com</strong>pany utilizeda cable heater held in a stainlesssteel milled groove to seal the lids ofyogurt containers. The assembly didnot meet the desired specificationsfor thermal performance, wasunreliable and caused significantdowntime.The heaters began to fail within oneto four weeks because they couldnot withstand the regular equipmentwashdowns required for theapplication. The customer also hadto stock large inventories ofreplacement <strong>com</strong>ponents (cableheaters and many stainless steelparts). This situation forced them tosearch for an alternative solution.Solution:Watlow provided a cast-in aluminumheater to fit into a redesignedassembly. The required part had tobe small- 101 mm (4 in.), whichlimited the heater design options.Watlow delivered the necessarywattage with a short length, parallelcoil cable heater.The heater replaced severalstainless steel <strong>com</strong>ponents, thuslowering the part count. The efficientheat transfer of the cast aluminumassembly improved the thermalperformance to the desiredcustomer specifications. Downtimeand change out times were alsoreduced when the customer addeda quick disconnect plug.The benefits realized by the newWatlow design were reducedinventory levels, a more reliableprocess and less downtime. Themore efficient cast-in heater reducedwattage by about 50 percent and stillproduced reliable seals between thelid and container.Packaging<strong>Heaters</strong>Teflon® is a registered trademark of E.I. DuPont de Nemours & Company.383