Fine International offers a full range of preheaters based on different technologies and dependent on specific application requirements.  The unit’s main purpose is to preheat conductors or optical fibers just prior to applying the molten plastic improving the insulated wire/fiber’s properties.

 

Preheaters can be broadly grouped as either contact or non-contact types referring to whether the heating element is contacted by guide wheels, sheaves, etc. during the process.  Non-contact units can be heated through open flame, hot air or inductive heating.  Contact units are heated through inductive technology.

 

Non electrical conductive elements (yarns, optical fibers, etc.) are heated most commonly by radiant heating systems housed in clam-shell structures with closed loop temperature control.  Simple open flame preheaters can be used on smaller conductors and generally lower line speeds.  Similarly although less efficient hot air units can be used as an option to open flame.  All 3 technologies can be integrated with safety features that remove the heat source during process upsets or low line speed operation.  These units are custom designed based on specific applications and Fine International will offer specialized preheaters meeting customer’s requirements.

 

Non-contact and contact inductive preheaters are most commonly offered for the broadest range of wire heating.  Additional information on these units are found in the following links.