The main focus was set on the introduction of Helilubricators for cold and fine wire.
Helilubricators for cold, fine and ultra-fine wires can be placed right before the take-up as well as be used for vertical wire run. Also, we introduced the budget-priced melt felt technique combined with an infrared pre-heater.
Presentation „Magnet Wire Lubrication
In this paper, the HELILUB® technique for solvent-free lubrication of magnet wire is described in detail and compared to other techniques, including operating expenses. It shows that Helilub is technologically and economically superior to other techniques (e.g. using rollers or melt felt technique).
This article is available on request and can also be found on the pages 195 to 201 of the 1997 Proceedings of the conference.
The main topic of the conjoint booth of Schramm Coatings GmbH and Boockmann GmbH was teh presentation of a completely enclosed impregnation plant with inside manipulators, and post combustion and energy recovery integrated in the process.
Freely programmable manipulators decouple the process steps, so that several batches of ballasts and small transformers of 1 to 30 kg of weight taking different hardening times can be processed in one oven at the same time.
Verfahren und Vorrichtung zum Gleitfähigmachen eines Drahtes“ (Solvent-free lubrication of magnet wire)
HELILUB® technique uses a tension and speed controlled string – which has previously been impregnated with a melting, solvent-free lubricant – wrapped around a wire. It gives a multiple 360° contact under controlled friction with constantly renewed string, and guarantees reliable surface preparation. Controlled friction and speed difference of string and wire as well as the precisely calibrated amount of lubricant on the string determine the amount of lubricant applied to the wire and permit prediction of parameters and calculation of results.
This technology has been approved for round wires of 0.012 to 5 mm in diameter.
“Method and an apparatus for impregnating or coating object”
“The method according to the invention for impregnating and/or coating objects in a drip-, and/or dipping roller installation by passing the objects through a preheating zone, at least one drip-, dipping roller- and or coating zone, an after baking zone, and possibly at least one intermediate baking zone is characterised in that the outgoing air from the drip-, dipping roller-, intermediate baking- and/or after baking zone ist passed as crude gas to a post-combustion installation, wherein the crude gas is heated by indirect heat exchange with the clean post-combustion gas, that the clean post-combustion gas is returned at least partly to the preheating zone, and that the energy content of the clean gas which is returned to the preheating zone is adjusted in such a way that the energy requirement of the preheating zone is basically just met.”
in issue 2/1991 of the German trade journal „Drahtwelt“
Winding wires have to be surface treated to provide good and easy processing in the following production steps. Up to now, solvents had to be used to dilute paraffin and other kinds of wax and apply them onto the wire. Now a technique has been discovered that allows melting said lubricants and polishing them onto the wire surface.
In the issue 6/1991 of the german trade journal “farbe + lack”, the implementation of an economic, energy saving impregnation plant with a thermal post-burning unit is described and a performance balance is given. This article is available on request.
When electric coils (transformers, ballasts, motors) are impregnated with unsaturated polyester resins, styrene is emitted. in common impregnating plants, high air flow rates needed for waste air treatment cause high energy consumption. Using teh EEC-technique, flow rates are reduced, controlled and re-circulated. This allows a self-preserving, energy saving thermal post-combustion, which adapts itself to the incurrend emission. The surplus of energy set free when burning the used solvent is re-circulated into the process.