Process for potting components in an impregnating compound
AssigneesVer-Fahrenstechnik Hubers GmbH, Ciba-Geigy Corporation
InventorsJosef Terhardt, Peter Ruger, Dieter Baumann
Life of this patent
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Abstract
Method and apparatus for potting components in an impregnating composition which does not set at room temperature, but which sets at elevated temperatures in a short time. A one-component composition is used. The potting chamber optionally consists of a forechamber, a main chamber and an exit chamber. The potting chamber is followed by a tunnel oven which itself consists of an airlock entry chamber, a main chamber and an airlock exit chamber.
Claims16
Method of potting and subsequent curing of one or a plurality of components with an impregnating composition which does not cure at room temperature, but cures within less than 30 minutes at a temperature above 60.degree. C., comprising the steps of:
- a) Introducing a component or a pallet of a plurality of components into a potting chamber,
- b) Evacuating the potting chamber,
- c) Potting said component or plurality of components in the composition under vacuum,
- d) Venting the potting chamber,
- e) Removing said component or plurality of components and placing them in an airlock forechamber of a curing oven having an airlock forechamber, a main chamber and an airlock exit chamber,
- f) Closing the curing oven airlock forechamber and evacuating it,
- g) Opening said airlock forechamber to the oven main chamber, introducing the component or plurality of components into said main chamber, and then closing said main chamber,
- h) Passing the component or plurality of components through the oven main chamber,
- i) Opening the oven main chamber to the oven airlock exit chamber and passing the component or plurality of components out of the oven main chamber into the oven airlock exit chamber and closing the oven airlock exit chamber,
- j) Venting the oven airlock exit chamber and removing the component or plurality of components from the oven airlock exit chamber.
Apparatus for potting and subsequently curing one or a plurality of components with an impregnating composition, comprising a holding tank for the potting composition, said holding tank having an outlet for said potting composition, a potting chamber, said potting chamber being a single chamber or three chambers separated from each other by dividing walls, said three chambers being a forechamber for entry through an airlock, a main chamber and an airlock exit chamber;
- a tunnel oven and conveyor means for conveying said component or plurality of components out of the potting chamber, into the tunnel oven and through the tunnel oven;
- and means for feeding potting composition from said holding tank into said potting chamber.
Dependencies are inferred from the claim text.