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topic 758

Electroforming of dies for molding electronic capacitors


We are currently using machined dies for transfer molding of electronic capacitors. I recently heard these dies could be made by forming a mold of the desired shape and then the die is built up using a electroplating process.

Have you ever heard of a process like this

If so please steer me in the right direction. Thank you

Justin Dameron


Electroformed molds or mold inserts are quite common in the industry. If you are interested in finding out how your dies/molds can be electroformed, e-mail me a sketch of the mold or a DXF file.

Regards, Berl

berl stein
berl sig
"PlaterB" Berl Stein
NiCoForm, Inc.
supporting advertiser
Rochester, New York


December 19, 2008

Hi, Justin. The general name for the process that you are speaking of is "electroforming". what this means is that the same process that is used for electroplating is used, except that the plated layer itself becomes an object, and whatever the plating was plated upon is removed (melted away if it wax, dissolved away in caustic soda if it was aluminum, physically stripped off, possibly for reuse, if it was stainless steel. Depending on the quantity required, additional electroforms can be generated from the first electroform.

To give a more concrete understanding of what we are speaking of, consider the manufacture of vinyl records. A lacquer master is cut, then a nickel electroform is made from it that can be used as a stamper or a number of "negative" electroforms can be made this original nickel electroform, and then dozens of stampers can be electroformed onto these "negatives".

You would be in the best of hands with Berl :-)


Ted Mooney, Teds signature
Ted Mooney, P.E. RET
Pine Beach, New Jersey

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