Re: need help with rapid tooling

From: Peter Martin (
Date: Wed Jan 06 1999 - 11:50:33 EET

Thanx to all who replied to my queries about RP EDM electrodes. Many of
the suggestions were to use metal spraying on the epoxy/ABS part. I am
now exporing this possibility. Before I start physical trials, I need a
ball park figure for the coating thickness for the electrode to
withstand spark erosion. One try already ended in failure, when the coat
eroded off before the cavity was completed!


Peter Martin
Anna University-FRG Center for CAD/CAM
Chennai, India

>From Sun Jan 3 20:47:25 1999
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>From: "Mr. Tushar R. Mahale" <>
>To: Peter Martin <>
>Subject: Re: need help with rapid tooling
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>Try Epoxy/Spray metal tooling. Let me know if u require any help
>Tushar Mahale
>Senior Research Engineer
>Rapid Prototyping Cell
>Indian Institute of Technology-Bombay
>On Mon, 28 Dec 1998, Peter Martin wrote:
>> dear rp-ml'rs,
>> season's greetings and happy new year to everybody. i'm an
>> engineering student in india and i have a small problem regarding
>> Tolling.
>> i have been asked to standardize a
>> method to produce press tools using RP/RT techniques. so far, the
>> were produce by generative machining of a graphite electrode, which
>> then utilized for EDM machining of the punch and die set.
>> i'm trying to further reduce the lead time by using RP/RT. a
>> FDM 2000 is available to me. what would be the best method of
>> the considerations are tool-life of the electrode,the surface quality
>> the part and obviously the accuracy of the final part.
>> Can anyone suggest any solutions? cost-effective ones would be
>> we are on a most miserly, Scrooge-like budget.
>> Peter Martin
>> Anna University, Chennai
>> South India
>> AU-FRG Center For Cad/Cam
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