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Re: Quandry

To: MG List <>
Subject: Re: Quandry
From: Max Heim <>
Date: Fri, 13 Sep 2002 13:40:56 -0700
on 9/13/02 12:27 PM, at wrote:

> In a message dated 9/13/02 2:43:25 PM Eastern Daylight Time,
> writes:
>> That's $50 for a 1-inch piece of plastic. Of course the cost goes down as
>> the quantity goes up (in this case the total universe of applicable
>> vehicles
>> was only about 20,000), but how many MGA grilles does Moss sell in a year?
>> The total possible market is 100,000, divided by the two grill types, minus
>> attrition (probably 25% at least), and minus good existing grilles, and
>> owners who don't care about a few flaws, or can't afford it at whatever
>> price it winds up. The main thing is, tooling for a large, complex metal
>> item is going to be a lot more, possibly by a factor of ten.
> - - - - - - - - - - - -
> I knew there was a trick to it!
> It seems to me that they can make castings in sand.  They make an accurate
> piece, embed it in tightly packed sand, remove it, and pour in the liquid
> metal.  When it cools, voila!  Just paint it with chrome paint, available at
> all auto supply stores!
> I guess it isn't that easy, ...

That's an understatement...<g>... for instance, how do you "remove" the
complex 3-dimensional object from the tightly packed sand without disturbing
it? I know what you're thinking of, but you seem to be a little vague on the
process. Anyway, grille shells aren't cast, at least not for our cars. And
have you ever seen "chrome" paint? Not exactly chrome...

>...but didn't they used to make arrowheads that way?

Who? Native Americans used obsidian, typically. Medieval Europeans would
have forged them, I would think. Cast arrowheads seem unlikely, but...?
> Maybe I should bring this up on the shoptalk list.
> Allen Hefner
> SCCA Philly Region Rally Steward
> '77 Midget
> '75 Midget "The Project"
> '92 Mitsubishi Expo LRV Sport


Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires

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