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  #1  
Old 12-21-2016, 03:41 PM
Hammer Hammer is offline
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Default molding question

tips on how to create this type of molding.
I have to make them slightly wider than the original

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Old 12-21-2016, 05:12 PM
Peter Tommasini Peter Tommasini is offline
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Looks like a Pulmax job
Peter
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Old 12-21-2016, 08:09 PM
Overkill Overkill is offline
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Default Another idea

I've seen some high end builds use brass bar and then grind and form it to shape. I think they used studs to attach it. After it was built to size, it was chromed.
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Old 12-21-2016, 10:15 PM
gashammer gashammer is offline
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Somewhere I've seen someone make a couple of steel dies to draw the material through with a come-along. Cut your material. Start the shape and pull it through with lots of lube.

Disclaimer: Never done it.
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Old 12-22-2016, 06:32 AM
Hammer Hammer is offline
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Quote:
Originally Posted by Peter Tommasini View Post
Looks like a Pulmax job
Peter
Hello Peter
how are you?
the PULMAX I have not'm building Hand
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Old 12-22-2016, 08:39 AM
Mike Rouse Mike Rouse is offline
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Just an idea; how about a takeoff on the brass idea and use aluminum flat bar and a router to shape the profile. Next sand and polish.

I think the pulling through dies is the way to make molding that looks original.
I think Cass shows how he does it in his book.
A consideration to be aware of is that the molding will rest upon a curved surface not a flat surface. So the cross sectional profile should look like an inverted U. That way the edges of the trim will rest on two lines Therefore staying in contact with the curved surface.
Mike.

Last edited by Mike Rouse; 12-22-2016 at 09:28 AM.
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Old 12-22-2016, 09:30 AM
Ron Naida Ron Naida is offline
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Quote:
Originally Posted by Mike Rouse View Post
Just an idea; how about a takeoff on the brass idea and use aluminum flat bar and a router to shape the profile. Next sand and polish.

I think the pulling through dies is the way to make molding that looks original.
I think Cass shows how he does it in his book.

Mike.
8242T41

I needed some 1/2" wide half rd trim so I used the above aluminum material from McMaster Carr. The number above is for 1/2 wide but they stock up to 1". My 1/2 was about $3.50 for a 3 ft length.

On other occasions I used solid half rd brass and the client had it chromed.

Ron
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Old 12-22-2016, 09:37 AM
Ron Naida Ron Naida is offline
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Extrude-a -trim in Ontario.

I got a quote from them for some 1" wide half oval aluminum trim x 12 ft long.

They have other sizes.
My client is not ready to start the job so I have not ordered.
It was for vertical trim on a car hauler.
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Old 12-22-2016, 11:19 AM
crystallographic crystallographic is offline
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Standard stuff.

From solid stock -

I have cast these and then shaped to fit, added the studs, dressed off and went to nickel or to chrome.

I have carved them from bar stock by curving the blank to the body, adding the studs, and then working in the lines with a couple of air sanders, then to whatever plating.

I have made drawings and sent the bar stock to a horizontal mill guy and had them whittled out that way, then curved to the body, added studs, and then to whatever plate.

Drawing dies are okay for forming sheet stock - but start with a simple form, first.

If it is a simple oval section, then the boat guys have aluminum pre-drilled trim for sale - and you weld and dress the holes, contour to the body, add the studs, find a good plater and have then chromed.

If your craftsmanship is good there is no appearance difference between solid stock and hollow. A tap with the fingernail will indicate, though.

The difficult ones to fab are the cast ones with the compound tapered slots, plated and then with a brass machined and polished insert shoved in from the ends .... Touring Carrozzeria style.
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Old 12-22-2016, 11:38 AM
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Kerry Pinkerton Kerry Pinkerton is offline
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Kent and others, when you say 'added the studs', can you elaborate? I've been thinking on this for some years as I'm going to have some trim on my roadster. I've been thinking about doing it out of solid aluminum 1/4 to 3/8 thick and contouring on a router (shaper) with a carbide bit. How to affix to the body has been my quantry.

Secondly, what kind of trim finish would have been appropriate for a coach built car from the late 30's early 40's other than chrome?
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