The Murphy Builders Site

Hey Gang,

The following came up on another group I watch. It had to do with
cutting/machining/milling plastics and fibreglass. Then this fellow
mentioned that a safe way was with water-jet (like a laser, but uses
particulated water at 60,000 + PSI). Then he mentions a "prop". Just
an interesting idea.

Brian Lawson,
Windsor, Ontario.


The following:

I used to cut insulating material for plastic injection molds. We
used carbide end mills and hss drills. About two years ago I cut
three propeller blades for an ultra lite with a two flute carbide end
mill. In all cases I used a mask and a vacuum. The best way to cut
fiberglass that I have seen is a water jet machine. It leaves perfect
clean edges with no dust and can cut very intricate designs. The only
problem is it can't cut a blind hole.

Neal





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Brian

What is the list this came up on?

Dave R.

Brian Lawson wrote:

Hey Gang,

The following came up on another group I watch. It had to do with
cutting/machining/milling plastics and fibreglass. Then this fellow
mentioned that a safe way was with water-jet (like a laser, but uses
particulated water at 60,000 + PSI). Then he mentions a "prop". Just
an interesting idea.

Brian Lawson,
Windsor, Ontario.

The following:

I used to cut insulating material for plastic injection molds. We
used carbide end mills and hss drills. About two years ago I cut
three propeller blades for an ultra lite with a two flute carbide end
mill. In all cases I used a mask and a vacuum. The best way to cut
fiberglass that I have seen is a water jet machine. It leaves perfect
clean edges with no dust and can cut very intricate designs. The only
problem is it can't cut a blind hole.

Neal

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Hey Dave,

It came from a newsgroup, rec.crafts.metalworking
It was not anything I cared much about, so I discarded the maybe 20
previous items about it. I only snapped up this item because he
mentioned making a propeller. In reading it again, I realize he was
stating that he made a prop by milling, and that the part about
water-jet was probably about doing something flat and thin, unlike a
prop. I've not heard of a 3-D waterjet. Lots of CNC 2-1/2, but the Z
is for material height I suspect.

Was your interest in the prop, as mine was, or in the water-jet
cutting?

The North American Model Engineering show (NAMES) is on next week-end,
April 27 & 28, 2002, at the Southgate Civic Center, Southgate,
Michigan. Want to see scale and operating versions of Rolls-Royce
engines, or 9 cylinder radials, or aero rotary engines? Do you like
steam, or clocks, or machines, or........? Drop by. Or if you're
flying, use Grosse Ile Airport which is less than 10 miles south.

Anybody interested, contact me if you are considering either, and I'll
send more information and details.

Have a good one.

Brian Lawson,
Windsor, Ontario.
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
On Sun, 21 Apr 2002 23:52:21 -0300, you wrote:

Brian

What is the list this came up on?

Dave R.

Brian Lawson wrote:

Hey Gang,

The following came up on another group I watch. It had to do with
cutting/machining/milling plastics and fibreglass. Then this fellow
mentioned that a safe way was with water-jet (like a laser, but uses
particulated water at 60,000 + PSI). Then he mentions a "prop". Just
an interesting idea.

Brian Lawson,
Windsor, Ontario.

The following:

I used to cut insulating material for plastic injection molds. We
used carbide end mills and hss drills. About two years ago I cut
three propeller blades for an ultra lite with a two flute carbide end
mill. In all cases I used a mask and a vacuum. The best way to cut
fiberglass that I have seen is a water jet machine. It leaves perfect
clean edges with no dust and can cut very intricate designs. The only
problem is it can't cut a blind hole.

Neal

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Brian

I was interested because of the metal working aspect. Unfortunately I won't be
able to make the show, too long a hike from Nova Scotia! Sounds interesting
though.

Dave R.


Brian Lawson wrote:

Hey Dave,

It came from a newsgroup, rec.crafts.metalworking
It was not anything I cared much about, so I discarded the maybe 20
previous items about it. I only snapped up this item because he
mentioned making a propeller. In reading it again, I realize he was
stating that he made a prop by milling, and that the part about
water-jet was probably about doing something flat and thin, unlike a
prop. I've not heard of a 3-D waterjet. Lots of CNC 2-1/2, but the Z
is for material height I suspect.

Was your interest in the prop, as mine was, or in the water-jet
cutting?

The North American Model Engineering show (NAMES) is on next week-end,
April 27 & 28, 2002, at the Southgate Civic Center, Southgate,
Michigan. Want to see scale and operating versions of Rolls-Royce
engines, or 9 cylinder radials, or aero rotary engines? Do you like
steam, or clocks, or machines, or........? Drop by. Or if you're
flying, use Grosse Ile Airport which is less than 10 miles south.

Anybody interested, contact me if you are considering either, and I'll
send more information and details.

Have a good one.

Brian Lawson,
Windsor, Ontario.
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
On Sun, 21 Apr 2002 23:52:21 -0300, you wrote:

Brian

What is the list this came up on?

Dave R.

Brian Lawson wrote:

Hey Gang,

The following came up on another group I watch. It had to do with
cutting/machining/milling plastics and fibreglass. Then this fellow
mentioned that a safe way was with water-jet (like a laser, but uses
particulated water at 60,000 + PSI). Then he mentions a "prop". Just
an interesting idea.

Brian Lawson,
Windsor, Ontario.

The following:

I used to cut insulating material for plastic injection molds. We
used carbide end mills and hss drills. About two years ago I cut
three propeller blades for an ultra lite with a two flute carbide end
mill. In all cases I used a mask and a vacuum. The best way to cut
fiberglass that I have seen is a water jet machine. It leaves perfect
clean edges with no dust and can cut very intricate designs. The only
problem is it can't cut a blind hole.

Neal

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--
David A. Ricker P. Eng.
DARTEC Engineering Inc.
3 Tamarac Drive
Fall River, Nova Scotia
Canada, B2T 1E8
ricker@dbis.ns.ca
Ph. 902-860-0256





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