On Mon, 11/23/15, Sky Rocket Guy
skyrocketguy@yahoo.com [B9Builders] wrote:
Subject: Re: [B9Builders] need to bend some "plastic"
To: "
B9Builders@yahoogroups.com"
Date: Monday, November 23, 2015, 12:55 PM
I
took a plastics shop in high school.
We
didn't heat the entire piece of plastic for a
bend.
They had
a special heater for bends like that. It was two flat,
rectangular metal pieces that were side by side. There was
a heating element in the gap.
So, you
placed your plastic on top of the heating element where you
wanted the bend.
http://www.bbc.co.uk/staticarchive/ef1f748f310a104985ceb7ee7b5c8dbca7d0646c.gif
It was a
bit of an art form as too much heat and it would melt the
plastic to the point it would drip.
You bend
the piece away from the heated side.
Here's
an instructable of how someone ripped apart a toaster oven
for the heating element to bend plastic.
http://www.instructables.com/id/Poor-man-s-200-dollar-plastic-heat-strip-for-penni/
Jeff
Lake
From: "toblueiis
toblueiis@yahoo.com [B9Builders]"
To:
B9Builders@yahoogroups.com
Sent: Sunday, November
22, 2015 1:42 PM
Subject: [B9Builders]
need to bend some "plastic"
Hello,
I have a B9 project that involves heating and bending some
"plastic". It is actually cut from a "poly
cutting board", your basic cutting board for the
kitchen. There is no indication of what type of plastic it
is on the labels or stamped in the plastic.
Does anyone have some experience with working with this type
of plastic, as to what temperature and time limits work well
for bending it. I was planning on using a small toaster
oven with a temperature control. My pieces will be
relatively small, about 3 inches long and 1.75 inches wide.
Because of the groove already on the edge, I will use this
edge to try to bend a 90 degree angle. I thought that the
groove, being on the inside of the bend, will help make a
neater bend. By the way, it is about 3/8 inch thick.
If I had to guess, I would think that this plastic is a
polypropylene, but I am not sure.
thanks,
David M.
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