Acrylic, Plastic and Resin Pens - Think the Need for Speed

I never had any real desire to experiment with plastic pens but when your pen supplier screws up your order and you get a dozen or so plastic blanks for free...... (By the way, some of these on line vendors have a very interesting on line ordering flaw).

What is the first thing one should do when dealing with new materials - perform a little preliminary research, read some instructions or dive right in? Dive right in, of course..........it's a guy thing.

This makes sense - marking the blanks.

Plenty of room to work with here.

These bushings are for the 'Saturn Pen', which is exactly the same as the standard 7mm pen except it sports a wider center bushing, allowing for a thicker pen.   This was purchased from Woodturningz as discontinued stock.  The price was  right.

One thing I found out quickly is that the end of the blank breaks out when drilling through.   If you were tight on material, this would be a problem.  There is plenty of material here so this is not a concern.   If it was a concern, a closer examination of the instructions says not to drill all the way through and use a band saw to cut off the end.

This is different from what I am accustomed to seeing.  Plastic coming off the pen mill obscures the end view of the blank.

This is what I mean about not being able to see what you are doing.  Neat picture too.

Plastic it seems to me, would probably be turned about the same speed as wood, or maybe a little slower.  I am opting for 1300 rpm.

These are Acrylester pen blanks called Molten Metal This looks simple and straight forward, right?

Hard plastic chips flying all over the place make safety glasses a must.  It seems to turn easy enough.

Just as everything was going well, I broke out the end. I wasn't using that much pressure but the chips flying off the blank are making this kind of pain in the @$$.

Lets see if we can't try this again.   One advantage with acrylic pen blanks using this kind of design is you don't have to worry about not having a matched pen. It looks all the same.

Several minutes later I am about down to where I started.  Must have been some defective plastic...........

Looking good! Just need to turn the end down flush....

#&#%&@!!.  This has me a little upset.  Time to go in the house an cogitate on this a bit.

After thinking about this for a while, I came to the conclusion that speed is the problem so I opted for 960 rpm.   Let's see how that works.

Chips flying all over the place and the size of those chips seem to be larger and worse but lets go a little further.

The chipping out continues to worsen.  Time for a pause that refreshes.

The chipping thing is giving me pause.  I don't plan on chipping these plastic pen blanks down to size. That's just not cool. Then it dawns on me.  How does plastic, acrylester and other synthetics of this sort react to speed and friction?   It softens. So, how about double the speed to say, 1750 rpm?  Couldn't do any worse except that the blank might really blow up.   Best to ensure the tool is sharp.

Bingo! Not only does the blank turn down rapidly but the chips have gone away, turning into thin plastiky acrylester flakes.   The blank on the right was turned using the slower speeds and chipping is clearly visible.  The blank on the left looks quite clean. What works very well is to rest the bottom of the tool against the blank and lean the tool into the blank.  The tool heats up the acrylic blank a bit and with a little practice, the blank takes on a shine while turning.

The rest of this is going to be a piece of cake.  The first thing to do is use CA glue to fill in the divots.   I started with the thin CA glue but switched over to the thicker stuff to fill in deeper holes. I let it dry naturally.

I started sanding up through the grits starting with about 320 grit and quickly found out that you need to considerably reduce your sanding speed because you can melt the sand paper into the acrylester / plastic.

A close examination found a couple more holes in the plastic pen blank on the right, which was fixed with medium viscosity CA glue.   I then re-sanded and finished the pen off with my custom EEE / CA glue finish.

One time does not a conclusion that means anything make so I decided to try a few more Acrylester and plastic pens, all turned at a high rate of speed.   From the top down: Molten Metal - Acrylester Doodles - Plastic Gold and Black - Acrylester Doodles - Plastic Bananas and Grapes - Acrylester Red Russet - Acrylester Area 51 Plastic

Closing Comments: Sanding: I didn't use Micro mesh on any of these pens save one.   I saw no difference between a EEE / CA glue finish and a Micro mesh finish, other than Micro mesh took longer. Don't forget to turn the speed down or you can end up melting your sand paper into the plastic pen blank. Cracks: Some of those Acrylester pen blanks had longitudinal cracks not visible until after initial turning.   Stop and check for cracks several times whilst turning the blank down to size.   I called the supplier about this and he said this was an occasional problem and he would send replacements.  He did.   The plastic pen blanks had no hidden cracks.   The Acrylester did. I did  try repairing a couple of those cracks but they seemed to chase down to the end, which was an exercise in futility. Turning: Turning downhill works better than the reverse. Speed: Crank it up. These Acrylester pen blanks throw out chips while getting them down to round.   These chips will turn to soft plastic flakes if the turning speed is high enough, and are much more pleasant to work with. Conclusion: An interesting diversion  but I think I prefer the real stuff. But........... a few more like this and I might just change my mind. Here are a couple more: I didn't blow up any blanks with these. A sharp tool, high rates of speed and keeping the tool against the acrylic blank works wonders. No divots at all! 1-4-2011 Wade from Albuquerque, New Mexico was kind enough to send these along: Orange Acrylic White Acrylic Laminate Comment:  Very nice looking pens.  I haven't tried a laminate myself and will have to do that some day. If you would like to see more of Wade's Pens: "I have my pens posted on my facebook page if you want to look at them.  just search Wade McCloskey in Albuquerque and you should be able to find me.  I will attach acouple of pictures of pens I have turned that are on that are there."