Keeping PR Out of tube while casting

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ctubbs

ctubbs

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Joined
Sep 12, 2010
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Murray, Kentucky
I have been watching and reading for a bit. When casting PR around a tube in CPVC, how do you keep the PR from geting inside the tube. Also how do you keep the tube centered in the middle of the CPVC pipe? I know someone has solved this problem and most likely posted the remedy. I just haven't found it yet, so any help or direction would be greatly appreciated. I think I am ready to jump into something even worse than pen turning.:biggrin::biggrin::)
Thank you for your help.
Charles
 
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Charles,

I think the preferred method is to use some of the resin saver molds. They are made to accept tubes for embedding. I have never used them, but i have turned a blank or two that came from a resin saver mold and they are nice!

That being said, I am a poor boy and cannot afford the resin savers. so i have developed my own way. I use a pen blank. A resin blank to be exact. I turn a tenon on the blank to fir snugly inside the tube, and the rest of the "plug" is ever so slightly smaller than the mold (in your case, the ID of the Cpvc)Slide the plug in the tube, and put that all in the mold. Put the top plug in, but make it a bit smaller in overall diameter so you can pour resin around it.


Now that i have said all of that, I will suggest a silicone mold of some sort. Even if it is a homemade mold. With a horizontal mold, you can work air off the tube and otherwise make sure everything is good to go. With the pipe, it is a set and forget type situation.


Hope that helps!
 
Cheap corks. Put them in the ends of the tube, put a bit of thin CA at the joint to seal them. Cast. Cut. Drill. They will easily hold up to 50# pressure without leaking.

Do a search here. In the past someone posted a link to a really cheap source but I can't find it at the moment.
 
Small corks and I hot glue thin pieces of broom handle to the cork which keeps it from touching the bottom of my molds. Fill tube with BB's then put the other cork tightly in other end.
 
gketell said:
Cheap corks. Put them in the ends of the tube, put a bit of thin CA at the joint to seal them. Cast. Cut. Drill. They will easily hold up to 50# pressure without leaking.

Do a search here. In the past someone posted a link to a really cheap source but I can't find it at the moment.
Click to expand...

www.widgetco.com has corks of all sizes. If you need an inexpensive mold, PM me. I have some I can make that are tube in casting molds.
 
Cork one end, fill with Play-Do and cork other end! Glue spacers to corks for centering. I don't use PVC molds but this method works for the silicone open top molds. It should work for PVC also.
 
I've pondering this for some time and I think I have come up with something I will try. I was thinking of using corks as has been mentioned then running toothpicks thru them to keep it center while in the cpvc pipe. Just a thought and I might try next week.
 
Could always cut a dowel rod off and fit in there that closely matches the diameter of the tube.

+1 ResinSaverMolds
 
In don't see using plastic pipe as a mold to be an advantage. PVC molds seem to be way to cumbersome to be fun. Open top square molds are easy to make using HDPE cutting boards as outlined by Curtis. Molds can be made using silicone caulking as outlined by Serge in an article in the library. Silicone rubber open top molds are made and sold by several members. The resin saver molds are available. All of these choices offer simple ways to cast both solid blanks and blanks with tubes. Casting and making blanks is more fun than trying to figure out how to do the same using PVC pipe as molds.
Do a good turn daily!
Don

ctubbs said:
I have been watching and reading for a bit. When casting PR around a tube in CPVC, how do you keep the PR from geting inside the tube. Also how do you keep the tube centered in the middle of the CPVC pipe? I know someone has solved this problem and most likely posted the remedy. I just haven't found it yet, so any help or direction would be greatly appreciated. I think I am ready to jump into something even worse than pen turning.:biggrin::biggrin::)
Thank you for your help.
Charles
Click to expand...
 
I bought about 2,000 small wing nuts at one of those traveling tool shows a few years back. The whole box of nuts was $6. I didn't really need them, but it was the only bargain I found at the show.

Those small wing nuts fit very nicely inside my horizontal mold. I use small corks glued into the tubes filled with plumbers putty. I position the wing nuts so that the tubes are centered mold. The nuts press into the corks very nicely.

Only about 1,000 wing nuts left until I have used the whole bunch for casting.
 
Everyone, thanks for all the attention and good advice you have offered. I've said it before and I must once again say that this is the most friendly and sharing place I have ever been. Thank you, each and every one. Ah heck. there I go sounding like Tiny Tim, the character in the story not the 'singer'.
Charles
 
I use those rubber plugs that car manufacturers use to fill holes in the body work. They are cheap, come in many sizes, and they all have a ridge around the outside that holds the tube off the bottom of the mold by just enough that the casting material is thick enough.
 
Charles if your looking for a inexpensive molds that saves resins try
thepenwizard.com
I been using them a great value for your buck.
I have Gatsby/Monet/Wall Street Cigar mold Euro pen mold
Remember saves resin, no drilling, easy to wash out,
Tell Joe Swall Louie56 refer you + you get discount by mentioning IAP member
 
Source for the corks is LOWES they have them HD does not. get size 000 for 7mm tubes and #1 for sierra size tubes. I have used these and glue in tube with a ring of CA and fill tube w/BB's then cork theopposite end. Glue a stand off block to each cork and cast horizonally, Then cut, pick cork, empty BB'S clean tube with small knife and turn.
 
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