Removing blanks from PVC...

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Florida Marine

Florida Marine

Member
Joined
May 16, 2011
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403
Location
Jennings, FL
I glued caps in the bottoms, made a rack and poured some blanks the night before last.

Now, even after sitting in the sun on the back porch today...they will not come out.

Ideas?
 
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Sean,

You are experiencing the same as I! I could never get PVC to work for me. Some do and some don't!

I even purchased some expensive mold release but something about it just didn't work for me. Then I created a vertical mold to solve that problem...:cool:

Only thing you can do now is turn off the PVC.
 
Try throwing them in the freezer for a while.
If that doesn't work you can still say you made some cool blanks. :biggrin:
 
PTownSubbie said:
Sean,

You are experiencing the same as I! I could never get PVC to work for me. Some do and some don't!

I even purchased some expensive mold release but something about it just didn't work for me. Then I created a vertical mold to solve that problem...:cool:

Only thing you can do now is turn off the PVC.
Click to expand...

Not to mention also helping out a fellow caster who didn't want the hassle of PVC to start with! :tongue:

Sean, the one thing Fred and I discovered when we first started with the vertical molds is that the resin doesn't shrink as much width wise as it does height wise. Turning it off seems to be the easiest way that won't potentially break the blank. Other than that, hitting on a hard surface upside down might get it loose, but would could break it alltogether.
 
Brooks803 said:
PTownSubbie said:
Sean,

You are experiencing the same as I! I could never get PVC to work for me. Some do and some don't!

I even purchased some expensive mold release but something about it just didn't work for me. Then I created a vertical mold to solve that problem...:cool:

Only thing you can do now is turn off the PVC.
Click to expand...

Not to mention also helping out a fellow caster who didn't want the hassle of PVC to start with! :tongue:

Sean, the one thing Fred and I discovered when we first started with the vertical molds is that the resin doesn't shrink as much width wise as it does height wise. Turning it off seems to be the easiest way that won't potentially break the blank. Other than that, hitting on a hard surface upside down might get it loose, but would could break it alltogether.
Click to expand...

lol...so much for my $2.00 in caps!

darn it
 
Raid the kitchen and get some parchment paper. Thats what I use when I use PVC.
Just drop the paper in the mold and pour the PR into the paper.
 
The couple of times I've poured into PVC I had to start the blank out by pressing it with my drill press and a a push rod in the quil. I don't like the PVC mold for just the reason you have discoverd.
I would say cut the caps off and try the press.
 
I sprayed mine with Pam and they came out sweetly, also instead of caps I sealed the end with blue painters tape.
 
I use PVC all the time. Just use blue tape on the bottom no caps. Then I put them in my vise give it a "small" twist of the vise, turn it half way and do it again. You'll hear the PR release from the sides of the PVC and then they just push out. Never been a problem. Someone on IAP told me that trick.
 
i've done the same. put the pipe in a vice horizontally and plane the top with a hand plane till you reach the cast then you can peel the opening just enough to pop it loose. worked like a charm for me
 
Next time, don't glue the endcaps on. Just push them on. If you're worried about the caps staying on or leaking, wrap some tape around the joint.

When the resin has cured, pop the caps off and knock the blanks out with a dowel and mallet. Or, you can cut lengthwise down one side of the pvc pipe. Tape over the cut before casting. When set, remove the endcaps, untape the cut, stick a flathead screwdriver in and twist. That will open up the pipe and the blank will drop right out.

In the meantime, you can cut the existing caps off to get the castings out.

Regards,
Eric
 
Sylvanite said:
Next time, don't glue the endcaps on. Just push them on. If you're worried about the caps staying on or leaking, wrap some tape around the joint.

When the resin has cured, pop the caps off and knock the blanks out with a dowel and mallet. Or, you can cut lengthwise down one side of the pvc pipe. Tape over the cut before casting. When set, remove the endcaps, untape the cut, stick a flathead screwdriver in and twist. That will open up the pipe and the blank will drop right out.

In the meantime, you can cut the existing caps off to get the castings out.

Regards,
Eric
Click to expand...

That is where I am at!
 
never have used caps

I have never used the pvc caps.

I only use cheap blue painters tape. I use 3 pieces and cris cross them over the bottom and add one little strip of green automotive paint tape to secure. Had the same roll of green tape now for about 6 months.

After it is cured I peel the tape off and give the bottom a small tap with a nylon pin head hammer and the blank just rolls out. I have never sprayed anything in the pvc either and have used the same pvc molds for about 6 months. they are starting to warp at the top a bit so looks like i need to go and get another 10 ft for 5 bucks from local hardware store
 
We did a lot of casting in PVC, cause it seemed so logical.

Never did get it to work---hope that makes you feel a LITTLE better.

BE CAREFUL, if you turn it off, wear a face shield. IF you hit it just right, it can really come off QUICKLY!!!
DAMHIKT!!!
 
Brooks or ElMostro I am not...yet.

DSC01045.jpg


DSC01038.jpg


DSC01039.jpg
 
ed4copies said:
We did a lot of casting in PVC, cause it seemed so logical.

Never did get it to work---hope that makes you feel a LITTLE better.

BE CAREFUL, if you turn it off, wear a face shield. IF you hit it just right, it can really come off QUICKLY!!!
DAMHIKT!!!
Click to expand...

I cut the caps off, had a dowel that was a perfect fit, only one really fought me, the rest popped out w/ one or two hits.

Not that thrilled with them, but -only my 2nd casting attempt.

Sean
 
Don't be surprised if they have hairline (or larger) cracks--beatiing them with a dowel is not TLC---
again--DAMHIKT!!

(We WERE CONVINCED it SHOULD work----it rarely did)
 
I use the caps, just never glued. A little Vaseoline petroleum jelly or PAM will make 'em slide right off.

THEN use that useless 1 ton HF arbor press and a dowel to slide the blanks right out:).
 
I don't cap mine .... I just drill a "snug" hole in a 2x or other scrap .... tap the pvc in.
So far I haven't had any issues with "tapping" the cast out with a dowel. Pam IS a good idea ... I need to get more. (before SWMBO sees it's gone) :biggrin:
 
Florida Marine said:
Brooks803 said:
PTownSubbie said:
Sean,

You are experiencing the same as I! I could never get PVC to work for me. Some do and some don't!

I even purchased some expensive mold release but something about it just didn't work for me. Then I created a vertical mold to solve that problem...:cool:

Only thing you can do now is turn off the PVC.
Click to expand...

Not to mention also helping out a fellow caster who didn't want the hassle of PVC to start with! :tongue:

Sean, the one thing Fred and I discovered when we first started with the vertical molds is that the resin doesn't shrink as much width wise as it does height wise. Turning it off seems to be the easiest way that won't potentially break the blank. Other than that, hitting on a hard surface upside down might get it loose, but would could break it alltogether.
Click to expand...

lol...so much for my $2.00 in caps!

darn it
Click to expand...

Well there is your problem!!! Use wide masking tape on the bottom of the mold pvc. IF it ever gets stuck you can peel it off and push it out... I use this method, and i never had a problem.
 
PR shouldn't stick to PVC if the resin is mixed properly and the correct PVC is used.
But, what do I know...:rolleyes:
 
DozerMite said:
PR shouldn't stick to PVC if the resin is mixed properly and the correct PVC is used.
But, what do I know...:rolleyes:
Click to expand...

so...what is the correct PVC and what is the secret to mixing it?

I used the only PVC at hand, some Sched 40 3/4 from HD, and mixed my PR with mica from Coastal Scents with 5 drops per oz. PR was thinned in a water bath.

I thought I was doing it all correctly.
 
Florida Marine said:
DozerMite said:
PR shouldn't stick to PVC if the resin is mixed properly and the correct PVC is used.
But, what do I know...:rolleyes:
Click to expand...

so...what is the correct PVC and what is the secret to mixing it?

I used the only PVC at hand, some Sched 40 3/4 from HD, and mixed my PR with mica from Coastal Scents with 5 drops per oz. PR was thinned in a water bath.

I thought I was doing it all correctly.
Click to expand...

You are....Some can get it to work and some can't....I don't know what it is but I don't think I am jacked up either because I can't get it to work.....

You won't get much more than that. Some throw out comments but nothing that is really helpful.....
 
I would surmise that not all are using the SAME Silmar 41.

We thought that was what we were using, but have since learned otherwise. At the time we tried PVC, we used Hobby Lobby and other -- but we really did not KNOW what it was.

I suspect that's the difference. Even Silmar MAY have additives to adapt to weather (probably not worried about freezing in FLA, you BETTER BE in WIS.) That could affect its characteristics

FWIW
 
Didn't Eugene create the verticle molds? Then Charlie came up with the resin savers?

Or has history been re-written?

PTownSubbie said:
Sean,

You are experiencing the same as I! I could never get PVC to work for me. Some do and some don't!

I even purchased some expensive mold release but something about it just didn't work for me. Then I created a vertical mold to solve that problem...:cool:

Only thing you can do now is turn off the PVC.
Click to expand...
 
Lenny said:
Florida Marine said:
Not that thrilled with them, but -only my 2nd casting attempt.

Sean
Click to expand...


Don't give up one them yet! Sometimes they don't look like much until you start turning them away .... And THEN they take on a whole different look! :) Half the fun is opening the package! :wink: :)
Click to expand...

yeah, I am hoping that.... My daughter has already claimed ownership to one of them. Will turn her a back to school pen to take with her.

I'll post pics.

Sean
 
PTownSubbie said:
You are....Some can get it to work and some can't....I don't know what it is but I don't think I am jacked up either because I can't get it to work.....

You won't get much more than that. Some throw out comments but nothing that is really helpful.....
Click to expand...


I no longer waste time with specifics. No one listens or even acknowledges it, just get grief.

People start casting and think because they used this particular pigment and added this much catalyst and stood on one foot while waiving a magic wand means that their cast will come out because that is what everyone else does.
There is much more than that to consider and even more variables.

With the proper PVC... and the proper mix of PR... it will NOT stick. I have NEVER had one stick.

Waste of time?? Lets wait and see...
 
Turn and polish 1 you may be amazed by what you have. Just shave the outer coat off and polish. Then you'll know if you want to make a pen.
 
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