Thread: NGR worthless wood my a__e

Nice work trevor looks to me like a job well done. Now that you have made one like that I am sure plenty will follow question is did you use a pressure pot or do it without ?


Cheers Ian

Originally Posted by Dorno

Nice work trevor looks to me like a job well done. Now that you have made one like that I am sure plenty will follow question is did you use a pressure pot or do it without ?


Cheers Ian

Thanks Ian and yes all my ww casting is done using a pressure pot.

Not sure how or why this thread ended up in this Pen Turning Challenges section it was supposed to be under the casting section??????

Trev ask the Mods I am sure they will move it for you.

Cheers

Hi can one of the mods please move this thread to the pen turning section

Cheers Rumnut

Originally Posted by tdrumnut

Hi can one of the mods please move this thread to the pen turning section

Cheers Rumnut

Done

Hey Trevor

Mate nicely done love the look of that one ;-) how much pressure do u use with ur pot and molds ;-)

Ian

Originally Posted by Nai84

Hey Trevor

Mate nicely done love the look of that one ;-) how much pressure do u use with ur pot and molds ;-)

Ian

Hey Ian I never go over 40 psi, that is sufficient for any casting. One thing that I have learnt (dont ask how) is that when making my moulds I make them with thick walls so the pressure doesn't distort the walls and about 5mm deeper than the finished blank size required so as to allow for enough resin to be forced into any voids. Also don't wait to long after adding the catalyst to the resin as if it sets to fast it wont go into the voids. I've added some pics tonshow what I mean.

Cheers Trev

Hey Trevor

Thanks mate ur molds look good ) do u think my molds will hold up to the pressure????

Ian

Originally Posted by Nai84

Hey Trevor

Thanks mate ur molds look good ) do u think my molds will hold up to the pressure????

Ian

Good looking moulds Ian I agree with Trevor, you shouldn't need pressure with those "resinsaver" moulds, but if you use pressure don't use any more than about 20 psi.

9 times out of ten I use these moulds without pressure.

Nice looking pens Trev and great looking moulds too. I still haven't used my pressure pot. The smaller moulds don't seem to need it and my bigger mould I put on the scroll saw and shake about as Neil showed us the say we went down. Must use it soon or sell the damn thing.

Originally Posted by Nai84

Hey Trevor

Thanks mate ur molds look good ) do u think my molds will hold up to the pressure????

Ian

Ian they will be fine but as Neil & Greg said dont go above 20 psi.
The silicon that Greg suggested is selleys product speed seal & would be perfect for repairing the nipples, the other thing I would suggest is using an electronic jewelery cleaner to heat up your resin prior to mixing (aldi has them at the moment for $29.95) I use one all the time and it definately reduces the bubbles.

Cheers Trev

Originally Posted by tdrumnut

Ian they will be fine but as Neil & Greg said dont go above 20 psi.
The silicon that Greg suggested is selleys product speed seal & would be perfect for repairing the nipples, the other thing I would suggest is using an electronic jewelery cleaner to heat up your resin prior to mixing (aldi has them at the moment for $29.95) I use one all the time and it definately reduces the bubbles.

Cheers Trev

Hey Trevor

Thanks mate for the help. When I pour my resin I have used most of step to reduce bubbles so I will try what u have suggested and see how I go that's for the help guys much appreciated ;-)

Ian

The Instructables web site had a nice article on modifying a Harbour Freight pressure pot for doing castings. I'm fairly sure there is very little difference between the Harbour Freight model and the one sold at Supercheap Auto so it might be useful to read.

There are some links for mold making in that one, too.

Bubble-Free Resin Casts with Modified Paint Tank

Originally Posted by Trent The Thief

The Instructables web site had a nice article on modifying a Harbour Freight pressure pot for doing castings. I'm fairly sure there is very little difference between the Harbour Freight model and the one sold at Supercheap Auto so it might be useful to read.

There are some links for mold making in that one, too.

Bubble-Free Resin Casts with Modified Paint Tank

Thanks mate )

Ian