GB GONE Posted December 27, 2010 Report Share Posted December 27, 2010 Before I go to tinkering, anybody had a hinged mold just seize up on them? Mine is extremely tough to open now. Thought about a little WD-40 and working it a bit but thought I would ask before I start messing around. It hasn't been wet or been subjected to anything unusual. I probably don't use it as often as I should! Jim Quote Link to comment Share on other sites More sharing options...
Vodkaman Posted December 27, 2010 Report Share Posted December 27, 2010 Almost certainly galvanic corrosion going on here. A draught of warm air across the cold metal surface would be enough to cause a drop or two of condensation, which would be drawn into the hinge joint by capillary action. A grain of salt thrown into the mix and you have electrolyte. I am assuming aluminium hinge with a steel pin, this would fit the recipe for corrosion. What surprised me was that stainless and aluminium was worse than mild steel and aluminium, due to different galvanic potential differences. Here are a couple of interesting reads on the subject. http://corrosion.ksc.nasa.gov/galcorr.htm http://newsgroups.derkeiler.com/Archive/Rec/rec.aviation.homebuilt/2006-06/msg00577.html Might as well just spray and wiggle, unless anyone else has a better idea. Future prevention is more important, silicon spray or sealed bag or both. Dave Quote Link to comment Share on other sites More sharing options...
smallmouthaholic Posted December 27, 2010 Report Share Posted December 27, 2010 Who's molds are they? I've had some of the molds made for Bear tighten up but the CNC blending block hinge that Bear makes himself is nice and loose.A couple drops of light reel oil on either side of the hinge will loosen it up a bit. Quote Link to comment Share on other sites More sharing options...
GB GONE Posted December 27, 2010 Author Report Share Posted December 27, 2010 Who's molds are they? It is a Bear's Twitchy mold Al. I have never used salt in the mix when making but can't swear salt didn't inadvertantly get on the mold at some point. Just has progressivly gotten tough to open now. Reel oil is a great idea. I'll try that tonight if the WD didn't help out. I worry more about some form of corrsion starting inside where I can't see as Dave mentions. Worst case, I can take it down to a friend and have him take the hinged end off all together. 2 clamps and I am back in business. Thanks for the advise! Jim Quote Link to comment Share on other sites More sharing options...
smallmouthaholic Posted December 27, 2010 Report Share Posted December 27, 2010 (edited) It is a Bear's Twitchy mold Al. I have never used salt in the mix when making but can't swear salt didn't inadvertantly get on the mold at some point. Just has progressivly gotten tough to open now. Reel oil is a great idea. I'll try that tonight if the WD didn't help out. I worry more about some form of corrsion starting inside where I can't see as Dave mentions. Worst case, I can take it down to a friend and have him take the hinged end off all together. 2 clamps and I am back in business. Thanks for the advise! Jim You can always drive the drift pin out, lube it and the inside receiver then put the drift pin back.You could spray them w/ marine corrosion block ( $17.00 a container ) if you're truly worried about permanent corrosion forming. I have quite a few single cavity molds from Bear's and some make you feel like Hulk Hogan trying to open them. Edited to add-I have the same molds and they were very tight when I got them-still are The oil will loosen them just enough for you. Edited December 27, 2010 by smallmouthaholic Quote Link to comment Share on other sites More sharing options...
pirkfan Posted December 27, 2010 Report Share Posted December 27, 2010 I like Blaster dry lube with PTFE (teflon) for stuff like this. The carrier solvent evaporates away very quickly, any overspray is easily wiped off, and the lube itself is a dry film of teflon. Instrument service people in our laboratory use it when working on automated medical instruments. I'm impressed with this stuff, although it probably has limited anti-corrosion properties, it really frees up stiff sticky parts. Quote Link to comment Share on other sites More sharing options...
GB GONE Posted December 27, 2010 Author Report Share Posted December 27, 2010 (edited) Thanks for that info, I work in a hospital so I am sure I can get access easy! My best fishing buddy also works for Beckman-Coulter. Bet he has it laying around! Jim Edited December 27, 2010 by ghostbaits Quote Link to comment Share on other sites More sharing options...
SHK Posted December 27, 2010 Report Share Posted December 27, 2010 Thanks for that info, I work in a hospital so I am sure I can get access easy! My best fishing buddy also works for Beckman-Coulter. Bet he has it laying around! Jim here is what i did Jim, Softener. drip softener on the surfaces that rub and work the snot out of them, i ran across the same thing with a couple molds, used some softener and now they have been working free for over a year without a reapplication. Quote Link to comment Share on other sites More sharing options...
powerworm Posted December 28, 2010 Report Share Posted December 28, 2010 i use the heat stabilizer condensation off my exhaust hood and drip it onto the sides of the hinge then open mold as far as possible and work it back and forth. i had heard there were a few molds that slipped thru that were not drilled out to the correct size or something along that line but it was enough to get the pins thru it just made them extremely tight. if that doesnt help in a few days of using it i have tapped the pins back and forth a few times with a pin punch i just havent ever driven them any more than like a 1/4" either way Quote Link to comment Share on other sites More sharing options...
bribass Posted December 28, 2010 Report Share Posted December 28, 2010 WD works just fine squirt some in and work it back forth for a min Quote Link to comment Share on other sites More sharing options...
Largehead Louie Posted December 28, 2010 Report Share Posted December 28, 2010 Before I go to tinkering, anybody had a hinged mold just seize up on them? Mine is extremely tough to open now. Thought about a little WD-40 and working it a bit but thought I would ask before I start messing around. It hasn't been wet or been subjected to anything unusual. I probably don't use it as often as I should! Jim Quantum Hot Sauce Reel Oil. This stuff is magic! Quote Link to comment Share on other sites More sharing options...
nova Posted December 28, 2010 Report Share Posted December 28, 2010 Worm oil might work as well Jim. www.novalures.com Quote Link to comment Share on other sites More sharing options...
GB GONE Posted December 28, 2010 Author Report Share Posted December 28, 2010 Happy to report that the WD seemed to work its way in and now it moves free enough to use comfortably. Hot Sauce was my next move though!!! That stuff is magic!!!! I will "acquire" some Blaster dry lube with PTFE for a final application and some preventative maintenance. Thanks all! Jim Quote Link to comment Share on other sites More sharing options...
bass100 Posted December 28, 2010 Report Share Posted December 28, 2010 I use cutting oil, the kind you use when you are cutting or drilling metal. It is a great lubricant when you are using something that might get hot. It also works great on lead molds because it will hold up to the heat. Quote Link to comment Share on other sites More sharing options...
pirkfan Posted December 28, 2010 Report Share Posted December 28, 2010 Thanks for that info, I work in a hospital so I am sure I can get access easy! My best fishing buddy also works for Beckman-Coulter. Bet he has it laying around! Jim Home Depot carries the blaster PTFE lubricant. An Abbott service guy had some (we saw way too much of that guy), and that's where he got his. Quote Link to comment Share on other sites More sharing options...
GB GONE Posted December 28, 2010 Author Report Share Posted December 28, 2010 An Abbott service guy had some (we saw way too much of that guy). I know that guy good, too! Free is good!!!!! Jim Quote Link to comment Share on other sites More sharing options...
