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All About Guns What's your weapon of choice, and why? Discuss the beloved speargun here! |
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12-07-2009, 06:33 PM | #61 |
Matt Rey
Join Date: Nov 2004
Location: Florida
Posts: 1,369
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Re: Lost wax carbon fiber molding - first gun
Outstanding design on everything Tinman. Please make those muzzles available for the community! Pretty sure that I'm only going to make muzzles and handles for my personal builds and dive crew. Just don't have the time or resources these days. Plus, I like your muzzles more!
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12-08-2009, 02:34 AM | #62 |
Registered User
Join Date: Aug 2009
Location: cancun mexico
Posts: 718
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Re: Lost wax carbon fiber molding - first gun
tin man you should make those enclosed euros available for the comunity
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12-08-2009, 07:57 AM | #63 |
Senior Member
Join Date: Feb 2007
Location: Spanish Fort, Alabama
Posts: 2,001
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Re: Lost wax carbon fiber molding - first gun
Let's see if it shoots straight first.
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12-08-2009, 03:39 PM | #64 |
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Join Date: Sep 2004
Posts: 416
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Re: Lost wax carbon fiber molding - first gun
Very awesome! If there were a speargun innovator of the year award you would certainly have that right now. Only suggestions I have are 1) use a tompson precision ground 5/16" shaft instead of the delrin because you will have 100% confidence that the track is +/- 0.002 straight over the entire length and 2) if you were to take this to a production level you would simply need to use a female mold and a custom balloon and you would have a very consistent product 3) crossreference the 160 F with the epoxy details sheet and you should gain quite an increase in modulus of the epoxy with the postcure temp.
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12-08-2009, 03:52 PM | #65 |
Senior Member
Join Date: Feb 2007
Location: Spanish Fort, Alabama
Posts: 2,001
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Re: Lost wax carbon fiber molding - first gun
Thanks!
I'm pretty sure the track is straight, because I cut the Delrin out using an 11/32" ball cutter on my mill. At least, it is as straight as my ability to hold it. How confident are you that a 5/16" shaft up to 60" long could be removed after the cure? Would you use an 11/32" steel shaft and mold to the final dimension (allowing clearance for the shaft)? |
12-08-2009, 04:11 PM | #66 |
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Join Date: Sep 2004
Posts: 416
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Re: Lost wax carbon fiber molding - first gun
Those tompson shafts are case hardened and have a super smooth surface finish on them and when coated with meguiars mold release wax, the shaft is easily removed from the laminate. I would make sure there is a decent extension of the shaft to be able to grasp it to remove it. I would fo sure go 11/32nd because you need the clearance to allow the thin film of water to let the shaft glide with little to no contact with the carbon fiber. The straighter the track the better and the tompson shaft should last forever whereas the delrin rod may warp and is definitely not as straight.
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12-08-2009, 04:15 PM | #67 |
Senior Member
Join Date: Feb 2007
Location: Spanish Fort, Alabama
Posts: 2,001
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Re: Lost wax carbon fiber molding - first gun
Thanks Andrew. I'll have to look into that. Please shoot me a PM if you have a source / contact for those shafts. Not having to cut the track afterwards would allow me to get a little crazier with the barrel shape. I kept this one straight on the bottom and sides because I knew I had to hold it to mill the track.
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12-08-2009, 05:56 PM | #68 | |
Senior Member
Join Date: Jul 2009
Location: Newport Beach
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Re: Lost wax carbon fiber molding - first gun
Quote:
Don |
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12-08-2009, 07:04 PM | #69 |
Registered User
Join Date: Sep 2004
Posts: 416
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Re: Lost wax carbon fiber molding - first gun
Yes, grainger or mcmaster is a good source for those shafts. You could take it a step further and thread the shaft into a block that matches the trigger pocket that way most of the structure is all one piece. I forgot to mention that the cross sectional shape you chose is, in my opinion, absolutely perfect. I really think that you could create a fantastic production gun with this and it is well worth the trouble to make a female mold and balloon.
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12-10-2009, 08:13 AM | #70 |
Senior Member
Join Date: Feb 2007
Location: Spanish Fort, Alabama
Posts: 2,001
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Re: Lost wax carbon fiber molding - first gun
A little more progress to report.
I have the modified Neptonics Reef mech mounted now. The line release slot is cut, but I haven't yet completed the lever or spring resetting mechanism. The aluminum handle is ready for Shapelock, and the forward and rear mortises are cut to fit. I started working on the Shapelock last night, but that part always takes me a while. Not because it's hard, but because it is so easy to shape that you get addicted to trying to get the fit "perfect" |
12-10-2009, 10:13 AM | #71 |
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Join Date: Aug 2009
Location: cancun mexico
Posts: 718
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Re: Lost wax carbon fiber molding - first gun
awesome now the gun looks sick man i cant wait to the that finished!
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12-10-2009, 10:29 AM | #72 |
Registered User
Join Date: Sep 2009
Location: Homestead, Fl.
Age: 32
Posts: 2,013
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Re: Lost wax carbon fiber molding - first gun
God it looks so beautifull. Even the fishies are gonna wanna come in for a closer look!!
Dylan |
12-10-2009, 08:02 PM | #73 |
thats fillet 'o' fish
Join Date: Apr 2008
Location: Nebraska by way of San Diego
Age: 39
Posts: 1,086
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Re: Lost wax carbon fiber molding - first gun
wow! and i want 1!.. is all i can say
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david any beach! anytime! as long as the wife and 2yr old says its ok |
12-11-2009, 02:40 AM | #74 | |
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Re: Lost wax carbon fiber molding - first gun
Quote:
Great work Jeff!
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12-11-2009, 11:09 AM | #75 | |
My spawn kills on....
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Re: Lost wax carbon fiber molding - first gun
Quote:
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Safety is but an illusion; Every grain of sand was once a mountain. Every speck of dust..... was once a man. Nothing can stop this, in time. So use the time you have well..... you won't get it back. |
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