Belo trabalho mais videos assim de montagem de modelos de espuma complexos
@jkohutiakКүн бұрын
nice work!
@kisoia2 күн бұрын
Hi Kelly - Off topic - do you know why the forum is down? I hope it's temporary :)
@kellycoffield5332 күн бұрын
I don't know the reason, but it was back up as of this morning. Best, Kelly
@kisoia2 күн бұрын
@@kellycoffield533 Yes, glad to see it's back. After what happened to the other forum, it makes me nervous :)
@LS1NNOVATIONS2 күн бұрын
What is the purpose of the coating dip?
@kellycoffield533Күн бұрын
It regulates the rate at which vaporized foam escapes to the surrounding mold and improves the surface finish of the casting. Best, Kelly
@JulianMakes3 күн бұрын
wow superb result! i'd love to see how you make your lovely foam patterns! I;d love to cast a large flat heatsink. thanks and subcribed
@carlmic74 күн бұрын
Hello, do you have time to do a couple of castings for me?
@metalurgex5 күн бұрын
Hello Mr Kelly. I have been seeing yours videos and they are very interesting. However, yours patterns are made by CNC or for expansion process too?
@kellycoffield5335 күн бұрын
For the last several years, all of my patterns have been machined on a hobby grade CNC Router from rigid extruded polystyrene (XPS) board. Prior to that they were manually machined and/or hot wired. IMO, molding the Lost Foam patterns is impractical for one offs or small hobby quantities because of the effort required to make the mold, and poor availability and very short shelf life of pre-expanded bead stock. If it was a higher production setting molded patterns would be the preferred process. Best, Kelly
@truethought3696 күн бұрын
Looks good, nice one. thanks.
@truethought3696 күн бұрын
When you have wet slip in hollows, after mopping out with a brush, could you use a hire drier on low heat to finish drying the part? This is very interesting and thank you.
@truethought3696 күн бұрын
Thank You for this very interesting info. I would like to make a small 4 stroke engine, to start with! If I am successful, I have a V-Twin design, that needs to be made. I will keep looking at your vids for more info, Thankyou.
@someonenamedbob6 күн бұрын
That's brilliant.
@truethought3697 күн бұрын
This is very interesting! How does the blue pattern disappear when you pour the alloy in? I do like the motorcycle cylinder, that will polish up really well. Thanks for your info.
@kellycoffield5337 күн бұрын
It's evaporated by the heat of the molten metal and the gas escpaes into the mold as the metal replaces the volume occupied by the foam. Best, Kelly
@ansleyklein62217 күн бұрын
I understand foundry work. So WTF is the point of this incredibly uninformative piece of crap? And from Kelly Coffield, an awfully intelligent guy who has done lots of interesting things in his videos, yet!
@kellycoffield5337 күн бұрын
It was from 6 years ago when I was doing my own LF process development on pour temps and corresponding travel distance in sand molds. The traditional standard foundry fluidity test is the distance traveled along a spiral path for a given alloy and pour temp. It was made for discussion for a thread on the THF casting forum and before I was making videos for public consumption. I should go back and make those all private vids but that would make those forum threads useless and I have more regard for the forum mermbers than KZreadrs that would make such remarks before trying to undertsand their purpose.
@JVW-ju8el8 күн бұрын
I spent a fortune on Petrobond to turn out mediocre castings. You make magic with an 8 dollar bag of sand from the Home Depot. Respect.
@codapedro8 күн бұрын
Great job!! Amazing gear!!
@rufustoad112 күн бұрын
This is so amazing. I have soooo many questions but the biggest one is why do you not have a bunch of black smoke from the foam burning off? Can you do this same thing with aluminum bronze?
@kellycoffield53312 күн бұрын
I've worked very hard at that. It's a combination of casting and feed system design, proper permeability of the refractory coating, and pouring cup design. Most of my castings have high surface area/volume which is also helpful. Yes, other alloys are possible too with lost foam including iron. Best, Kelly
@kenkelly584813 күн бұрын
very nice castings. best foam oi have seen to date. super clean as well
@martinc921513 күн бұрын
Absolutely beautiful.
@deemdoubleu13 күн бұрын
Awesome stuff
@keepsgoing4evr113 күн бұрын
This is amazing to see your work man. All completed at home lol. I just randomly ran across your videos and will look forward to more. Keep up the great work sir 👍
@annpeerkat202013 күн бұрын
inspirational, thanks.
@marcosalguero26913 күн бұрын
Hey Kelly! I'm a young engineer, and have really enjoyed watching your videos as inspiration/education for my own projects. I haven't found it yet (maybe I need to watch more) but I'm wondering what slurry you use for dipping?
@kellycoffield53313 күн бұрын
SEarch my channel "Refractory Coatings". There is a video dedicated to the subject. Best, Kelly
@rosstisbury162614 күн бұрын
Super Impressive 😊
@PeterLee-zn3jl14 күн бұрын
Verrry tasty stuff.. MMMM GOOD ,! Unusual stuff is almost perfect... and LOOKS VERY PROFESSIONAL.. TESTS AND REVEW..?
@donsheehan514414 күн бұрын
Genius
@richardjones216915 күн бұрын
I would love to know how much money it costs for the customer . You do amazing work . I am thinking 10k to 15k . You can't go buy that stuff off the shelf . I would think any part would be times 10x to 15x percent of the cost of something close to production parts price .
@rickhalverson225215 күн бұрын
Absolutely amazing. Although cooling goes down if your fins are too close together. Unless you use active forced air cooling. You can download the charts on it. It's the same way with heat sinks. They have to be a certain distance apart if you're not using a pressure fan. You need good air pressure if you put your fins too close together.
@LuggageStardate15 күн бұрын
High precision castings they coat a lost wax pattern in plaster and sand then melt the wax. Every thing is a tradeoff but a finished part that doesnt need more done to it after is probably worth the extra steps before hand.
@chrisdunham716915 күн бұрын
Thanks for putting up this one, very interesting. This is a little information that I hope you will find helpful. In order for cooling fins to operate effectively they need to have a taper from the base to the tip and the shape of the tip and base (and the angle of taper to a lesser extent) are quite critical. There are a number of excellent research papers available online which describe the dynamics of heat risers / dams in cooling fins. In short - heat will not travel up the fin and dissipate at the tip in a flow (not dissimilar to a stream flowing ) and transfer to the air stream without the appropriate taper. The second issue is that of harmonic vibration. Everything vibrates and more especially in an internal combustion engine in operation there is considerable vibration. Parallel fins without taper will break off sooner or later. I found this out the hard way and before I became aware of the complexity of cooling fins. Keep at it, I've subscribed to your channel and look forward to more of your foam casting videos.
@BLECHHAUS16 күн бұрын
beau ti full !! What is that pink stuff ya're using for the "lost foam" ?
@rock3tcatU23316 күн бұрын
That is amazing quality you managed to achieve.
@Leaked_Dudes16 күн бұрын
Fantastic vid!
@RustyInventions-wz6ir17 күн бұрын
Just found your channel and subscribed. Very nice work
@toughtrucksoftx17 күн бұрын
I am curious how you’re going to drive the oil pump having moved the distributor.
@kellycoffield53317 күн бұрын
You make a plug from an old distributor with shaft and gear. Best to make sure it has a good gear.......this intake needs to be removed to pull the plug. Pretty common thing to do with crank trigger ignition systems too. Best, Kelly
@toughtrucksoftx13 күн бұрын
I kinda figured that was the solution. Fantastic work sir.
@kurtdobson18 күн бұрын
Beautiful work!!!
@niceboy76118 күн бұрын
Look at the neje max 4 laser engraver they have those drag knifes on sale now at neje shop
@jeremycrisp448819 күн бұрын
Awesome work!
@WesAdams-HillsideAuto20 күн бұрын
Wow! Super nice work! I can totally appreciate the amount of time and effort that went into all this. Really incredible.
@WesAdams-HillsideAuto20 күн бұрын
Very cool Kelly!!! I’m a big FE fan and my second fav is the 335 stuff. It’s neat to see people (like your self) are keeping it alive.
@joem685921 күн бұрын
that looks fantastic... wow. Got me thinking about my Fusion360 and my Avid CNC and home depot foam board.... lol
@craigmerrow22522 күн бұрын
Built a Dave Gingery charcoal foundry years ago, made some cool stuff with it, but your setup is just fantastic!
@braxyoud23 күн бұрын
Are you accepting new work? How would one get in contact with you?
@Happywoodworker24 күн бұрын
Would you be willing to share any details on the construction of the final aluminum drag knife. How is the 1/4" shaft connected to the bearings.
@kellycoffield53324 күн бұрын
They are press fit. I bought 1/4" diameter precision ground dowel pins from McMaster Carr of the desired length. They pressed nicely into the 1/4" bearing bore. Best, Kelly
@Happywoodworker24 күн бұрын
@@kellycoffield533 Thank You.
@user-vb5gb5jl5o24 күн бұрын
عمل رائع واصل.شكرا جزيلا.
@rolanddube216925 күн бұрын
Once again, you have opened my eyes as to what is possible in one man's garage. Thank you for your video.
@garymucher408225 күн бұрын
Over the years I've made a lot of gaskets using a LASER engraver setup. And even some with what looked burnt on the edges after being cut out worked perfectly. Another idea is to either take the old gasket, or the part that it is going to fit one, if you can, and use a scanner to copy the gasket surface needing a gasket and transfer that to the LASER engraver to cut a new gasket out. Some times you have to get creative... Thumbs Up!
@kellycoffield53325 күн бұрын
Do you recall the gasket material, thickness , and laser wattage? Best, Kelly
@garymucher408225 күн бұрын
@@kellycoffield533 Well mostly I used the typical auto store gasket material and cut on a 25 watt C02 LASER system. Never had any issues ever...
@littlenickie95125 күн бұрын
I need this guy as a teacher
@ThisIsToolman26 күн бұрын
I fancy myself as a pretty clever fellow with a few patents to my name, able with respect to most trades but you, sir, are incredible. I pale in comparison.
@KarelBeelaertsvanBlokland27 күн бұрын
Can you make a carb intake manifold for the Porsche 928 engines?
Пікірлер
Belo trabalho mais videos assim de montagem de modelos de espuma complexos
nice work!
Hi Kelly - Off topic - do you know why the forum is down? I hope it's temporary :)
I don't know the reason, but it was back up as of this morning. Best, Kelly
@@kellycoffield533 Yes, glad to see it's back. After what happened to the other forum, it makes me nervous :)
What is the purpose of the coating dip?
It regulates the rate at which vaporized foam escapes to the surrounding mold and improves the surface finish of the casting. Best, Kelly
wow superb result! i'd love to see how you make your lovely foam patterns! I;d love to cast a large flat heatsink. thanks and subcribed
Hello, do you have time to do a couple of castings for me?
Hello Mr Kelly. I have been seeing yours videos and they are very interesting. However, yours patterns are made by CNC or for expansion process too?
For the last several years, all of my patterns have been machined on a hobby grade CNC Router from rigid extruded polystyrene (XPS) board. Prior to that they were manually machined and/or hot wired. IMO, molding the Lost Foam patterns is impractical for one offs or small hobby quantities because of the effort required to make the mold, and poor availability and very short shelf life of pre-expanded bead stock. If it was a higher production setting molded patterns would be the preferred process. Best, Kelly
Looks good, nice one. thanks.
When you have wet slip in hollows, after mopping out with a brush, could you use a hire drier on low heat to finish drying the part? This is very interesting and thank you.
Thank You for this very interesting info. I would like to make a small 4 stroke engine, to start with! If I am successful, I have a V-Twin design, that needs to be made. I will keep looking at your vids for more info, Thankyou.
That's brilliant.
This is very interesting! How does the blue pattern disappear when you pour the alloy in? I do like the motorcycle cylinder, that will polish up really well. Thanks for your info.
It's evaporated by the heat of the molten metal and the gas escpaes into the mold as the metal replaces the volume occupied by the foam. Best, Kelly
I understand foundry work. So WTF is the point of this incredibly uninformative piece of crap? And from Kelly Coffield, an awfully intelligent guy who has done lots of interesting things in his videos, yet!
It was from 6 years ago when I was doing my own LF process development on pour temps and corresponding travel distance in sand molds. The traditional standard foundry fluidity test is the distance traveled along a spiral path for a given alloy and pour temp. It was made for discussion for a thread on the THF casting forum and before I was making videos for public consumption. I should go back and make those all private vids but that would make those forum threads useless and I have more regard for the forum mermbers than KZreadrs that would make such remarks before trying to undertsand their purpose.
I spent a fortune on Petrobond to turn out mediocre castings. You make magic with an 8 dollar bag of sand from the Home Depot. Respect.
Great job!! Amazing gear!!
This is so amazing. I have soooo many questions but the biggest one is why do you not have a bunch of black smoke from the foam burning off? Can you do this same thing with aluminum bronze?
I've worked very hard at that. It's a combination of casting and feed system design, proper permeability of the refractory coating, and pouring cup design. Most of my castings have high surface area/volume which is also helpful. Yes, other alloys are possible too with lost foam including iron. Best, Kelly
very nice castings. best foam oi have seen to date. super clean as well
Absolutely beautiful.
Awesome stuff
This is amazing to see your work man. All completed at home lol. I just randomly ran across your videos and will look forward to more. Keep up the great work sir 👍
inspirational, thanks.
Hey Kelly! I'm a young engineer, and have really enjoyed watching your videos as inspiration/education for my own projects. I haven't found it yet (maybe I need to watch more) but I'm wondering what slurry you use for dipping?
SEarch my channel "Refractory Coatings". There is a video dedicated to the subject. Best, Kelly
Super Impressive 😊
Verrry tasty stuff.. MMMM GOOD ,! Unusual stuff is almost perfect... and LOOKS VERY PROFESSIONAL.. TESTS AND REVEW..?
Genius
I would love to know how much money it costs for the customer . You do amazing work . I am thinking 10k to 15k . You can't go buy that stuff off the shelf . I would think any part would be times 10x to 15x percent of the cost of something close to production parts price .
Absolutely amazing. Although cooling goes down if your fins are too close together. Unless you use active forced air cooling. You can download the charts on it. It's the same way with heat sinks. They have to be a certain distance apart if you're not using a pressure fan. You need good air pressure if you put your fins too close together.
High precision castings they coat a lost wax pattern in plaster and sand then melt the wax. Every thing is a tradeoff but a finished part that doesnt need more done to it after is probably worth the extra steps before hand.
Thanks for putting up this one, very interesting. This is a little information that I hope you will find helpful. In order for cooling fins to operate effectively they need to have a taper from the base to the tip and the shape of the tip and base (and the angle of taper to a lesser extent) are quite critical. There are a number of excellent research papers available online which describe the dynamics of heat risers / dams in cooling fins. In short - heat will not travel up the fin and dissipate at the tip in a flow (not dissimilar to a stream flowing ) and transfer to the air stream without the appropriate taper. The second issue is that of harmonic vibration. Everything vibrates and more especially in an internal combustion engine in operation there is considerable vibration. Parallel fins without taper will break off sooner or later. I found this out the hard way and before I became aware of the complexity of cooling fins. Keep at it, I've subscribed to your channel and look forward to more of your foam casting videos.
beau ti full !! What is that pink stuff ya're using for the "lost foam" ?
That is amazing quality you managed to achieve.
Fantastic vid!
Just found your channel and subscribed. Very nice work
I am curious how you’re going to drive the oil pump having moved the distributor.
You make a plug from an old distributor with shaft and gear. Best to make sure it has a good gear.......this intake needs to be removed to pull the plug. Pretty common thing to do with crank trigger ignition systems too. Best, Kelly
I kinda figured that was the solution. Fantastic work sir.
Beautiful work!!!
Look at the neje max 4 laser engraver they have those drag knifes on sale now at neje shop
Awesome work!
Wow! Super nice work! I can totally appreciate the amount of time and effort that went into all this. Really incredible.
Very cool Kelly!!! I’m a big FE fan and my second fav is the 335 stuff. It’s neat to see people (like your self) are keeping it alive.
that looks fantastic... wow. Got me thinking about my Fusion360 and my Avid CNC and home depot foam board.... lol
Built a Dave Gingery charcoal foundry years ago, made some cool stuff with it, but your setup is just fantastic!
Are you accepting new work? How would one get in contact with you?
Would you be willing to share any details on the construction of the final aluminum drag knife. How is the 1/4" shaft connected to the bearings.
They are press fit. I bought 1/4" diameter precision ground dowel pins from McMaster Carr of the desired length. They pressed nicely into the 1/4" bearing bore. Best, Kelly
@@kellycoffield533 Thank You.
عمل رائع واصل.شكرا جزيلا.
Once again, you have opened my eyes as to what is possible in one man's garage. Thank you for your video.
Over the years I've made a lot of gaskets using a LASER engraver setup. And even some with what looked burnt on the edges after being cut out worked perfectly. Another idea is to either take the old gasket, or the part that it is going to fit one, if you can, and use a scanner to copy the gasket surface needing a gasket and transfer that to the LASER engraver to cut a new gasket out. Some times you have to get creative... Thumbs Up!
Do you recall the gasket material, thickness , and laser wattage? Best, Kelly
@@kellycoffield533 Well mostly I used the typical auto store gasket material and cut on a 25 watt C02 LASER system. Never had any issues ever...
I need this guy as a teacher
I fancy myself as a pretty clever fellow with a few patents to my name, able with respect to most trades but you, sir, are incredible. I pale in comparison.
Can you make a carb intake manifold for the Porsche 928 engines?
Have you build your equipment by yourself?