Metal Casting at Home Part 26 How to make Greensand
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- čas přidán 17. 06. 2024
- I get a lot of questions about the sand I use. Here is my first attempt at making my own greensand. The results are very good. It was a lot of work mixing by hand so the next project could well be an electric muller. More details can be found at myfordboy.blogspot.com
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Absolutely loved watching the whole casting series
Thank you for taking the time and documenting your Blacksmithing, it's very much appreciated
This is really impressive. No matter how often I see casting done, I am always happy to watch more.
Perfect demonstration.
Last time I did this was 46 years ago. Memories flooding back. Thank you.
Thank you very much for the vídeos! I use them in my lessons.
Greatings from Valencia, Spain.
I have seen a lot of professional videos, but your video, sir, showed me more than all of them together. Well done!
Absolutely love your videos. Straight forward no crappy music, great camera angles and simple script describing the process. A big thank you from Australia
Your videos are great, with what I learnt from you I produced my first and successful casting yesterday.
Forming the ingate is an art; many of my attempts result in poorly filled areas, particularly where the part is thin, or contains fine details. These videos are excellent guides for sorting this all out. Thanks!
Love your videos. A good source for bentonite is natural bentonite cat litter, it's nearly 100% bentonite. I'm using an old espresso grinder to grind it into a fine powder before mixing it together with sand.
Thanks for your videos. They are very beautiful, well made, interesting and very instructive!
Very good video. I highly recommend this one for anyone wishing to learn the sand casting process.
Always wonderful clear and instructive videos , ty
I am really enjoying your videos, thank you very much!
Thank you for a clear and well done lesson. I never knew how casting was done.
guy comes from the country with the coolest accent when speaking english and he makes a whole long video without saying a word.
another brilliant video. fascinating and relaxing to watch. love the ambient sounds. all very zen
It's been over 30 years since I taught foundry practice in high school and you did a great job, especially with the sand mix. Clarify your clay type though. Over all...you comunicated well. Thank you for the reintroduction to a past love.
I really like that you take the time so I can learn a thing or 2 about lead smelting T-Y
Love the video, love the background sound...it's so relaxing.
hi from mark thank you for sharing your casting experience --- i appreciate it
Very Educat9ional , and well presented !
I work in a steel foundry where we make green sand and no bake sand molds much bigger. To prevent minute defects in your casting sift a layer of sand over your pattern to get a more fine sand , it will result in a higher quality casting
That is what I was going to say
I've seen him do it in other videos
You will not get a smooth as cast finish with that sand you need a facing sand
Hello there. Can I cast stainless steel parts with this mixture of play sand??
2:10 seems casting sand is without water just oil that stands high temperatures
I enjoyed this video and found it helpful, thank you.
Very good video for sand casting process.
How I wish I had a country like urs were every thing is kept for people who wanna be succesful well u did a great job there
I really like video bcoz you explained in detail from A to Z
great people do great things. thanks elliott
Sir, thank you for your response. I asked my question one video too soon since the newspaper trick was demonstrated in #27. thanks again
My fordby i was watching a program where in the olden days they would mix only molasses and sand interesting..Passed down through generation in some 3rd world country..Always look forward to you months.
@myfordboy thanks i think i might have a go at casting soon
@bladder1010 The air escapes through the porous sand. if it were a larger casting I would have added a riser at the oposite side to the feeder.
A very good how to video---- thank you
Nice. Someday I'll try it.
Thank you for your response - good info - sounds like a lot, but we get out what we put in.
you make this look easy, I've been trying to get a good mold for weeks it either doesn't part off the piece clean, or mold doesn't part clean. Poured one yesterday, mold looked good, still didn't part like yours but thought it would work. Then when I poured it blew out the side. So here I go again. I do however find your work inspiring so will keep watching till I get it right... Thank you for your video's, they've been very helpful....
+Bill Richardson It could be your moisture content is wrong or the bentinite % if you have made your own sand. It takes a bit of practice to get it right
Thank you, I read where 10% clay to sand mix was what you want but that didn't work at all, so I went to adding more clay. Seems to be a lot better I am at about 18% now, most likely pushing the limits. Your videos are so helpful, trying to watch all of them, guess that makes me a fan.... Thanks very much for the reply....
5 things will help.
add zircon flour to your sand mix, it will take the roughness out of the definition, the other this is dust you molds first this will help with release and definition
cut a slag trap in your feeder gate.
add a riser this will help to pressure the casting from two sides, it will also feed it when cooling
if you want super fine then use a zircon spray coating for your mold, you should be able to achieve close to mirror finish
Great work!
Hello there. Can I cast stainless steel parts with this mixture of play sand??
@@umbeatable2770 yes
Hello there lathe machinist over here can i melt and cast carbon steelcand stainless steel in a propane melter ( melt and pour into a mold ) ty
@@marcwire9332 wow lol u responded after 6 years
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If you go to a masonry supply place they will have bags of 120u sand for about 14 bucks/100lbs. Makes for very nice casting sand. Not too fine, not too course. It wont leave grain texture in your casting. Pottery houses sell the powdered bentonite for 2 bucks a pound. {8-10lbs per 100lbs and bag}. Way easier than sifting play sand! and it comes dry :) play sand is usually wet which is why the bags are so small {water is heavy, its packed by weight}
After looking into it, it's "Sodium Bentonite Ash Clay" that you want, and the sand that I see seems to work best with the mulling (and resolution of cast) is the tamping sand you find at Home Depot or Ace that will work best. I noticed when I got my Play Sand, that it looked too sharp in comparison to myfordboy's sand pick. having more powdered look was the easier choice. I intend to Ball-Mill all of my stuff, including my sand first to get it a little finer.
Thank you for inspiring me Ford!
How to make hard work look easy! great video thanks
GREAT VIDEO!
It feeds the casting with metal as it cools and gives pressure to fill the mould.
Avery interesting and very useful
Hi. I found elsewhere a very similar recipe. There they recommended blasting sand (finer than playground sand) and also said that cat litter (the stuff you fill cats' boxes with) is typically 100% betonite. So if someone cannot find betonite, cat litter might be worth giving a shot. Haven't tried that, though, so that is just a second-hand knowledge. Thanks for your videos, David.
Another awesome video, thanks.
love the videos, thanks for posting.
THANK YOU. Making casting sand is as easy as a cup of TEA.
Love your videos! Thanks!!
The extended feeder gives the metal "head". As the metal cools it shrinks and the risers feed the casting. The extension is more important with aluminium than other metals.
Best channel ever
Lost wax casting is one option but you can get great detail with Petrobond sand.You would need a proper crucible for the silver.
you my friend are a man of many words...
What might work well for mixing/stirring would be a paint mixer on an electric drill - pretty sure 30 seconds would do it. Worth a try?
I usualy use a commercial sand. I made up this batch just to see how it worked out. Most people would mix dry and add the water later but I found it easier to do it this way. Its not sufficient to just mix it in a concrete mixer it needs to bepushed together. Adding a steel ball to mixer might work.
It's to give a bit of pressure and to feed the mould as the metal shrinks as it cools.Also its easier to pour into.
I think that graduating to a work bench is about time.
I later used losalt as I feel it gave a better result but I now have some aluminium drossing flux.
I haven't noticed the castings are particularly brittle but maybe softer than the doner metal.
this a beautiful job.
Thank you sir I made it right I think it’s just a fine line between too wet and too dry but thanks forgetting back so quick👍
So peaceful.
At last a good video ! I would suggest a sand muller because mixing by hand is really a chore!
Dear mr good job..but i have a small suggestion.intead of using small knife for creating ingate(way) you can use some other shapes to do the same some thing like 5mm pipe before creating mold..
You can get material to rejuvinuate the sand. I haven't noticed any change in my commesial sand after years of use.
@Dancerpro1 Its best to feed each one seperatly.
Yes I have some. It give a great finish but its more expensive and you loose a little each time as it bakes where it touches the metal.
Great video, keep it up please!
Rely nice video !! keep it up
@StrongBlair The same sand is good for brass.
Around the place where I live about 30cm deep is a layer 30 to 40cm of such sand. It can be easily pressed and holds its form.
It gives a head of metal to feed the mould as it cools.
Dude! You ROCK!!!!
so satisfying.....
@ecksjay89 It came from a different place in the country. Some natural sand could be red or brown.
Hey Dude, thanks for your video, Very helpful, I am just curious if you can use, any type of clay, or should it be the particular type mentioned above ?
myfordboy's greensand ratio, Metric to Imperial:
1kg = 2.21# (sand) to
120g = 0.27# (bentonite)
I recommend watching the entire video though....now you just don't have to convert it
Excellent video, sir! Do let us know how well it reconstitutes before reuse. Also, do the charred portions need to be sifted out?
The quality of castings from your previous sand (which i assume is petrobond) seem to be far better judging from the last shot. I am still looking for a petrobond sand supplier but tryng this should be good for practice in the meantime.
Thank you for sharing.
Your videos are fabulous! I've learned a lot!
I have a little questions:
What grain size do you recommend to get a good mold permeability?? and What percentage of water do you use in each green sand preparation??
Greetings from México!
Have you ever done any lost wax casting? I would love to see some of that. So glad I subscribed, I have learned a lot. Thanks for another great upload.
Thank you Sir!
Btw, a rubber hammer is ideal for compressing the sand!
Hi there,
Nice videos as always. What can I add to the sand to make make my surface finish look smoother? I sifted the sand and clay with a fine screen mesh but I still get a very rough finish.
great vid
@marcuslb95 Worth a try I suppose. They use clay and dung in India to make bells.
Hi
Thanks for the very instructive video. II reall ylike watching them.
I have a question. Why do you had an extensive feeder. Thanks
@OutDoorsMan1342 Yes it can be used over and over.
@stirlinguvstroj This is most people do it but I didn't find it mixed very well that way.
this is an excellent video though that ive been waiting to find for a long time
any severe possible down side to making it yourself?
Sir,
I have watched all your videos up to now and enjoy them immensely. I'm a wood worker and wondered if you ever make full molds and then slice them in half or only make individual halves. Then former method would be more accurate but one would have to take into account saw kerf and sanding loss. Your thoughts?
That's a great instructional. I was thinking about copying/casting some hard to find commemorative pins. Is there a specific type of aluminum that should be used? Can I use the rods that are sold in Home Depot? What about the furnace - is there an alternative for melting the aluminum?
easy to follow i like it
Have a look at video 29 and 33 in this series.
man, you are awesome!
You need something smaller and more controllable than a mallet to ram the sand tight against the pattern.
@Shannariano Greensand is water bonded. Its a natural clay bearing sand or sand with added clay. If oil is used instead of water it is Oil bonded like Petrobond which is technicaly not greensand.
Thanks for your reply, I will try your suggestion. Another question if you don't mind. When mixing salt as a flux and washing soda as a degassing agent, have you ever noticed the material to become more brittle? Have you ever tried to do a break test? I use no salt as flux and baking powder as degassing agent.
Yes thats what I use.
Excellent video in that your comments helped me understand what, & why, you were doing at every stage.
I'm just intigued that you didn't create ventholes for the air to escape. The finished result proved they weren't needed in this case, but why?
The sand gives a degree of venting. Normal practice recommends venting but I have not found it necessary. It is however important to vent cores.
quite interesting, but I would love to know the ratio of sand and clay for a start. Thanks a lot for sharing
Thank you so much!
good stuff