IH885XLMAN Posted July 29, 2019 Share Posted July 29, 2019 John you need to speak to rory day and get these builds in classic tractor mate Quote Link to comment Share on other sites More sharing options...
844john Posted July 29, 2019 Author Share Posted July 29, 2019 42 minutes ago, IH885XLMAN said: John you need to speak to rory day and get these builds in classic tractor mate It's not really my sort of thing to be honest Nigel. Anyway, I think I bore enough people on here with them without subjecting a wider audience to them! 2 Quote Link to comment Share on other sites More sharing options...
Tractorman810 Posted July 29, 2019 Share Posted July 29, 2019 14 minutes ago, 844john said: It's not really my sort of thing to be honest Nigel. Anyway, I think I bore enough people on here with them without subjecting a wider audience to them! you dont bore people john , you may p*** them a bit of with your amazing skills mind . just wondering, are you going to take a cast of the mf1200 wheel ?? if so i may be intrested in a couple of pairs to remake one i got as scrap a while back, got the tyres with it but they had the hubs away 1 Quote Link to comment Share on other sites More sharing options...
844john Posted July 30, 2019 Author Share Posted July 30, 2019 9 hours ago, Tractorman810 said: you dont bore people john , you may p*** them a bit of with your amazing skills mind . just wondering, are you going to take a cast of the mf1200 wheel ?? if so i may be intrested in a couple of pairs to remake one i got as scrap a while back, got the tyres with it but they had the hubs away Well spotted there Sean! Yes, I'm intending to cast them as they're the same as the wider wheel option on these nashes, and funnily enough i bought a 1200 a few years back without any wheels so i can replace them as well. I was just mulling over whether to cast them separate or as a whole as i do seem to get a lot of air bubbles in my tyres when using the rubber, but maybe I'm doing something wrong? Either way, there'll be a couple of extra pairs done Quote Link to comment Share on other sites More sharing options...
catkom3 Posted July 30, 2019 Share Posted July 30, 2019 (edited) 4 hours ago, 844john said: Well spotted there Sean! Yes, I'm intending to cast them as they're the same as the wider wheel option on these nashes, and funnily enough i bought a 1200 a few years back without any wheels so i can replace them as well. I was just mulling over whether to cast them separate or as a whole as i do seem to get a lot of air bubbles in my tyres when using the rubber, but maybe I'm doing something wrong? Either way, there'll be a couple of extra pairs done Any milking equipement on the farm John,if so you could rig up a vacuum chamber to remove the air bubbles,?? Or one of these,never seen this video before,might be handy for anyone casting small parts,https://www.youtube.com/watch?v=5Uc_xWgl1ZI Regards Joe. Edited July 30, 2019 by catkom3 1 Quote Link to comment Share on other sites More sharing options...
844john Posted July 30, 2019 Author Share Posted July 30, 2019 1 hour ago, catkom3 said: Any milking equipement on the farm John,if so you could rig up a vacuum chamber to remove the air bubbles,?? Or one of these,never seen this video before,might be handy for anyone casting small parts,https://www.youtube.com/watch?v=5Uc_xWgl1ZI Regards Joe. Thanks Joe, will watch that later, looks a useful bit of kit! Ours used to be a small dairy farm, but that was many years ago now, none of the kit left I'm afraid 1 Quote Link to comment Share on other sites More sharing options...
Stabliofarmer Posted July 30, 2019 Share Posted July 30, 2019 2 hours ago, catkom3 said: Any milking equipement on the farm John,if so you could rig up a vacuum chamber to remove the air bubbles,?? Or one of these,never seen this video before,might be handy for anyone casting small parts,https://www.youtube.com/watch?v=5Uc_xWgl1ZI Regards Joe. Very handy little video there Joe, Ive found a few of my moulds recently have failed after fewer casts than they should, and it has been due to micro air bubbles in the silicone. This looks like a very cheap method to degas it, cheers! As everyone else has said John, fantastic work! Your speed is impressive, even working full time on models I don't think I could keep up with your output! 1 Quote Link to comment Share on other sites More sharing options...
844john Posted July 30, 2019 Author Share Posted July 30, 2019 Thanks James, I must admit I've had very mixed results with casting rubber, hope this helps! Quote Link to comment Share on other sites More sharing options...
844john Posted July 31, 2019 Author Share Posted July 31, 2019 I've watched the video thanks Joe, but I'll be honest I've no idea how you would use such a thing when your casting, hopefully someone can help me understand....I'm probably just being a bit thick! 1 Quote Link to comment Share on other sites More sharing options...
Stabliofarmer Posted July 31, 2019 Share Posted July 31, 2019 Not thick John, just learning like we all do, resin casting isn't exactly classed as a general knowledge topic! You place your silicone in the chamber, and then draw the vacuum, this pulls the air bubbles out of the silicone before you pour it, which is the same thing as when you pour the silicone in a thin stream from a height to break up the air bubbles. It's less common to degas resin or casting rubber as they have much shorter pot lives so by the time you've faffed about degassing the stuffs set solid. For resin it is common to pour the resin into the mould then place the mould in a pressure pot chamber and allow it to cure under pressure, which compresses the air bubbles so that they are too small to notice. Quote Link to comment Share on other sites More sharing options...
844john Posted July 31, 2019 Author Share Posted July 31, 2019 1 hour ago, Stabliofarmer said: Not thick John, just learning like we all do, resin casting isn't exactly classed as a general knowledge topic! You place your silicone in the chamber, and then draw the vacuum, this pulls the air bubbles out of the silicone before you pour it, which is the same thing as when you pour the silicone in a thin stream from a height to break up the air bubbles. It's less common to degas resin or casting rubber as they have much shorter pot lives so by the time you've faffed about degassing the stuffs set solid. For resin it is common to pour the resin into the mould then place the mould in a pressure pot chamber and allow it to cure under pressure, which compresses the air bubbles so that they are too small to notice. Ah, thanks James, with you now! Maybe I've just been lucky but the moulds tend not to be much of an issue, it's when I'm casting rubber tyres that i get the problems with often large air bubbles on the underside of the tyre leaving them unusable, I'm probably running at a 50% success rate at best, hence why I'm pondering going back to casting the whole wheel in resin Quote Link to comment Share on other sites More sharing options...
Popular Post 844john Posted August 1, 2019 Author Popular Post Share Posted August 1, 2019 Cab primed on the 784, starting to look a bit more like it should now 14 Quote Link to comment Share on other sites More sharing options...
Popular Post 844john Posted August 1, 2019 Author Popular Post Share Posted August 1, 2019 and the start of the next batch while the paint hardens on the others, IH 684 2wd, 785 4wd, Case 685 4wd and Case 4230 L cab 4wd 14 Quote Link to comment Share on other sites More sharing options...
mb86 Posted August 1, 2019 Share Posted August 1, 2019 Brilliant john, I'm looking forward to seeing them all lined up when finished. Did you say something about an update on the blue one... Quote Link to comment Share on other sites More sharing options...
844john Posted August 1, 2019 Author Share Posted August 1, 2019 18 minutes ago, mb86 said: Brilliant john, I'm looking forward to seeing them all lined up when finished. Did you say something about an update on the blue one... Thanks Martin, yes, I meant to take a few pics of them this morning but i ended up getting waylaid, will make that a priority tomorrow 1 Quote Link to comment Share on other sites More sharing options...
IH885XLMAN Posted August 1, 2019 Share Posted August 1, 2019 Wow they are nice liking the sekura 784 allot Quote Link to comment Share on other sites More sharing options...
Janval Posted August 1, 2019 Share Posted August 1, 2019 I had put the thoughts of casting myself off for quite a while now, shame on you @844john for firing those thoughts back up again Looks very good, and very fun! 1 Quote Link to comment Share on other sites More sharing options...
mb86 Posted August 1, 2019 Share Posted August 1, 2019 38 minutes ago, 844john said: Thanks Martin, yes, I meant to take a few pics of them this morning but i ended up getting waylaid, will make that a priority tomorrow That is easy done this time of year, or any for that matter. Excellent I'll await them with baited breath! Quote Link to comment Share on other sites More sharing options...
844john Posted August 2, 2019 Author Share Posted August 2, 2019 10 hours ago, mb86 said: That is easy done this time of year, or any for that matter. Excellent I'll await them with baited breath! It's not just me then! 1 Quote Link to comment Share on other sites More sharing options...
844john Posted August 2, 2019 Author Share Posted August 2, 2019 10 hours ago, Janval said: I had put the thoughts of casting myself off for quite a while now, shame on you @844john for firing those thoughts back up again Looks very good, and very fun! Sorry Jan.......but you know you want to! Trouble is, it can be dangerous, normally I might have a couple of things that I'm working on at the same time.....now that I'm using the casts there's 14 tractors in various stages on my bench!! 1 Quote Link to comment Share on other sites More sharing options...
844john Posted August 2, 2019 Author Share Posted August 2, 2019 10 hours ago, IH885XLMAN said: Wow they are nice liking the sekura 784 allot Thanks Nigel, I'm quite pleased with how the Sekura cabs are turning out Quote Link to comment Share on other sites More sharing options...
Janval Posted August 2, 2019 Share Posted August 2, 2019 8 hours ago, 844john said: Sorry Jan.......but you know you want to! Trouble is, it can be dangerous, normally I might have a couple of things that I'm working on at the same time.....now that I'm using the casts there's 14 tractors in various stages on my bench!! Sounds dangerous, my shelves are already filled with stand stills. I'll try and get the grips of what I need to start casting. 1 Quote Link to comment Share on other sites More sharing options...
dm434 Posted August 2, 2019 Share Posted August 2, 2019 21 hours ago, 844john said: Cab primed on the 784, starting to look a bit more like it should now yes please Quote Link to comment Share on other sites More sharing options...
dm434 Posted August 2, 2019 Share Posted August 2, 2019 21 hours ago, 844john said: and the start of the next batch while the paint hardens on the others, IH 684 2wd, 785 4wd, Case 685 4wd and Case 4230 L cab 4wd Yet another Nash I used to drive , brilliant 1 Quote Link to comment Share on other sites More sharing options...
844john Posted August 2, 2019 Author Share Posted August 2, 2019 2 hours ago, dm434 said: Yet another Nash I used to drive , brilliant 4230 David? Quote Link to comment Share on other sites More sharing options...
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