Clickspring's thought bubble- "Ahhh mate, I'll just fashion up a rustic Roman era oil lamp....., with a 1 thou interference fit base and a 3 thou deviation on the top surface"
Not quite! Chris would have bought those taps brand new from his local Bunnings. Cheapest way to get quality castable brass in the quantity he needs. Mark from Melbourne Australia
I can’t imagine how time consuming and labour intensive making something like that would have been without any modern machines or gas furnace etc. It must have taken ages anyway even with the machines!
why were the venting tubes in the mold so large? genuinely curious if there was a reason in particular or not, most molding and casting I've seen done on youtube has been done with relatively small venting tubes, and I was wondering if there was something you were trying to avoid by making them very large
larger vent holes means better airflow and a higher chance for a solid pour as opposed to smaller ones that may get blocked off resulting in cavities or bubbles in the metal. Plus with it being brass, there's basically 100% reclaimation to the metal as you can just melt down the excess later for a new pour or just make an ingot.
I’m so pissed! I wait what seems like years between clickspring videos only to find out right this minute you have a second channel you post to all the time!
Agreed. I was really hoping to see the process of making the sprue, and something to show how the oil reservoir would be molded to leave a clear void after the bronze pour. But unfortunately we got no such thing.
@@DaveTpletsch He molded the positive in wax, coated it in gypsum and melted out the wax. The hollow was just filled with gypsum before he poured. My guess is that he molded the bottom of the lamp and then attached a wax plate for the top.
@@FreeOfFantasy I assumed as much as well, I've done a couple of small bronze pours myself so I have passing familiarity with the process. But the making of the sprue tree and the wax positive are very rarely shown in bronze pour videos I've seen for some reason despite the fact that they're vitally important. I mostly just wanted to see the process represented in its entirety. It's a small nitpick at an otherwise excellent video.
@@DaveTpletsch I think the positive was 3D printed and then burned out of the plaster matrix. And plastic burning isn't ecological... that's why he didn't show it in the video.
I like your home made gas burner, I made one similar to dry the wax on the citrus in my fruit grading machine. Works well, eh. Except I did notice the holes weren't drilled evenly. That's not like you Chris! I'll let you off this time :)
I can hear your wife as you walk thru the kitchen with an LNG tank, a hood, gloves, etc. " Kids let's go to the neighbor's " ( again) Where did you buy the glass oil containers??
Nice job! One comment - I really don't think that many heavy spruces was necessary and you just made extra work for yourself, especially when using vacuum casting or centrifugal casting, but even with gravity casting.
Beautiful. Also, I like to imagine that you have been stalking around the suburbs nicking taps to melt down, and the real reason you've been away from the channel is a bit of community service in penance
Two things: What was the thing the mold was sitting in? Some kind of heater or vacuum chamber? Secondly - why did the bottom need to be made separately? Wouldn't it cast just fine with the base on there, or would it make it too hard to clean out the casting medium?
Yeah, the mold was in a perforated flask, sitting on a silicone gasket in a vacuum chamber. The perf pulls the air through. They have a rubber sock that goes over the perf flask to keep the investment from leaking out, then you pull it off when pouring. It's possible he thought the re-entrant angle would capture air bubbles during investment, so he did it in two pieces.
