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Posted: 1/20/2013 11:08:29 AM EDT
[#1]
To make the forging or the complete thing?
You'd need a mill (preferably cnc) to finish it. |
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Posted: 1/20/2013 11:20:33 AM EDT
[#2]
Quoted:
To make the forging or the complete thing? You'd need a mill (preferably cnc) to finish it. Not much point in doing it, if the effort is to build your own gun. |
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Posted: 1/20/2013 12:23:06 PM EDT
[#3]
Quoted:
To make the forging or the complete thing? You'd need a mill (preferably cnc) to finish it. You could pour molten aluminum into a mold (created from sand) and have essentially a receiver paper weight. Get a jig and drill press and you could complete it. |
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Posted: 1/20/2013 12:27:49 PM EDT
[#4]
I don't see the point of making a casting that would still require a significant amount of machining to finish, versus just starting with a 0% or 80% lower or even just a block of aluminum.
I have a coworker who made several sand molds and castings and made an engine, and when asked why his reply was I wanted to see if I could do it or something to that effect. If you want to cast something and probably learn a lot in the process, go for it. |
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Posted: 1/20/2013 12:36:14 PM EDT
[#5]
Holy crap! Your HS had a foundry??? We had a band saw...
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Posted: 1/20/2013 12:40:27 PM EDT
[#6]
Quoted:
Holy crap! Your HS had a foundry??? We had a band saw... Damn..... You guys had a band saw? 
We were lucky to have duct tape available. |
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Posted: 1/20/2013 12:42:34 PM EDT
[#7]
Quoted: Holy crap! Your HS had a foundry??? We had a band saw... Hell, mine had a whole casting section. Moulds, sand and a whole bunch of different patterns of things to make. Teacher poured twice a week. Foot gas pedal, cobra shift handle. There was even a whole set of patterns to make a bench top belt sander. Had a forge for heat treating as well as heating steel for hammering. I hear a lot of it has been cut in the past 37 years since I attended. |
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Posted: 1/20/2013 1:22:02 PM EDT
[#8]
The only casting we did at my high school was lost wax casting in art class.
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Posted: 1/20/2013 1:37:07 PM EDT
[#9]
Quoted:
Quoted:
Holy crap! Your HS had a foundry??? We had a band saw... Damn..... You guys had a band saw?
We were lucky to have duct tape available. You were lucky. Ours was in a sewage tent, in the middle of the road. Every day, our shop teacher would wake us up a half hour before we went to sleep, and make us lick the road clean. |
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Posted: 1/20/2013 1:39:07 PM EDT
[#10]
Quoted:
Quoted:
Quoted:
Holy crap! Your HS had a foundry??? We had a band saw... Damn..... You guys had a band saw?
We were lucky to have duct tape available. You were lucky. Ours was in a sewage tent, in the middle of the road. Every day, our shop teacher would wake us up a half hour before we went to sleep, and make us lick the road clean. you guys got to eat? |
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Posted: 1/20/2013 1:39:55 PM EDT
[#11]
Quoted:
The only casting we did at my high school was lost wax casting in art class. We had a casting class in metal shop, but I don't think the teacher really wanted to do it. You had to have the soil/sand/whatever just the right consistency and have the right moisture content. We'd add water, mix it in, and come back the next day to find that it wasn't right. I think we poured one day out of a whole semester. |
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Posted: 1/20/2013 1:40:58 PM EDT
[#12]
Quoted:
Quoted:
Quoted:
Quoted:
Holy crap! Your HS had a foundry??? We had a band saw... Damn..... You guys had a band saw?
We were lucky to have duct tape available. You were lucky. Ours was in a sewage tent, in the middle of the road. Every day, our shop teacher would wake us up a half hour before we went to sleep, and make us lick the road clean. you guys got to eat? 
That and argument clinic were about the best Monty Python ever did. |
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Posted: 1/20/2013 1:44:49 PM EDT
[#13]
Yes a 10/22 receiver. Seemed the easiest route to go for a beginner. The aluminum I used the first time came out too brittle. So I tried again using an aluminum wheel off a Ford pickup. Quality was much better, but by that time I decided I wanted to make a stainless 10/22 receiver so I wouldn't need to bed the barrel, and used the aluminum to make other shit for guns.
ETA, not in high school. Made my own casting furnace a few years ago. |
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Posted: 1/20/2013 1:46:41 PM EDT
[#14]
We had one hell of a foundry class. Kids made maces, car parts, motorcycle parts, etc. We poured at least once a week with aluminum or brass. Can you imagine 16 year olds in asbestos suits pouring molten metal?? It happened.
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Posted: 1/20/2013 2:03:00 PM EDT
[#15]
It's about a thousand times simpler to start with a piece of plate.
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