Here's the build thread for my molding rig. My New Lost Foam Casting Rig | The Home Foundry I started with one GT-25 on the bottom and four G8s...
It's such a broad generalization because there are such a large variety of binding resins. Binders can range from professional materials like...
If you are just blowing CO2 from the surface with your mig torch that isn’t enough penetration. You need a needle/lance that you can insert into...
I don’t think the cracking would be a problem for single use but am not a fan of their mass or shape. I’ve seen his videos. I would have tried to...
Just need to experiment until you get the strength you need. Very dependent upon SS grade and grain size. If your CO2 is welding gas 75/25%, that...
Welcome NJ, Would like to see some pictures of you engine castings. A 400 cc v8 sounds interesting too Best, Kelly
That flaw is from the sand being displaced (“a leaker”). That is caused by either insufficiently packed sand, insufficient height of sand mold...
K-bond is also an option. Mixing up K-Bond Sand (Similar to Petrobond) | The Home Foundry Best, Kelly
Yes, here in the US is the similar. In fact, the first coat is usually used with a fiber/paper tape and is "setting" type compound, meaning it...
I took a spin back through this thread from the beginning. It's worth doing for anyone that is a serious lost foam caster and considering making a...
It can/will depend on the grade of SS and mesh size of your sand, but the criticality of this is to achieve core strength that is strong enough to...
It's probably a statement of the obvious, but don't plan on multiple pours using the same molding sand without allowing it thouroughly cool...
Not familiar with it. What is the density? If you have sodium silicate (water glass), you can use that as a binder for plain sand and cure with...
Practice can only help. The more massive and conductive the cup material, the more heat it will steal from the melt.....especially the early...
Not sure what that means but your coated pattern looks very good. Yes, in most cases the sand will become hot enough to melt the plastic. The...
Close enough.....just go with it. You may already intend to do so, but I would extend the runner to and slightly past bottom of th epattern and...
It's a similar issue I encounter in lost foam casting and preferential positioning in the mold to avoid this is always part of my gating and feed...
Price disparity seems similar in all commercial production versus hobby duty tooling. Most of the time you get what you pay for. I saw similarly...
I did a quick and dirty test with and exacto blade but in gasket stock, they were so fragile the point on the tip breaks almost instantly before...
Thanks Brett, Lot's of good info in that response. Your prior comment about always charging the crucible hot is what piqued my...
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