Engines > Your Own Design

Oscillator Cylinder Pattern

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CI:
Nice looking patterns !
The beauty of wood patterns is you can cut, sand, carve, add, subtract, etc. indefinitely, and easily.
Trying to modify 3D printed parts can be challenging.
And the reason I like to work with steel to build things is that like wood, you can cut, sand, bend, add, subtract, etc.

I bought a 240 volt heater, and when it is really cold, I will string a piece of Romex (tm) on the ground out to the shed.
Not safe I know, but it works in a pinch.

We have what is considered "cold" weather here today, at 19F.
Normally we don't get below 30F.
I checked the weather at a buddy of mine's place in Ohio, and he was at 9F today.

I have poured aluminum at 30F.
An oil burner operating on diesel works fine with no fuel preheat at 30F.
I put a cardboard box over the mold, and put a 1,500 W hair dryer into one corner, so the mold remained at about 70F.
I flipped the box off at the last second.
I recall there was a significant amount of ice on the ground, so you can't use ice and snow as an excuse to not pour.

I need to get back to doing some pattern work.
So many things get in the way of having fun.
.

vtsteam:
Thanks Sanjay! :cheers:


--- Quote from: CI on December 14, 2025, 10:04:02 PM ---I recall there was a significant amount of ice on the ground, so you can't use ice and snow as an excuse to not pour.

--- End quote ---

@CI I've poured in winter here in Vermont before which is far north of you. I mold outside, my greensand is presently frozen, and as I said I'm going to wait a bit.

CI:
Down here, heat exhaustion is a real problem for much of the year, especially when wearing full leathers, which is why I pour at night.
Frozen sand would be problematic.
.

vtsteam:
I glued the pieces together this evening, but not the trunion piece. It will be easier to fillet the cheek pieces without that in the way.

The hole saw I used to cut the core print pieces was chosen to match the ID of a piece of 1-1/4" PVC water pipe. The reason was to simplify making a core box. The pipe will be split to do that so it can be opened to release the core.

A piece of pipe is shown here, just fitting the core print.

CI:
You can slit the PVC down one side, and pry it open slightly to release the core.
Some peopple cut the PVC in half, and use clamps, but it is much easier to leave it one piece and just slit the side.
You may already be aware of this.
.

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