flat belt pulley pattern

[dallen]

not much progress today, I did make sure all the bits and pieces are loose on the board, got the molding board secured to the flask and made some core's. There are still two core prints to make in the morning.

The cores were made using a short section of 1.250 Sch 40 PVC pipe as the mold, I turned a couple of sleeves out of a some thick wall round tubing that would just slide into the PVC and cut a 4 degree taper on the inside to taper the ends f the core. the core prints will have the same taper turned on them.

Cores are made with silica sand and sodium silicate, hardened with CO2, the dark spots in the cores is from the Sodium Silicate forming balls in the sand and not evenly distributing thru the sand, plus I still don't have a scale to weight the ingredients.

I used a 1/4 inch rod to put a vent in the cores that goes completely thru the core and will be vented to the open atmosphere to relieve internal pressure not only in the core but the mold as a whole.

hoping to pour this Friday morning, if the foundry gods and mother nature allow it.