Cincinnati Shaper

[F.C.]

Here's a shorter version of what I was trying to get at in my narrative.

[dallen]

Frank sorry for taken so long to get back to you.
Yes the shrink bob probably did cause some turbulance in the flow but nothing that showed up in the actually part.
I did vent the top of the mold with a wire you can see on the left side of the part where the metal started to flow back up the vents cause I got them wire too close to the pattern, I just didn't have a bunch of them in that one area on top of the part.

the back end of the part where you have your blue pitchfork the core sticks out about 2 inches into the core print where I had a 3/8 inch vent to the open air.

that black spot hiding under the yellow line is also where I think I got the vent wire a little close to the pattern when I vented it.

I'm not happy with the part but if I can get a keyway in it I'm will use it unless the spot causes problems that can't be solved by welding out filling with metal putty.

one other thing is I probably poured it too hot from the color of the aluminum.
If I have to pour another part I still have the PM with all the info you sent to try. may have to make a new core pattern thou.

DA

[F.C.]

the back end of the part where you have your blue pitchfork the core sticks out about 2 inches into the core print where I had a 3/8 inch vent to the open air.

That core doesn't seem to be the cause of the gas inclusions. Lack of the mold cavity's ability to vent through a riser at the opposite end of the flow probably caused the majority of the inclusions you got. Live and learn... that's what this business is all about. The trick is to get your head around what's termed as "directional solidification" and get a full grasp on what happens inside a mold cavity when metal is introduced. The trick to guaranteed products with each cast is dependant upon what you do to accommodate the metal entering the mold and allowing pressures and gasses to escape. I always cast "THRU" all my gating, risers included, leaving the cast product chilled in the middle. The only time you can cast directly into a cavity with no means of flow through ventillation is in injection casting or casting with a centerfuge. In both cases metal is introduced under pressure and rammed, as it were, into the cavity forcing the gasses back out the direction the metal entered the mold. All I can do for ya is read what i see in the casts you produce... another skill critical to learn in order to analyze what caused defects in what you produce. Hang in there... cast enough metal and eventually you'll come about and find ways on your own to minimize the defects.

[dallen]

I received a drip oiler the other from a friend of mine so now I have one to use as a pattern to make a couple of them to put on top of the shaper to oil the Ram with, which will be in keeping with the original setup of the machine. Sure wish I could figure out the design of the ratchet but it looks like I'm stuck with this one that I have been working on. The photos that I received don't match my leadscrew shaft.

DA

[dallen]

had a belt made for the shaper today, I made a short video of it running with the electric motor I'll upload it tomorrow for everyones entertainment.
I need to have about and 1.5 inches cut off and a new splice added. The belt started slipping when trying to take cuts over 25 thousands deep.

DA

[dallen]

here's the little bit of video that I did yesterday with the shaper running on the new pulley on the transmission, belt's a little on the long side going to have about 1.5 inches shorter.

[dallen]

started work on a couple drip oilers to go on the Ram. Had a Friend that was kind enough to loan me one to copy so I'm not totally working in the dark on how they are made. anyone know where I can get some glass tubing say 1.5 or 2.0 inches outside diameter to make the oil body out of, need about 4 inches if I don't break it when cutting to length.

[F.C.]

Check with lab supply sources. That would be my best guess.

[dallen]

found a source of glass tubing in lengths that I don't have to cut, just need to find enough stuff to meet the minimum order, so I'm covered on what to do about the bodies, now to just make all the rest of the parts.

[mite5255]

[quote="dallen"]here's the little bit of video that I did yesterday with the shaper running on the new pulley on the transmission, belt's a little on the long side going to have about 1.5 inches shorter.

Thats coming along real well Dave

Mike