Milling 6 Unit Lowers

[Car 54]

May I get your help, please?

When you all mill 6 unit lower anterior cases, do you put sprues on every unit, or can I skip every other one and just do 2 on the abutments?
Can it cause any milling stress fit issues in doing it that way? I understand a longer sinter program with slow temp rates up and down will help
maintain fit accuracy. Just wanted do get your thoughts on if this is okay.

 

[user name]

Youre good to go.

 

[Car 54]

Thanks, Bob. Will do.

 

[zero_zero]

I'd remove the sprue on #32 (or 23 if you like) and move the brigde closer to the other unit in the puck. Don't worry about stress...

 

[Car 54]

I'd remove the sprue on #32 (or 23 if you like) and move the brigde closer to the other unit in the puck. Don't worry about stress...

Those 2 sprues look a little to crowded? Yep, I can move that over a bit more, good call.

I do keep it away from the edge just a bit more than normal, as Beyond uses plastic collars that the zirconia puck is glued to.
If I get it to close to the edge, it chatters when it hits that gap, and I've lost or broken units from that happening.

 

[Car 54]

Thanks for the quick replies and help, as I wanted to get this milled and sintering tonight. I appreciate, guys

 

[zero_zero]

If I get it to close to the edge, it chatters when it hits that gap, and I've lost or broken units from that happening.

It might be a clamping issue I think, we use plastic rimmed pucks as well and it never happened so far. Haven't tried Beyond, tho...

 

[Car 54]

Beyond's glue can be kinda sporadic around the disc, with some thin and blank spots here and there where it can be a issue.
Maybe because it's also on the outside edge of a C clamp that makes it more susceptible for me? Maybe if I was on the inside
edge against the C clamp may be more of a dampener, have a dampening effect?

 

[zero_zero]

It's the C-clamp, no support leads to more vibrations.

 

[Car 54]

Makes sense. I really hadn't thought about it in that way until you mentioned the clamp itself.

 

[Car 54]

By the way, thanks for all the helpful advice. The bridge went well and fit well.
I ran it on a slower program, 9 hour, just to make sure it wouldn't be heating and cooling to quickly.

 

[CoolHandLuke]

thanks for the follow up. wish you took pics

 

[Car 54]

I thought about it, but I was running behind on the case when I posted this thread.
Maybe next time