Casting dented and with balls on?

[Hannah Jackson]

Hi,

I have sent some flat pieces off for moulding and casting of my metal master, over half of them have come back with wierd ball things on, is this where there was micro porosity and they have tried to microweld the hole? Some of the balls protrude more than the left over sprue! They are in different places on over 8/12 pieces I ordered. Any idea what I do about it? As my pieces are mainly flat?

I also have looked at one of the pieces I sent off for casting, it was perfectly finished and polished when I sent it off, and I sent them boxed. The casting of this piece has come out with a massive dent in all the pieces, I have checked the metal master they returned and it is NOT dented. I need these pieces to be perfectly flat for use in my engraving machine, I can't use these dented ones, they are a set of three so basically my whole order can't be used unless I can fix it. I made sure they were 100% perfect before sending them off for casting and the returned master is not dented.

I realise castings need to be finished etc, but unless I can work out how to cut off the balls and fix the dents I cant use any of them.

One of them, the heart picture, has a giant hole in too! If you look at the top middle of the heart slightly to the left it can be seen.

Do I have any grounds to ask them to re-do the mould of the dented piece? and how do I fix the 'ball problem' and can I ask them to re-do the one with the hole?

Thanks so much!
Hannah