Thank you for your detailed answer. I have already asked myself similar questions. I also consider the use of shell elements to be useful.

Unfortunately I haven't done too many analyses yet and I'm not familiar with all functions in Ansys. Personally, I think a coupled field statistics analysis makes sense. Since the mould will not be made of metal but comparable to wood and the times used are negligible (less than 10s for removing and closing the mould), I think this type of analysis should be sufficient, don't you?

What advantages could transient structural or explicit dynamics bring?