Hi, I知 new in the forum.

Recently I got a new Toyo SI-6 180, I知 using the machine to mould IML containers, after a few months of using the machine it started to make a loud noise when mould opens.

Mould details: 2 cavity with hot runners.

I dismounted the mould, mount it again, double checked the clamps adjustment, send the mould to a mould maker to check for abnormal wear, cracks or anything and found nothing wrong.
Has anyone experienced something similar?
How you solved?
Nice to meet you all and Thank you in advance for any help!