To be able to press apple juice, it is necessary to first grind the apples.
This can be done with an apple grinder. I searched the internet and found inspiration from Matthias Wandel's hand turned apple grinder plans:
The apple grinder is built up from a lot of different parts and can be easily taken apart for cleaning. The grinder is placed on sawhorses with a bucket below which collects the grated apples. Next year I will upgrade the build with an electrical motor since it is quite exhausting to hand turn the grinder for several hours when large quantities of apples need to be grinded. The grinder works very well and I produced 70 liters of apple juice which is now fermenting into hard cider.
See my apple press project here: