Rosin Hash is the result of heat and pressure applied simultaneously. If you’re using a rosin press, you would generally start by placing your flower, sift, or hash into filter bags. Then you would place the material between the two metal plates.
The plates are then heated and pressed together with several tons of force. The resin separates from the plant material and is squeezed out from between the plates, after which it’s collected onto parchment paper in most cases.
The basic physics are the same no matter what type of rosin press you use. However, the amount of necessary human intervention will depend on the machine.