Ok
finally i managed to communicate with my teacher...
He asked me to add
1. a cooler method (a drain from where water can pass through)
2. a device that pours the plastic into the mold
3. a device that pushes the object so mold and plastic can be detached when the mold opens.
he also told me that the program walks you through but i didnt see any of these steps when i made the mold
i cant find a tutorial or a guide about these