Here we are explaining plastic cup design.We are also explaining mould of plastic cup for mass production.
Link given below contains Plastic product design for bath mug . I had tried to use simple english to understand plastic parts.
https://youtu.be/lOK1YkarKlo
Link given below will show you how to create mould for externally threaded parts.
https://youtu.be/tb4oWtGxQpo
To understand solidworks mold tools please see video in link given below
https://youtu.be/5JLFxiDuY2Q
Also see video to make mold for tea cup
https://youtu.be/iAAQPvkGHKU
Link given below shows how to create mould for bath mug without side core
https://youtu.be/n3I873Y6pt4
