What is single Daylight and multi daylight Mould|plastic mould

Simple two plate mould are the single Daylight and if mould open from 2 side by use of length bolt is known as milti daylight Mould. This video consist
1) double Daylight mould
2) tripple Daylight mould

Daylight mould,What is Daylight mould,Stripper plate mould,Double Daylight mould,2 plate mould,3 plate mould,