Firstly,metal molds are in indusrial production, using various presses and special tools installed on the press, through the  pressure of the metal data to make the required shape of parts or products.

Secondly, plastic moulds are composite, plastic mould used of pressing, extrusion, injection and low foaming moulding.

Thirdly, plastic moulds have a coling system and the metal molds are not.The principle of  the products are also different. Plastic moulds are  cooling  after injection moulding,  the metal molds are the standard thickness of  steel plate  cold backlog molding.