What is the difference between plastic injection molding and casting investment?

Plastic injection molding and casting  investment are two ways to make some standard products by models. what are they difference?

It is a chance we learned the casting investment production process last week, it seems the  casting investment process more complicated than the plastic injection molding ones,let's see the difference: 

Plastic injection mold material :

Materials such as polystyrene, nylon, polypropylene and polythene can be used in a process called injection moulding. These are thermoplastics - this means when they are heated and then pressured in a mould they can be formed into different shapes.

Casting Investment process:

Material such as aluminum, steel, copper, and so on, most part be the metal stuff.

We are learned the knowledge in variety styles, as we are professional in the plastic injection molding, but it can help us to recognize the future of industry by knowing more about the almost same industry, automotive precise plastic injection mold and customized injection mould are our strengths, casting investment is not our business, our another craft technical process is progressive stamping die parts manufacturing.

Continuely be leader difficult for any company, only the one persues the aim firmly cab get the station.