maybe you find many many products around you contain plastic parts, for example, handset, telephone, iphone, ipad, ipod, Walkman, DVD player，TV set，HI-FI set，laptop，refrigerator and so on, why our manufacturer use plastic parts on them？because There are numerous reasons why replacing metal parts with plastic makes sense. One of them is to decrease piece part prices
in molding industry, we always say: “A penny saved is a penny earned.” You know, for a mass molding production, we just need to pay an initial tooling cost, then we will get all the parts we need after completing molding process, so the piece part pricing is usually much less than the same part produced in metal, because the injection molding process has faster cycle times (more parts made per machine hour),
for a metal part, it could be a stamping, casting or a die cast part, the cost also can be saved, but in order to get a qualified product, it could contain secondary machining cost.
it depends on the value of your product
but still, please don’t forget the mold cost you paid, But for a new product, that kind of mould can be divided into two types: experimental mold and formal mold
but the quality is not good enough, if a part is made of reworked material
I agree your conclusion, but now 3D printing is coming, I can’t predict when it can replace this molding technology
Yes! this is why we choose plastic material
This topic is easily misleading, Because it has a precondition
The cost of mold also can not be ignored
Premise condition is that your orders are big enough
yes! I agree your opinion at all, We are a professionbal injection molding company
as an industrial designer, sometimes, I don’t think so, because saving Monies is not the whole meaning of a product