rapid heat cycle moulding

[PBono]

Good morning, everyone.
Sometimes I hear about rapid heat cycle moulding, a new way of injection molding that is used, for example, in the production of frames of large flat screen televisions.
looking on the internet I saw that the process consists in very warming the mold in the injection phase, then cool it quickly before the extraction piece, in this way you could get very beautiful pieces aesthetically but sopratall without material joint line (this is the thing that would interest me particularly).

I was wondering if someone had heard about it or had already experienced it. what steps should be taken in mould design? it will probably be necessary adequate power stations, perhaps from the cost of an apartment, is it?
I am perplexed above all by the fact that this new method that would seem so "miraculous" is still almost unknown, perhaps has more disadvantages than advantages?

thanks in advance.

 

[PBono]

rapid heat cycle moulding

perhaps it is more known the definition "injection with steam heating".

Does anyone know anything?

 

[Dade73]

pbono hello, I heard about it, the advantages on the final piece are the aesthetic aspect: glossy, no jutures (justly you said), minimal rites post molding, allow me exaggeration of the term, but also amorphous materials become crystalline.
for what I know is used so much with the polyester materials pet pbt....
the disadvantage of this process is a strong energy cost in heating and freezing the mold every cycle. if you need more or more specific info let me know.

 

[PBono]

thank you dade73, I also informed myself by molders and printers of my knowledge and communicated the same things to me.
the technology is promising, however it requires special power units, double special hydraulic system (one for the cooling water, the other for the heating steam, with adequate boiler capable of generating sufficient steam), and especially special mold, with cooling circuit near the printer surface (uniformly close).
for now and for our needs are excessive investments, especially because in our case we already have existing molds that should be relived heavily.
Thank you