Re: Forged vs. ?

"* * Chas" <verktygj...@xxxxxxxxxxxxxxx> wrote:
"Melt forged" was/is a BS term for injection molding, a method for
making high quality castings.

<frkrygow@xxxxxxxxx> wrote
I think you meant die casting, not injection molding. Although the
processes are conceptually very similar, when it's done with metal,
it's called die casting. When it's done with plastic, it's called
injection molding. At least, that's true everywhere I've come across
it.

* * Chas wrote:
I was thinking "die casting" when I wrote "injection molding" in several
messages.

The term injection molding usually refers to the plastics industry but it
can be used to describe the manufacturing processes for both plastic
molding and metal die casting.

http://www.pcc-aft.com/aboutus.htm

I was unfamiliar with the term thixoforming. I ran across the above site
searching on thixoforming. I heard about the process about 10 years ago
when I visited an aluminum mfg. who was making the slugs for the process
but it was called a number of different names. I've never seen the actual
process in use.

No matter how good the results, thixoforming, vacuum casting melt forging
or what ever it's called is still not forging.

Right.
But the greater bulk of our industry's mid to low end equipment is much the better for these processes, gravity castings being pretty much obsolete for aluminum bicycle parts. No one makes an AVA or Pivo cast stem or its equivalent now fortunately! A choice of Record or sand cast is not a reasonable choice for everyone.
(jim beam first introduced me to the the term 'thixoform' here. The SR-Sakae folks all said 'melt-forge')
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
.

Relevant Pages

  • Re: Forged vs. ?
    ... The term injection molding usually refers to the plastics industry but it ... molding and metal die casting. ... I was unfamiliar with the term thixoforming. ...
    (rec.bicycles.tech)
  • Re: Forged vs. ?
    ... I think you meant die casting, not injection molding. ... The term injection molding usually refers to the plastics industry but it ... I was unfamiliar with the term thixoforming. ...
    (rec.bicycles.tech)
  • Re: Toy helicopters
    ... cast bike parts, we see that the shakier your position, the more ... still don't understand the difference between casting and thixoforming ... and you think thixoforming has ... Once again, the weaker your position, the more obnoxious and obscene ...
    (rec.bicycles.tech)
  • Re: Anodizing effect on fatigue life of aluminum alloy
    ... Gary Young wrote: ... are just ridiculous from anyone purporting to be an engineer. ... thixoforming is not casting. ...
    (rec.bicycles.tech)
  • Re: Anodizing effect on fatigue life of aluminum alloy
    ... are just ridiculous from anyone purporting to be an engineer. ... thixoforming is not casting. ... when shown the facts. ...
    (rec.bicycles.tech)