J
jim beam
Guest
[email protected] wrote:
> On Oct 11, 12:00 am, jim beam <[email protected]> wrote:
>> [email protected] wrote:
>>> On Oct 10, 3:33 pm, Peter Cole <[email protected]> wrote:
>>>> article on aluminum, alloys heat treatmentshttp://www.bikepro.com/products/metals/alum.html
>>> Golly, don't let jim beam see that!
>>> It contains this paragraph:
>>> "The ingots can be remelted to make cast aluminum products, using
>>> various methods of casting including (in the bike industry), die
>>> casting where molten aluminum is injected under high pressure into the
>>> cavity of a metal die. Aluminum alloys have a reasonably low melting
>>> point which makes a dense, fine-grain surface structure with excellent
>>> wear and fatigue properties when die cast. Also permanent mold casting
>>> may be used, which uses a metal mold repeatedly for producing many
>>> castings of the same form. These casting techniques are the way many
>>> crank arms, pedal bodies, hub shells, seatpost head pieces, stems, and
>>> some headset parts are commercially made in volume."
>>> When I said similar things, he switched to full, furious insult
>>> mode.
>>> - Frank Krygowski
>> so that's why you made your mistake? does this paragraph contain the
>> word "thixoforming" or "melt casting"? no? so how could it be that
>> manufacturers actually use those process and not simple "die casting"
>> then? [rhetorical]
>>
>> bottom line, that article is hugely simplified. just because
>> thixoforming and extrusion are not named doesn't mean they don't exist
>> or are not used.
>
> That wasn't what you were claiming at the time, jim. Your argument
> was that bike parts are not cast.
and they're still not cast!!! they're thixoformed.
just because you find something over-simplified to triviality, doesn't
give you, the "engineering professor", a reason to continue propagating
the information omission. especially not in view of a substantial
intervening period in which you should have read a few books and
resolved your lack of information.
> When I produced enough citations
> proving that many are cast, you switched to posting one word insults.
but they weren't cast, they were thixoformed!
>
> But we're talking about rims and extrusions now.
>
based on the above, will you propose isotropic extrusions like peter cole?
> On Oct 11, 12:00 am, jim beam <[email protected]> wrote:
>> [email protected] wrote:
>>> On Oct 10, 3:33 pm, Peter Cole <[email protected]> wrote:
>>>> article on aluminum, alloys heat treatmentshttp://www.bikepro.com/products/metals/alum.html
>>> Golly, don't let jim beam see that!
>>> It contains this paragraph:
>>> "The ingots can be remelted to make cast aluminum products, using
>>> various methods of casting including (in the bike industry), die
>>> casting where molten aluminum is injected under high pressure into the
>>> cavity of a metal die. Aluminum alloys have a reasonably low melting
>>> point which makes a dense, fine-grain surface structure with excellent
>>> wear and fatigue properties when die cast. Also permanent mold casting
>>> may be used, which uses a metal mold repeatedly for producing many
>>> castings of the same form. These casting techniques are the way many
>>> crank arms, pedal bodies, hub shells, seatpost head pieces, stems, and
>>> some headset parts are commercially made in volume."
>>> When I said similar things, he switched to full, furious insult
>>> mode.
>>> - Frank Krygowski
>> so that's why you made your mistake? does this paragraph contain the
>> word "thixoforming" or "melt casting"? no? so how could it be that
>> manufacturers actually use those process and not simple "die casting"
>> then? [rhetorical]
>>
>> bottom line, that article is hugely simplified. just because
>> thixoforming and extrusion are not named doesn't mean they don't exist
>> or are not used.
>
> That wasn't what you were claiming at the time, jim. Your argument
> was that bike parts are not cast.
and they're still not cast!!! they're thixoformed.
just because you find something over-simplified to triviality, doesn't
give you, the "engineering professor", a reason to continue propagating
the information omission. especially not in view of a substantial
intervening period in which you should have read a few books and
resolved your lack of information.
> When I produced enough citations
> proving that many are cast, you switched to posting one word insults.
but they weren't cast, they were thixoformed!
>
> But we're talking about rims and extrusions now.
>
based on the above, will you propose isotropic extrusions like peter cole?