What is a heat sink in the annealing process

[crashlanding]

I've googled searched it and the term seems to only apply to electronics but I see the term used in all searches of annealing rifle brass. Is it a heat shield or is it dispersing heat, then the question is how? In my mind it would seem to be a heat trap. Does the sink need to be making contact with the brass or can it basically float around the base of the case. I'm experimenting and this is something that probably has a simple explanation but I can't seem to wrap my head around it

 

[Dmagna]

A heat sink takes heat away from the source, like a cooling block on a CPU or water through an engine block. The heat sink is the brass, you are heating brass to a specific temp then letting it cool. You could use a heat sink to cool it down faster such as water or a cold surface. In terms of using liquid I guess it would be more of a quench at that point.

 

[asd9055]

I've googled searched it and the term seems to only apply to electronics but I see the term used in all searches of annealing rifle brass. Is it a heat shield or is it dispersing heat, then the question is how? In my mind it would seem to be a heat trap. Does the sink need to be making contact with the brass or can it basically float around the base of the case. I'm experimenting and this is something that probably has a simple explanation but I can't seem to wrap my head around it

Not an expet at all, but the only time I have seen a "heat sink" in annealing is for induction annelaers. The induction coil is typically made of copper tubing and you pump a liquid like "antifreeze" through it to keep it cool. Also the ZVS board

 

[PddPdd]

I've googled searched it and the term seems to only apply to electronics but I see the term used in all searches of annealing rifle brass. Is it a heat shield or is it dispersing heat, then the question is how? In my mind it would seem to be a heat trap. Does the sink need to be making contact with the brass or can it basically float around the base of the case. I'm experimenting and this is something that probably has a simple explanation but I can't seem to wrap my head around it

Can you provide the verbiage so we can see the context of how "heat sink" is being used with regard to annealing?

 

[crashlanding]

When someone is using a socket or pipe to hold the brass, they refer to it as if it's a heat sink, this is the part that throws me.

 

[moses42ak]

Think of it as anything that can absorb "excess" heat from the brass. If you are using a mandrel (or socket) to anneal with, the mandrel absorbs extra heat from the brass.

 

[Dr. Vette]

When someone is using a socket or pipe to hold the brass, they refer to it as if it's a heat sink, this is the part that throws me.

They can call it whatever they want, but that does not mean it IS a heat sink or that they have any clue what they're talking about.

You don't need a heat sink for annealing, and you don't need to quench them.

 

[crashlanding]

• Table Top and Index Plate are made from aluminum and are fan cooled by a 50 Cubic Feet per Minute Fan Unit.. They will not heat up significantly during use! No plastic to bow or warp. Table acts as a heat sink to maintain hardness in the cartridge case head. This paragraph applies to the bench source annealing machine copied from graf's web site

 

[PddPdd]

As Dr. Vette pointed out, the heat sink needs to have two things to work: 1) adequate physical contact with the item it is removing heat from and 2) the material in contact needs to have good thermal conductivity. (i.e. copper or similar good thermal conductive material).

Annealers in general should not be adding enough heat to affect anything other than the neck and shoulder area of the brass. So a good heat sink feature is probably not a necessity unless the heat is not being applied in a controlled way.

 

[asd9055]

• Table Top and Index Plate are made from aluminum and are fan cooled by a 50 Cubic Feet per Minute Fan Unit.. They will not heat up significantly during use! No plastic to bow or warp. Table acts as a heat sink to maintain hardness in the cartridge case head. This paragraph applies to the bench source annealing machine copied from graf's web site

I think this is just a "sales pitch". Just MHO

 

[Coyote Shadow Tracker]

Just purchase an AMP!

 

[crashlanding]

Just purchase an AMP!

I'm experimenting

 

[RB II]

Socket or pipe (with the brass inserted in it) would be a "heat sink" of sorts in that it isolates/insulates/shields the remainder of the brass below the shoulder from the heat source. Doesn't technically remove heat from the source however.

 

[jraulsten]

A "heat sink" is simply a heat exchanger that transfers heat generated to a medium such as water, air, etc.