How is this (Heatsink) Manufactured?
How is this (Heatsink) Manufactured?
(OP)
See attached image:
There seems to be little to no draft on the pins which leads me to believe it is not a die casting process.
Is it a post mold welding process?
Can anyone enlighten me?
There seems to be little to no draft on the pins which leads me to believe it is not a die casting process.
Is it a post mold welding process?
Can anyone enlighten me?





RE: How is this (Heatsink) Manufactured?
http:
Any particular reason why you want to know?
RE: How is this (Heatsink) Manufactured?
I read a bunch about it earlier, and they said they use a heated die (almost the same as the aluminum insert) and then high pressure to produce near 0 draft parts.
Impressive designs, better surface areas.
We have been seeing competitors using similar products and I want to be competative or otherwise tell my boss why we should not use that technology.
RE: How is this (Heatsink) Manufactured?
RE: How is this (Heatsink) Manufactured?
How big is that thing?
It could be an investment casting. There are people out there who investment cast heat sinks similar to yours. Most of the ones I have seen have plates on either side with the pins in between. Your part is relatively simple.
RE: How is this (Heatsink) Manufactured?
we are looking for serial production - X00,000 parts / year.
investment casting is not cheap enough at our rate.
the key to this heatsink is the lack of draft. This creates a much denser possible pin spacing.
We design heatsinks to be used with our motor controller products. Outsorce the designs to casting suppliers.
Thanks guys.
RE: How is this (Heatsink) Manufactured?
RE: How is this (Heatsink) Manufactured?
Thanks for the detailed theory.
What is the counter pressure you spoke of?
Is it like the pin tips get pushed into the outter mold so that they become 0 draft? (shortening the depth of the pin to raise the pressure)
RE: How is this (Heatsink) Manufactured?
The counter pressure is applied by a tool within the die at the same time as the punch is pressing on the material (see attached image). The counter force is lower than the punch force, thus resulting in a net forward extrusion. Google "Osakada extrusion counter pressure" and you will find a lot of research by the Japanese researcher Kozo Osakada on this subject.
RE: How is this (Heatsink) Manufactured?
http://www.microcooling.com/
RE: How is this (Heatsink) Manufactured?
RE: How is this (Heatsink) Manufactured?
RE: How is this (Heatsink) Manufactured?
http
I clicked on the link for the company that was profiled in the article (SPX Contech), but it seems to be held by a cyber-squatting firm and a press release from SPX says Contech was sold off.
http://in
I don't know how you would get in contact with these guys besides trying the phone number in the Machine Design article or doing a little investigation, but their process may be what you're looking for.
Engineering is not the science behind building. It is the science behind not building.
RE: How is this (Heatsink) Manufactured?
The pins are separate parts, probably extruded rod. Look at the ends, they're just nastily cut to length with a hack saw.
Line up your pins, dump some sand around them, leave some amount of end protruding into the cavity for the body.
Pour in your molten whatever.
Everything fuses together and solidifies.
RE: How is this (Heatsink) Manufactured?
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If we learn from our mistakes I'm getting a great education!
RE: How is this (Heatsink) Manufactured?
RE: How is this (Heatsink) Manufactured?
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?