Pro/Forums - View Single Post

phide · 02-26-2006, 11:16 PM

Thanks for the reply.

I've been tweaking the pin arrangement over the weekend, and I've arrived at (what I believe) will be a better pin arrangement. Channel width has increased slightly - to .4mm. The pins themselves have been somewhat reduced to size (after reading RoboTech's analysis of the Swiftech Apogee) to 1.1mm x 1.1mm (down from 1.4mm). The pins now encompass an area 1.9mm x 1.9mm. It seems I went somewhat "hog wild" when making some corrections to the original design, which is why the pins occupied a seemingly large area. I've also tweaked the size and number of jets to ensure there's water always forcibly striking the area directly above the die, as Cathar said in his findings during the White Water project.

The jets are still something of a gray area for me in terms of what's good and what's not so good. What kind of velocity should I be aiming for, and what pressure drop through the jets would be too high? I've calculated that a single chamfering pass will help alleviate a fair amount of pressure drop, but I'm still somewhat unsure what would be a good range of velocity, though I recall LIG saying something in the 200-300 meters/sec range long ago.

I wish the money flow was good enough to allow me to do a number of prototypes, but at the moment, I only plan on making 2 to 3 complete prototypes, and I need to start defining what variables will change with each 'version'. I'll likely alter pin height for two of them - most likely 2.5mm and 4mm.

02-26-2006, 11:16 PM	#8
phide Cooling Neophyte Join Date: Feb 2006 Location: Los Angeles, CA Posts: 41	Re: Project Block Thanks for the reply. I've been tweaking the pin arrangement over the weekend, and I've arrived at (what I believe) will be a better pin arrangement. Channel width has increased slightly - to .4mm. The pins themselves have been somewhat reduced to size (after reading RoboTech's analysis of the Swiftech Apogee) to 1.1mm x 1.1mm (down from 1.4mm). The pins now encompass an area 1.9mm x 1.9mm. It seems I went somewhat "hog wild" when making some corrections to the original design, which is why the pins occupied a seemingly large area. I've also tweaked the size and number of jets to ensure there's water always forcibly striking the area directly above the die, as Cathar said in his findings during the White Water project. The jets are still something of a gray area for me in terms of what's good and what's not so good. What kind of velocity should I be aiming for, and what pressure drop through the jets would be too high? I've calculated that a single chamfering pass will help alleviate a fair amount of pressure drop, but I'm still somewhat unsure what would be a good range of velocity, though I recall LIG saying something in the 200-300 meters/sec range long ago. I wish the money flow was good enough to allow me to do a number of prototypes, but at the moment, I only plan on making 2 to 3 complete prototypes, and I need to start defining what variables will change with each 'version'. I'll likely alter pin height for two of them - most likely 2.5mm and 4mm.