What makes heavier BBs?

MadMax · March 17th, 2006, 20:09

Well then you have access to material tables. IRC, there is not a huge range in density in pure solid plastics (not gas, or filled with mineral or metallic fillers). SG typically ranges between 0.8 and 1.6 for most plastics. IRC the densest plastic I've encountered is teflon which is roughly twice as dense as water (SG 2).

Still pretty far off of a SG of 3.8. There's some metallic filler involved I'm pretty sure.

Plastic in a molten state is quite compressible (well not like water anyways). Still it's hard to hit the density of the solid state in the liquid state (esp for crystalline plastics). It appears that a high injection pressure results in reduced shrinkage during solidification, but I don't think that you can get very high gains in solid density. If you mould at low pressure, you get alot of shrinkage during the phase change so the final solid denisity isn't too far from moulding at high pressure. HP moulding lets you cram in more plastic and acheive less shrinking during cooling.

ex · March 17th, 2006, 20:15

Ahhh Great...why am I starting to itch.....damn post AS syndrome I guess.

Gryphon · March 17th, 2006, 21:12

Hey no worries, not looking to argue!

Just wanted to show, in Dracheous' defense, that are indeed non-magnetic steels available and they could conceivably be used as filler material.

Home	Forums	Register	Gallery	FAQ	Calendar
Retailers	Community	News/Info	International Retailers	IRC	Today's Posts

British Columbia	Alberta
BCAC	EAR
Op-For	JOC
Northern Arms Airsoft	Skunkworx Airsoft
Airsoft Kelowna	RAAT
Prince George Airsoft	Manitoba
Saskatchewan	MAA
SK Airsoft	Ontario
PDW	Airsoft Ottawa
South Sask Mercs	Snow Dragons
Quebec	1st Ranger Platoon
PQAC	Wolfpack Tactical
1st Pathfinders Regiment	TTAC3
Quebec Airsoft
MTX Airsoft	Atlantic
FAQc	Atlantic Airsoft

March 17th, 2006, 20:09	#16
MadMax Delierious Designer of Dastardly Detonations Trader rating Join Date: Dec 2001 Location: in the dark recesses of some metal chip filled machine shop	Well then you have access to material tables. IRC, there is not a huge range in density in pure solid plastics (not gas, or filled with mineral or metallic fillers). SG typically ranges between 0.8 and 1.6 for most plastics. IRC the densest plastic I've encountered is teflon which is roughly twice as dense as water (SG 2). Still pretty far off of a SG of 3.8. There's some metallic filler involved I'm pretty sure. Plastic in a molten state is quite compressible (well not like water anyways). Still it's hard to hit the density of the solid state in the liquid state (esp for crystalline plastics). It appears that a high injection pressure results in reduced shrinkage during solidification, but I don't think that you can get very high gains in solid density. If you mould at low pressure, you get alot of shrinkage during the phase change so the final solid denisity isn't too far from moulding at high pressure. HP moulding lets you cram in more plastic and acheive less shrinking during cooling. __________________ Want nearly free GBB gas?

March 17th, 2006, 20:15	#17
ex Wanna buy some Nod's? #StolenValour Trader rating Join Date: Aug 2005 Location: Ottawa	Ahhh Great...why am I starting to itch.....damn post AS syndrome I guess. __________________ ΜΟΛΩΝ ΛΑΒΕ

March 17th, 2006, 21:12	#18
Gryphon Trader rating Join Date: Mar 2005 Location: MB	Hey no worries, not looking to argue! Just wanted to show, in Dracheous' defense, that are indeed non-magnetic steels available and they could conceivably be used as filler material.

What makes heavier BBs?

General