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03-27-2009, 12:10 AM
| #1 |
| Pebble Pounder Join Date: Jun 2007 Location: Tyler, Texas
Posts: 104
|  Delrin in resin form?
I've done a little research on this but haven't come up with much. I'm pretty sure that delrin starts as a resin or liquid form that's injection molded but any ideas on how and where to buy it? Since it seems like delrin moa housings are not coming anytime soon I was thinking of trying to coat the undrsides of the axles with delrin somehow. In the meantime, I did find a two part automotive panel bonding resin called 8115 that I'm testing on my berg axles now that seems to be holding up great and is slicker on the rocks than aluminum and hasn't chipped or cracked off after several hours of abuse if y'all want to check that out. Any help would be appreciated about the delrin though. Thanks everyone. Pariah |
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03-27-2009, 01:08 AM
| #2 |
| Rock Stacker Join Date: Feb 2008 Location: Bay Area
Posts: 94
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From what ive read acetal (delrin) has to be machined into form and cannot be injection molded. Somebody correct me if im wrong  |
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03-27-2009, 04:19 AM
| #3 |
| RCC Addict Join Date: Jul 2008 Location: Sin City
Posts: 1,332
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I'm no chemist but i believe it hardens after mixing all the chemicals together and then is machined. I tried melting some down once to coat an axle and it just ran off and wouldnt bond so ill save you that step.
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03-27-2009, 08:05 AM
| #4 |
| I wanna be Dave  Join Date: Jan 2004 Location: Detroit
Posts: 3,583
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You can mold Delrin...how do you think sheets are made? It's cast by melting pellets and then sheeted. Acetal is often used in many parts in your cars...you'd be shocked how many acetal parts there are. Tend to be small and high use parts since acetal is strong and naturally lubricating. Remember Delrin is a name...however there are 100's of grades of acetal, some more like delrin than others. |
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03-27-2009, 08:22 AM
| #5 |
| Quarry Creeper   Join Date: Feb 2009 Location: Warwick
Posts: 281
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How the resin is formed I can't say but I've never heard of Delrin in liquid form other that when it melts. It doesn't have a solvent that I know of that allows you to recover the material with all it's properties once the solvent has evaporated. It's available in pellet form from a number of plastic resin suppliers, that's what it's molded from. There are tons of injection molded Delrin parts... It's tricky to process as it melts at about 375F and starts to degrade at about 480F so you've got to control the temp while attempting to melt it. I think it's molded at about 425... Dupont has an online molding guide that gives a lot of this info, I've worked with a molding company that processed a bunch of Delrin....
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03-27-2009, 10:15 AM
| #6 | |
| Newbie Join Date: Feb 2009 Location: Edinburgh, Scotland. United Kingdom
Posts: 12
| Quote:
Pretty much hit the nail on the head there. Delrin is owned by Dupont Engineering Polymers and is the trademark name for their Acetal Homopolymer (POM). There are almost 80,000 chemical variations owned by numerous manufacturers. | |
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03-27-2009, 06:58 PM
| #7 |
| Pebble Pounder Join Date: Jun 2007 Location: Tyler, Texas
Posts: 104
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Thanks guys. That's about what I had got out of my research. Just thought with all the different types of resins out there that that are tough and machinable, that possibly delrin/acetal might be born from some type of resin as well. I'll find something that works just as good and get back to ya.
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