Will liquid plastic cements, such as Testers, work on Delrin (Flexible plastic) plastic parts? Want to glue Delrin MU hoses to an Atlas RSD4.
RicZ
No, it won’t.
I haven’t tried it, but this might be the thing to use:
http://www.loctiteproducts.com/p/sg_plstc/overview/Loctite-Plastics-Bonding-System.htm
Ed
Ed,
I’ve never heard of this stuff and it looks interesting. Although I’m not glueing delrin it might work for another project I’m working on…thanks for the info.
Wayne
Acetal/ engineering plastics such as Delrin are not designed for particular use with adhesives, particularly as their chemical formulation results in properties such as being “self-lubricating”, which is why they are used for parts in industrial applications, such as automobile parts, where high use and durability are required. One can drill Delrin of sufficient thickness for use with mechanical fastening systems (bolts, screws, etc), but that is not practical in HO.
As such, any gluing process generally requires scoring or abrading the Delrin to obtain a more coarse surface where “tooth” may aid in adhesion, but this is a bit too much for small parts. Even a “tension fit” may be doubtful, given the surface texture of Delrin.
Why these parts are being made from Delrin is not too clear to me. I would suggest finding an alternately- made part of a material that is more commonly workable, such as styrene plastic.
Cedarwoodron
Have you considered melting the mounting posts from the inside of the shell? Drill hole, insert mu hose and melt on the inside with soldering iron.
It has 2 advantages over glueing.
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No overglueing is possible.
-
Part will rotate in hole, and hence, is re-positionable.
David B
Hi!
Info (website direction) I got from my post on ACC sneezing reaction, is that Loctite was developed from ACC, so it may well be the same thing.
I’m fixin (been in Texas 33 years) to put the detail parts on two Stewart switchers, and it appears they are made of Delrin as other Stewart detail parts are. Those I applied before (F units truck details) pushed in place and have held exceptionally well.
That being said, I’m a bit leery of attaching those parts…
I just ordered some Poly-Zap to glue some Delrin parts together. Someone at another site said they used it to glue some Delrin handrails together and it worked great. I bought a 1/2 oz bottle on ebay for $4 plus $2 and some odd cents shipping. I understand it is a type of ACC but bonds Delrin.
Also, folks, I picked up a spray can of Polypropylene Clear Primer at my local Napa store (part number 7223.) This had been talked about here before. You spray it on and then paint a flexible paint of your choice over it. Some folks call this Rubber Bumper Primer. I keep thinking of that Rubber Baby Bumper tongue twister when I say or write that.
I keep thinkin’ there’s another Delrin bonder out there. I probably have the print-out around here somewhere. When I saw it, I thought it was pretty useful. Anyway, this might be it:
http://www.reltekllc.com/adhesives-for-delrin.htm
It says it bonds Delrin to Delrin, something the Loctite stuff doesn’t specifically say.
Ed
This stuff, from CoolChem, is supposed to be made especially for engineering plastics.
Wayne
There is some interesting information on this in this thread.
I’ve been using Cypox from CoolChem (see link above) for severl years now. It really does work. I have glued broken handrails back together, added details (styrene, brass, resin) to Delrin sideframes, etc. I even glued a broken Delrin drive shaft back together and the loco is running just fine after 3 years! The Cypox glues Delrin (Celcon) together as if they were one piece. It ain’t cheap though, the starter kit is about $20, which includes the Cypox, plastic prep, accelerator and debonder. It does also work as a regular CA.
For attaching handrails to loco bodies, CA can be used, however it doesn’t really “glue” the mounting pins in the holes, but rather creates a tight friction fit when the CA sets. For this purpose, it’s best to use a medium thickness CA.
When I built 9 of the Caboose Industries Hi Level Switch Stands a few years back, they were made of Delrin plastic. I used JB Quik Weld, a 2-part epoxy, to bind the parts together.’
Rich
"Dr Mikes "- has a website or available fro Walthers.
Folks. I have had a chance to try the Poly Zap. I have mixed results as am gluing delrin number plates to delrin armstrong switch levers. On some levers it worked great and and the plates are holding very well. On others levers, the plates did not hold. I am not sure why that is unless not all the surfaces were clean. It does appear that you have to push really hard and hold the two pieces together and it takes a while for it to bond. I will need to find a way to clamp the two pieces together while setting, as I was using my fingers and might have moved the parts before they set.