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by roddie Tue May 14, 2024 7:38 pm
Plastic repair
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Plastic repair
Good evening all,
Looking for information on anyone who is restoring broken or warped Cox, Wen Mac models. Considering setting up part of my shop for just this purpose. Looking for info on needed equipment and knowledge that might streamline this process.
Looking for information on anyone who is restoring broken or warped Cox, Wen Mac models. Considering setting up part of my shop for just this purpose. Looking for info on needed equipment and knowledge that might streamline this process.
AV8r- New Member
- Posts : 2
Join date : 2022-02-15
Re: Plastic repair
There are a number of ways to "fix" broken plastic parts. I think Testors Red Glue is the most common. JB Weld, epoxy are also in the mix. Heat guns and Hot Water can be used to reshape or un-warp plastic wings/tails/elevators. If it's been broken BOB ( RSV1cox) has probably fixed it. If you want to do some reading before he jumps in, you can use the "search" function and find a number of good threads try "Plastic" "repair" to see what turns up.
Or, post what you're trying to fix and the remedys will be given.
Here you go: https://www.coxengineforum.com/search?search_keywords=plastic&typerecherche=interne&show_results=topics
Or, post what you're trying to fix and the remedys will be given.
Here you go: https://www.coxengineforum.com/search?search_keywords=plastic&typerecherche=interne&show_results=topics
Marleysky- Top Poster
-
Posts : 3618
Join date : 2014-09-28
Age : 71
Location : Grand Rapids, MI
Re: Plastic repair
My go-to's for plastic and other repairs. But I always find myself going back to common every-day Testors red tube cement. Most effective that I can find for repairing the types of plastic used in model airplanes.
But these get the most use.
Instructions say to "Apply sparingly to one surface, join and let cure for two hours." I do but ensure that all the surface is covered before joining and I don't move it for at least twelve hours or over-night. To join flat surfaces, I use waxed paper laying the recipient piece flat, then coat the mating surface and join angling down to avoid smearing.
No plastic repair is going to be perfect; you just try to make the best of a bad situation.
But these get the most use.
Instructions say to "Apply sparingly to one surface, join and let cure for two hours." I do but ensure that all the surface is covered before joining and I don't move it for at least twelve hours or over-night. To join flat surfaces, I use waxed paper laying the recipient piece flat, then coat the mating surface and join angling down to avoid smearing.
No plastic repair is going to be perfect; you just try to make the best of a bad situation.
rsv1cox- Top Poster
-
Posts : 10647
Join date : 2014-08-18
Location : West Virginia
Re: Plastic repair
You could look up plastic welding on utube if you want to buy some stuff. Just a soldering iron to melt stainless steel screen for reinforcement. Mostly just a soldering iron with a spade/flat tip. Takes a bit of practise and a scrap piece of matching plastic filler sometimes.
aspeed- Platinum Member
- Posts : 790
Join date : 2013-01-18
Location : Leamington Ont. Can.
Temperature controlled soldering iron
Using a temperature controlled soldering iron makes "welding" a lot easier.
For example a "ts100" can be set to temperatures much lower then used for soldering.
Each type of plastic has it own melting temperature and has a range where it is starting to get soft but not yet fully liquid.
What worked for me is to set the iron to 150c , poke a test sample of plastic , increase the temp by 10c and try again until the plastic becomes soft enough to melt th 2 sides of the joint in a controlled way.
Single temperature irons become to hot and that degrades (overheats) the plastic making good "welds" much more dificult.
For example a "ts100" can be set to temperatures much lower then used for soldering.
Each type of plastic has it own melting temperature and has a range where it is starting to get soft but not yet fully liquid.
What worked for me is to set the iron to 150c , poke a test sample of plastic , increase the temp by 10c and try again until the plastic becomes soft enough to melt th 2 sides of the joint in a controlled way.
Single temperature irons become to hot and that degrades (overheats) the plastic making good "welds" much more dificult.
cmulder- Gold Member
- Posts : 279
Join date : 2022-02-10
Re: Plastic repair
I bought one a couple of weeks ago, but I haven't tried it yet. Temperature controlled with a series of tips, a flat angled one looks most promising. I have tried using a soldering iron before with mixed results. They do make a mess restricted to hidden repairs, not really appropriate for something like this.
rsv1cox- Top Poster
-
Posts : 10647
Join date : 2014-08-18
Location : West Virginia
Re: Plastic repair
Good job on the start of the repairs.
NEW222- Top Poster
- Posts : 3892
Join date : 2011-08-13
Age : 45
Location : oakbank, mb
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