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 Post subject: Dumont 1120 Clock Radio repair
PostPosted: Sep Mon 27, 2021 8:48 pm 
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Joined: Aug Tue 10, 2021 9:49 pm
Posts: 43
Location: Chesapeake, VA
 I'm restoring a Dumont 1120 clock radio.  Unfortunately all four screw posts have broken away from the cabinet.  I still have the broken posts attached to the screws.  Anyone know a good way to reglue the broken posts back to the cabinet?  Will JB Weld work??


Attachments:
Dumont 1120 9-26-21 broken clock posts 8.JPG
Dumont 1120 9-26-21 broken clock posts 8.JPG [ 717.28 KiB | Viewed 287 times ]
Dumont 1120 9-26-21 clock model 13.JPG
Dumont 1120 9-26-21 clock model 13.JPG [ 841.43 KiB | Viewed 287 times ]
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 Post subject: Re: Dumont 1120 Clock Radio repair
PostPosted: Sep Tue 28, 2021 12:28 am 
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Joined: Dec Thu 10, 2015 7:01 pm
Posts: 545
Location: Aurora, IL
I've had good luck repairing broken pieces like what you show using epoxy glues targeted toward plastics. J-B Weld has a two part epoxy called PlasticWeld. Loctite also has their own version. Their bond is very strong. If possible after gluing squeeze the pieces together with a small spring clamp or use a weight of some sort. If necessary use a piece of wax paper or parchment paper between clamp and glued piece if glue may ooze out of hole in plastic to keep clamp from sticking. Good luck!


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 Post subject: Re: Dumont 1120 Clock Radio repair
PostPosted: Sep Tue 28, 2021 5:53 am 
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Joined: Apr Sun 08, 2007 6:47 am
Posts: 4978
Location: British Columbia
It it's polystyrene plastic acrylic solvent cement from a plastics shop will weld the broken pieces of stud back together, with no clamps, which will result in a stronger bond, and a cleaner repair, then reaching for the J.B Weld, they sell it in some plastics shops. I don't know what it is about J.B but people seem to think it's the thing to reach for repairing anything, when it is not. It's almost as bad as this propensity towards using silicone on speaker cones, which should be left for caulking around the bathtub.
Regards
Arran


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 Post subject: Re: Dumont 1120 Clock Radio repair
PostPosted: Oct Mon 04, 2021 5:16 pm 
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Joined: Dec Sat 24, 2011 9:17 pm
Posts: 8349
Location: Vancouver Island, Canada
Agreed, solvent cement or airplane model glue, the stuff you shouldn't sniff.

The key here is to replace each piece exactly as it was before it snapped.
Those screws don't need to be torqued. It's not a truck wheel or cylinder head.
A firm but gentle touch on the screwdriver will do. :D

_________________
Watch the doughnut, not the hole.
Burl Ives, RIP, oldtimer.
[:l>)


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 Post subject: Re: Dumont 1150 Clock Radio repair
PostPosted: Oct Mon 04, 2021 6:55 pm 
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Joined: Aug Tue 10, 2021 9:49 pm
Posts: 43
Location: Chesapeake, VA
I'm gonna try SCIGRIP 10315 16 Acrylic Plastic Cement. I also just received a Bondic acrylic glue that UV light activated. I will test it out on some old plastic pieces, then give it a shot on at least one post.


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