Author Topic: Plastic Welding our pesky dash cracks  (Read 1051 times)

0 Members and 1 Guest are viewing this topic.

Offline ford-bldr

  • Full Member
  • ***
  • Posts: 83
    • supermoters.net
Plastic Welding our pesky dash cracks
« on: November 12, 2023, 07:47:44 AM »
Came across these vids using materials for reinforcement.

Tried plastic welding before but the material got thinner and the cracks came back.

This could also be used for attaching a backing plate for better mounting locations etc.

https://youtu.be/0YRPMcVJ2D8

https://youtu.be/LetUNViQ4IM

https://youtu.be/xVtw5HTMMAM?t=118


Your milage may vary...

Use stainless materials for our marine environment.

Seems like you would want to squeeze seams together - at least initially - to get a tighter seam...
« Last Edit: November 12, 2023, 08:09:39 AM by ford-bldr »
Seems all my hobbies require Alcohol and Fossil Fuels...

8' Glen-L MiniMaxed Hydro
16' Checkmate Merc 150
22' Pachanga 350 Mag
22' Velocity 350 Mag
28' Velocity 600 hp Merlin block
20' Century Arabian 454 V Drive
17' Laser tunnel hull
16'CV16 Project

https://www.supermotors.net/users/Snakoil

Offline awc105

  • Full Member
  • ***
  • Posts: 124
Re: Plastic Welding our pesky dash cracks
« Reply #1 on: November 12, 2023, 02:41:36 PM »
For what it's worth, when I was repairing cracks in the dash of my CV16 I used some ABS pipe cement (https://www.homedepot.com/p/Oatey-8-oz-Medium-Black-ABS-Cement-308893/100345366)

I drilled a hole at each end of the crack to stop it from spreading, then cut a groove into the crack with a ball end stone on my dremel. I filled the groove with the ABS cement, I also applied it to the surface behind the crack. I bought a sheet of 1/16" black ABS off of amazon

(https://www.amazon.com/Install-Bay-ABS116-Universal-16-Inch/dp/B0049MWXM8/ref=sr_1_3?crid=1PCAQR6TJSZI0&keywords=abs%2Bsheet%2B1%2F16&qid=1699821633&sprefix=abs%2Bsheet%2B%2Caps%2C105&sr=8-3&th=1)

and cut it into strips that were then applied behind the crack to stiffen it. Since the ABS cement has a solvent in it, it actually melts the material together to form a sort of plastic "weld"

Once, the cement cured, I went back and sanded it smooth :)

Since ABS is a basic thermoplastic, it is fairly easy for it to be re-welded and bond to itself to make a durable repair.

-Andrew
« Last Edit: November 12, 2023, 02:46:00 PM by awc105 »
Andrew
74' CV-16SS - Carla

Offline Hyperacme

  • Administrator
  • Hero Member
  • *****
  • Posts: 13335
Re: Plastic Welding our pesky dash cracks
« Reply #2 on: November 12, 2023, 05:58:06 PM »
I added this to your other thread ..

http://forum.cgoamn.com/index.php?topic=8342.0