It is currently Wed Jun 20, 2018 11:02 am


Removing plastic

Learn and share abrasive & texturing finishing techniques, experiences, and product knowledge here.
Posts: 42
Joined: Fri Oct 17, 2014 10:35 pm

Removing plastic

Postby Johnnybravo » Tue May 22, 2018 2:55 pm

Greetings all, it's been a while since I posted in here since I don't have my shop back up and running after moving.

But I need some help if anyone can help me out here.
I work at a really cool company that makes an astounding product, but because of the NDA's I cannot really say where. But I have a situation I would like to remedy. We routinely have components that get a plastic coating glued onto them, (said components are made of a thin gauge mild steel). Occasionally, the plastic is not in perfect position when the adhesive cures, and portions of it have to be removed. It is a ridiculously painstaking process and adds a great deal of time to the process.

Currently, the way the plastic is removed is by inserting a bamboo skewer into a Dremel, and melting a parting line through the length of the plastic so that it can be removed. This by itself is quite a process because all they are doing is melting the plastic, and they have to change the skewer quite often. But after that, there is still a very effective two part adhesive to remove form the thin steel, but we cannot damage the steel, or we scrap an expensive component.

Does anyone have any ideas about removing this stuff without damaging the component, and without having to wear it off with a bamboo skewer?

Thanks all

Posts: 273
Joined: Thu Nov 19, 2015 10:02 pm

Re: Removing plastic

Postby djreiswig » Tue May 22, 2018 6:58 pm

Maybe soda blasting?
2014 Bulltear (StarLab) 4x8
C&CNC EtherCut
Mach3, SheetCam, Draftsight
Hypertherm PM65
Oxy/Acetylene Flame Torch
Pneumatic Plate Marker, Ohmic, 10 inch Rotary Chuck (in progress)

User avatar
Elite Contributing Member
Elite Contributing Member
Posts: 3011
Joined: Sat Jun 02, 2012 6:04 pm
Location: Pensacola, Fla

Re: Removing plastic

Postby acourtjester » Tue May 22, 2018 9:07 pm

have you tried auto brake fluid, it eats paint like mad no damage to metal.
DIY 4X4 Plasma/Router Table
CandCNC DTHC-IV & Feather Touch
Hypertherm PM65 Machine Torch
Drag Knife and Scribe
Miller Mig welder
13" metal lathe
Small Mill
Everlast PM 256 tig

User avatar
Elite Contributing Member
Elite Contributing Member
Posts: 1613
Joined: Wed Aug 29, 2012 5:17 pm

Re: Removing plastic

Postby Gamelord » Tue May 22, 2018 10:41 pm

Use some 3M heavy duty clear packaging tape around the edges of the metal. When the plastic goops over the edge it is on the tape which can be easily removed. When I do plastic welding I do the same thing and it stops plastic from bonding to itself. Also works for epoxy and other adhesives. With plastic welding, I wait till the weld-on begins to set up, then run a razor blade over the edge, cutting it from the main adhesive area. Then when it sets up firm, peel the tape off and the plastic comes off with it.
Once you take flight, your eyes will forever be turned to the sky." "Lack of appreciation is the worlds biggest crime."

Torchmate 6x14 w/THC Downdraft
Thermal Dynamics Cutmaster 101
Corel Draw / Adobe Illustrator
Torchmate CAD

Posts: 42
Joined: Fri Oct 17, 2014 10:35 pm

Re: Removing plastic

Postby Johnnybravo » Tue May 22, 2018 11:57 pm

Damn. All this ideas are great, but because of the process, I cannot use them. FML

SegoMan DeSigns
Posts: 61
Joined: Sat Jan 06, 2018 4:45 pm

Re: Removing plastic

Postby SegoMan DeSigns » Wed May 23, 2018 12:27 pm

Place several wraps of a small wire on the object prior to coating leaving the pull end exposed.

User avatar
Elite Contributing Member
Elite Contributing Member
Posts: 148
Joined: Tue Feb 23, 2010 4:17 pm

Re: Removing plastic

Postby Francisco » Wed May 23, 2018 2:43 pm

Can you apply heat with a hot air gun? Most adhesives will let go at reasonable temperatures.

Posts: 27
Joined: Fri Feb 17, 2017 4:12 pm

Re: Removing plastic

Postby Tautog13 » Wed May 23, 2018 6:17 pm

Hot wire (Nichrome wire).......similar to how foam is cut for hobbies?

Posts: 42
Joined: Fri Oct 17, 2014 10:35 pm

Re: Removing plastic

Postby Johnnybravo » Thu May 24, 2018 11:25 am

I think heat might be viable. Thank you folks!

Return to “Abrasive & Texturing”

Who is online

Users browsing this forum: No registered users and 1 guest

Easyscriber engrave attachment for Hypertherm torch's