Plastic welding

Plastic bits and Paint
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tescr500
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Post by tescr500 »

i have a brken ear will have to be done but hopefully go ok fingers crossed and tab on rear unit
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Howie
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Post by Howie »

Hey Howie, seeing as you are now our "Resident plastic welder" can I book my Rayban's in as I broke them in half on my hols
:lol: Sorry I've only just progressed to Oakleys.

This first pic shows a mend to the airbox from my Ke175, the hole was caused by the exhaust burning a hole in it (about the size of a 20p)

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This was done by bridging the hole using the plastic rod. Tack to one side then tack to the other. Once I had covered the hole with the rod, I melted them all together, not pretty but effective.

The next pic shows a repair to my Kx250's airbox

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Once again, not pretty :lol: This was just a split. The plastic on this part of the airbox is very thin, so I'm not going to dress this weld either.

Here's the ear

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This ear has fallen off once but now feels strong. Stronger than the fibre glass repair done by a previous owner. This will need grinding down & filling before repainting. Just need to find a good flexible filler now, any suggestions?

Finally here are some of the stuff you need.....

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I also have spring clips to hold things in place & a dremel type tool to grind back the excess weld.
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500bernie
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Post by 500bernie »

Well done Howie =D> =D> =D>

I feel inspired [-o<
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Howie
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Location: East Yorkshire

Post by Howie »

Best to just get stuck in Bernie.

I practised on a few old crappy fairings first, just to get a feel for it. Then thought 'bugger it' learn from your mistakes & all that.

Obviously I'm no expert regardless of what twostrokesmoker thinks :lol: but I think with more practice I could get a better finish.

I'm not sure what the technical term is but if you 'pool' the plastic (swirl it about with the soldering iron) you seem to get a better 'fix' to the original plastic.

I've got another weld to do on the Ke175's plastic. If I remember I'll do it stage by stage & post the pics on here.
KR-1R
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Plastic welding with Hot Stapler

Post by KR-1R »

.
.
so a month or two back saw on aliexpress Hot Staplers
These have probably been in the bumper repair industry for years :| :oops:
but could increase crack repair strength without requiring full penetration hot air plastic welding skills

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A trimmable wire insert is halfway melted through/into the plastic thickness to lock together the halves of a crack.
The tails of the wire insert is trimmed back and filler applied

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Kits for not much more dollars than traditional solder iron

plenty example videos on youtube

https://youtu.be/1VN6lxdC9LY

https://youtu.be/ig9FAdMZ8Xk

the V shaped hot knife blade is then be used to melt ABS filler rod to fill the crevice left by the insert

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Frunobulax
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Joined: Thu Nov 28, 2019 6:39 am

Re: Plastic welding

Post by Frunobulax »

Thanks for sharing, this looks very easy to use. I'll try this.
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