Plastic saws?

[dynodave]

Some pix of the repair process of the defective ultrasonic welding.
The tank was kerosene washed, isopropol washed, and then industrial strength degreaser washed.
The epoxy was applied around 3/4 of the whole seam.
The hole above and to the front of the bar stud is the sintered brass tank vent.
[photo=medium]4967[/photo]
seam behind flywheel
[photo=medium]4968[/photo]
There was definite holes in this bottom seam with sunlight easily visible when looking in the oil fill hole.
The old defective welded plastic was easily picked away with a dental pick, A slight vacuum was applied to suck some epoxy into the seam.
On the bottom it was walnut shell blasted 3/4" wide stripe for better adhesion.
[photo=medium]4969[/photo]
The tank end cap subassembly, on the right, is slid down compared to main body. Maybe only 20 % overlap on the top and bottom seams where ultrasonic welded. The vertical seams should have been OK.
[photo=medium]4970[/photo]
Looking in the fill hole, you could see several slits of clear sunlight holes at the bottom seam. Light green marker is general outline of entire ultrasonic weld joint.
[photo=medium]4971[/photo]
Now to assemble the saw and give it a try.

Pictures didn't post

Steve

That's strange I can see them?
They are also in my gallery, on my husky page...with the same text

 

[sonny580]

I see them here!-- Firefox browser and win.10! thanks; sonny580

 

[VA 372xp]

I saw a machine sonic welding plastic tanks together at the US Stihl plant a couple years back. Very unusual.
If you get too close to an automated machine, or an automated forklift, it will stop for a bit.
The piston machining robots in an enclosure were cool.
The plastic injection moulding media pellets are run through a vast network of conduits.
The 1.2million sq foot plant tour was something I'll never forget. Very Cool.

Virginia beach ?

 

[s sidewall]

I'm on Tapatalk, maybe y

Steve