Continuous ultrasonic welding without anvil
Continuous ultrasonic welding without anvil
(OP)
Hello all, I'm Max and this is my first post in this forum.
I'm having my first experiences in ultrasonic welding. My need is to weld an ABS (or PVC or PP) band on another thick piece of plastic, so that I can't use an anvil. Being the band so long, the weld must be continuous.
Can anyone give me some suggestion?
TY
Max
I'm having my first experiences in ultrasonic welding. My need is to weld an ABS (or PVC or PP) band on another thick piece of plastic, so that I can't use an anvil. Being the band so long, the weld must be continuous.
Can anyone give me some suggestion?
TY
Max






RE: Continuous ultrasonic welding without anvil
Without an anvil, ultrasonic can't develop enough heat to make a bond.
Mike Halloran
Pembroke Pines, FL, USA
RE: Continuous ultrasonic welding without anvil
Note that you will only get adhesion between similar polymers so nylon will not stick to PP. Adhesion between any two of the polymers you mention is likely to be poor.
Chris DeArmitt PhD FRSC CChem
www.phantomplastics.com
Consultant to the plastics industry
RE: Continuous ultrasonic welding without anvil
The more easily accomplished process would to have a hot melt adhesive that is dispensed between the two strata and then brought together through a set of pinch rolls or other means of holding the bond under pressure till solidified. Another possibility is a film of hot melt that is activated (melted) by a process (like Emabond) using magnetic or RF heating and the bond held under pressure until the hot melt becomes a solid again.
RE: Continuous ultrasonic welding without anvil
Chris DeArmitt PhD FRSC CChem
www.phantomplastics.com
Consultant to the plastics industry
RE: Continuous ultrasonic welding without anvil
And what about welding wood and thermoplastic? I know that wood has lignin, that is compatible with thermoplastic. But in this case I read somewhere on the internet that USW is worst than vibration welding. I think I'll make a try. When ready I'll inform you. Thanks to all.
Max
RE: Continuous ultrasonic welding without anvil
Chris DeArmitt PhD FRSC CChem
www.phantomplastics.com
Consultant to the plastics industry
RE: Continuous ultrasonic welding without anvil
RE: Continuous ultrasonic welding without anvil
BTW, I developed a way to ultrasonically or vibration weld wood onto wood as well. Now that is not trivial.
Cheers,
Chris
Chris DeArmitt PhD FRSC CChem
www.phantomplastics.com
Consultant to the plastics industry
RE: Continuous ultrasonic welding without anvil
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Continuous ultrasonic welding without anvil
http://fra
page 16
RE: Continuous ultrasonic welding without anvil
What normally happens without modification is that you get lots of smoke and burning. That's what they saw and what I saw too. We had to open the windows to stop the fire alarm from going off. Embarrassing because there were visitors passing through from Scania and they smelled the burning.
Anyway, I was able to get very good adhesion with no smoke or burning and without modifying the machine in any way.
Chris DeArmitt PhD FRSC CChem
www.phantomplastics.com
Consultant to the plastics industry