Questions

We have a substantial number of large non-pressure vessels with conical bottoms holding large quantities of high-viscosity fluids. Over time, we have developed new products of higher and higher viscosity. Now we find that the product is slow to start flowing, may not flow at all from a partially full tank, and leaves too much product in the vessel.

We're looking for ways to help the product flow. Air pressure on the surface is not an options, neither is heating the product due to degradation of some components. We're exploring technical alternatives.

Hi
Can anyone recommend an Australian manufacturer willing and able to assist with some metal ultrasonic welding of aluminium strip to a semiconductor solar cell? It's a small contact, and the cell substrate is Germanium, which is fragile but not [i]that[/i] fragile.

Take a look at the product on [url=http://solarhome.com.au/?page_id=15]http://solarhome.com.au/?page_id=15…]

I visited your forum recently. I liked all the correspondences and transfer of know-how to people who really need it. You are doing a great work.
I am a mechanical design engineer with no experience in Ultrasonic processing. I have started reading about the basic concepts and got a lot from your web site and manufacturers' web sites . I do not have a device and I do not know yet when I will acquire one. At this moment, I am interested to know the design of a system used to cut (plunge cut in the axial direction) soft materials like meat or potatoes. I have a couple of questions?

Can somebody help me on these issues,
1)If we weld two flat plastic components-Cycoloy(PC+ABS) and PC-on which component should have energy director?
At present the PC component is provided with energy director of 0.7 mm height.But after welding,
1) The welding joint is not strong enough.
2) Energy directors are not fully melting.It leaves impression on the cycoloy component.Is it because of difference in melting temperature?
Which type of welding is suggested?Pressure or delay?
What can be the welding time?

Chris,
We have a Horn Analyer that is about 10 years old. Can you tell me where we could get it calibrated, or if this is something we should be concerned with?

Thanks for your help,
Bruce

I am just started work with a small plastic company.we are having difficulty welding a small part. The part 38mm long 19mm diamenter .Hollow section wall thickness 2mm. Around the diameter is a 4mm hole. Due to weld length we seem to be unable to achieve a satisfactory weld .Both parts are acetal.

Any ideas

Myles

[size=12]Hello all, I am a Biochemist (from Chile, South America) .
Recently,  I started reading about ultrasonic applications for pollutant abatement,
and I am most  intereseted in  this technology.
As I am starting to learn, I have some doubts, the main one is the following :
I have no idea how the "Power Input" can be calculated, it always says :“by
calorimetric measurement” and I see the reference:  Mason Practical
Sonochemistry 1991 Users guide to applications in chemistry  and chemical
engineering . Regretably, I have no chance of buying or borrowing this book,

So, is this board still alive or what?

Hello Chris,

 I have a doubt regarding the power calculation for an ultrasonic generator. Kindly clarify.
 All ultrasonic generator manufacturers are telling the power in terms of watts. 1000W, 1500W, etc.Can you please tell how to calculate this power and what parameters are required for this? Generally for a rotating spindle in any machine, we calculate spindle power as (2*pi*N*T)/60 Watt, where N=spindle speed in RPM and T is torque in N-Meter. Like that is there any _expression for calculating the ultrasonic power?

Hi Chris
As you remember, I sent an email near 5 month ago about Ultrasonic Drilling. The good news is I made it and tested it this week!! It works like hell.