Internal Layer Thickness Measurement Technology

I assume the multiple internal layers are one on top of each other, or maybe not. If you can send a sketch and the desired measurement accuracy, I may be able to help.

Thanks for your offer to help. Not able to send a sketch now - I am new to this forum... Try to picture a block of rubber 4"x8"x10". There are layers of metal nominally sized 1/4" smaller on the inside. The metal layers are spaced ~3/8" apart. All metal is parrellel.... I need to assure the outer rubber thickness as well as the internal rubber thickness between metal.

Rubberman

what is metal IRON?

if yes then

I think you can use a magnetic path to measure the distance inbetween.

Just make a U type electromagnet operated at constant AC 24 volts.put a calibrated current meter in series.

Connect the two poles North and south with any two iron plats.the amount of current will change with the distance of plates.

You can calibrate your meter for dif distances.

The another method you can adopt is use any two plates of your block as 2 voltage probes in a 4 probe resistane meter.

Just take a Coper sheet well calibrated pass a constant current through it. put your whole block on it making sure that two metal plates are in complite touch with coper sheet.now just measure the ammount of voltage you are getting between two plates.

this voltage will be perpostional tothe distance of 2 plates.

1st method will give you average distance where as second method will give you the distance at the end that is in touch with coper sheet.

I would contact a local NDT type company, like a MQS or Conam.

They have various types of equipment and methods, such as UT that may work.

Thank you very much for the advice.... I'm on it.... (seems clear now!)

Quick General Thought: This could be manufactured this way, using material volume controls and mold (among other) methods. Cutting a few of the parts, physically measuring and determining the statistical thickness variation for the process of making the multilayer rubber/metal "composite" could be easy enough. This can be compared to the tolerance goal for the success of the application.

Depending on the application industry, and any need for quality rubber, the company I work for www.gtweed.com could be commercially helpful.