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Elastic Energy and Sticky Number Seven

Elastic Energy and Sticky Number Seven

Don't worry about that open 7-10 split. In fact, we want you to leave every pin standing.

Because this isn't about bowling. And those pins are really your bottles or cans conveyed along an automated filling machine.

Ready to score a perfect 300? This time, leave 'em standing.

Easy, if you overcome friction relating to "stick-slip". Often found in connecting regions between conveyor lines, where static friction is much higher than kinetic friction. Bottles or cans "stick" to the contact surface. And only with sufficient elastic energy does forward motion occur.

But before breakaway what happens? Where does the energy go? How is it released?

Vibration is some of that energy translated, causing cans to wobble, bottles to topple. Product loss, disruption can be significant.

What do you do?

You've considered parameters for contact geometry, elasticity or hardness, motion, velocity, temperature, and static or dynamic load or normal force.

Now take a look at a smooth finish with dry lubrication, using polytetrafluoroethylene (PTFE) or harder protective finish adding nickel or polished chrome.

By lowering static friction you reduce vibrational energy. That leaves mechanical energy losses incremental, through minimal frictional heat dissipated by the contacting area.

Reduce stick-slip. Then watch your bottles or cans stay upright.

Now that's the perfect game.

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