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Vacuum Cup Basics |
When it comes to choosing the best vacuum cup for an application, there are plenty of formulas and pages of technical data to help you make the right choice. However, in the real world, there is basically no substitute for testing. We suggest reading over the suggestions and comparisons below and then applying them to the individual Vacuum Cup Properties charts found in our catalog pages. You can then test several choices to see which best suits your specific application. Or contact us at: 216-535-4848 or EOAT@EMIcompanies.net |
| Using
vacuum cups to grip the part In most EOAT applications, using a vacuum cup to grip the part is usually the most efficient as well as the least costly gripping option. Vacuum cups are relatively inexpensive, dependable, easy to replace and do not normally require a separate part verification sensor. |
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Flat
cups vs. bellows cups If the surface is textured, curved or angled, a bellows cup is usually the best choice. Bellows cups come in a variety of depths which allows them to conform to a wide range of uneven surfaces. Because bellows cups tend to bend out of shape more than flat cups, they sometimes have trouble maintaining a vacuum when gripping heavier, vertical surfaces. See some of our mounting hints below. |
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Hints for using Bellows Cups with large or heavy parts |
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Vertical
positioning Position the vacuum cups vertically instead of side by side. This keeps part
from rotating downward on the vacuum cups. |
Tripod
positioning A tripod provides far better support than cups in a row.  |
|
 Reduce
shear forceTry using a gripper finger to draw the part closer to the EOAT. This reduces the shear force on the vacuum cup to maintain a good vacuum seal and reduces flexing while in transport. |
Support
the part Position an air cylinder below the part to support it. |
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| More Vacuum Cup mounting hints | |
1
.To
reduce the chances of vacuum leakage, be sure to use sealing
rings on all threaded, fitting connections. |
 Always
use sealing rings between threaded connections to reduce vacuum
loss. Note: see our Push-to-connect
fittings with integrated O-rings-pdf Spring loaded suspensions are an excellent way to compensate for variations in
the height of the part. To save on cost and weight, a rigid extension can often
be combined with a spring-loaded
extension to extend it’s reach |
2. To
achieve maximum vacuum, use tubing that is large enough to
allow unrestricted air flow to the vacuum cup. |
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3. To
provide the fastest attach / release times, keep vacuum lines
between the vacuum generator and the vacuum cup as short as possible. |
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4. If
vacuum cups are leaking at the base of the pad, try using an
electrical tie to stop the leakage. |
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5.To
prevent oval cups from rotating out of position when gripping
long, narrow parts, be sure to use non-rotating suspensions. |
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For
a catalog or more information, please contact us.
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Phone
- 216-535-4848. Fax-
216-535-4823 Email - EOAT@EMIcompanies.com
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| © 2007 EMI Plastics Equipment. All rights reserved. | Contact us at 800-543-6169 or Sales@EMIplastics.com |