Stacking; Staking - Dukane iq series User Manual

iQ
Series Ultrasonic Press System LE User's Manual
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Problem
A ragged or irregularly shaped stake head is formed.
Probable Cause
The staking cavity is too large.
The volume of plastic in the stud is
insufficient.
The stud is melting at the base.
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Problem
There is excessive flash around the stake head.
Probable Cause
The staking cavity is too small.
The volume of plastic in the stud
is excessive.
The stud is not centered in the
horn cavity.
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Problem
The surface below the stake head is distorted.
Probable Cause
The part is not supported directly
beneath the stud being staked.
The trigger force is too high.
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Problem
There is a loose fit between the staked head and the part being attached.
Probable Cause
The hole diameter relative to
the stud diameter is too large.
Page 128

Staking

Solution
Change to a smaller cavity in the horn.
Increase the stud height/diameter.
See the problem section that follows entitled
"The base is melting before the head forms."
Solution
Use a larger cavity in the horn.
Decrease the stud height and/or
diameter.
Center the stud under the horn cavity.
Solution
Support the fixture with a metal post
beneath the stud being staked.
Reduce the trigger force.
Use pre-triggering.
Solution
Reduce the hole diameter.
Continued
Dukane Manual Part No. 403-586-02