Dukane iQ Series User Manual download pdf (Page 96)

Page 90

iQ Series, Ultrasonic Generator/Power Supply LS-E User’s Manual

Dukane Manual Part No. 403-588-00

Welding Problems

Weak Welds

Weak welds, or underwelding, is caused by insufcient

energy being transmitted to the part. You can increase

the weld pressure, increase the weld time or change to a

higher gain booster to increase the amplitude to increase

the energy delivered to the weld.

Excess Flash

The energy director may be too large. You can try to

reduce the weld pressure and/or weld time. The parts

may have too much shear interferences or a nonuniform

joint dimension.

Inconsistent Welds

Variations in plastic due to ller materials and moisture

absorption may lead to inconsistent welds. Fillers can

be especially troublesome if they are not uniformly

distributed, the content is too high or it contains too

much or poor quality regrind or degraded plastic.

Check the horn and xture alignment and parallelism.

Check the alignment of the mating parts, shifting during

welding or residual mold release on the parts.

Try welding by energy. This eliminates many

inconsistencies. There should be no unusual or loud

noise from the acoustic stack. If there is, disassemble

the stack and reassemble.

Exchange the probe with another unit to see if the problem

disappears. If not, exchange the generator with another

unit to try and isolate the problem.

The horn amplitude may not be uniform if it has been

machined, altered or damaged. All of these will change

the resonant frequency of the horn. You can have the

horn analyzed.

1 2 ... 91 92 93 94 95 96 97 98 99 100 101 ... 143 144

No comments

Dukane iQ Series User Manual Page 96