Resin speeds mobile phone prototyping
A
DSM Somos product story
Edited by the Engineeringtalk editorial team
Mar 30, 2004
With the addition of DSM Somos 9120 ProtoFunctional resin to its production line, Malcolm Nicholls has been able to cut prototype build times of Panasonic's new X70 camera phone by one third.
With the addition of DSM Somos 9120 ProtoFunctional resin to its production line, Malcolm Nicholls has been able to cut prototype build times of Panasonic's new X70 camera phone by one third.
The decision of Panasonic to specify Somos 9120 for the X70 camera phone prototypes was based heavily on the need for part flexibility.
The clamshell for the phone assembly uses snap fittings and, as functional testing was required, these would need to reliably withstand repeated clipping and unclipping.
Richard Haines, Design Engineer for Panasonic Mobile Development Communications of Europe (PCMDE) explained: "We needed the prototypes for trial assembly to carry out over packing detection, and to test fit mock up PCBs.
In addition, we used them to carry out RF testing to ensure that the case and the components functioned correctly.
These trials required us to open up each clam shell several times, thoroughly testing the integrity of the clip fastening".
To meet the delivery requirements of Panasonic, Malcolm Nicholls built multiple masters simultaneously in 9120 to be used directly for evaluation.
The company was pleased with the results.
"Some resins we have worked with are very brittle and have caused serious problems for the workshop", says Malcolm Nicholls Technical Director Ross Nicholls.
"The simple act of removing supports from a model could result in its damage, which would then require repair or actual rebuilding of the SL master".
"With Somos 9120, part breakage has been virtually eliminated, and in addition we have achieved around 30% reduction in build times on our SL machine through faster resin reaction times, combined with zero predip delay and zero Z-wait periods.
Furthermore, we have found that 9120 is very process tolerant, so, for example, we can increase hatch spacing and simplify support positioning without reducing model quality".
For multiples of parts, Malcolm Nicholls uses the SL master to create a silicone mould.
Ross Nicholls sees further benefits from the properties of Somos 9120: "We find that, depending on the shape of the model, it is possible to reuse the master to create additional moulds.
The brittle resin we used in the past would result in the master shattering during demoulding.
Furthermore, we find that 9120 does not distort during the curing process required for silicone moulds, which can reach temperatures of 60C".
Malcolm Nicholls was the first rapid prototyping service bureau in Europe to specify Somos 9100 for all its SL models, after positive trials of the material in 2000.
A natural transition to Somos 9120 coincided with the upgrade of the laser on its SLA 500/40 machine from argon ion to solid state in 2002.
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