FREQUENTLY ANSWERED QUESTIONS
What size limits do we have?
We can mould and process parts up to 1.5m x 1m x 0.5m right down to small complex hand-held parts.
What tolerances do we work to?
We can create parts with a linear tolerance of +/- 0.4mm from drawings to first-off samples, and thereafter those dimensions can be repeated within +/-0.25mm.
What timescales do we work to?
Our normal order-to-first-off timescale is around 6 to 8 weeks and we can usually produce finished models within a week or so from go ahead.
What densities do we work to?
An optimum mixture of mechanical properties is achieved within a density range of 600 to 650 kg/m3, given correct mixing and mould temperature conditions. Lower densities can be moulded in order to reduce weight or improve temperature insulation properties.
What temperature limits will PU withstand safely?
Parts produced at our recommended 600 to 650 kg/m3 density have proved to be stable down to temperatures of minus 40 degC and up to 80 degC. This is a manufacturer’s stated top limit-before distortion however, so we recommend a safe upper temperature limit of around 60 degC to preserve cosmetic integrity.
Do we produce models?
We can – either machined from model-board or CAD driven SLA models – finished and painted to exactly replicate the final part.
What processing equipment do we have?
We currently run four high pressure dispensing machines and a low-pressure mechanical-mixing unit for small components. We also have low-pressure solid cure elastomer machine for non-foamed applications.