Cleaning ALSi10Mg - Case Study

Process for cleaning Graphite/Aluminium Moulds

Stage 1 – Rodastel 30: Rodastel 30 was used due to its hydrophilic properties. Rodastel 30 cleanses and conditions creating a hydrophilic surface. Cleaning occurs because water on the surface is able to spread out to a great degree (extremely low water contact angle) to get between any fouling debris and the surface to wash away the debris. The part was placed standing up inside the basket allowing for any trapped air inside the three helical holes to be removed. The basket dunking feature was used, this allows the basket to have a 32mm vertical travel aiding in cleaning. The part had a total cleaning time of 10 minutes, during the cleaning cycle air bubbles escaped out of the three vertical holes. This is a good indication the ultrasonic cavitation along with the chemistry has penetrated the holes.

Stage 2 – Tap water rinse: The parts were then rinsed in a tap water tank using the air bubble agitation feature for 2 minutes. The air bubble agitation feature acts like a Jacuzzi, sending small air bubbles from the bottom of the tank to the top for the length of the treatment time. This mechanical action helps remove any remaining debris and is a great tool for flushing blind holes and cavities. Rinsing is necessary to neutralise and remove any remaining detergent residue and debris.

Stage 3 – Hot air dry: Lastly the parts were dried in the hot air dryer set to 80°C for 5 minutes.