Ultrasonic Cleaning PVC (Polyvinyl Chloride) - Case Study
Contamination prior to cleaning: Rocol Tri-Logic HPX Oil
|Machines used for cleaning||Cleaning Agent||Temperature(s)||Concentration|
|Kemet 30||Galvex 17.30||70°C||3%|
|Versa 50||Tap water||Ambient-20°C||100%|
|Versa 50 hot air dryer||N/A||70°C||N/A|
Process for cleaning PVC
Tank 1 was filled with tap water and diluted with a 3% concentration of Galvex 17.30 cleaning fluid and allowed to reach the required temperature whilst degassing. Galvex 17.30 is a multipurpose degreaser designed specifically for ultrasonic cleaning. It emulsifies and dissolves grease and oil and can be used with plastics and metals except for aluminium. A single part was cleaned for 3 minutes to ensure the process produced optimal results. The part was then rinsed in the Versa 50 rinse tank for a cycle time of 1 minute. The Auto purge feature was used; this allows fresh tap water into the tank for the length of the treatment time. The benefit from this is we can remove the soap and residue carry over. When the level rinses, it reaches the overflow weir which is connected to the drain. Without this feature, rinse water can become polluted very quickly. This is one of the main causes of stained parts. Lastly, the part was dried in the hot air dryer at 70°C for 10 minutes. Upon inspection, there is no visible oil contamination remaining or staining. The remaining 5 parts were cleaned as a batch. The cleaning time was upped from 3 to 5 minutes. The rinse cycle was 1 minute with a 10-minute dry as before. Good results with no visible traces of contamination or staining.