Parts cleaning is now an integral part of processing across all sectors and in the maintenance and recycling of products. The aim is to ensure the required cleanliness for subsequent processes such as machining, hardening, bonding, welding or assembly, as well as to deliver flawless product functionality within a stable and efficient framework. In doing so, component cleaning contributes to the prevention of rejects, reworking and product recalls caused by “unclean” components, which in turn creates added value.
There is no patent recipe for a reliable and efficient process that achieves the necessary part cleanliness. The whole process chain must be taken into account when selecting and optimising the cleaning processes. Among the most important criteria in this regard are:
- Which materials and/or material combinations are processed?
- What is the shape of the parts?
- What – substance and quantity – has contaminated the parts?
- In which phase of production are the parts cleaned, for example pre-cleaning, cleaning between two processing steps or final cleaning before assembly or packaging?
- Which particulate and/or filmic-chemical cleanliness requirements must be satisfied?
- What are the requirements concerning throughput?
The system and process engineering – the chemistry as well – can be adapted to suit the specific cleaning task once these questions have been answered.
A variety of cleaning methods are used, depending on the type of workpieces, contamination, requirements for component cleanliness and cleaning times within the production process.
When using wet chemical cleaning processes, the selected medium’s capacity to dissolve contamination has a decisive influence on the effect and therefore the quality, efficiency and stability of the cleaning process.