Mechanical polishing performed at STI
- Ultrasonic cleaning – removing dirt and other contaminants (oil, grease, fingerprints, dust, etc.) that adhere to the surface by immersing the object in a mild cleaning solution (water or other solvent) and then agitating the cleaning solution using high frequency sound waves. Ultrasonic cleaning enables cleaning in difficult to reach areas, including inside of small diameter tubular objects, such as: stents, guidewires, cannulae, endoscopic tubes, etc. Ultrasonic cleaning variables include the object, the cleaning solution, temperature, volume and the cleaning time.
- Honing – an abrasive machining process performed immediately after laser cutting. In stent manufacturing, for example, leftover material between struts is gently removed and rough edges smoothed out using fine files.
- Magnetic deburring – magnetic pin tumbler used for tight tolerance deburring or radiusing of sharp corners and edges introduced earlier in the fabrication process. Parts are placed in a container filled with the deburring media composed of fine stainless steel pins suspended in soapy water. As the pins circulate they strike the parts and produce the deburring action.
- Micro abrasive blasting – clean air mixed with abrasive micron-sized particles, known as the blasting media, propelled out of a nozzle at a controlled pressure. Micro abrasive blasting can be used for focused deburring, surface texturing, surface cleaning and breaking sharp corners.