We used dry ice bead blasting in the tooling department at a major aircraft manufacturer I worked for. The unit we bought 8 years ago cost $40K but it was a diesel powered beast. The wand accepts different configurations of nozzles known as Venturi's each for different purposes. The process operates best at a minimum sustained pressure of 120 PSI which exceeds that of most low budget compressors. The process combines cryo & pressure to first freeze the material thus making it brittle and then blasting it off with dry ice pellets traveling at speeds of up to MACH 4 (4 times the speed of sound). The process is commonly used in the printing & rubber industries to clean drum rollers & molds since it removes debris without damaging the underlying material.
There was an OSHA recorded incident at another company where the operator bypassed the trigger mechanism by tapping it open. When he dropped the wand during operation the high velocity discharge made contact with his forearm nearly severing it but it was later amputated anyway due to frostbite. This process should only be used by well trained individuals who value their own safety as well as those around them.
There was an OSHA recorded incident at another company where the operator bypassed the trigger mechanism by tapping it open. When he dropped the wand during operation the high velocity discharge made contact with his forearm nearly severing it but it was later amputated anyway due to frostbite. This process should only be used by well trained individuals who value their own safety as well as those around them.
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