Deflashing cryogenic

Many moulded products can be separated from their excess moulding scrap by use of scissors, cryogenic deflashing or buffing. The latter process has to be carried out with caution for those products which are bonded to metal substrates, because excessive generation of heat will result in loss of the bond integrity and product failure. 

Cryogenic deflashing of rubber is commonly carried out using liquid nitrogen as the temperature depressant, although some smaller units can be operated using solid carbon dioxide as the low temperature medium. 

Cryogenic deflashing should be controlled so that only the flash is embrittled. If the polymer in the component becomes brittle the bond could fracture. 

Previously, this residual material was removed by hand, using knives or scissors, for instance. Later, CO j-based cryogenic machines were used to perform this task. Today, we often employ automatic cryogenic tumblers or cryogenic shot blast deflashing machines. Liquid nitrogen (LIN) is normally used as the cryogenic fluid. 

Deflashing Technique of removing flash from a plastic product, usually a molding. Several different methods are employed that include low temperatures of dry ice and cryogenic. 

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