At Melon Rubber, we offer both rubber deflashing way -manual trimming and cryognic deflashing.  different part structure, different rubber mould design, different deflashing trimming way.

for example, like to middle or big size custom rubber gasket with ribs or bosses or special structureetc. manual trimming is more better way to ensure part quality.

manual trimming of rubber part is not a simple manual work. It requires special training, teaches employees different trimming techniques, and peaks in different positions. Through professional training, it improves efficiency and ensures product quality.

also for O-ring or rubber silicone flange gasket, cryogenic deflashing is most versatile and effective way to remove flash from custom rubber part. 

Flash comes from mould parting line. This is when excess moulded material escapes from the mould cavity during production. In cryogenic deflashing process rubber parts are placed inside a barrel and liquid nitrogen is used to chill the parts so that the flash becomes brittle. The temperature of the flashing on the rubber is reduced to below its glass transition temperature, a point at which rubber behaves like glass and becomes easy to remove but does not crack the part. Once chilled, the machine tumbles the parts around on themselves allowing all the flash to break off. Cryogenic deflashing does not degrade the parts or harm their finish in any way. Edges stay sharp and recessed areas are completely cleaned of flash.