Press GB4789.26 canned tightness testing methods, the cans have been washed by 35 ℃ drying under reduced pressure, the pressurized leak testing. (1) vacuum leak: the drying cans carefully into the water eight, ninety percent full, the rubber band along the plexiglass plate properly placed in the open end of the can curl, can remain sealed, the vacuum pump, close the discharge valves, hand and hold the cover, control pumping, the vacuum table from 0 to rise above 0.069MPa time in 1min and maintain the vacuum over 1min, tilting closer look inside the empty cans and welding bead bottom joints or without bubbles. Where the same site continuously bubbles, it should be judged as a leak, the recording time and vacuum leak and the leak site cook mark.

(2) Pressure leak testing: the empty openings with rubber plugged, open air compressor, slowly open the valve, so that the tank pressure is gradually increased, while submerged in a water glass jar empty , careful observation of the bottom cover and the weld bead without bubbles generated until the pressure rose to 0.068MPa, and kept 2min, the same site where the bubbles should be judged as continuous disclosure, recording time and pressure leak and leak site cook mark.

Dongguan City is Connaught Packing Co., Ltd. mainly produce beverage EOE, aluminum easy-open lid, tinplate EOE other products, EOE products using health and safety, non-toxic and tasteless high-quality materials, using American MINSTER punch press high speed production lines, Japan AADA punch and supporting high-speed production line of the lid of advanced inspection equipment, product handsome in appearance fine; design structural precision, good sealing performance, nothing more than diarrhea, not into the air, to ensure product quality and lasting.