How stressful is old-fashioned popcorn?

Old-fashioned popcorn 10 pressure 0.6 to 0.7MPA.

It's different to explode different things with an old popcorn machine. Generally, it takes 6.2-6.8 atmospheres to explode rice and 0.7-0.8 atmospheres to explode popcorn. China old popcorn machine is an ancient popcorn machine. The loud noise of popcorn is an interesting memory of many China people born in 1970s and 1980s, including old stoves, gourd-shaped pressure cookers and sacks.

Old-fashioned popcorn principle:

Due to heating, the pressure in the machine gradually increases. When the required pressure is reached (different raw materials need different pressures), stop heating, twist the popcorn machine to one side and cover the machine mouth with a sack. Put the booster sleeve on the small elbow joint, and pull the small elbow joint hard to loosen the buckle with the big elbow joint.

In this way, under the pressure in the machine, the cover is opened, and the high temperature and high pressure gas in the machine is sprayed out together with the processing raw materials. In the process of injection, due to the rapid drop of external pressure, the gas inside the grain expands rapidly and the grain explodes.