No power , also known as self-suction vacuum suction vacuum sucker

According to the principle can be divided into electromagnetic and permanent magnet . Through direct current electromagnetic coil excited by magnetic materials, magnetic power to discharge . To prevent material falling when power with this sucker cranes generally need to have backup power. By the permanent magnet permanent magnet ( such as aluminum, nickel and cobalt alloys or strontium ferrite magnets suction head ) suction , power degaussing discharge, when power is no material risk of falling , but not clean when degaussing Electric stacker adsorbed iron oxide skin, affecting suction. Round magnechuck used most. When drawing sheet and strip is more rectangular magnetic chuck . Sucker was mostly planar bottom surface ; also has a concave curved to draw buckets and plate rolls . Lifting long items , you can use several cups simultaneously. Lessons electromagnetic sucker material temperature generally does not exceed 600 ℃. ② vacuum suction : the vacuum device and a soft plastic or rubber suction cup bowl first class composition, divided into two kinds of power and no power . Vacuum suction force to obtain a vacuum by a vacuum pump , the suction is larger, but there is noise , and require cables or air hose attached . No power , also known as self-suction vacuum suction vacuum sucker, sucker when you lift rod driven by a hook to get a vacuum , no power source, has a simple structure , no noise , etc., but usually only absorb 500 kg or less material . Vacuum suction used to draw the article surface is flat , the sucked magnetic conductive material is not without limitation , steel , glass, plastics, cement products and timber are sucked into operation, and one by one from a stack of sheet material dispensing, high efficiency .