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Views: 85 Author: Site Editor Publish Time: 2023-10-20 Origin: Site
Suction cups, also known as vacuum cups or suction cups, are versatile devices that work on the basis of negative fluid pressure. The difference between the low pressure chamber and the atmospheric pressure creates a partial vacuum that facilitates the ability to lift, hold, move and perform work. Usually made of rubber or plastic, suction cups are often required when dealing with applications that require lifting or handling of materials such as glass, stone (e.g. granite, marble, etc.) and insulated metal sheets (IMP).
Suction cups have evolved over the years in terms of shape, design and composite materials and through this development they are increasingly being used in all types of domestic and industrial applications. Consumer applications for suction cups include fixing various household accessories to shower glass, tiles and painted drywall in bathrooms, while industrial applications include glass lifting and fabrication, window installation, boat building, IMP installation, and material handling in automated and manual line assembly.
Whether you are lifting glass, installing insulated metal panels, moving slate, handling materials on a production line or hanging toiletries in the shower, you have probably encountered and used suction cups many times in your life. In fact, if you've ever had the joy of using a toilet plunger, you've actually used a suction cup.
Suction cups rely on external pressure being greater than internal pressure. To achieve this, the suction cup uses the negative pressure created by "pushing" out the liquid contained inside the cup (the cavity) and the positive pressure of the liquid trying to return. To prevent the liquid from 'seeping' into the cavity of the suction cup and weakening the ability of the suction cup to adhere to the surface, the edge of the suction cup must be in contact with the surface to create a tight seal.
The time it takes for the suction cup to lose some of its vacuum on the surface of the material/object depends on the time it takes for the liquid to enter between the suction cup and the surface, allowing it to equilibrate with the surrounding atmospheric pressure. This depends on several factors including, but not limited to, the porosity of the material, the mass of the cup rim and the amount of vertical pull or shear force applied.
