How does a suction cup function?
The functioning of the suction cup is based on suction or, in other words, vacuum. A suction cup is attached by pressing on it. Pressing the suction cup causes the air underneath to be forced out. If the suction cup is then released, it will want to recover its original shape, however, the edges seal airtight to the smooth surface creating a vacuum. When we refer to smooth surfaces, consider glass, windows, mirrors, smooth tiles, metal surfaces, etc.
A suction cup is released the moment the vacuum is lifted. This can happen over time or manually. For manual release, there is often a small tab on the edge. By pulling the tab, air is admitted and the vacuum is dissolved.
The great advantage of suction cups is that no permanent marks are left after removal, which is unlike drilling, nailing, screwing or gluing.
What types of suction pads are there?
The suction cup with hook, also referd to as suction hook, is perhaps the best-known example, but there are many more suction cup models to choose from, like:
- Hook - fixed or fold-down
- Button - with or without bore
- Borehole - head drilling or side drilling with or without slotting
- Threaded - with moulded in male or female thread
What are suction cups used for?
Many application examples can be given for suction cups. Those versions with hook are often used to hang objects that are often removed and hung back. Think of banners, open/closed signs etc.
Versions with knob or cam or thread are often used for hanging promotional signs, rally signs, decoration, awnings, etc. Often these objects have holes, eyelets or slotted holes into which the suction cup is pushed or screwed.
Borehole suction cups have many possibilities. If there is a bore at the head, a crocodile clamp, pin or rivet can be inserted. If the bore is lateral, a rod, bar or cord can be inserted or pushed through.
In short, the application possibilities for suction cups are vast. Are you looking for a different version? Then feel free to contact us.
