Question 1

What is a vacuum suction cup used for?

Accepted Answer

A vacuum suction cup is a specialized tool used to pick, move, and place objects by creating a negative pressure seal against the surface of a workpiece. These components are essential in automated systems for tasks like palletizing boxes, assembling automotive parts, or handling delicate food items without causing damage.

Question 2

Are your soft grippers safe for direct food contact?

Accepted Answer

Yes, Piab soft grippers like the piSOFTGRIP® are specifically engineered from food-grade silicone that meets FDA and EU 1935/2004 regulations. The one-piece design eliminates crevices where bacteria could grow, and the material is detectable and resistant to the harsh chemicals used in wash-down environments.

Question 3

What is the difference between a flat suction cup and a bellows suction cup?

Accepted Answer

Flat suction cups are designed for high-speed stability and lifting force on flat surfaces, whereas bellows suction cups feature a flexible "accordion" fold. This bellows design allows the cup to compensate for height variations, reach into deep containers, and provide a gentle touch for fragile or uneven objects.

Question 4

How do I choose the right size suction cup?

Accepted Answer

To choose the right size, you must calculate the required lifting force based on the workpiece weight, surface texture, and the acceleration of the robot arm. It is standard practice to apply a safety factor of at least 2 for horizontal lifts and 4 for vertical lifts to ensure a secure hold.

Question 5

Can vacuum suction cups work on porous surfaces?

Accepted Answer

Vacuum suction cups can work on porous surfaces, such as cardboard or wood, provided they are paired with a high-flow vacuum generator. The generator must be capable of evacuating air faster than it leaks through the material to maintain the pressure differential necessary for a secure grip.

Question 6

Is the suction cup lip an important factor when choosing a vacuum suction cup?

Accepted Answer

Yes. The suction cup lip is one of the most important factors to consider when selecting a vacuum suction cup, as it directly affects grip, sealing performance, and handling reliability for different materials. For example, when handling thin plastic bags or flexible packaging, a suction cup with a thin, compliant lip and concave design, such as the BGX, provides a reliable seal without damaging the material. On the other hand, when lifting oily metal sheets in automotive applications, suction cups such as the PAB, PAF, or BFFT feature specially designed friction patterns on the lip to increase grip and reduce the risk of slipping. Choosing the right suction cup lip for your application helps maximize performance, improve process reliability, and reduce the risk of dropped workpieces.