Bellows Suction Cups

Bellows Vacuum Cups for Uneven, Curved & Flexible Products

Bellows vacuum cups are one of the most versatile suction cup designs used in vacuum automation. Unlike flat vacuum cups, bellows cups feature one or more flexible convolutions that allow the cup to compress during product pickup. This compression helps compensate for variations in product height, robot positioning tolerances and uneven surfaces, making bellows cups ideal for automated handling applications where perfect alignment cannot always be guaranteed.

Bellows vacuum cups are widely used in robotic pick-and-place systems, packaging machinery, food packaging equipment, carton handling systems, plastic part handling, bag handling and general industrial automation. Their ability to conform to irregular surfaces makes them one of the most popular vacuum cup styles in modern manufacturing.

What Is a Bellows Vacuum Cup?

A bellows vacuum cup uses one or more flexible bellows sections between the fitting and sealing lip. These bellows allow the cup to compress during product contact, reducing impact forces and accommodating variations in product height.

Because the cup can collapse and expand during operation, bellows vacuum cups are particularly useful when handling products that are not perfectly flat or when the robot approach position may vary slightly from cycle to cycle.

Why Use a Bellows Vacuum Cup Instead of a Flat Cup?

While flat vacuum cups are ideal for smooth, rigid surfaces, bellows cups provide additional flexibility that helps improve sealing and product handling performance in more challenging applications.

• Height Compensation: Accommodates variations in product position.
• Gentle Product Contact: Reduces impact forces on delicate products.
• Curved Surface Handling: Better sealing on convex and concave surfaces.
• Uneven Product Handling: Adapts to varying surface heights.
• Improved Robotic Tolerance: Allows greater flexibility in robot positioning.
• Packaging Applications: Excellent for bags, pouches and flexible packaging.

Common Bellows Vacuum Cup Materials

• NBR Rubber: General-purpose industrial compound with excellent durability and wear resistance.
• Silicone Rubber: Suitable for higher temperatures and many packaging applications.
• FDA Compliant Silicone: Designed for food and pharmaceutical handling applications.
• Metal Detectable Silicone: Commonly used in food production facilities where foreign material detection is required.

Bellows vacuum cups are available in diameters ranging from 5 mm to 200 mm, allowing handling solutions for everything from small electronic components to large cartons and industrial products.

Applications for Bellows Vacuum Cups

• Food packaging automation
• Flexible pouch handling
• Carton and case handling
• Bag and sack handling
• Plastic part handling
• Injection molded components
• Robotic pick-and-place systems
• Consumer goods packaging
• Uneven product handling
• General factory automation

Bellows Cups for Flexible Packaging

Bellows vacuum cups are particularly effective when handling flexible packaging because multiple cups can independently compress and adapt to varying product shapes. This helps create reliable seals even when products have wrinkles, height variations or irregular surfaces.

In automated packaging systems, bellows cups are often preferred because they provide better adaptability than flat cups while helping reduce product damage during pickup and placement.

How Many Bellows Should I Choose?

Bellows vacuum cups are available in single bellows, multi-bellows and deep bellows configurations. More bellows generally provide greater flexibility and height compensation, while fewer bellows offer increased stability. The ideal choice depends on the product shape, handling speed and application requirements.