Introduction to VAC20/25/32/40 Series Vacuum Cylinders

Product Overview

Model Interpretation

• VAC: Series code for vacuum cylinders
• 20/25/32/40: Cylinder bore diameter (mm)
• -XX: Stroke length (mm), e.g., VAC32-100 indicates a cylinder with a bore of 32mm and a stroke of 100mm

Core Features

1. Unique Working Principle

• Single air source drive: Only needs to be connected to a vacuum system, no additional air pressure required
• Vacuum extension: When vacuum is connected, the cylinder rod extends under negative pressure
• Automatic retraction: After contacting the material and generating sufficient adsorption force, the cylinder retracts automatically (no sensor needed)
• Integrated adsorption-lifting: The cylinder is integrated with the suction cup, simplifying system design

2. Structural Advantages

• Single vacuum interface: Simplifies air circuit connection and reduces installation complexity
• Built-in spring return: Automatically returns to the initial position when vacuum disappears
• Hollow piston rod design: Directly connects to the suction cup to form a complete vacuum path
• No anti-rotation function (standard type): The piston rod can rotate freely, suitable for multi-directional grabbing

3. Performance Parameters

Working Process

1. Extension Stage: Vacuum connected → Cylinder rod extends → Suction cup approaches the material
2. Adsorption Stage: Suction cup contacts the material → Forms a seal → Vacuum adsorption
3. Lifting Stage: Sufficient adsorption force achieved → Cylinder retracts automatically (no sensor detection required) → Material is lifted
4. Release Stage: Vacuum closed → Spring return → Suction cup releases the material

Application Fields

1. Electronics Industry

• PCB board handling
• Display screen and touch screen grabbing
• Semiconductor wafer transfer

2. Packaging and Printing Industry

• Single-sheet separation and conveying of paper/film
• Automatic carton unpacking/sealing
• Labeling systems

3. Glass and Building Materials Industry

• Handling of glass sheets and panels
• Pick-and-place of ceramic tiles and thin plates
• Door and window assembly production lines

4. Food and Pharmaceutical Industry

• Food packaging and carton sorting
• Pharmaceutical aluminum foil board handling
• Automated conveying of medical consumables

Selection and Installation Guidelines

1. Selection Guide

• Choose bore diameter based on load: Larger bore diameter means greater adsorption force (it is recommended to leave a 30% margin)
• Stroke selection: Ensure it is larger than the maximum working distance (usually 50-150mm)
• Special environments: Select silicone seals for high temperatures; conductive rubber for anti-static requirements

2. Installation Notes

• Air circuit connection: Only connect to a vacuum source; do not install a regulating valve (it will affect the automatic return function)
• Installation direction: Vertical or horizontal installation is acceptable, but ensure the piston rod is consistent with the load direction
• Support design: For long strokes (>100mm), it is recommended to add intermediate support to prevent shaking
• Air source quality: Use clean and dry air (filtration precision ≤5μm, oil content <1mg/m³)

Advantage Comparison

Summary

Key Term Explanations (for international customers)

1. Single-acting cylinder: A cylinder that is driven by pressure in one direction and returns by a spring in the other direction.
2. Vacuum negative pressure: The pressure lower than atmospheric pressure, which generates adsorption force to hold materials.
3. Hollow piston rod: A piston rod with a hollow interior, designed to connect the suction cup and transmit vacuum.
4. G1/8/M5: Standard pipe thread sizes, commonly used in pneumatic components for air circuit connection.