In the realm of automated feeding devices, the pneumatic feeder stands as a pioneer, maintaining a formidable presence in stamping and stretching industries, thanks to its remarkable cost-effectiveness. However, for many users, delving into the operational intricacies of the pneumatic feeder raises numerous questions. To unravel this mystery, a foundational understanding of its internal structure is imperative. Let’s explore the pneumatic feeder’s components and operational sequence in detail.

The Anatomy of a Pneumatic Feeder

1. Main Body and Fixed Clamps

The pneumatic feeder’s main body is designed with a feeding plane parallel to the material conveyance direction. This is the space where materials are efficiently transported. The fixed clamps, integral to its structure, comprise fixed clamp heads and a fixed clamp featuring a fixed cylinder shaft. These fixed clamp heads are firmly attached to the fixed cylinder shaft, positioned perpendicular to the feeding plane.

The clamping force direction of the fixed clamps is crucial—perpendicular to the feeding plane. This unique configuration allows them to securely grip materials from both upper and lower surfaces, essentially clamping in the thickness direction of the material.

2. Feeding Cylinder and Movable Clamps

The feeding cylinder, housing a feeding cylinder shaft, plays a pivotal role in the pneumatic feeder’s functionality. It is intricately connected to the movable clamps, facilitating linear movement in the material conveyance direction. The feeding cylinder shaft, aligned parallel to the feeding plane, serves as the driving force behind the movable clamps.

As for the movable clamps, they consist of movable clamp heads and a movable cylinder featuring a movable cylinder shaft. These movable clamp heads are affixed to the movable cylinder shaft, positioned parallel to the feeding plane. The clamping force direction of the movable clamps runs parallel to the feeding plane, enabling them to grip strip materials from both left and right sides—the width direction of the material.

The movable clamp heads exhibit versatility in shape, with variations such as triangles, horns, isosceles trapezoids, or other forms gradually tapering from external to internal diameters. Both the movable cylinder shaft and movable clamp heads share a common axis, enhancing their synchronized movement.

Operational Sequence of the Pneumatic Feeder

Understanding how the pneumatic feeder operates is key to maximizing its efficiency in the stamping process. The sequence unfolds as follows:

  1. Compressed Gas Entry:
    • Compressed gas enters the feeder, initiating the internal pneumatic circuit.
  2. Clamp Release and Material Securing:
    • The directional valve is raised, releasing the fixed clamps.
    • Simultaneously, the movable clamps extend into material gaps, securing the material in place.
  3. Material Advancement:
    • The feeding cylinder advances, propelling the material forward.
  4. Reverse Signal from Stamping Press:
    • As the stamping press descends to a specific distance, it sends a reverse signal to the directional valve.
  5. Clamp Engagement and Preparation for Next Cycle:
    • The fixed clamps now clamp the material securely.
    • Movable clamps retreat from material gaps.
    • The feeding cylinder moves back, preparing for the subsequent feeding cycle.
  6. Collaborative Motion in Stamping Process:
    • The stamping press and pneumatic feeder work in tandem.
    • Stamping press executes “upward-descent-upward” actions, while the pneumatic feeder performs “feeding-retracting-feeding” motions.

This synchronized dance of actions concludes the automatic feeding process in the stamping industry, showcasing the efficiency and reliability of the pneumatic feeder. As technology evolves, understanding the fundamentals becomes paramount for harnessing its full potential.

pneumatic feeder
pneumatic feeder