-> Gripper feeders
Gripper Feed.
A lower-cost option, a gripper feed uses a linear motion, rather than rotary action, to move the strip. Gripper feeds utilize a pair of clamps. One is a stationary clamp called the retainer, and the other, called the gripper, moves infeed and return strokes. During the feed stroke, the retainer releases the strip as the gripper clamps and moves it forward through the top half of the press cycle while the tool is open. On the return stroke, the gripper releases the strip, and the retainer holds it while the gripper retracts from the press through the bottom half of the press cycle while the tool is closed. Because it usually takes about as much time for the return stroke as it does for the feed stroke, gripper feeds are limited to a 180-degree feed window at maximum operating speed.
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The gripper and retainer clamps can be air- or hydraulic-powered cylinders, or they can be one-way roller mechanisms that hold the strip in one direction but allow it to roll freely in the opposite direction. With cylinder-powered clamps, the timing of the clamp and release is critical to accurate feeding and can be a limiting factor in terms of speed. If the timing is not correct, the strip can be free at times to fall back, resulting in short feeds. Clamping is actuated by solenoid valves or air logic valves. Timing can be controlled either electrically or through valve porting.
The pulling force for the gripper can be provided by an air or hydraulic cylinder, hydraulic motor, or by a servomotor. The gripper usually is supported by guide bars or rails and is driven by cylinder rods, chain and sprockets, or ball screws. With air- or hydraulic-powered units, the feed length is set by adjusting a positive stop. The gripper moves between the adjustable stop and a stationary stop and employs a cushion of some sort to soften the blow at the end of each stroke. Feed length adjustment may require the use of tools and often involves some trial and error, which usually results in longer setup times.
For applications requiring low to moderate speeds and limited feed lengths, relatively inexpensive air-powered grip feeds generally are used with pull-through straighteners to provide a cost-effective alternative to roll feeds with powered straighteners.
Some gripper feed limitations are:
- The longest feed length requirement must be anticipated at the time of purchase. The disadvantage is that each additional increment of length costs more money and requires more valuable floor space. If there is ever a need to run a feed length that is longer than the machine was designed for, it must perform multiple cycles on each press stroke, commonly referred to as multistroking. This capability requires an optional and more expensive controls package, and because of the time required for the return stroke, the press usually must be operated in the single-cycle mode when multistroking.
- Its low initial capital cost may be offset by longer setup time and higher maintenance and energy costs. Compressed air often is an expensive energy source because of losses due to leaks, pressure drops, and contamination. Because of the many moving parts and wear components, maintenance costs can be quite high. These machines require timely maintenance to sustain good accuracy and performance.
Gripper feed sizes can run the gamut from compact, press-mounted models to large, cabinet-mounted models that include pull-through straighteners.
There are many ways to feed a press, but many important considerations regarding the purchase, setup, and operation of this equipment will help determine how productive it will be. If the system is to work at maximum efficiency, then each component of the system must complement the others. An in-depth discussion of each potential application with production schedulers, managers, engineers, and equipment suppliers will net the most advantages.
Air feeder is one of the longest exisiting products There are varieties of such air feeders:
Automatic pneumatic air feeder machine: In this machine, the central hole of the main structure is being prepared by lapped finishing which enables the core shaft to run in a smooth manner. The two units of automatic pneumatic cushions are adopted in order to reduce the vibrations and noise efficiently. The models of the machine are being produced according to the different dimension and length.
Big heavy duty automatic pneumatic air feeder machine: All the sealing parts of the machine are introduced from Japan along with the features of compact conformation, high accuracy, high speed, and a good combination of beauty and application. All the screws of the machine are being fixed with high strength oxygen pressed rubber in order to avoid them loosening from the vibration, attain good sealing capacity.
All of them are being manufactured by the skilled and expert engineers meeting all the international standards of quality and are also appreciated by clients for their trouble free performance and long durability. Absolute accuracy is one of the main features of air feeder which is being achieved in proper working conditions. Stroke length and speed adjustments are being positioned for easy success. Built in pilot release arrangement, air feeder has the output of 100% additional performance. It can be easily installed and can also be removed using the most versatile type of feeding equipment available.
Gripper Feeder - Shenzhen Lihao Machine Equipment Co., Ltd.
Gripper Feeder Solutions for Precision Stamping | Lihao Machine Equipment
In high-speed press automation, material handling precision and stability are critical. The Gripper Feeder is a specialized solution designed to deliver unmatched control and accuracy in metal stamping and forming operations. Lihao Machine Equipment, a leading manufacturer in the metal processing industry, provides advanced Gripper Feeder systems tailored to meet the evolving demands of global manufacturers.
What is a Gripper Feeder?
A Gripper Feeder uses mechanical gripping arms to transport material into a press machine with high speed and accuracy. Unlike roller or servo feeders, the gripper mechanism firmly holds and positions the material, making it ideal for applications involving delicate, coated, or patterned materials that require gentle handling with consistent feeding accuracy.
Why Choose Lihao's Gripper Feeder?
At Lihao Machine Equipment, innovation and reliability drive product development. Our GF-Type New Gripper Feeder incorporates modern design enhancements for enhanced durability, precision, and performance:
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Stable Material Handling: Gripping arms reduce material slip or shift during high-speed feed cycles.
High-Speed Compatibility: Designed for synchronization with press machines running at hundreds of strokes per minute.
Advanced Structure: Compact design allows easy installation and integration into existing press lines.
Low Maintenance, Long Life: Engineered with premium components for long-term use under continuous operation.
Complete Feeding System Support
Lihao offers a full range of industrial feeder solutions beyond Gripper Feeders, including servo roll feeders, air feeders, and cam drive feeders — enabling manufacturers to choose the best solution for their specific production needs.
Industrial Applications
Gripper Feeders from Lihao Machine Equipment are widely used across industries such as:
The gripper design is especially favored where material protection, positional accuracy, and consistent cycle performance are non-negotiable.
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