Compreendendo três tipos de alimentadores perfuradores: prós e contras

Understanding Three Types of Perforator Feeders: Pros and Cons

The feeder is a fundamental auxiliary equipment for the automatic operation of a punching machine. Due to the wide variety of punches, the wide range of materials that can be processed, and different processing technologies, many types of feeders have been developed.

Punch Feeder Types

There are several types of press feeders, including air feeders, roll feeders and NC servo feeders. In this text, we will explain the operating principles of these three common models to help customers make informed choices and use them effectively.

1. Air feeder

Air feeder is also known as pneumatic feeder.

Its principle is similar to that of a medical syringe. It uses an external source of compressed air as a power source, which presses the floating rod downwards through the driving rod installed in the punch sliding block. The five-hole valve is then operated to control the direction of the compressed air, finally achieving the purpose of intermittent feeding.

Advantages of air handler:

The cost is reasonable and affordable, and with minimal investment, punch production can be automated.

Disadvantages of air supply:

  • Slow feed speed: The feed speed is slow as the external air source has limitations in terms of pressure and flow, making the air feeder's action cycle longer and unable to meet high speed feed demands. It is only suitable for low speed strokes.
  • Poor and unstable feeding accuracy: The working principle of the push type pneumatic air feeder involves clamping and pushing the material at the same time, leading to push feeding when the material is not fully clamped. This can cause the material to slide unpredictably during the pushing process, resulting in poor feeding accuracy. Furthermore, the air handler contains many vulnerable parts such as O-rings and seals, which are prone to air leaks and other failures if not maintained properly, leading to unstable machine operation.

2. Roll feeder

Roll Feeder is also known as Mechanical Feeder.

Roll Feeder

Its principle is similar to grinding tofu with a stone. The drive rod is driven by the punch output shaft and pulls the roller rocker, which in turn drives the drive shaft. The reciprocating movement of the transmission shaft is transformed into a unidirectional feeding movement of the feeding roller by the unidirectional device. In addition, the feed roller is equipped with a brake device to prevent the feed roller from moving backwards.

Roller feeder advantages:

The Roller Feeder offers high cost-benefit and does not require an air source or additional power. It also has a high level of mechanical transmission stability and a low failure rate.

Disadvantages of roller feeder:

  • Necessary Adjustment After Shutdown: After shutdown, the feeding step must be adjusted by the eccentric disc installed on the punch output shaft. This process may require several adjustments for calibration.
  • Limited installation: The roll feeder has limitations in terms of installation, and the applicable material width, thickness and feeding step are strictly regulated.

3. NC Servo Feeder

NC servo feeder

NC Servo Feeder, also known as NC Feeder, uses a feed roller driven by a servo motor to perform the feeding action. The servo motor is controlled via a touch screen and a PLC (Programmable Logic Controller).

Advantages of NC servo feeder:

  • Easy to operate with touchscreen settings
  • Wide range of applications
  • High level of customization
  • High feeding precision
  • Good stability
  • Capable of multi-stage feeding
  • High feeding precision
  • It can transport sheets of any length.

Disadvantages of NC servo feeder:

  • High cost: The cost of using just a servo motor is significantly higher than an air feeder and a roller feeder.
  • Slow Feeding Speed: Feeding speed is slow and affected by the response of the servo system, making it unable to meet high-speed feeding demands.

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