The majority of current rubber magnetic sheet punching and forming processes rely on single-punch techniques. This method involves setting a positioning pin on the punch press mold and manually placing a rubber magnetic sheet onto the pin. The operator uses both hands to press the punch press start button, initiating the punching process. After punching, the product is removed from the mold, and another rubber magnetic sheet is placed into the positioning slot or pin for the next punch. While this method ensures operator safety, it is inefficient and results in a high proportion of edge material, increasing production costs.

Transitioning to Progressive Punching Techniques

To address these inefficiencies, the industry is shifting from single-punch to progressive punching techniques for rubber magnetic sheet manufacturing. Progressive punching requires the use of a punch press feeder. Among the various feeders available, an air feeder is recommended for this process. An air feeder uses the up-and-down reciprocating motion of the punch press slider to press and release a floating rod. This rod transmits pressing and releasing signals to a time relay, which then controls the driving device, enabling continuous automatic feeding. This method eliminates the drawbacks and safety risks of manual feeding, significantly reducing the labor intensity for operators. It also enhances stamping production efficiency, as the air feeder achieves precise positioning and equidistant feeding. This reduces edge material generation, improving material utilization and reducing stamping production costs.

How Air Feeders Improve the Punching Process

In practical use, rubber magnetic sheets are fed by the air feeder’s material rack, passing sequentially through the material blocking wheel, moving clamp plate, and fixed clamp plate, and are placed on the working table on one side of the punch press slider for punching. Proper adjustment of the air feeder’s material blocking wheel ensures accurate positioning of the rubber magnetic sheets.

Initially, the air feeder’s moving clamp plate is positioned close to the positioning baffle. The rubber magnetic sheet passes through the gap between the first moving clamp plate and the second moving clamp plate, and between the first fixed clamp plate and the second fixed clamp plate. When the punch press start switch is activated, the punch press slider moves downward to perform the punch, driving the guide plate downward. The guide plate presses the floating rod, generating downward pressure. This pressure signal is transmitted via the control button to the time relay. The time relay first controls the lifting cylinder, moving the first moving clamp plate downward to clamp the rubber magnetic sheet, causing it to move with the moving clamp plate. Then, the time relay controls the air feeder’s telescopic cylinder to move the second moving clamp plate towards the base, further moving the rubber magnetic sheet in the same direction. The first and second fixed clamp plates clamp the rubber magnetic sheet to prevent wrinkling, which could affect the punching quality.

Achieving Fully Automated Stamping Production

After the punch press slider completes the punching, it moves upward, driving the guide plate upward and releasing the air feeder’s floating rod. The floating rod then transmits the release signal via the control button to the time relay. The time relay first controls the lifting cylinder to move the first moving clamp plate upward, returning to its initial position and releasing the rubber magnetic sheet. Then, the time relay controls the telescopic cylinder to move the second moving clamp plate back towards the support, returning to the initial position. This cycle repeats, achieving fully automated stamping production.

In conclusion, transitioning from single-punch to progressive punching techniques in rubber magnetic sheet manufacturing significantly enhances production efficiency, reduces labor intensity, and lowers production costs. By employing an air feeder, manufacturers can achieve precise positioning and equidistant feeding, resulting in improved material utilization and higher quality products.

Punching Technique
Punching Technique