Vac Generation

Suction rate, nozzle diameter, degree of evacuation, generator intelligence and air or energy consumption! These are only a few of the factors engineers need to consider when determining the best vacuum generation source for a custom-engineered gripping system. 

Automate 2025, showed attendees how to make their industrial plants more efficient with robotics. Throughout the conference, robotic arms shuttled packages, burgers and even macarons with speed and accuracy. Driving this new technology was a complex network of pneumatic cylinders and pick-and-place automation powered by pneumatic vacuum generation. Innovation makes these proven technologies more efficient than ever.

Autonomous Mobile Robots and Automated Guided Vehicles can automate receiving and unloading, picking, stacking, storing and even inventory management. However, there are challenges to powering these vehicles and their attachments. Because they are smaller and lighter, the size of components and the power they need to operate matters. Most AMRs and AGVs are battery operated, so it’s important to balance the need for high efficiency with also providing high levels of torque.

Air-driven Venturi vacuum generators have long been a viable option for fast-response, localized, vacuum-powered systems. Through the last decade, they were considered convenient and flexible solutions with quick response time. However, they were not regarded as energy efficient, probably due to their use of compressed air. Extensive product development with this equipment — particularly the crucial system accessories — often makes the selection of the most energy-efficient items difficult for many localized operations.

This was a complete supply and demand-side system assessment. The supply-side audit involved shutting off old air compressors and purchasing newer more efficient air compressors and dryers. The demand-side audit involved finding ways to improve the piping and reduce compressed air consumption.

Annual plant electric costs for compressed air production, as operating today, are \$3,050,625 per year. If the electric costs of \$27,811 associated with operating ancillary equipment such as dryers are included the total electric costs for operating the air system are \$3,078,436 per year.

Using suction cups and air-driven vacuum pumps is a preferable gripping and handling method of corrugated cardboard materials and boxes in carton-machines like case/carton erectors and rotary cartoners. Robot based applications, like palletizing and de-palletizing, are other examples where the best practice technology for gripping and handling is by suction cups and air-driven vacuum pumps.

This food industry factory, located in California, was spending \$386,533 annually on energy to operate their compressed air system. This system assessment detailed eleven (11) project areas where yearly energy savings totaling \$154,372 could be found with a investment of \$289,540. A local utility energy incentive, paying 9 cents/kWh, provided the factory with an incentive award of \$159,778. This reduced the investment to \$129,762 and provided a simple ROI of ten months on the project.

There is an enormous population of vacuum generators being used successfully by industry. Applications range from pick & place to vapor extraction to bulk material handling and the number of installations is growing. Before proceeding with an installation utilizing these devices, there are two general issues to consider: efficiency and appropriateness.

Swiss brush company Ebnat-Kappel uses non contact transfer technology from Bosch Rexroth to automate a problematic section of its packaging production process.

A recent comparative vacuum technology study performed by Dr. Kingman Yee, as part of a Chrysler Summer Intern Professors Program, found that air consumption could be reduced by 98% when equipping a robot’s end-of-arm tooling with COAXÆ technology and a Vacustat™ check valve.