Making the case for lead screws

Oct. 26, 2006
Case-packing machines must work fast and efficiently, and withstand the hustle and bustle of high-speed production.

Using Kerk's VHD lead screws on the case packing machine let RPT increase speeds, reduce bottlenecks, and eliminate grease and oil which trapped dust during tissue-box packaging.

The packer at a tissue manufacturer, for instance, was fed by a dual-conveyor setup designed by RPT Motion, Quebec. A two-position lane changer let product from one conveyor and then the other feed the case packer. But actuation was slow and the lane changer became a bottleneck.

The manufacturer wanted to install a second case packer to alleviate the problem, but the lane changer could not accommodate four lanes. It required a 40-in. stroke with indexing about every 10 sec or less for smooth product flow without enlarging the machine.

To find a solution, RPT teamed up with Kerk Motion Products, Hollis, N.H. to replace a ballscrew-and-nut lane changer with a lead screw. The existing design did not have a high enough pitch for fast operation, so the two companies collaborated to fit Kerk's VHD lead screws and nuts into the RPT Modular Slide System. This created a smooth running, high-speed, servo-powered system, with an anti-backlash lead screw assembly.

To meet the high speeds required, RPT chose a 0.75-in. diameter screw with a 2.4 in. travel/rev, with the same efficiency as a ball-nut configuration.

The servo-powered system hit the speeds necessary to accommodate the second case sorter and subsequently eliminated the manufacturer's bottleneck. It also combated environmental challenges, wear, and damage, and lessened the noise around the machine.

Sponsored Recommendations

A closer look at modern design considerations for food and beverage

April 9, 2024
With new and changing safety and hygiene regulations at top of mind, its easy to understand how other crucial aspects of machine design can get pushed aside. Our whitepaper explores...

Condition Monitoring for Energy and Utilities Assets

April 9, 2024
Condition monitoring is an essential element of asset management in the energy and utilities industry. The American oil and gas, water and wastewater, and electrical grid sectors...

Strategizing for sustainable success in material handling and packaging

April 9, 2024
Download our visual factory brochure to explore how, together, we can fully optimize your industrial operations for ongoing success in material handling and packaging. As your...

Fueling the Future of Commercial EV Charging Infrastructure

April 9, 2024
Miguel Gudino, an Associate Application Engineer at RS, addresses various EV charging challenges and opportunities, ranging from charging station design strategies to the advanced...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!