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How a Craft Brewery Switched from Bottles to Cans

A streamlined can-filling system with updated PLCs, drives and HMIs helped improve system visibility, filling accuracy and product quality.

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Microbrewing began expanding rapidly across the United States in the 1980s. And Lakefront Brewery was one of the first craft brewers to set up shop in Milwaukee — a city known for its rich beer heritage. 

Established in 1987, Lakefront offers more than 20 different beers in over 30 states and distributes to multiple countries. The brewery is known for its ales, lagers and brewery tour.

From the beginning, Lakefront packaged its shelf-stable offerings in glass bottles. Recently, company leaders opted to transition to cans as a more economical, efficient and environmentally friendly choice. Cans also maintain better quality, because no light can enter the can and degrade the product.

To make the switch, Lakefront  contacted KHS Group, the same original equipment manufacturer (OEM) that delivered the existing bottling line 10 years ago. KHS Group is a global manufacturer of filling and packaging systems for the beverage and liquid food industries. The company’s subsidiary, KHS USA, is headquartered in Waukesha, Wisconsin, and is an OEM Partner in the Rockwell Automation PartnerNetwork™ program.

Conserving Space

Transitioning from one packaging paradigm to another is challenging under any circumstances. But space constraints at the Lakefront operation, housed in a historic 1908 power plant, added to the complexity.

“Our space is quite limited,” says David Karrer, director of brewing operations. “That was a driving factor in our technology decision. We required a solution with a compact footprint.” 

In addition, Lakefront didn’t have the space to run the existing bottling line and new canning application concurrently.

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“We had to remove our entire bottling line and start over with the new system,” Karrer adds. “To maintain as much productivity as possible, we obviously needed a solution that was easy to install and use.”

To simplify installation and integration with other equipment in the brewery, Lakefront leaders specified a Rockwell Automation control solution for the entire canning line.

Ongoing Improvements Match Requirements

KHS installed its updated Innofill Can C filler, designed for craft brewers, at Lakefront’s plant. The filler fills and seals between 10,000 and 60,000 cans per hour. In addition, the machine’s compact design accommodates the 13-ft. x 7-ft. space available at the facility.

“Our Innofill Can C system [fits] in one self-contained skid,” says Brian Anderkay, electrical engineering manager, KHS. “Its combination of size and speed allows higher output capacity when space is at a premium.”

Coincidentally, KHS USA was already working on transitioning the machine’s control system to a Rockwell Automation solution when Lakefront approached the company about the project. The original system included Rockwell Automation components, but also a third-party HMI system and fill computer. The dedicated fill computer provided inputs and outputs, but the logic used to generate the output was not visible. As a result, the system was difficult to maintain.

 can-filling machine from KHS Group installed at Lakefront Brewery

KHS replaced its existing bottling system with this compact can-filling machine running on a single control platform.  

To improve system visibility, usability and troubleshooting, the updated filler includes an Allen-Bradley® GuardLogix® safety controller, Kinetix® 5700 servo drives and PowerFlex® 525 AC drives. The system runs on an EtherNet/IP™ network and is monitored by FactoryTalk® View HMI software on an Allen-Bradley PanelView™ graphic terminal.

To incorporate the fill computer logic into the main controller, KHS rewrote the program from the ground up.

“Our goal with the rewrite was to keep all functionality of the original machine, while simplifying the actual troubleshooting of the code and overall operation,” notes Matthew Herrick, electrical engineer, KHS.

Fast Installation, Improved Accuracy

With the Rockwell Automation platform in place, KHS completed installation and commissioning in under two weeks. The 21-valve system runs at a rate of 230 to 235 cans per minute to match upstream processing speed.

The switch from bottles to cans also improved fill accuracy. Instead of measuring the product, the bottler used vent tubes to achieve a specific fill level. The canning technology measures product volume using flowmeters.

“As a result, we can individually dial in every single valve to improve consistency,” explains Tom

Giese, plant engineer at Lakefront Brewery.

In addition, Lakefront leaders anticipate they’ll be able to handle most maintenance issues with in-house staff.

“Luckily, we haven’t had to really troubleshoot yet,” Giese notes. “But I can see that troubleshooting and maintenance will be much easier, since everything uses one software and control platform.” 

And Lakefront knows they can rely on KHS for support if needed. 

 

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