World of Cans
The Necker
In this video, we're going to talk about the Necker, one of the fastest machines in the can plant, with newer models capable of running at speeds exceeding three thousand cans per minute.
Cans begin their journey into the Necker on the upper level, where they start out as a mass of cans. This mass moves through a single filer before entering an air tunnel track, which can transport cans at incredible speeds. Once in the air tunnel track, the cans descend into the infeed of the Necker.
Cans begin their journey into the Necker on the upper level, where they start out as a mass of cans. This mass moves through a single filer before entering an air tunnel track, which can transport cans at incredible speeds. Once in the air tunnel track, the cans descend into the infeed of the Necker.
Waxing Process
Upon entering the Necker, the cans first pass through a waxer that applies a thin coating of wax or mineral oil onto the top edge of each can. This food-grade lubrication ensures that the metal forming process inside the Necker is smooth.
Neck Forming Process
The primary purpose of the Necker is to transform a straight-walled can into one with a fully formed neck. This process involves multiple stages rather than a single step, utilizing two tools: the necking die and the knockout. Together, these tools ensure that each neck is formed smoothly, without plates or puckers.
Once the neck is fully formed, the next step is to create the flange on the can, which will eventually receive the lid or end at the filler after the product is added.
Once the neck is fully formed, the next step is to create the flange on the can, which will eventually receive the lid or end at the filler after the product is added.
Reform Station
A reform station is incorporated to ensure that the dome of the can does not expand at lower pressures. This station applies pressure to the inside surface of the dome, slightly altering its profile to prevent expansion.
Inspection Stations
Most modern Neckers are equipped with inspection stations to monitor can quality. One such station employs a high-speed camera to inspect the inside of the can, identifying dents, defects, and any anomalies. Another inspection station, known as the light tester, uses light to detect tiny pinholes on the metal surface, ensuring that a can that appears intact does not leak after being filled with a beverage.
Neckers with inspection capabilities also include an air-activated reject station that uses compressed air to blow off defective cans after they leave the Necker.
Finally, cans exit the Necker through the air tunnel track and ascend to the second level, continuing their journey in the production process.
Neckers with inspection capabilities also include an air-activated reject station that uses compressed air to blow off defective cans after they leave the Necker.
Finally, cans exit the Necker through the air tunnel track and ascend to the second level, continuing their journey in the production process.
