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PET Equipment

Heat Set Testing Hot Fill Machine

Keystone was approached by a major PET bottle manufacturer to develop a Hot Fill machine to do heat set testing on PET bottles and jars. The bottling industry has been shifting over to a practice of filling bottles with liquid ranging in temperature from 183 degrees to 199 degrees. The bottles have to be able to withstand the temperature swing from a quality standpoint. The Hot Fill machine will need to fill bottles with hot water at precise temperatures. We made 3 site visits to different plants located around the country and gathered ideas and best practices from each plant. The designs were reviewed, modified and approved by corporate quality managers and a prototype of each machine was built and delivered. We have made some improvements to the original designs and currently have these systems in operation across the US, Mexico, Canada and Brazil.

Our brochure is included for review. Please contact us for further information, pricing and specifications.  Video Link at: http://www.youtube.com/watch?v=nHCWJvocR2A

Quench Cooler

As part of the heat set testing requirements used with the Keystone Hot Fill machine, we developed a bottle cooler. Current practices ranged from using plant water in a deep sink to spray systems without temperature controls. Keystone Automation designed an economical system that continuously chills the latent heat picked up from the hot bottles of water. This allows for a consistent temperature when cooling the bottle without wasting water. The Bottle Coolers have preset timers, plus the ability to manually set the cycle time. A separate chiller is provided with the system. The chiller temperature can be adjusted for proper cooling of the bottles.

Our brochure is included for review. Please contact us for further information, pricing and specifications.

Dunnage Sorter

This machine was design and manufactured from an idea generated by a local PET container manufacturer. The end result was achieved through the combined efforts of our engineering staff working closely with the plant engineering and maintenance departments. We developed a concept to sort dunnage and estimated cycle times. After corporate approval and design work started, we improved the original concept to ensure it was robust and maintenance friendly. Once fabrication was complete, we ran a multitude of product through the machine to make sure it performed flawlessly. After installation, we trained operators and refined the design even further. The machine worked so well we received an order for 13 additional machines later that year.

Our brochure is included for review. Please contact us for further information, pricing and specifications.

To see the dunnage sorter in motion please follow the link: http://www.youtube.com/watch?v=lZhRIg1kOjE

Dumper Guarding

Our dumper guarding solution is an improvement to many existing safety guard installations in the PET industry.

Most plants use a tilting dumper (also called hoppers) to dump pre-forms into the feeders to the blow molding machines. A Gaylord container is loaded into the dumper and the hopper is pivoted upward.

Some have automatic controls and others are operated by a joystick. Most use hydraulic controls to tilt the dumper. What we found was there was NO method employed for keeping someone from going under the dumper while it was tilted. Light curtains or photo eyes were installed on the front but they do nothing to prevent entry – merely sound an alarm.

We developed a 3 sided safety guard with a roll up door in the center. The door is not allowed to open unless the dumper is down. The dumper is not allowed to raise until the door is down. We use two different category 3 safety circuits to verify dumper and door safe positions. We offer manual or automatic controls for it.

We can also convert old hydraulic joystick controls over to solenoid driven and automate the dumper using photo eyes. Please review our brochure and contact us for more information and pricing.