Plastics Technology

JAN 2019

Plastics Technology - Dedicated to improving Plastics Processing.

Issue link:

Contents of this Issue


Page 14 of 60

because they have twice as many hoses as a regular tank and take even longer to clean. With our new system, you turn on the water pump, open the tri-clover three-way valve, and use the water pump to drain the water from the entire system." The water pump is made of 316 stainless steel—another standard feature—and can be taken apart and cleaned with ease during flushing. The water pump is mounted on vibration dampers to minimize tank vibration. It's positioned below all reservoirs to enable total draining while eliminating cavitation. An inverter is supplied as standard, allowing the pump to run at half speed, which keeps it always operational, to minimize water stagnation and thus further extend the time between flushing procedures. A three-way valve enables the water pump to empty the system entirely to enhance the flushing procedure. Filtration is provided in series with 5, 2, and 0.5 microns, and a UV filter is furnished standard. The base frame also comes standard in stainless steel to make cleaning/wipe-down easier. Stainless-steel casters with non- marking urethane wheels make it easier to move the tank in a cleanroom. VACUUM OPTION With the addition of a vacuum system, these tanks can be used for non-contact or con- tact vacuum calibration with vacuum levels up to 130 in. of water as standard. The regenerative vacuum unit operates below 75 db even at maximum vacuum levels. The standard closed-loop system controls vacuum to 0.01 in. of water with a fully automatic vent-valve system to maintain the vacuum pump within its optimum CFM curve, thus optimizing performance and vacuum stability. With this precision vacuum stability, water drool can be eliminated (if necessary) to optimize tubing concentricity and/or ovality. Customized tooling will be available to further enhance this process with a new tool-less and thread-less mounting system. The controls even incorporate a servo-driven linear actuator to enhance repeatability of the gap between the hot die and tank. A handheld, wireless tablet is used for this opera- tion, which includes a recipe to record previous settings. "The distance from the hot face of the die to where the tube first enters the tank—known as the hot gap—is a validation point," Bessemer explains. "Operators measure that and typically have used a hand-wheel to move the tank back and forth. We've made all of that unnecessary with the tablet." A digital water-temperature readout is also available as standard. An optional water-temper- ature control unit can be added to allow control within 1° F. MICRO MEDICAL PULLER/CUTTERS Downstream of the tank, the new puller/cutters represent what Bessemer calls "an attempt to enhance the operation and update features to what we believe should be the standard for processing of medical tubes, especially for heart and brain devices and diffi- cult-to-process materials with extremely thin walls." The units will be offered with either a 6- or 12-in.-long puller assembly. The cutter with be available in either a 0.75-in. or 1.25- in. OD bushing size. Standard features include a stainless-steel base cabinet, which also serves as the electrical enclosure and is totally sealed and water tight. Urethane non- marking casters are said to be ideal for use in a cleanroom and come furnished with an integrated locking device to improve ease of moving from line to line without need to raise and lower the unit to transport it. "Operators measure the hot gap and typi- cally have used a hand- wheel to move the tank back and forth. We've made all of that unnec- essary with the tablet." HOW DOYOU GET THE LOWEST PRODUCTION COST FROM SCRAPTO PELLET w w w. a d g s . n e t 12 JANUARY 2019 Plastics Technology Close -Up On Technolog y

Articles in this issue

Links on this page

Archives of this issue

view archives of Plastics Technology - JAN 2019