An underwater pelletizing system produces glass-fiber-filled products. The system reportedly alleviates the wear that occurs during transport and drying of the pellets. It uses a specially constructed centrifugal dryer as well as special coating methods throughout the pelletizing system. The system is said to be reliable for PP, PC, PA, and other products with up to 50 percent glass fiber content, and output capacities of up to 5500 lb/hr.
Robot line uses new operating system, programming language
An operating system and programming language has been designed for the Stäubli line of RX plastics robots. The CS8 control represents a new operating system, and its language, VAL3, reportedly allows simplified programming, tuning, and supervision of robotics.
Meant for work with the CS7B Series, the CS8 is optimal for handling and assembly applications. The system was designed to be adaptable and upgradable, giving it the versatility to take on many different tasks. According to Stäubli, the CS8's primary asset is its open communication ability. It can communicate through PCs using standard interface technologies, including OPC, Active X, and DLL. The CS8 can also interact using the main industrial fieldbus standards of DeviceNet, Profibus DP, Interbus, CANopen, and ModBus.
The VAL3 language created for the CS8 was designed for robot programming and can reportedly handle the complexities inherent in the application. Programming and tuning are said to be rapid, and online help is available at all times to assist the user. The system itself is enclosed in a compact cabinet that can be integrated into the automation cell. All connectors are located on the front of the system and housed behind a single door.
Precise hot runner control capabilities
The 15-zone N-control DPK15 regulates the temperature of 5, 24, or 230V heating up to an output of 3600W. The integrated phase angle control and the short cycle times of the fuzzy-logic PID control reportedly yield high controlling speed, and monitoring functions are designed to promote consistent and trouble-free operation.
Standard equipment includes an automatic lowering function, time-controlled temperature rise, and automatic soft-start for gentle heating. An intelligent start ramp automatically guides the nozzles to the desired operating temperature via the heating manifold. This allows temperature limits to be set for the nozzle circuits, which prevents material damage in high-temperature applications. This also applies to the time-controlled monitoring of an idle machine. If a machine stops, the automatic control reduces nozzle temperatures after a preset delay time. This is said to prevent damage to the plastic material in the hot runner.
If a thermocouple breaks down, a managing function uses zone slaving to regulate the affected zone using the temperature of a comparable zone. The DPK15 also automatically recognizes frozen nozzles.
Günther Hot Runner Systems Inc.
Buffalo Grove, IL
Granulator feed conveyor
A granulator feed conveyor is used in injection molding and blowmolding applications. The conveyor is based on Axmann's belt conveyor type 4081 and is capable of handling plastic scrap up to 250F and loads up to 70 lb/ft. A heavier version of the product can handle up to 100 lb/ft.Accessories include an underbelt metal detector, a hooded metal detector with a metal-free zone, amperage monitors to prevent granulator overload, and gaylord-sized infeed hoppers.
Axmann Conveying Systems Inc.
Additive feeder handles color masterbatch
The Posimax additive feeder is a mechanism for the addition of free-flowing additives such as color masterbatch. It uses a positive displacement channel feeding mechanism to control the flow of material by volume into the process. The unit yields rates of between 2 and 200 l/hr, and linearity over the full operating range. There are no screws or chambers to change to reconfigure dosing rates. Using a principle known as lockup, the Posimax is said to achieve true mass flow and a highly uniform discharge. It has one moving part and is easily disassembled for cleaning.