Brown Machinery patents roller screw
Brown Machinery LLC has been awarded a patent for its single-roller screw design, for actuation of independent third-platen, plug-assist motion.
Brown makes thermoforming machinery in Beaverton, Mich.
The plug system is driven by a single-roller screw, driven by a servo motor. The platen is guided by eight linear bearings, incorporating quick-change cylinder locks for attachment to the tooling plug plate.
The patented technology provides higher stiffness, great load capacity and longer, more dependable operation for continuous thermoformers that require third-motion applications, according to Brown.
Brown has incorporated the design in all Brown CS and SRS thermoforming machines with third-motion capabilities.
Other advances of the roller screw include:
* Rollers are made with the same threat angle as the nut, ideal for high-load, high-speed applications.
* Fixed screws allow the roller screw to work at higher revolutions per minute than ball screws.
* Roller screws can give a much longer service life, with higher load capacity and multiple contact points.
Tel. 989-435-7741, e-mail [email protected]
Priamus expands line of mold sensors
Priamus System Technologies LLC has extended its line of mold-cavity temperature measurement systems, with new waterproof sensors.
Users can clean the sensors easily and safely in the ultrasonic batch. Also, the sensors can be mounted in the cooling circuit.
The quick-connects also are waterproof.
Priamus is based in Brunswick, Ohio.
Sepro: Latest robots are easy to control
Sepro America LLC of Pittsburgh said its new SR series of sprue-picker robots have an easy-to-use proprietary control system.
Injection molders can easily program virtually any sequence of robot movements, and store up to 20 such sequences for recall later.
The pickers are available in three different models, for handling parts on injection presses with clamping forces from 20-450 tons.
The smallest one, the SR 55, offers a vertical stroke up to 21.5 inches and a strip stoke up to 3 inches. It can handle payloads up to 2.2 pounds.
The SR 65 has a vertical stroke up to 25.5 inches. The largest model, the SR 85, has a reach up to 32.5 inches. Both the SR 65 and SR 85 feature a 6-inch maximum strip stroke and top payload of 4.4 pounds.
The SR robots achieve takeout times as fast as 0.7 of a second, with an overall cycle time as short as three seconds.
Using a hand-held pendant, operators are guided through the setup process step by step, to maintain safety rules and prevent motion conflicts.
Tel. 412-459-0450, fax 412-459-0470, e-mail [email protected] america.com.
Advance Tool to use SpinStack technology
Advance Tool Inc. has joined with Gram Technology Inc.'s Mold Making Alliance Group to manufacture molds with the Gram SpinStack technology.
Advance Tool will use SpinStack for customers in the medical, packaging and consumer products markets.
Gram Technology of Scottsdale, Ariz., developed SpinStack, a rotating mold technology for multishot molding and in-mold assembly.
Advance Tool is based in Blaine, Minn., and the company also has production in Asia.
Tel. 763-780-1213, e-mail [email protected]
Company offering side-gating nozzle
Mold Hotrunner Solutions Inc. of Georgetown, Ontario, said its hot-runner nozzle, the Rheo-Pro N08 Star Gate, is specially engineered for high-cavity molds that require multiple side gating into the walls of the mold cavity like long and tall tubular parts such as syringe barrels and medical applicators.
The four tip side-gate method eliminates cold-runner material that is typical for these type of parts, the company said.
Special star-shaped tips are embedded in a melt-insulator bubble.
The gates and tips can be serviced directly from the mold parting line or cavity side, making mold integration and mold maintenance easier.
Tel. 905-873-1954, fax 905-873-0131.