Temperature sensor touted for small size
Priamus System Technologies LLC has developed a mold cavity temperature sensor that it claims is the world's smallest, called the 4009A/4010A.
The small size is necessary for the sensor to react fast enough for real-time controls. The delay time from when the melt reaches the sensor until the sensor sends a switching signal cannot exceed a few milliseconds, because otherwise, valve gates or core pullers react too late.
According to Priamus of Brunswick, Ohio, it does not make sense to use combined pressure/temperature sensors because they must be separated - cavity pressure is always near the gate, and cavity temperature is usually near the end of the fill, or another area used for control purposes.
Priamus said another temperature sensor, type 4011A/4012A, has the same tiny front diameter as the 4009A/4010A, but a longer measuring body, so it can be used for extremely small mounting proportions.
Crown/CDL planning development facility
Crown/CDL Technology Inc. plans to open a development laboratory at its Addision, Ill., headquarters.
The company will be able to conduct live demonstrations of twin- and single-screw extruders coupled to its Crown underwater pelletizing equipment.
Some processes available in the lab, which is scheduled to open sometime around the end of May, will include ceramic-titanium die designs, dry-face cutting, micro-pellet process development, nitrogen chamber pelletizing and nonimpact drying and cooling.
Under a new branding strategy launched in November, all CDL underwater pelletizing equipment is now known by the Crown brand name.
Crown/CDL said its newly patented designs and innovations in its pelletizers' water chambers, dies, cutter hubs and cutter blades eliminate problems such as die-hole freeze off, the generation of fines and polymer leakage.
The Easy-Flow anti-turbulence water chamber uses pressurized water to provide laminar flow in the direction of blade rotation, reducing the demand for horsepower to run the cutter-head drive. This also creates more consistent, uniform pellets by reducing turbulence inside the water chamber, the company said.
Anti-Freeze Dies use material technology that tolerates higher and lower operational temperature ranges without die-hole freeze off. That increased range allows hotter polymers to flow through the die, and much colder water to impact the cutting surface, the company said.
A Crown Flex-Adjust pneumatic cutter hub-adjustment design gives the operator a high level of control to set and monitor the amount of pressure the cutting blades exert on the die face.
Tel. 630-543-5240, fax 630-546-4656, e-mail [email protected]
PAS offers FS20 for ultrasonic welding
Plastic Assembly Systems of Bethany, Conn., introduced its Model FS20, a pneumatically actuated ultrasonic welding press.
The FS20 has a rigid base to minimize deflection and enhance precision.
The base casting has an integrated hub, increased column diameter and wall thickness, increased throat depth for larger tooling, precision-machined components, rails and bearings.
Tel. 203-393-0639, fax 203-393-0395, e-mail [email protected]
Plasma system treats hard-to-reach places
Corotec Corp. of Farmington, Conn., said its new pulsed-plasma treating system is designed to treat hard-to-reach surfaces of medical devices, like the insides of plastic hubs that hold hypodermic needles and dispensing nozzles.
Those inside surfaces of small areas would be difficult or impossible to treat with conventional methods like corona or flame, the company said.
Tel. 800-423-0348 or 860-678-0038, fax 860-674-5229.
Neutralizer gets rid of static on PET bottles
MKS Ion Industrial said its virtual AC intelligent static neutralizer eliminates static charges on PET bottles so they stay in place on moving conveyor lines.
The high-performance static bars are positioned as far away as 1 foot.
Operators can monitor performance in real time through lighted indicators located on the control module.
In other product news, a new electrostatic charging generator is designed for web-converting operations such as:
* Electrostatically tacking the leading edge of the film web to the core in winding-roll changeovers, without the use of adhesive tape.
* Temporary bonding of two webs together for lamination.
* Compressing plastic bags.
* Pinning heat-shrink wrapping before it is sent to the oven.
* Interlayer adhesion by bipolar charging of the web before roll winding, for telescoping control.
MKS Ion Industrial is based in Windsor Locks, Conn.
Tel. 888-310-3334, e-mail [email protected]
Rotomolders can use Keco coating process
Indianapolis-based Keco Coatings said the Keco 600 Texture Release coating process allows rotational molders to apply a textured finish to fabricated sheet-metal molds.
Previously, in-process texturing was available only when using more-expensive cast aluminum molds.
The textured composite coating can be applied to new and existing rotational molds. It comes in a range of surface finishes and controlled levels of nonstick release, thanks to Teflon.
Tel. 317-356-7279, fax 317-356-6725.
Thinshot nozzle made for high-cavity molds
Polyshot Inc. said its newly designed Thinshot hot-runner nozzle is made for small parts on high-cavitation molds.
The nozzle is available in both valve-gate and open-flow styles. It features a minimum centerline distance of a half-inch between nozzles. Also, the nozzle works with a new heater that allows for simple removal and replacement.
Thinshot nozzles are compatible with most resins, including glass-filled materials, the company said.
Polyshot is based in West Henrietta, N.Y.
Tel. 585-292-5010, fax 585-292-5015, e-mail [email protected]
Cleaner for ink cups runs automatically
Inkcups Now Corp. sells ink cups right ... now - as well as other supplies and equipment for pad and screen printing.
The company, based in Danvers, Mass., has introduced its Autowash ink cup cleaning system. It features an automatic, time-controlled washing cycle, an ``air pulse'' solvent blow off and a separate clean-solvent part rinse.
Tel. 978-646-8980, e-mail [email protected]
Foamazol compound used in rotomolding
Bergen International LLC has debuted a foaming polyethylene for rotational molding.
Foamazol chemical foaming agents can be used with high and linear low density PE skins in rotomolding.
The foaming compound can provide a range of foam densities and wall thicknesses, according to the Rochelle Park, N.J.-based company. The foaming agent in the compound is fully dispersed, providing a consistent cell structure.
Bergen said use of the Foamazol compound allows users to increase wall thicknesses while reducing weight ratio. A rotomolder also can make multiple skin/foam layers.
The compound is suited for two-addition molding systems and drop-box molding systems.
Tel. 201-909-3767, fax 201-909-3769.
Latest TPEs from GLS aim to save money
GLS Corp.'s new, easy-flowing thermoplastic elastomer series is suited for molding long, thin-flow parts for power tools, lawn and garden products, kitchen tools and sports equipment.
Versaflex 9500 boasts good surface appearance, with a smooth, matte finish and minimal surface defects, according to the McHenry, Ill., company.
Users can save money because the series does not require drying and requires less color concentrate for white and pastel colors than with conventional alternatives, GLS said.
The TPE series has a wide processing window and overmolds well to polypropylene, GLS said. Products in the series are sold in natural and black pellets with Shore A hardness grades of 45, 55 and 70.
Tel. 800-457-8777 or 815-385-8500, fax 815-385-8533, e-mail [email protected]
Flame retardant made for engineering resins
Polyvel Inc. has developed a line of nonhalogenated, flame-retardant masterbatches for engineering resins.
The Hammonton, N.J., firm said the products eliminate the difficulties of handling uncompounded flame retardants, which are often viscous liquids, low-melting-point solids or dusty powders. Polyvel's masterbatches are free-flowing pellets suited to polycarbonate, PC/ABS alloys, PET, polyphenylene oxide/high-impact polystyrene and similar resins.
The flame-retardant products complement Polyvel's focus on specialty concentrates for difficult-to-handle additives.
Tel. 609-567-0080, e-mail [email protected]
NEC reinforces PLA using carbon fiber
NEC Corp. has married carbon-fiber reinforcement with the bioplastic polylactic acid to create composite boards with higher heat conductivity than stainless steel.
The Tokyo telecommunications major said the new composite board could be suitable to a range of electronic devices. The board has good heat conductivity only in the board's plane direction, which is difficult to get with a metal board.
NEC said the board's heat-dissipation property could lead to its use in housings. Metal housings have the drawback of also dissipating heat through the housing thickness, possibly leading to localized overheating.
NEC touts the board's high biomass-derived content - more than 90 percent when the carbon-fiber mass is subtracted - as environmentally friendly.
Tel. 212-326-2502, e-mail [email protected]