INNOVATION | MEDICAL
new solutions with the medical industry in mind. The Summit- Series hot runner system features new nozzles with improved thermal profile precision (5% max variation) making it ideal for shear and temperature sensitive resins. The Summit-Series is manufactured entirely of stainless steel and incorporates special coatings throughout to maintain system integrity; this prevents corro- sion from occurring with the hot runner steel and protects against abrasive resins, extending the service life of the mould and ensuring high moulded part quality. They also include iFlow
2pc manifolds, which deliver mould balance, shear distribution, and colour change performance. In a recent customer example, a Summit-Series system incorporating an iFlow manifold was able to achieve precision natural mould balance with a total variation of only 1.7% on a small (0.35 g), difficult-to-mould, highly technical medical rear barrel component.
In the ancillary equipment area, Conair has developed MedLine loaders and receivers to handle smaller throughputs for medical process- ing. The company says that the ML Series loaders and MR Series receivers combine compact, cleanroom-ready design and construction with smaller material capacities and throughputs that make them ideal for medical processing applica- tions on injection moulding machines up to 400 US tons. These new loaders and receivers are specifically designed for easy bolt-on mounting (no drilling necessary) to Conair MicroWheel dryers or other smaller material hoppers. All feature electropolished 304 stainless steel con- struction and are built around a 4.5-inch tubular body that helps ensure smooth, uninterrupted
material flow into attached hoppers. According to Conair, the ML Series
are self-contained vacuum loaders, each equipped with upgraded 3/8 hp vacuum motors and body seals that enable them to convey materials over longer distances – up to 6.1 m (20 ft) – than other loaders of comparable size. The smaller ML-1 loader provides
material throughputs of up to 34 kg/h (75 lb/h), while the larger ML-2 loader is equipped with a 5-inch-tall glass exten-
sion that boosts their throughput to up to 45 kg/h (100 lb/h). MR Series receivers are designed to
operate as part of a central vacuum-conveying system. Material is delivered through a top- mounted vacuum sequencing valve, which can swivel in any direction to simplify hose installation. A quick-disconnect clip opens the hinged lid, swinging the vacuum valve out of the way for easy access to the receiver body and filter screen for maintenance. The MR-1 receiver has a material-holding capacity of 0.45 kg (1 lb), while the larger MR-2 receiver has a 5-inch-tall glass extension that increases its capacity to 0.9 kg (2 lb). A discharge valve, mounted on the bottom of the receiver, incorporates a demand switch that automatically replenishes the receiver and hopper. There are several materials suppliers active in the medical moulding sector. Americhem has developed a selection of biocompatible (compliant to USP Class VI, ISO 10993 standards) materials for medical device manufacturing. The ColorRx line features pre-selected biocompatible resins and medical/FDA-compliant pigments and additives. The line is produced under the company’s ISO 13485 manufacturing certificate and is available globally through certified Americhem facilities in
Left and below: Conair has developed MedLine loaders and receivers to handle smaller throughputs for medical processing
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EXTRAORDINARY TECHNOLOGIES FOR TODAY’S PLASTICS
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