TECHNOLOGY | HOT RUNNERS
Right: Mold- Masters’ co-injection nozzle
combines two resins in three-layer melt stream
light blocking barrier materials as the core layer for PET bottle applications. Light blocking barriers reduce light transmittance by up to 99.9% to extend product shelf life and preserve freshness and flavour of dairy products. It currently offers co-injection PET preform hot halves to inject light blocking barriers as the core layer. By co-injecting the light blocking black layer, there is the opportu- nity to take thickness out of the container and achieve the same light blocking performance with a thinner wall. This translates into a lower cost package through the potential for overall material cost savings. The co-injection technology can also be used for incorporating recycled material into mouldings. The group says its system can inject up to 50% of core with recyclate. At Fakuma, a live demonstration on the Arburg
stand featured Mold-Masters’ new Symfill technol- ogy. This minimises core shift to improve part quality (straightness) of cylindrical, centre injected compo- nents having an aggressive L/D ratio. It achieves this by allowing the melt to enter the nozzle runner channel from multiple sides as opposed to the single-entry point of traditional designs. It says examples of applications that would
Right: The new TempMaster- ME hot runner temperature controller from Mold-Masters
benefit from this technology include blood tubes, needle shields, over caps and other similar parts from the medical, cosmetic and stationary industries. On recent blood vial applications that used Symfill, barrel bow was reduced by up to 90% (as little as 0.15mm) by eliminating core shift, it says. Also on display at Fakuma were TempMas- ter M3 and ME temperature controller platforms. The M3 incorporates new features including TC-Connect technology that eliminates the need for traditional T/C control cables altogether, reducing cost, weight and clutter from the moulding cell. TC-Connect uses a new eBox design that attaches to the mould. A single, thin and lightweight data communication cable (similar in
42 INJECTION WORLD | November/December 2021
size to ethernet) connects from the back of the M3 controller to the eBox. It is compatible with new and retrofit hot runner systems. The new TempMaster-ME is the simplest and most economical hot runner temperature controller for low cavitation moulds in the Mold-Masters portfolio. The ME controller provides essential features for low cavitation moulds (12 zones maximum) in a compact and lightweight package. Units can be ordered with 6 or 12 zones (15-Amp per zone) and any choice of mould plugs. Its touch screen control has key production and safety features including Soft Start, Wet Heater Bakeout, Continuous Ground Fault Detection, Overload Protection, Automatic Tool Diagnostics, Plastic Leak Detection and Tool Storage. Fakuma 2021 provided a platform for the first hot runner developments from Oerlikon HRSflow since the multi-industry Oerlikon group acquired Italy-based INglass and HRSflow in April this year. The new S series hot runner systems have a low space requirement in the mould and are targeted at production of small-format technical components. Depending on the application, the new S series can be equipped with screwed-in or non-screwed- in (face-to-face) nozzles. The inner bore size can be selected according to the shot weight. The design allows a compact mould structure with a minimum nozzle pitch of 37 mm. In the valve gate version, the S series is combined with either a compact cylinder 62 mm high or, in the version with adjust- able needle position, with a 70 mm high cylinder. Extensive internal laboratory tests have ensured an optimal sealing and thermal profile along the whole nozzle. In addition, a special channel geometry enables fast colour changes. The company says the new S series is suitable for low shot weights, multi-cavity moulds and thin-walled components. Typical applications include consumer goods, technical and electronic components as well as small automotive parts such as emblems, interior switches, knobs for sound systems or air conditioning components.
www.injectionworld.com
IMAGE: MOLD-MASTERS
IMAGE: MOLD-MASTERS
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52
