Multishot molding technologies are at the forefront of new developments in automation and streamlined production. To give molders more opportunities to see them in production, tooling specialists, their customers and machinery makers are teaming up for demonstrations at NPE 2012 in Orlando, Fla.
Austria's Haidlmair GmbH (Booth 9147): specializes in injection mold tooling and technology for containers, having produced more than 1,000 molds for bottle crates during the past 20 years, incorporating multi-material injection molding and in-mold labeling for containers.
At its booth, Haidlmair will show a range of container-manufacturing options in both rigid and foldable designs, while Wittmann Battenfeld Inc. (Booth 2843) will use a Haidlmair tool in production at its booth.
The mold at Wittmann Battenfeld will demonstrate a stackable folding box for the fruit and vegetable logistics market, with five different components — the base plate and four side walls — produced at once in a family mold.
Seven different companies are joining forces to show their united capabilities in a multishot button mold being shown by MGS Manufacturing Group (Booth 63030).
The 32-cavity, high-performance injection mold tool uses twin-spindle servo-driven rotary indexing in a SpinStack mold, using Gram Technology Inc.'s system. MGS uses its own Universal Multishot System on a Krauss-Maffei Corp. (Booth 1503) press.
Thermoplay SpA and Alba Enterprises Inc. (Booths 1170, 1583) worked on the hot-runner systems and Edro Engineering and Specialty Steel Inc. (Booth 51043) supplied the RoyAlloy stainless-steel mold plates.
The finished multishot button weighs 0.08 gram and is produced in a 12-second cycle using shuttle molds with insert molded aluminum parts.
Mold-Masters Ltd. (Booth 4463) will feature a full cell in production to show its new coinjection technology for medical, beverage and food applications.
Mold-Masters calls the new coinjection process Iris and will produce high density polyethylene closures in a 16-cavity closure mold. The system incorporates the Iris coinjection hot runner, an E-Multi secondary injection unit and an E-Drive servo-driven valve gate integrated into a single control unit.
The Iris system molds a cap with a 3-6 percent ethylene vinyl alcohol copolymer barrier encased in its center, which creates a performance cap, rather than relying on a secondary operation to insert or mold a liner.
F&S Tool Inc. of Erie, Pa., designed and built the tool. The part will be made on a press from Engel Machinery Inc. (Booth 943) using HDPE provided by PolyOne Corp. (Booth 39006). Switzerland's IMD Ltd. provided testing equipment used as part of the on-site production cell.
Mold-Masters' Iris system also will be used in demonstrations at JSW Plastics Machinery Inc. (Booth 463) using a mold produced by NyproMold Inc. (Booth 4263).
CBW Automation (Booth 3169) will run a 16-cavity automated system using Mold-Masters' Melt-Cube technology, a side-gate product for linear side gating.
Zahoransky Formenbau GmbH (Booth 591) will show its Total Integrated Manufacturing stack mold at its own booth and at the booth of machine maker Krauss-Maffei.
The TIM stack mold consists of two mold halves with an axial rotary cube, which allows for two different parts to be made on a single mold. The cube is then aligned with two assembly platens located outside the mold. The configuration allows automation of complex assembly processes as well as potential functions involving screw-connecting parts or leakage tests.
The cube itself rotates once to the right by 90 degrees and once to the left by 90 degrees and transfers finished molded parts after each injection step to the two assembly units.
Zahoransky said that with the TIM system, the complexity of the mold is reduced because the assembly units are positioned outside the mold.