Additive Manufacturing

MAR 2018

ADDITIVE MANUFACTURING is the magazine devoted to industrial applications of 3D printing and digital layering technology. We cover the promise and the challenges of this technology for making functional tooling and end-use production parts.

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Page 51 of 67

MARCH 2018 Additive Manufacturing RAPID 2018 ON DISPLAY 50 Extrusion Head Enables Polymer Printing on Machine Tools Hybrid Manufacturing Technologies, Booth 1543 Hybrid Manufacturing Technologies offers a patented approach for polymer extrusion in a machine tool, devel- oped with the support of Oak Ridge National Laboratory's Manufacturing Demonstration Facility (ORNL's MDF). The Ambit PE-1 is pellet-fed and said to offer volumet- ric deposition rates as much as 200 times that of desktop polymer extrusion printers. High deposition rates are achieved by using an extruder to plasticize thermoplastic composite materials, enabling print rates not that are not practical with conventional filament-fed heads, the company says. The extrusion head enables the rapid pro- duction of near-net parts, tooling, jigs and fixtures. When coupled with machining, the PE-1 extruder eliminates the stair-stepped surface finish inherent in polymeric material extrusion. According to Hybrid Man- ufacturing, this encourages even higher deposition rates and makes industrial production practical. These heads offer a wider selection of feedstock suppliers and materials by leveraging the same pellet feedstock form used for injection molding. Pellets are typically significantly less costly than filament feedstock materials, the company says. Hybrid Multitasking Machine Offers Five Axes Mazak Corp., Booth 2004 Mazak presents its VC-500 AM, a hybrid multitasking machine that combines five-axis capability with addi- tive manufacturing technology. The machine is said to enhance product design, reduce time to market and cut R&D costs. The VC-500 AM machine quickly builds part features to near-net shape, without wasting expensive material or losing time by subtracting large amounts of metal from a solid piece of material using conventional machining, the company says. The machine offers geometric freedom via direct metal deposition, which enables both additive and subtractive machining capabilities in a single setup. The laser cladding heads of the VC-500 AM reside side- by-side with the subtractive machining spindle. For additive manufacturing, the VC-500 AM uses fiber laser heat to melt the chosen metal powder and grow near-net-shape 3D forms. The cladding head applies the molten material layer by layer, all of which solidify as the desired part surface or features grows. The la- ser cladding head can also be used to coat chosen sections of the part with metal, allowing the machine to repair worn or damaged high-value components. Constructed on a compact five-axis platform, the VC- 500 AM accommodates a variety of part sizes and shapes ranging to to 19.7" in diameter and 12" in height, and weighing as much as 440 lbs. According to Mazak, the machine is ideal for manufacturers who require optimum part finish and high accuracy and is also well-suited for educational institutions and research and development facilities.

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