Large-format 3D printer OEMMassive Dimension迄今为止，已经推出了其功能最强大的直接打印粒子挤出机。
被称为MDPE10, the pellet-compatible extruder is designed to be integrated with CNC machines and robotic arms such as the公司自己的印刷单元格, which is still in development. The device is priced at $13,499 and is expected to begin shipping by the end of 2020.
基于颗粒的挤出的好处
基于细丝的3D打印机虽然更为常见，但由于细丝饲料系统的吞吐量限制，其印刷率往往受到限制。这是基于颗粒的挤出的地方，从而融化并挤出了颗粒状的聚合物材料。颗粒打印机与大喷嘴直径结合使用，可以打破这些局限性，并为大零件提供更高的体积生产 - 概念巨大的尺寸全心全意地运行。
There is also the issue of recyclability. The filament drawing process requires melting the plastic, which degrades the mechanical properties of the material with every cycle. In the case of ABS,五个周期之后，化学降解开始承受聚合物链开始崩溃。通过使用颗粒，由于无需融化材料，因此该问题完全绕开了 - 用户可以在低温下将其切成薄片。
MDPE10挤出机
与Massive Dimension的大幅面理念一致，MDPE10的流速为每小时10磅mdph2extruder. As such, it was primarily developed to facilitate large polymer part production, and contains within it three distinct heating zones with a maximum temperature of 450°C，导致1000W的总加热能力。
The extruder itself weighs 18kg (which is light considering its purpose), and features a replaceable 24:1 length-to-diameter ratio extruder screw. The combination of the heat zones and the long screw serves to ensure the pellets in the extruder achieve a full melt, are pressurized, and are deposited in a consistent and uniform manner. Included in the box is a set of four nozzles, each of which are compatible with a wide variety of thermoplastics, including PLA, ABS, HIPS, PETG, and more that are currently being tested.
Earlier this month, at Formnext Connect,3D打印机制造商和服务提供商Titan Roboticsannounced the launch of its own large-format pellet extrusion 3D printing system,地图集3.6. Compatible with Titan’s Dual Pellet Extrusion and Hybrid Pellet + Filament Extrusion systems, the Atlas 3.6 features a build volume of 50″ x 50″ x 72″, and is one of the largest machines of its kind currently on the market.
Elsewhere, in the materials sector, Titan recently announced a collaboration withJabil Engineered Materials，一个制造专家Jabil的单位，以推动用于工业应用的大型3D打印的功能。具体来说，合作伙伴将努力qualify Jabil’s polymer materials在Titan的基于颗粒的3D打印机上，并且已经验证了该公司新发布的碳纤维增强尼龙复合材料颗粒。
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Featured image shows Massive Dimension’s printing cell, which is still in development. Image via Massive Dimension.
