This is the final part in our series of “Designing for 3D Printing” webinars. Just as we’ve looked at stereolithography and direct metal laser sintering in previous webinar, this presentation will provide insights into how to design for selective laser sintering (SLS), a discussion on material options, and recommended applications for SLS.
The presentation will include the following:
- Comparison of SLS materials
- Design guidelines for functional prototypes and production parts
- Moldability considerations for effective development
- Open Q&A session
TITLE: Designing for 3D Printing: Selective Laser Sintering
PRESENTER: Eric Van Roekel, SLS production manager
DATE: Thursday, October 27 at 1 p.m. CDT
REGISTER: Click here to sign up
Can’t make it that day? You can still register and we’ll send you an on-demand version to watch when convenient. Also, feel free to forward this invite to your colleagues.
University of Minnesota engineering students are readying a 3D-printed rocket engine for launch sometime later this year, with help from Proto Labs.
This cutaway view of the engine shows the cooling channel, which is one long tube that spirals down inside the wall.
David Deng, a senior aerospace engineering student at the U of M’s Twin Cities campus, is leading the extracurricular effort to design, build, and eventually fly a liquid-propellant rocket as project manager of LPRD Rocketry. The group’s name, pronounced “leopard,” is an acronym for Liquid Propellant Rocketry Design. The group includes aerospace engineering students and others studying electrical engineering, computer science, mechanical engineering, and materials science.
The primary design challenges the group faced included the small overall size of the engine itself, and the need to also somehow incorporate a cooling system inside the engine.
David Deng (right), and the University of Minnesota student group LPRD Rocketry (left).
“The manufacturing of [the rocket engine] is incredibly difficult using conventional methods, especially for a very small engine,” Deng said. “The struggle was how do we [add] a single cooling channel through this entire engine, coiling around the side of it? That’s where Proto Labs came in. 3D printing is essentially the only way to get regenerative cooling on an engine this small and have it be a single channel.”
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The latest innovation in tractors for the modern farm “features everything but the farmer,” muses a recent headline in a story from Bloomberg News about an autonomous tractor concept from CNH Industrial.
“As Detroit carmakers and Silicon Valley tech giants vie to bring driverless cars to U.S. roads, one of the world’s largest tractor makers is looking to do the same down on the farm,” Bloomberg reports.
This self-driving tractor, a Case IH Magnum prototype model from CNH Industrial, was revealed for the first time last month at a farm equipment show in Iowa.
Photo: Wall Street Journal
At a farm equipment show in Iowa in September, CNH Industrial (Case IH/New Holland) revealed its Autonomous Concept Vehicle, which drew strong interest from those in attendance.
The cabless, self-driving tractor—a Case IH Magnum prototype model—is equipped with cameras, radar, and GPS, enabling farmers to remotely monitor planting and harvesting via computer or tablet from their homes, barns, fields, or pickup trucks. A second concept model, the New Holland T8 NH, includes a cab, so that the tractor can be operated either by a driver or in autonomous mode.
The drone market in the U.S. is expected to soar to an $82-billion industry in the next decade, the New York Times recently reported. With that robust market in mind, Lockheed Martin, the aerospace, defense, and technology giant, developed a small, fold-up, lightweight drone, the Indago Quadcopter UAV (unmanned aerial vehicle), turning to Proto Labs for quick-turn prototyping and low-volume production.
Proto Labs’ automated design for manufacturability (DFM) and quoting system was especially helpful in taking the Indago from 3D-printed prototypes to injection-molded parts, and getting finished parts delivered in days and weeks. The video tells the story:
Injection molding is a common, cost-effective method for manufacturing parts, but, sometimes, those parts need a little help. Low impact or vibration resistance, slippery surfaces, poor ergonomics, and cosmetic concerns are only a few of the reasons why a second molded part is often added as a grip, handle, cover, or sleeve.
Proto Labs now offers rapid overmolding for parts, including the three samples pictured here.
The process of rapid overmolding will get the job done. This method, which Proto Labs now offers, and is the focus of our October design tip, uses a mechanical or chemical bond (or both) to permanently marry two parts together.
This month’s tip discusses:
- Bonding: A strong bond between the two materials is critical to overmolding.
- Materials: This is a key consideration in overmolding.
- Principles: Overmolding uses the same playbook as injection molding, but with a few quirks.
READ FULL DESIGN TIP