State of the Art: Carbon Fiber 3D Printing, Part Six

One topic we’ve skirted around in our carbon fiber series so far is large-scale composite printing processes. The reason for this is because it is both a big topic, literally and figuratively and involves material mixes that don’t quite fit with the continuous carbon fiber reinforcements we’ve discussed so far.

The BAAM 3D printer. Image courtesy of ORNL.

Oak Ridge National Laboratory (ORNL) is a pioneer in this space because the U.S. Department of Energy Lab almost single-handedly developed the technology, though it did so with the help of public tax dollars and partnerships with companies in the industry. Working with machine manufacturer Cincinnati Incorporated and Local Motors, ORNL developed the first large-scale plastic pellet 3D printer.

The project team used an old experiment additive construction that consisted of a large gantry system meant for extruding concrete. The printer was retrofitted with a screw extruder to process pellets made up of ABS with roughly five percent chopped carbon fiber filler. Using pellets has the advantage of much faster material handling, as well as reduced cost, since these are the same materials made for injection molding. Since injection molding pellets are available in wide supply and don’t need to be further processed into filament, the price is significantly lower.

The result was the Big Area Additive Manufacturing-CI system. The original BAAM-CI system was capable of printing 40 pounds of material per hour in a build volume of 7 ft x 13 ft x 3 ft. To demonstrate the sheer power of the machine, ORNL and its partners have 3D printed the chassis for a number of vehicles, including cars, boats and excavator cabs.

This Shelby Cobra is 3D-printed. Image courtesy of ORNL.

Since the first BAAM-CI printer was used to create a replica Shelby Cobra, its capabilities have grown greatly. Cincinnati Inc. now offers four sizes ranging from 11.7 ft x 5.4 ft x 3 ft to 20 ft x 7.5 ft x 6 ft, with a feed rate that has doubled to 80 lbs/hr. Cincinnati Inc. now offers a wider portfolio of 3D printers, including a Medium Area Additive Manufacturing system with a 1m x 1m x 1m build volume and 1 kg/hr deposition rate, as well as desktop-sized Small Area Additive Manufacturing printers.

The ability to handle composites with higher carbon fiber content has been achieved, as well. When 3D printing the first vehicle chassis for Local Motors, a 15 percent carbon fiber fill was used. In some cases, up to 50 percent carbon fiber content has been printed. Cincinnati states that “dozens of materials” have been used on its BAAM machines, such as ABS, PPS, PC, PLA, and PEI. In addition to carbon fiber, glass fiber and organic fiber have been used for reinforcement.

Taking a cue from its competitor, CNC manufacturer Thermwood developed its own large-scale additive extrusion technology, the Large Scale Additive Manufacturing (LSAM) series. Available with either a fixed or moving print table, the dual-gantry LSAM series is available with a print volume of 10 ft x 20 ft x 10 ft or 10 ft x 40 ft x 10 ft and can deposit 500 pounds of material per hour. And, while projects made by the BAAM printer require post-processing via CNC milling, the LSAM series has built-in machining capabilities that bring near-net-shape blanks to their final form.

Ingersoll’s MasterPrint was used to 3D print this boat. Image courtesy of Ingersoll.

To beat out everyone else in the manufacturing equipment space, Ingersoll Machine Tools worked with ORNL to develop the MasterPrint 3D printer, capable of 3D printing objects as large as 100 feet long, 20 feet wide and 10 feet tall at rates of 150 lbs/h to 1000 lbs/h. The system also features a CNC tool for machining parts to completion. We should note here that Thermwood claims its LSAM platform can be extended to be 100 feet long, though we have not yet seen such a setup.

Ingersoll sold its first MasterPrint system to the University of Maine, which it used to 3D print a 25-foot, 5,000-pound boat in under 72 hours. The ship, which will be used in a simulation program, had the distinction of achieving a Guinness World Record for the world’s largest solid 3D-printed item and largest 3D-printed boat.

The goal of the printer for Ingersoll is to fabricate massive tools for the aerospace industry. Upon the unveiling of the massive ship, CEO Chip Storie said, “The reality is we went into this technology targeting aerospace and you can print a large aerospace tool in a matter of hours or days where if you go the traditional route, it can take nine or 10 months to be able to build a tool. The cost difference for traditional tooling can run upwards of a million dollars to build an aerospace tool, where you can print a tool using our technology for tens of thousands of dollars. So, there’s a huge cost benefit. There’s a huge time benefit for the aerospace industry.”

The composites being used by these companies may only feature chopped reinforcement materials, but the speed and scale at which they can print is certainly impressive. In the case of Ingersoll, the company is working on incorporating hybrid modules that include fiber placement, tape laying, inspection and trimming.

We may see such systems as these become commonplace in certain manufacturing environments, particularly if continuous reinforcement can be integrated into the process. To learn more about the future of carbon fiber 3D printing, we’ll be looking at research endeavors in this field in our next section in the series.

The post State of the Art: Carbon Fiber 3D Printing, Part Six appeared first on 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing.

ORNL and UMaine team up to produce new nanocellulose-based 3D printing feedstock

Oak Ridge National Laboratory (ORNL), Tennessee, and the University of Maine (UMaine) have been granted $20 million in U.S. federal funding to create bio-based 3D material for large-scale additive manufacturing. In the past three years alone, Maine has witnessed the closure of several paper mills, including a Madison Paper Industries facility which closed down in May 2016 […]

Interview With Greg Haye of Local Motors About Co-Creation and 3D Printing

Local Motors burst onto the scene in 2007 using crowdsourcing and cooperative design to develop cars. Their visionary and bold approach lead them to become a nexus for designers, engineers, and gearheads who wish to work together on making vehicles. The Local Motors team has made the Strati, Olli, and Swim, which all use 3D printing heavily in their designs. Local Motors has been trying to usher in a paradigm of collaborative engineering and local production in a very complicated class of product with lots of safety and regulatory issues. It is not often that you find a company that wants to juggle and ride a unicycle at the same time. What’s more Local Motors has been using several 3D printing technologies to make some of the largest functional parts now being used. Local Motors is a very inspiring company for many of us and we decided to interview Greg Haye, their Vice President of Product Management, to find out more.

What is Local Motors?

Local Motors is actually one of two subsidiaries under the parent company, LM Industries. LM Industries is noted as the first digital vehicle manufacturer. A digital vehicle manufacturer means that we can build large, complex cyber-mechanical products from concept to deployment in under a year on our digital thread. This speed lets us bring products to market in a whole new way, designing with a global community of experts, and applying technology such as 3D printing to create and assemble products in small batches at our agile microfactories. We fulfill every step of the creation process from design to production in-house, the result being more stakeholder centric products, built at a lower costs, using fewer resources and taking less production time.

We start with “co-creation,” where we source design ideas using challenges on Launch Forth, our global community of designers and engineers. Once a winning design has been well received by users as a minimum viable product (MVP) it moves immediately into manufacturing, using one of our microfactories powered by robotic, additive and subtractive manufacturing capabilities, which often includes using the world’s largest 3D printer, the Thermwood Large Scale Additive Manufacturing (LSAM) for production. From this process, we’ve made the world’s first co-created car, the Rally Fighter; the world’s first 3D-printed car, Strati; and the world’s first co-created, self-driving, cognitive, electric shuttle, Olli. We also created our own subtractive process and composite materials for use in our vehicles.

Is 3D printing a natural fit for your business model?

The major revolution in direct digital manufacturing is that 3D printing is becoming a manufacturing tool rather than a modeling tool. It’s a huge shift in application fueled by changes in material, machine and processing science.

This shift towards using 3D printing as a manufacturing tool makes 3D printing a critical piece of our digital vehicle manufacturer model. 3D printing enables us to produce products that can quickly evolve to changing consumer demands or shifts in the product’s purpose.

How is 3D printing limited?

The current limitations are solely tied to the relative immaturity of the technology and materials ecosystem as compared to more conventional mass manufacturing processes. While we see ourselves as subject matter experts on the process and its entire ecosystem, we cannot do it alone and have enlisted the industries best partners to move the technology forward together in all areas. The largest limitations exist in the ability to accurately and easily simulate the 3D printed structures in existing CAD and simulations softwares. We have regularly developed our own simulation models to verify our designs performance and efficiency, but it is still a time consuming process.

What needs to change to make 3D printing a more viable production technology?

Advances in speed and efficiency in design processes and manufacturing equipment will accelerate its viability for mass commercial usage. This will be driven primarily by advancements in design and simulation software as well as faster, more accurate manufacturing equipment.

What materials are you excited about?

We are excited to work with more and more “green” materials coming into the market such as reclaimed carbon fiber from aerospace industry waste streams as well as bio based materials such as algae based polymers and bamboo fibers. Innovative solutions like these ensure that we can continue to push the bounds of energy efficiency and sustainability.

Do you think that your approach will be suited to a whole host of other products as well?

This is the beauty of the digital vehicle manufacturer business model. Our goal is to produce other products from design to production in-house. We as a company are currently working on mobility solutions, but we’re always exploring the depth and range of mobility products whether its off-roading vehicles, autonomous vehicles or a better wheelchair.

We recognize the massive opportunity to conceptualize, design, prototype and manufacture other products, especially in the realm of complex machinery or products that evolve rapidly due to shifting consumer demands.

Why would I help co-create your products? What the reward for me?

There are a few reasons. The first is the driving force behind many of Launch Forth’s 200,000 community members: following a passion. Launch Forth gives the hobbyist engineer, designer or critical thinker, the opportunity to create out a completely original idea to solve real world problems. It’s an opportunity for our community members to take their passion or side-hustle to the next level by testing their skills and potentially earn recognition for their work.

Another incentive for community members is the access to a community of thousands of like-minded people and the potential to bridge a critical skills gap. Many Launch Forth Challenge submissions are from groups or pairs of community members as Launch Forth creates an infrastructure and network for designers, engineers and innovators to connect and collaborate.

We also, of course, offer cash rewards and the potential to earn a commission for your designs or ideas (if the product is prototyped and produced by Local Motors or one of our industry partners like Airbus, Allianz or the US Marine Corps).

Why is Olli important?

Olli is our 8-person, low-speed, 3D-printed, autonomous, electric shuttle. It’s perfect for things like urban centers in cities, business campuses, hospitals or other large spaces where people need to get around.

This product exemplifies how LM Industries’ digital vehicle manufacturing is capable of creating real solutions for mobility challenges like sustainability and traffic congestion. Designed by a Launch Forth community member and now being manufactured and deployed across the country by Local Motors, Olli was designed and built specifically so that it could be constantly iterated on and easily customized to fit the needs of wherever it was being used. Also Olli was made from tire to roof with true autonomy and safety in mind, unlike other AVs, which are really minivans with mounted sensors and added software.

Is there actually an economic advantage to local microfactories?

Absolutely! Our vision for the local microfactories is for them to be as advantageous for the communities as possible. Ideally, the microfactories will employ the community, pushing the local economy forward, and only produce customized products that are really in-demand for the community’s needs.

For LM Industries, the local microfactories improve our digital vehicle manufacturing model because microfactories reduce the minimum efficient scale at which innovative products can be brought to market, by employing a workforce with a high mix of vehicle design, development and marketing capabilities. They are a distributed network of flexible production capacity designed around the low volume local products in production at any given time.

And more generally, microfactories are better for everyone ast they benefit the world as a more sustainable option. Microfactories are more sustainable as they theoretically reduce the environmental impacts of transport emission while they also promote less waste and higher recyclability. By producing more adaptable batches of product using more sustainable materials, and leveraging tech like 3D printing, our microfactories and our digital manufacturer model outpaces others in environmental benefits.

What other products are you working on?

We’re always working with multiple partners to figure out solutions to specific problems by developing new products through Launch Forth challenges. For example, Launch Forth recently completed the co-creation phase of the Island Electric Vehicle (EV) challenge, which called for designs to make a low-speed, rugged, electric vehicle particularly designed for island economies. A winning submission has also already be selected – Isla.

We also recently worked with the US Marine Corps to develop a modular logistics vehicle. This challenge, the first of many, asked for design submissions for a modular logistics vehicles that serve a multitude of operations as well as an unmanned cargo delivery system to improve the operations and well-being of servicemen and women.

What it Launch Forth?

As one of the imperative LM Industries’ subsidiaries, Launch Forth is a SaaS (software as a service) platform for product design powered by a robust community of designers, engineers and solvers. Launch Forth harnesses the speed and potential of crowdsourcing and co-creation to bring breakthrough products to market quickly with a shared community of over 200,000 innovators from around the globe who collaborate on ideas, solve problems and create solutions for challenges both large and small. This community-powered platform pairs design thinking with open innovation and accelerates the product development process for well-respected global giants like HP Inc., Local Motors, General Electric Co. and Airbus.

Local Motors wants to collectively design cars whose bodies are printed out locally.

Can I buy a Strati?

The Strati, the world’s first 3D-printed car is not available for commercial sales at this time.

For additional context, the Strati was the winning design entry among more than 200 received from 30+ countries around the globe during a six-week challenge led by Local Motors in Spring 2014. Designed by the company’s global community and built using the available technology at the Manufacturing Demonstration Facility (MDF) at Oak Ridge National Laboratory (ORNL), Local Motors will produce the Strati, designed specially for urban transportation needs of Chicago.

What do you think the potential is for Large Scale Polymer Composite Additive Manufacturing?

This process is unique in that we can use recyclable materials that can be deposited at a very rapid rate consuming low amounts of energy to build items of size and mass. This has huge potential in manufacturing items of scale such as vehicles, aircraft, ships, architectural building components, and tooling or molds. Most of these things take massive capital, resources, and time to execute. With Large scale additive processes applied this can drastically reduce the cost and foot print needed to manufacture.

Will open innovation outpace internalized innovation?

We view co-creation as the future. It will likely start being utilized by more companies in conjunction with their internalized innovation efforts because the internet gives everyone the basic infrastructure to access and connect with open innovation participants. While open innovation is not the solution for every problem, there is a massive opportunity to develop solutions to pressing problems through mass innovation and idea sourcing.

Why should I as a company partake in open innovation?

Open innovation forces a company to step out of its organization biases since the community of co-creators provide fresh ideas, built out of a diversity of perspectives. New ideas and even reevaluating on how to think about a challenge is invaluable to innovation.

What is holding companies back from co-creation?

For some companies, their infrastructure could be the barrier to utilizing co-creation. Co-creation requires the internal organization to establish a platform to curate, facilitate and sift the ideas coming out of a co-creation community. Also co-creation can be a seemingly intimidating process because a company has to develop a community and the infrastructure to handle the influx of innovation. It’s not easy, but it is mangable and can be an incredibly lucrative opportunity for businesses looking to find a solution.

World’s largest composite 3D printer installed by Thermwood at Local Motors to make self-driving vehicles

A Thermwood LSAM 10’x40′ 3D printer was recently installed at ground mobility company Local Motors. Large Scale Additive Manufacturing The Phoenix, Arizona headquartered Local Motors recently restructured under LM Industries and announced a Chandler, AZ microfactory focused on the low-volume production of specialist vehicles. LM Industries is also working with the U.S. Marine Corps to […]