TharwarFouad3D.jpgClick image to enlarge
by Mary Scianna

Ontario firm sets growth sites on additive manufacturing

When Tharwat Fouad decided to expand his manufacturing business in 2012, he investigated many options before finally setting his sites on additive manufacturing.

 

"We understood it was a new method of manufacturing and we could differentiate between the media buzz about how this technology would take over manufacturing, and the actual facts of the potential of it," says Fouad, who has an engineering degree. "3D printing began as a process for prototyping and I used it 20 years ago when I worked at Proctor and Gamble. The technology has evolved; today prototypes are produced faster and more accurately."

Of course the biggest change for additive manufacturing is the shift it is making into real-world manufacturing applications.

"3D printing with SLS [selective laser sintering] is similar to when CNC came out 50 years ago. CNC was a new method of manufacturing that saved time, was more accurate, and offered repeatability. Engineers learned how to design for CNC. 3D printing in SLS is the same thing; a new method for manufacturing parts. It has its advantages and its limitations. People in manufacturing need to learn how this technology works and how to master it; there is still a big gap of knowledge in industry. Once manufacturers master the technology, you will see it take a fair percentage of the market," says Fouad.

Laser sintering process in actionClick image to enlarge

Anubis 3D is a division of Anubis Manufacturing Consultants Corp., Mississauga, ON. The intent of the new additive manufacturing division, formed in 2012, was to provide additional manufacturing services to existing customers, but the division has opened the doors to new markets and new customers. Anubis 3D is focused on the plastics market short term, but Fouad says he is "not removing the possibility of going to metal" some time in the future.

Anubis purchased an additive manufacturing machine, the Formiga P100, from Machine Tool Systems, Toronto, a distributor for EOS of North America Inc., Novi, MI.

EOS machine for metal EOSINT M 280Click image to enlarge 

While there is much intrigue about the benefits 3D printing can bring to a manufacturing operation, there is also a steep learning curve. Indeed, Anubis is still in the midst of learning the intricacies and capabilities of the technology. "It took quite a bit of work to achieve repeatability for the products we were manufacturing and to be able to commit to customers what we could deliver," says Mona Louca, 3D deparment manager at Anubis. "There are many variables involved in getting the process right; you have the powder mix, recylce and storage conditions, party geometry features, etc. There are multiple parameters and you have to understand these parameters. You have to learn the technique of laying out parts to obtain a successful build. We tested parts by building them vertically and horizontally and analyzed the difference in terms of esthetics and part integrity. Right now we build parts at a layer thickness limit of 100 microns using selective laser sintering. Some of the other technologies have the capability of producing higher precision plastic parts with layer thicknesses between 50 and 60 microns, however the materials are brittle and are meant for show; they're not functional parts. The metal machines produce parts with layer thicknesses of 20 microns, depending on the material, which renders a surface roughness value (Ra) after shot peening of two to three microns."

"To get into this market, you have to focus on the best possible products that suit additive manufacturing. For us, it is small, complex parts and short production runs," says Fouad.

Anubis has had its EOS machine for one year now, but it has only been manufacturing products for customers for the past six months because the first few months were spent on testing the machine's capabilities and learning to better understand the technology.

One of the most recent products manufactured on the EOS machine were cell phone covers for the Apple iPhone. The customer designed the covers and Anubis manufactured them. The customer took the covers to a trade show in China in September, MAC WORLD, and won first prize in the product lifestyle category.

"He originally came to us to manufacture a prototype of his iPhone cover. He wanted to test the market and when he won the design, retailers came up to him and wanted the covers, so he came back to us with more orders. We've negotiated an order for 2000 parts to be shipped to China and have another order for 10,000 parts," says Fouad.

One of the advantages additive manufacturing brings to the manufacturing table is its design flexibility and the electronics market is a good example of how such flexibility comes into play. In September, Apple came out with two new models for its iPhone. "We may need to tweak the cover for the new phones and with additive manufacturing it's very quick to turn around a new design. Usually tweaks in a design may take an hour of work from a designer and once we have the new style in CAD format we can print the new design," explains Louca.

A mass flow meter for particulates that Anubis manufactured recently is another example that illustrates additive manufacturing's design flexiblity. Called the ARBOmeter, the product measures flow of materials in the mining, plastics, recycling and food processing industries. The plastics parts went through an extensive redesign and were revised more than 15 times, estimates Fouad. One of the designs included an innovative way to cool the enclosure of the device. Engineers created cooling channels, and added fins and baffles to maximize heat transfer.

"Being able to explore multiple iterations inexpensively was vital to this aspect of the project," says Fouad.

The meter's laser-sintered frames are built in batches of four nested sets, seven to a set, over about twenty hours, estimates Fouad. Each part is made of 100 micron layers, one on top of the other. Anubis has minimized the frames to optimize set sizes and plans to run five sets at once in the machine. It expects to make between 100 and 200 meters this year.

While Anubis currently has only one machine, Fouad estimates there is space for 40 to 50 additive manufacturing machines in his 11,000 sq ft facility.

"We're running almost every day now. We have customers asking for a variety of prototypes such as end of arm tooling and other customers investigating UAVs [Unmanned Aerial Vehicles]. We're focusing on industrial tools and accessories," says Fouad.

There is no doubt in Fouad's mind that additive manufacturing's role in traditional manufacturing will continue to grow, but unlike sentiments reflected in th "media buzz," the technology will not replace traditional manufacturing. Instead, Fouad envisions it enhancing manufacturers' capabilities.

He says the key to additive manufacturing does not lie in the machine; it's in the material. "There will be more development in the powder. Machines will become faster, but the big breakthrough will be in new materials and their capabilities for longer term durability," says Fouad. SMT

www.anubis3d.com

www.eos.info/en

www.machinetoolsystems.com

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