With 2 component 3D printing igus offers design freedom

  • Industry News
  • Nov 30,20
The solution of two-component printing (2K) allows tribo-filaments to be combined with carbon fibre-reinforced filaments. This makes not only a low-wear component, but also one that is extremely resilient.
With 2 component 3D printing igus offers design freedom

Igus, Cologne-based motion plastics and polymer bearings specialist, has also produce components with various filaments making it useful for prototypes, spare parts, tools and small batches using 3D printers. Different material properties can be easily combined in this 2-component 3D printing. For example, 3D printing can be used to produce components that require both special rigidity and high wear resistance. This gives companies more freedom and flexibility in design.

3D printing has become a serious alternative to machining processes such as turning and milling in industry. 32 per cent of industrial companies already used the technology in 2019, twelve per cent more than in 2016, according to a study by the industry association BITKOM. And the demands of users are increasing. "In recent years, more and more designers have asked us whether it is possible to produce components from several plastics, using 3D printing, in order to achieve special properties," says Tom Krause, Head of Additive Manufacturing, igus. The solution is Two-component printing (2K). This allows tribo-filaments to be combined with carbon fibre-reinforced filaments. The customer not only receives a particularly low-wear component, but also one that is extremely resilient.

Two-component printing

There are hardly any restrictions from a geometric point of view to this system. "We have now expanded our 3D printing service to include two-component printers (2K), which can work with two different printing materials offering more flexibility in product development. The 2-component printers work with the FDM process. The two molten plastics each flow through a separate pressure nozzle. The 2-component printers can switch between materials at any time during printing, and they merge at the transitions,” says, Tom Krause clears.

"The materials can enclose themselves, intertwine and alternate in layers," he adds. An exceptional case only arises if the melting temperatures of the filaments differ greatly and no material fusion is possible. In this case, designers can create a form-fit connection such as a dovetail, which connects two areas made of different plastics.

The filament portfolio includes lubricants and high-performance polymers with fire-retardant, hygienic and antistatic properties, amongst others. Tom Krause, explains, "With 2-component printers, we have the possibility to combine the specifications of two filaments in one component."

One example of a 2-component printed part is a gripper element for a machine that screws on lids in the food industry. The body consists of an iglidur filament, which guarantees robustness and wear resistance. The surfaces, on the other hand, are made of a flexible material that provides slip resistance.

"With 2-component printing, the user benefits from a material mix," emphasises Tom Krause. "In the past, the individual parts could only be printed out and put together one after the other. Now it's much easier and faster."

igus GmbH is a global leading manufacturer of energy chain systems and polymer plain bearings. The Cologne-based family business has offices in 35 countries and employs 4,150 people around the world. In 2019, igus generated a turnover of 764 million euros from motion plastics, plastic components for moving applications. igus operates the largest test laboratories and factories in its sector to offer customers quick turnaround times on innovative products and solutions tailored to their needs.

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