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3D-printed robotic grippers make packaging machines efficient

By Lisa Eitel | October 2, 2018

Plastic grippers from a 3D printer and made with tribo-filaments from igus are 85% cheaper and 70% faster than most competitors currently being used in the packaging industry.

3D printing, one of the most impactful trends emerging in modern industry, allows for the single batches to become a reality and enabled for the personalized serial production of furniture, shoes, and watches, for example. The packaging industry can also benefit from additive manufacturing.

Metal grippers can be costly with long leadtimes. So Carecos Kosmetic (after trying to 3D print grippers with standard plastics such as ABS and PLA with lackluster results) turned to igus. Now the company uses iglide I150 components and has a lubrication-free and maintenance-free tribo-filament gripper design optimized for low friction and minimal wear.

Since 2015, igus has been offering tribologically optimized 3D printing filaments for the Fused Deposition Modeling (FDM) process, specifically for the printing of wearing parts. The filaments are made from self-lubricating iglide high-performance plastics and are optimized for wear and friction. Many companies have already had success using the igus tribo-filaments.

Germany cosmetics company solves packaging issue

Carecos Kosmetic GmbH faced an issue with its packaging process, and solved it with 3D plastic grippers.

If a product had to be changed, the company had to have new grippers made for the packaging machines, which would grip the lids and screw them on to products. The company had previously used an elaborate aluminum gripper that cost more than $11,500 per part, and needed six weeks to execute a changeover. In an industrial sector that is becoming increasingly nimble, it its essential for manufacturers to transition far more rapidly and economically produce small batches.

Carecos Kosmetic, the Germany-based manufacturer of high-quality cosmetic products, turned to the the tribologically-optimized iglide I150 filament, and discovered a stable, impact-resistant aterial for 3D printing. The company found that it could use a gripper that can be printed within 10 to 12 hours.

Here’s a typical production line in a pharmaceutical company. With the iglide I150 tribo-filament, lubrication-free and maintenance-free components can be printed, among other things for the safe movement in the food and beverage industry. Source: igus GmbH

Lubrication and maintenance-free robot components minimize friction and wear

Due to the high costs and the long production time of the metal grippers, Carecos Kosmetic initially tried 3D print grippers with standard plastics such as ABS and PLA. However, the printing processes did not provide satisfactory results.

The company turned to igus and iglide I150, and now has a lubrication-free and maintenance-free tribo-filament optimized for friction and wear.

Almost every element of a gripper is flexible and glides on shafts and pins, so that the individual parts are exposed to constant wear. Metallic parts must often be fitted with separate bearings or lubricated in the application.

The use of iglide I150 in 3D printing enabled the company to save up to 85% of the cost and 70% of the manufacturing time compared to the previously selected aluminium formats. The printed plastic grippers are also seven times lighter than metal grippers.

Besides its ease of processing, the special feature of iglide I150 is its food contact compliance with EU Regulation 10/2011. With this certification, customers can also use the versatile tribo-filament to print special parts for moving applications that are in direct contact with food, beverages or even cosmetics.

In addition to iglide I150, igus offers five additional filaments for the printing of wearing parts in a wide variety of application scenarios. Compared to standard materials such as polylactide (PLA), the high-performance plastics from igus are up to 50 times more wear-resistant and can be processed on all standard 3D printers.

Printing service expands material range

Companies that don’t have 3D printers can have their individual wear-resistant parts printed directly at igus using the FDM process or selective laser sintering (SLS). For these cases, igus offers a 3D printing service.

Tribo-filaments can be obtained as a filament material, or alternatively as an already finished, ready-to-install printed component from the igus 3D printing service. The appropriate data is transferred online into the browser window in STEP format via drag and drop. Next, the needed quantities are specified, and a suitable material selected.

Depending on the request, a formal offer is made, or an order is placed immediately. In the SLS printing process, igus can also produce complex special parts very quickly and even make components with a height of up to 300 millimeters, which could only be produced in mechanical or casting technology with much more elaborate processing and using expensive special tools. Even today, small batches of up to 500 units are being produced from the company’s own laser sintering material iglide I3 and the SLS material for gears iglide I6 within a very short time.

For more information — and to submit STP files for print — visit igus.com/info/3d-print-motion-plastics-printed.

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About The Author

Lisa Eitel

Lisa Eitel has a B.S. in Mechanical Engineering and 17 years of experience as a technical writer. Her areas of focus include motors, drives, motion control, power transmission, robotics, linear motion, and sensing and feedback technologies.

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