Autor: Norbert Babel

Spare parts for older products are often difficult to obtain or cannot be produced in an economically viable way using conventional manufacturing techniques. This article examines whether damping elements for gearbox bearings (in/for the automotive sector) can be manufactured from thermoplastic polyurethanes (TPU) with the same or compatible properties as the original part alternatively using additive manufacturing.

Finger fractures are usually still casted with plaster bandages. However, to avoid acampsia of the finger joints, flexibility exercises are necessary. Further disadvantages of the rigid plaster bandages are insufficient breathability and water resistance, weightiness and the necessity to apply wet and pliable plaster bandages to the injured patient. This article describes how individually designed hand orthoses without these disadvantages are attainable. With scans, modern software like STL editors (STL: Standard Tessellation Language) or CAD systems (CAD: Computer Aided Design) and additive manufacturing, complex, light weight and breathable structures are possible. Contrary to the solely mechanical art of casting with plaster, the new approach requires expertise in data processing and additive manufacturing seldom found in medical facilities. But this opens opportunities for service providers.

The use of industrial robots in additive manufacturing has been increasing in recent years. Particularly due to the voluminous installation space and the great flexibility, they are predestined for the production of large-volume, individualised components. The multi-axis movement options of the print head attached to the end effector in conjunction with a swivel-tilt unit of the build platform mean that support structures can be dispensed with, which represents a major economic advantage.

Abrasive blasting is often used to clean work pieces. During the process an abrasive medium is propelled with compressed air toward a given surface. Common abrasives are sand, glass beads, steel or corundum. For safety reasons the blasting process is carried out in closed blast cabinets or rooms. Abrasives and cut off material are filling the air so that the visibility is limited. Quality assurance and safety monitoring of workers in blast rooms are therefore difficult which is essential e. g. in atomic power plant demolition. This article describes the development and test of a camera to improve this situation. Compressed air flows through the camera housing to keep particles away from the lens. The air flow was optimized by computational fluid dynamics. A prototype was made by 3D printing and tested in an blast cabinet.

Interior such as armrests consist of different materials. The materials and manufacturing processes are limited regarding custom-made cushioning and geometry. Air conditioning and illumination through the layers is difficult. With 3D printing a shell can be combined with a flexible supporting structure providing comfort and conduits for air or wires. This article discusses a printed removable armrest with integrated air conditioning and illumination.

As the Ernst & Young (EY) Global Printing Report 2019 shows, the use of additive manufacturing has skyrocketed from 24 % in 2016 to 65 % in 2019 within the past three years. Furthermore, around every second company wants to produce end products generatively in the next three years. In order to achieve this, more and more companies are considering how they can use additive manufacturing processes not only for prototypes, but also for contract manufacturing through to mass production of series parts.