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TECHNOLOGY | MEDICAL


Potential applications include the individualisation of medication. A Freeformer could be used to produce individual medications that could be optimised in terms of dosage and type of release of the active substance, or even of combinations of active substances, to meet the requirements of patients and therapy.” He said: “It is possible, for example, to


Above: The electric Allrounder 520 A has a


clamping unit in stainless steel finish for GMP compli- ance. In a cycle time of around 4.5 s, the production cell produces 64 pipette tips


market. “The hybrid and electric Allrounders, which are also available in a packaging version, are designed for efficient and high-quality series production and are predestined for mass produc- tion applications in the personal care, medical and pharmaceutical industries, producing items such as pipette tips, syringe barrels and closures,” says Sven Kitzlinger, medical expert from Arburg’s application engineering consulting team. “They offer short cycle times, reproducibility and reduced energy requirements, as well as process stability and a long service life. They also boast better emission ratings than hydraulic machines. In addition to the increasing automation of produc- tion processes, the use of high-speed, high-perfor- mance machines for pharmaceutical packaging is another key area. There are increasing synergies with the packaging sector, where Arburg also has a high level of expertise.” He said: “Of course, the ongoing evolution in


Right:


Samaplast, a Swiss manufac- turer of


medical and technical products, uses a Freeformer 200-3X to produce small batches or single-unit batches


the materials sector, with increasingly specialised materials, is also opening up new areas of applica- tion. At the same time, products are becoming increasingly complex, which requires new mould solutions such as cube-mould technology. One example of this is assemblies that are injection- moulded in a single cycle using sophisticated mould technology, thus simplifying downstream assembly.” Arburg adds that the trend towards more individual therapies increasingly requires produc- tion of small-volume batches, down to one-piece flow. “For the implementation of such tasks, Arburg has the Freeformer in its portfolio, an industrial system for additive manufacturing,” adds Lukas Pawelczyk, Head of Sales Freeformer. “Freeformers process qualified standard materials, enabling the use of a wide range of original materials as well as material and colour combinations. This includes medical grade thermoplastic elastomers or resorbable polylactide (medical PLA). The parts are of high quality and stability. Droplet size and process control can be specifically influenced, resulting in individual customisation options.


58 INJECTION WORLD | September 2019


process medical PLLA (Purasorb PL18) to produce facial and cranial implants, or TPE (Medalist MD 12130H) to make individually adapted ventilation masks. Another interesting option is the possibility of combining injection moulding and additive manufacturing to customise mass-produced parts in single-unit batches.” In the field of injection moulding, LSR process- ing gains in importance. “The micro injection module for LSR processing combines a pressurised cartridge with prepared material, an LSR cylinder module and an 8mm screw,” says Sven Kitzlinger. “The special LSR conveyor screw operates with a disc-type non-return valve based on the screw/ piston principle. This permits minimal shot weights to be achieved with great precision and the required travel distances. The pressure at the transfer point between the cartridge and the injection screw is recorded. Homogeneously prepared, newly dosed silicone is therefore available for each shot, which means that the processing quality is accordingly high.” Digitalisation of the entire medical technology sector is another important dimension. The Arburg host computer system (ALS) offers availability, traceability and the monitoring of validated process windows for product and process reliability. As a central component of digital production, ALS can provide comprehensive digital answers to any questions arising in this context. Due to the requirements of unique device identification (UDI),


www.injectionworld.com


PHOTO: ARBURG


PHOTO: HEIDEGGER FOTOGRAFIE 6900 BREGENZ/AUSTRIA


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