Micro CIM Parts Predestined for Medical Device Technology

A piston press is used instead of the usual worm shaft. This piston is so small that it can transport very small amounts of material. It is important to monitor the process, which would not be possible with micro-injection moulding on a normal injection moulding machine. The resolution is too coarse to measure injection pressures, injection volumes, etc. However, monitored processes are the be-all and end-all in many industries and a key requirement for suppliers. With the small injection unit, it is possible to resize the minimal piston movements and thus measure and monitor these small quantities. This is how Sembach/DE ensures process reliability for the micro-parts.

Parts that are manufactured using the micro-injection moulding process are in demand, for example in medical device technology. The manufacture of medical components, in particular, is subject to sensitive requirements, especially when it comes to components on medical devices that are in direct contact with body tissue. Here, the special suitability of ceramic material (usually oxide and non-oxide ceramic), which is particularly biocompatible, corrosion-resistant and wear-resistant comes into its own. Some typical micro-parts made using micro-injection moulding are miniature bushings for pacemakers, tips for endoscopes for minimally invasive procedures or tools for miniature components.
With the strict certification according to IATF 16949, which Sembach has, the company is also ideally positioned for medical devices and tools. Sembach, for example, has manufactured the miniature bushings for pacemakers mentioned above. The volume of this part is 13,9 mm3 and the weight 0,055 g. The quality control following the manufacturing process of the micro-parts can be carried out automatically at Sembach, depending on the quantity, using a visual microscope inspection or, for high volumes, as an optical 100 % inspection using camera systems.


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