Medical device component development

TPU has assisted a customer during optimisation of injection moulded polymer components for a needle-based injection system.

With a manufacturing volume in billions, every aspect matters and the attention to detail requires a systematic overview and deep understanding of all related aspects.

In this case the optimisation adresses:

• Mouldability with more uniform and reduced wall thickness

  • To obtain lower cycle time and higher part quality

• Friction reduction by:

  • Switching bearing surfaces from one part to the other leading to much less impact from friction during load on rim of upper part

  • Reducing bearing radius and width of contact area

  • Extending distance between the two bearing pairs leads to less sensitivity of uneven load on top of upper part (force at rim of part)