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Injection and Compression Molding: how to choose the ideal technology for EMI and thermal components

Precision molded EMI gaskets and thermal components created via injection and compression molding.
In the production of complex components for EMI shielding or thermal management, the choice of the transformation process is as decisive as the choice of the material. Molding does not only serve to shape but must preserve the integrity of the conductive particles or thermal fillers dispersed in the elastomer. Euro Technologies offers specific expertise in both injection and compression molding, guiding designers toward the most technically reliable solution.

Process versatility for advanced materials

Every project has unique requirements for volume, precision, and performance. Here are the technical criteria that guide the choice between the two technologies:
  • Injection Molding: It is the choice of excellence for complex geometries and high-volume production. The material is injected at high pressure into a closed mold, ensuring fast cycle times and millimetric repeatability. It is ideal for miniaturized components in sectors such as Biomedical and Telecommunications, where tolerances are extremely tight.

  • Compression Molding: This technique is preferable for larger components or those with high thickness. The material is positioned manually or mechanically into the mold cavity and then pressed. It is the ideal process when using elastomers with delicate conductive fillers (such as Nickel-Graphite or Silver-Copper), as it reduces mechanical stress on the material, preserving its shielding properties.
Whether it is a custom gasket with metal inserts or a shaped heat sink, our integrated approach ensures that form always follows technical function.
Thanks to a deep knowledge of Laird compounds, Euro Technologies supports the customer from the mold design phase, preventing critical issues such as air bubbles or particle misalignment that could compromise the EMI/RFI compliance of the finished part.

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