Joint project live at Fakuma 2023
Overmolding of sensitive electronic components with thermosets
At the Plasmatreat booth 1210 in hall A1, a joint project will demonstrate the pretreatment and overmolding of printed circuit boards using injection molding.
First, the PCB will be cleaned with Openair-Plasma® and contamination like dust or grease will be removed in the best way. The next step is plasma technology again: the electronics components are then coated with an adhesion-promoting layer using the special PlasmaPlus® process and finally overmolded with a temperature-resistant thermoset in an injection molding system. The Openair-Plasma® treatment and PlasmaPlus® coating ensure reliable adhesion of the plastic to the circuit boards and protect them from environmental influences.
The process
Plasma treatment and injection molding process are in the focus of this exciting joint project, which Plasmatreat will present with various partners. Among others, ARBURG GmbH, Siegfried Hofmann GmbH, Sumitomo Bakelite Co., Ltd., and Barth Mechanik GmbH will be present. These companies will demonstrate the encapsulation of printed circuit boards (PCBs) with plastic at the Plasmatreat booth.
The fully automated process starts with a gentle fine cleaning of the electronic components with Openair-Plasma®. The PCBs are then coated with an adhesion-promoting PT-Bond layer using the PlasmaPlus® process from Plasmatreat. With the aid of a gripper from Barth Mechanik, the pre-treated PCBs are then inserted into the injection mould from Hofmann in the Allrounder 470 A injection moulding machine from ARBURG. In the system, the components are overmolded with a 1K epoxy-based thermoset from Sumitomo Bakelite. This process is supported by the company Kistler Instrumente AG, which is active in the field of sensor technology. Kistler provides a pressure sensor that measures the pressure in the mold to ensure the right amount of material is used. Also part of the joint project is Sigmasoft Engineering GmbH, which uses its simulation software to check whether the plastic is flowing into the mold as planned.
We would like to thank our partners for their support in this big project!
If you are interested in experiencing our joint project live, please visit us at Fakuma 2023 at booth 1210 in hall A1.
