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Adhesives can be used, this can add a layer of security especially if you are worried about the inserts coming loose due to the thermal and vibrational loads you mentioned.

[Oliver Nicole]

hello! I’m working on a project that involves overmolding for a VC (valve cover) application. The goal is to embed connectors and screws directly into the molded part to streamline assembly and improve durability. I’m curious about the feasibility of this approach: does overmolding provide a secure enough bond to reliably hold metal inserts like connectors and screws under thermal cycling and vibration stresses typical for automotive applications?

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[Chris Maar]

Overmolding onto metal inserts is a common practice in injection molding. One method for achieving this is to design the inserts with overhangs, cavities, or a knurled surface that will allow the plastic to grip onto the metal inserts.

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[Oliver Nicole]

Can adhesives be used to bond the metal to plastic to create a fail-safe in case the inserts come loose?

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[Chris Maar]

Adhesives can be used, this can add a layer of security especially if you are worried about the inserts coming loose due to the thermal and vibrational loads you mentioned.

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[Bjorn]

Blasting wood can be more challenging than blasting steel because if you’re not careful you can easily blast away too much material. Wood also does not have consistent hardness properties throughout with knots typically being harder than the surrounding wood. Use a lower pressure, i.e. between 20 to 30 PSI, and keep the nozzle about 8 inches away from the material.

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