Thermoplastic CFRP (CFRTP) can be welded to injection moulded parts by applying temperature. However, how much strength can be expected when welding is carried out in the actual process? We have carried out strength verification using injection moulds.
CFRTP injection welding samples (PA6:PA6)
Samples of thermoplastic CFRTP (PA6) laminate pressings and boss holes & ribs welded by injection moulding were used for the tests.
Test result
Injection welding was apparently welded, but it was difficult to secure the melting area and sufficient welding strength could not be achieved.In addition, the post-moulding shrinkage of the plastic moulded products sometimes caused them to peel off without any action.
From this it follows that.
... when carrying out injection welding, CFRTP must also be sufficiently heated.
This can be said to be the case.
However, heating CFRTP to a weldable area requires a revised temperature controller, which increases equipment costs. In addition, the generation of voids inside the CFRTP due to heating cannot be ignored.
In other words, to weld bosses and ribs to CFRTP, it is necessary to
... it is necessary to locally and instantaneously raise the temperature of the resin to the welding temperature.
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