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In this composites training video, we demonstrate how low-melting point metal alloys can be used as sacrificial cores/mandrels when manufacturing hollow composite structures.
The process can be used to produce complex hollow structures, such as tubes or frame components by laminating prepreg carbon fibre around a cast metal mandrel, which is then cured at elevated temperature before the temperature is increased further to melt-out the metal core, leaving the hollow composite structure.
For full details on the products used, as well as a step-by-step breakdown of the process, see the project page on the Easy Composites website:
Full Project Details
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00:00 Introduction
02:23 Making The Pattern
03:05 Setting up Barriers for the Silicone Mould
06:03 Pouring the Silicone Moulds
07:52 Casting the Low-Melt Metal Mandrels
13:37 Laminating the Components
16:52 Curing the Prepreg
19:04 Melting Out the Metal Mandrel/Core
20:15 Finishing Work
