Uploaded June 2023 | Updated September 2026, 1 week ago

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Buy now (USA) ►easycomposites.us/low-melt-alloys
Buy now (EU) ►https://www.easycomposites.eu/low-melt-alloys
Buy now (UK & World) ►easycomposites.co.uk/low-melt-alloys

Further information ▼

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
USA ►easycomposites.us/low-melt-alloys
EU ►https://www.easycomposites.eu/low-melt-alloys
UK & World ►easycomposites.co.uk/low-melt-alloys

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