Compression Molding is a very common process, unlike Rotomolding. Examples of compression molded parts are o-rings, gaskets, seals, or hose fittings.
The main advantage for Compression Molding is that you can use massively different wall thicknesses. For injection molding, which is the baseline we look at, you typically want a 2 millimeter wall. With compression molding, you can have an inch down to basically nothing and the process will adapt to that.
You can view the full lecture and slides below.
Video by Williamson Visuals