This doesn't exactly look like a food-safe facility, but I guess the laws are a little more relaxed in whatever country this was shot in. Here's a 12-mold ice cream cone making machine in action:
While wafer cones like those are molded, the production methods for waffle cones and sugar cones are a bit more involved:
Interestingly, Japanese ice cream manufacturer Nissei Co. employs a fellow named Tsutomu Owada whose sole job is to design molds for ice cream cones.
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Owada designed this fancy Laurel Top cone:
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"Laurel Top," a Nissei spokesperson soberly told The Asahi Shimbun, "satisfied the needs of people who wanted more gorgeous cones."