Shaping glass with a metal cage form - GIF

Shaping glass with a metal cage form.

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Previously:

Glass tube bending machine - GIF
Hot glass passing through roller - GIF
Molding glassware - GIF
Mouth-blown window glass manufacturing - video
Water droplet in hot glass powder - GIF

not seeing any hinges on the wire form - something I'm missing?

It's going to be a lamp...