This is how most of the world’s plastic products are made, from car body panels to bottle lids. It is also used for glass and metals. The material is heated and forced into a cavity mould made of metal, where it cools and hardens. The moulds can be reused thousands of times which makes it ideal for mass production. The picture is showing one side of a comb mould.
Image source: https://sc02.alicdn.com/kf/HTB14sGpJXXXXXX0XFXXq6xXFXXXh/China-Factory-Plastic-Comb-Making-Injection-Mold.jpg
Process: injection moulding
Ball Chair by Eero Aarnio
This chair could be made in many ways but I found the fabrication process explained by Eero himself:
“/…/ I made the first prototype myself using an inside mould, which has been made using the same principle as a glider fuselage or wing. I covered the plywood body mould with wet paper and laminated the surface with fiberglass, rubbed down the outside, removed the mould from inside /…/”
If the rammed earth is the timeless, plastic is the future. Atleast the future from the past. A strong, durable and lightweight material. I don’t know if it is the aestetics associated with the material or the material itself that interest me, but it is interesting.
Picture is from the Movie “Moon Zero Two”, taken from: http://chairblog.eu/wp-content/uploads/Ball-Chair-in-Moon-Zero-Two.jpg