Technical Advances
The invention of a screw injection molding machine by American inventor James Watson Hendry in 1946 changed the world of cereal box prizes. Thermoplastics could be used to produce toys much more rapidly, and much more cheaply, because recycled plastic could be remolded using this process. In addition, injection molding for plastics required much less cool-down time for the toys, because the plastic is not completely melted before injected into the molds. Hendry also developed the first gas-assisted injection molding process in the 1970s, which permitted the production of complex, hollow prizes that cooled quickly. This greatly improved design flexibility as well as the strength and finish of manufactured parts while reducing production time, cost, weight and waste.
Read more about this topic: Cereal Box Prize, History
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