July 2024
Intermediate to advanced
280 pages
12h 52m
English
Content preview from The Essential Handbook of Polymer Terms and Attributes
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77 Injection Molding
Injection molding is a method to obtain molded products by injecting plastic materials melted by heat into a mold and then cooling and solidifying them.
The first injection molding machine was patented in 1872 by two brothers, John and Isaiah Hyatt. In 1939, Arthur Eichengrün, who invented the first soluble forms of cellulose acetate with Theodore Becker, patented the injection molding of plasticized cellulose acetate. By 1946, American inventor James Watson Hendry built the world’s first extrusion screw injection machine, which allowed much more precise control over the speed of injection and the quality of articles produced. Hendry’s work is a milestone of the modern plastic injection molding ...
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