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Injection Molding

Mechanical Engineering

Injection molding forces molten plastic, metal or another material into a precision-machined mold cavity under pressure, holds it under pressure while it cools and solidifies, then ejects the finished part, producing complex, dimensionally consistent shapes at a volume and unit cost no hand process can match. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/

Facts
Core Principle
Melt the material, force it under pressure into a closed mold cavity, hold the pressure while it cools and solidifies, then eject the finished part and repeat. 1
Origin Year
1872 1
Connections

Associated With

Ceramics, Materials
Fiberglass, Materials
Nylon, Materials

Nylon is routinely shaped by injection molding into gears and housings.

PEEK, Materials

PEEK is a high-performance thermoplastic commonly processed by injection molding.

Plastics, Materials

Injection molding is the main mass-production process for thermoplastic parts.

Polycarbonate, Materials

Polycarbonate is routinely shaped by injection molding.

Polyethylene, Materials

Polyethylene is routinely shaped by injection molding.

Rubber, Materials
Zirconia, Materials

In Field

Sources
1. Injection Moulding (Wikipedia)
Wikipedia contributors, Wikimedia Foundation
  • History section
    John Wesley Hyatt and his brother Isaiah patented the first injection molding machine in 1872.
  • lead sentence
    Injection moulding (U.S. spelling: Injection molding) is a manufacturing process for producing parts by injecting molten material into a mould, or mold.
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