Aero-Plastics specializes in injection molding projects such as insert molding and other value-added services. We offer injection molding PEEK, Ultem and other high-performance engineered resins, plus commodity resins such as polypropylene, polyethylene, polystyrene, ABS, and nylons.
As veterans in high-performance polymers and engineered resins, you can rely on us to provide expert guidance on materials. All of our tooling is built to Class 103, 102, and 101 industry standards.
What is Injection Molding and How Does It Work?
Injection molding is a manufacturing method in which molten material — commonly a thermoplastic or polymer– is injected into a mold in order to produce a part.
A heated barrel mixes the desired material and injects it into a mold cavity. When it cools, it hardens to the shape of the cavity, creating the desired product. Molds are usually designed by an engineer or industrial designer, who then further refines the mold with precision machining.
Use cases for injection molding vary widely; it can be used to manufacture molds and parts from tiny components to large automotive parts.
Injection Molding Machines
Injection molding machines consist of two units: a clamping unit and an injection unit.
The clamping unit is used to open and close a die in the machine, and to eject the final product.
The two methods for the injection unit are a straight-hydraulic, in which a hydraulic cylinder opens and closes the mold, or a toggle.
Toggle clamping uses the injection unit to melt the material, then inject it into a mold. In a process called metering, a screw then rotates to gather melted material from the hopper, until enough is accumulated to begin the injection process. The machine controls the injection speed via the rotation of the screw.