Compression molding is a traditional, high-pressure formative manufacturing process used primarily for converting thermosetting polymers, elastomers (rubbers), and fiber-reinforced composite
Compression molding is a traditional, high-pressure formative manufacturing process used primarily for converting thermosetting polymers, elastomers (rubbers), and fiber-reinforced composite structures into structural components. The fundamental physical mechanism relies on compressing a plastic charge inside a heated, closed cavity.
The physical cycle consists of five sequential steps:
Molding machines for compression and transfer processing are vertical hydraulic presses built either as C-frame presses or as heavy-duty four-column portal structures. The kinematics of the press involve linear motion along a single vertical axis (Z-axis), driven by a hydraulic pack integrated with proportional valves for velocity and force control.
Key mechanical subsystems include:
Compression and transfer tooling (molds) are engineered from high-durability alloy tool steels (such as H13, P20, or 1.2343), which are vacuum hardened and hard-chrome plated to resist the high abrasive action of glass fibers and the corrosive chemical gases evolved during thermoset curing.
| Category | Formative Manufacturing |
|---|---|
| Library | CNC machining |
Engineer, author of The Big Book of 3D Printing and additive manufacturing expert