page_title: Transfer molding
section_title: Resin transfer molding
hierarchical_section_title: Transfer molding / Variations / Resin transfer molding
caption_attribution_description: Visualization from the RTM (Resin Transfer Molding) process. December 2006 Laurens van Lieshout.
context_page_description: Transfer molding is a manufacturing process in which casting material is forced into a mold. Transfer molding is different from compression molding in that the mold is enclosed [Hayward] rather than open to the fill plunger resulting in higher dimensional tolerances and less environmental impact. Compared to injection molding, transfer molding uses higher pressures to uniformly fill the mold cavity. This allows thicker reinforcing fiber matrices to be more completely saturated by resin. Furthermore, unlike injection molding the transfer mold casting material may start the process as a solid. This can reduce equipment costs and time dependency. The transfer process may have a slower fill rate than an equivalent injection molding processes.
context_section_description: Resin transfer molding (RTM) uses a liquid thermoset resin to saturate a fiber preform placed in a closed mold. The process is versatile and can fabricate products with embedded objects such as foam cores or other components in addition to the fiber preform.
caption: Figure 2: Resin Transfer Molding 1: Cope 2: Drag 3: Clamp 4: Mixing chamber 5: Fiber preform 6: Heated mold 7: Resin 8: Curative
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