Transfer Molding – Low Cost Alternative to Injection Molding

transfer molding


Transfer molding is often an excellent, and cost-effective, choice for intricate rubber parts. We provide a full-service approach to transfer molding: we create your mold (or use your supplied mold), come up with the proper formulation to meet your specifications, mix the rubber, preform it and make your product.

The Transfer Molding Process

Transfer molding is a type of compression molding that also has properties of injection molding. In this process, a rubber sheet is inserted into a heated pot that is located directly over molding cavities and connected to these cavities via sprue holes. To form the product, a plunger forces rubber into the mold cavities using heat and pressure, which are maintained until the rubber has completely filled the mold cavities and cured or vulcanized.

A High-Quality, Low-Cost Alternative to Injection Molding

Unlike compression molding, transfer molded rubber is formed in a closed mold which allows for the production of more intricate parts. The cost to produce a transfer molded rubber product is greater than compression molding, but requires substantially less expensive tooling (or molds) than injection molding. With Cardinal Rubber Company you can be sure that your product will be produced with high quality and the lowest cost possible because we create them in-house from start to finish.

Equipment and Capabilities

Our transfer molding operations include three 4.5-inch diameter extruders and a Crowe Preformer that allows us to manipulate rubber into almost any shape needed for your product. We operate over 20 PLC controlled compression presses than can handle molds as big as 48 by 48 inches.

Please contact us to discuss how we can implement this cost-efficient process to suit your needs.