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Sheet Molding Compound Preheater An RF technology preheater for plastic sheet molding compound (SMC) that enhances the distribution of reinforcement fibers, reduces press cure time by 50% and is especially effective for thicker bosses and structures is being introduced by Radio Frequency Co., Inc. of Millis, Massachusetts. The Macrowave™ SMC Preheater provides uniform heating throughout the entire thickness of the sheet molding compound instantly, without requiring any temperature differential to force heat by conduction from the surface to the center. Facilitating the movement and distribution of fibers throughout molded parts, improving their strength and surface finish, this RF preheater reduces press cure time by 50%, claims the firm.  Capable of preheating SMC loads up to 30" W x 84" L in under one minute, the Macrowave™ SMC Preheater has a PLC which controls the heat cycle time, power level, and conveyor movement to synchronize with the press operation. For optimizing efficiency, the conveyor can either feed the SMC charge straight through the press or return it to the feed end after heating. The Macrowave™ SMC Preheater is priced from $75K up, depending upon belt size and other customer requirements. Literature is available on request.
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