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Compression molding in polymer matrix composites

Key words compression molding, sheet molding compound, mold design, flow and cure analysis, fiber orientation and separation. [Pg.47]

In the compression molding process, the desired quantity of material is placed between the upper and lower molds, and the material then is formed into the final shape by pressing the mold as illustrated in Fig. 3.1. [Pg.48]

The compression molding process is composed of four basic phases. [Pg.48]

Curing . After the mold cavity is completely filled with the precharge material, the mold is kept closed while the molding pressure is maintained for a pre-assigned period of time. During this period, the resin is cured and the part is consolidated. The curing time depends on the resin mixture formulation, part thickness and mold temperature. [Pg.48]

Part release Once the resin is cured and the part is solidified, the part is removed from the mold with the aid of ejector pins. Then, the part is cooled down outside the mold, while the mold surfaces are cleaned, and an external mold release agent is applied to the mold surfaces for the next molding cycle. [Pg.48]

Compression molding in polymer matrix composites The drag force can be computed by the following relation ... [Pg.87]

Londono-Hurtado, A., Hemandez-Ortiz, 1. P. and Osswald, T. A. (2007), Mechanism of fiber-matrix separation in ribbed compression molded parts . Polymer Composites, 28(4), 451-157. [Pg.94]

The size of the metal particles relative to any structure present in the polymer matrix can also affect the value of pc. Segregated composites have been prepared by compression molding a mixture of metal and polymer particles [35]. When the radius of the polymer... [Pg.846]

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Composite matrices

Compositions molding

Compression molding

Compressive composite

Compressive polymer

In-mold molding

Matrix composition

Polymer matrices

Polymer matrix composites

Polymer mold

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