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Structural Foam Molding is used to produce bulky items overcoming warping, cracking, shrinkage and much of the built-in-stress found in conventionally molded thick components. The surface aesthetic imperfections associated with structural foam molding often require a finishing operation by painting, lacquer spraying, dipping, veneering or covering with fabric material unless these surface imperfections are exploited to obtain a wood-like effect through coloring process. The “piggy back” injection system extensively used by Presma is the perfect touch in structural foam. A preset quantity of material is extruded into two punching cylinders and subsequently injected directly into the cavities of the mold through two or more nozzles.
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