초록 ▼

A composite part made from a sheet molding compound is disclosed as having improved characteristics over traditional sheet molding compound composite parts. The fibrous material is introduced as a veil layer adjacent a paste layer, the veil flows well during the molding process. The improved flow an

A composite part made from a sheet molding compound is disclosed as having improved characteristics over traditional sheet molding compound composite parts. The fibrous material is introduced as a veil layer adjacent a paste layer, the veil flows well during the molding process. The improved flow and surface characteristics of a composite part are attributed to the elongation of the veil during molding and to the improved filling capabilities.

대표청구항 ▼

What is claimed is: 1. A sheet molding composite sheet for use in structural reinforced compression molded composite parts, the sheet comprising in an uncompacted form between a pair of outer film layers: a first layer of resin paste applied to one of the pair of outer film layers; a second layer o

What is claimed is: 1. A sheet molding composite sheet for use in structural reinforced compression molded composite parts, the sheet comprising in an uncompacted form between a pair of outer film layers: a first layer of resin paste applied to one of the pair of outer film layers; a second layer of resin paste applied to the other of the pair of outer film layers; n layers of nonwoven discrete filaments or reinforcement fibers, wherein the filaments or fibers do not melt when exposed to a temperature of 200 degrees C. for twenty seconds; and (n-1) layers of resin paste volumetrically applied to between each of said n layers of reinforcement fibers using a volumetric paste extrusion device so as to provide alternating layers of nonwoven discrete filaments or reinforcement fibers and resin paste, wherein n is at least 2. 2. The sheet molding composite sheet of claim 1, wherein at least one of said (n-1) layers of resin paste is a bulk molding compound layer. 3. The sheet molding composite sheet of claim 2, wherein said bulk molding compound layer is volumetrically applied using a volumetric paste extrusion device having a bulk molding volumetric slit extrusion die. 4. The sheet molding composite sheet of claim 2, wherein said bulk molding compound layer contains low-density fillers. 5. The sheet molding composite sheet of claim 2, wherein said bulk molding compound layer contains recycled materials of various granulometry and morphology. 6. The sheet molding composite sheet of claim 1, wherein said first layer of resin paste is volumetrically applied using a volumetric paste extrusion device. 7. The sheet molding composite sheet of claim 1 wherein said first layer and said second layer are volumetrically applied using a volumetric paste extrusion device. 8. The sheet molding composite sheet of claim 1, further comprising introducing at least one layer of a preformed veil in place of a respective one of said layers of reinforcement fibers. 9. The sheet molding composite sheet of claim 1, wherein said veil comprises a binder substantially soluble in said paste. 10. A sheet molding composite sheet for use in structural reinforced compression molded composite parts, the sheet comprising in an uncompacted form between a pair of outer film layers: a first layer of resin paste applied to one of the pair of outer film layers; a second layer of resin paste applied to the other of the pair of outer film layers; n layers of irregularly shaped reinforcement filaments or fibers; and (n-1) layers of resin paste volumetrically applied to between each of said n layers of reinforcement fibers using a volumetric paste extrusion device so as to privede alternating layer of nonwoven discrete filaments or reinforcement fibers and resin paste, wherein n is at least 2. 11. The sheet of claim 1 wherein said fibers or filaments comprise glass fibers or filaments.