초록 ▼

A molding method and an impact resistant automotive part such as a bumper beam resulting from the molding method are obtained wherein a thermoplastic reinforced fiber structure at least partially forms a pair of attachment portions of the part and continuously extends between the attachment portions

A molding method and an impact resistant automotive part such as a bumper beam resulting from the molding method are obtained wherein a thermoplastic reinforced fiber structure at least partially forms a pair of attachment portions of the part and continuously extends between the attachment portions to link the attachment portions. The method includes the steps of providing a plurality of blanks, heating the plurality of blanks, and stacking the plurality of blanks to form a stack of blanks. The stack is then stamped to form the part including the pair of attachment portions spaced a predetermined distance apart. The thermoplastic reinforced fiber structure has tows of fibers wetted by a resin material such as polypropylene. Preferably, the fibers are woven glass fibers.

대표청구항 ▼

A molding method and an impact resistant automotive part such as a bumper beam resulting from the molding method are obtained wherein a thermoplastic reinforced fiber structure at least partially forms a pair of attachment portions of the part and continuously extends between the attachment portions

A molding method and an impact resistant automotive part such as a bumper beam resulting from the molding method are obtained wherein a thermoplastic reinforced fiber structure at least partially forms a pair of attachment portions of the part and continuously extends between the attachment portions to link the attachment portions. The method includes the steps of providing a plurality of blanks, heating the plurality of blanks, and stacking the plurality of blanks to form a stack of blanks. The stack is then stamped to form the part including the pair of attachment portions spaced a predetermined distance apart. The thermoplastic reinforced fiber structure has tows of fibers wetted by a resin material such as polypropylene. Preferably, the fibers are woven glass fibers. heet) without flow marks and air pit is capably provided with high efficient production to upgrade the quality of plastic film (sheet), which is included the following steps: calendering melted plastic material by calenders into melting plastic film (sheet) with predetermined thickness, quickly chilling and setting the melting plastic film (sheet) with chilling water, removing water from the cooled plastic film, heating the plastic film to dry out any residual water and controlling the plastic film again to a temperature from 30° C. to 85° C., and applying a pressure ranging from 1 kg/cm2to 8 kg/cm2on the plastic film (sheet) while winding it into a roll. Plastic film (sheet) produced with this method has good transparency and smooth surface without flow mark and air pit.