Patent ID: 8043542
Filing Date: 2011-10-25
Classification: B29C,B29K,B29L

Abstract:
1. A method for the production of molded parts made of fiber-reinforced poly-propylene, wherein a pre-cut part A with a length of 1000 to 2000 mm and a width of 300 to 1000 mm of a flat semi-finished product made of fiber-reinforced polypropylene with a content of reinforcing fibers of 35 to 80 wt.-% and a content of uniformly distributed air pores of 20 to 80 vol.-% is heated to a temperature above the softening point of the polypropylene, placed into a two-part mold, pressed and thereby molded, wherein prior to molding one or several strips B with a width of 20 to 100 mm made of polypropylene with a content of reinforcing fibers of 0 to 60 wt.-% and a content of air pores of less than 5 vol.-% which were heated to a temperature above the softening point of the polypropylene are placed in the mold, the strips overlapping the pre-cut part A with an overlap region of 5 to 50 mm on average, and are pressed together with the part A, where a pressure of 100 to 250 bar is built-up where the pre-cut part A and the strips B overlap, whereby the strips B flow into a boundary region of the mold adjoining the pre-cut part A.