Patent ID: 9550331
Date: 2017-01-24
CPC Classifications: B29C

Claim:
1. A method for producing a composite molded part from fiber-reinforced plastics material, the method comprising: a) providing a prepreg semi-finished product including fibers that are pre-impregnated with a matrix material; b) encasing the prepreg semi-finished product with a flexible sheet material so as to form an inner arrangement, the flexible sheet material including at least one inner planar gas-conducting element and a gas-permeable membrane configured to hold back the matrix material, the gas-permeable membrane being disposed between the at least one inner planar gas-conducting element and the prepreg semi-finished product; c) encasing the inner arrangement formed by the prepreg semi-finished product and the flexible sheet material with a first gas-tight casing; d) positioning the inner arrangement provided with the first gas-tight casing on a first molding surface; d′) arranging at least one outer planar gas-conducting element on an outside of at least one surface region of the first gas-tight casing; e) encasing the inner arrangement provided with the first gas-tight casing and the first molding surface with a second gas-tight casing so as to provide an entire arrangement; applying a first negative pressure to the inner planar gas-conducting element and the inside of the first gas-tight casing; g) heating the entire arrangement for a first predetermined time at a first specified temperature; h) applying a second negative pressure to the inside of the second gas-tight casing via the at least one outer planar gas-conducting element; and i) heating the entire arrangement for a second predetermined time at a second specified temperature.