Patent ID: 9481116
Filing Date: 2016-11-01
CPC Classification: B29C,B29K

Claim Text:
1. A method for manufacturing a defect-free sandwich component, the method comprising: inserting a semifinished product arrangement comprising two layers, each of which comprises at least one dry semifinished product tissue, and a closed-cell rigid foam between the two layers, as starting materials of the sandwich component in a tool device; in a first heating phase, heating the semifinished product arrangement to an infusion temperature; introducing a matrix material flowable at the infusion temperature in the semifinished product arrangement during an infusion phase; in a second heating phase, stepwise increasing a temperature of the semifinished product arrangement to a curing temperature in partial steps so that each partial step presents a temperature increasing portion and a temperature holding portion so as to achieve a temperature equalization within the semifinished product arrangement; during a curing phase, at least partially curing the matrix material before, during, and/or after the second heating phase to form skin layers comprising at least parts of the dry semifinished product tissues and a connection area for a full-surface connection of the closed-cell rigid foam and the skin layers, at least in portions thereof; and cooling the semifinished product arrangement to ambient temperature during a cooling phase, wherein the semifinished product arrangement is provided with a flowing aid and surrounded by an arrangement of sheets, and the matrix material is introduced into the semifinished product arrangement by negative pressure.