A porous material provided with a reactive component capable of reacting with an infusion resin is provided. In addition, a method of producing a wind turbine blade or a part thereof is described, the method including providing a mold containing the porous material, applying an infusion resin into the mold by a vacuum infusion method, in particular vacuum assisted resin transfer molding, and curing the infusion resin. A wind turbine blade or a part thereof obtainable by this method is also provided.

Resin infused composite parts are fabricated using a caul sheet having perforations therein for optimizing the flow of resin through the parts. The method allows for a simplified tooling and consumable arrangement for complex parts while achieving a smooth, aerodynamic caul-side or bag-side finish. The component may be placed in direct contact with a tool, and the caul sheet may be placed in direct contact with the component thereby eliminating the necessity for consumables between these items.

Manufacturing a blade by arranging a plurality of layers are in a mould. A matrix material is injected, through an inlet which is partly integrated into an inner surface of the mould, into the plurality of layers injecting the matrix material.

A resin barrier device (5) for an infusion tool (1) includes a tubular intermediate piece (15) having a first end (17), which is adapted for connection to a venting outlet (3) of an infusion tool (1), having an opposite second end (19) adapted to be connected to a ventilation line (7), and having a channel (27) surrounded by a pipe wall (25), which forms a fluid connection between the first end (17) and the second end (19), and a semi-permeable barrier wall (29) provided in the channel (27), which is arranged to let an airflow pass from said first end (17) to said second end (19) and to block a resin flow from the first end (19) to the second end (19).

A mold for manufacturing products made of composite materials, which comprises at least one functional portion made of a composite material joined to at least one interface made of a composite material which projects at least partially around the functional portion, said mold being provided with one or more mechanic fastening devices for the coupling with at least another mold.

A method for producing FRP in which a preform made of a reinforcing fiber base material is disposed in a cavity of a mold, a resin injection path and a suction path that sucks at least air are provided to the mold, and resin from the resin injection path is caused to flow in the direction toward the suction path in the cavity to be impregnated into the preform, wherein a high flow resistance region for partially making the resin flowing in the preform hardly flow is formed in the preform itself, and a flow front of the resin flowing in the direction toward the suction path through the high flow resistance region is controlled to settle within a permitted region that has been predetermined relative to a shape of a product to be molded.

A pressing tool is provided for producing fiber composite components, including a first tool part and a second tool part moveable relative to the first tool part. In the closed state of the pressing tool, the two tool parts form a shaping cavity for accommodating a fiber semi-finished product to be shaped and each have a tool surface delimiting the cavity. In addition, at least one of the tool surfaces has at least two adjacent flat sections inclined toward each other which are connected to each other by way of a curved transition section. The curved transition section has at least one groove-shaped recess facing the cavity.

A device for compacting and consolidating a stack of fibrous plies pre-impregnated with a thermoplastic polymer, configured to be placed in an oven. The device comprises containment blocks, a flexible compacting plate and a vacuum pump. The containment blocks are supported by a board and demarcate the perimeter of the stack. The containment blocks comprise open grooves that open into the perimeter of the stack. The flexible compacting plate has an area equal to that of the stack but is capable of being inserted inside the perimeter demarcated by the containment blocks. The vacuum pump applies a vacuum to the wrapped volume of the stack comprising a plurality of holes in the board that open outside the perimeter of the stack. A method for implementing the device for manufacturing a thick composite panel having a thermoplastic matrix.

The present invention relates to a method of moulding a composite article using a mould. The mould includes first and second rigid mould parts between them defining a mould cavity. A reservoir of resin is connected to an inlet into the mould cavity. A suction pump is connected to a port on the opposite side of the mould cavity from the inlet. At least one of the mould parts has an arrangement of grooves on the surface facing the mould cavity to distribute resin across the mould cavity. The method includes laying up fibres in the mould cavity, injecting resin from the reservoir by running the suction pump to fill the mould cavity with resin, curing the resin article to form a moulded article and opening the mould and removing the article.

A resin-infusion system for manufacture of a composite part includes an inflatable rigid bladder defining at least one infusion-flow medium and a preform lay-up formed on the bladder such that the infusion-flow medium defines space between the bladder and preform lay-up. The system also includes a mold into which the bladder and preform lay-up are placed such that the preform lay-up is constrained against the mold a resin injection system configured to feed resin into and to flow along the infusion-flow medium and then be infused into the preform lay-up. The bladder is configured to expand against the infused preform lay-up during curing such that the infusion-flow medium is smoothed resulting in a smooth surface of the finished part.