Method of producing a panel and a core therefor

A method of producing a panel, the method comprising:

• placing an assembly on a mold, the assembly comprising
• core elements, the core elements each having
• a first groove extending transversely to an injection line extending across the mold, the first groove extending in a first surface of the core element, and
• side wall grooves provided in side walls that extend in a direction parallel to the first groove,
• the first groove and the side wall grooves all being separated from one another, and
• impregnatable material webs extending along and between the core elements,
• the assembly including a first side and a second side situated opposite the first side;
• enclosing the assembly under a cover layer by sealing, the assembly being enclosed under the cover layer in relation to the position of the mold;
• introducing at least one inlet for injection material, the inlet ending at the first side of the assembly;
• connecting the space, enclosed by the cover layer and the mold, to a discharge;
• injecting the injection material via the inlet on the first side of the assembly and causing the injection material to move along via paths formed by the material webs between the core elements;
• causing the injection material to flow laterally from the first groove situated in the first surface via the material of the material webs as far as into the side wall grooves;
• and
• discharging air and/or gas from the enclosed space via the discharge by underpressure at a position which is at a different level in relation to the position at which the inlet ends.