| 摘要 |
Method and apparatus for producing items of composite materials such as for example fibre reinforced material such as glass fibre reinforced epoxy or polyester, which items constitute partly closed structures containing cavities. By the method the following steps are made: reinforcement material such as fibre and/or matrix material, which possibly is pre-impregnated with moulding material, is placed around at least one moulding core consisting of an outer part of a flexible material, in which outer part there is a mouldable and extractable filling material, the reinforcement material being mould with moulding material, the composite material afterwards hardening or curing, and the extractable filling material of the moulding core afterwards being taken out through at least one opening in the outer part of the moulding core and through at least one opening in the item produced. By the method it is obtained that items may be produced constituting partly and even almost completely closed structures in substantially one piece by means of an extractable core, as the filling material of the moulding core after finishing is taken out through at least one opening in the item. |
