Production of a plurality of different fiber composite components for high volumes in a continuous process
The present invention relates to a novel process for the production of novel fibre-reinforced profile materials filled with a rigid foam core, especially a PMI foam core. In particular, the present invention relates to a novel process which, in various versions, provides a particularly high throughput and allows a very wide range of shaping options. One step here continuously produces a complex fibre-reinforced profile material and simultaneously inserts the rigid foam core into same. In addition, in the same process step, very good binding of the rigid foam core to the fibre-reinforced profile material is assured. Shaping further takes place in two or more moulds simultaneously to achieve a particularly high throughput and simultaneously produce profile materials differing in shape.
1. A process for the continuous production of fibre-reinforced profiles comprising a foam core, said process comprising:
a) introducing the foam core and connecting the newly introduced foam core to an end of a most recently introduced foam core, in a pultrusion plant,
b) wrapping a fibre material around the foam core, to obtain a wrapped foam core comprising a fibre-material wrap,
c) impregnating the fibre-material wrap with a resin,
d) inserting different portions of the wrapped foam core in two or more moulds simultaneously, wherein the two or more moulds are situated on rowed mould carriages or in a row on one mould carriage in a position 1 at a downstream end of the pultrusion plant, and closing the two or more moulds,
e) heating the two or more moulds to shape the wrapped foam core and optionally cure the resin,
f) transporting the rowed mould carriages or the one mould carriage in a direction of transport of the wrapped foam core into a position 2 and then opening the two or more moulds,
g) closing a transporting mould on a further carriage, in a position 2a, which is situated, viewed in the direction of transport of the wrapped foam core, behind the rowed mould carriages or the one mould carriage and transporting the wrapped foam core in the direction of transport into a position 1a, and also returning the rowed mould carriages or the one mould carriage to position 1, and
h) opening the transporting mould, separating individual profiles and removing the individual profiles, and also concurrent practice of a) to d).
2. The process of claim 1 , wherein the foam core takes the form of a plurality of successive individual pieces when it is continuously passed into the pultrusion plant, and the individual pieces are connected to one another by adhesion bonding or insertion or through addition of a coupling piece.
3. The process of claim 1 , wherein the fibre material comprises carbon fibres, glass fibres, polymer fibres, aramid fibres, textile fibres, or carbon fibres, used in the form of individual fibres, ravings and/or nonwovents, wovens and/or scrims, and
the resin comprises a thermoset, wherein the thermoset may be a material formed from a polyester, vinyl ester, phenolic, polyurethane or epoxy resin.
4. The process of claim 1 , wherein the foam core is made of poly(meth)acrylimide.
5. The process of claim 4 , wherein the foam core is made of polymethacrylimide with a density in a range of from 30 to 200 kg/m 3 .
6. The process of claim 1 , wherein b) takes place by analogy with a pultrusion process with foam core introduction in the form of a modified pul-preforming, pull-winding or pul-braiding process.
7. The process of claim 1 , wherein the process is practiced as a pul-shape process wherein c), d), e) and f) are practiced in the same moulds in each case.
8. The process of claim 1 , wherein the process is practiced as a pul-press process wherein to d) are carried out in mutually separate moulds/devices, optionally the wrapped foam core is preshaped in further moulds between c) and d), and c) takes place before b).
9. The process of claim 1 , wherein d) to f) are conducted concurrently in two or three moulds.
10. The process of claim 1 , wherein the moulds of d) to f) produce different shapes and thus lead to different profiles as end product.
11. The process of claim 1 , wherein the process can produce at least 70 fibre-reinforced profiles per hour.