Apparatus and process for the production of sandwich composite elements
An apparatus for the production of sandwich composite elements which includes at least two feed apparatus for facings, to which an application apparatus for an adhesion promoter, an application apparatus for a core layer, a conveying apparatus and a cutting apparatus are connected one after the other. The application apparatus for the adhesion promoter includes at least one feed line for the adhesion promoter, a rotary table with at least one lateral outlet orifice and a drive for the rotary table.
1. A process for the production of sandwich composite elements with an apparatus comprising:
a) at least two feed apparatuses for facings to which
b) an application apparatus for an adhesion promoter,
c) an application apparatus for a core layer,
d) a conveying apparatus and
e) a cutting apparatus
are connected one after the other, in which the application apparatus for adhesion promoter comprises:
1) at least one feed line for the adhesion promoter,
2) a rotary table with
(i) at least one lateral outlet orifice and
(ii) a drive,
said process comprising:
A) applying an adhesion promoter to a lower facing,
B) introducing a core material between the facings,
C) conveying the composite to a collection point.
2. The process of claim 1 in which the adhesion promoter is applied using a rotary table rotating at a speed of from 2500 to 8000 rpm.
3. The process of claim 2 in which the conveying apparatus moves the composite element at a speed of from 2 to 20 m/min.
4. The process of claim 1 in which the conveying apparatus moves the composite element at a speed of from 2 to 20 m/min.
5. The process of claim 1 in which the adhesion promoter is discharged in an amount of from 200 to 1600 g/min.
6. The process of claim 1 in which a two-component polyurethane-based adhesion promoter is used.