| 摘要 |
The invention relates to a method of and a device for the manufacture of dimensionally stable, liquid-impermeable, flexible, elastic pressbands, particularly for use with broad-nip shoepresses of paper making machines. The method comprising pouring a flowable mixture of a prepolymer onto a substrate moved by a distance maintaining device over a cylindrical mandrel and maintained during this movement in an adjustable distance from the surface of said mandrel, and being coated during this movement by a coating device with a flowable prepolymer, wherein during this coating of the substrate threads or wires are laid down onto the substrate in the direction of rotation of the mandrel and are coated with the polymer substance. In order to provide a method of the initially specified kind in such a way that the manufactured pressbands have the required high strength and tensile stability and that they are able to maintain both over long times of operation, the invention proposes that a net, texture, knitted fabric or a similar structure is used as substrate tensioned over the surface of the mandrel and consisting of non-woven threads located transverse to the longitudinal direction of the pressband and forming meshs the width thereof is chosen dependent especially on the viscosity of the prepolymer mass such that the meshs are completely impregnated by the prepolymer mass poured onto the meshs and that the threads of the net, texture, knitted fabric or similar structure are completely coated by the meshs forming on the side opposite to the surface of the mandrel a closed, smooth surface of prepolymer material, the thickness of which corresponds to the distance of the substrate from the surface of the mandrel, which polymer material can be separated from that mandrel surface.
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