The present invention provides an environmentally-friendly, fully recyclable composite mining screen which has sufficient rigidity to replace existing metal and metal covered plastic mining screens. The inventive composite screen insert contains stiff reinforcing fibers (glass, carbon, etc.) and exhibits the rigidity of metal and metal-covered plastic mining screen inserts so as to minimize deflection in use. The inventive mining screen is also completely recyclable because at the end of its useful life, the broken and used screen can be ground into polymer particles and the particles incorporated into new screens or other parts.

A method and device for injection moulding, in particular for micro-injection moulding, at least comprising a mould with a first mould half and a second mould half, wherein the first mould half and the second mould half define an injection moulding space in the closed state of the mould, and an insert arranged in the injection moulding space.

The present invention provides an environmentally-friendly, fully recyclable composite mining screen which has sufficient rigidity to replace existing metal and metal covered plastic mining screens. The inventive composite screen insert contains stiff reinforcing fibers (glass, carbon, etc.) and exhibits the rigidity of metal and metal-covered plastic mining screen inserts so as to minimize deflection in use. The inventive mining screen is also completely recyclable because at the end of its useful life, the broken and used screen can be ground into polymer particles and the particles incorporated into new screens or other parts.

Embodiments of the present invention relates to an acoustic metamaterial, as well as to a method for manufacturing the same. The acoustic metamaterial includes a plurality of channels or columns each having the same cross-section with a hydraulic radius between 5 and 300 ?m, which channels or columns are arranged with a periodic spacing between 2 and 600 ?m. This results in a highly dense network that can provide optimal acoustic absorption and/or impedance over a wide frequency range. The method for manufacturing the same includes additive manufacturing with a plurality of consecutive material deposition steps to form, in each step, a layer comprising a plurality of periodically repeated cells separated by walls. The layers deposited in the consecutive material deposition steps are stacked with their respective cells aligned to form channels.

Curing cauls formed of a one-piece three-dimensional resiliently shape-retentive fiber-reinforced body are provided, whereby the body includes a fibrous sheet coated with at least one layer of a cured elastomeric resin. The fibrous sheet may be embedded within the cured elastomeric resin, with the body having a stiffened perimetrical edge region and a stiffened ridge region vertically spaced from the edge region.