Waste mixture spreading device

Abstract

Waste mixture spreading device, wherein the waste mixture spreading device has at least one surface element for receiving, conveying and spreading the mixture, wherein the surface element is oscillating back and forth by means of a drive means, wherein the surface element comprises a metallic core and a non-metallic coating that at least partially surrounds this metallic core, characterized by the fact that the non-metallic coating consists of polyurethane.

Description

[0001] The invention relates to a waste mixture spreading device according to the preamble of claim 1.

[0002] Spreading devices for the dispersion of a mixture of substances, in particular a mixture of waste, are known from the prior art, for example from EP 2 540 647 A1. Such spreading devices function via oscillating movements of planar surface elements, wherein the oscillating movement corresponds to a translational movement superimposed with a lifting or lowering movement.

[0003] Document EP 2 540 647 A1 further discloses a spreading device for accumulations of material mixtures with a material input area and a material output area, particularly for a recycling plant, comprising at least two elongated conveying elements arranged side by side, which form a support surface for an accumulation of the material mixture, at least one, preferably two, eccentric shafts arranged below them with eccentrics arranged thereon, each of which is rotatably mounted in an eccentric bearing, wherein each eccentric bearing is connected to the conveying element arranged above it, and wherein the eccentrics in the eccentric bearings generate a vertical acceleration in the form of an up-and-down movement as well as a horizontal displacement in the form of a back-and-forth movement of the conveying means. According to the invention, a lever joint is additionally arranged between at least one eccentric bearing and the conveying element connected thereto.

[0004] Furthermore, document WO 98 / 32 679 A1 discloses a device comprising a table composed of a plurality of table elements. The elements oscillate synchronously in the x and y directions and vertically, the phase relationship of the vertical oscillation relative to that in the x direction being adjustable.

[0005] Furthermore, document DE 10 2004 022 060 A1 discloses a conveying device for transporting conveyed goods and a method for operating the conveying device.

[0006] The surface elements typically incorporate grid or perforated structures, so that during the spreading of the material mixture, the moving surface elements already constitute the first link in a sieve chain of a separation device. Due to the high mechanical stress, the surface elements are usually made of metal, especially steel.

[0007] According to the operating principle described in the prior art EP 2 540 647 A1, to which reference is made hereby made and whose disclosure is made by reference to the content and subject matter of this application, a transfer of the motion dynamics of the oscillating surface element to the mixture of substances to be spread and transported is required. This dynamic is crucial for the efficiency and spreading speed of the mixture of substances in the system and represents a factor in the achievable volume flow rate, alongside other system parameters.

[0008] The object of the invention is to improve the volume flow of a corresponding system, in particular to optimize the transfer of the motion dynamics of a surface element to a mixture of substances to be spread.

[0009] This task is solved, starting from the general term of claim 1, by the characterizing features of claim 1.

[0010] Advantageous further training opportunities and appropriate design options are specified in the dependent requirements.

[0011] The waste mixture spreading device is provided that the spreading device has at least one surface element for receiving, conveying and spreading the mixture of materials, wherein the surface element can be moved back and forth in an oscillating manner by means of a drive means, wherein the surface element comprises a metallic core and a non-metallic sheathing that at least partially surrounds this metallic core.

[0012] Applying a coating around the metallic core, made of a non-metallic material, particularly plastic or rubber, improves the static friction properties of the mixture on the surface element and, during its oscillating movement, results in better transmission of the dynamic motion to the mixture resting upon it. Since, in conventional systems known from the prior art, several surface elements are moved side by side in essentially counter-rotating directions, this generates improved overall dynamics in the dispersion of the mixture, thereby significantly increasing the volume flow rate in the system and the efficiency of the dispersion.

[0013] In an advantageous embodiment, the surface element comprises a grid structure, wherein at least a part of the grid structure is formed from grid-forming longitudinal and transverse struts, and these grid-forming longitudinal and transverse struts are at least partially covered with the non-metallic coating.

[0014] The grid structure allows the spreading device to function as a sieve in the first step, removing initial fractions of a specific size. Partial coating on the top surface or contact side with the material mixture offers the advantage that separated components are less likely to become stuck and can more easily exit the sieve structure downwards.

[0015] In principle, it is sufficient to apply the appropriate coating only to those areas that come into contact with the fraction of the material mixture to be spread. However, it can also be economically advantageous to apply the coating, for example by dipping or spraying, thus creating a complete coating of the entire body, especially the lattice structure. Individual segments that can be assembled into a surface element can also be easily and cost-effectively coated in this way, either by dipping, spraying, or painting, with a suitable hardening coating that remains liquid during the application process, such as rubber or similar materials.

[0016] Suitable materials for forming a coating include, for example, polyurethane (PU) as an elastomer or another type of rubber. Such materials are sufficiently impact-resistant and abrasion-resistant to achieve the required service life of the corresponding surface elements for use in such spreading devices, while still providing sufficient static friction to deliver the advantage of the invention. After a certain period, a coating can be renewed, applied over, or repaired without significant effort and without having to completely remove the underlying layer.

[0017] Forming the casing with a fiber-reinforced material, especially a fiber-reinforced plastic, can also be particularly advantageous. Suitable fiber reinforcement materials include plastic fibers, carbon fibers, glass fibers, or metal fibers.

[0018] However, the invention is not limited to coating with suitable rubbers or polyurethanes. It also includes other coatings or coating processes that provide surface elements with non-metallic coverings for spreading devices. Other plastics or rubbers can also be used to improve static friction.

Claims

[1] Waste mixture spreading device, wherein the waste mixture spreading device has at least one surface element for receiving, conveying and spreading the mixture, wherein the surface element is oscillating back and forth by means of a drive means, wherein the surface element comprises a metallic core and a non-metallic coating that at least partially surrounds this metallic core, characterized by , that the non-metallic coating consists of polyurethane. [2] Waste mixture spreading device according to claim 1, characterized by that the non-metallic coating is designed as a plastic coating or rubber coating. [3] Waste mixture spreading device according to claim 1 or 2, characterized bythat the surface element comprises a grid structure, wherein at least part of the grid structure is formed from grid-forming longitudinal and transverse struts and the grid-forming longitudinal and transverse struts are at least partially covered with the non-metallic coating. [4] Waste mixture spreading device according to one of the preceding claims, characterized by that the non-metallic coating comprises plastic fibers or glass fibers. [5] Waste mixture spreading device according to one of the preceding claims, characterized by that the non-metallic coating consists of a fiber-reinforced plastic.