DE7119548U - COMPOSITE BODY FROM PREFABRICATED COMPONENTS - Google Patents

Description

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Composite body sub prefabricated components h

The innovation concerns composite bodies made from prefabricated components.

It is known to produce composite bodies from prefabricated components To manufacture extrusion, melting or injection molding, however Processing temperatures occur, below which only heat-insensitive Parts such as fittings, reinforcements, connecting parts, threaded bushes !! or the like. be embedded.

It is also known to reduce the specific volume resistance uid the particularly easy electrostatic chargeability of plastics these fillers (metal powder, Carbon black, graphite or the like. to add. Sa, however, only high proportions of fillers cause a noticeable reduction in chargeability, so will the mechanical properties of the plastic significantly worsened.

As soon as two electrically neutral bodies touch (e.g. plastic pipe -Air flow or rubber conveyor belt- plastic roller o.a.) there is a charge shift between negative and positive electrons in the area of the common contact surface. This shift can lead to an equal charge surplus on both parts. Become both — bodies of one another separated, an electric charge remains on both of them, the cannot flow off in the case of electrical non-conductors. When charging Large areas can generate charges that are so high that sparks occur in rooms with flammable gas or gas dust mixtures lead to explosions

In order to remedy the above-described shortcomings and to use heat-sensitive components in composite bodies, in addition to one Fully plastic body to prevent electrostatic charges, according to the invention, it is proposed, on the one hand, to be pre-assembled heat-sensitive components and on the other hand means sum Discharge of electrostatic charges, e.g. grounded, up to

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Surface of the composite body reaching contact wire tufts, by foaming in rigid foam plastic, it is inseparable into a compact » Unite ready-to-use unit.

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j and after it has hardened eehr druokfest »thus become the Pre-assembled components are not subjected to any changes caused by heat. The component or components also form the immediate plastic a compact »ready-to-use body or a compact, ready-to-use construction. A special part of the gate can be seen in the "that" in the relevant component necessary substances such as lubricating grease, electronic parts and the like are completely shielded from the environment and from any intervention are inaccessible from outside.

The bla bar surface of the composite body reaching “at the same time Miieincesohäuaten prevent contact wire tufts as a result of their Dsdeü arranged point-like on the surface -by division of the total area electrically into smaller sub-areas - the emergence of dangerous loads that occur, for example, due to friction between a conveyor belt and a carrier roller made of rigid foam plastic

The outer surface of the composite body is advantageous with an electrical Provide a conductive protective layer against wear

Each is an exemplary embodiment that does not limit the invention on the drawing a support roller for conveyor belts schematieob in shown in a longitudinal section

The support roller is mounted in a holder 1 that is earthed with the supporting structure, consisting of the axis 2, the bearing 3 and the one around the axis 2 rotatable roller body 4 consists. On the bearing 3 in the bearing housing 5 there is a conductive spacer ring 6 (preferably made of metal) arranged, der.das inner tube 7 carries. This is similar to that a roller brush, with contact wire clusters reaching up to the roller surface 8 occupied, which at intervals on the dumbbell

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fläoh · arranged radially and one below the other by grounding wires 9 are connected »who are in contact with Dietanzrlng 6. On theeae Way, dangerous electrostatic charges become during dta run of the conveyor belt 10 is derived into the grounded frame.

711854819.8.71

Claims (2)

Claims ~> 1) Composite body, e.g. support roller for conveyor belts or the like., Characterized in that on the one hand pre-assembled heat-sensitive components and, on the other hand, means for discharging electrostatic charges, e.g. earthed, Contact wire bushes reaching to the surface of the composite body, due to foaming in rigid foam, it is inseparable into a complete, ready-to-use unit united. 2) composite body according to claim 1, characterized in that the outer surfaces of the composite body with an electrical Z Provided conductive and / or wear-resistant protective layer are. 71195A819.8.71