BE1004635A3 - A modular rack segments nylon prints on a metal core. - Google Patents

Abstract

The invention proposes a composite rack made up of modular nylon segments produced consecutively by stamping on a metal core without a solution of continuity, ensuring the rigidity and the mechanical resistance of the thermothermed rack.

Description

       

   <Desc / Clms Page number 1>
 



  Rack with modular nylon segments stamped on a metal core.



   The present invention relates to rack bars in general and to a rack made of plastic called nylon on a metal core such as steel bar, in particular.



   At present racks are made of metal such as steel or light alloys, so that their rigidity and their resistance to bending and torsion are ensured when they are in operation and subjected to a force. Metal racks still have drawbacks such as the lack of electrical insulation, the need for lubrication, the possibility of oxidation and a high noise level. On the other hand, attempts have been made to produce racks in non-metallic material but without success, either due to difficulties in stamping racks of any length, or due to insufficient mechanical strength which makes the product unreliable. .



   The present invention aims to eliminate the aforementioned drawbacks of known racks and therefore proposes a composite rack consisting of modular nylon segments produced successively by stamping on a metal core without any continuity solution, ensuring the rigidity and mechanical strength of the completed rack.



   The advantages which result from an embodiment according to the invention are: the possibility of making racks of any length, even when having relatively small equipment for molding nylon modules or segments on the metal core; - safe electrical insulation of the rack; - no need to lubricate the rack during operation; - optimal protection against oxidation and wear by surrounding agents; and - a reduced noise level when the rack is interacting with organs associated therewith.



   The attached drawing illustrates a practical example of a rack which will be described in more detail below.



   In the drawing: fig. 1 shows a perspective view of a rack end in the production phase; and fig. 2 shows a cross section.



   The rack in question is formed of a nylon body 10 stamped on a core 11 of metal, such as steel, with a toothing 12 and projections 13 for the subjection in operation of the rack.

 <Desc / Clms Page number 2>

 



   More particularly, the core 11 can consist of a metal bar of any length and without a solution of continuity, and the body 10 with a toothing 12 and projections 13 is stamped in the form of modular segments 10a, 10b, etc. on said bar 11.



   In practice, we start from the continuous metal bar 11, on which we overprint with a suitable equipment a first modular segment 10a of the body 10 with teeth 12 and projections 13, then we move the bar under the molding equipment to stamp the next modular segment 10b adjacent to the first, and so on until the end of the bar and in any case, until a rack of the desired length is set, optionally by suitably cutting the product produced.



   The rack therefore consists of consecutive segments of complete nylon body with at least the toothing on a rigid core consisting of the metal bar which guarantees adequate resistance of the assembly to bending and torsion.



   To ensure the adhesion of the body segments to the metal bar 13, the latter may be provided at the start with rough or pleated surfaces or else holes or notches for the material constituting said body.


    

Claims (3)

CLAIMS 1. Rack characterized in that it has a body made up of modular segments (1 Da, 10b, ...) made of plastic, nylon or the like, on a metal core (11) with no solution of continuity, each modular segment having teeth (12) and possibly projections (13), the metal core being formed of a metal bar.  2. Rack according to claim 1, wherein the modular segments (10a, 10b, ...) of said body are stamped consecutively one after the other on the continuous metal core until the desired rack length is obtained, said length can be adjusted if necessary by cutting.  3. Rack according to claims 1 and 2, wherein the metal core has rough or perforated surfaces for severe use with the segments of the over-stamped body.