DE7012474U - PLASTIC HANDLE WITH METALLIZED SURFACE FOR DOORS, HOODS OR. DGL. - Google Patents

Description

a »

• * ■ · β

Dipl.-lng. G. SdlHebs 61 Darmstadt Claudiusweg 17A J

Patent attorney phone (06151) 46753

Postal checking account: Frankfurt a. M. 111157 Bank details: Deutsche Sank AG., Darmstadt Telegrams: inventron

To the

German Patent Office

Munich 2
Zweibrückenstrasse 12th

Your reference your letter My ^{reference J 1} 097 V ^Ta a 15-8.72

Subject: Utility model registration G 70 12 ^^ -. 2. Applicant: Hohe KG, 6981 Collenberg / Main

Plastic handle with a metallized surface for doors, hoods or the like.

One of the hallmarks of modern materials research is targeted Improvement of material properties through the development of composite materials. So vrarde through the solid Composite of ABS plastics with metal a composite material created which, thanks to its interesting properties, has opened up completely new areas of application for ABS polymer; Optical and mechanical properties of the surface are determined by the metal layer and its structure, strength, Hardness and elasticity, on the other hand, are due to the toughness of the submetallic Plastic substrate. Light weight and the easy formability of the plastic are also very good from the point of view of economical production Interesting. Even complicated parts can be electroplated without the reworking required for comparable metal parts will.

Although the rigidity of galvanized plastic parts can be several times that of untreated plastic parts, because the Deformation: r; work in the case of bending, bending or torsion initially is predominantly not absorbed by the I-.et ^ llsc, so

for the Auflraosverhälfnis the fee oriijjn iir ^ e ^ sciy / olentonwoltsfcomrner Genchfsstond for performance -> nd payment ι Darmstadt

Conversation "fcrUFerisjaecipr fnAfcn fafe ] tj & \ Hfe / imuUci * e Wirk", ng 1

it is not yet sufficient for many purposes, and it is a major disadvantage of the plastic / metal composite is that when the load limit is exceeded with hard, nickel-rich conditions, as is predominantly required v / ground, the metal layer suddenly tears and the sudden rise in tension in the plastic causes the Ptiss to appear as Notch propagates through the entire cross-section, i.e. the workpiece breaks.

j For example, galvanic plastic parts have also been found in the Be able to introduce the automotive industry in a variety of ways, but so far only for less stressed parts such as Ljj ± egel caps, Decorative wheel rings, lamp housings, etc., on the other hand, have to be subjected to stressed parts such as handles for doors, hoods, trunk lids ο the like. continue to be manufactured in zinc die casting with all the disadvantages of the wage-intensive advantages, intermediate and post-treatment of the galvanic process.

The invention has the task of looking for V / ege to To be able to use such plastic parts with a metallized surface also for highly stressed components does it to significantly increase mechanical strength.

After extensive experiments, the invention proposes that the plastic body of a SOrmteiles before metallizing, to be reinforced with a metal core during its manufacture, and this metal core should preferably essentially be already have the contour of the molded part, but with an undersize in the thickness of a plastic layer as a carrier the metal layer forming the surface.

Although it is known to use metal parts in plastic IOrmteile Sockets, screws and the like to be injected for later connection with other parts, but this is the case only about the forces from the connection point in

the. Initiate plastic body. In contrast, the general idea of the invention is the known duplex composite material , e.g. a galvanized ABS plastic, into one To expand triplex composite material, in which the plastic essentially has the task of being the ultimate To form the surface contour and structure and to be the carrier of the metallic surface layer. - That this thought was by no means obvious, shows a report on a symposium on ABS composites and their production ("Galvanotechnik", 1969, Issue 7), on which the experts presumably over the problem on which the invention is based is discussed, but its significance is weakened or merely suggested was to adapt the molded parts to the demands by appropriate shaping. In contrast, according to the invention Molded parts can also be used interchangeably and without changes.

The strengths of metal core and plastic coating are to be chosen so that under the aspects of the lightest possible weight of the Foi-mteiles and favorable manufacturing costs the impact resistance of the tough sub-metallic plastic substrate is retained and the tensile, compressive and

* · Ί: ο on Ac * ~ n Ηοταΐ "ΙΊτ οττι ijl ^ g • pTrpagori USCL

be absorbed before the load limit of the outer metal layer is exceeded.

\ 23 The manufacture of molded parts according to the invention involves

\ process steps known per se, namely in

the way that a metal core is first produced by a metal casting process, which essentially already'die Xontur of the prefabricated part has that subsequently this metal core to create the final shape and surface structure of the molded part with a metallizable plastic encased, preferably encapsulated and that finally the reinforced plastic body by a galvanic process is metallized.

The invention is explained below using the example of a door handle for a car. In the drawing are the individual. Layers above the metal core 1 partially removed. It can be seen that this core is essentially the details of the finished handle shows. It has an undersize in the thickness of the plastic layer, the surface of which has the surface structure of the handle, e.g. bare, velor, grained or any other desired structure. The metallic surface 4 is produced by electroplating in a drive-through process; a finish, i.e. re-polishing or the like. is not necessary. The metal core is made of die-cast zinc, the plastic casing is made of an injection-molded ABS plastic, the metal layer made of chrome with a nickel and copper substructure.

The invention has a very broad field of application which cannot even be defined here. The term ABS plastic stands for all that can be coated Plastics, e.g. also ABS graft polymers, polypropylene etc. Instead of a rigid die-cast core, other reinforcements can also be used in special cases, e.g. a Stealing rope 5 (Fig. 2), if special elasticity is required will. Instead of a plastic jacket produced by injection molding, a shrink tube can optionally also be placed over the Metal core can be pulled.

Claims (2)

Protection claims 1. Handle the plastic with a metallized surface for Doors, bonnets, trunk lids or the like., Characterized in that, that the plastic body with a Meta11-kem is armored. 2. Handle according to .Anspruch 1, characterized in that the Metal core essentially has the contour of the standard part with an undersize in thickness of a plastic layer as of the metal layer that forms the surface 3! ·. Handle according to .Anspruch 2, characterized in that the Strengths of the metal core and plastic coating are that the impact resistance of the plastic layer is retained and the tensile, compressive and torsional forces are transferred to the metal core and absorbed by it ■ become, faire before the "load limit of the outer metal seal exceeded v / ird.