Fibre reinforced plastic moulding with integrated antenna

The invention relates to a fiber reinforced plastic molding.

A fiber-reinforced plastic Molded shows z. B. EP 0531840 B1. Here is first one provided with a binder from a resin-hardener system fiber Malte at a temperature at which the resin-hardener system behaves thermoplastically, pre-formed and subsequently cured thermoset to the preform. subsequently is sheet molding compound (UP resin, glass fiber reinforced) to the thus prepared abandoned preform and compressed with this for-formed.

Depending on customer requirements have up to six antennas housed per vehicle will. The car designer is faced with the task to accommodate these find antennas on the vehicle.

With antennas are here generally transmitting and / or receiving antennas for. B. Radio equipment, Radios, cellular telephones etc. meant.

The invention is based on the object of antennas save space with fiber reinforced Plastic moldings to join.

This object is achieved in that the fiber-reinforced in Molded plastic part is integrated at least one antenna. This are new designs possible z. B. in portable radio, televisions or mobile phones.

In a preferred embodiment, the fibers that for reinforcement of the molded part be eingesetst, an electrical conductivity. For these fibers, the antenna and the antennas are formed.

Carbon fibers have been found to be particularly useful, since they both have electrical conductivity and a good tensile strength. is preferred the shaped part consists of up to 60 weight percent carbon fibers. are also advantageous Also metal fibers (wires), preferably copper fibers (wires).

In a preferred embodiment a fabric is pressed into the molded part, which in warp or weft direction carbon fibers and / or metal fibers (wires), preferably Copper fibers (wires) that. The pressing of the fabric takes place z. B. after in EP 0531840 B1 specified method. The thickness and / or length of the fibers is selected depending on the required antenna tuning. Expediently are carbon fibers and / or metal fibers (wires) in the tissue with Spaced from each other. A distance of 5 mm has proved in experiments proved advantageous. After contacting to good reception qualities showed in Radio.

In particular embodiment, the fibers or the fabric with cured are UP or vinyl ester resin coated. This can not be damaged or shift the fiber strands during the further processing to the SMC molding effected.

Particularly advantageously allows the moldings described with the integrated Arrange antenna or the antenna on a vehicle, eg. as the trunk lid or in or on the bumper.

When transmitting antennas to protect z. B. the vehicle occupant is preferably in motor vehicles an additional metal shield is integrated in the molded part. These Metal shield is advantageously a vapor-coated with aluminum synthetic Fiber fabric or fleece.

The introduction of the antenna in the molding can as described by the interweaving the electrically conductive fibers or wires in warp or weft direction in the Tissue occur. It can also be by sewing (z. B. zigzag stitch) or Sticking to the tissue occur.

Further features of the invention will be apparent from the figures, the described are. It shows:<dl tsize="8"><dt>Fig. 1</dt><dd>a carbon fiber laminate,</dd><dt>Fig. 2A</dt><dd>a plan view of a woven fabric having carbon fiber rovings,</dd><dt>FIG. 2b</dt><dd>a plan view of a pre-treated fabric with carbon fiber rovings,</dd><dt>Fig. 3a</dt><dd>a woven fabric having carbon fiber rovings similar to FIG. 2b,</dd><dt>FIG. 3b</dt><dd>deforms the fabric of Fig. 3a and cured, and</dd><dt>FIG. 3c</dt><dd>the fabric of Fig. 3b with SMC pressed,</dd><dt>Fig. 4</dt><dd>pressed-receiving antennas in the primary molding (Fig. 4a) and in the secondary molding (Fig. 4b), and</dd><dt>Fig. 5</dt><dd>pressed-transmitting antennas in the primary molding (Fig. 5a) and the secondary molding (Fig. 5b).</dd></dl>

Fig. 1 shows a plan view of a carbon fiber laminate, which forms a mold part 4. The individual carbon fibers 1 are arranged in parallel in a distance of about 5 mm. If these carbon fibers contacted 1, can be formed from them an antenna.

Fig. 2a shows a woven fabric of carbon fibers 1 with glass fibers 2. The carbon fibers 1 are in each case an optical fiber 2 positioned adjacent and vice versa, wherein the fibers are arranged parallel to and spaced from each other. FIG. 2b shows a tissue, such as FIG. 2a only the tissue is pre-treated here in addition, so that the crossing points 5 are fixed. In Fig. 2b, a fixed point of intersection 5 is exemplary highlighted. This fabric is coated with hardened up or vinyl ester resin. In this way, the dimensional stability is reached.

FIG. 3a shows a fabric 4 with carbon fibers 1. The fabric is in this case as shown in Fig. 2b pretreated. FIG. 3b shows this fabric is deformed and hardened. In Fig. 3c, this Fabric 4 with SMC 6 pressed into a molded part 3rd The carbon fibers 1 in this Moldings can then be used as antennas.

FIG. 4a, b show pressed-receiving antennas in the primary mold portion 3a (Fig. 4a) and in the secondary molding 3b (Fig. 4b). The antenna is marked with the reference numeral 7th

Fig. 5a, b show a similar arrangement, but for transmitting antennas. Here is additional even a metal evaporated (preferably aluminized) tissue 8 to Shielding provided. The figures show only schematically the arrangement of Antenna 7 in a Curved. 3