DE902394C - Process for the production of coils with a small conductor cross section for high frequency devices - Google Patents

Description

In the case of coils for high-frequency devices, it is often useful to use the conductor not, as is generally the case, to be attached to the outside of the support body, but on the inside. You can do this with the support body with appropriate grooves and the like. and insert the conductor into this and glue it through webs or the like. attach. However, this type of construction requires relatively stiff conductors large cross-section. The construction therefore generally becomes quite extensive and unwieldy.

The invention is concerned with using such coils as well to manufacture very thin conductors. She solves the problem in that the, head in Kunstharzpreßmaterial od. The like. Is pressed.

The idea of the invention is initially based on a few in the following exemplified figures explained in more detail. It is believed that the task consists in creating a short-circuit ring for a goniometer, the short-circuit ring to avoid eddy current losses from a plurality of parallel-connected Ladders.

Fig. I shows one made of thin copper sheet. z. B. o, o2 mm produced Short-circuit ring. The short-circuit ring consists of three turns connected in parallel i to 3. It is cut from a piece of sheet metal in such a way that the three individual conductors on the edge of the sheet are still held together by narrow webs .4: the sheet is then Cylindrical shape granted, so that it has the appearance shown in Fig. I.

A cylinder body is then made from a suitable synthetic resin material, as shown in Fig. 2. The inside diameter of this cylinder body is slightly larger than the outside diameter of the cylinder in Fig. i or slightly larger like the finished piece. This cylinder is pressed at a low temperature, see above that the synthetic resin has not yet passed into the final state that it normally would after pressing at high temperature and high pressure.

Fig.3 shows a variant of the cylinder according to Fig. 2. It is on one Slotted place. The synthetic resin body and the metal body «-ground in one combined in a single operation. For this purpose a mold is used, as shown in Fig. 4. The metal body is first placed on a mandrel 6 pushed on, over it comes the synthetic resin body 7. The mold is otherwise from four jaws 8, which grip from the outside around the mandrel, metal body and synthetic resin jacket. The whole arrangement is now heated as usual and from the outside by pressing together the jaws pressed. The mandrel holds the inside diameter.

In this way, it is possible to create coil arrangements with internal Manufacture winding using very thin conductors and the like. Manufacture service The body is shown in Fig. 5, a section in Fig. 6.

The idea of the invention, which was given above with reference to a certain arrangement has been explained, can of course with appropriate modification can also be used to create other arrangements.

Claims (2)

PATENT CLAIMS: i. Method of making coils with small Conductor cross-section for high-frequency devices, characterized in that the conductor is pressed in on the inside of the support body. 2. Method of manufacture of bodies according to claim i, characterized by the following manufacturing steps: a) the conductor is brought into the final or approximately final shape; b) the support body is made of molded synthetic resin material with a larger inner diameter than the final pre-pressed, using a low pressing temperature and pressure; c) the conductor produced according to a) and the pre-pressed support body according to b) are nested and pressed together using high temperature and pressure.