DE2826308C2 - Method for producing electrical components, in particular capacitors - Google Patents

Description

35

The invention relates to a method for producing electrical components, in particular capacitors, in which the individual elements form a protective cover after contact has been made prefabricated housing part are introduced, which is completed with liquid plastic for the protective cover is, the housing parts in chained form of a station for inserting the individual elements are fed and the chained housing parts after the insertion of the individual elements only after completion all also the completion of the housing by the subsequent operations including the liquid plastic separated from each other.

Such a method is known from US Pat. No. 3,221,089. In this known method, the in Chained form present housing parts, which in the case of cylindrical wound capacitors from half-shells exist, placed in a mold after equipping with the capacitors. The housing parts position the individual capacitors in the mold. When introducing casting material into the casting mold all cavities still present in the mold are filled, and the housing parts are also melted and a connection between the casting material and these housing parts is created so that after cooling, capacitors are present, which are surrounded by a uniform housing. This well-known Method is particular because of the laborious nature of creating the housing for the individual Elements poorly suited for automatic production.

It is known from DE-Gbm 19 05 600. Small capacitors, in particular tantalum capacitors to be surrounded by dipping with an insulating compound, which the Condenser encloses moisture-proof. This insulating compound applied by immersion can also be made from consist of several layers. To in connection with the adhesion of the insulating compound to the capacitor body To reduce the problems that arise, the connecting wires on the capacitor must be specially arranged and be trained.

From DE-AS 21 14 075 it is also known, the individual solid electrolytic capacitors with connection elements to contact, soft designed as stamped parts and connected to a main carrier strip are. After contact has been made, they are still connected to the carrier strip via their connection elements connected individual capacitors immersed in a synthetic resin melt around each element with a Surrounding plastic insulation. This is also the case with this method of manufacturing capacitor elements the connection elements must be specially designed and shaped to prevent annoying cast resin cans from collapsing the plastic casing and thus inadequate insulation. But above all is with this one known method disadvantageous that an efficient automatic production with the previously known wrapping compounds can hardly be achieved, as a continuous mode of operation because of the normally required two immersion processes with intermediate hardening cannot be achieved.

From DE-OS 15 89 794 a method for producing known from tantalum capacitors, with two different types of capacitor components, namely on the one hand connecting wires bent at right angles at their ends and on the other hand the sintered bodies chained to two carriers, namely attached to an adhesive tape and a guide wire and chained them Capacitor components are then put together. After welding or soldering the connecting wires with the capacitors is attached to the capacitors in a further processing operation A protective cover is applied, which is preferably done by immersion in a liquid synthetic resin filled trough happens. This means that all disadvantages have to be accepted with this method as well, which have already been explained in connection with immersion procedures.

The object of the invention is to design the method of the type mentioned in such a way that it is problem-free and economical automatic production enables and at the same time an exact position of the connecting wires is guaranteed and the finished capacitor always has exact dimensions.

This object is achieved according to the invention in that both the tantalum capacitors with one-sided Leading out connecting wires existing individual elements as well as these tantalum capacitors receiving prefabricated housing cups in the form of positively driven chains fed to the insertion station The prefabricated housing cups are chained to one another without a carrier.

The carrier-free chaining of the housing cups in connection with the positive guidance of both chains as well after the potting of the cup it enables the desired adherence to exact dimensions and the exact position of the connection elements with automatic installation of the cor.densator elements in the cup housing to ensure.

Preferably, the introduction of the tantalum

capacitors into the prefabricated housing cups a nesting of chain sections made.

At least the housing cup chain is expediently unwound from a supply roll.

The invention is explained below on the basis of exemplary embodiments with reference to the drawing explained in more detail; shows in the drawing

1 shows different views of a first embodiment a housing cup chain suitable for use in the method according to the invention,

F i g. 2 of FIG. 1 corresponding views of another Embodiment of a housing cup chain,

F i g. 3 a schematic representation of a housing cup chain after it has been brought together with chained Tantalum capacitors, where round wires are used as connection elements,

F i g. <* · A schematic representation of a housing cup chain after merging with chained tantalum capacitors, with as connection elements Stamped parts are used, and

F i g. FIG. 5 shows an embodiment of a container made according to the method according to the invention in a housing cup arranged tantalum capacitor.

Fig. 1 shows a chain of cups 1, which consists of a series consists of individual cups 2, which via connecting webs; 3 are connected to each other. Own the mug Insertion slots 4 for the connection elements of the respective tantalum capacitor to be received.

The local position of the connecting webs 3, which in the illustrated embodiment in the vicinity of the upper edges the cups are arranged is not critical and can be selected according to the respective requirements will.

The in F i g. The cup chain shown in FIG. 2 differs from the cup chain according to FIG. 1 only in the form of the housing the single cup, which is preferably intended to hold tantalum capacitors with radial connections are.

In Fig. 3 is the principle of merging one Cup chain with contacted tantalum capacitors 5 shown, which via their connection elements 6 with carrier strips 7 are connected. It can be seen that the increments of the cup chain and connecting strips 7 are adapted to each other, so that a problem-free! is ensured by the cup chain and tintal capacitors. In the embodiment according to FIG. 2 connection elements in the form of round wires are used. The individual cups are specially designed for polarity marking and are also curved Side wall 8 provided.

FIG. 4 shows a process stage corresponding to FIG. 3 shown, wherein punched parts 9 are used as connecting elements in this embodiment, the are still in connection with the associated carrier strip 7. This carrier strip 7 has transport holes 10 provided.

The use of stamped connection elements has several advantages, especially in the Lower manufacturing costs and better suitability for the automated process can be seen, as these Punching elements provide relatively high stability and accuracy and, if necessary, immediate processing of tape material is possible.

In Fig. 5 shows an example of a tantalum capacitor manufactured according to the invention, which has a cuboid housing 7 and radial connection elements 14. The separating markings 11 originating from the connecting bars are indicated.

In comparison to previously known manufacturing processes for such components, the invention makes the Complex pre-casting magazines and centering combs previously required are superfluous, and it becomes a efficient cast resin potting made possible by multiple potting devices.

For this purpose 2 sheets of drawings

Claims (3)

Patent claims: 1. A method for producing electrical components, in particular capacitors, at which, after contact has been made, the individual elements in a prefabricated one that forms a protective cover Housing part are introduced, which completes the protective cover with liquid plastic is, the housing parts in chained form of a station for inserting the individual elements are supplied and the chained housing parts after the insertion of the individual elements only after completion of all the completion of the housing with the liquid plastic including subsequent operations are separated from each other, characterized in that that both the tantalum capacitors with lead-out leads on one side Individual elements as well as the prefabricated housing cups accommodating these tantalum capacitors in Form of positively driven chains are fed to the insertion station, the prefabricated housing cups are chained to one another without a carrier. 2. The method according to claim 1, characterized in that that the introduction of the tantalum capacitors into the prefabricated Gehäjsebecher through a Interlocking chain sections is made. 3. The method according to claim 1 or 2, characterized in that at least the housing cup chain is unwound from a supply roll.