DD266720A3 - METHOD OF MANUFACTURING METAL TRANSPARENT POWERS FOR HIGH-LOADABLE ELECTRIC ACOUSTIC CONVERTERS - Google Patents

Abstract

The invention relates to a method of manufacturing voice coils with a metal winding carrier for heavy-duty electroacoustic transducer. The manufacturing process can be used wherever high thermal and mechanical requirements are placed on the transducers. The object of the invention is to develop a manufacturing method for heavy-duty Metalltraegerschwingspulen with nichtwaermeleitiden Verstaerkungsstreifen that manages for the junction winding carrier / reinforcing strips without wet adhesion. The solution according to the invention consists in that the connection takes place by means of a seal under the action of pressure and temperature, wherein previously the reinforcing strip was adapted by perforation in its expansion behavior to the thermal elongation coefficient of the metal winding. Fig. 1

Description

Field of application of the invention

The invention relates to a method of manufacturing voice coils with a metal winding support for heavy-duty electroacoustic transducer, which takes place to increase the mechanical skill of the voice coil by Aufsiegeiung olnos non-heat-conducting reinforcing strip with perforation in the range of Schwingspulenhalsos. The invention can be applied everywhere where high demands are placed on the mechanical and thermal stability resulting from the corresponding power class of the loudspeaker (eg loudspeakers of the music electronics, loudspeakers for hi-fi boxes).

Characteristic of the known technical solutions Voice coils for electroacoustic transducers consist of the voice coil winding, usually on a trogenden Winding support is applied, which also acts as a connecting element to the membrane. Depending on the power class of the loudspeaker, the winding carrier is used as a paper, plastic film or Metal winding carrier carried out, the woboi the higher performance classes a very stable voice coil construction

is required.

This sturdy construction is reinforced by use of stronger backing material or by introducing an additional

acting element, the Verstärkungsstreitens, in the region between winding and membrane achieved.

The solution with reinforcing strip has the advantage over the application of a stronger winding carrier that the

usable winding space in the air gap is not further reduced by this winding support.

In general, the same material is used for winding carriers and reinforcing struts, wherein the connection through

a splice is realized. When using metal winding carriers, the effect occurs that, although the heat well from the

Winding is removed by the winding support, but this heats up so that the connection point to the membrane

Here is heavily loaded thermally. Thus, the disadvantage of overheating is only shifted from the splice winding / winding support to the splice winding carrier / membrane. For thermal insulation of the splice point metal winding carrier /

Membrane is the introduction of Papierstrelfen known by a wet gluing on the voice coil sharks. ufgebracht

and thus gives the metal carrier voice coil a good adhesive adhering surface in the region of interest (membrane).

A disadvantage of this solution is the relatively large amount of time to produce this adhesive bond, the application of a Spezialnaßklebetoffes with sufficient thermal properties and the lack of automation of the Schwingepulenherstellung. Another disadvantage is that with a larger proportion of these carrier voice coils when using the same one Deformation takes place in the area of the voice coil neck. Object of the invention

The aim of the invention is to provide a manufacturing process for Metallträgerschwlngspulen, in which minimizes the labor cost to realize the thormic isolation of the compound metal coil carrier / membrane, avoids the use of special wet adhesives, prevents deformation of the voice coil and automatic production is to be achieved.

Essence of the invention

The invention has for its object to provide a manufacturing method for heavy-duty metal carrier voice coils having a non-heat-conducting reinforcing strip, which increases the mechanical stability of the support body and the compound winding support / membrane thermally insulated to develop, in which such a technology is to be used, the not based on wet adhesion, and accommodates the differential elongation behavior of metal winding supports and non-heat conducting reinforcing strips.

According to the invention, the object in the production of a metal carrier voice coil, consisting of a Metaüwicklungsträger with a thermally reactivatable adhesive coating, the coil winding attached thereto and

a reinforcing strip of nlchtwärmeloitendem material, achieved in that is sealed at high temperatures and untor pressure of nichtwärmeleitende Verstarkungeetrelfon in the field of the voice coil neck on the Metallwijklungsträger. In this case, the Slegeltemporatur is selected higher than the operating temperature of the vibrating coil to exclude in continuous operation, a sealing of the reinforcing strip. The heat-dissipating reinforcing strip was previously adapted by perforation In circumferential direction in its elastic elongation conditions the thermal expansion coefficient of the metal winding carrier. Deformation of the voice coil after sealing does not occur due to this mechanical pre-treatment of the reinforcing strip even during subsequent cooling.

embodiment The invention will be explained below using an exemplary embodiment. In FIG. 11st, the orifice according to the invention Verfahron produced Metallträgorschwlngspule shown. ^ The voice coil consists of the thermally reactivatable adhesive coated metal winding carrier 1, the Voice coil winding 2, the untorei landor and bonded to the metal winding carrier 'is, as well as from

nichtwärmeleitendem material reinforcing 3, which under the influence of high temperature and ..inter

Pressure was sealed in the radial direction on the voice coil neck. Making a permanent connection between the metal winding carrier and the reinforcing strip

non-heat-conducting material for thermal insulation of the splice metal coil carrier / membrane is carried out by

Sealing under the action of pressure and temperature. The bending of the reinforcing stroncone must be carried out at temperatures higher. as the operating temperature

(Elnsatztau tauirir) of the voice coil (a below the operating temperature Siegeiung would lead to the replacement of the Veretärioingsstreifens), this has the consequence that the metal winding carrier expands, while the directional heat-conducting reinforcing strip does not bositzt this thermally induced change in length.

By mechanical processing of the pre-reinforcement strip, a perforation of the reinforcing strip in circumferential Direction, this deficiency is remedied and the reinforcing trophon is dom in soinom elastic strain behavior

Longitudinal thermal expansion coefficients of the Metallwlcklungstrßgers adapted. By this mechanical

Pre-treatment of the reinforcing strip is a deformation of the voice coil after sealing

prevents corresponding cooling

By using this manufacturing method, it is possible to automatically manufacture metal carrier coils

perform.

Claims (1)

Method of producing metal carrier winding coils for heavy-duty electroacoustic transducers consisting of a metal winding support with irreversibly reactable adhesive coating, the coil winding and a reinforcing strip of non-heat conducting material, characterized in that the connection of the metal substrate to the reinforcing strip of non-heat conducting material is sealed by pressure and temperature sealing, which is above the operating temperature of the voice coil, takes place, wherein previously the reinforcing strip has been adapted by perforation in the circumferential direction in its elastic elongation behavior of the thermal expansion coefficient of the metal winding carrier. For this 1 page drawing