Method for Producing a Sensor with Seamless Extrusion Coating of a Sensor Element

A method for producing a sensor with seamless extrusion coating of a sensor element and a sensor produced by said method. The sensor element is enclosed in as sealed a manner as possible by the extrusion mass, thus permanently preventing the ingress of water, acids, oils or other aggressive material...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	CHRISTOV NEDELCO, SLAVIK ROSTISLAV
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS BASIC ELECTRIC ELEMENTS ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE PERFORMING OPERATIONS PHYSICS SEMICONDUCTOR DEVICES SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TARIFF METERING APPARATUS TESTING THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A method for producing a sensor with seamless extrusion coating of a sensor element and a sensor produced by said method. The sensor element is enclosed in as sealed a manner as possible by the extrusion mass, thus permanently preventing the ingress of water, acids, oils or other aggressive materials to the region of the sensor. The method includes inserting the sensor element into a mould cavity, mechanically fixing the sensor element in the mould cavity by at least one movable fixing element that engages the sensor with the mould cavity in a second region of the mould cavity, injection of an extrusion mass into the mould cavity, waiting until the extrusion mass has hardened in a first region of the mould cavity to fix the sensor element in position, removal of the moving fixing element, before the extrusion mass in the second region hardens, such that the still liquid extrusion mass at least partly fills the cavity left in the mould cavity by the removed fixing element.