Electronic device for automation technology with a double plastic-coated electronic circuit board and a manufacturing method
The electronic device with annular grooves and sealing elements in its cable plug ensures a sealed cable outlet and prevents damage, addressing production challenges with a simplified, single-tool injection molding process for various cable diameters.
Patent Information
- Application Number
- DE102024102780
- Authority / Receiving Office
- DE · DE
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-07-31
AI Technical Summary
Existing electronic devices in automation technology face challenges in providing a reliably sealed cable outlet while preventing component damage during production, and require complex assembly processes for connecting cables.
An electronic device with an electronic board embedded in a second plastic injection-molded part, partially encapsulated by a third part, featuring a cable plug with annular grooves and sealing elements, allowing for a defined mounting and sealing of the connection cable, and a single injection molding tool for various cable diameters.
The solution provides a reliable sealed cable outlet, prevents damage to connection cables, and simplifies the production process by using a single injection molding tool for different cable diameters, eliminating the need for replaceable sealing strips.
Smart Images
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Abstract
Claims
[1] Electronic device of automation technology with an electronic circuit board (EP) which is embedded in a second plastic injection-molded part (T2) which is produced in a second injection-mold process and is at least partially encased by a third plastic injection-molded part (T3) which is produced in a third injection-mold process, characterized byin that the electronic circuit board (EP) is connected to a connecting cable (20) which has an injection-molded cable plug (26) as a first plastic injection-molded part (T1) on an outer wall (22), which is produced in a first injection-molding process in order to form a cable outlet (24) for the electronic device (10), wherein the cable plug (26) has a first annular groove (30a) with a sealing element (34), which is enveloped by the second plastic injection-molded part (T2) and seals the electronic circuit board (EP), wherein the cable plug (26) has a second annular groove (30b) for aligning the connecting cable (20) in the second injection-molding process, which second annular groove is enveloped by the third plastic injection-molded part (T3) in the third injection-molding process. [2] Electronic device according to claim 1, characterized byin that the first and second annular grooves (30a,b) are arranged next to one another along a longitudinal axis (L) of the connecting cable (20), the second annular groove (30b) having an enlarged outer diameter in order to form a radially projecting sealing surface (36) for the first injection molding process. [3] Electronic device according to claim 1 or 2, characterized by that adjacent to the second annular groove (30b) the cable plug (26) has a support surface (38) for an injection molding tool (40) in the third injection molding process, wherein the support surface (38) with the second annular groove (30b) forms a radial shoulder (42) to a longitudinal axis (L) of the connecting cable (20), which is overmolded with the third plastic injection molded part (T3). [4] Method for producing a double plastic-coated electronic device (10) with a cable outlet (24) for a connecting cable (20) of an electronic circuit board (EP), in particular an electronic device according to one of claims 1 to 3, comprising the following steps: - overmolding an outer wall (22) of the connecting cable (20) with a cable plug (26) which forms a first plastic injection-molded part (T1), - placing the connecting cable (20) with the connected electronic board (EP) in an injection molding tool (40) which grips the cable plug (26) for alignment in a second annular groove (30b), - overmolding the electronic circuit board (EP) and a first annular groove (30a) with sealing element (34) with a second plastic injection-molded part (T2), - Overmolding the second plastic injection-molded part (T2) and the second annular groove (30b) with a third plastic injection-molded part (T3).
Citation Information
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