EP0058757A1 - Procédé d'étanchement d'un élément électrique, en particulier d'un relais - Google Patents

Procédé d'étanchement d'un élément électrique, en particulier d'un relais Download PDF

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Publication number
EP0058757A1
EP0058757A1 EP81109139A EP81109139A EP0058757A1 EP 0058757 A1 EP0058757 A1 EP 0058757A1 EP 81109139 A EP81109139 A EP 81109139A EP 81109139 A EP81109139 A EP 81109139A EP 0058757 A1 EP0058757 A1 EP 0058757A1
Authority
EP
European Patent Office
Prior art keywords
fleece
stamp
housing
casting resin
solvent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP81109139A
Other languages
German (de)
English (en)
Other versions
EP0058757B1 (fr
Inventor
Cornelia Dipl.-Phys. Albert
Ulf Dipl.-Phys. Rauterberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT81109139T priority Critical patent/ATE9190T1/de
Publication of EP0058757A1 publication Critical patent/EP0058757A1/fr
Application granted granted Critical
Publication of EP0058757B1 publication Critical patent/EP0058757B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/023—Details concerning sealing, e.g. sealing casing with resin
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings

Definitions

  • the invention relates to a method for sealing an electrical component, in particular a relay, with a housing having individual openings or joints, with a fleece, i.e. a layer of fabric with high capillary absorbency, placed over the housing openings to be sealed and then impregnated with a thin, curable cast resin.
  • a fleece i.e. a layer of fabric with high capillary absorbency
  • Such a method is known from DE-AS 26 16 299 '. It is mainly used to seal the housing openings for connecting pins and the housing joints between a base and a protective cap. With the use of the fleece, it is possible to distribute a small amount of casting resin well over the entire surface and, in particular, to introduce it to the housing openings without contaminating the protruding connecting pins and without significantly increasing the overall height of a relay or a similar component.
  • the object of the present invention is to further develop the method of the type mentioned at the outset such that the applied nonwoven fits well at all points on the component surface and thereby ensures an even distribution of resin and sealing, without additional parts such as magazines and pressure frames being temporarily connected to the component and require additional operations.
  • this object is achieved in that the fleece is pressed onto the component immediately before the casting resin is applied using a heated stamp which is adapted to the component surface.
  • the fleece according to the invention By pressing the fleece according to the invention with a heated stamp, it is ensured that the fleece is smoothed before the resin is applied. This resin results in a good and tight connection to the component surface at all points; the fleece retains a smooth surface even after curing.
  • the stamp for pressing the fleece is an additional device in production. However, it means much less effort than the method of first putting the relays in a magazine, fitting them with cover frames and these cover frames, which are used for the production output of the whole Hardening time must be available, later to be released from the relays and ready for a new use.
  • the printout stamp used according to the invention can easily be integrated into an automated production line.
  • the temperature of the stamp is selected as a function of the material of the fleece in such a way that the fleece is only smoothed out by briefly pressing it on.
  • conventional nonwovens such as rayon or polyester fibers
  • temperatures of around 200 ° C. are selected.
  • this method can also use nonwovens, such as polyester, which could not be used because of their tendency to form waves.
  • thermoplastic housing material so that the housing surface is melted and glued to the fleece.
  • temperatures of around 240 ° C are selected.
  • the fleece covers larger free areas, it can also be expedient to provide the fleece with slots from the edge in order to prevent the fleece from being lifted off in any case.
  • the fleece is soaked with a small amount of a solvent attacking the housing material before the stamp is pressed on.
  • the surface of the housing is slightly loosened and glued to the fleece when the stamp is pressed on. It may be sufficient to apply the solvent only in a few places, preferably in the edge region of the housing.
  • the capillary action of the fleece is used for the distribution of the solvent before the casting resin is introduced.
  • the solvent can be applied to the fleece, for example, through openings in the stamp.
  • the main advantage of this method is that the temperature of the stamp is considerably lower than that of the above methods can be chosen; for example, a stamp temperature of approx. 40 ° C. is sufficient. This is important in the case of very thin-walled housings which could warp at high stamp temperatures.
  • the solvent can be applied directly to the fleece through openings in the stamp, for example. This largely avoids the occurrence of harmful solvent vapors.
  • the usual solvents are used, such as trichlorethylene, perchlorethylene, acetone or methylene chloride.
  • the flow of the casting resin from a filling point to distant housing edges can be improved by additional grooves in the housing surface. This can be of advantage in the case of large housing surfaces to be sealed, in which the casting resin then reaches the removed edges from a filling point via individual channels below the fleece and is distributed over the entire surface from the ducts through the fleece.
  • a component 1 for example a relay, is shown with a housing cap 2 (partially cut) and a base 3, through which connecting pins 4 are guided to the outside.
  • the housing thus has joints 5 between the housing cap 2 and the base 3 and openings 6 in the base for the connections 4, which are to be sealed together with a fleece 7 and with casting resin.
  • the component 1 is conveyed on a transport frame 8 under a heated stamp 9, which is briefly pressed vertically onto the fleece.
  • This stamp 9 is precisely adapted to the component surface. It thus has, for example, recesses 10 for the connecting pins 4. Any gradations of the component surface which are not shown here are also taken into account by adapting the stamp surface accordingly, so that the fleece 7 is pressed evenly onto the component surface and smoothed by the heated stamp.
  • the temperature of the stamp can be chosen so that the component surface is melted slightly and glued to the fleece. It could be sufficient that, for example, only the edge of the cap 2 is glued all round to the fleece 7.
  • the component 1 has a cap 2 and a base 3, the housing openings of which are covered with a fleece 7.
  • a heated stamp 11 is used to press the fleece, which additionally has a channel system 12 with openings 13 to the pressure side.
  • a supply hose 14 can be used to apply a small amount of solvent to the fleece 7 in order to easily dissolve the surface of the component and to glue it to the fleece 7. The solvent can be introduced shortly before or while the stamp is pressed firmly onto the fleece.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cable Accessories (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Contacts (AREA)
  • Insulating Bodies (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Motor Or Generator Frames (AREA)
  • Casings For Electric Apparatus (AREA)
EP81109139A 1981-02-20 1981-10-28 Procédé d'étanchement d'un élément électrique, en particulier d'un relais Expired EP0058757B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81109139T ATE9190T1 (de) 1981-02-20 1981-10-28 Verfahren zur abdichtung eines elektrischen bauelementes, insbesondere eines relais.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3106371 1981-02-20
DE19813106371 DE3106371A1 (de) 1981-02-20 1981-02-20 Verfahren zur abdichtung eines elektrischen bauelementes, insbesondere eines relais

Publications (2)

Publication Number Publication Date
EP0058757A1 true EP0058757A1 (fr) 1982-09-01
EP0058757B1 EP0058757B1 (fr) 1984-08-29

Family

ID=6125374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109139A Expired EP0058757B1 (fr) 1981-02-20 1981-10-28 Procédé d'étanchement d'un élément électrique, en particulier d'un relais

Country Status (7)

Country Link
US (1) US4427612A (fr)
EP (1) EP0058757B1 (fr)
JP (1) JPS57152632A (fr)
AT (1) ATE9190T1 (fr)
BR (1) BR8200921A (fr)
DE (2) DE3106371A1 (fr)
PT (1) PT74465B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0351547A2 (fr) * 1988-07-20 1990-01-24 Trw Inc. Assemblage d'un relais étanche
EP0597279A1 (fr) * 1992-11-07 1994-05-18 METEOR GUMMIWERKE K.H. BÄDJE GMBH & CO. Bordure de sécurité avec bandes de contact

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2216752A1 (fr) * 1973-02-02 1974-08-30 Toko Inc
DE2616299B1 (de) * 1976-04-13 1977-09-15 Siemens Ag Waschdichte Schutzvorrichtung fuer ein elektromechanisches Bauelement und Verfahren zu dessen Abdichtung
DE2618492A1 (de) * 1976-04-27 1977-11-10 Siemens Ag Schutzvorrichtung fuer ein elektromechanisches bauelement
DE2710211A1 (de) * 1977-03-09 1978-09-14 Licentia Gmbh Verfahren zur herstellung von vergossenen elektrischen schaltungen mit zugaenglichen bauteilen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2216752A1 (fr) * 1973-02-02 1974-08-30 Toko Inc
DE2616299B1 (de) * 1976-04-13 1977-09-15 Siemens Ag Waschdichte Schutzvorrichtung fuer ein elektromechanisches Bauelement und Verfahren zu dessen Abdichtung
DE2618492A1 (de) * 1976-04-27 1977-11-10 Siemens Ag Schutzvorrichtung fuer ein elektromechanisches bauelement
DE2710211A1 (de) * 1977-03-09 1978-09-14 Licentia Gmbh Verfahren zur herstellung von vergossenen elektrischen schaltungen mit zugaenglichen bauteilen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0351547A2 (fr) * 1988-07-20 1990-01-24 Trw Inc. Assemblage d'un relais étanche
EP0351547A3 (fr) * 1988-07-20 1990-12-19 Trw Inc. Assemblage d'un relais étanche
EP0597279A1 (fr) * 1992-11-07 1994-05-18 METEOR GUMMIWERKE K.H. BÄDJE GMBH & CO. Bordure de sécurité avec bandes de contact

Also Published As

Publication number Publication date
PT74465B (de) 1983-08-19
US4427612A (en) 1984-01-24
EP0058757B1 (fr) 1984-08-29
ATE9190T1 (de) 1984-09-15
PT74465A (de) 1982-03-01
DE3106371A1 (de) 1982-09-09
DE3165792D1 (en) 1984-10-04
BR8200921A (pt) 1982-12-28
JPS57152632A (en) 1982-09-21

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