US20050051435A1 - Method of coating the inner wall surface of a hollow body and a hollow bodycoated thereby - Google Patents

Method of coating the inner wall surface of a hollow body and a hollow bodycoated thereby Download PDF

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Publication number
US20050051435A1
US20050051435A1 US10/866,950 US86695004A US2005051435A1 US 20050051435 A1 US20050051435 A1 US 20050051435A1 US 86695004 A US86695004 A US 86695004A US 2005051435 A1 US2005051435 A1 US 2005051435A1
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US
United States
Prior art keywords
pin holder
wall surface
pin
coating
wall
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.)
Abandoned
Application number
US10/866,950
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English (en)
Inventor
Bartholomaus Forster
Thomas Fink
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.)
Schott AG
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to SCHOTT GLAS reassignment SCHOTT GLAS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FINK, THOMAS, FORSTER, BARTHOLOMAUS
Publication of US20050051435A1 publication Critical patent/US20050051435A1/en
Assigned to SCHOTT AG reassignment SCHOTT AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHOTT GLAS
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/103—Mounting initiator heads in initiators; Sealing-plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/11—Initiators therefor characterised by the material used, e.g. for initiator case or electric leads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/195—Manufacture
    • F42B3/198—Manufacture of electric initiator heads e.g., testing, machines

Definitions

  • the present invention relates to a method of coating the inner wall surface of a hollow body, the one end side of which is open and comprises there a perimeter edge.
  • Such hollow bodies are part of an electrical igniter unit for igniting fuels.
  • the fuels may be solid, liquid or gaseous.
  • the essential components of such an igniter unit are at least one igniter pin made of an electrically conductive material, a pin holder comprising a metal ring, that is oversized relative to the igniter pin so as to define, together with said igniter pin, an annular gap as well as an electrically isolating filling material provided within said annular gap.
  • At the one end of the pin holder there is a sealing cap for receiving the fuel (the igniting means).
  • At the other end of the pin holder there is a plug that is connected to the pin holder in any suitable manner and into which the igniter pin engages during operating, thus establishing an electrically conductive connection.
  • the whole unit is housed in a housing.
  • the pin holder generally consists of an isolating material such as glass, a plastic, ceramic or glass ceramic material. If the isolating filling material is glass, it has to be sealed to the metal to form a vacuum-tight assembly.
  • Such type ignition units are widely used in the electronics industry and in electrical engineering.
  • the glass used for sealing hereby serves as an insulator.
  • Typical glass-to-metal feedthrough devices have the following structure: metallic inner conductors are sealed within a sintered glass preform, said sintered glass perform being sealed to an outer metal part.
  • the ignition units mentioned are used for airbags or for belt tighteners in automotive vehicles.
  • the glass-to-metal feedthrough plays an important part therein. It is necessary that the isolated electric voltage generated by one or two metallic pins be reliably provided to a housing.
  • Known glass-to-metal feedthroughs are realized in the following manner: a pin, which is sealed within glass or isolated, and an additional conductor, which serves as the ground wire, usually are welded or soldered. They thus establish the required connection to the metallic housing.
  • This embodiment is very complicated and expensive to manufacture.
  • a major disadvantage is that the body contact to the outer housing is not very stable. This may have serious consequences, more specifically with regard to their use in air bags or belt tighteners as mentioned herein above by way of example.
  • All of the igniter units mentioned comprise two metal pins.
  • the present invention is mainly directed to electrical igniter units comprising but one single pin.
  • igniter units described herein above cause serious problems which are, that the transitions between the conductive parts have a relatively high resistance.
  • Another disadvantage of known igniter units is their short durable life.
  • the operational life of known igniter units is unsatisfactory. In part at least, this is due to corrosion of the components involved.
  • a coating of a material the electrical resistance of which is low is applied in the transition zone.
  • a suited material is gold, for example.
  • Gold is electrolytically deposited onto the inner surface of the hollow body serving as the pin holder and likewise onto the metal pin protruding beyond its glass mount. This avoids corrosion in the transition zone between the pin holder and plug.
  • free gold particles have been found wandering around outside of the coating. These wandering particles disturb the sensitive system pin holder/plug and compromise the operation of the igniter unit.
  • the gold particles mentioned have been defined as having been rubbed off and attempts have been made to improve the bonding performance of the coating by changing the operational parameters of electrolytic deposition. This was not successful, though.
  • the invention provides a method by which the inner side of a cylindrical hollow body—more specifically of a pin holder of an igniter unit—can be reliably and durably coated and by which particles will not detach from the coating.
  • a hollow body of the desired type is defined in claim 8 .
  • the screened and, as a result thereof, coating-free region is very small in the axial direction of the hollow body.
  • the pin holders required for igniter units a few millimeters or even a few tenths of a millimeter will suffice.
  • this region remains free from coating with the adjoined region, which can extend as far as the glass filling the gap, being provided with a coating that has a substantially uniform thickness and is suited for operation of the igniter unit.
  • cylindrical hollow body includes hollow bodies having a circular cross-section but also such having other cross-sections such as square cross-sections with rounded corners. Also, the cross-section of the hollow body needs not be constant over its length. On the contrary, a relatively wide diameter circular cylinder may be adjoined with a relatively small diameter circular cylinder.
  • FIG. 1 shows a pin holder for an igniter unit
  • FIG. 2 shows equipment for carrying out the method, in accordance with one form of the invention.
  • the pin holder 1 illustrated in FIG. 1 is part of an igniter unit used in a belt tightener.
  • a sealing cap 2 is used for receiving a fuel, which is shown in a sectional view only, is connected to the pin holder 1 .
  • a plug (not shown) is connected to the end of the pin holder 1 that is confronting the sealing cap 2 .
  • the most important component of the pin holder 1 is a metal pin 3 . It is embedded in an isolating filling material 4 , which is made of glass, in the instant case.
  • the pin holder includes a carrier portion 1 . 1 for receiving the metal pin 3 as well as a sleeve 1 . 2 with an inner wall surface 1 . 2 . 1 .
  • the end of the fused portion of the metal pin 3 is electrically conductively connected to the carrier portion 1 . 1 by means of a bridge 5 .
  • the inner wall surface 1 . 2 . 1 of the sleeve 1 . 2 and the free end of the metal pin 3 are coated.
  • the material used for the coating is gold.
  • the inner wall surface 1 . 2 . 1 will not be coated all over. A certain region will remain bare, said region beginning at the free perimeter edge 1 . 3 of the sleeve 1 . 2 and extending approximately as far as the free end of the metal pin 3 . Variations thereof are possible. However, the very front region of the free perimeter edge 1 . 3 should remain free of coating material.
  • Pin holder 1 and metal pin 3 are in a coaxially aligned relationship having a common longitudinal axis 6 .
  • the coating is electrolytically deposited.
  • the pin holder 1 is hereby appropriately in the same position as shown herein i.e., with the free perimeter edge 1 . 3 being directed downwards.
  • the method in accordance with the invention, operates in the following manner:
  • the inner wall surface 1 . 2 . 1 is covered to the desired extent in the region of the free perimeter edge 1 . 3 , i.e., for example as far as the free tip of the metal pin 3 , or beyond, towards the isolating filling material 4 , or only so as to terminate short of the free tip of the metal pin 3 .
  • this potential is applied to the pin holder 1 , this potential generally being a direct voltage.
  • an electrolyte is applied onto the uncovered portion of the inner wall surface 1 . 2 . 1 in such a manner that the coating material of concern, which as already mentioned is gold in the instant case, is deposited.
  • Nozzles are suitably used for deposition.
  • a one-way nozzle could be used for each pin holder 1 .
  • the nozzle's end is directed toward the uncovered region of the inner wall surface 1 . 2 . 1 that is to be coated. It could for example revolve about the common longitudinal axis 6 during coating so as to cover the entire extent of the inner wall surface to be coated.
  • a kinematic inversion is also possible with the nozzle being stationary and the pin holder 1 revolving. It would also be possible to utilize two or more nozzles.
  • FIG. 2 shows equipment for depositing the gold coating mentioned onto the inner wall surface 1 . 2 . 1 . of the sleeve 1 . 2 .
  • the equipment includes a rotary table 7 , a loading and unloading station 0 and further stations 10 to 70 for cleaning, gold plating and rinsing.
  • a mask 8 see station 0 —serves to protect that region of the inner wall surface 1 . 2 . 1 that is to remain free from coating material.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Air Bags (AREA)
US10/866,950 2003-06-11 2004-06-10 Method of coating the inner wall surface of a hollow body and a hollow bodycoated thereby Abandoned US20050051435A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10326253.9 2003-06-11
DE10326253A DE10326253B3 (de) 2003-06-11 2003-06-11 Zündeinheit und Verfahren zu ihrer Herstellung

Publications (1)

Publication Number Publication Date
US20050051435A1 true US20050051435A1 (en) 2005-03-10

Family

ID=33103684

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/866,950 Abandoned US20050051435A1 (en) 2003-06-11 2004-06-10 Method of coating the inner wall surface of a hollow body and a hollow bodycoated thereby

Country Status (4)

Country Link
US (1) US20050051435A1 (enExample)
JP (1) JP4663256B2 (enExample)
DE (1) DE10326253B3 (enExample)
FR (1) FR2856139B1 (enExample)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040141279A1 (en) * 2003-01-21 2004-07-22 Takata Corporation Initiator and gas generator
US20080250963A1 (en) * 2003-03-03 2008-10-16 Schott Ag Metal fixing material bushing and method for producing a base plate of a metal fixing material bushing
US20080270126A1 (en) * 2005-10-28 2008-10-30 Electronics And Telecommunications Research Institute Apparatus for Vocal-Cord Signal Recognition and Method Thereof
US8733250B2 (en) 2006-01-27 2014-05-27 Schott Ag Metal-sealing material-feedthrough and utilization of the metal-sealing material feedthrough with an airbag, a belt tensioning device, and an ignition device
US9423218B2 (en) 2010-09-17 2016-08-23 Schott Ag Method for producing a ring-shaped or plate-like element
US10209041B2 (en) 2014-11-17 2019-02-19 Ems-Patvag s.r.o. Detonator for passenger restraint systems
US10684102B2 (en) 2010-09-17 2020-06-16 Schott Ag Method for producing a ring-shaped or plate-like element
US11578954B2 (en) * 2017-10-18 2023-02-14 Zf Airbag Germany Gmbh Igniter for a gas generator and method for producing an igniter

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014016923B3 (de) * 2014-11-17 2016-02-25 Elisabeth Dürschinger Zündkapsel für Insassen-Rückhaltesysteme
DE102015014124A1 (de) 2015-11-03 2017-05-04 Ems-Patvag s.r.o. Zündkapsel für Insassen-Rückhaltesysteme

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5621183A (en) * 1995-01-12 1997-04-15 Trw Inc. Initiator for an air bag inflator
US6274252B1 (en) * 1994-08-04 2001-08-14 Coors Ceramics Company Hermetic glass-to-metal seal useful in headers for airbags

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3291046A (en) * 1963-09-10 1966-12-13 Du Pont Electrically actuated explosive device
US3735705A (en) * 1971-07-15 1973-05-29 Amp Inc Filtered electro-explosive device
DE2904174C2 (de) * 1979-02-05 1984-01-26 Heko - Elektronik GmbH & Co KG, 2804 Lilienthal Elektrische Anzündeinheit
JPS57189474A (en) * 1981-05-19 1982-11-20 Furukawa Electric Co Ltd Method of plating inner surface of connector socket
FR2557689B1 (fr) * 1983-12-28 1987-06-12 Poudres & Explosifs Ste Nale Initiateur pyrotechnique utilisant une prise coaxiale
DE3415625A1 (de) * 1984-04-26 1985-10-31 Dynamit Nobel Ag, 5210 Troisdorf Elektrisches zuendelement mit soll-funkenstrecke
US5686691A (en) * 1995-12-22 1997-11-11 Oea, Inc. Slurry-loadable electrical initiator
JPH10251889A (ja) * 1997-03-13 1998-09-22 Sumitomo Kinzoku Electro Device:Kk 筒状部材内周面のめっき方法
DE19927233A1 (de) * 1999-06-15 2001-01-11 Schott Glas Glas-Metall-Durchführung
US6328615B1 (en) * 2000-03-02 2001-12-11 Itt Manufacturing Enterprises, Inc. Contact formed of joined pieces
JP2002283946A (ja) * 2001-03-23 2002-10-03 Takata Corp ガス発生器及びエアバッグ装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6274252B1 (en) * 1994-08-04 2001-08-14 Coors Ceramics Company Hermetic glass-to-metal seal useful in headers for airbags
US5621183A (en) * 1995-01-12 1997-04-15 Trw Inc. Initiator for an air bag inflator

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040141279A1 (en) * 2003-01-21 2004-07-22 Takata Corporation Initiator and gas generator
US20080250963A1 (en) * 2003-03-03 2008-10-16 Schott Ag Metal fixing material bushing and method for producing a base plate of a metal fixing material bushing
US20100229616A1 (en) * 2003-03-03 2010-09-16 Schott Ag Metal fixing material bushing and method for producing a base plate of a metal fixing material bushing
US8276514B2 (en) 2003-03-03 2012-10-02 Schott Ag Metal fixing material bushing and method for producing a base plate of a metal fixing material bushing
US8327765B2 (en) 2003-03-03 2012-12-11 Schott Ag Metal fixing material bushing and method for producing a base plate of a metal fixing material bushing
US20080270126A1 (en) * 2005-10-28 2008-10-30 Electronics And Telecommunications Research Institute Apparatus for Vocal-Cord Signal Recognition and Method Thereof
US8733250B2 (en) 2006-01-27 2014-05-27 Schott Ag Metal-sealing material-feedthrough and utilization of the metal-sealing material feedthrough with an airbag, a belt tensioning device, and an ignition device
US9423218B2 (en) 2010-09-17 2016-08-23 Schott Ag Method for producing a ring-shaped or plate-like element
US9651345B2 (en) 2010-09-17 2017-05-16 Schott Ag Method for producing a ring-shaped or plate-like element
US10684102B2 (en) 2010-09-17 2020-06-16 Schott Ag Method for producing a ring-shaped or plate-like element
US10209041B2 (en) 2014-11-17 2019-02-19 Ems-Patvag s.r.o. Detonator for passenger restraint systems
US11578954B2 (en) * 2017-10-18 2023-02-14 Zf Airbag Germany Gmbh Igniter for a gas generator and method for producing an igniter

Also Published As

Publication number Publication date
JP2005002474A (ja) 2005-01-06
FR2856139B1 (fr) 2006-09-08
DE10326253B3 (de) 2004-11-04
FR2856139A1 (fr) 2004-12-17
JP4663256B2 (ja) 2011-04-06

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AS Assignment

Owner name: SCHOTT GLAS, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FORSTER, BARTHOLOMAUS;FINK, THOMAS;REEL/FRAME:015745/0042;SIGNING DATES FROM 20040915 TO 20040917

AS Assignment

Owner name: SCHOTT AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCHOTT GLAS;REEL/FRAME:015766/0926

Effective date: 20050209

Owner name: SCHOTT AG,GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCHOTT GLAS;REEL/FRAME:015766/0926

Effective date: 20050209

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION