JP4206009B2 - Inflator igniter and manufacturing method thereof - Google Patents

Inflator igniter and manufacturing method thereof Download PDF

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Publication number
JP4206009B2
JP4206009B2 JP2003302679A JP2003302679A JP4206009B2 JP 4206009 B2 JP4206009 B2 JP 4206009B2 JP 2003302679 A JP2003302679 A JP 2003302679A JP 2003302679 A JP2003302679 A JP 2003302679A JP 4206009 B2 JP4206009 B2 JP 4206009B2
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pyrotechnic material
material slurry
slurry
component
igniter
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JP2004115001A (en
Inventor
博 原田
愼吾 小田
元 木之下
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ダイセル化学工業株式会社
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Priority to JP2003302679A priority patent/JP4206009B2/en
Priority claimed from US10/652,238 external-priority patent/US6976430B2/en
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    • CCHEMISTRY; METALLURGY
    • C06EXPLOSIVES; MATCHES
    • C06CDETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
    • C06C9/00Chemical contact igniters; Chemical lighters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42BEXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00Blasting cartridges, i.e. case and explosive
    • F42B3/10Initiators therefor
    • F42B3/12Bridge initiators
    • F42B3/121Initiators with incorporated integrated circuit
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42BEXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00Blasting cartridges, i.e. case and explosive
    • F42B3/10Initiators therefor
    • F42B3/12Bridge initiators
    • F42B3/128Bridge initiators characterised by the composition of the pyrotechnic material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42BEXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00Blasting cartridges, i.e. case and explosive
    • F42B3/10Initiators therefor
    • F42B3/195Manufacture

Description

  The present invention relates to an igniter suitably used for an inflator for an air bag, and a method for manufacturing the igniter, and particularly has a feature in a method for filling a pyrotechnic material (or igniting agent) that burns during operation and generates a flame or the like. The present invention relates to an inflator igniter and a manufacturing method thereof.

  Conventionally, an inflator for an airbag uses an igniter as an initiating device, and in recent years, an electrical operation signal is received and converted into thermal energy to ignite and burn a pyrotechnic material. So-called electric igniters have become mainstream.

  The electric igniter typically includes a pair of conductive pins that receive an electrical activation signal, an electrical resistance wire that is electrically connected between the conductive pins, and a contact with the electrical resistance wire. A pyrotechnic material provided (i.e., igniting agent), and when the conductive pin receives an activation signal and current flows through the electrical resistance wire, the resistance wire heats up and the pyrotechnic material Is supposed to ignite.

  And since this electric igniter plays a role for starting the operation of the inflator for an air bag, it is important that the electric igniter operates reliably when necessary. Regarding this operational certainty, Japanese Patent Application Laid-Open No. 9-210596 discloses that an appropriate connection between the bridging wire and the pyrotechnic material is an important factor for the performance of the electric detonator (for example, both of them for ignition). Good contact) and the structural integrity of the bridging wire to keep the electrical ignition circuit closed (eg, to reduce the risk of the bridging wire breaking).

  However, in the method described in this document, since the first slurry (pyrotechnic material slurry) loaded from the open end of the loading casing has a viscosity of 500,000 centipoise or higher and is highly viscous, However, since a protrusion is formed on the upper surface (that is, the side where the ignition assembly is loaded), it is difficult to become horizontal. Therefore, in order to make the upper surface horizontal, some means is required when loading the slurry. If the upper surface is not leveled without any measures, i.e. if it is dry with protrusions, the bridge wire may be cut by this protrusion when the ignition assembly is attached to the open end of the loading casing. I'm worried.

Even if the top surface of the first slurry is horizontal, the ignition assembly including the bridging wire is loaded with respect to the first slurry (pyrotechnic material slurry) loaded in the loading casing and dried and solidified. Thus, the bridging wire is pressed against the solid, which can also damage the bridging wire.
JP-A-9-210596 US Pat. No. 6,009,809

  Therefore, the present invention solves the above-described conventional problems, ensures that the heating element and the pyrotechnic material are brought into contact with each other without damaging the heating element that generates heat due to the bridging wire or other ignition current, and further simplifies the manufacturing process. It is an object of the present invention to provide an inflator igniter that can be produced and a method for manufacturing the same.

  As a means for solving the above-mentioned problems, the present invention provides an inflator ignition comprising a pyrotechnic material collection space for containing a pyrotechnic material, and a heating element that generates heat by an ignition current on the bottom surface of the pyrotechnic material collection space. A pyrotechnic material is a pyrotechnic material slurry that contains a fuel component and an oxidizer component dispersed in a solvent, filled in a pyrotechnic material collection space, and dried. An inflator igniter is provided in which a pyrotechnic material existing in the space surrounds and closely contacts a heating element.

  The pyrotechnic material is a pyrotechnic material slurry in which a fuel component and an oxidizer component are dispersed in a solvent, filled in a pyrotechnic material collection space, and dried. For this reason, since the filled pyrotechnic material slurry is dried and solidified while surrounding the heating element, it is not necessary to press the heating element against the solidified pyrotechnic material, and damage and disconnection of the heating element can be prevented. In addition, the heating element and the pyrotechnic material can be further closely contacted. Especially when the viscosity of the pyrotechnic material slurry to be filled is low, unlike the case where the heating element is pressed against the solidified pyrotechnic material, the pyrotechnic material surrounds the entire heating element existing in the pyrotechnic material collection space. As a result, the contact with the heating element is improved, and as a result, the operational reliability is improved.

  The pyrotechnic material slurry is obtained by further uniformly dispersing an oxidant component in a fuel slurry in which a fuel component is uniformly dispersed in a solvent before drying. In particular, when the fuel component is composed of only a metal component, and the ignition sensitivity is high in a powder state and handling is difficult, the fuel component can be dispersed in a solvent together with a binder, so that handling with powder can be eliminated. In this case, since the fuel slurry needs to uniformly disperse the metal component in the solvent, the fuel slurry needs to be sufficiently stirred. At this time, if the viscosity of the fuel slurry is in the range of 1,000 to 500,000 centipoise, the fuel slurry can be sufficiently stirred, and a fuel slurry in which fuel components are uniformly dispersed in the solvent can be formed.

  In addition, since the pyrotechnic material is formed by filling the pyrotechnic material slurry into the pyrotechnic material collection space and drying it, in order to make ignition of the pyrotechnic material more reliable, Therefore, it is necessary to uniformly disperse the fuel component and the oxidant component. Therefore, if the viscosity of the pyrotechnic material slurry is in the range of 1,000 to 500,000 centipoise, the agitation can be sufficiently performed, and the pyrotechnic material in which the fuel component and the oxidizing component are uniformly dispersed in the solvent. A slurry can be formed. Then, if the pyrotechnic material slurry that has been sufficiently stirred is filled into the pyrotechnic material collection space of the igniter and dried, the resulting pyrotechnic material has a uniform fuel component and oxidizer component. Will be distributed. In such an igniter, since the pyrotechnic material in which the fuel component and the oxidizer component are uniformly dispersed is in close contact with the heating element, the pyrotechnic material is surely ignited by the heat generation of the heating element, and the ignition performance is improved. Reliability will be maintained.

  Further, since the pyrotechnic material is filled in the pyrotechnic material accommodation space in a slurry state, a charge holder that defines the periphery of the pyrotechnic material accommodation space is formed using a combustible material such as a synthetic resin. be able to. When filling the pyrotechnic material housing space, if the pyrotechnic material is in a dry powder form, it is disclosed in, for example, US Pat. No. 6,009,809 after filling the pyrotechnic material housing space. As a result, force is applied to the filled pyrotechnic material, such as pressing the pyrotechnic material against the heating element by the convex part formed at the closed end of the cup to ensure contact between the heating element and the pyrotechnic material. However, there is a possibility that a force is applied to the charge holder at that time, and as a result, the charge holder may be deformed. However, in the present invention, the pyrotechnic material is in the form of a slurry and is simply filled without applying pressure. Therefore, a resin charge holder can be used, and the thickness of the charge holder can be reduced. You can also Therefore, according to the igniter for an inflator of the present invention, a charge holder formed using a combustible material such as a resin can be used, and unintentional deformation of the charge holder can be eliminated. Furthermore, the charge holder is attached to the part where the heating element is provided (header part) to form a pyrotechnic material storage space. When the charge holder is formed using a combustible material, In addition, it is possible to fix it with a simple method such as bonding with an adhesive, and the charge holder will also be burned out by the combustion of pyrotechnic materials, so even if the bond to the header is weak, the igniter will be activated Will not scatter. Even when the charge holder is formed using metal, the thickness can be reduced, so that it can be easily formed by pressing, and as a result, the manufacturing cost can be reduced.

  In addition to forming the heating element as a bridge wire made of an electrical resistance wire or the like, it can also be formed as a heating part on a substrate at least partially disposed in the pyrotechnic material accommodation space. When the heating element is formed as a heating part on the substrate, the heating element can be easily formed according to the example of the electric circuit formation, the variation of the resistance value can be suppressed, and further, the disconnection to the heating element such as disconnection is possible. It can also eliminate adverse effects.

  The substrate can be further provided with an integrated circuit and a capacitor, thereby providing an inflator igniter that can be adapted to the bus system. In particular, in the present invention, since a slurry-like pyrotechnic material is used, even when an igniter that can be used for a bus system is formed, the capacitor and the integrated circuit are not adversely affected. In other words, if a powdered pyrotechnic material is used and pressed as described above, the pressure at the time of pressing may adversely affect the capacitors and integrated circuits that are electrical / electronic circuit components. However, the present invention can eliminate such a problem. Therefore, according to the present invention, in an igniter compatible with a bus system having such an integrated circuit and a capacitor, the contact between the pyrotechnic material and the heating element (heating part) is ensured, and the influence of pressure is also achieved. Thus, an inflator igniter is provided in which there is no possibility of damage to electronic components such as integrated circuits and capacitors.

  Further, the present invention provides a method for producing a pyrotechnic material slurry in which a fuel component and an oxidant component are dispersed in a solvent, and ignition of a plate-shaped header member as another means for solving the above problems. Provided is a method for manufacturing an inflator igniter comprising a step of dropping a pyrotechnic material slurry on a heating element that generates heat by an electric current, and a step of drying the dropped pyrotechnic material slurry.

  In the production method of the present invention, the pyrotechnic material slurry is dropped on a heating element provided on the header member and dried. Thereby, the close contact between the pyrotechnic material and the heating element is ensured, and the operational reliability can be ensured. Further, since it is not necessary to press the heating element against the dried and solidified slurry, the heating element can be prevented from being damaged or disconnected.

  In the inflator igniter and the manufacturing method thereof according to the present invention, the step of producing the pyrotechnic material slurry forms a fuel slurry in which a fuel component and a binder component are dispersed in a solvent, and an oxidant component is added thereto. It is desirable to add to form a pyrotechnic material slurry. In particular, when the fuel component consists only of metal components and the ignition sensitivity is high in the powder state and handling is difficult, the fuel component is dispersed in the solvent together with the binder, thereby eliminating the need for handling in powder form. That is, the risk of ignition of the fuel component can be eliminated. For example, when zirconium described later is used as a fuel component, the powder is very sensitive and easily ignited. Therefore, handling in a state of being dispersed in a solvent can improve safety during production.

  In addition, by adding a binder in the pyrotechnic material slurry, preferably in the fuel slurry, without causing a physical force such as compression or a force due to structural features, The slurry after drying can be reliably bonded.

  The fuel slurry and pyrotechnic material slurry have a viscosity of 1,000 to 500,000 centipoise, preferably 5,000 to 300,000 centipoise, and more preferably 10,000 to 100,000 centipoise. It is desirable to stir. By setting the viscosity within this range, the stirring work becomes easy and each component can be mixed uniformly. When the viscosity of the slurry to be stirred is higher than 500,000 centipoise, it becomes difficult for the components to be mixed, and protrusions are easily formed on the surface when dropped onto the heating element as described later. On the other hand, when the temperature is lower than 1,000, the drying time of the pyrotechnic material after being dropped on the heating element becomes too long, resulting in manufacturing inconvenience. The viscosity can be set within this range by adjusting the temperature of the fuel slurry or pyrotechnic material slurry, the environmental temperature, and the like, as well as adjusting the amount of solvent added.

  In the step of dripping the pyrotechnic material slurry onto the heating element, it is desirable to carry out the stirring. Since the metal component contained in the pyrotechnic material slurry has a large specific gravity, it sinks with time. Therefore, it is desirable to drop the slurry while stirring to uniformly disperse each component without causing the fuel component to sink. In particular, when the viscosity of the slurry is kept low for reasons such as uniformly dispersing each component, the metal material is liable to sink, and as a result, the pyrotechnic material slurry is heated with stirring. The significance of dripping into the water is great.

  When the pyrotechnic material slurry is dropped onto the heating element, a peripheral wall surface surrounding the heating element is provided on the surface side of the plate-shaped header member where the heating element that generates heat by the ignition current exists. It is desirable to attach a charge holder. If the charge holder is attached in advance, when the pyrotechnic material slurry is dropped onto the heating element, the pyrotechnic material slurry can be dropped into the space defined by the header member and the charge holder.

  This charge holder can be installed as it is after dropping of the pyrotechnic material slurry, and can be used as a space for accommodating the pyrotechnic material in the igniter. The charge holder is usually made of the same material as the header. For example, if the header is made of stainless steel, the charge holder can be made of stainless steel. However, the charge holder and the header can be formed of different materials. The charge holder is cylindrical and is attached by welding one end of the charge holder to the header. At this time, in order to prevent the charge holder from scattering when the igniter is operated, it is necessary to securely weld the charge holder and the header. However, on the other hand, the charge holder may be formed using a combustible material such as a synthetic resin so as to be destroyed or burned when the igniter is operated. If formed in this way, the charge holder itself is prevented from being scattered by the burnout of the igniter during operation. When the charge holder is formed of a combustible material such as a synthetic resin, a material that does not change at the drying temperature in the slurry drying step described later is used. In consideration of the point that it can be easily fixed to the header with an adhesive or the like, for example, epoxy is preferable although it depends on the drying temperature. The charge holder made of flammable material only serves as a kind of mold when dripping pyrotechnic material slurry onto the header, and once the slurry is solidified, the role as a charge holder is over It becomes. When the pyrotechnic material is ignited, the charge holder is also burned out, so it does not scatter.

  The fuel component is used in powder form, and powder selected from the group consisting of zirconium, iron, tin, manganese, cobalt, nickel, tungsten, titanium, magnesium, aluminum, niobium, and mixtures thereof may be used. Among them, a powder made of zirconium is preferable.

  The oxidant component is used in powder form, and is selected from the group consisting of perchlorates such as potassium perchlorate, lithium perchlorate, sodium perchlorate, and nitrates such as potassium nitrate, and mixtures thereof. The powder which consists of potassium perchlorate is especially preferable.

  An organic solvent such as isopropyl alcohol, methyl ethyl ketone, and hexane can be used as a solvent for dispersing the fuel component and the oxidant component.

  And as a binder which can be mix | blended with a pyrotechnic material slurry, a cellulose resin, a urethane resin, and a fluorine-type rubber composition are mentioned. In addition, an additive selected from the group consisting of glass powder, glass fiber, ceramic fiber, steel wool, bentonite, kaolinite and mixtures thereof can be used for the pyrotechnic material slurry. Particularly when potassium perchlorate is used as the oxidant component, the binder is preferably selected from the group consisting of hydroxypropylcellulose, nitrocellulose and urethane. This is to prevent potassium perchlorate from dissolving in the binder.

  Further, as a heating element that generates heat by an ignition current, in addition to a bridge wire that is an electric resistance wire, a heating circuit that includes a printed circuit, and further includes an integrated circuit and a capacitor can be used.

  Furthermore, by forming the airbag inflator using the inflator igniter, an airbag inflator that can be reliably operated is provided.

  That is, an inflator for an air bag used in an inflatable safety system of a vehicle, and an igniter for starting the operation of the inflator and a gas generation activated by the operation of the igniter in a housing having a gas discharge port The airbag inflator is characterized in that the igniter of the present invention is used as an igniter.

  As described above, the inflator igniter according to the present invention does not cause damage or disconnection of the heating element, and since the close contact between the pyrotechnic material and the heating element is reliable, the inflator igniter is sure to receive the operation signal. Thus, the gas generating means can be activated, and as a result, an airbag inflator is provided that can be reliably operated when necessary.

  Thus, the inflator igniter according to the present invention is a hybrid inflator, an inflator used to inflate a curtain-like airbag, a pyrotechnic inflator, a seat belt tensioner, a knee bolster, and the like. In various other inflators, it can be used for various purposes such as activating the gas generating means or destroying a member for sealing the gas for inflating the airbag.

  According to the method for manufacturing an inflator igniter of the present invention, the heating element and the pyrotechnic material are reliably brought into contact with each other without damaging the heating element that generates heat by an ignition current such as a bridge wire (crosslinking wire). An inflator igniter manufacturing method capable of simplifying the manufacturing process is provided, and the inflator igniter of the present invention eliminates damage to the heating element and ensures close contact between the heating element and the pyrotechnic material. Thus, an inflator igniter that operates reliably when needed is provided.

  Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments of the present invention. FIG. 1 is an axial sectional view showing an embodiment of an inflator igniter 100, FIG. 2 is a process diagram showing a manufacturing method of the inflator igniter 100 shown in FIG. 1, and FIG. 2 is an axial sectional view showing an embodiment of an igniter 200. FIG.

  An inflator igniter 100 shown in FIG. 1 holds a pair of conductive pins 101a and 101b that receive an electrical operation signal in an insulated state on a plate-like header member 102, and A cylindrical charge holder 103 is erected along the edge, and the bottom surface in the space formed by the charge holder 103 and the header member 102 (that is, the pyrotechnic material collection space 104), that is, the upper surface of the header member 102, A bridge wire 105 of a heating element that converts electrical energy into thermal energy is provided, and an igniter sub-assembly 106 is formed. The inflator igniter 100 is configured by housing the pyrotechnic material 107 in the pyrotechnic material collection space 104 in the igniter sub-assembly 106.

  In the igniter sub-assembly 106 in the present embodiment, one conductive pin 101a is joined to the annular portion 102a made of an electrical conductor in the header member 102 so that current can be passed, and the annular portion in the header member 102 is joined. The other conductive pin 101b is placed in a glass or other electrical insulator 102b filled in a hole existing in the center of 102a with its end face exposed on the upper surface of the header member 102. The upper surface of the annular portion 102a, the upper surface of the electrical insulator 102b, and the end surface of the conductive pin 101 present in the central hole portion of the annular portion 102a are flush with each other, and are electrically insulated from the upper surface of the annular portion 102a. Between the end faces of the conductive pins 101b held by the body 102b, a heating element that generates heat by an ignition current, that is, a bridge wire 105 is installed.

  In the igniter sub-assembly 106 according to the present embodiment, a cylindrical charge holder 103 is provided on the surface of the header member 102 on which the bridge wire 105 is provided, and the two are joined together. However, the charge holder 103 can be formed integrally with the header member 102. The header member 102 and the charge holder 103 may be formed of the same material, and one end of the charge holder 103 may be attached to the header member 102 by welding, or the header member 102 and the charge holder 103 may be made of different materials (for example, a header The member 102 may be made of stainless steel and the charge holder 103 may be made of a combustible material, and both may be fixed with an adhesive. In addition, the header member 102 is formed of an insulating material such as resin, and the end surfaces of the respective conductive pins 101 are exposed on the upper surface of the header member 102, and the bridge wire 105 is provided between the end surfaces of the conductive pins 101. It can also be erected.

  In the present embodiment, the pyrotechnic material 107 accommodated in the space 104 formed by the header member 102 and the charge holder 103 is a fire containing a fuel component 107a and an oxidant component 107b dispersed in a solvent. The material slurry 107s is filled in the pyrotechnic material collection space 104 and dried. An example of a method for manufacturing the inflator igniter 100 will be described with reference to FIG.

  First, a fuel component 107a made of zirconium powder and a binder 107c selected from the group consisting of hydroxypropyl cellulose, nitrocellulose and urethane are dispersed in a solvent 107d selected from isopropyl alcohol, methyl ethyl ketone, hexane, etc., and fuel slurry is obtained. 107 s ′, which is stirred at a viscosity of 1,000 to 500,000 centipoise [FIG. 2 (a)].

  Then, this fuel slurry 107s' is mixed with potassium perchlorate as an oxidant component 107b to form a pyrotechnic material 107 slurry, which is further stirred at a viscosity of 1,000 to 500,000 centipoise [FIG. ]].

  Since the fuel slurry 107s' and the pyrotechnic material slurry 107s have a viscosity of 1,000 to 500,000 centipoise, the components 107a to 107c can be highly dispersed. Since the zirconium powder of the fuel component 107a is used by being dispersed in the solvent 107d together with the binder 107c, unintentional ignition during production can be prevented.

  After the pyrotechnic material slurry 107s is sufficiently stirred and each component is sufficiently dispersed, the pyrotechnic material slurry 107s is dispersed in the space formed by the header member 102 and the charge holder 103 in the igniter sub-assembly 106, that is, the pyrotechnic material is collected. The space 104 is filled with stirring [FIG. 2 (c)]. By filling the pyrotechnic material slurry 107s with stirring, nonuniform composition due to the sinking of fuel components during filling can be prevented.

  Then, after drying the pyrotechnic material slurry 107s filled in the pyrotechnic material collection space 104, the space 104 is closed [FIG. 2 (d)]. At the time of closing, as shown in FIG. 2 (d), the cover member 120 is closed by a cover member 120 that covers only the open end (upper end) of the charge holder 103, or the peripheral wall extends to the charge holder at the periphery of the cover member. The lid member having the portion can be covered from the upper part of FIG. 2 and the lower end portion of the peripheral wall portion can be closed by welding (laser welding or the like) to the header outer peripheral portion. When the lid member 120 is fixed by welding, the latter is desirable in order to suppress the thermal influence on the pyrotechnic material 107. In particular, the pyrotechnic material slurry 107s filled in the space 104 is adjusted to have a viscosity of 1,000 to 500,000 centipoise as described above, so that the drying time does not become too long.

  Further, in the above manufacturing method, the pyrotechnic material 107 is made into a slurry (107s) and filled with this [FIG. 2 (c)], so that the pyrotechnic material is pressed against the bridge wire 105 or dried. -It is not necessary to press the bridge wire 105 against the solidified pyrotechnic material, and therefore the bridge wire 105 is not damaged. Further, since the filled pyrotechnic material slurry 107s is dried as it is, the bridge wire 105 and the pyrotechnic material 107 are surely brought into close contact with each other.

  FIG. 3 shows an embodiment of an inflator igniter 200 that uses an integrated circuit 205c as a heating element that converts electrical energy into thermal energy. The igniter 200 shown in this figure is an igniter 200 that can particularly correspond to a bus system provided in a vehicle, and can include an integrated circuit 205c, a capacitor, and the like.

  In this igniter 200, an integrated circuit 205c and a heat generating part 206 are provided on a substrate 205, and a part other than the heat generating part 206 is surrounded by a resin 210, and the heat generating part 206 protrudes into the pyrotechnic material accommodation space 204. An igniter, and a pair of conductive pins 201 are connected to the circuit. Thus, when the conductive pin 201 receives the operation signal, it is determined whether or not the integrated circuit 205c is operated, and when the operation is necessary, heat is generated and the pyrotechnic material 107 is ignited and burned.

  Also in this igniter 200, the pyrotechnic material 107 is in the form of slurry (107s) filled in the pyrotechnic material collection space 204, so that the substrate 205 (substantially an integrated circuit 205c, a capacitor, etc.) The heat generating portion 206 and the pyrotechnic material 107 can be reliably brought into close contact with each other without damage.

It is a longitudinal cross-sectional view which shows the igniter for inflators. It is a process figure which shows the manufacturing method of the igniter for inflators. It is a longitudinal cross-sectional view which shows the other igniter for inflators.

Explanation of symbols

100,200 Inflator igniter
101,201 Conductive pin
102 Header material
103 Charge holder
104,204 Pyrotechnic material collection space
105 bridge wire
106 igniter sub-assembly
107 Pyrotechnic materials
107s pyrotechnic material slurry
205c integrated circuits
205 Printed circuit board

Claims (11)

  1. A step of producing a pyrotechnic material slurry having a viscosity of 1,000 to 300,000 centipoise, comprising a fuel component and an oxidant component dispersed in a solvent;
    An inflator igniter comprising a step of dropping a pyrotechnic material slurry onto a heating element that generates heat by an ignition current of a plate-shaped header member, and a step of drying the dropped pyrotechnic material slurry. Production method.
  2. Step process according to claim 1, wherein the fuel component and a binder component comprising the step of viscosity 1,000 to 300,000 centipoise fuel slurry obtained by dispersing in a solvent to produce the pyrotechnic material slurry .
  3. The step of preparing the pyrotechnic material slurry, according to claim 1 or 2 wherein the pyrotechnic material slurry viscosity 1,000 to 300,000 centipoise obtained by further adding an oxidizing agent component in the fuel slurry comprising the step of 拌Manufacturing method.
  4. The manufacturing method according to any one of claims 1 to 3 , wherein the pyrotechnic material slurry further contains a binder selected from the group consisting of cellulose derivatives, urethanes, rubbers, and mixtures thereof.
  5. The method according to claim 4 , wherein the cellulose derivative is hydroxypropyl cellulose.
  6. Wherein the pyrotechnic material slurry, further glass powder, glass fibers, ceramic fibers, steel wool, bentonite, kaolinite and any one of claims 1 to 5 shall be selected are formulated from mixtures thereof The manufacturing method of description.
  7. The fuel component is a powder selected from the group consisting of zirconium, iron, tin, manganese, cobalt, nickel, tungsten, titanium, magnesium, aluminum, niobium, and mixtures thereof;
    The manufacturing method according to any one of claims 1 to 6 , wherein the oxidant component is a powder selected from the group consisting of potassium perchlorate, lithium perchlorate, sodium perchlorate, and a mixture thereof.
  8. The oxidizer component is potassium perchlorate, the pyrotechnic material slurry is further hydroxypropylcellulose, of any one of claims 1 to 7, containing a binder selected from the group consisting of nitrocellulose and urethane Production method.
  9. Step, agitation manufacturing method of any one of claims 1-8 to be performed dropping the pyrotechnic material slurry.
  10. A charge holder having a peripheral wall surface surrounding the heating element is attached to the surface side of the header member formed in a plate shape on which the heating element that generates heat by an ignition current exists,
    The manufacturing method according to any one of claims 1 to 9 , wherein in the step of dripping the pyrotechnic material slurry, the pyrotechnic material slurry is dropped into a space defined by a header member and a charge holder.
  11. The manufacturing method according to claim 10 , wherein the charge holder is formed using a synthetic resin.
JP2003302679A 2002-09-02 2003-08-27 Inflator igniter and manufacturing method thereof Active JP4206009B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2002256565 2002-09-02
JP2003302679A JP4206009B2 (en) 2002-09-02 2003-08-27 Inflator igniter and manufacturing method thereof

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2003302679A JP4206009B2 (en) 2002-09-02 2003-08-27 Inflator igniter and manufacturing method thereof
PCT/JP2003/011079 WO2004023063A1 (en) 2002-09-02 2003-08-29 Igniter for inflator and process for producing the same
EP03794146A EP1548391B1 (en) 2002-09-02 2003-08-29 Igniter for inflator and process for producing the same
US10/652,238 US6976430B2 (en) 2002-09-02 2003-09-02 Igniter for inflator and method of manufacturing thereof

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JP2007170687A (en) * 2005-12-19 2007-07-05 Daicel Chem Ind Ltd Method of supplying pyrotechnic material slurry
JP4473818B2 (en) 2005-12-28 2010-06-02 昭和金属工業株式会社 Initiator igniter, method for producing the same, and method for producing initiator using the same
JP5020571B2 (en) * 2006-08-29 2012-09-05 株式会社ダイセル Manufacturing method of electric igniter
JP4705550B2 (en) * 2006-10-26 2011-06-22 日本化薬株式会社 Gas generator for squib and airbag and gas generator for seat belt pretensioner
JP4668889B2 (en) * 2006-12-01 2011-04-13 ルネサスエレクトロニクス株式会社 Ignition element mounted capacitor, header assembly, squib, gas generator for airbag and gas generator for seat belt pretensioner
DE102007021451A1 (en) * 2007-04-05 2008-10-09 Rwm Schweiz Ag Sub-projectile with energetic content
EP2791615B1 (en) * 2011-12-14 2016-03-02 Detnet South Africa (Pty) Ltd Detonator

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JP3175051B2 (en) * 1999-10-14 2001-06-11 昭和金属工業株式会社 Electric ignition type initiator

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JP2004115001A (en) 2004-04-15

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