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JPH02164409A - Manufacture of filter for gas generator - Google Patents

Manufacture of filter for gas generator

Info

Publication number
JPH02164409A
JPH02164409A JP31899788A JP31899788A JPH02164409A JP H02164409 A JPH02164409 A JP H02164409A JP 31899788 A JP31899788 A JP 31899788A JP 31899788 A JP31899788 A JP 31899788A JP H02164409 A JPH02164409 A JP H02164409A
Authority
JP
Japan
Prior art keywords
filter
gas generator
bending
wire
gas
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
JP31899788A
Other languages
Japanese (ja)
Other versions
JPH051046B2 (en
Inventor
Katsuhiro Maruyama
丸山 克博
Doryo Minoura
箕浦 道了
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.)
NGK Insulators Ltd
Original Assignee
NGK Insulators Ltd
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 NGK Insulators Ltd filed Critical NGK Insulators Ltd
Priority to JP31899788A priority Critical patent/JPH02164409A/en
Priority to DE1989627742 priority patent/DE68927742T2/en
Priority to DE1989621302 priority patent/DE68921302T2/en
Priority to EP94111605A priority patent/EP0623373B1/en
Priority to EP19890312018 priority patent/EP0370734B1/en
Publication of JPH02164409A publication Critical patent/JPH02164409A/en
Publication of JPH051046B2 publication Critical patent/JPH051046B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/264Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic
    • B60R21/2644Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D39/00Filtering material for liquid or gaseous fluids
    • B01D39/14Other self-supporting filtering material ; Other filtering material
    • B01D39/20Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2027Metallic material
    • B01D39/2041Metallic material the material being filamentary or fibrous

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Air Bags (AREA)
  • Filtering Materials (AREA)
  • Wire Processing (AREA)

Abstract

PURPOSE:To manufacture the title device being miniaturized and available which is easily attached to a gas generator and capable of preventing deterioration of gas permeability by bending and working a heat resistant steel wire into a corrugated shape and supplying the bend wire rod into the annular space of a die and annularly laminating it and thereafter annularly compressing and molding the laminated body. CONSTITUTION:A heat resistant steel wire 1 having 0.1-1.5mm wire diameter is bent and worked into a corrugated shaped or a coil shape. The obtained bent wire rod 3 is supplied into the annular space 7d of a bottom force 7a and annularly laminated and thereafter the laminated body is compressed and molded by a top force 6. As a result, a miniature and available filter 9 for a gas generator can be manufactured in a simple stage which is easily attached to the gas generator and capable of preventing the short path of gas, erosion and deterioration of gas permeability.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は車両衝突時に乗員を保護するエアバッグや浮
力発生用バッグの膨張用、バルブ緊急開閉用、座席緊急
射出用等に用いるガス発生器のフィルタの製造方法に関
する。
[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a gas generator used for inflating airbags and buoyancy generation bags that protect occupants in the event of a vehicle collision, for emergency opening/closing of valves, for emergency seat injection, etc. The present invention relates to a method for manufacturing a filter.

〔従来の技術〕[Conventional technology]

この種のガス発生器としては、火薬を燃焼させて発生し
た高温ガスを用いる方式が広く採用されているが、バッ
グ等の損傷を避けるためのガスの冷却およびガス中の有
害成分の捕集のために、フィルタを用いる必要がある。
As this type of gas generator, a method that uses high-temperature gas generated by burning gunpowder is widely adopted, but in order to avoid damage to bags etc., it is necessary to cool the gas and collect harmful components in the gas. Therefore, it is necessary to use a filter.

このフィルタとしては、たとえば特開昭51−6033
3号公報に開示されているように、冷却室に直線状の金
属線材ないし金風棒を充填したものや、ステンレス線の
金網(平織量)をケーシング内径寸法に合せて裁断した
ものを複数枚積層したもの、スチールウール、金属やセ
ラミックの発泡材、金属製の邪魔板など各種のものが用
いられている。
As this filter, for example, Japanese Patent Application Laid-Open No. 51-6033
As disclosed in Publication No. 3, the cooling chamber is filled with straight metal wire rods or metal wind rods, or multiple sheets of stainless steel wire mesh (plain weave) are cut to match the inner diameter of the casing. A variety of materials are used, including laminates, steel wool, metal and ceramic foam, and metal baffles.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

ところが上記各フィルタのうち、直線状の金属線材ない
し金属棒は、弾性がないためケーシングとの間にすきま
を生じてガスがショートパスし、またセットに手間がか
かり容積もかさむという欠点がある。また金網も弾性が
少ないので上記ショートパスを生じやすく、また20〜
300メツシユのものを交互に積層するため装填に手間
がかかる。さらにスチールウールは高温ガスにより溶損
しやすく高価でもあり、発泡材は弾性がなく通気性が劣
るうえ高価であり、また邪魔板は構造が複雑で装置が大
型となり、有害生成物の捕集効果が劣るなど、種々の欠
点を有するものであった。
However, among the above-mentioned filters, the linear metal wire or metal bar has the disadvantage that it has no elasticity and thus creates a gap with the casing, causing a short pass of gas, and that it takes time and effort to set up and is bulky. In addition, since the wire mesh has little elasticity, it is easy to cause the short pass mentioned above, and
Loading is time-consuming because 300 meshes are stacked alternately. Furthermore, steel wool is easily eroded by high-temperature gas and is expensive; foamed materials have no elasticity, poor breathability, and are expensive; baffle plates have a complicated structure, require large equipment, and are not effective at capturing harmful products. It had various drawbacks, including inferior performance.

この発明は上記従来の欠点を解消するもので、ガス発生
器への装着が容易であり、ガスのショートパス、溶損お
よび通気性の悪化を防止できる小型で有用なガス発生器
用フィルタを簡潔な工程により製造できる製造方法を提
供しようとするものである。
This invention solves the above-mentioned conventional drawbacks, and provides a simple and compact filter for gas generators that is easy to attach to a gas generator and can prevent short gas passes, melting, and deterioration of air permeability. The purpose is to provide a manufacturing method that can be manufactured through multiple steps.

〔課題を解決するための手段〕[Means to solve the problem]

しかしてこの出願の第1の発明のフィルタの製造方法は
、線径0.1〜1.5 trysの耐熱鋼線を波状また
はコイル状に屈曲加工し、得られた屈曲線材を金型の環
状空間内に供給して環状にW415後、環状に圧縮成形
することを特徴とするガス発生器用フィルタの製造方法
である。
However, the method for manufacturing a filter according to the first invention of this application involves bending a heat-resistant steel wire with a wire diameter of 0.1 to 1.5 tries into a wave or coil shape, and bending the obtained bent line material into an annular shape of a mold. This is a method for manufacturing a filter for a gas generator, characterized in that the filter is supplied into a space, subjected to W415 in an annular shape, and then compressed into an annular shape.

またこの出願の第2の発明のフィルタの製造方法は、線
径0.1〜1.5 mの耐熱鋼線を波状またはコイル状
に屈曲加工し、得られた屈曲線材を金型の環状空間内に
供給して環状に積層後、環状に圧縮成形して一次成形品
とし、この一次成形品の断面を取巻くように締結材を巻
付け、次にこの巻付後の一次成形品をさらに環状に圧縮
成形することを特徴とするガス発生器用フィルタの製造
方法である。
In addition, the method for manufacturing a filter according to the second invention of this application involves bending a heat-resistant steel wire with a wire diameter of 0.1 to 1.5 m into a wavy or coiled shape, and inserting the obtained bent line material into an annular space of a mold. After being laminated into an annular shape, compression molding is performed into an annular shape to form a primary molded product, a fastening material is wrapped around the cross section of this primary molded product, and then this wrapped primary molded product is further laminated into an annular shape. This is a method for manufacturing a filter for a gas generator, characterized in that the filter is compression molded.

またこの出願の第3の発明のフィルタの製造方法は、線
径0.1〜1.5 mの耐熱鋼線を波状またはコイル状
に屈曲加工し、得られた屈曲線材を金型の環状空間内に
供給して環状に積層後、環状に圧縮成形して外周に軸線
方向に延びる複数本の凹溝を形成させることを特徴とす
るガス発生器用フィルタの製造方法である。
Further, in the method for manufacturing a filter according to the third invention of this application, a heat-resistant steel wire with a wire diameter of 0.1 to 1.5 m is bent into a wave shape or a coil shape, and the obtained bent line material is placed in an annular space of a mold. This method of manufacturing a filter for a gas generator is characterized in that the gas generator is supplied into a gas generator, stacked in an annular shape, and then compressed into an annular shape to form a plurality of concave grooves extending in the axial direction on the outer periphery.

この発明において耐熱鋼線としては、たとえばステンレ
ス鋼線、ニッケル合金鋼線、コバルト合金鋼線などの、
耐熱性を有する各種鋼線を用いることができる。この耐
熱鋼線の線径は、0.1 m未満とすると溶損のおそれ
があり、1.5 mを越えると屈曲加工および圧縮成形
時の加工抵抗が過大となり、またガスの流通するすきま
が過大となり、ガスの冷却効果および有害成分の捕集効
果が劣るので好ましくない。そしてこの耐熱鋼線として
は通常のダイス引抜きされた長尺の線材を用いることが
できるが、このほかに、溶鋼表面に回転する水冷ディス
クを接触させて少ωの溶鋼を掻取って細いファイバ状の
線材として側方へ集積させるメルトエクストラクション
法とよばれる方法により製造した、長さ50〜300#
lff1程度の短尺の線材を用いれば、材料費が安価で
すみ好ましい。
In this invention, heat-resistant steel wires include stainless steel wires, nickel alloy steel wires, cobalt alloy steel wires, etc.
Various heat-resistant steel wires can be used. If the wire diameter of this heat-resistant steel wire is less than 0.1 m, there is a risk of melting damage, and if it exceeds 1.5 m, the processing resistance during bending and compression molding will be excessive, and there will be gaps for gas to flow. This is not preferable because it becomes too large and the gas cooling effect and harmful component trapping effect are inferior. As this heat-resistant steel wire, a long wire rod drawn through a normal die can be used, but it is also possible to use a rotating water-cooled disk on the surface of the molten steel to scrape off the molten steel with a low ω to form a thin fiber. 50 to 300 # length manufactured by a method called melt extraction method in which wire rods are accumulated laterally.
It is preferable to use a short wire of about lff1 because the material cost is low.

この発明において耐熱鋼線を波状に屈曲加工する場合、
正弦波ないしこれに似た曲線状の波形、あるいは鋸歯状
波や矩形波のような折曲直線状の波形など、各種の波形
に屈曲加工することができ、第3図に示すようにピッチ
Pが5〜10m、波高Hが3〜6InIRの波状に屈曲
加工すると、圧縮成形品の線間すきまが過大とならず、
かつ適度の絡み合いにより良好に一体化するので、特に
好ましい。
In this invention, when bending a heat-resistant steel wire into a wavy shape,
It can be bent into various waveforms, such as a sine wave or a similar curved waveform, or a bent straight waveform such as a sawtooth wave or a rectangular wave, and the pitch P as shown in Figure 3. When bending into a wave shape with a wave height of 5 to 10 m and a wave height of 3 to 6 InIR, the gap between the lines of the compression molded product will not become excessive.
Moreover, it is particularly preferable because it is well integrated by moderate entanglement.

またこの波状の屈曲加工は、線材を1回だけの屈曲加工
により一方向(たとえば前後方向)にのみ波状に屈曲加
工(平面波加工)した屈曲線材とするほか、上記屈曲線
材をさらに別方向(たとえば左右方向)に波状に屈曲加
工する等、屈曲方向の異なる複数回の屈曲加工をおこな
って多方向に波状に屈曲加工(立体波加工)した屈曲線
材とすれば、屈曲線材がその後の巻付や圧縮工程におい
て絡み合いやすく、型くずれが一層少なく寸法精度が良
好であるとともに、内部のすきまが均一で方向性の少な
いフィルタが得られるので、特に好ましい。なおこのよ
うに波状の屈曲加工を複数回おこなう場合は、後工程の
屈曲ピッチを前工程の屈曲ピッチより小とするなど、ピ
ッチを変えるのがよく、ピッチが同一あるいは近似して
いると、線材がねじれて後工程の屈曲加工がおこないに
くいので好ましくない。
In addition, this wavy bending process can be performed by bending the wire rod only once to create a wavy bending process (plane wave process) in only one direction (for example, front-to-back direction), or by bending the wire rod in another direction (for example, If the bent line material is bent into a wave shape in multiple directions (stereo wave processing) by bending it multiple times in different bending directions, such as by bending it into a wave shape in the left-right direction, the bent line material will be easily wrapped and It is particularly preferable because it is easy to get entangled in the compression process, has less deformation, has good dimensional accuracy, has uniform internal gaps, and has less directional properties. When performing wavy bending multiple times like this, it is best to change the pitch by making the bending pitch in the subsequent process smaller than the bending pitch in the previous process.If the pitches are the same or similar, the wire rod This is not preferable because it becomes twisted and makes it difficult to perform the bending process in the subsequent process.

またこの発明において耐熱#laをコイル状に屈曲加工
する場合、ピッチが1〜5IfR、ピッチ円径が3〜6
間のコイル状に屈曲加工すると、圧縮成形品の線間すき
まが過大とならず、かつ適度の絡み合いにより良好に一
体化するので、特に好ましい。
In addition, in this invention, when heat-resistant #la is bent into a coil shape, the pitch is 1 to 5 IfR, and the pitch circle diameter is 3 to 6.
It is particularly preferable to bend the wires into a coil shape between the wires, since the gaps between the wires of the compression-molded product will not become too large and the wires will be well integrated due to appropriate intertwining.

またこの発明においては、圧縮成形によりフィルタのか
さ比重の調整をおこなうことができるが、かさ比重が1
未満ではかさばり大型化し、かさ比重が3を越えると通
気抵抗が過大となり、好ましくない。
In addition, in this invention, the bulk specific gravity of the filter can be adjusted by compression molding.
If the bulk specific gravity is less than 3, the bulk density becomes bulky and large, and if the bulk specific gravity exceeds 3, the ventilation resistance becomes excessive, which is not preferable.

〔作用〕[Effect]

この発明のガス発生器用フィルタの製造方法においては
、耐熱鋼線を屈曲加工後金型の環状空間内に直接供給し
て環状に圧縮成型するので、工程が簡単で、設備費も安
価で済む。最終工程の環状の圧縮成形により得られたフ
ィルタは、屈曲線材の圧縮成形品であるため、弾性を有
しケーシングへの装着状態においてケーシング内壁面に
密着し、また屈曲線材が互いに絡み合って一体化し、型
くずれが少なく、取扱いやすい。
In the method for manufacturing a filter for a gas generator of the present invention, the heat-resistant steel wire is directly fed into the annular space of the mold after bending and compression molded into an annular shape, so the process is simple and the equipment cost is low. The filter obtained by the annular compression molding in the final process is a compression molded product of bent line materials, so it has elasticity and adheres closely to the inner wall surface of the casing when attached to the casing, and the bent line members intertwine with each other and become integrated. , less deformation and easy to handle.

また第2の発明の製造方法によれば、一次成形品に締結
材を巻付けたのちさらに環状に圧縮形成するので、得ら
れたフィルタにおいて締結材が成形品のほぐれを防止し
、さらに短尺の屈曲線材を用いる場合でも線材端が外方
へ突出するのを抑制し、型くずれが一層少なく取扱いや
すいフィルタが得られる。
Further, according to the manufacturing method of the second invention, after the fastening material is wrapped around the primary molded product, it is further compressed into an annular shape. Even when a bent line material is used, the ends of the wire are prevented from protruding outward, and a filter that is less likely to lose its shape and is easier to handle can be obtained.

また第3の発明の製造方法によれば、めんどうな手作業
なしに圧縮成形工程のみによって外周に軸線方向に延び
る複数本の凹溝をそなえた環状のフィルタが得られ、こ
の凹溝は局部的な圧縮により形成されたものであるため
、成形品のほぐれを防止し、さらに短尺の屈曲線材を用
いる場合でも線材端が外方へ突出するのを抑制し、型く
ずれが一層少なく取扱いやすいフィルタが得られる。
Further, according to the manufacturing method of the third invention, an annular filter having a plurality of grooves extending in the axial direction on the outer periphery can be obtained by only the compression molding process without laborious manual work, and the grooves are formed locally. Because it is formed by compression, it prevents the molded product from unraveling, and even when using short bending line materials, the ends of the wire are prevented from protruding outward, resulting in a filter that is easier to handle with less deformation. It will be done.

〔実施例〕〔Example〕

以下第1図および第2図によりこの発明の第1実施例を
説明する。
A first embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

先ずメルトエクストラクション法により製造された線径
0.4 m、長さ50〜100線のステンレス鋼線(耐
熱鋼線)1を、すきまをもって噛合う歯車2.2間を通
して左右方向に屈曲加工してピッチ7M、波高4mmの
一次屈曲線材3aとしたのち、下段側に配置され歯車2
と直交する軸線を有する歯車4,4により、前記一次回
曲線材3aをさらに前後方向に、ピッチ3.4s、波高
21Mの屈曲加工を施し、二方向に波状に屈曲した屈曲
線材3を得た。[第1図(a)] この屈曲線材3を、上型6と下型7とから成る金型の下
型7の環状空間7d内に供給して[同図(b)]、この
積層充填層8に対して上型6を押圧して、圧縮成形によ
りかさ比重1.5の環状のフィルタ9を得た。[同図(
C)、(d) ]なお上型6は穴あき円柱体状を呈し、
下型7は円筒状の外型7aと、ロッド状の内型7bと、
昇降自在な穴あき円板状の底板7Cとから成る。
First, a stainless steel wire (heat-resistant steel wire) 1 with a wire diameter of 0.4 m and a length of 50 to 100 wires manufactured by the melt extraction method was passed between gears 2 and 2 meshing with a gap and bent in the left-right direction. After that, the primary bending line material 3a with a pitch of 7M and a wave height of 4mm is made, and then the gear 2 is placed on the lower stage side.
The primary curved material 3a was further bent in the front-rear direction with a pitch of 3.4s and a wave height of 21M using gears 4, 4 having axes perpendicular to the curved material 3, to obtain a bent curved material 3 bent in a wavy manner in two directions. . [FIG. 1(a)] This bending line material 3 is supplied into the annular space 7d of the lower mold 7 of the mold consisting of the upper mold 6 and the lower mold 7 [FIG. 1(b)], and this laminated filling is performed. The upper die 6 was pressed against the layer 8, and an annular filter 9 having a bulk specific gravity of 1.5 was obtained by compression molding. [Same figure (
C), (d)] The upper die 6 has a cylindrical shape with holes,
The lower mold 7 includes a cylindrical outer mold 7a, a rod-shaped inner mold 7b,
It consists of a perforated disk-shaped bottom plate 7C that can be raised and lowered.

得られたフィルタ9は、屈曲線材3が充分絡み合って、
型くずれしにくく、寸法精度も良好であり、また各部の
すきまがより均一で方向性の少ないフィルタであった。
In the obtained filter 9, the bent line members 3 are sufficiently intertwined,
It was a filter that did not easily lose its shape, had good dimensional accuracy, and had more uniform gaps between parts and less directional properties.

そしてこのフィルタ9は、第2図に示すようにガス発生
器10のケーシング11の環状の冷却ろ過室11a内に
圧入装填し、キャップ12を被着して用いる。フィルタ
9は弾性を有し、かつ一体成形され型くずれしないので
、ケーシング11への装填はワンタッチで容易におこな
える。燃焼室13内に装填したガス発生剤14に点火器
15により点火すれば、ガス発生剤14が爆発燃焼して
高温ガスが発生し、この高温ガスは通気孔16を通って
フィルタ9を通過し、冷却と有害生成物の捕集が゛おこ
なわれたのち、ガス噴出口17から噴出し、エアバッグ
等のガス利用側へ供給される。
As shown in FIG. 2, this filter 9 is press-fitted into an annular cooling filtration chamber 11a of a casing 11 of a gas generator 10, and a cap 12 is attached thereto. Since the filter 9 has elasticity and is integrally molded so that it does not lose its shape, it can be easily loaded into the casing 11 with a single touch. When the gas generating agent 14 loaded in the combustion chamber 13 is ignited by the igniter 15, the gas generating agent 14 explodes and burns to generate high temperature gas, which passes through the filter 9 through the vent hole 16. After cooling and collection of harmful products, the gas is ejected from the gas ejection port 17 and supplied to the gas utilization side such as an airbag.

次に第4図はこの発明の第2実施例を示し、メルトエク
ストラクション法により製造されたIn0.25am、
長さ50〜100mのステンレス鋼線(耐熱鋼線)21
を、すきまをもって噛合う歯車2.2間を通して左右方
向にのみ屈曲加工し、ピッチ7m、波高4IIII&の
屈曲線材22を得た。[第4図(a)] この屈曲線材22を、前記実施例と同様に下型7の環状
空間7d内に供給して積層充填層8を形成させ[同図(
b)]、次いで上型6と下型7により圧縮成形して、最
終製品であるフィルタ26よりも高さHが大きい環状の
一次成形品24とした。
Next, FIG. 4 shows a second embodiment of the present invention, in which In0.25am manufactured by the melt extraction method,
Stainless steel wire (heat-resistant steel wire) 21 with a length of 50 to 100 m
was passed between gears 2.2 meshing with a gap and bent only in the left-right direction to obtain a bent line material 22 with a pitch of 7 m and a wave height of 4III&. [FIG. 4(a)] This bending line material 22 is supplied into the annular space 7d of the lower mold 7 to form the laminated filling layer 8 in the same manner as in the previous embodiment [FIG. 4(a)]
b)], and then compression molded using an upper mold 6 and a lower mold 7 to obtain an annular primary molded product 24 having a height H greater than that of the final product filter 26.

[同図(C)、(d) ] 次に別途準備した数本の前記屈曲線材を前記一次成形品
24の断面を取巻く締結材25として巻付け、はぐれ防
止用とする。[同図(d)]そしてこの巻付後の一次成
形品を、上型6と下型7によりさらに圧縮成形して[同
図(e)]、かさ比重1.5の環状のフィルタ26を得
た。[同図(f)] 得られたフィルタ26においては、締結材25が屈曲線
材22を包囲してそのほぐれを防止するとともに、短尺
の屈曲線材22の線材端が外方へ突出するのを抑制して
おり、型くずれしにくく、また取扱いやすい。
[Figures (C) and (d)] Next, several separately prepared bent line members are wrapped around the cross section of the primary molded product 24 as a fastening member 25 to prevent it from coming off. [Image (d)] This wrapped primary molded product is further compression molded using an upper mold 6 and a lower mold 7 [Image (e)] to form an annular filter 26 with a bulk specific gravity of 1.5. Obtained. [Image (f)] In the obtained filter 26, the fastening material 25 surrounds the bent line material 22 to prevent it from unraveling, and also suppresses the wire ends of the short bent line members 22 from protruding outward. It is hard to lose its shape and is easy to handle.

次に第5図乃至第7図はこの発明の第3実施例を示し、
第2実施例と同じステンレス鋼線21に対し、第2実施
例と同じ屈曲加工[第5図(a)]および下型7内への
供給[同図(b)]をおこない、得られた積層充填層8
に対して第2実施例と同様に金型で圧縮成形を施して、
環状の一次成形品24とした。[同図(C)、(d) 
] 次に第5図(e)および第6図および第7図に示すよう
に、円筒体の内壁面40に、上部が該内壁面に向って傾
斜する複数本(この実施例では6本)の突条41を突設
した外型42aと、Oラド状の内型42bと、この外型
42aおよび内型42bに嵌合して昇降自在な底板42
cとから成る下型42と、前記内壁面40に嵌合する外
周面に、前記突条41に嵌合する凹溝43を凹設した穴
あき円柱体状の上型44とを用い、前記一次成形品24
の圧縮成形をおこなった。[第5図(e)]すなわち、
下型42の上部に一次成形品24を装入し、上型44を
圧下して一次成形品24を下方へ押込み、軸線方向に圧
縮するとともに、突条41により一次成形品24の外周
部を局部圧縮して、外周部に軸線方向に延びる6本の凹
溝31を有するフィルタ30を得た。[同図(「)]こ
のフィルタ30においては、外周に形成された凹溝31
が屈曲線材22のほぐれを防止するとともに、短尺の屈
曲線材22の線材端が外方へ突出するのを抑制しており
、型くずれしにくく、また取扱いやすい。
Next, FIGS. 5 to 7 show a third embodiment of this invention,
The same stainless steel wire 21 as in the second embodiment was subjected to the same bending process as in the second embodiment [FIG. 5(a)] and fed into the lower die 7 [FIG. 5(b)]. Laminated filling layer 8
Compression molding was performed using a mold in the same manner as in the second embodiment, and
A ring-shaped primary molded product 24 was obtained. [Figure (C), (d)
] Next, as shown in FIG. 5(e), FIG. 6, and FIG. 7, on the inner wall surface 40 of the cylindrical body, there are a plurality of pipes (six in this example) whose upper portions are inclined toward the inner wall surface. An outer mold 42a having a protruding ridge 41 projecting thereon, an O-rad-shaped inner mold 42b, and a bottom plate 42 that fits into the outer mold 42a and the inner mold 42b and is movable up and down.
c, and a perforated cylindrical upper mold 44 having a recessed groove 43 that fits into the protrusion 41 on the outer peripheral surface that fits into the inner wall surface 40, Primary molded product 24
Compression molding was performed. [Figure 5(e)] That is,
The primary molded product 24 is charged into the upper part of the lower mold 42, and the upper mold 44 is pressed down to push the primary molded product 24 downward and compress it in the axial direction. By locally compressing the filter, a filter 30 having six grooves 31 extending in the axial direction on the outer circumference was obtained. [Same figure (')] In this filter 30, a concave groove 31 formed on the outer periphery
This prevents the bending line material 22 from unraveling, and suppresses the wire ends of the short bending line material 22 from protruding outward, making it difficult to lose its shape and easy to handle.

この発明は上記各実施例に限定されるものではなく、た
とえば上記各実施例では、積層充填層8の環状の圧縮成
形は、軸線方向(上下方向)のみの圧縮によりおこなっ
たが、軸線方向と同時に半径方向にも圧縮をおこなって
もよい。また凹溝31の形成時に同時に全周の半径方向
への圧縮をおこなってもよいし、また凹溝31は爪状金
型の半径方向への押付なと、他の形式の金型を用いた圧
縮成形により形成するようにしてもよい。さらに上記第
3実施例においては、積層充填18を圧縮成形した一次
成形品24に対して外周部を局部圧縮して凹溝31を形
成したが、このかわりに屈曲線材22を下型42の環状
空間内に直接供給して該下型42内に積層充填後、この
下型42と上型44により圧縮成形をおこなって外周に
凹溝31を有する環状のフィルタを得るようにしてもよ
く、この場合は一次成形工程が省略され工程が簡潔化さ
れる。また一次成形品に巻付ける締結材25としては、
直線状の線材を用いたり、第8図に示すように円筒状の
金網50を用い、これを一次成形品51の環状部をくる
むようにひと巻き以上巻付けるようにしてもよい。さら
にこの発明は、高温ガスが環状体の軸線方向に流通する
軸流方式のガス発生器用のフィルタの製造方法にも適用
できるものである。
The present invention is not limited to the above embodiments; for example, in the above embodiments, the annular compression molding of the laminated packed bed 8 was performed by compression only in the axial direction (vertical direction); Compression may also be performed in the radial direction at the same time. Further, when forming the groove 31, the entire circumference may be compressed in the radial direction at the same time, or the groove 31 may be formed by pressing the groove 31 in the radial direction with a claw-shaped mold, or by using another type of mold. It may also be formed by compression molding. Furthermore, in the third embodiment, the groove 31 is formed by locally compressing the outer circumference of the primary molded product 24 obtained by compression molding the laminated filling 18. After being directly supplied into the space and laminated and filled into the lower mold 42, compression molding may be performed using the lower mold 42 and the upper mold 44 to obtain an annular filter having grooves 31 on the outer periphery. In this case, the primary molding step is omitted, simplifying the process. Furthermore, as the fastening material 25 to be wrapped around the primary molded product,
A straight wire may be used, or a cylindrical wire mesh 50 as shown in FIG. 8 may be used, and this may be wrapped around the annular portion of the primary molded product 51 one or more turns. Furthermore, the present invention can also be applied to a method of manufacturing a filter for an axial flow type gas generator in which high-temperature gas flows in the axial direction of the annular body.

〔発明の効果〕〔Effect of the invention〕

以上説明したようにこの発明によれば、ガス発生器への
装着が容易であり、ガスのショートパス、溶損および通
気性の悪化を防止できる小型で有用なガス発生器用フィ
ルタを、a潔な工程により製造することができ、得られ
たフィルタは各種用途のガス発生器に広く利用できる。
As explained above, according to the present invention, a small and useful filter for a gas generator, which is easy to attach to a gas generator and can prevent gas short paths, melting damage, and deterioration of air permeability, is provided in a clean manner. It can be manufactured through a process, and the resulting filter can be widely used in gas generators for various uses.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の第1実施例を示すフィルタの製造工
程説明図、第2図は同じくフィルタの使用状態を示すガ
ス発生器の縦断面図、第3図はこの発明に用いる屈曲線
材の波形を示す図面、第4図はこの発明の第2実施例を
示す製造工程説明図、第5図はこの発明の第3実施例を
示す製造工程説明図、第6図は第5図(e)のA−A線
断面図、第7図は同じ<B−B線断面図、第8図はこの
発明における締結材の他の実施態様を示す縦断面図であ
る。 1・・・ステンレス鋼線、2・・・歯車、3・・・屈曲
線材、3a・・・一次回曲線材、4・・・歯車、5・・
・積層体、6・・・上型、7・・・下型、7d・・・環
状空間、8・・・積層充填層、9・・・フィルタ、21
・・・ステンレス鋼線、22・・・屈曲線材、23・・
・積層体、24・・・一次成形品、25・・・締結材、
26・・・フィルタ、30・・・フィルタ、31・・・
凹溝、41・・・突条、42・・・下型、44・・・上
型、50・・・金網、51・・・一次成形品。
Fig. 1 is an explanatory view of the manufacturing process of a filter showing the first embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view of a gas generator showing the usage state of the filter, and Fig. 3 is a diagram of the bending line material used in the present invention. Drawings showing waveforms, FIG. 4 is a manufacturing process explanatory diagram showing a second embodiment of this invention, FIG. 5 is a manufacturing process explanatory diagram showing a third embodiment of this invention, and FIG. ), FIG. 7 is a sectional view taken along the same <B-B line, and FIG. 8 is a longitudinal sectional view showing another embodiment of the fastening material according to the present invention. DESCRIPTION OF SYMBOLS 1... Stainless steel wire, 2... Gear, 3... Bent curved material, 3a... Primary curved material, 4... Gear, 5...
- Laminated body, 6... Upper mold, 7... Lower mold, 7d... Annular space, 8... Laminated packed layer, 9... Filter, 21
...Stainless steel wire, 22...Bending line material, 23...
・Laminated body, 24... Primary molded product, 25... Fastening material,
26...filter, 30...filter, 31...
Concave groove, 41... Projection, 42... Lower mold, 44... Upper mold, 50... Wire mesh, 51... Primary molded product.

Claims (1)

【特許請求の範囲】 1、線径0.1〜1.5mmの耐熱鋼線を波状またはコ
イル状に屈曲加工し、得られた屈曲線材を金型の環状空
間内に供給して環状に積層後、環状に圧縮成形すること
を特徴とするガス発生器用フィルタの製造方法。 2、線径0.1〜1.5mmの耐熱鋼線を波状またはコ
イル状に屈曲加工し、得られた屈曲線材を金型の環状空
間内に供給して環状に積層後、環状に圧縮成形して一次
成形品とし、この一次成形品の断面を取巻くように締結
材を巻付け、次にこの巻付後の一次成形品をさらに環状
に圧縮成形することを特徴とするガス発生器用フィルタ
の製造方法。 3、線径0.1〜1.5mmの耐熱鋼線を波状またはコ
イル状に屈曲加工し、得られた屈曲線材を金型の環状空
間内に供給して環状に積層後、環状に圧縮成形して外周
に軸線方向に延びる複数本の凹溝を形成させることを特
徴とするガス発生器用フィルタの製造方法。
[Claims] 1. Heat-resistant steel wire with a wire diameter of 0.1 to 1.5 mm is bent into a wave or coil shape, and the resulting bent line material is supplied into the annular space of a mold and laminated in an annular shape. A method for producing a filter for a gas generator, characterized in that the filter is then compression-molded into an annular shape. 2. Bending a heat-resistant steel wire with a wire diameter of 0.1 to 1.5 mm into a wave or coil shape, supplying the obtained bent line material into the annular space of a mold, stacking it in an annular shape, and then compression-molding it into an annular shape. A filter for a gas generator, characterized in that a fastening material is wrapped around the cross section of the primary molded product, and then the primary molded product after wrapping is further compression-molded into an annular shape. Production method. 3. Bending a heat-resistant steel wire with a wire diameter of 0.1 to 1.5 mm into a wave or coil shape, supplying the obtained bent line material into the annular space of a mold, stacking it in an annular shape, and then compression-molding it into an annular shape. A method for manufacturing a filter for a gas generator, characterized in that a plurality of grooves extending in the axial direction are formed on the outer periphery of the filter.
JP31899788A 1988-11-24 1988-12-16 Manufacture of filter for gas generator Granted JPH02164409A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP31899788A JPH02164409A (en) 1988-12-16 1988-12-16 Manufacture of filter for gas generator
DE1989627742 DE68927742T2 (en) 1988-11-24 1989-11-20 METHOD FOR PRODUCING A FILTER FOR A CARBURETOR
DE1989621302 DE68921302T2 (en) 1988-11-24 1989-11-20 Filters for gas generators and process for their manufacture.
EP94111605A EP0623373B1 (en) 1988-11-24 1989-11-20 Method of producing a filter for a gas producer
EP19890312018 EP0370734B1 (en) 1988-11-24 1989-11-20 Filter for gas producer and method for producing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31899788A JPH02164409A (en) 1988-12-16 1988-12-16 Manufacture of filter for gas generator

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP7332834A Division JP2779924B2 (en) 1995-11-27 1995-11-27 Method of manufacturing filter for gas generator

Publications (2)

Publication Number Publication Date
JPH02164409A true JPH02164409A (en) 1990-06-25
JPH051046B2 JPH051046B2 (en) 1993-01-07

Family

ID=18105345

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31899788A Granted JPH02164409A (en) 1988-11-24 1988-12-16 Manufacture of filter for gas generator

Country Status (1)

Country Link
JP (1) JPH02164409A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2331693A (en) * 1939-06-13 1943-10-12 Ind Wire Cloth Products Compan Air cleaner
JPS5422617A (en) * 1977-07-20 1979-02-20 Trw Inc Portion material of closing panel hole
JPS5583639A (en) * 1978-12-18 1980-06-24 Thiokol Chemical Corp Gas expansion structure with improved cooling filter and method of making filter
JPS6393440A (en) * 1986-10-07 1988-04-23 Chuo Spring Co Ltd Formation of metal wire compression forming article
JPS63238937A (en) * 1986-12-01 1988-10-05 サンドビック アクティエボラーグ Metallic machine element and manufacture thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2331693A (en) * 1939-06-13 1943-10-12 Ind Wire Cloth Products Compan Air cleaner
JPS5422617A (en) * 1977-07-20 1979-02-20 Trw Inc Portion material of closing panel hole
JPS5583639A (en) * 1978-12-18 1980-06-24 Thiokol Chemical Corp Gas expansion structure with improved cooling filter and method of making filter
JPS6393440A (en) * 1986-10-07 1988-04-23 Chuo Spring Co Ltd Formation of metal wire compression forming article
JPS63238937A (en) * 1986-12-01 1988-10-05 サンドビック アクティエボラーグ Metallic machine element and manufacture thereof

Also Published As

Publication number Publication date
JPH051046B2 (en) 1993-01-07

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