JPH09276966A - Metallic wire molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a metallic wire molding by a simple method and to reduce the manufacturing cost of this molding by bundling plural pieces of fine metallic wires subjected to corrugating, twisting the bundle and packing the bundle into a die, then subjecting the wires to compression molding. SOLUTION: The fine material wires 2 are supplied between a pair of gears 10 meshed with each apart a specified spacing. The fine material wires 2 are subjected to corrugating, by which the corrugated fine wires 3 having a specified pitch and specified amplitude are manufactured. Next, the corrugated fine wires 3 are twisted in the state of bundling plural pieces of the wires, by which the rod-shaped fine wire bundle 4 is manufactured. Next, the fine wire bundle 4 is loaded into the die 11 and is subjected to compression molding, by which a filter 1 is obtd. As a result, the fine material wires subjected to the corrugating are easily manufactured by the simple method.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal wire molded body produced by using fine metal wires.

[0002]

2. Description of the Related Art As a method for manufacturing a metal wire molded body, there is generally known a method in which thin metal wires are plain woven or knit woven, and this is loaded into a mold and compression molded. However,
When a plain-woven metal fine wire is used, since the metal fine wires are entangled in a straight line, deformation of the metal fine wire in the direction orthogonal to the compression direction can hardly be expected at the time of compression molding. growing. Moreover,
In the plain weave state, the entanglement of thin metal wires is simple and regular, so the internal structure of the molded body is also simple and regular. In addition, when the knitted metal thin wire is used, the metal thin wire is entangled in a curved shape in the knitted state, so that the metal thin wire is also deformed in the direction orthogonal to the compression direction, eliminating the restriction on the shape of the molded body. Although it is possible, the internal structure of the molded body is a little more complicated than that of the plain weave, but it is regular. Moreover, because of the knit weaving, there are great restrictions on the mechanical properties and wire diameter of the metal thin wire.

Therefore, recently, Japanese Patent Laid-Open No. 63-9344.
As described in Japanese Unexamined Patent Publication (Kokai) No. 0-331, a method is provided in which a metal thin wire is crimped by being sandwiched between a pair of rollers having different rotation speeds and sent out, and the metal thin wire is loaded into a mold and compression molded. , As described in JP-A-3-174937,
A corrugation process is performed by passing a metal thin wire between a pair of first gears, and a metal thin wire is passed between a pair of second gears that are orthogonal to the first gear and have a module smaller than the first gear, from different two directions. A method has been proposed in which thin metal wires are formed into a three-dimensional wave shape that is bent into a wave shape having a different pitch, and the thin metal wires are loaded into a mold and compression molded.

[0004]

The molding techniques described in the above two publications can solve the problems in the case of molding using a fine metal wire that is plain woven or knitted, but the entanglement of the fine metal wire And the strength of the molded product is reduced, and the molded product tends to vary. Further, when using this type of molded body as a filter for shutting off the flame of an airbag device, it is preferable to have a complicated intricate communication passage inside the filter, but the molded body described in the above publication also has a communication passage. It was difficult to get enough involved.

An object of the present invention is to provide a metal wire molded body which can be manufactured at low cost, has complicated metal fine wire entanglement and is excellent in strength, and has complicated internal communication passages.

[0006]

According to a first aspect of the present invention, there is provided a metal wire compact formed by bundling a plurality of corrugated metal fine wires, twisting them, and loading the wires into a mold to perform compression molding. It is a thing. Here, as described in claim 2, it is a preferred embodiment that a plurality of waves formed by corrugation are arranged in the same plane.

[0007]

In the metal wire molded body according to the present invention, since a plurality of corrugated metal thin wires are bundled and twisted, in this state, the plurality of metal thin wires are intricately entangled with each other and each metal The thin wire will be twisted while changing the direction of the wave. Therefore, when a twisted metal wire bundle is loaded into a mold and compression-molded, the metal wire is also deformed in a direction orthogonal to the compression direction, and the waves of the metal wire bundle are intricately entangled with each other. In addition to being provided with sufficient strength, a complicated and complicated communication passage is formed inside the molded product. Further, since the metal thin wire is not knitted, restrictions on mechanical properties and thickness of the metal thin wire are alleviated. As described in claim 2, when a plurality of waves formed by corrugation are arranged in the same plane, the corrugation is performed by supplying a thin metal wire between a pair of gears meshing with each other. You can make fine metal wires.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The present embodiment is a case where the present invention is applied to a filter for blocking the flame of an airbag device. As shown in FIG. 1, the filter 1 is for shutting off the flame during operation of the gas generator of the airbag device to supply only the gas to the airbag and for cooling the supplied gas. The thin wire 2 is compression-molded into a flat annular shape as described later. Inside the filter 1, a complicated and complicated communication passage is formed to shut off the flame without obstructing the flow of the generated gas and to cool the gas. However, filter 1
The shape and size of can be appropriately set according to the airbag device to be assembled. As the material of the metal thin wire 2, various metal thin wires such as stainless steel, nickel alloy, iron, copper, aluminum and alloys thereof can be used.

Next, a method of molding the filter 1 will be described. First, as shown in FIG. 2 (a), the metal thin wire 2 is supplied between a pair of gears 10 that mesh with each other with a certain space, and the metal thin wire 2 is corrugated and is subjected to a constant pitch. Moreover, the corrugated thin wire 3 having a constant amplitude is manufactured.

Next, as shown in FIG. 2B, a plurality of corrugated thin wires 3 (four in the illustrated example) are twisted in a bundled state,
A rod-shaped thin wire bundle 4 is manufactured. In this state, as shown in FIG. 3, the plurality of bundled metal thin wires 2 are intricately entangled with each other, and each metal thin wire 2 is twisted while changing the direction of the wave.

Next, as shown in FIG. 2C, the thin wire bundle 4
Is loaded into the mold 11 and compression-molded to obtain the filter 1. At this time, the thin wire bundle 4 is also deformed in the radial direction, and the waves of the thin wire bundle 4 are intricately entangled with each other, giving sufficient strength to the filter 1, and
Inside the filter 1, complicated communication paths are formed. In order to minimize the problem that the filter 1 is dislocated from the end portion of the thin wire bundle 4 after compression molding, the end portion of the thin wire bundle 4 is inserted into the middle portion in the radial direction of the molding cavity before compression molding. Good.

Regarding the diameter of the metal thin wire 2, the pitch and amplitude of the wave of the corrugated thin wire 3, the number of the corrugated thin wires 3 used in the thin wire bundle 4 and the number of twists per fixed length, and the numerical values such as compression molding pressure. Is set according to the size of the filter 1, the required strength, the ventilation resistance, and the like. Alternatively, a plurality of corrugated thin wires 3 having different materials, diameters, wave pitches, amplitudes, etc. may be bundled and twisted to form a thin wire bundle 4.

In this embodiment, the present invention is applied to the filter 1 of the airbag device, but the present invention is also applied to filters of other devices and metal wire moldings used for cushioning, heat insulation and the like. Can be similarly applied. Further, such a metal wire molded body is molded into various shapes such as a cylindrical shape, a plate shape, and a columnar shape according to the purpose of use and the site of use.

[0014]

According to the metal wire molded body of the present invention, a plurality of thin metal wires that have been corrugated are bundled and twisted, and then loaded into a mold for compression molding. Since it can be manufactured, the manufacturing cost of the metal wire molded body can be reduced.
Also, since it is a molded body molded by such a method,
The restrictions on the shape of the molded product can be relaxed, and moreover, sufficient strength can be imparted to the molded product. Further, since the thin metal wire is not knitted, restrictions on mechanical properties, thickness, etc. of the thin metal wire are alleviated, and it becomes possible to manufacture a molded product using the thin metal wire made of a material suitable for use conditions. In addition, since it is possible to form a complicated and complicated communication passage inside the molded product, when applied to an airbag device,
It becomes possible to efficiently block the flame. According to the second aspect of the invention, the corrugated metal fine wire can be easily manufactured by a simple method of supplying the metal fine wire between the pair of gears meshing with each other.

[Brief description of drawings]

FIG. 1 Plan view of the filter

2A is an explanatory view of a corrugating process, FIG. 2B is an explanatory view of manufacturing a thin wire bundle, and FIG. 2C is an explanatory view of compression molding.

FIG. 3 An enlarged view of a thin wire bundle

[Explanation of symbols]

 1 Filter 2 Metal fine wire 3 Corrugated fine wire 4 Fine wire bundle 10 Gear 11 type

Claims (2)

[Claims] 1. A metal wire molded body obtained by bundling a plurality of corrugated metal thin wires, twisting them, loading them into a mold and compression-molding them. 2. The metal molded body according to claim 1, wherein a plurality of waves formed by corrugation processing are arranged in the same plane.