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High temperature treating method for inflators

a high temperature treatment and inflator technology, applied in heat treatment apparatus, combustion types, furnaces, etc., can solve the problems of harmful substances, inability to apply a standardized treatment method to inflators, and danger to the body of workers, so as to promote the recovery and reuse of useful materials

Inactive Publication Date: 2005-04-21
DAICEL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] An object of the present invention is to provide a high temperature treating method for inflators for an air bag which can treat an inflator for an air bag, such as failure products produced in a manufacturing process safely and efficiently and can promote recovery and reuse of useful materials, and a metal recovering method for inflators for an air bag utilizing the high temperature treating method.
[0016] According to the high temperature treating method for inflators and the metal recovering method in the present invention, treatment can be performed safely with an excellent workability, and besides that generation of harmful substances such as dioxins can be remarkably suppressed and recovery and reuse of useful materials can be promoted.

Problems solved by technology

Further, even equivalent inflators for a driver's side are different in shape, size, material and the like depending on respective manufacturing companies, and it is therefore difficult to apply a standardized treatment method to these inflators.
Further, when a treating method is applied erroneously, it is expected that harmful substances may be generated during the treatment or an unexpected explosion may occur.
Furthermore, when melting treatment is applied for recovering metals from a treated inflator, damages to a treatment equipment due to water vapor explosion, molten metal scattering or the like may occur or the body of a worker may be endangered, and excellent workability in recovery and reuse of metals is further required.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

(1) Embodiment 1

[0023] A high temperature treating method of the present invention will be explained for each of steps below. However, as long as the object of the present invention can be achieved, the respective steps can be properly changed in the order thereof, an ordinary modification conducted by those skilled in the art can be applied to the steps. Accordingly, symbols attached to respective steps are for convenience of explanation and they are not limited to the order of the steps.

(A) Step

[0024] A treatment in a step of cutting and removing wire harnesses connected for inflator activation is performed. The treatment in (A) step is conducted before (E) step of conducting heating treatment.

[0025] Inflators for an air bag which are treatment subjects in the present invention include failure products produced in the manufacturing process as described above and the like, and these inflators include ones with various shapes, sizes and materials mixedly, but all the inflators a...

embodiment 2

(2) Embodiment 2

[0053] A metal recovering method of the present invention will be explained below for each step. The metal recovering method is a treatment method for inflators, which is conducted subsequent to the high temperature treating method for inflators explained in the Embodiment 1.

(F) Step

[0054] After the treatments in (A) to (E) steps according to the high temperature treating method for inflators are terminated, a treatment in a step of cooling the interior of the thermally treating tower 10 to take out the inflators 30 and cutting the inflators 30 taken out is conducted.

[0055] As the inflators, there are ones whose outer shell containers have an apparently sealed structure (which is not a completely sealed structure and has a nearly sealed structure where a clearance(s) is fine) or ones which have a structure in which water is easily entered and stayed. Especially, when the inflators are considered in view of materials thereof, in inflators where a main metal consti...

example 1

(A), (B) Steps

[0063] Wire harnesses connected to igniters of respective inflators were removed. Incidentally, when wire harnesses were connected directly to inflators, the wire harnesses were cut from roots thereof by snips or a nipper, and when wire harnesses were connected to inflators via connectors, the connectors were pulled out by a pulling-off jig. Further, plastic parts equipped in the inflators were removed simultaneously therewith.

(C), (D) Steps

[0064] Recovered inflators were grouped according to respective main metals constituting outer shell containers (aluminum, iron and stainless steel) and shapes thereof.

(E) Step

[0065] A high temperature treatment was conducted on inflators for a driver's side (having a disk shape, a diameter of about 70 mm and a thickness of about 28 mm; a housing is made of stainless steel having a melting point of 1450 to 1650° C.; an amount of a gas generating material is 40 g and an ignition temperature thereof is 223° C.) of the inflator...

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Abstract

The present invention provides a high temperature treating method for inflators for an air bag with an excellent workability. The present invention is a high temperature treating method for inflators for an air bag provided with a step of cutting and removing wire harnesses connected for inflator actuation, a step of performing grouping according to main metals constituting inflators, and a step of charging the inflators which have been subjected to treatment in the preceding steps into a thermally treating tower to conduct thermal treatment at a temperature at which gas generating materials inside the inflators burn and the main metals constituting inflators do not melt.

Description

TECHNICAL FIELD WHERE THE INVENTION BELONGS [0001] The present invention relates to a high temperature treating method for inflators for an air bag in which inflators for an air bag for an automobile accommodating gas generating materials therein are heated at a temperature equal to or higher than igniting temperatures of the gas generating materials to treat the inflators, and a metal recovering method. BACKGROUND ART [0002] Recently, since new cars equipped with an air bag(s) has increased, a great deal of inflators accommodating gas generating materials therein will hereafter are seen at scrapping of these cars equipped with air bags. Therefore, from the viewpoint of safety and effective utilization of resources, it is necessary to ignite the gas generating materials by thermal treatment safely to recover metals and the like therefrom. Under such circumstances, a recovery / treatment system for inflators for an air bag is being started. [0003] For treatment of inflators for an air ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B09B3/00B09B5/00B60R21/26B60R21/264F23G5/02F23G7/00
CPCB09B3/00B09B3/0083B09B5/00F23G2900/7001F23G7/003F23G2201/60B60R21/2644B09B3/40
Inventor YAMAKI, KAORUNAKAZAWA, YUJI
Owner DAICEL CHEM IND LTD
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