KR20150027520A

KR20150027520A - Automotive airbag inflator hole mold device

Info

Publication number: KR20150027520A
Application number: KR20130105979A
Authority: KR
Inventors: 김동진; 성석제
Original assignee: 김동진
Priority date: 2013-09-04
Filing date: 2013-09-04
Publication date: 2015-03-12

Abstract

The present invention relates to a mold apparatus for processing a hole (H) on the outer circumferential surface of an automotive airbag inflator (I), comprising: a lower plate (10) located in the lower part of the mold apparatus, and having an inserting device (11) and a fixing pin (13) to insert and fix an inflator (I); an upper plate (20) which is located in the upper part of the lower plate (10), is vertically interlocked, and forms the upper end of the inflator (I); and a hole processing means (30) installed on the upper plate (20) to form a hole (H) on the outer circumferential surface of the inflator (I) by using a punching technique. The present invention improves the quality of a product and price competitiveness, reduces costs, and increases productivity by shortening the production and process time since a post process like removing impurities generated inside an inflator by using a hole process due to a punching technique from the inside to the outside or the like is unnecessary.

Description

Technical Field [0001] The present invention relates to an automobile airbag inflator hole mold device,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an inflator hole processing used in an automobile airbag, and more specifically, a hole processing by an outward punching technique is used to eliminate post-processing such as removing impurities generated inside the inflator To an automobile airbag inflator hole machining mold device capable of improving productivity by reducing production and processing time, cost reduction, cost competitiveness and product quality.

Generally, the steering wheel of an automobile is provided with an air bag to reduce a driver's injury in case of a vehicle collision. The airbag has an inflator which is detonated according to a signal from a collision detection sensor for detecting whether or not the vehicle collides with the inflator, and the inflator sends gas to the airbag to supply the pressure necessary for deployment of the airbag.

Such an inflator, which is detonated according to a signal applied from a collision detection sensor for detecting whether or not the vehicle collides with the vehicle, is supplied with the pressure necessary for deploying the airbag, which is housed in the damper and housed in the airbag housing The vibration is directly exposed to the vibration transmitted through the steering wheel during driving, so that the vibration is absorbed by the damper as much as possible. Related to this, prior arts such as Korean Patent Registration No. 10-0527760 and Korean Patent Laid-Open No. 10-2007-0050302 are known.

For example, Korean Patent Registration No. 10-0527760 discloses an inflator of an airbag device accommodated in a damper body having a buffer portion and an airbag diffuser, wherein the buffer portion 1 is formed in a bellows shape and the damper body A plurality of damper diffusers 5 having a smaller diameter than the airbag diffuser 13 are arranged along the circumferential surface of the damper diffuser 5 and the damper diffuser 3 and a pressure supply pipe 7 is connected to the damper diffuser 5 and the buffer part 1, And the inflator is prevented from being detached from the damper body by deforming the cushioning portion (1) by an airbag deployment pressure applied through the pressure supply pipe (7).

As another example, Korean Unexamined Patent Application Publication No. 10-2007-0050302 discloses an inflator of an airbag module for deploying a cushion provided in an airbag housing at the time of a collision, comprising: an inflator body provided with a gas ejection port; And a resilient member provided between the inflator main body and the end cap for compensating for a difference in length between the inflator main body and the end cap, Thereby providing an inflator of the airbag module.

However, the above-mentioned prior art documents use a drilling hole machining method from the outside to the outside of the inflator in order to manufacture an inflator of an airbag. That is, during the drilling hole processing operation from the outside of the inflator to the inside, the copper foil around the hole is not cleanly cut by the ductility but is stretched and burrs protruding in a band shape and the impurities such as metal powder are buried in the inside of the inflator As a result, post-processing is necessarily required.

Therefore, a process is added to handle the troublesome work as described above, which complicates the operation, and the production and the process time are also increased due to the additional process. As a result, there is a problem that the quality of the product due to the drilling hole is lowered as well as the productivity and price competitiveness are lowered, and the uncertainty about the normal operation of the airbag is also caused.

Korean Patent Registration No. 10-0527760 "Inflator Supporting Structure of Airbag Device" (2005. 03. 03) Korean Patent Laid-Open Publication No. 10-2007-0050302 "Inflator of airbag module" (May 15, 2007)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a method of manufacturing an inflator by using hole processing by an outside punching technique, It is an object of the present invention to provide an automobile airbag inflator hole machining mold device capable of improving productivity by reducing production and processing time, cost reduction, cost competitiveness and product quality.

In order to achieve this object, the present invention provides a mold apparatus for machining a hole in an outer circumferential surface of a vehicle airbag inflator, A lower mold plate disposed at a lower portion of the mold apparatus and having an insertion port for inserting and fixing the inflator and a fixing pin; A top plate positioned above the bottom plate and meshing up and down, and working the top of the inflator; And a hole transporting unit installed on the upper plate to form holes on an outer circumferential surface of the inflator using a punching technique.

According to another aspect of the present invention, there is provided a punching machine, comprising: a punching shaft having a hole at the center thereof and moving up and down; a punching stripper having punching to surround a periphery of the punching shaft and forming a hole in an outer circumferential surface of the inflator; And a guide bar for controlling the flow.

According to the present invention, the punch stripper is provided with at least two or more punching so that the number of holes of the inflator can be arbitrarily adjusted.

It should be understood, however, that the terminology or words of the present specification and claims should not be construed in an ordinary sense or in a dictionary, and that the inventors shall not be limited to the concept of a term It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be properly defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

As described in the above construction and operation, the automobile airbag inflator hole machining mold apparatus according to the present invention does not require post-processing such as removing impurities generated inside the inflator by using hole processing by an outward punching technique As a result, it is possible to improve the productivity by shortening the production and processing time, and it is possible to reduce the cost and improve the price competitiveness and product quality.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a configuration diagram showing an inflator hole machining mold apparatus according to the present invention. Fig.
Fig. 2 is a schematic view showing the inflator hole machining mold apparatus according to the present invention in an occlusion; Fig.
3 is a structural view showing a main portion of an inflator hole machining mold apparatus according to the present invention.
Fig. 4 and Fig. 5 are views showing the hole forming process of the inflator hole machining mold apparatus according to the present invention; Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a mold apparatus for machining a hole (H) on the outer circumferential surface of an automobile airbag inflator (I), and more particularly to a mold apparatus for removing impurities generated inside the inflator (I) And moreover, it is possible to improve the productivity by shortening the production and the process time as well as to reduce the cost and improve the price competitiveness and the quality of the product.

On the other hand, in the conventional airbag inflator (I) hole processing method, a method of hole processing from the outside to the outside based on the outside of the inflator I is adopted. Such a hole processing method includes a thin copper foil and the inflator I, If impurities are left on the outer circumferential surface or the inside of the inflator I or if the inflator does not clean properly, malfunction of the air bag installed in the inflator I at the time of an accident will not reduce human injury, The present invention will now be described with reference to the accompanying drawings.

According to the present invention, the lower mold plate 10 located at the lower portion of the mold apparatus has an insertion port 11 for inserting and fixing the inflator I and a fixing pin 13. The lower mold plate 10 is formed by superimposing a plurality of mold frames (not numbered) on the upper mold plate 20, which will be described later, The insertion hole 11 and the fixing pin 13 are inserted and fixed for hole machining. The insertion port 11 forms a sufficient space for the inflator I to enter and the fixing pin 13 is inserted into the insertion hole of the inflator I It plays a role of catching. In other words, the insertion hole 11 and the fixing pin 13 formed on the lower plate 10 serve as vise which fixes the workpiece to facilitate the work.

According to the present invention, the upper plate 20, which is located above the lower plate 10 and is vertically engaged, works on the upper end of the inflator I. The upper mold plate 20 is located at the upper portion corresponding to the lower mold plate 10 and is vertically engaged with the lower mold plate 10 and holes are machined to the outer peripheral surface of the inflator I by using the air hole 30 described later.

According to the present invention, the hole (30) provided on the upper plate (20) forms a hole (H) on the outer circumferential surface of the inflator (I) using a punching technique. The hole transporting trough 30 is connected to the top plate 20, that is, the central portion, as the most important component in the present invention. The hole transporting trough 30 is formed by using a punching technique And a hole (H) is formed on the outer peripheral surface of the inflator (I).

The punching shaft 31 is located at the center and moves up and down. The punching shaft 31 surrounds the punching shaft 31 and the hole H is formed in the outer peripheral surface of the inflator I, A punching stripper 34 having a punching 33 for forming a punching strip 33 and a guide bar 37 for controlling lateral movement of the punching stripper 34 in cooperation with the punching shaft 31. The hole transporting end 30 is formed by a punching shaft 31, a punching 33, a punching stripper 34 and a guide bar 37 and cooperates with each other to form a hole H in the outer peripheral surface of the inflator I Perform machining operations. The punching shaft 31 is located at the center of the feed end 30 and moves up and down so that the punching strip 31 having the punching 33 described below instantaneously lowers one end of the punching shaft 31, (34). The punching stripper 34 has a structure that surrounds the periphery of the punching shaft 31. The punching stripper 34 inserts and fixes the punching 33 which forms the hole H on the outer peripheral surface of the inflator I into one end of the punching stripper 34, It is easy to understand if you recognize it as a ball-point cover that makes it easy to use a ball-point pen. The guide bar 37 controls the lateral movement of the punching stripper 34 in cooperation with the punching shaft 31. When the uppering plate 20 moves, the punching shaft 31 and the punching stripper 34 ) Will work accordingly. When the punching shaft 31 instantly pressurizes one end of the punching stripper 34 to generate pressure, the punching stripper 34 provided with the punching 33 spreads to the left and right. As shown in FIG.

The punch stripper 34 according to the present invention is characterized in that at least two punching portions 33 are provided to arbitrarily adjust the number of holes H of the inflator I. In order to operate the air bag, there must be a hole H which is a discharge port of the combustion gas in the inflator I. Such a hole H is formed by the punching 33 and the punch stripper 34) are provided, and the number of holes (H) is arbitrarily adjusted.

In addition, although not described in the claims, one end of the punching shaft 31 in contact with the periphery of the punching stripper 34 is provided with a step (not shown) having an inclination angle for smooth operation and execution of the punching technique. Further, a curvature is formed at one end of the guide bar 37 to control the movement of the punch stripper 34. That is, when the punching shaft 31 is pressed downward as shown in FIGS. 1 to 5, the punching stripper 34 must be pulled out in accordance with the principle. Accordingly, the punching shaft 31 and the punching stripper 34, Should be formed with a step with an inclination angle. The guide bar 37 functions as a controller for forming a tilted bend and setting a moving interval of the punch stripper 34 which is opened and closed by vertical movement of the punching shaft 31 to be constant.

1 to 5, an inflator I is mounted on an insertion port 11 and a fixing pin 13 provided on a lower mold plate 10 of a mold apparatus in operation of the hole processing mold apparatus of the present invention. . The insertion port 11 and the fixing pin 13 are arbitrarily adjustable according to the size and shape of the inflator I.

Then, the outer circumferential surface of the inflator I is subjected to hole processing by using the hole feed end 30 coupled to the top plate 20. The hole forming process of the present invention uses a punching technique from the inside to the outside of the inflator I and includes a punching shaft 31, a punching 33, a punch stripper 34 and a guide bar 37 The hole H is machined.

In detail, as shown in FIGS. 2 and 3, a punching shaft 31 is provided at the center of the lower end of the upper die plate 20 for machining by engaging the lower die 30 with the lower die plate 10 by providing a hole 30 at the lower end of the upper die plate 20 And at least two punch strippers 34 each having a punching 33 while surrounding the periphery of the punching shaft 31 are provided. A guide bar 37 is provided so as to face one end surface of the punch stripper 34 to control the moving distance of the punch stripper 34 interlocked with the punching shaft 31, Thereby keeping the spreading of the stripper 34 constant.

The hole transporting end 30 enters the inside of the inflator I while being engaged with the lower plate by the upper plate 20. The punching shaft 31 is moved downward by the step formed on the punching shaft 31 and the punching stripper 34 when the momentary pressure is applied to the punching shaft 31 and the punching stripper 34 contacting the punching shaft 31 Outward motion occurs. Thus, the punch 33 provided in the punch stripper 34 quickly hits the outer circumferential surface of the inflator I, and the hole H is formed.

As described above, since the automobile airbag inflator hole machining mold apparatus of the present invention does not require post-processing such as removing impurities generated inside the inflator by using a hole process by an outward punching technique, The productivity is improved, the cost is reduced, and the price competitiveness and product quality are improved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

10: Lower mold plate 11:
13: fixing pin 20: upper plate
30: hole feeder 31: punching shaft
33: Punching 34: Punch Stripper
37: Guide bar I: Inflator
H: hole

Claims

1. A mold apparatus for processing a hole (H) on an outer circumferential surface of an automobile airbag inflator (I);
A lower mold plate 10 located below the mold apparatus and having an insertion port 11 for inserting and fixing the inflator I and a fixing pin 13;
A top plate (20) located on the top of the bottom plate (10) and meshing up and down, working the top of the inflator (I); And
And a hole (30) provided on the upper plate (20) and forming a hole (H) on an outer circumferential surface of the inflator (I) by using a punching technique. Device.

The method according to claim 1,
The punching shaft 31 has a punching shaft 31 and a punching 33 which surrounds the punching shaft 31 and forms a hole H on the outer peripheral surface of the inflator I A punch stripper (34), and a guide bar (37) for interlocking with the punching shaft (31) and controlling the lateral movement of the punch stripper (34).

3. The method of claim 2,
Wherein the punch stripper (34) has at least two punching (33) to arbitrarily adjust the number of holes (H) of the inflator (I).