JPH0789039B2 - Ignition device manufacturing method - Google Patents

Description

Description: [Object of the Invention] (Field of Industrial Application) The present invention relates to a method for manufacturing an ignition device for igniting explosive powder in a combustion chamber.

(Prior Art and Problems Thereof) Conventionally, in a device that drops or releases materials from a ship or an aircraft, the drop or release uses air pressure from an air compressor. However, in order to drop and release materials from a ship or an aircraft by air pressure, an air compressor, an air cylinder, and various other related devices are required, and there is a problem that the device for dropping or discharging becomes large as a whole. . Therefore, in order to solve such a problem, as a simplification of a device for dropping or discharging, instead of air pressure, a combustion gas generated by burning explosive in the combustion chamber is ejected and this ejection gas pressure is used. A method is used. An ignition device for igniting such explosive powder in the combustion chamber is required.

However, the ignition device has an ignition chamber containing ignition powder,
It is necessary to have a heating element that ignites the ignition powder, and a positive electrode and a negative electrode for passing an electric current from the outside to the heating element. In particular, a plurality of electrodes are provided for fixing and conducting between each electrode and its peripheral members. Partial soldering is required. In the past, such soldering had to rely on manual work each time, resulting in a deterioration in work efficiency and an increase in manufacturing cost together with an increase in manufacturing man-hours. The present invention has been made to solve the above-mentioned problems, and improves the work efficiency by improving the efficiency of the soldering work, reduces the manufacturing man-hours, and manufactures the ignition device aiming at the reduction of the manufacturing cost. The purpose is to provide a method.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention is directed to an ignition tube made of a tubular conductive member and attached to one end opening side of the ignition tube. , A cylindrical electrode whose contact surface is soldered to the inner surface of the ignition cylinder, a cylindrical insulating member fitted in the cylindrical electrode and having a through hole in the center, and a through hole of the insulating member. An electrode rod having an inward protruding end connected to the cylindrical electrode via a heat generating member and an outer protruding end soldered to an insulating member; an ignition charge and an ignition charge enclosed in an ignition cylinder; In a method of manufacturing an ignition device including a powder and a synthetic resin lid that seals the opening of the other end of the ignition cylinder, at least soldering of the cylindrical electrode portion and soldering of the electrode rod are performed with thread-like solder, respectively. After molding and arranging at a target location, heating and cooling are performed at the same time.

(Operation) According to the present invention, soldering of the rod-shaped electrode portion and soldering of the cylindrical electrode portion can be performed at the same time and without manual work, so that the above object can be achieved.

(Embodiment) FIG. 1 shows an embodiment of an ignition device for applying the manufacturing method of the present invention, which is configured as follows.

Ignition cylinder 1 made of a cylindrical conductive member, cylindrical electrode 2 attached to one end opening side of ignition cylinder 1, and its contact surface soldered to the inner surface of the ignition cylinder 8; And tubular insulating members 3 and 4 fitted inside and provided with a through hole at the center,
An electrode rod which is penetrated through the through holes of the insulating members 3 and 4, the inward protruding end is connected to the cylindrical electrode 2 via the heat generating member 7, and the outward protruding end is soldered 6 to the insulating member. 5, an ignition charge 11 and an ignition charge 12 sealed in the ignition cylinder 1, and a lid 9 made of synthetic resin for sealing the opening at the other end of the ignition cylinder 1.

One end side of the ignition cylinder has projecting step portions 1B, 1C on the inner and outer peripheral surfaces.
Is formed so that the outer peripheral surface apex portion 1D thereof has a rectangular protrusion, and the inner peripheral surface step portion 1C is engaged with the flange portion 2A of the cylindrical electrode 2 for ignition. The synthetic resin lid 9 attached to the opening at the other end of the cylinder 1 is crimped by bending the tip crimping portions 1A, 1A of the ignition cylinder.

The ignition cylinder 1 is composed of a conductive member such as brass, the electrodes 2 and 5 are composed of a conductive member such as Kovar, and the heat generating member 7 is composed of a resistance wire such as a nichrome wire.

Next, a method of manufacturing the device will be described.

First, an ignition cylinder 1 having both ends open is prepared, and a cylindrical electrode 2 having a flange 2A is fitted into the thick opening at one end. Next, the tubular insulating member 3 having the electrode rod 5 penetratingly fitted in the central through hole is fitted into the tubular electrode 2. At this time, both ends of the electrode rod 5 are set so as to project. Then, one end of the nichrome wire 7 is connected to the inward protruding portion of the electrode rod 5, and the other end of the nichrome wire 7 is connected to the cylindrical electrode 2. Next, the second insulating member 4 having a recess 4A on one side and a through hole at the center is fitted into the tubular electrode 2 from the outside. At this time, the rod-shaped electrode 5 is attached so that the other end thereof projects into the recess. Such an insulating member 4 is obtained by filling an insulating resin. Then, a filamentous solder is prepared and arranged in a ring shape in the gap between the outer peripheral surface of the flange portion 2A of the cylindrical electrode 2 and the inner peripheral surface of the ignition cylinder 1, and the filamentous solder is also formed into a ring shape. The rod-shaped electrode 5 protruding into the recess 4A of the second insulating member 4 is arranged so as to surround the rod-shaped electrode 5. Then, the whole is heated to a temperature at which the filamentous solder melts. Then, the filamentous solders arranged at the two locations are melted, and by cooling, soldering can be performed at the same time.

After that, the ignition charge 11 and the ignition charge 12 are sequentially enclosed in the chamber of the ignition cylinder 1, and finally the synthetic resin lid 9 is attached and the end caulking pieces 1A, 1A of the ignition cylinder 1 are fixed by caulking.

Next, an embodiment of a combustion device using the ignition device will be described with reference to FIG.

As shown in the figure, the ignition device is mounted in the combustion cylinder 13 for use.

The combustion cylinder 13 containing this ignition device is entirely made of a cylindrical body made of aluminum, and has a right end thick portion 13A in the drawing and a left end caulking portion 13C in the drawing, and the inner surface of the thick portion 13A is An angular recess 13B formed by press-fitting the tip angular projection 1D of the ignition cylinder 1 is formed, an opening step 13E is formed on the opening side, and an inward step 13F is also formed inward. The caulking protrusion 13D is formed on the inner stepped portion 13F. Therefore, in the ignition cylinder 1, the tip angular protrusion 1D is the combustion cylinder.
It is mounted so as to be closely fitted in the angular recess 13B on the opening side of 13 and is installed by crimping the crimped portion 13D so as to press the flange portion 1B of the ignition cylinder 1.

Then, after the combustion powder 13 is loaded in the combustion cylinder 13, a synthetic resin lid 14 is attached to the opening at the other end, and the caulking piece is attached.
It is fixed by crimping 13C.

Then, on the right side of the drawing, a power source 17 is connected between the electrode rod 5 and the combustion cylinder.

Next, the operation of the combustion device will be described.

When an electric current is passed from the power source 17 between the electrode rod 5 and the combustion tube 13,
The nichrome wire 7 connected between the rod-shaped electrode 5 and the cylindrical electrode 2 generates heat, which causes the ignition charge 11 to be ignited, and the ignition charge then ignites. Simultaneously with this ignition, the synthetic resin lid burns and the burning powder 15 in the combustion chamber burns instantly. A large amount of gas is generated by this combustion, and the lid 14 made of synthetic resin is burned and blown by this gas pressure, and the gas is ejected to the outside.

[Effects of the Invention] According to the method of the present invention as described above, soldering at a plurality of locations can be performed at the same time with almost no manual work, so that work efficiency can be improved and the number of manufacturing steps can be reduced. Can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an ignition device to which the present invention is applied, and FIG. 2 is a sectional view showing an embodiment of a combustion device using the same. 1 ... Ignition tube, 2 ... Cylindrical electrode, 3,4 ... Insulating member, 5
...... Rod electrode, 6,8 ...... Solder, 9,14 …… Synthetic resin lid, 1
3 ... Combustion cylinder, 15 ... Combustion powder.

Claims (1)

[Claims] 1. An ignition cylinder made of a cylindrical conductive member, a cylindrical electrode attached to one end opening side of the ignition cylinder, the contact surface of which is soldered to the inner surface of the ignition cylinder, and the cylindrical electrode. A tubular insulating member fitted inside and having a through hole in the center, and a through hole disposed in the through hole of the insulating member, the inward protruding end being connected to the tubular electrode via a heat generating member. , An electrode rod whose outer protruding end is soldered to an insulating member, an ignition charge and an ignition charge enclosed in the ignition cylinder, and a lid made of synthetic resin for sealing the other end opening of the ignition cylinder. In the method for manufacturing an ignition device, at least the soldering of the tubular electrode portion and the electrode rod is carried out by simultaneously heating and cooling after forming thread solder and arranging it at a target location. Method.