JPH11248588A - Leak inspection apparatus for air in electrolytic capacitor sealing-lid molded body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a leak inspection apparatus by which the airtightness of the bonding part of an electrode terminal part to a synthetic resin can be detected precisely and simply, by a method wherein a molded body to be inspected is placed on a fitting recessed part for a jig to be inspected, and the leak of the air force-fitted to an upper-part fitting recessed part is detected in a lower-part fitting recessed part. SOLUTION: An electrolytic capacitor sealing-lid molded body A as a jig to be inspected is placed on two right and left fitting recessed parts 12, for the jig to be inspected, in a lower-part holder 2 for the jig to be inspected. Then, right and left upper-part holders 1 for the jig to be inspected are lowered. Upper-part fitting recessed parts 11 for the jig to be inspected are fixed to prescribed positions. The air is force-fitted simultaneously to the fitting recessed parts 11 from right and left air introduction ports 16 and air introduction thin holes 13 so as to be held for 10 seconds. Then, a leak air detector (a sensor) 15 in a leak air continuity hole 14 formed in the fitting recessed parts 12 in the lower part holder 1 for the jig to be inspected detects the existence of the air leaked from the bonding part of an electrode terminal part to a synthetic resin on the basis of a pressure change. When a leak amount which is computed on the basis of the pressure change (differential pressure) is within a range of 0.5 to 0.9 cc/min, the electrolytic capacitor sealing-lid molded body A is accepted. When the leak amount is outside the range, the molded body A is rejected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for inspecting air leakage at an integrally formed joint between a metal electrode terminal and a synthetic resin of an electrolytic capacitor sealing lid molding. The inspection device according to the present invention is capable of automatically and easily detecting the presence or absence of air leakage with a small measurement error, and can be easily and simply detected. The integrally molded joint between the metal electrode terminal portion and the synthetic resin in the molded electrolytic capacitor sealing lid is provided. Related to the air leak inspection device.

[0002]

2. Description of the Related Art An electrolytic capacitor sealing lid molded body having an electrode terminal portion is formed by integrally molding an insert member forming a metal terminal portion such as aluminum or an aluminum alloy in a molding die with a thermosetting resin or a thermoplastic resin. Is obtained. In this electrolytic capacitor sealing lid molded product, the gap between the metal terminal and the synthetic resin is separated due to the difference in thermal expansion coefficient and the difference in thermal conductivity between the metal terminal and the synthetic resin. In some cases, the electrolytic solution evaporates and leaks to the outside, deteriorating the function of the electrolytic capacitor. Therefore,
Since it is necessary to sufficiently maintain the confidentiality of the joint between the electrode terminal portion and the synthetic resin, it is necessary to inspect the confidentiality of the joint. Generally, a submersion test method is applied as a method for inspecting the confidentiality of the joint.

In the submersion test method, an electrolytic capacitor sealing lid molded body is tightly fixed to a measuring jig container, the measuring jig container is immersed in a water tank, and a predetermined amount is passed through an air inlet provided in the measuring jig container. A pressure (usually 3 kg / cm ² ) is introduced for a certain period of time (10 seconds), and air leaking from the joint between the electrode terminal and the synthetic resin is collected and measured by a measuring cylinder. Further, it is a simple method of visually inspecting the presence or absence of bubbles generated by leaking air. However, this method has disadvantages that the workability is poor and that a measurement error is apt to occur and the inspection lacks accuracy.

As a means for measuring the confidentiality of the joint, there is a differential pressure type test method in which the inspected portion of the jig is sealed and pressurized with pressurized air at a constant pressure to detect a change in pressure. At present, there is no inspection apparatus to which the differential pressure type test method is applied for measuring the confidentiality of the joint between the electrode terminal part of the molded electrolytic capacitor sealing lid and the synthetic resin.

[0005]

SUMMARY OF THE INVENTION According to the present invention, the confidentiality of the joint between an electrode terminal and a synthetic resin of an electrolytic capacitor sealing lid molded body in which an electrode terminal is integrally formed can be accurately measured without measurement errors. In addition, an object of the present invention is to provide an inspection device that can easily detect the inspection.

[0006]

According to the present invention, there is provided a jig holder to be inspected which comprises a pair of upper and lower electrolytic capacitor sealing lids each having an electrode terminal portion integrally formed of synthetic resin. Inspection of the confidentiality of the joint between the electrode terminal and the synthetic resin is performed by mounting the jig under test fitting in the fitting recess, press-fitting air into the upper fitting recess, and detecting air leaking in the lower fitting recess. It is an inspection device to be performed.

That is, the present invention comprises a pair of upper and lower jig holders to be inspected, and the upper and lower jig holders each have a fitting recess for mounting the electrolytic capacitor sealing lid molded body of the jig to be inspected. An air press-fitting hole is drilled in the upper jig holder fitting recess, and a leak air conduction hole is drilled in the lower jig holder fitting recess. An air detector (sensor) is provided. The upper jig holder can be moved up and down via a ram plate and a mounting joint on a cylinder rod and shaft that operate up and down a clamp cylinder attached to an upper support plate. Attached to
On the other hand, the lower jig holder has a structure attached to the lower support, and the upper support plate and the lower support are fixed by at least four columns, and the jig holder to be inspected is formed in a pair. This is an inspection device for detecting air leakage from an integrally formed joint between a metal electrode terminal portion and a synthetic resin in an electrolytic capacitor sealing lid molded body.

Further, the present invention comprises a pair of upper and lower jig holders to be inspected, and the upper and lower jig holders each have a fitting recess for mounting the electrolytic capacitor sealing lid molded body of the jig to be inspected. An air press-fitting hole is drilled in the upper inspection jig holder fitting recess, and a leak air conduction hole is drilled in the lower inspection jig holder, and a leak air detector (sensor) is formed in the hole. O-rings are provided around the fitting concave portions of the upper and lower inspection jig holders for mounting the electrolytic capacitor sealing lid molded bodies, and the upper inspection jig holder is attached to the upper support plate. The upper and lower movable jig holders are mounted on the cylinder rod and shaft that operate up and down the clamp cylinder via a ram plate and mounting joints. A metal electrode terminal in an electrolytic capacitor sealing lid molded body having an attached structure, in which a jig to be inspected is formed in a pair of jig holders to be inspected, wherein an upper support plate and a lower support base are fixed by at least four columns. This is an inspection device that detects air leakage from an integrally formed joint between the part and the synthetic resin.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the drawings.

FIG. 1 is a front view of a jig holder device to be inspected according to the present invention. FIG. 2 shows a side view. FIG. 3 is a partial cross-sectional view showing a state in which the jig to be inspected is mounted in the fitting concave portion of the holder for the jig to be inspected, on which the electrolytic capacitor sealing lid molded body (A) is mounted. FIG. 4 is a plan view of the lower jig holder, and FIG. 5 is a sectional view taken along line AA of FIG. FIG. 6 is a plan view of the upper jig holder to be inspected, and FIG.
FIG. FIG. 8 is a view showing the appearance of the entire inspection apparatus of the present invention.

That is, the present invention comprises a pair of upper and lower inspection jig holders (1) and (2), and the upper and lower inspection jig holders (1) and (2) are provided with electrolysis of the inspection jig. The fitting recess (1) for mounting the condenser sealing lid molded body (A)
1) and (12) are formed. Upper fitting recess (1
1) is provided with an air introduction hole (13), and the lower fitting concave portion (12) has an uneven shape corresponding to the shape of the electrode terminal portion of the jig to be inspected. Joint recess (1
A leak air conducting pore (14) is formed in 2), and a leak air detector (sensor) (1) is formed in the pore (14).
5) is provided. Upper inspection jig holder (1)
Is vertically movable through a ram plate (3) and a joint (4) to a cylinder rod (8) and a shaft (9) that operate up and down a clamp cylinder (5) attached to an upper support plate (6). On the other hand, the lower jig holder (2) to be inspected has a structure attached to a lower support (7), and the upper support plate (6) and the lower support (7) have at least four columns ( 10) to form a pair.

Further, in the present invention, the O-ring (1) is provided around the upper and lower fitting concave portions (11) and (12) for mounting the electrolytic capacitor sealing lid molded body (A) of the jig to be inspected.
7) and (18) are provided to keep the airtight between the pair of jig holders (1) and (2) to be inspected and prevent leakage of press-fitted air.

A method for inspecting the confidentiality of an integrally formed joint between an electrode terminal portion of an electrolytic capacitor sealing lid molded article and a synthetic resin using the inspection apparatus according to the present invention will be described.

The two inspection capacitor jigs (A) of the electrolytic jig to be inspected are mounted on the inspection jig fitting recesses (12) of the left and right lower inspection jig holders (2), and the upper inspection jig is mounted. The holder (1) is lowered by, for example, compressed air to be fixed at a predetermined position in the fixture (11) for fitting the jig to be inspected, and is provided in the fitting recess (11) of the jig holder (1) on the left and right upper sides. Air inlet (16) and air inlet pore (1
From 3), 3 kg / cm ² of air is simultaneously press-fitted into both the left and right fitting recesses and held for 10 seconds, and the lower jig holder to be inspected is checked for air leakage from the joint between the electrode terminal and the synthetic resin. The leak air is detected by a leak air detector (sensor) (15) provided in the leak air conducting hole (14) provided in the fitting concave portion (12) of (2), and air leak is detected by a pressure change.

In the present invention, the presence or absence of air leakage is calculated by calculating the amount of leak from the pressure change (differential pressure) detected by the detectors of the right and left jig holders by the following equation. Leakage is 0.5-0.9cc / mi
n. Is determined to be acceptable if not exceeded, and rejected if exceeded this range.

That is, However, Q _1: leakage amount ΔP (cc / min.): Generating a differential pressure (mmH ₂ O) V _E: Equivalent internal volume (cc) T _3: detection time (10 sec.)

[0017]

According to the inspection apparatus of the present invention, the confidentiality of the joint portion between the electrode terminal portion and the synthetic resin of the electrolytic capacitor sealing lid molded body in which the electrode terminal portion is integrally formed can be measured accurately and without measurement errors. It can be easily detected.

[Brief description of the drawings]

FIG. 1 shows a front view of an inspection jig holder device of the present invention.

FIG. 2 shows a side view.

FIG. 3 is a partial cross-sectional view showing a state in which the jig to be inspected is mounted in a fitting concave portion of the holder for the jig to be inspected in which the electrolytic capacitor sealing lid molded body (A) is mounted.

FIG. 4 shows a plan view of a lower jig holder.

FIG. 5

FIG. 4 is a sectional view taken along line AA of FIG.

FIG. 6 is a plan view of an upper jig holder to be inspected.

FIG. 7

FIG. 6 is a sectional view taken along line BB of FIG.

FIG. 8 is a diagram showing the appearance of the entire inspection apparatus of the present invention.
The numbers in each figure indicate the following. 1, 2 ... Jig holder to be inspected 3 ... Ram plate 4 ... Joint 5 ... Clamp cylinder 6 ... Upper support plate 7 Lower support stand 8 Cylinder rod 9 Shaft 10 Support column 11, 12 Inspection target Fitting recess 13 ... Air introduction hole 14 ... Leak air conduction hole 15 ... Leak air detector (sensor) 16 ... Air inlet 17 ... O-ring

Claims (2)

[Claims] 1. An upper and lower inspection jig holder comprising a pair of upper and lower inspection jig holders, wherein the upper and lower inspection jig holders are respectively provided with fittings for mounting an electrolytic capacitor sealing lid molded body of the inspection jig. An air press-fitting hole is drilled in the jig holder fitting concave portion, and a leak air conducting hole is drilled in the lower inspected jig holder fitting concave portion, and a leak air detector (sensor) is provided in the hole. The upper inspection jig holder is mounted on the cylinder rod and shaft that operates up and down on the clamp cylinder attached to the upper support plate, and is vertically movable via a ram plate and a mounting joint. The jig holder has a structure attached to the lower support base, and the upper support plate and the lower support base are fixed by at least four columns, and the jig holder to be inspected has two. Inspecting apparatus for detecting air leakage from the integral joint between the metal electrode terminal and the synthetic resin in the electrolytic capacitors sealing lid moldings are a pair. 2. The inspection apparatus according to claim 1, wherein O-rings are provided around the fitting concave portions of the upper and lower jig holders to which the molded electrolytic capacitor sealing lids are mounted.