JPS6341189B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clad-type anode plate and a method for manufacturing the same, in which a current collector consisting of an upper rib and a mandrel has a current collector in the vicinity of the base of the mandrel with the upper rib.
Arranging a synthetic resin ring having a large diameter part having an outer diameter matching the inner diameter of the tube to be fitted to the mandrel, and providing a narrow diameter part at a position closer to the upper rib than the large diameter part, Insert the tube into the mandrel until it reaches the narrow diameter part, and use a mold to grip the outer periphery of the part of the tube where it abuts the large diameter part, as well as the space between the tube and the narrow diameter part and the upper rib. By injection molding a synthetic resin including at least a part of the outer periphery, the narrow diameter part and the tube are fixed with the resin,
Furthermore, it is characterized in that at least a portion of the upper rib is covered.

Hereinafter, the present invention will be explained in detail with reference to the drawings showing one embodiment thereof. That is, FIG. 1 is a side cross-sectional view of a main part in the step of disposing a synthetic resin annular member 4 having a large diameter portion 3 on a mandrel 2 of a current collector, which is provided to hang down from an upper rib 1 of the current collector. It shows. In this process, the mandrel 2 is used as a molding die 5 for injection molding the synthetic resin ring 4 near the base of the upper rib 1.
A, 5B are arranged and synthetic resin is injection molded into the molds 5A, 5B, whereby the synthetic resin annular object 4 is arranged on the mandrel 2. Further, at a position closer to the upper rib than the large diameter portion 3 of the synthetic resin annular member 4, a small diameter portion 6 which is not covered with the mandrel 2 remains.

Thereafter, as shown in FIG. 2, the tube 7 is inserted into the mandrel 2 until it reaches the narrow diameter part 6 of the mandrel 2,
The molding molds 8A and 8B hold the outer periphery of the tube 7 in contact with the large diameter portion 3, and synthetic resin is applied to the space 9 between the tube 7 and the narrow diameter portion 6 and the outer periphery 10 of the upper rib 1. When 11 is injection molded, mandrel 2
The narrow diameter portion 6 and the tube 7 are fixed with a synthetic resin 11, and the upper rib 1 is also encapsulated with the resin 11, thereby producing a semi-finished product of a clad type anode plate.

Thereafter, an active material is filled between the mandrel 2 and the tube 7, and the bottom is filled at the lower connecting seat, thereby completing the clad type anode plate.

As described above, the present invention has the following effects.

a The upper end of the tube is completely sealed, so
The active material will not spill out from this part.

b The upper rib is securely covered with resin, so
Self-discharge caused by corrosion of the part can be eliminated.

c The strength of the electrode plate is improved.

d) The seal between the mandrel and the upper end of the tube is entirely made of synthetic resin, so there is no need to bulge out this part of the mandrel.

One embodiment of the present invention has been described in detail above, but
Various embodiments of the present invention can be considered without departing from the spirit thereof. For example, in the above-mentioned embodiment, the synthetic resin annular article was provided with only a large diameter portion, but a synthetic resin annular article having a shape in which a narrow diameter portion is also integrated may be used. In addition to injection molding, the synthetic resin annular object may be a semi-cylindrical object 2 having an engaging protrusion.
Various types are possible, such as one in which pieces are arranged on a mandrel and engaged with each other. Furthermore, the narrow diameter part can achieve its purpose if there is a space between the narrow diameter part and the tube for the synthetic resin to enter, so a thick diameter part with multiple vertical grooves can be used. It is also possible to adopt a configuration in which a portion with a small diameter and a portion with a small diameter are mixed together.

As mentioned above, the present invention has extremely high industrial value.

[Brief explanation of the drawing]

FIG. 1 is a side cross-sectional view of a main part in the step of disposing a synthetic resin ring having a large diameter portion on a mandrel in an embodiment of the present invention. Figures 2A and 2B are a front cross-sectional view of the main part and the main part side, respectively, showing the process of injection molding the synthetic resin between the tube and the narrow diameter part and at least a part of the outer periphery of the upper rib in the same embodiment. FIG.

Claims (1)

[Scope of Claims] 1. A current collector including an upper rib and a mandrel, near the base of the mandrel and the upper rib, a large diameter having an outer diameter that comes into contact with the inner diameter of a tube fitted to the mandrel. A synthetic resin annular object having a section is disposed, and
A narrow diameter portion is provided at a position closer to the upper rib than the thick diameter portion, and a tube is fitted into the mandrel up to the narrow diameter portion, and a gap between the tube and the narrow diameter portion and the outer periphery of the upper rib is provided. A cladding characterized in that a synthetic resin is molded including at least a part of the tube, so that the narrow diameter part and the tube are fixed with the resin, and further, at least a part of the upper rib is encapsulated. formula anode plate. 2. A synthetic resin comprising a current collector consisting of an upper rib and a mandrel, near the base of the mandrel and the upper rib, with a large diameter portion having an outer diameter that comes into contact with the inner diameter of the tube fitted to the mandrel. At the same time as arranging the annular object, a narrow diameter part is provided at a position closer to the upper rib than the large diameter part, and the tube is inserted into the mandrel until it reaches the narrow diameter part,
Using a mold, the outer periphery of the part that abuts the large diameter part of the tube is held, and the synthetic resin is injection molded including the gap where the tube communicates with the small diameter part and at least a part of the outer periphery of the upper rib. A method for manufacturing a clad anode plate characterized by: