JP4134868B2 - Clad type positive electrode plate manufacturing method - Google Patents

Description

  The present invention relates to a method for producing a clad positive plate.

For electric vehicles such as electric forklifts, a clad lead storage battery using a clad positive electrode plate that can withstand deep discharge is used (see, for example, Patent Document 1).
Here, conventionally, a clad positive plate has been manufactured as shown in FIG. That is, after the glass fibers are woven into a pallet 2 having a large number of groove portions 3, the clad tube 1 impregnated with a resin to form a cylindrical body is aligned (FIG. 2A).

  In this state, after inserting the upper clad 4 made of a thermoplastic resin, for example, a polyethylene resin, which has a convex portion 11 and has a hole 19 in the center thereof into the clad tube 1 that is aligned, The fitting portion is heated, for example, a hot plate (not shown) is pressed against the fitting portion for welding. That is, the clad tube 1 and the upper joint 4 are thermally welded. Then, the cored bar 6 serving as a current collector is inserted into the hole 19 of the upper joint 4 (FIG. 2B).

  Next, with this turned upside down, the lead powder 7 that plays the role of the positive electrode active material is naturally dropped from above and filled into the clad tube 1. Finally, the lower continuous seat 5 having no hole in the center of the convex portion 11 is inserted into the clad tube 1 to complete the clad positive electrode plate (FIG. 2C).

Japanese Patent Laid-Open No. 9-147842

  However, the process of inserting the fitting portion into the clad tube 1 aligned with the pallet 2 after being inserted into the convex portion 11 of the upper joint 4 and fitting the fitting portion with a hot plate is inconvenient and troublesome. there were. The clad tube 1 has a substantially cylindrical shape, and a large number of the clad tubes 1 are arranged without gaps, so that only a part of the clad tube 1 can be welded to the convex portion 11 of the upper joint 4, and satisfactory welding strength is achieved. Could not get. Furthermore, the method of welding by applying a hot plate has a problem of poor workability.

  An object of the present invention is to provide a manufacturing method capable of industrially easily welding the clad tube 1 and the upper joint 4 aligned with the pallet 2 and having high workability.

  In order to solve the above-mentioned problems, the invention of claim 1 according to the present invention is a method for producing a clad positive plate in which a clad tube and a convex portion of an upper joint using a thermoplastic resin are welded. , Using a clad tube rotating device having a large number of rotating shafts, the one end of the clad tube pressed against the rotating shaft, and the other end of the clad tube pressed against the convex portion The shaft is rotated, the convex portion is melted by frictional heat generated on the contact surface between the clad tube and the convex portion, and the clad tube and the convex portion are welded.

  According to a second aspect of the present invention, in the method for manufacturing a clad positive plate according to the first aspect, the upper continuous seat is pressurized toward the clad tube by the continuous stocker.

  According to the present invention, the clad tube 1 and the upper joint 4 aligned with the pallet 2 can be welded industrially easily and can be welded with excellent workability.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to FIGS.

  After weaving glass fibers into a cylindrical shape, the clad tube 1 impregnated with resin to form a cylindrical body is aligned with the pallet 2 (FIG. 1 (a)). In this example, a clad tube 1 having an inner diameter of about 10 mm and a length of about 295 mm was used after weaving glass fibers into a cylindrical shape and then impregnating the resin to form a cylindrical body.

  The clad tube rotating device 8 according to the present invention is composed of a large number of rotating shafts 10 using a motor 9 as power (FIG. 1). Here, it is preferable to make the diameter of the rotating shaft 10 smaller than the inner diameter of the clad tube 1 by about 0.0 to 0.05 mm because the clad tube 1 can be easily inserted and can hardly slide after being inserted.

  That is, a large number of rotating shafts 10 are simultaneously rotated by the motor 9, and the clad tube 1 is inserted into each rotating shaft 10 and can be rotated on the pallet 2 (FIG. 1 (a), (B)). In this example, welding was performed by rotating for about 10 seconds.

  In the present invention, one end of the clad tube 1 on the pallet 2 is pressed against the rotary shaft 10, and an upper joint 4 made of a thermoplastic resin, for example, polyethylene resin, is placed on the other end of the clad tube 1 for about 10 seconds. It was pressed and welded. That is, the steps (a) to (c) shown in FIG. 1 were performed simultaneously.

  Here, using the continuous stocker 13, the upper continuous seat 4 was pressed against the clad tube 1 with a substantially constant pressure. Therefore, the rotating shaft 10 and the convex portion 11 of the upper joint 4 can be pressed to both ends of the clad tube 1 aligned with the pallet 2 at almost the same time with a constant pressure, so that excellent welding is performed. be able to.

  The polyethylene resin of the upper continuous seat 4 was melted by frictional heat generated at the contact surface between one end of the clad tube 1 and the upper continuous seat 4 so that the clad tube 1 and the upper continuous seat 4 were welded.

  In the present invention, since the polyethylene resin is dissolved by the frictional heat between the clad tube 1 and the convex portion 11 of the upper continuous seat 4, the entire periphery of the convex portion 11 of the upper continuous seat 4 in contact with the clad tube 1 is removed. It can be dissolved and welded. That is, it is possible to provide a manufacturing method that can be industrially easily welded and superior in workability as compared with the case where welding is performed by applying a hot plate.

  By using the present invention, it is possible to provide a method for manufacturing a clad positive electrode plate excellent in workability while being able to easily weld the clad tube and the upper joint seat aligned on the pallet industrially.

It is the schematic of the welding process of the clad tube concerning this invention. It is the schematic of the assembly process of a clad type positive electrode plate.

Explanation of symbols

1: clad tube, 2: pallet, 3: groove, 4: upper joint, 5: lower joint,
6: cored bar, 7: lead powder, 8: clad tube rotating device, 9: motor, 10: rotating shaft,
11: Convex part, 13: Consecutive stocker, 19: Hole

Claims (2)

In the method of manufacturing a clad positive electrode plate, which is manufactured by welding a clad tube and a convex portion of an upper joint using a thermoplastic resin,
Using a clad tube rotating device having a large number of rotating shafts, one end of the clad tube is pressed against the rotating shaft, and the other end of the clad tube is pressed against the convex portion. The clad tube and the convex portion are welded by melting the convex portion by frictional heat generated at the contact surface between the clad tube and the convex portion. Production method.   2. The method of manufacturing a clad positive plate according to claim 1, wherein the upper joint is pressed toward the clad tube by a joint stocker.

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