JP3379141B2 - Lead storage battery grid continuous casting machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead-acid battery grid continuous casting machine for supplying a grid of low cost and stable quality. 2. Description of the Related Art Lead-acid battery grids for automobiles have long been produced using so-called book mold type casting machines. In this method, the molten lead alloy is cast into a mold consisting of two cast iron blocks having a depth of engraving that is half the thickness of the grid. The productivity is not always good because of the type of production system. Therefore, an attempt was made to develop a method of manufacturing a grid with higher productivity, and the expand method was put into practical use about 10 years ago.
According to this method, the production process of the electrode plate is continuously performed from the production of the grid to the filling and drying of the power generation material, and it is expected that the quality of the electrode plate as well as the productivity is greatly improved. However, the expanding method also has a major drawback. That is, the degree of freedom of the lattice design is significantly smaller than that of the casting method. This is a major problem for lead-acid batteries for automobiles, for which there is a remarkable demand for higher performance, but is extremely difficult to solve because it is due to the essence of the expanding process. Meanwhile, as a method having a high productivity and a degree of freedom in terms of design, a lattice manufacturing technique by a continuous casting method has recently been developed. It is disclosed, for example, in Japanese Patent Publication No. 58-37057.
That is, as shown in FIG. 2, a rotating drum 1 having an engraving 3 corresponding to the shape of a lattice on its outer peripheral surface 2.
The drum 1 and the shoe 4 have a structure in which a shoe 4 serving as a molten metal supply device and having a function of suppressing leakage from the engraving 3 until the molten metal supplied to the engraving 3 is solidified. The grid body 5 formed by continuously solidifying the molten lead alloy is taken out in the form of a belt. [0004] The continuous casting method described above can produce a lattice body at a casting speed of, for example, about 30 m / min. Although the productivity is certainly about the same as that of the expanding method, However, there is a considerable problem in the quality of the produced grid. That is, as shown in FIG. 3, the structure of the pouring port 6 for supplying the molten metal to the engraving of the drum surface disclosed in Japanese Patent Publication No. 58-37057 is arranged so as to straddle the entire engraving corresponding to the horizontal bone. Therefore, the following lattice defect may be generated. First, since the pouring port 6 is slid off by a shoe (a nozzle in the present invention) in order to supply the molten metal other than the carved portion for forming the lattice body, so-called burrs 7 are easily generated. The burrs impede the filling of the paste as a power generation material, and tend to cause sites where the grid and the paste are difficult to adhere to. In addition, the generation of burrs causes the weight of the grid body to vary, making it difficult to supply batteries of stable quality. Secondly, in order to fill the engraved portion for forming the grid with the molten metal, replacement with air is indispensable. In a structure in which air does not deviate, an air reservoir 8 such as a so-called blow hole remains in the grid. Although the corrosion resistance of the lattice body may be impaired, the above-mentioned known examples do not describe any specific countermeasures. [0005] An object of the present invention is to provide a lattice body having minute defects such as burrs and blowholes by continuous casting. In order to solve the above-mentioned problems, the present invention provides a method for continuously supplying molten metal to the engraving from a pouring port of a nozzle which is in relative contact with the engraving on the outer surface of the rotating drum. A lead storage battery grid continuous casting machine for forming a grid by solidifying the same, wherein the nozzle
'S pouring port is separated into a position corresponding to the engraving the same number and the number of the grid lateral bone engraved, it is unevenly distributed near the drum rotating direction forward as opposed sprue into engravings closer to the drum both sides, and The outer peripheral surface of the drum
From the position of the engraving closest to both sides of the ram to both sides of the drum
Is characterized in that air bleeding has been applied to the portion . [0007] [action] sprue of the nozzle is separated into a position corresponding to the engraving the same number and the number of the grid lateral bone engravings, opposite the pouring port as the drum rotating direction forward engravings closer to the drum both sides And the drum is
The outer peripheral surface is the position of the engraving closest to both sides of the drum
Air bleeding is applied to the area from
By that, the air sequentially melt from the side opposing the pouring port into the mortise away from the drum both sides is substituted supplied, Ki are fed towards the engraved near sequentially the drum both sides, then the because the air that has set the engravings closest to the drum both sides can be the air vent process is discharged into the decorated with site or <br/> et external, burrs and blowholes stable by continuous casting fine grid And a highly reliable lead storage battery can be supplied. Next, embodiments of the present invention will be described. FIG.
Fig. 1 shows the configuration of a lead-acid battery lattice continuous casting machine of the present invention. Drum outer shape 413mm, width 220mm, material is FCD
Is 350, the grid shape as shown in FIG. 4 are carved write rarely on the outer peripheral surface of the drum. Each pouring hole provided in the nozzle 11 is opposed to the frame bone 91, and has a width of 2.0 mm, a length of 10 mm, and a horizontal bone 9 other than the left frame bone 91.
, Each having a width of about 1.0 mm and a length of about 10 mm , each of which is almost rectangular. Each pouring port is arranged so as to form a V-shape at an angle of 5 degrees in the rotational direction with respect to the drum rotation axis with respect to the pouring port facing the horizontal bone located at the center in the lateral direction of the drum. The shape of the air vent machining of the drum outer peripheral surface at both ends is an equilateral triangle, and the depth 0.1 mm, with 3mm pitch. With the drum on the left
Using a nozzle , melt temperature 480 ° C, drum outer surface
(Mold) temperature 130 ° C, drum (mould) rotation speed 35r
The grid was cast at pm. As a result, in the continuous casting machine using the drum and the shoe of the conventional structure, the hot water boundary caused by the blow holes as shown in FIG. 5 or the air pools as shown in FIG. On the other hand, in the continuous casting machine according to the present invention, such occurrence was not present in all cases. [0009] According to the present invention as the above, lead-acid battery grid caster according to the present invention, it is possible to supply a stable and high grid quality, industrially the effect is very large It is.

It is an illustration of BRIEF DESCRIPTION OF THE DRAWINGS [Figure 1] Lead-acid battery grid continuous casting machine according to the present invention. FIG. 2 is an explanatory diagram of a conventional lead-acid battery lattice continuous casting machine. FIG. 3 is an explanatory view of a shoe used in a conventional lead-acid battery lattice continuous casting machine. FIG. 4 is an explanatory diagram of a drum outer peripheral surface of the continuous battery storage battery caster according to the embodiment of the present invention. FIG. 5 is a schematic view showing a cross-sectional structure of a grid body cast by a conventional continuous battery storage battery grid casting machine. [Description of Signs] 1 is a drum, 3 is a carved lattice, 5 is a lattice, 6 is a pouring hole, 10 is an air vent, 11 is a nozzle, and 12 is molten metal.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshinori Dozono 832-2 Horiguchi, Katsuta-shi, Ibaraki Pref. Hitachi, Ltd. Within Hitachi Research Laboratories (58) Field surveyed (Int. Cl. ⁷ , DB name) B22D 11 / 00 B22D 11/06 330 B22D 25/04

Claims (1)

(57) [Claims 1] A molten metal is continuously supplied to the engraving from a pouring port of a nozzle which is in relative contact with the engraving on the outer peripheral surface of the rotating drum, and the molten metal is solidified to form a grid body. A lead-acid battery grid continuous caster to be formed , wherein
Pouring port is separated into a position corresponding to the engraving the same number and the number of the grid lateral bone engraved, it is unevenly distributed near the drum rotating direction forward as opposed sprue into engravings closer to the drum both sides, and, The outer peripheral surface of the drum is
From the position of the engraving closest to both sides of the drum to the sides of the drum.
A lead-acid battery grid body continuous casting machine , characterized in that the parts are subjected to air venting .