JP3401481B2 - Cast-on-strap casting method and casting apparatus in storage battery manufacturing - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cast-on-strap casting method and a casting apparatus for manufacturing a storage battery.

[0002]

2. Description of the Related Art Conventionally, in the production of storage batteries, generally lead storage batteries, positive electrode groups, that is, positive and negative electrodes arranged in a line to the left and right of each cell,
Cast-on-strap casting of the negative electrode ear row In a casting cavity that connects a pair of positive and negative ear rows that are aligned in the width direction on the upper surface of the mold after the casting mold is immersed in the molten metal in the molten lead bath and then pulled up. No. 63-269453, Japanese Patent Publication No. 3-71215, and Japanese Patent Publication No. 5-59543, the method of casting a cast-on strap in which the ear group is integrally connected by being inserted into the molten lead and cooled. It is well known from the gazette and the like.

[0003]

However, in the above-mentioned conventional technique, excess molten lead remains on the upper surface of the mold when the mold is pulled up from the mold. Therefore, when the ear row is inserted into the molten lead in the cavity and the ear row is pulled up from the cavity after the molten lead in the cavity is cooled and solidified, excess lead is solidified on the periphery of the casting strap connected to the ear row. It causes inconvenience that causes burr. These burrs fall off during handling such as transporting the electrode plates or assembling them in a battery case, resulting in internal short circuit of cells, loss in storage battery manufacturing, and internal short circuit during use of storage battery. With the inconvenience.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and is a method of manufacturing a storage battery which is capable of smoothly and reliably manufacturing a high-quality storage battery without burrs and thus without a risk of short circuit. A method for casting a cast-on-strap is provided, in which the strap casting mold is once immersed in the molten lead melt in the molten lead bath, and the strap casting cavity formed in the mold is filled with the molten lead bath. The excess molten lead removing plate is slid back and forth on the upper surface of the mold in a state of being pulled up to remove the excess molten lead, and then the ear row of the electrode plate of the lead acid battery electrode plate group is inserted into the cavity. Characterize. Further, the present invention, in the above casting method,
By providing a method for smoothly and smoothly removing excess molten lead, excess molten lead is removed by sliding the excess molten lead removal plate heated to a temperature at which molten lead does not adhere and solidify on the upper surface of the mold. It is characterized by removing. Furthermore, the present invention provides a casting apparatus for a storage battery that implements the above method, wherein a cast-on-strap mold is connected to an elevating device via a connecting member, and the elevating device operates to melt the mold into a molten lead bath. In addition to raising and lowering the inside and outside of the piston cylinder, a holding member for holding the excess molten lead removal plate is connected to the piston rod of the piston cylinder, and the surplus movement is caused by the reciprocating movement of the holding member which is interlocked with the reciprocating movement of the piston rod. It is characterized in that the molten lead removal plate is slid back and forth on the upper surface of the mold at least once to remove the excess molten lead. Further, the present invention provides a casting apparatus for performing the above manufacturing method with high efficiency, wherein the piston cylinder is connected to the upper surface of the connecting member and can be moved up and down together with the mold by the operation of the lifting device. It is characterized by having done. Further, the present invention provides a casting apparatus capable of satisfactorily removing molten lead by press contact sliding on the upper surface of the mold by reciprocating movement of the removal plate, wherein the excess molten lead removal plate holding member is the piston. The longitudinal holding member connected orthogonally to the piston rod of the cylinder is a longitudinal reciprocating member connected to the left and right rods, and a left and right rotating portion connected to both ends of the reciprocating member to move in the front-back direction. And a pair of cavities for inserting the positive and negative ears, which are arranged on the same line and arranged in the length direction. And the excess molten lead removal plate, a stopper that prevents the removal plate mounting member from swinging forward and maintains each removal plate in a vertical posture, and presses the rotating part from the back in the front-back direction and presses it against the stopper. Bias the removal plate in a vertical position Characterized by comprising the excess molten lead removal apparatus comprising a return spring that. Further, the present invention provides a casting apparatus that smoothly performs the above-mentioned casting method, wherein the central surface area surrounding the cavity is a flat surface on the upper surface of the mold, and the front and rear surface area parts before and after the central surface area. Is formed on the front and rear inclined surfaces that descend from the flat central surface area to the front end edge and the rear end edge wall over the entire length in the length direction, while the lower end of the excess molten lead removal plate is formed. It is characterized in that it is kept at a position facing the inclined surface of the mold.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. 1, FIG. 2 and FIG. 3 show an example of a casting apparatus for carrying out the cast-on-strap casting method in the storage battery of the present invention,
Reference numeral 1 denotes a cast-on-strap casting mold, which is provided so that the inside and outside of the molten lead bath 2 can be raised and lowered as described later. A group of electrode plates for lead-acid batteries, that is, positive and negative electrodes for inserting a row of positive and negative electrode plates arranged side by side on the left and right of a cell composed of positive and negative electrode plates, in which the ears are arranged alternately with separators. At least one pair of cavities 1a and 1b are arranged in the width direction of the mold 1, but in the example shown in the figure, a length suitable for casting the left and right ear rows of the positive and negative electrode plate group for 6 cells respectively. The mold 1 is shown as 6 and 6 pairs are arranged on the upper surface thereof at regular intervals in the length direction. In the molten lead tank 2, the molten metal M heated to the required temperature of the molten lead is supplied and stored in the molten lead tank 2. It is preferable that the molten lead having a constant temperature is circulated and supplied from the supply source. In the drawing, 1c shows positioning pins fixed to the upper surface of the mold 1 at both ends in its length direction, and a position with respect to the mold 1 when a plate group holder (not shown) is lowered on the upper surface of the mold. Acts as a match.

According to the present invention, the mold 1 is provided outside the molten lead bath 2, preferably as shown, adjacent to the outer surface of the rear side wall 2a of the four peripheral walls of the molten lead bath 2. Then, it is connected to an elevating device 3 installed vertically by means of a connecting member 4, and the mold 1 is freely dipped in the molten metal M in the molten lead tank 2 in conjunction with the operation of the piston rod 3a of the elevating device 3. I was able to go up and down.

One end of the connecting member 4 is connected to the mold 1, the intermediate portion of the connecting member 4 straddles the side wall 2a of the molten lead tank 2, and the other end is connected to the upper end of the piston rod 3a. Although it may be constituted by a connecting member, as shown in the drawing, a front connecting member 4a for holding a mold, the front end of which is connected to the rear side surface of the mold 1, and a piston rod 3a whose rear end is connected to the piston rod 3a. The two members of the rear connecting member 4b, which move up and down in conjunction with the operation of, are overlapped with the rear end of the front connecting member 4a and the front end of the rear connecting member 4b above the rear side wall 2a and bolted together. It is convenient for manufacturing to form a bridge-shaped connecting member which is formed by binding each other by means such as. More specifically, the connecting member 4a, which is connected to the mold 1 and serves as a front part for holding the mold, has a vertical section 4a1 having an appropriate thickness, a wide cross-section rectangular shape, and a desired height, and the lower section of the vertical section integrally. A lower horizontal portion 4a2 horizontally extending forwardly by a desired length and an upper horizontal portion 4 horizontally extending backwardly by a desired length integrally from an upper end of the vertical portion.
a3 and a molded body made of stainless steel or the like, and the front end of the lower horizontal portion 4a2 thereof is connected at the central portion of the back surface of the mold 1 in the longitudinal direction by a desired connecting means such as welding bolt fastening. The mold 1 was held. On the other hand, the rear connecting member 4b connected to the piston rod 3a has a rectangular plate-shaped horizontal member 4b1 and a horizontal plate portion 4b1 that are wider than the upper horizontal portion 4a3 of the front connecting member 4a and have a desired thickness. Vertical plate part 4b of desired length hanging from the rear end
2 and the vertical plate portion 4b2 connected to the back surface of the vertical plate portion 4b2 by a desired connecting means such as welding, and horizontally extending rearwardly to a narrow horizontal plate portion 4b.
3, and the rear end of the narrow horizontal plate portion 4b3 is connected to the upper end of the piston rod 3a by a desired connecting means such as a screw connection so as to interlock with the vertical movement of the piston rod. It is composed of a vertically movable connecting member. Thus, the upper horizontal member 4a3 of the front connecting member 4a holding the mold 1 is superposed on the upper surface of the horizontal plate portion 4b1 of the vertically movable connecting member 4b, and the both are connected by a desired binding means such as bolting. By connecting them to each other by means of 5, a bridge-shaped connecting member 4 straddling the rear side wall 2a of the molten lead tank 2 is provided. Thus, the piston rod 3a of the lifting device 3 is reciprocated in the vertical direction. As a result of the movement, the mold 1 can be immersed in the molten metal M supplied into the mold 1 in association with this.

The elevating device 3 may be directly installed on the concrete floor surface F, but in the illustrated example, the elevating device 3 is mounted on the concrete floor surface F in a U-shaped support casing 6 which will be described later. It was attached and installed as described in detail. More specifically, the support casing 6 is made of a hard material such as metal or synthetic resin, and has a front wall plate portion 6a having substantially the same height as the molten lead bath 2 and left and right wall plate portions 6b extending rearward from both ends thereof. , 6b and a bottom wall plate portion 6c, and the front wall plate portion 6a is arranged in parallel with a desired space S at the center position in the width direction behind the rear side wall 2a of the molten lead tank 2. The bottom wall plate portion 6c is fixed to the concrete floor F by a fixture 7 such as a bolt, and the front wall plate portion 6a is fixed.
The cylinder part 3b of the lifting device 3 is installed by a fixture 8 such as a screw at a desired height of the inner surface of the device and vertically on the center line of its width so that the piston rod 3a can move up and down freely. , A longitudinal through hole 9 having a desired height and width corresponding to the stroke of the piston rod 3a is formed in the front wall plate portion 6a, and the horizontal plate portion 4b3 of the rear connecting member 4b is formed in the through hole 9. Of the piston rod 3 and the front end thereof is connected to the back surface of the vertical plate portion 4b1 inserted into the space S from above by welding or the like.
The rear connecting member 4b is connected to the upper end of a so that the rear connecting member 4b can be moved up and down in conjunction with the expansion and contraction operation of the piston rod 3a of the elevating device 3, and at the same time, the front portion connected to the rear connecting member 4b. The connection member 4a is moved up and down, and the mold 1 is moved up and down at the same time. In this case, on the back surface of the vertical plate portion 4b2 of the rear connecting member that can move up and down and the front surface of the front wall plate portion 6a of the support casing 6, one pair of left and right vertical guide ridges 10 and 10 are provided. By arranging the pair of left and right vertical projections 10, 10 in the other direction and the guide groove frames 11, 11 which slidably fit, the vertically movable rear connecting member 4b can be vertically moved. It is preferable to be able to move up and down stably and satisfactorily without rolling.

Further, according to the present invention, as a casting apparatus for carrying out the cast-on-strap casting method which is a feature of the present invention, the mold 1 which can be raised and lowered above the molten lead bath 2 is located at one side of a predetermined raised position. A piston cylinder 12 extending in a forward direction perpendicular to the width direction of the mold 1 is horizontally provided, and a holding member 14 for holding a surplus molten lead removing plate 13 is connected to the tip of the piston rod 12a. The removal plate holding member 14 was reciprocated by the reciprocating motion of 12a, and the surplus molten lead removal plate 13 was slid back and forth on the upper surface of the mold 1 at least once in order to remove the surplus molten lead. In general, the removal plate holding member 1 as shown in FIG.
4 is an elongated holder 14 parallel to the length direction of the mold 1.
And disposed on the centerline of the length of the mold 1, and the removal plate holding member 14 has one electrode plate group in the longitudinal direction on the upper surface of the mold 1, that is, a pair of positive and negative cells of the cell, A pair of front and rear cavities 1a and 1b for inserting the negative electrode selvages are provided in a plurality of cells in the length direction of the mold 1, and in the illustrated example, six pairs of cavities 1a, 1b, ... Arranged. Corresponding to each of the pair of cavities 1a and 1b, located on the center axis of the cavity width, six surplus molten lead removing plates 13, 13, ... It was constructed as an excess lead removing device in which the upper surface was mounted so as to slide back and forth in a reciprocating motion. 13a in the drawing
Indicates a screw in which each removal plate 13 is attached to the holding member 14. The removing plate 14 is preferably made of a metal to which molten lead is hard to adhere, for example, a stainless material, and has a thickness of 0.2 mm, which is thin enough to give flexibility.
It is preferred to use a rectangular plate of suitable length. In this case, the width of each removal plate 13 is made wider than the width of each corresponding pair of cavities 1a, 1b in the longitudinal direction as clearly shown in FIG. For example, when the width of the cavities 1a and 1b in the lengthwise direction of the mold 1 is 30 mm, the width of the removal plate 13 is 34 to 38 mm, and the width of the cavity 1 is equal to 2 to 3 mm, and the width of the mold 1 is flat. The upper surface is in sliding contact. Thus, with the operation of the piston rod 12a, the holding member 14 is reciprocated, and the holding member 1
Excessive molten lead is removed from the six pairs of cavities 1a, 1b, ... by reciprocating the six excessive molten lead removal plates 13 by the reciprocating movement of 4 and sliding the upper surface of the mold back and forth. I did it. Next, the operation of the main casting apparatus described above will be described. From the unused state shown in FIG. 1, the piston rod 3a of the lifting device 3 is lowered to move the mold 1 to the mold as shown in FIG.
After immersing the molten metal in the cavities 1a, 1b, ... For 6 cells of the mold 1 by immersing the molten metal M in the mold M, the molten metal M is raised to a predetermined position and pulled out from the molten metal M, and then the piston cylinder 12 The piston rod 12a is advanced from the solid line shown in FIG. 1 to the phantom line and then reciprocated to the original position at least once. In such a case, the excess molten lead removal plate 13 attached to the removal plate holding member 14 connected to the piston rod 12a is accompanied by the upper surface of the mold 1 corresponding to the pair of front and rear cavities 1a,
Since it reciprocally slides in the front-rear direction while straddling 1b, excess lead on the upper surface of the mold 1 is removed. From this state, in accordance with a conventional method, although not shown, the positive and negative electrode plate ears of each electrode plate group (cell) held upside down by the electrode plate group holder are respectively placed in the corresponding pair of cavities 1a and 1b. By inserting and pulling the molten lead after cooling and solidifying, the pair of positive and negative straps, which are integrally connected to the positive and negative electrode ear rows, can be cast into good burrs-free straps. Cooling of the molten lead can be promoted by flowing cold water into the mold 1.
The cylinder 3b of the lifting device 3 installed vertically and the piston cylinder 12 installed laterally are driven by air pressure from an external drive source (not shown).

The surplus molten lead removing plate 13 is preferably made of a metal material such as stainless steel to which molten lead is hard to adhere, but when it is heated to at least the melting temperature of lead by a desired heating means. When the molten lead on the upper surface of the mold 1 is cleaned by reciprocal sliding, the molten lead does not cool and solidify and adheres to the molten lead, so that good surplus lead removal work can always be performed smoothly. As shown in the illustrated embodiment, by connecting the piston cylinder 12 to the bridge-shaped connecting member 4, the piston rod 3a of the elevating device 3 is actuated so that the mold 1 is melted in the molten lead bath 2. At the same time as being immersed in M, the excess molten lead removal plate 13
Also, since it is possible to immerse it in the molten metal M and heat it to the temperature of the molten metal by the molten metal M, it is not necessary to provide a separate heating means.

In the illustrated embodiment, during the reciprocating movement of the piston rod 12a of the piston cylinder 12,
In order to prevent rolling, it is configured as follows. That is, thick-walled square blocks 15, 15 made of stainless steel are fixedly arranged by welding or the like on the left and right of the upper surface of the horizontal plate member 4b1 of the wide plate-shaped rear connecting member 4b of the connecting member 4, and the respective blocks are arranged. Through hole 15 penetrating in the front-rear direction
a pair of left and right parallel rods 1 slidably inserted into a and 15a
The tip ends of 6, 16 are connected to the back surface of the removal plate holding member 14 by welding or the like, and either one of the blocks 15
The piston cylinder 12 was fixedly mounted on the upper surface by welding or the like. Thus, in the reciprocating process of the piston rod 12a, lateral swaying is prevented by the parallel rods 16 and 16 on the left and right, and stable and favorable reciprocating motion in the front-rear direction is obtained. The plate 13 is smoothly and properly brought about in the front-rear direction and reciprocally slides without rolling.
The work of removing the surplus molten lead on the upper surface was brought about.

Thus, in the above casting apparatus, the surplus molten lead removing plate 13 can be simultaneously moved up and down when raising and lowering the mold 1 by raising and lowering the piston rod 3a of the ascending and descending device 3, and the die 1 is lowered at that time. Since the removal plate 13 is also immersed in the molten metal M when immersed in the molten metal M, the removal plate 13 can be heated to the same temperature as the molten metal by the molten metal M, and the mold 1 is lifted from the molten metal M by the rise. After pulling up and stopping at a predetermined upward movement position, the upper surface of the mold 1 filled with molten lead is reciprocally slid by the heated removal plate 13 to remove excess lead in the cavities 1a and 1b. In addition, since the molten lead does not solidify and adhere to the heated removal plate 13, it is possible to smoothly and satisfactorily remove excess lead. Reincarnation Be performed twice are common, it is possible to perform sufficiently removed excess molten lead.

The mold 1 may have a rectangular cross-sectional shape in the width direction, but it softens the impact when the lower end of the removing plate 13 hits the front and rear end faces of the mold 1, and the removing plate 13 causes the mold 1 to move. Prevents jumping up when passing through the corners of
In order to ensure smooth sliding of the upper surface of the mold, it is preferable that the shape of the upper surface of the mold 1 is as follows and the removal plate 13 is designed to be slidable in the front-back direction. That is, as shown in the drawing, the upper surface of the mold 1 has a central surface area 1d surrounding the rows of these cavities 1a, 1b, ... 1e is formed on the front inclined surface that descends from the central surface area 1d to the front end edge and the rear end edge of the mold 1. On the other hand, the removal plate 1
The lower end of 3 is located below the horizontal plane of the central surface area 1d and at a position corresponding to the front-rear movement inclined surfaces 1e, 1e. In the illustrated example, it is located near the lower edge of the inclined surface. Thus, as the removing plate 13 reciprocates forward and backward, it gradually slides from the inclined surfaces 1e, 1e to the horizontal central surface area 1d, so that the impact when it hits the mold 1 is alleviated and removed. The plate 13 is prevented from jumping up, and smooth and favorable reciprocal sliding is possible. The inclined surfaces 1e, 1
The inclination degree θ of e is, for example, 5 ° to 7 ° with respect to the horizontal plane 1d.
A gentle slope is preferable. On the other hand, the removal plate 13 is
It may be fixedly attached to the holding member 14 in a vertically fixed state, but when sliding on the upper surface of the mold 1 as shown in the figure, it is swingably attached in the front-rear direction to further facilitate reciprocal sliding. It is preferable to be able to perform well. That is, the holding member 14 includes a long reciprocating member 14a connected to the left and right rods 16 and a connecting shaft 1 that horizontally projects from the center of the end faces of both ends thereof.
7 and 17, both ends of which are connected to square-shaped rotating members 18 and 18 rotatably provided around the shafts 17 and 17, and which are located below the reciprocating member 14a and extend in parallel therewith. It is composed of a movable removal plate attachment member 14b, and the removal plate attachment member 14b has the six excess lead removal plates 1 described above.
3, 13 were mounted along their length as described above. Furthermore, on the upper surfaces of both ends of the reciprocating member 14a, projecting left and right,
The brackets 19 and 19 which project and project above the left and right rotating members 18 and 18 are arranged, and the bracket 1
9 and 19 are provided with stoppers 20 and 20 which are always in contact with the upper surfaces of the rotating members 18 and 18, and further, the operating member 14
Between the both end portions of a and the arm portions 21 and 21 projecting on the side surface of the rod 16 extending rearward from the rear surface thereof, the return spring 22,
22, the back surface of the rotating members 18, 18 is always pressed, the upper surfaces of the rotating members 18, 18 are urged to press the stoppers 20, 20, and the slidable removing plate is provided. Removal plate 13 attached to attachment member 14b
Is configured as a surplus molten lead removing device A which is normally arranged in a vertical posture.

Thus, the above-mentioned excess molten lead removing device A is
It operates as shown in FIG. First, the device A moves forward as shown by the arrow in association with the forward movement of the piston rod 12a of the piston cylinder 12, and in the process, the mounting member 14b is moved.
The lower end of the excess lead removing plate 13 attached to the
As shown in (a), it abuts on the lower edge of the rear inclined surface 1e of the mold 1, but it does not give a shock to the mold 1 and also slides on the inclined surface 1e and rises. During the upward sliding process, the removal plate mounting member 14b is swung backward in the direction of the arrow against the extension force of the return spring 21, and the mounting member 14 is moved.
The removal plate 13 attached to b rises on the inclined surface 1e in the inclined state shown in FIG.
As shown in FIG. 5, the flat surface 1d in the central surface area is smoothly ridden on the flat surface 1d, and continuously slides to cross the flat surface 1d, while the upper portion of the molten metal m in the cavities 1a and 1b is moved. Excessive lead around the cavities 1a and 1b can be satisfactorily cleaned while being scraped off. Next in Figure 5
As shown in (b), the removal plate 13 has a front inclined surface 1e.
5 is slid down and released from the front end of the mold 1, and stopped at a predetermined frontmost position of the forward movement of the piston rod 12a as shown in FIG. 5 (b). During this forward movement, the right and left back surfaces are pressed, and accordingly, the rotating member 18 is swung forward by the extension force of the return spring 22, so that the upper surface of the rotating member 18 moves. It returns to the original position where it abuts on the stopper 20 above it, and the removal plate 13 associated therewith is held in the initial vertical posture. Next, the piston cylinder 12
When the piston rod 12a of the mold moves backward, the device A moves forward, contacts the front inclined surface 1e of the mold 1 and ascends to a flat central surface area 1
riding smoothly on the upper surface of the cavities 1a and 1b and sliding on the flat surface 1d of the outer peripheral surface of the cavity 1a, 1b.
To clean the excess lead. The removal plate 13 is shown in FIG.
As shown in (c), while the flat surface 1d that is in contact with the front inclined surface 1e of the mold 1 is slid back and forth, the rotating member 18 receives a swinging force forward by the return spring 22. Since the stopper 20 that abuts on the upper surface thereof is prevented from swinging, the removing plate mounting member 14b is also prevented from swinging forward, so that the removing plate 13 is always kept in a vertical state.
On the other hand, since the lower end of the removing plate 13 is provided in advance below the flat surface 1d of the casting mold 1, when the front slanted surface 1e and the flat surface 1d are slid back, As shown in FIG. 5 (c), the removal plate 13 in the vertical state has its lower end portion curved forward and bent into an arcuate shape as shown in FIG. Since it slides in a state of being strongly pressed, excess molten lead can be cleaned more sufficiently. Then, by the subsequent reciprocating traveling, the device A returns to the original retracted position of the piston rod 11a shown in FIG. Thus, the above-mentioned piston rod 12a
With the reciprocating movement of 1, the surplus molten lead removing work is completed by one reciprocating sliding movement of the removing plate 13. Of course, if desired, the above reciprocal sliding may be repeated twice or more to remove the excess molten lead.
It is a reciprocating motion. After the work of removing the excess molten lead of the present invention is completed, according to a conventional method, although not shown, the electrode plate group holder which holds the electrode plate group consisting of 6 cells upside down is lowered, and Inserting the selvages of the positive and negative electrode plates of the cell into the cavities 1a and 1b of the corresponding mold 1, cooling the molten lead, and pulling it up from the mold after solidification. The connected cast strap is
Obtained as a good cast strap without burrs. In such strap casting work, by lowering the piston rod 3a of the lifting device 3, the molten metal M in the molten lead tank 2 is
When it is dipped in, the molten lead m can be filled in the cavities 1a and 1b of the mold 1 and simultaneously heated to the same temperature as the molten metal by the molten metal M of the removal plate 13. After that, the piston rod 3a of the lifting device 3 is lifted to move the mold 1
Is removed from the molten metal M, and the excess molten lead on the upper surface of the mold 1 is removed by performing the above-described reciprocating sliding operation at least once with the removal plate 13 heated at the rising position. Since it is heated, the excess molten lead does not adhere due to solidification, and the excess molten lead can be removed with the removal plate 13 always in a good state.

[0015]

As described above, according to the present invention, the cast-on-strap casting mold that can be raised and lowered is lowered, immersed in the molten metal in the molten lead bath to fill the cavity with molten lead, and then, Since the excess molten lead removing plate on the upper surface of the mold was slid back and forth to remove the excess molten lead on the upper surface of the mold, not only the amount of molten metal in the cavity can be made constant, but thereafter Insert the ear row into
When casting cast-on straps, good straps without burrs can be cast. In this case, when the excess molten lead removal plate is heated to a temperature at which molten lead does not adhere and solidify, excess molten lead is prevented from adhering and solidifying to the removal plate, so that the excess molten lead can be removed smoothly and accurately. It can be performed. Further, when the apparatus for performing the cast-on-strap casting method of the present invention is configured such that the mold and the surplus molten lead removing plate are simultaneously moved up and down by the elevating device, when the molten metal is filled in the cavity of the mold, The removal plate can be heated by the molten metal at the same time. In addition, claim 5
When the excess molten lead removal device described in (1) is provided, the excess lead removal plate becomes swingable, and not only the reciprocal sliding with the upper surface of the mold is smoothly performed, but especially, due to strong pressure contact during the forward movement. Excess molten lead can be cleaned. Further, when the upper surface of the mold is a sloped surface that descends and slopes toward the front end edge and the rear end edge of the front and rear of the flat central surface area that surrounds the cavity, the surplus molten lead removing plate mold The impact at the time of contact can be alleviated and smooth reciprocal sliding can be performed.

[Brief description of drawings]

FIG. 1 is a plan view of an example of a cast-on-strap casting apparatus for carrying out a cast-on-strap casting method in manufacturing a storage battery according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a front view of the device cut along the line III-III in FIG. 1 and viewed from the direction of the arrow.

FIG. 4 is a sectional view similar to FIG. 1, showing an operating state in which the lifting device of the device shown in FIG. 1 is lowered.

FIG. 5 is a side view showing an operating state of an example of the excess molten lead removal device, and FIG. 5 (a) is a diagram showing a state when the excess molten lead removal plate moves forward and comes into contact with the mold during forward travel; 5 (b) is a state from the subsequent forward traveling to the end of the forward traveling, FIG.
(C) shows the state when the removal plate retracts during the backward movement and contacts the mold.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Mold 1a, 1b Cavity 1d Central surface area 1e Sloping surface 2 Molten lead tank 2a Rear end wall 3 of tank 3 Lifting device 3a Piston rod 4 Connecting member, Bridge-like connecting plate 12 Piston cylinder 12a Piston rod 13 Excess molten lead removing plate A Excessive molten lead removing device 14 Removal plate holding member 14a Forward member 14b Removal plate mounting member 18 Rotating member 20 Stopper 22 Return spring

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B22D 25/04 B22D 19/04 H01M 2/28

Claims (6)

(57) [Claims] 1. Excess melting in a state in which a strap casting mold is once immersed in a molten lead molten metal in a molten lead bath, and the strap casting cavity formed in the mold is filled with molten lead and pulled up from the molten lead bath. Cast in storage battery production, characterized in that a lead removal plate is slidably moved over the upper surface of the mold to remove excess molten lead, and then an ear row of electrode plates of a lead storage battery electrode plate group is inserted into the cavity. On-strap casting. 2. The storage battery manufacturing according to claim 1, wherein the excess molten lead removing plate heated to a temperature at which the molten lead does not adhere and solidify is slid back and forth on the upper surface of the mold to remove the excess molten lead. Cast-on-strap casting method in Japan. 3. A cast-on-strap mold is connected to an elevating device via a connecting member so that the mold can be moved up and down in and out of a molten lead bath by the operation of the elevating device, and at the piston rod of a piston cylinder. A holding member for holding the excess molten lead removal plate is connected, and the excess molten lead removal plate is reciprocated at least once in the front-back direction on the upper surface of the mold in accordance with the reciprocating movement of the holding member which is interlocked with the reciprocating movement of the piston rod. A cast-on-strap casting apparatus for manufacturing a storage battery, characterized by sliding to remove excess molten lead. 4. The cast-on-strap casting for manufacturing a storage battery according to claim 3, wherein the piston cylinder is connected to an upper surface of the connecting member and is moved up and down together with the mold by the operation of the elevating device. apparatus. 5. The surplus molten lead removing plate holding member is connected to the piston rod of the piston cylinder at right angles, and the long holding member is a long reciprocating member connected to the left and right rods and the reciprocating member. And a pair of cavities for insertion of the positive and negative ear rows in the removal plate mounting member, the removal plate mounting member being longitudinally swingable through left and right rotating parts connected to both ends of the moving member. Excess molten lead removal plates that are located on the same line and are respectively arranged in the lengthwise direction, and stoppers that prevent the removal plate mounting member from swinging forward and maintain each removal plate in a vertical posture. 5. A surplus molten lead removing device comprising: a return spring that presses the rotating portion from the back in the front-back direction and presses the stopper against the stopper to urge the removing plate in a vertical posture. Casting in the described battery manufacturing Strap casting equipment. 6. The upper surface of the mold has a central surface area surrounding the cavity as a flat surface, and the front and back front and rear surface area parts are extended from the flat central surface area to the front end over the entire length in the length direction. The front and rear slopes are formed so as to descend toward the edge and the rear end wall, while the lower end of the excess molten lead removal plate is placed at a position facing the slope of the mold. The cast-on-strap casting apparatus in manufacturing the storage battery according to 3, 4, or 5.