JPH09199103A - Casting device for strap connecting electrode lug group for lead-acid battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cast a uniform strap by using a servomotor for the drive source of a pump piston. SOLUTION: When the input signal set with the feed pressure and flow of molten lead in advance in response to a casting mold 41 having the aimed size and capacity is inputted to a servomotor 2, the servomotor 2 is driven correspondingly to the set input signal, and its output is transmitted to a pump piston 30 via a ball screw mechanism 4. The molten lead in a chamber 31 is guided into a cavity 47 at the preset feed pressure and flow by the downward drive of the pump piston 30, and a strap is cast by the cast-on-strap(COS) system. The dispersion of the strap weight by the conventional air cylinder drive is prevented from occurring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strap casting apparatus for connecting a lead plate ear group for a lead storage battery.

[0002]

2. Description of the Related Art Conventionally, a strap casting device for connecting a lead storage battery electrode plate ear group has a pump device on the molten lead supply source side and a cast-on-strap system (COS system) connected to the pump device.
And a mold. FIG. 2 shows the casting apparatus. On the molten lead supply source side, a hot water storage tank A storing molten lead a and a pump device 38.
Consisting of More specifically, in the hot water storage tank A, a pump piston 30 which is vertically driven by an air cylinder (not shown) and an inflow passage 32 of the molten lead a are provided on the input side of a chamber 31 slidably accommodating the pump piston. An inlet valve 33 that opens and closes, an outlet valve 35 that opens and closes an outlet 34 for molten lead on the output side thereof, and an outlet 36 for molten lead.
A pump device 38 is provided which is provided with a release valve 37 for opening and closing, respectively. The pump device 38 is connected to the outflow passage 34 of the chamber 31 via a connection block 40 provided with a horizontally fused lead flow path 39, and is provided with an electrode plate ear group for lead acid batteries by means of fused lead. The strap to be connected is connected to a mold 41 of a required size for casting by the COS method to configure a strap casting device.

As shown in FIG. 3, the mold 41 is composed of a mold main body 42 having a rectangular cross section and fused lead supply molds 43, 43 arranged on the left and right sides thereof. Each of the left and right dies 43 has a runner 44 that extends horizontally in communication with the molten lead flow path 39.
A hot water pool 46, which is guided from the runner 44 through a riser hole 45 and has an open top surface for storing molten lead, is formed. The left and right pools 46, 46 communicate with the strap casting cavities 48, 48 provided on the mold main body 42 and having an open upper surface through the weirs 47, 47. Further, above the respective weirs 47, 47, there are formed spaces 49, 49 for excess supply of molten lead.

Further, each of the molten lead supply molds 43, 43 is equipped with an electric heater 50, 50 for heating the molten lead temperature in the basin 46, 46 into the through holes 51, 51. Further, in order to detect the temperature of the molten lead a in the pools 46, 46, temperature sensors 52, 52 are provided by being inserted into the pool. On the other hand, in the mold body 42, located below the left and right cavities 48, 48, the water passage 5
3, 53 are provided so as to penetrate therethrough. Thus, heat insulating plates 54 and 54 are provided between the mold body 42 and the left and right fused lead supplying molds 43 and 43, respectively.
In the drawing, reference numeral 55 denotes a communication passage that connects the left and right runners to each other. The upper end opening surface of the overflow channel 36 closed by the release valve 37 and the weir 4 of the left and right molds 43, 43.
The heights of 7, 47 are provided at the same level.

By using the casting apparatus configured as described above, C
In order to cast the strap for connecting the lead plate ear group for the lead storage battery by the OS method, first open the inlet valve 33,
The piston 30 is driven up by an air cylinder. Then, the molten lead a in the tank A flows from the inflow path 32 into the chamber 31.
It flows into the chamber 31 and a predetermined amount of molten lead is temporarily stored in the chamber 31.

Next, the inlet valve 33 is closed, the outlet valve 35 is opened, and the pump piston 30 is driven downward by an air cylinder.
The molten lead in the molten lead flows through the outflow passage 34 and the flow passage 39 into the respective runners 44, 44 of the molten lead supply molds 43, 43, and is further introduced into the runners 43, 43. Flows into the pools 46, 46 through the riser holes 45, 45, and further passes over the weirs 47, 47 to pass through the left and right cavities 47,
47, and further oversupply spaces 49, 49
Is supplied to the excess supply level L ₁ . Next, the release valve 37 is opened. In that case, the above-mentioned excessively supplied molten lead overflows from the overflow passage 36 through the runner 44 and is returned into the molten lead tank A, and a constant supply level corresponding to the height of the weirs 47, 47. It is possible to obtain a state in which a predetermined amount of molten lead L ₂ is accumulated in the cavities 48, 48. From this state, immediately insert the left and right positive electrode plate ear groups of the electrode plate group and the lower end portions of the negative electrode plate ear groups into the corresponding left and right cavities 48, 48, and allow the molten lead to cool and solidify, and then remove it. Molding yields a plate assembly with a cast strap that connects the ears of each plate assembly. Thus, the strap forming by the COS method is completed.

[0007]

However, in the conventional strap casting apparatus for connecting the electrode plate ear group, since the air cylinder is used as the drive source for driving the pump piston 30 up and down, management of the air circuit is performed. Is complicated, and if there is some air leakage in the air circuit, it is difficult to finely adjust the supply pressure and flow rate of the molten lead casting, and therefore various capacities and sizes of different sizes are required. There is an inconvenience that the molten lead cannot be appropriately supplied according to the casting shape and that the strap weight varies so that uniform strap casting cannot be obtained.

[0008]

DISCLOSURE OF THE INVENTION The present invention provides a strap casting apparatus for connecting a lead-acid battery electrode plate ear group, which solves the above-mentioned disadvantages of the conventional strap casting apparatus. The molten lead is caused to flow into the chamber by driving, and the molten lead in the chamber is supplied to the cavity of the mold by the downward drive of the pump piston, the electrode plate ear group is inserted into the cavity, and the strap connected to this is cast. In the casting apparatus, a servomotor is used as a drive source for the pump piston.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an example of a strap casting apparatus of the present invention. According to the present invention, the fused lead supply source and the pump device except that the pump piston is driven up and down through the drive mechanism 1 including the servomotor 2 used as the drive source for driving the pump piston 30. Since the structure of the mold connected to this has the same structure as that shown in FIGS. 2 and 3 of the related art, the same components as those of the related art are denoted by the same reference numerals.

In the casting apparatus of the present invention, in the above-mentioned structure, it is preferable that the drive mechanism 1 mainly including the servo motor 2 as a drive source for driving the pump piston 30 is configured as follows. That is, in FIG. 1, the drive mechanism 1
Is a servo motor 2 having a well-known servo function capable of at least forward and reverse rotation and adjustable in rotation speed and automatically setting a preset stroke, supply pressure, flow rate or the like to a desired value. And its output shaft is connected via a belt transmission mechanism 3 to a ball screw mechanism 4 with excellent power transmission accuracy. Further, a screw shaft 5 of this ball screw mechanism 4 is connected via a connecting member 6. It is connected to the pump piston 30. Thus, the forward and reverse rotations of the motor 2 allow the pump piston 30 to move down and forward and upward and backward at a predetermined speed and stroke.

In the drawing, reference numerals 7, 8 and 9 denote an inlet valve 33, an outlet valve 35 and a release valve 3, respectively.
7 shows the actuating members for 7, the actuating members 7, 8, 9
Are operated by the respective valve control units 10, 11 and 12 at appropriate timings. Thus, these drive mechanisms 1,
The operating parts 7, 8, 9 and the valve control parts 10, 11, 12 are fixedly installed on the machine base 13.

Then, when an input signal in which the supply pressure and flow rate of the molten lead are set in advance is input to the servo motor 2 in correspondence with the mold 41 having the target size and capacity, the servo motor 2 is turned on. It drives corresponding to the set input signal, and its output is transmitted to the pump piston 2 via the ball screw mechanism 4. As a result, the lead melt in the chamber 31 is guided into the cavities 47, 47 with a preset supply pressure and flow rate by the downward drive of the pump piston 2, whereby stable strap casting by the COS method is performed.

[0013]

As described above, according to the present invention, since the servo motor is used as the drive source for driving the pump piston, the supply pressure and flow rate of the molten lead that are suitable for the capacity and size of the mold can be easily adjusted. Since it can be supplied as a drive source for the pump piston, there is no risk of variations in strap weight, which is the case when a conventional air cylinder is used as the drive source for the pump piston, and it is possible to achieve the desired uniform strap casting. Have.

[Brief description of drawings]

FIG. 1 is a side view in which a part of an example of a casting apparatus according to the present invention is cut away.

FIG. 2 is a cutting side view of a casting device including a molten lead supplying pump device and a mold.

3 is a sectional view taken along the line III-III in FIG.

[Explanation of symbols]

1 Drive Mechanism 2 Servo Motor 4 Ball Screw Mechanism 30 Pump Piston 31 Chamber 32 Inflow Path 33 Inlet Valve 34 Outflow Path 35 Outlet Valve 36 Overflow Flow Path 37 Release Valve 38 Pump Device 41 Mold 42 Mold Main Body 43 Molten Lead Supply Mold 48 Cavity

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Akihiro Tsubuki, Akihiro Tsubuki, Joban Shimo-Funao-cho, Iwaki, Fukushima Prefecture 23-6 Furukawa Battery Co., Ltd., Iwaki Plant (72) Mitsuhiko Hakozaki Joban Shimo-Funao, Iwaki, Fukushima Prefecture Pile production 23-6 Furukawa Battery Co., Ltd. Iwaki Plant (72) Inventor Tomoki Yakuta Joban Shimofunao-cho, Iwaki City, Fukushima Prefecture 23-6 Furukawa Battery Co., Ltd. Iwaki Plant

Claims (1)

[Claims] 1. A molten lead inflows into the chamber by driving the pump piston upward, and a molten lead in the chamber is supplied to the casting cavity by driving the pump piston downward to strap the electrode plate ear group in the cavity. In the casting apparatus, a servomotor is used as a source for raising and lowering the pump piston, and a strap casting apparatus for connecting a lead storage battery electrode plate ear group.