JPS58145359A - Pressure casting device for grid for lead storage battery - Google Patents

Abstract

PURPOSE:To reduce the time required for pressure casting per sheet of grids considerably, by installing two pairs of dies for a nozzle part, moving the dies and injecting molten lead alternately. CONSTITUTION:Dies 9 located on a stationary plate 1 side are moved to the position of a nozzle 8 for injection when an operating switch is operated. Upon ending of the movement, the dies 9 descend and after checking of the fitting to each other, the pressure is reduced immediately and molten lead 4 is charged through the nozzle 8 onto the dies 9. The dies 9 move upward so as to be detached from the nozzle 8 upon ending of the charging and moves to the original plate 11 side. The lead is cooled, and thereafter, the dies 9 are opened and the grid is removed. On the other hand, dies 10 move to the position of the nozzle 8 from a stationary plate 12 side at the same instant when the dies 9 move to the plate 11 side, whereafter said dies operate in the same tact as the tact of the dies 9 and finally the dies return to the plate 12 side.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a pressure casting apparatus for a grid body for lead-acid batteries.

Conventionally, this type of pressure casting equipment using inert gas has been configured with one mold for one molten lead injection nozzle. It takes about 80 to 60 seconds to obtain a lattice body, and while the lattice composition obtained by these devices has the advantage of being fine and has excellent corrosion resistance, the manufacturing time is long. The problem was that it was too much.

The present invention eliminates the above-mentioned drawbacks by installing two pairs of molds for the nozzle part and using the molds as a moving mechanism to alternately inject molten lead into each mold. This greatly reduces the time required for pressure casting per sheet.

One embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is a schematic diagram of a lattice pressurized casting apparatus according to the present invention, where l is a lead melting pot, 2 is a lead ingot charging hopper for charging lead ingots as a raw material, and 3 is a lead ingot charging hopper. Pressure pot 4 is molten lead. 5 is a lead supply solenoid valve, and the molten lead 40 level in pressure pot 3 and lead melting pot 1 is always the same 1
It is set like this.

Reference numeral 6 denotes a pressurizing section, which is filled with inert gas such as argon or nitrogen gas, and the pressurizing pot 3 is pressurized by pressurized air from the pressurizing compressor 7, and the pressure flows back into the lead melting pot 1. When the ship supply solenoid valve 5 is activated, the pressurized molten lead 4 passes through the injection nozzle 8 and is depressurized into the mold 9 or 1.
Cast into G. In order to operate this device, the mold 9 located on the fixed plate 11 side moves to the position of the injection nozzle 8 by operating the operation switch, and at the same time as the movement is completed, the mold 9 descends so that it fits into the injection nozzle 8. After confirming the fit, the pressure is immediately reduced, and the molten lead 4 is injected through the injection nozzle 8 into the mold 9. After the casting is completed, the mold 9 moves upward away from the injection nozzle 8 and moves to the original fixed plate 11. At this part, the lead that was cast into the mold 9 at around 400°C is removed. After cooling, the mold 9 is opened in order to take out the lattice body from inside (, - In the perfect mold 10, the mold 9 moves to the fixed plate 11 side and at the same time moves from the fixed plate 12 side to the position of the injection nozzle opening. Then, it operates with the same tact as the mold 9, and returns to the last die and the fixed plate 12.The above-mentioned sophisticated operations can be automatically and continuously operated, and the mold is approximately 20 to 3
A grid can be obtained every 0 seconds.

The details of the above operation will be explained with reference to FIG.

FIG. 2 shows a state in which the mold moving mechanism and the injection nozzle 8 are fitted together. In this figure, two pairs of molds 910 are initially placed at position A, mold 9. Mold lO is set at position C,
When the casting start switch is activated, the mold 9 is moved by the horizontally moving air cylinder 3 to the position B where it mates with the injection nozzle 8, and after confirming the position with the limit switch, it is moved vertically. air cylinder 1
4, the movable table and system including the mold 9 are raised downward, and the nozzle attached to the mold 9 and the injection nozzle 8 are fitted.

After injection of molten lead for a certain period of time, the air cylinder 14 mentioned above
The fitting is released, the mold system rises upward, and the mold 9 returns toward the person. At the same time, the mold 9 opens and the cast product is taken out. Simultaneously with the start of the movement of the mold 9 in the direction A, the mold 10 is moved from position C to position B by the horizontal movement air cylinder 16#c, and the mold system is again lowered 1ζ downward by the vertical movement air cylinder 14. The nozzle of the mold 1G and the injection nozzle 8 fit together.

At this time, the mold 9 has already taken out the casting, so there is no problem.

Molten lead 4 is injected for a certain period of time in the same manner as described above, and the mold 10 returns from position B to position C, and the casting is taken out. These operations can be electrically linked or manual? It is also possible to move it every cycle.

If the shape is small, use the 2-stage pressurization method, and if the shape is complex, use the 3-4 step pressure method.
It is a stage pressure method. In this multi-stage pressurization method, a relatively low pressure of 1~Ml/al is applied at the first stage, and then 6~Ml/al is applied.
A method is adopted in which the pressure is increased up to 104/all. By applying pressure in this manner, it is possible to eliminate air entrainment within the mold, casting failure, and casting cracking phenomena.

In FIG. 1, 1- is a lead supply pipe body, 11 is a pressurized air supply valve, and 1B is a pressure regulating valve.

19 is a lead ingot.

As described above, the device of the present invention Indigo (1) A lattice body without cavities, cast breaks, etc. can be obtained.

(2) A fine 3-uniform lattice body is obtained.

(3) A lattice body having a lifespan approximately 1.5 times longer than a conventional lattice body can be obtained.

(4) Grid bodies can be manufactured automatically and continuously.

(5) Two types of lattice bodies can be manufactured continuously by changing the mold to be attached.

(6) It can be easily applied to the production of pole columns and lead parts for lead-acid batteries.

It has great industrial value.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a schematic diagram of a pressurized casting device for a lattice body for a lead-acid battery showing an embodiment of the present invention, and Fig. 2 is a diagram of the fitted state of the mold moving mechanism and nozzle of this example. It is. 1 is a lead melting pot, 3 is a pressure pot, 4 is molten lead, 7 is a pressurizing compressor, 8 is an injection nozzle, 9.10 is a mold, 16 is a lead supply pipe body Patent applicant

Claims (1)

[Claims] An inert gas compressor, an appropriate lead melting pot, and a pressurizing pot are connected by a molten lead supply pipe, and the molten lead is pressurized with compressed inert gas in the pressure pot, and the mold is passed through the nozzle of the molten lead supply pipe. The device is equipped with two pairs of molds for the nozzle part, and the molds are moved so that each mold is pressure-casting the grid body alternately. A pressure casting device for a grid body for a lead-acid battery, characterized by comprising a mechanism.