JPS6344432Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is applicable to the production of sintered electrode plates of storage batteries, etc.
The powder such as sintered nickel particles is conveyed as a sheet-like powder layer by a belt, etc., and in front of the sheet, this is polymerized with a belt-shaped metal core material and continuously compression-molded to form a belt-shaped electrode plate substrate. The present invention provides an air removal device for a sheet-like powder layer that can be applied to pressure-molded powder products such as manufactured products.

In the above manufacturing, for example, as shown in the first diagram, a pair of left and right endless belts B, B are arranged facing each other, and powder such as sintered powder is applied to the horizontal transition surfaces B1, B1 to an appropriate thickness. Continuously convey and supply a sheet-like powder layer with a width of 100 mm, and advance the pair of left and right sheet-like powder layers a, a, bending vertically downward and facing vertically moving surfaces B2, B2. 1 that presses against this on the outside
Pressure is applied inward by a pair of pressure forming rolls P, P,
A long porous metal core plate C is continuously inserted between the opposing belts B1 and B1 from above, and a pair of sheet-like powder layers is applied to both sides of the core plate C via the opposing belts B1 and B1. A and a are compressed and bound to obtain a single-piece compression molded sheet D.
The powder layer a before pressure molding is conveyed in a loose state containing a lot of air, so if it is pressure molded as is, it will be difficult to obtain a compression molded sheet with a relatively high density. There are drawbacks such as the layers tend to move and it is difficult to obtain a continuous sheet of a predetermined thickness.

The present invention eliminates such inconveniences and provides an air evacuation device for a sheet-like powder layer that can be applied to the above-mentioned production to enable the production of good powder band-like pressure molding. A cylindrical pressure roll 5 is provided across the layer a, with an interval 4 allowing the passage of the sheet-like powder layer a conveyed by the body 1, and placed on the upper surface of the layer a. A fixed shaft 7 inserted through the hollow portion 6 is offset in the powder supply direction and is provided in sliding contact with the inner surface of the roll 5.

Next, an example of implementing the present invention will be explained with reference to FIGS. 2 and 3. Reference numerals 1 and 1 refer to a pair of opposing endless conveyor belts, and 2 and 2 refer to a pair of pressure forming rolls that support the curved surface of each belt 1 that transitions from the horizontal transition surface 1a to the vertical downward transition surface 1b from the inside. , and the vertical transition surfaces 1b, 1b of the belts 1,1
In the meantime, the elongated porous metal core plate 3 is continuously inserted and transferred from above. The configuration of the above-mentioned device is the same as the conventional one, but according to the present invention, the sheet-like powder layer a is allowed to pass on the horizontal transition surface 1a of each belt 1, and the sheet-like powder layer a is placed on the upper surface of the layer a. A cylindrical pressure roll 5 that extends in the width direction and perpendicular to the belt 1 is installed horizontally with a small interval 4 between the belts 1 and 5, and one or both ends of the roll 5 that are inserted into the hollow part 6 of the roll 5 are placed on the outside. The held fixed shaft 7 is offset toward the powder supply direction and is provided in sliding contact with the inner surface of the roll 5. In this way, the cylindrical pressure roll 5 is fixed in place without moving as the sheet-like powder layer a moves due to the movement of the belt 1, and can also be vertically oscillated about the fixed shaft 7. Free to move. The fixed shaft 7
It may also be rotatable.

According to the present invention, the sheet-like powder layers a, a having an appropriate thickness and width are placed on each of the belts 1, 1 and transferred in the pressure forming rolls 2, 2 direction, and the When passing through the lower surface of each cylindrical pressure roll 5, it is lightly compressed by the weight of the cylindrical pressure roll 5, so that the air contained in the powder layer a is removed and the fluidity Since the sheet-like powder layer a is reduced in size and is stably supplied to the pressure-forming rolls 2, 2, a stable and uniform pressure-formed sheet 8 that is tightly compressed and bonded to the core plate 3 is formed. is obtained. Moreover, the above-mentioned cylindrical pressure roll 5
Since it is movable up and down, it is possible to easily pass the powder layer a, and the uneven or excessive pressure that occurs when pressurizing with a rotating roll with a shaft in the center is avoided. There is no abnormal encroachment into the surface of the powder layer or separation of the powder layer, and air can be removed smoothly and uniformly by continuous light pressure from the powder layer.

When the fixed shaft 7 is provided at a position above the powder layer a, there is no risk of disturbing the moving powder layer a, and a compressed powder layer a of a constant thickness can be reliably obtained.

In this way, according to the present invention, the cylindrical pressure roll 5 is placed on the upper surface of the sheet-like powder layer a transferred by the conveyor 1, and the fixed shaft 7 inserted into the hollow part 6 of the roll 5 is used to move the powder. Since it is deviated to the supply side of the layer and is provided so as to be in sliding contact with the inner surface of the roll 5,
With the roll 5, the air in the powder layer a can be removed by smoothly and lightly pressurizing the powder layer a without biting into it, and this can be continuously compressed into a sheet-like powder layer for the next application. Compression molding can be performed, and it has an extremely advantageous effect when applied to the production of compression molded sheets for storage batteries, etc.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional sintered substrate manufacturing device for storage batteries, FIG. 2 is a side view of the device to which an example of the present invention is applied, and FIG. FIG. DESCRIPTION OF SYMBOLS 1... Conveyance body, 4... Spacing, 5... Cylindrical pressure roll, 6... Hollow part, 7... Fixed shaft.

Claims (1)

[Scope of utility model registration request] A cylindrical pressure roll 5 is provided across the layer a, and has an interval 4 that allows passage of the sheet-like powder layer a conveyed by the conveyor 1, and is placed on the upper surface of the layer a. An air evacuation device for a sheet-like powder layer, comprising a fixed shaft 7 inserted through a hollow portion 6 of the roll 5, offset in the powder supply direction, and slidably in contact with the inner surface of the roll 5.